Vitamin D deficiency is of concern now a days, it has important role in skeletal and non skeletal functions of the body. Good sunlight exposure, consumption of vitamin D rich foods, chemotherapy with vitamin D and supplements of vitamin D has shown positive effect on various non skeletal diseases like cancer, diabetes, diarrhoea, tuberculosis etc. Although Indians are blessed with ample sunlight, still 70 to 100% population is suffering from the vitamin D deficiency. Vitamin D deficiency is likely to play an important role in the very high prevalence of rickets, osteoporosis, cardiovascular diseases, diabetes, cancer and infections such as tuberculosis in India. Fortification of staple foods with vitamin D is the most viable population based strategy to achieve vitamin D sufficiency. Unfortunately, even in advanced countries like USA and Canada, food fortification strategies with vitamin D have been only partially effective and have largely failed to attain vitamin D sufficiency
All About Vitamin D
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vitamin d is one of the fat soluble vitamin on which there is great emphasis in the present scenario. it is present in breast milk in very minute amount so it is recommended that it must be supplemented right after birth to prevent it deficiency which in children can result in rickets. if not diagnosed and treated in time it may result in number of bony deformities . in adults besides oesteomalacia it is associated with n umber of non communicable diseases.
Vitamin D
forms of vitamin D
difference between vitamin D2 and vitamin D3
Metabolism of vitamin D
Dietary requirement of vitamin D
Functions of vitamin D
Symptoms of vitamin D deficiency
Presented at Johns Hopkins Bayview Medical Center. Evidence-based research surrounding the potential association between vitamin D deficiency and risk for developing gestational diabetes among pregnant women and women of reproductive age.
All About Vitamin D
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vitamin d is one of the fat soluble vitamin on which there is great emphasis in the present scenario. it is present in breast milk in very minute amount so it is recommended that it must be supplemented right after birth to prevent it deficiency which in children can result in rickets. if not diagnosed and treated in time it may result in number of bony deformities . in adults besides oesteomalacia it is associated with n umber of non communicable diseases.
Vitamin D
forms of vitamin D
difference between vitamin D2 and vitamin D3
Metabolism of vitamin D
Dietary requirement of vitamin D
Functions of vitamin D
Symptoms of vitamin D deficiency
Presented at Johns Hopkins Bayview Medical Center. Evidence-based research surrounding the potential association between vitamin D deficiency and risk for developing gestational diabetes among pregnant women and women of reproductive age.
VITAMIN D[ SUNSHINE VITAMIN] MEDICINAL CHEMISTRY BY P. RAVISANKAR, CHEMISTRY ...Dr. Ravi Sankar
VITAMIN D[ SUNSHINE VITAMIN] MEDICINAL CHEMISTRY BY P. RAVISANKAR, CHEMISTRY OF VITAMIN D ,STRUCTURES OF VITAMIN D1,D2,D3,D4,D5, VITMIN D SOURCES,RECOMMENDED DIETARY ALLOWANCE,VITAMIN D DEFICIANCY OCCURS IN ,MECHANISM OF ACTION,VITAMIN D FUNCTIONS,VITAMIN D DEFICIENCY(RICKETS),PHYSIOLOGICALROLE/IMPORTANCE,ADVERSE/TOXIC EFFECTS,USES OF VITAMIN D
BY P.RAVISANKAR, VIGNAN PHARMACY COLLEGE, VADLAMUDI, GUNTUR, A.P, INDIA.
Magnesium is an essential mineral required by every organ in the body for a range of activities including bone, protein and fatty acid formation. It is also essential in activating vitamins B and D, relaxing muscles, regulating calcium levels and helping blood to clot and is required for the secretion of insulin. Many of us do not get enough magnesium in our diets. Adults require about 300 to 400 milligrams a day.
Vitamin D deficiency is recognized as a global public health problem, with deficiency states reported from various countries. Acting as a Pro- Hormone; this is a unique endogenously synthesized vitamin. Besides its pivotal role in calcium homeostasis and bone mineral metabolism, the vitamin-D endocrine system is now recognized to sub-serve a wide range of fundamental biological functions in cell differentiation, inhibition of cell growth, and immunomodulation. Vitamin-D deficiency affects not only musculoskeletal health but also a wide range of acute and chronic disease. The metabolic product of vitamin-D is a potent, pleiotropic, repair and maintenance; secosteroid hormone that targets more than 200 human genes in a wide variety of tissues, meaning it has as many mechanisms of action on genes it targets. Two related sterol compounds viz. Cholecalciferol [Vitamin-D3] and Ergocalciferol [Vitamin-D2] are grouped as ‘Vitamin-D’. Cholecalciferol is of animal origin and the other Ergocalciferol [Vitamin-D2] is plant based. Interestingly, antirachitic properties of Vitamin-D2 and D3 are identical. After oral administration; Vitamin-D3 is absorbed better than D2 in small intestine; and bile is essential for absorption.
Vitamin D And Chronic Periodontitis – A Randomised Double Blinded Placebo Con...inventionjournals
Background: Vitamin D is crucial for a wide variety of organ systems; nevertheless, evidence has demonstrated that vitamin D deficiency may place subjects at risk for not only low mineral bone density /osteoporosis and osteopenia but also infectious and chronic inflammatory diseases Vitamin D also has anti-inflammatory effects by suppressing pro-inflammatory cytokines through its effect on bone and mineral metabolism, innate immunity and several VDR gene polymorphisms, vitamin D has been reported to be associated with periodontal disease. Objectives: To assess anti-inflammatory effect of vitamin D3, when administered as monotherapy in generalised chronic periodontitis. Methods: This study comprises of 56 patients of generalised chronic periodontitis who were screened for their serum vitamin D3 levels. Out of which 30 patients who were vitamin D3 deficient (<20ng /><0.002)><0.000). Conclusion: Vitamin D deficiency may place subjects at risk for not only low bone mineral density/osteoporosis and osteopenia, but also infectious and chronic inflammatory diseases like periodontitis.
Vitamin D And Chronic Periodontitis – A Randomised Double Blinded Placebo Con...inventionjournals
Background: Vitamin D is crucial for a wide variety of organ systems; nevertheless, evidence has demonstrated that vitamin D deficiency may place subjects at risk for not only low mineral bone density /osteoporosis and osteopenia but also infectious and chronic inflammatory diseases Vitamin D also has anti-inflammatory effects by suppressing pro-inflammatory cytokines through its effect on bone and mineral metabolism, innate immunity and several VDR gene polymorphisms, vitamin D has been reported to be associated with periodontal disease. Objectives: To assess anti-inflammatory effect of vitamin D3, when administered as monotherapy in generalised chronic periodontitis. Methods: This study comprises of 56 patients of generalised chronic periodontitis who were screened for their serum vitamin D3 levels. Out of which 30 patients who were vitamin D3 deficient (<20ng /><0.002)><0.000). Conclusion: Vitamin D deficiency may place subjects at risk for not only low bone mineral density/osteoporosis and osteopenia, but also infectious and chronic inflammatory diseases like periodontitis.
ABSTRACTBackground Obesity is associated with vitamin D ins.docxransayo
ABSTRACT
Background: Obesity is associated with vitamin D insufficiency
and secondary hyperparathyroidism.
Objective: This study assessed whether obesity alters the cuta-
neous production of vitamin D3 (cholecalciferol) or the intestinal
absorption of vitamin D2 (ergocalciferol).
Design: Healthy, white, obese [body mass index (BMI; in kg/m2)
≥ 30] and matched lean control subjects (BMI ≤ 25) received
either whole-body ultraviolet radiation or a pharmacologic dose
of vitamin D2 orally.
Results: Obese subjects had significantly lower basal 25-
hydroxyvitamin D concentrations and higher parathyroid hor-
mone concentrations than did age-matched control subjects.
Evaluation of blood vitamin D3 concentrations 24 h after
whole-body irradiation showed that the incremental increase
in vitamin D3 was 57% lower in obese than in nonobese sub-
jects. The content of the vitamin D3 precursor 7-dehydrocho-
lesterol in the skin of obese and nonobese subjects did not dif-
fer significantly between groups nor did its conversion to
previtamin D3 after irradiation in vitro. The obese and
nonobese subjects received an oral dose of 50 000 IU (1.25
mg) vitamin D2. BMI was inversely correlated with serum
vitamin D3 concentrations after irradiation (r = �0.55,
P = 0.003) and with peak serum vitamin D2 concentrations
after vitamin D2 intake (r = �0.56, P = 0.007).
Conclusions: Obesity-associated vitamin D insufficiency is
likely due to the decreased bioavailability of vitamin D3 from
cutaneous and dietary sources because of its deposition in body
fat compartments. Am J Clin Nutr 2000;72:690–3.
KEY WORDS Vitamin D, ultraviolet radiation, tanning bed,
obesity, 25-hydroxyvitamin D, parathyroid hormone, obesity,
vitamin D3, sunlight, obesity, 25-hydroxyvitamin D3, bioavailability
INTRODUCTION
Obese individuals, as a group, have low plasma concentra-
tions of 25-hydroxyvitamin D [25(OH)D] (1–5), which are asso-
ciated with increased plasma concentrations of immunoreactive
parathyroid hormone (1, 6, 7). Although the explanation for the
increased risk of vitamin D deficiency in obesity is unknown, it
has been postulated that obese individuals may avoid exposure to
solar ultraviolet (UV) radiation, which is indispensable for the
cutaneous synthesis of vitamin D3 (3). Alternatively, it has been
proposed that production of the active vitamin D metabolite
1,25-dihydroxyvitamin D [1,25(OH)2D] is enhanced and thus, its
higher concentrations exert negative feedback control on the
hepatic synthesis of 25(OH)D (1). It has also been suggested that
the metabolic clearance of vitamin D may increase in obesity,
possibly with enhanced uptake by adipose tissue (2).
Clarification of the mechanism for the subnormal concentra-
tions of 25(OH)D in obesity is nevertheless relevant for the man-
agement of this highly prevalent condition. If, for example, the
increased risk of vitamin D deficiency were the expression of a
lack of exposure to sunlight, it would perhaps be only of acade-
mic in.
Overview of the Health Benefits of Vitamin C by Prof Margreet VissersKiwifruit Symposium
Prof Margreet Vissers, Research Professor at University of Otago, New Zealand: http://www.kiwifruitsymposium.org/presentations/overview-of-the-many-health-benefits-of-vitamin-c/
Presented at 1st International Symposium on Kiwifruit and Health.
Vitamin C is essential for life, and humans obtain this nutrient exclusively through the diet. It functions inside the cells in our bodies, where it plays an important role in supporting many essential processes. One kiwifruit a day gives the daily requirement of vitamin C.
How many patients does case series should have In comparison to case reports.pdfpubrica101
Pubrica’s team of researchers and writers create scientific and medical research articles, which may be important resources for authors and practitioners. Pubrica medical writers assist you in creating and revising the introduction by alerting the reader to gaps in the chosen study subject. Our professionals understand the order in which the hypothesis topic is followed by the broad subject, the issue, and the backdrop.
https://pubrica.com/academy/case-study-or-series/how-many-patients-does-case-series-should-have-in-comparison-to-case-reports/
CRISPR-Cas9, a revolutionary gene-editing tool, holds immense potential to reshape medicine, agriculture, and our understanding of life. But like any powerful tool, it comes with ethical considerations.
Unveiling CRISPR: This naturally occurring bacterial defense system (crRNA & Cas9 protein) fights viruses. Scientists repurposed it for precise gene editing (correction, deletion, insertion) by targeting specific DNA sequences.
The Promise: CRISPR offers exciting possibilities:
Gene Therapy: Correcting genetic diseases like cystic fibrosis.
Agriculture: Engineering crops resistant to pests and harsh environments.
Research: Studying gene function to unlock new knowledge.
The Peril: Ethical concerns demand attention:
Off-target Effects: Unintended DNA edits can have unforeseen consequences.
Eugenics: Misusing CRISPR for designer babies raises social and ethical questions.
Equity: High costs could limit access to this potentially life-saving technology.
The Path Forward: Responsible development is crucial:
International Collaboration: Clear guidelines are needed for research and human trials.
Public Education: Open discussions ensure informed decisions about CRISPR.
Prioritize Safety and Ethics: Safety and ethical principles must be paramount.
CRISPR offers a powerful tool for a better future, but responsible development and addressing ethical concerns are essential. By prioritizing safety, fostering open dialogue, and ensuring equitable access, we can harness CRISPR's power for the benefit of all. (2998 characters)
Explore our infographic on 'Essential Metrics for Palliative Care Management' which highlights key performance indicators crucial for enhancing the quality and efficiency of palliative care services.
This visual guide breaks down important metrics across four categories: Patient-Centered Metrics, Care Efficiency Metrics, Quality of Life Metrics, and Staff Metrics. Each section is designed to help healthcare professionals monitor and improve care delivery for patients facing serious illnesses. Understand how to implement these metrics in your palliative care practices for better outcomes and higher satisfaction levels.
Defecation
Normal defecation begins with movement in the left colon, moving stool toward the anus. When stool reaches the rectum, the distention causes relaxation of the internal sphincter and an awareness of the need to defecate. At the time of defecation, the external sphincter relaxes, and abdominal muscles contract, increasing intrarectal pressure and forcing the stool out
The Valsalva maneuver exerts pressure to expel faeces through a voluntary contraction of the abdominal muscles while maintaining forced expiration against a closed airway. Patients with cardiovascular disease, glaucoma, increased intracranial pressure, or a new surgical wound are at greater risk for cardiac dysrhythmias and elevated blood pressure with the Valsalva maneuver and need to avoid straining to pass the stool.
Normal defecation is painless, resulting in passage of soft, formed stool
CONSTIPATION
Constipation is a symptom, not a disease. Improper diet, reduced fluid intake, lack of exercise, and certain medications can cause constipation. For example, patients receiving opiates for pain after surgery often require a stool softener or laxative to prevent constipation. The signs of constipation include infrequent bowel movements (less than every 3 days), difficulty passing stools, excessive straining, inability to defecate at will, and hard feaces
IMPACTION
Fecal impaction results from unrelieved constipation. It is a collection of hardened feces wedged in the rectum that a person cannot expel. In cases of severe impaction the mass extends up into the sigmoid colon.
DIARRHEA
Diarrhea is an increase in the number of stools and the passage of liquid, unformed feces. It is associated with disorders affecting digestion, absorption, and secretion in the GI tract. Intestinal contents pass through the small and large intestine too quickly to allow for the usual absorption of fluid and nutrients. Irritation within the colon results in increased mucus secretion. As a result, feces become watery, and the patient is unable to control the urge to defecate. Normally an anal bag is safe and effective in long-term treatment of patients with fecal incontinence at home, in hospice, or in the hospital. Fecal incontinence is expensive and a potentially dangerous condition in terms of contamination and risk of skin ulceration
HEMORRHOIDS
Hemorrhoids are dilated, engorged veins in the lining of the rectum. They are either external or internal.
FLATULENCE
As gas accumulates in the lumen of the intestines, the bowel wall stretches and distends (flatulence). It is a common cause of abdominal fullness, pain, and cramping. Normally intestinal gas escapes through the mouth (belching) or the anus (passing of flatus)
FECAL INCONTINENCE
Fecal incontinence is the inability to control passage of feces and gas from the anus. Incontinence harms a patient’s body image
PREPARATION AND GIVING OF LAXATIVESACCORDING TO POTTER AND PERRY,
An enema is the instillation of a solution into the rectum and sig
The dimensions of healthcare quality refer to various attributes or aspects that define the standard of healthcare services. These dimensions are used to evaluate, measure, and improve the quality of care provided to patients. A comprehensive understanding of these dimensions ensures that healthcare systems can address various aspects of patient care effectively and holistically. Dimensions of Healthcare Quality and Performance of care include the following; Appropriateness, Availability, Competence, Continuity, Effectiveness, Efficiency, Efficacy, Prevention, Respect and Care, Safety as well as Timeliness.
Empowering ACOs: Leveraging Quality Management Tools for MIPS and BeyondHealth Catalyst
Join us as we delve into the crucial realm of quality reporting for MSSP (Medicare Shared Savings Program) Accountable Care Organizations (ACOs).
In this session, we will explore how a robust quality management solution can empower your organization to meet regulatory requirements and improve processes for MIPS reporting and internal quality programs. Learn how our MeasureAble application enables compliance and fosters continuous improvement.
Global launch of the Healthy Ageing and Prevention Index 2nd wave – alongside...ILC- UK
The Healthy Ageing and Prevention Index is an online tool created by ILC that ranks countries on six metrics including, life span, health span, work span, income, environmental performance, and happiness. The Index helps us understand how well countries have adapted to longevity and inform decision makers on what must be done to maximise the economic benefits that comes with living well for longer.
Alongside the 77th World Health Assembly in Geneva on 28 May 2024, we launched the second version of our Index, allowing us to track progress and give new insights into what needs to be done to keep populations healthier for longer.
The speakers included:
Professor Orazio Schillaci, Minister of Health, Italy
Dr Hans Groth, Chairman of the Board, World Demographic & Ageing Forum
Professor Ilona Kickbusch, Founder and Chair, Global Health Centre, Geneva Graduate Institute and co-chair, World Health Summit Council
Dr Natasha Azzopardi Muscat, Director, Country Health Policies and Systems Division, World Health Organisation EURO
Dr Marta Lomazzi, Executive Manager, World Federation of Public Health Associations
Dr Shyam Bishen, Head, Centre for Health and Healthcare and Member of the Executive Committee, World Economic Forum
Dr Karin Tegmark Wisell, Director General, Public Health Agency of Sweden
CHAPTER 1 SEMESTER V PREVENTIVE-PEDIATRICS.pdfSachin Sharma
This content provides an overview of preventive pediatrics. It defines preventive pediatrics as preventing disease and promoting children's physical, mental, and social well-being to achieve positive health. It discusses antenatal, postnatal, and social preventive pediatrics. It also covers various child health programs like immunization, breastfeeding, ICDS, and the roles of organizations like WHO, UNICEF, and nurses in preventive pediatrics.
Medical Technology Tackles New Health Care Demand - Research Report - March 2...pchutichetpong
M Capital Group (“MCG”) predicts that with, against, despite, and even without the global pandemic, the medical technology (MedTech) industry shows signs of continuous healthy growth, driven by smaller, faster, and cheaper devices, growing demand for home-based applications, technological innovation, strategic acquisitions, investments, and SPAC listings. MCG predicts that this should reflects itself in annual growth of over 6%, well beyond 2028.
According to Chris Mouchabhani, Managing Partner at M Capital Group, “Despite all economic scenarios that one may consider, beyond overall economic shocks, medical technology should remain one of the most promising and robust sectors over the short to medium term and well beyond 2028.”
There is a movement towards home-based care for the elderly, next generation scanning and MRI devices, wearable technology, artificial intelligence incorporation, and online connectivity. Experts also see a focus on predictive, preventive, personalized, participatory, and precision medicine, with rising levels of integration of home care and technological innovation.
The average cost of treatment has been rising across the board, creating additional financial burdens to governments, healthcare providers and insurance companies. According to MCG, cost-per-inpatient-stay in the United States alone rose on average annually by over 13% between 2014 to 2021, leading MedTech to focus research efforts on optimized medical equipment at lower price points, whilst emphasizing portability and ease of use. Namely, 46% of the 1,008 medical technology companies in the 2021 MedTech Innovator (“MTI”) database are focusing on prevention, wellness, detection, or diagnosis, signaling a clear push for preventive care to also tackle costs.
In addition, there has also been a lasting impact on consumer and medical demand for home care, supported by the pandemic. Lockdowns, closure of care facilities, and healthcare systems subjected to capacity pressure, accelerated demand away from traditional inpatient care. Now, outpatient care solutions are driving industry production, with nearly 70% of recent diagnostics start-up companies producing products in areas such as ambulatory clinics, at-home care, and self-administered diagnostics.
The Importance of Community Nursing Care.pdfAD Healthcare
NDIS and Community 24/7 Nursing Care is a specific type of support that may be provided under the NDIS for individuals with complex medical needs who require ongoing nursing care in a community setting, such as their home or a supported accommodation facility.
3. Contents
1. Introduction
2. Terminology
3. Physiological functions
4. Sources of vitamin D
5. Status of vitamin D in Indian population
6. Vitamin D and non skeletal diseases
7. Conclusion
3
4. • Vitamin D has been traditionally known as anti-ricketic factor or
sunshine vitamin. Vitamin D is unique because it is a vitamin
synthesized by the body and it functions as a hormone
• Besides its pivotal role in calcium homeostasis and bone mineral
metabolism, vitamin D endocrine system in now recognized to
subserve a wide range of fundamental biological functions
• It is a steroid that regulates complex system of genomic functions and
has a role in prevention of neo plastic transformation
• Recent evidences from genetic, nutritional and epidemiological
studies link vitamin D endocrine system with diseases
• Vitamin D modulates the transcription of cell cycle proteins, which
decrease cell proliferation and increase cell differentiation of a number
of specialized cells of the body
4
Introduction
5. TERMINOLOGY
• Cholecalciferol is the naturally occurring form of vitamin D.
Cholecalciferol is made in large quantities in skin when its exposed to
sunlight (UV – B rays 290 to 310 nm)
• Calcidiol’s main importance is that it is the storage form of vitamin D.
Serum 25-hydroxyvitamin D [25(OH)D] is the most reliable indicator of
vitamin D adequacy of an individual and also depicts the status of
vitamin D stores of an individual.
• Calcitriol (1,25- dihydroxy-vitamin D) is made from calcidiol in both the
kidneys and in other tissues and is the most potent steroid hormone
derived from cholecalciferol.
5
7. PHYSIOLOGIC FUNCTIONS OF VITAMIN D
Vitamin D hormone functions to increase serum
calcium concentration through 3 separate activities
First, it is the only hormone known to
induce the proteins involved in active
intestinal calcium absorption.
Furthermore, it stimulates active intestinal
absorption of phosphate.
Second, blood calcium concentrations
remain in the normal range even when an
animal is placed on a no-calcium diet.
Therefore, an animal must possess the
ability to mobilize calcium in the absence of
calcium coming from the environment, ie.
through electrolytes
Third, the distal renal tubule is responsible
for reabsorption of the last1%of the filtered
load of calcium, and the 2 hormones
interact to stimulate the reabsorption of this
last 1% of the filtered load .
Because 7 g of calcium are filtered every
day among humans, this represents a
major contribution to the calcium pool.
Again, both parathyroid hormone and the
vitamin D hormone are required.
Deluca., 2004
7
8. Non-classic Actions of
Vitamin D
Bikle., 2009
The nonclassic actions of vitamin D can be categorized into
three general effects
Regulation of
hormone
secretion
Regulation
of immune
function
Regulation of
cellular
proliferation
and
differentiation
8
9. Regulation of hormone secretion
• 1,25(OH)2D inhibits the synthesis
and secretion of PTH and prevents
the proliferation of the parathyroid
gland
PTH
• 1,25(OH)2D stimulates insulin secretion,
although the mechanism is not well defined.
VDR and calbindin-D28k are found in
pancreatic cells and studies using calbindin-
D28k have suggested that calbindin-D28k, by
regulating intracellular calcium, can modulate
depolarization-stimulated insulin release
INSULIN
• FGF23 is produced primarily by bone,
particularly by osteoblasts and
osteocytes, 1,25(OH)2D3 stimulates
this process, but the mechanism is
not clear
FGF23
9
10. Fig 2: Regulation of immune function
Regulation of immune function by 1,25(OH)2D. 1,25(OH)2D suppresses adaptive immunity
(A) by inhibiting the maturation of dendritic cells
(B)the macrophage is activated
10
11. Regulation of cellular proliferation and
differentiation
Vitamin D secosteroids alter the growth and differentiation of numerous
normal and pathological cell types.
The antiproliferative effects of vitamin D compounds are the basis for
important therapies such as the systemic and topical treatment of
psoriasis and the suppression of parathyroid hyperplasia in chronic
renal failure.
Vitamin D secosteroids have been demonstrated in numerous
experimental animals to inhibit the growth of many types of cancers,
and exciting studies are in progress to explore the use of vitamin D
compounds in the treatment of human malignancies.
Differentiation of many cell types is stimulated by vitamin D through
induction of arrays of genes and stimulation of signal transduction
pathways. Antiproliferative effects of vitamin D compounds are often,
but not always, linked to promotion of cellular differentiation.
11
13. Sources of Vitamin D
Food sources
• oily fish – such as
salmon, sardines
and mackerel
• eggs
• fortified fat
spreads
• fortified breakfast
cereals
• Milk and some
powdered milks
• Orange juice
supplements
• capsules
• chewable tablets
• liquids
• drop
• Cod liver oil is a
good source of
vitamin D, but in
large doses there is
a risk of vitamin A
toxicity
Non food source
• sunlight
13
15. Puri et al ., 2008 Harinarayan et al ., 2013 Venkatesh et al., 2014
Subjects
LSES=211
USES=193
Age=6-18 yrs
Biochemical assessment
Serum calcium
Serum phosphorus
Physical activity profile
sun exposure
% of body surface area
exposed
Time spend outdoor activity
Usage of sunscreen
Sealed borosilicate glass
ampoules containing 50 μg
of 7-DHC in 1 ml of methanol
were exposed to sunlight
hourly from 8 a.m. until 4
p.m
The percent conversion of
7-DHC to previtamin D3 and
its photoproducts and the
percent of previtamin D3
and vitamin D3 formed was
estimated and related to
solar zenith angle
Weather reports collected
from newspaper
Data of the subjects
collected in three continuous
intervals.
Total 160 subjects were
identified as pre diabetes
based on inclusion and
exclusion criteria.
Age between 30 to 65 years
Subjects were assigned into
two groups based on
sunlight exposure.
All anthropometric and
metabolic parameters were
measured and interpreted.
METHODOLOGY
15
16. Kumar et al., 2011 Shah et al., 2013 Kumar et al., 2014
Participants 2079 low birth
weight infants born at term (>37
weeks’ gestation)
Interventions Weekly vitamin D
supplements for six months at a
dose of one recommended
nutrient intake per day (35
µg/week).
Weekly , observed
supplementation and were
brought to the clinic monthly for
clinical examination and
anthropometric measurements
Screening of serum vitamin
D of urban adults
N= 178 , age >18yrs
Subject with 25(OH)D levels
<30ng/ml enrolled and
supplemented with oral
cholecalciferol 60,000 IU
granules
follow up the estimation
25(OH)D at 60 days.
DIVIDS children
N= 446 from the vitamin D
N=466 from the placebo,
Data collected
Anthropometry
Blood pressure
Bone structure
Strength by quantitative
ultrasound (QUS)
Blood samples for
measurement of vitamin D
status
METHODOLOGY
16
17. Table 1. Characteristics, lifestyle and biochemical parameters of the
cohort (Mean values and standard deviations)
Parameters LSES (N=193) SD USES (N=211) SD
Serum calcium(mmol/l) 2.22 0.2 2.30 0.1
Serum phosphorus
(mmol/l)
1.48 0.25 1.35 0.22
25(OH)D (nmol/l) 34.61 ** 17.43 29.38 12.69
Daily sun exposure(%) 45 25
Body surface area
exposed (%)
28 15
Suns screen
application(%)
0 28
LSES, lower socioeconomic strata
USES, upper socioeconomic strata
Results of
Puri et al ., 2008
17
18. Table 2. Intake of food vitamin D of the LSES and USES
(Mean values and standard deviations)
18
DIET
VARIABLE
LSES(n193) USES(n211)
RDA Mean SD Mean SD
Vitamin D
(µg)
NA 1.5 1.3 2.8 1.4
19. 19
Solar zenith angle
The zenith angle is the
angle between the sun
and the vertical. The
zenith angle is similar
to the elevation angle
but it is measured
from the vertical
rather than from the
horizontal, thus
making the zenith
angle = 90° - elevation
20. Fig3: Showing the mean ± SD of the zenith angles, percent conversion of 7-
Dehydrocholesterol (7-DHC) to previtamin D3 and photoproducts, and the percentage of
previtamin D3 and vitamin D3 against time (for the study duration).
20
Results of
Harinarayana et al., 2013
21. 21
Figure 4: Graph showing the inverse correlation between the 25 (OH ) D levels
and latitude (r = -0.48; p < 0.0001) from various studies conducted in the
country .
22. 22
Fig 5: The 25 (OH ) D levels of various studies from India along with latitude and
location from various studies conducted in the country
23. pre diabetic group sunlight exposure per diabetic group
Male(43) Female (37 ) Male(49) Female (31) P Value
Hypertension
Primary 22(55.1%) 9(24%) 14(28%) 7(22%) p<0.05
Secondary 14(32.5%) 20(54%) 8(16.3%) 13(41.9%)
T2DM 34(79%) 28(75%) 24(48%) 17(54.8%) P<0.01
Dyslipidemia 14(32.5%) 18(48.6%) 15(30%) 13(41.9%) P>0.5(NS)
Table 3.Change in risk factors at the end of the visits between groups
Results of
Venkatesh et
al., 2014
23
24. Kumar et al., 2011 Shah et al., 2013 Kumar et al., 2015
Participants 2079 low birth
weight infants born at term (>37
weeks’ gestation)
Interventions Weekly vitamin D
supplements for six months at a
dose of one recommended
nutrient intake per day (35
µg/week).
Weekly , observed
supplementation and were
brought to the clinic monthly for
clinical examination and
anthropometric measurements
Screening of serum vitamin
D of urban adults
N= 178 , age >18yrs
Subject with 25(OH)D levels
<30ng/ml enrolled and
supplemented with oral
cholecalciferol 60,000 IU
granules
follow up the estimation
25(OH)D at 60 days.
DIVIDS children
N= 446 from the vitamin D
N=466 from the placebo,
Data collected
Anthropometry
Blood pressure
Bone structure
Strength by quantitative
ultrasound (QUS)
Blood samples for
measurement of vitamin D
status
METHODOLOGY
24
25. Variables
Vitamin D group
(n=216)
Placebo group
(n=237) P value
Mean (SD) calcidiol
level (nmol/L)
55.0 (22.5%) 36.0 (25.5%) <0.001
Type of deficiency:
Severe (<25
nmol/L)
18 (8%) 92 (39%) <0.001
Mild (10-20
nmol/L)
76 (35%) 82 (35%)
Adequate (>50
nmol/L)
122 (57%) 63 (2%)
Table 4. Effect of vitamin D supplementation on plasma calcidiol*
levels at six months. Values are numbers (percentages) unless stated
otherwise
*25-hydroxyvitamin D
Results of Kumar
et al.,2011
25
26. Fig. 6. Kaplan-Meier plot of time to admission to hospital or death of infants receiving
vitamin D supplementation or placebo
26
27. Table 5. Demographic profileResults of Shah
et al., 2013
Gender (n=178) No %
Male 58 32.58
Female 120 67.42
Age (yr) Mean =32.52 SD=7.5 Min. =19 Max =62
Table 6. Vitamin D 3 25(OH)D status at baseline (n=178)
Mean SD
Plasma 25(OH)D (ng/ml) 9.36 5.19
Range 2.90-28.73
Plasma vitamin D3 status No . %
Deficiency (<20 ng/ml) 169 99.94
Insufficiency (20-30ng/ml) 9 5.06
Sufficiency (>30-40 ng/ml) 0 0.00 27
28. Fig 7. Change in 25(OH)D levels at the
end of eight weeks with 60,000 IU
vitamin D (n = 178).
Fig 8. Subjects reaching 25(OH)D level
>20 ng/ml at the end of eight weeks.
28
29. 29
Result : Kumar et al., 2014
Body mass index were lower (adjusted P = 0.003) in the vitamin D Group
[1.18 (SD 0.92)] when compared with the placebo [1.02 (SD 0.91)] group
as a result of slightly lower weight and greater height.
The vitamin D group also had lower thigh circumference, arm muscle
area and slightly lower midupper arm circumference.
There were no group differences in body fat percentage, bone QUS or
blood pressure and few differences in motor development measures.
Vitamin D supplementation to lowbirth weight infants in infancy resulted
in children being thinner at age 36 years but no differences in functional
outcomes.
37. Mechanism of action vitamin D in diabetes
Other potential mechanisms associated with vitamin D and diabetes include improving
insulin action by stimulating expression of the insulin receptor, enhancing insulin
responsiveness for glucose transport, having an indirect effect on insulin action potentially
via a calcium effect on insulin secretion, and improving systemic inflammation by a direct
effect on cytokines.
β-cell in the pancreas that secretes insulin has been shown to contain VDRs as well as the 1
alpha hydroxylase enzyme.
Vitamin D deficiency leads to reduced insulin secretion. Supplementation with vitamin
D has been shown to restore insulin secretion in animals.
An indirect effect on insulin secretion, potentially by a calcium effect on insulin secretion.
Vitamin D contributes to normalization of extracellular calcium, ensuring normal calcium flux
through cell membranes; therefore, low vitamin D may diminish calcium’s ability to affect
insulin secretion.
37
38. Athanassiou et al ., 2013 Venkatesh et al., 2014 Laway et al., 2014
Glycosylated haemoglobin
(HbA1c) and 25(OH)D3 levels
were measured in a group of
120 diabetes mellitus type 2
patients.
The same measurements
were performed in a group of
120 control subjects of the
same age and sex.
25(OH)D3 was measured by
radioimmunoassay and
glycosylated haemoglobin
(HbA1c) was measured by
high-performance liquid
chromatography.
Data of the subjects collected
in three continuous intervals.
Total 160 subjects were
identified as pre diabetes
based on inclusion and
exclusion criteria.
Age between 30 to 65 years
Subjects were assigned into
two groups based on sunlight
exposure.
All anthropometric and
metabolic parameters were
measured and interpreted
N=102
newly detected T2D patients
similar number of age, body
mass index (BMI) and Gender
matched healthy controls
without diabetes.
Basic information
metabolic parameters and
serum 25 hydroxy vitamin D
(25HD)
Methodology
38
39. Table 10 . 25(OH)D3 (ng/ml) (mean ± SEM), HbA1c (%) (mean ±
SEM) in the diabetes mellitus type 2 patients and controls and
statistical significance (Student’s t-test)
Subjects HbA1c (%) mean ±
SEM
25(OH)D3 (ng/ml) mean
± SEM
25(OH)D3
≤ 10 ng/ml < 20 ng/ml
Patients (n = 120)
7.2±0.18 19.26±0.94 21 (17.5%) 76 (63.3%)
Controls (n = 120)
5.1±0.05 25.48±1.02 7 (5.8%) 28 (23.3%)
Statistical
significance p < 0.001 p < 0.001 p = 0.0089 p < 0.0001
Results of
Athanassiou et
al ., 2013
number and percentage of subjects with 25(OH)D3 deficiency and insufficiency [25(OH)D3
≤ 10 ng/ml and < 20 ng/ml] in the patient and control groups and statistical significance
(chi-squared test).
39
40. Fig 9. Inverse association between 25(OH)D3 (ng/ml) and HbA1c (%) in diabetes
mellitus type 2 patients, (p = 0.008, r2 = 0.058, linear regression analysis).
25(OH)D3, 25-hydroxy vitamin D3; HbA1c, glycosylated haemoglobin
40
41. Table11. Comparative analysis between the prediabetic and sun light
exposed group
Results of
Venkatesh et
al., 2014
COMPARISION SCORE (%) P VALUE
BMI 2.95 0.0309
Blood Glucose 10.54 p<0.0001
HbA1c 11.10 P<0.0001
Systolic BP 4.81 0.0042
Diastolic BP 1.09 0.2893(NS)
Cholesterol 4.41 0.0002
HDL 1.42 0.131(NS)
LDL 0.68 0.4735(NS)
TG 4.27 0.0019
Note : data represented as percentage(%). NS- not significant at p<0.05
41
42. Results of Laway
et al ., 2014
Table 12.Clinical and biochemical parameters of cases and healthy
controls
PARAMETER CASES CONTROLS P VALUE
Age(year) 45.95±7.56 45.79±6.17 0.871
BMI(Kg/m²) 24.35±3.72 24.31±3.02 0.925
Calcium
intake(mg/day)
972.62±299.43 1452.13±390.72 0.00
Sunlight exposer(%) 13.45±5.49 13.44±5.55 0.99
FPG(mgs/dl) 190.9±36 82.86±0.5 0.000
HbA 1c(%) 8.87±1.87 5.30±0.42 0.000
Vitamin D(ng/ml) 18.81±15.18 28.46±18.89 0.000
VD sufficiency(%) 18.6 33.3 0.002
VD insufficiency(%) 14.7 28.4 0.002
VD deficiency(%) 66.7 38.2 0.002
Mild VDD(%) 38.2 27.5 0.030
Moderate VDD(%) 45.6 70.0 0.525
Severe VDD(%) 16.2 2.5 0.525
42
43. Table 13. Comparison of clinical and biochemical parameters as per severity of vitamin D
deficiency
Deficiency
PARAMETER MILD(26) MODERATE(31) SEVERE(11) P VALUE
Age 47.00±8.96 47.10±6.56 46.36±7.58 0.96
Sex(M/F) 15/11 12/19 5/6 0.36
BMI(kg/m²) 24.49±3.53 23.92±4.14 23.12±3.61 0.57
HbA 1c(%) 8.60±2.01 9.29±1.94 8.90±2.45 0.46
Calcium (mgs/dl) 9.56±0.48 9.72±0.52 9.52±0.72 0.49
Phosphorus
(mg/dl)
3.86±0.40 3.37±0.55 3.25±0.58 0.10
ALP(U/L) 246.03±79.34 278.92±100.74 257.27±42.58 0.34
VitaminD (ng/ml) 14.95±3.06 7.66±1.39 3.56±1.04 0.00
43
Values are in mean―SD unless indicated. BMI: Body mass index; ALP:
Alkaline phosphatase. M/F: Male/Female
44. Cancer, also called malignancy, is an abnormal growth of
cells. There are more than 100 types of cancer, including
breast cancer, skin cancer, lung cancer, colon cancer, prostate
cancer, and lymphoma. Symptoms vary depending on the
type. Cancer treatment may include chemotherapy,
radiation, and/or surgery.
Cancer
44
45. Process of carcinogenesis
Initiation Promotion Progression
Neoplasia initiation is essentially
irreversible changes in appropriate
target somatic cells. In the simplest
terms, initiation involves one or
more stable cellular changes arising
spontaneously or induced by
exposure to a carcinogen. This is
considered to be the first step in
carcinogenesis, where the cellular
genome undergoes mutations,
creating the potential for
neoplastic development
The transformed (initiated)
cell can remain harmless,
unless and until it is
stimulated to undergo
further proliferation,
upsetting the cellular
balance. The subsequent
changes of an initiated cell
leading to neoplastic
transformation may involve
more than one step and
requires repeated and
prolonged exposures to
promoting stimuli
the process through which
successive changes in the
neoplasm give rise to
increasingly malignant sub-
populations. Molecular
mechanisms of tumor
progression are not fully
understood, but mutations
and chromosomal
aberrations are thought to
be involved.
45
46. Mechanism of action of vitamin D in cancer
Vitamin D via VDR directly alert patterns of gene expression and
can influence the outcome between proliferation, differentiation
or apoptosis, these genomic effects can be distinguish into
classical mechanism of VDR recruitment of co-activators on
VDREs and the non classical interaction with the activated beta
catenins on the other promoters.
VDR – Vitamin D Response/Receptors
VDREs – Vitamin D Response Elements
46
47. Figure 10: The renal endocrine pathway and the extrarenal autocrine or paracrine pathway
of calcitriol synthesis.
47
The role of vitamin D in reducing cancer risk and progression, Feldman et al., 2014
48. Figure 11: Calcitriol regulation of specific signalling pathways that drive breast,
colon and prostate cancer growth.
48
49. 49
METHODOLOGY
Skinner et al., 2006 Lappe et al., 2007 Garland et al.,2007
data pooled from two
cohort study
1). Nurses’ Health Study(F)
2). Health Professionals
Follow-up Study(M)
N= 121,701(F) & 51,529(M)
Questionnaires : dietary
assessment , smoking history ,
Pancreatic Cancer Case and
Death Ascertainment and
other information(in period of
two years )
Statistical Methods
Study period -4 yr
N = 1,179
Mean age - 66 yr
87.5% finished trial
Baseline serum 25(OH)D:
29 ± 8 ng/ml
Three treatment groups:
1). Vitamin D3 (1,100 IU/day)
and calcium (1450 mg/day)
2). Calcium (1,450 mg/day)
3). Placebo
Outcome: progression
towards all cancers (mainly
breast, lung and colon)
A literature search for all
studies that reported risk by of
breast cancer by quantiles of
25(OH)D identified two
studies with 1760 individuals.
Data were pooled to assess
the dose–response association
between serum 25(OH)D and
risk of breast cancer.
50. 50
Table 14. Age-standardized characteristics of men in the HPFS in 1986 and
women in the NHS in 1984 by total daily energy adjusted vitamin D intake
Variable Total daily vitamin D intake (IU)
<150 150-299 300-449 450-599 ≥600
HPFS (1986)
HPFS - Health Professionals Follow-up Study
MET- metabolic equivalent task.
No .men 10,783 15,321 7,528 5,062 8,077
Age (y) 52 54 54 55 56
Daily vitamin D(IU) 100 214 368 521 893
Body mass index(kg/m²) 25 25 25 25 25
Height (m) 1.8 1.8 1.8 1.8 1.8
Multivitamin supplement use 11% 22% 43% 79% 95%
Physical activity(METs/wk) 19 21 21 22 24
Smoking history
Current 12% 9% 9% 9% 8%
Former 45% 41% 39% 41% 42%
Never 40% 46% 48% 46% 46%
Result skinner
et al., 2006
51. 51
Table 15. Age-standardized characteristics women in the NHS in 1984 by total daily energy
adjusted vitamin D intake
Variable Total daily vitamin D intake (IU)
<150 150-299 300-449 450-599 ≥600NHS(1984)
NHS - Nurses’ Health Study , MET- metabolic equivalent task.
No .men 22,494 24,566 10,922 8,104 9,341
Age (y) 49 50 51 51 52
Daily vitamin D(IU) 95 212 368 522 829
Body mass index(kg/m²) 24 24 24 24 24
Height (m) 1.6 1.6 1.6 1.6 1.6
Multivitamin supplement
use(%)
8 17 56 88 94
Physical activity(METs/wk) 12 14 15 16 17
Smoking history
Current(%) 30 22 22 21 20
Former(%) 30 31 32 34 36
Never (%) 40 46 46 45 44
52. 52
Table16.: Total daily vitamin D intake and the risk for pancreatic cancer in the HPFS
and NHS cohorts
•All RRs are adjusted for age (1-year intervals) and total energy intake (kcal)
•Multivariate RRs additionally adjusted for cigarette smoking (current, former,
never),BMI
•Multivariate + multivitamin RRs are additionally adjusted for the use of multivitamin
supplements
53. 53
Table 17. vitamin D intake from food sources alone and the risk of pancreatic cancer in the
HPFS and NHS cohorts
All RRs were adjusted for age (1-year intervals) and total energy intake (kcal).
Multivariate RRs additionally adjusted for cigarette smoking (current, former,
never), body mass index.
54. 54
Year 1-4 year 2-4
Site Placebo
(n=288)
Calcium
only
(n=445)
Vit D &
calcium
(n=446)
Placebo
(n=266)
Calcium
only
(n=416)
Vitamin D
and
calcium
(403)
Breast(n) 8 6 5 7 6 4
Colon(n) 2 0 1 2 0 0
Lungs(n) 3 3 1 3 2 1
Lymph(n) 4 4 2 4 4 2
uterus 0 2 1 0 1 0
Other 3 2 3 2 2 1
Total(%) 20(6.9) 17(3.8) 13(2.9) 18(6.8) 15(3.6) 8(2.0)
Results of Lappe et al.,2007
Table 18. Cancers by primary site and by treatment assignment
n; percentage of total randomly assignment in each group who developed cancer
in parentheses
55. Fig .12 . Kaplan-Meier survival curves (ie, free of cancer), The survival at the end of study
for the Ca+D group is significantly higher than that for placebo, by logistic regression.
Sample sizes –
•placebo group-288
•calcium-only (Ca-
only) group- 445
•calcium plus
vitamin D (CaD)
group 446
55
56. Sample sizes –
• placebo group-
266
•calcium-only (Ca-
only) group -416
• calcium plus
vitamin D(CaD)
group- 403
logistic regression.
Fig 13. Kaplan-Meier survival curves (ie, free of cancer) for the 3
treatment groups randomly assigned in the cohort of women who
were free of cancer at 1 y of intervention (n 1085).
56
57. Fig 14. Dose–response gradient of risk of breast cancer according to prediagnostic
serum 25-hydroxyvitamin D concentration, Harvard Nurses’ Health
57
Results of Garland et al.,2007
58. Fig. 15. Dose–response gradient of risk of breast cancer according to serum
25-hydroxyvitamin D concentration, St. George’s Hospital, London, study
58
59. Fig 16. Dose–response gradient of risk of breast cancer according to serum
25-hydroxyvitamin D concentration, pooled analysis
59
60. Gaps in understanding !!!
60
No standard in India to define vitamin D deficiency. Lack of standards can lead to
overestimation of the prevalence of the deficiency and irrational use of vitamin D
supplements
No study to estimate how much vitamin D is adequate for Indians, who receive ample
sunlight
No understanding on why there is enough vitamin D produced in some and not in others
even though their exposure to sunlight is the same
No study in India to gauge how much vitamin D-producing UVB rays reach the ground
and whether air pollution blocks it.
No study on how toxins affect the production or absorption of vitamin D in the body
No study showing if sunscreen and skin-lightening products impair vitamin D
production
61. Conclusion
Vitamin D deficiency is of concern now a days, it has important role in skeletal
and non skeletal functions of the body. Good sunlight exposure, consumption
of vitamin D rich foods, chemotherapy with vitamin D and supplements of
vitamin D has shown positive effect on various non skeletal diseases like
cancer, diabetes, diarrhoea, tuberculosis etc. Although Indians are blessed with
ample sunlight, still 70 to 100% population is suffering from the vitamin D
deficiency. Vitamin D deficiency is likely to play an important role in the very
high prevalence of rickets, osteoporosis, cardiovascular diseases, diabetes,
cancer and infections such as tuberculosis in India. Fortification of staple foods
with vitamin D is the most viable population based strategy to achieve vitamin
D sufficiency. Unfortunately, even in advanced countries like USA and Canada,
food fortification strategies with vitamin D have been only partially effective
and have largely failed to attain vitamin D sufficiency
61