This study investigated how estradiol regulates memory and brain energy metabolism in female rats. Researchers measured glucose and lactate levels in the cerebrospinal fluid of ovariectomized rats treated with either estradiol or an oil vehicle. They found that estradiol treatment lowered basal glucose levels but raised basal lactate levels compared to oil treatment, indicating estradiol shifts brain energy substrates from glucose to lactate. The results suggest lactate serves as an important energy source for memory processes regulated by estradiol. Future studies will examine how estradiol impacts hippocampal glucose and lactate responses during memory tasks.
Remodeling of Pancreatic Innervation in DiabetesInsideScientific
The pancreas is densely innervated, and neural signals play a significant role in glucose regulation by modulating pancreatic hormone release. However, relatively little is known about the anatomical relationships between islets and nerves across the whole pancreas. In this webinar, Dr. Sarah Stanley and Dr. Alexandra Alvarsson will discuss their research using tissue clearing and whole organ imaging of the pancreas to identify the 3D structure of pancreatic nerves and islets.
In particular, they will provide an overview of their methodology, which provides detailed information and quantification of pancreatic innervation in healthy pancreas, in canonical models of diabetes and in samples from nondiabetic and diabetic donors. They will also present their findings, demonstrating greatly enriched innervation in the islets with regional variations. They will also discuss beta cell innervation in mouse models of diabetes and in pancreata from human donors with type 2 diabetes.
Key Topics Include:
- Tissue clearing and 3D imaging to allow the mapping of nerves in peripheral organs
- Innervation of peripheral organs such as the pancreas
- How pancreatic nerves are remodeled in diabetes
The IOSR Journal of Pharmacy (IOSRPHR) is an open access online & offline peer reviewed international journal, which publishes innovative research papers, reviews, mini-reviews, short communications and notes dealing with Pharmaceutical Sciences( Pharmaceutical Technology, Pharmaceutics, Biopharmaceutics, Pharmacokinetics, Pharmaceutical/Medicinal Chemistry, Computational Chemistry and Molecular Drug Design, Pharmacognosy & Phytochemistry, Pharmacology, Pharmaceutical Analysis, Pharmacy Practice, Clinical and Hospital Pharmacy, Cell Biology, Genomics and Proteomics, Pharmacogenomics, Bioinformatics and Biotechnology of Pharmaceutical Interest........more details on Aim & Scope).
Neuroprotective Roles of Oleic Acid: An Antioxidant Status and Cerebellar Cha...semualkaira
This study is aimed at investigating cellular and metabolic changes within the cerebellum in rat models of AD, while
assessing the neuroprotective mechanisms of oleic acid (OA) on
the corresponding pathology.
Neuroprotective Roles of Oleic Acid: An Antioxidant Status and Cerebellar Cha...semualkaira
Previous studies have linked Alzheimer’s disease (AD) with cerebellar dysfunction. However, these studies
lack substantial cerebellar characterization and features during AD
progression.
Neuroprotective Roles of Oleic Acid: An Antioxidant Status and Cerebellar Cha...semualkaira
Previous studies have linked Alzheimer’s disease (AD) with cerebellar dysfunction. However, these studies
lack substantial cerebellar characterization and features during AD
progression.
It appears that you have provided information about the "Indo-American Journal of Agricultural and Veterinary Sciences" . This journal seems to be an international online publication in English, published quarterly. It emphasizes fast publication while maintaining a rigorous peer-review process of the published journals.
From Pregnancy to Menopause: Studies of Physical Activity, Behavior, and Ener...InsideScientific
Join Sharon Ladyman, PhD and Vicki Vieira-Potter, PhD as they present applications of rodent metabolic phenotyping with a focus on the effects of hormones and pregnancy on daily activity in mice.
A reduction in voluntary physical activity during pregnancy in mice is mediated by prolactin
Sharon Ladyman, PhD
Pregnancy is an energetically demanding challenge for the mother and as such, pregnant females undergo numerous metabolic adaptations to meet these demands, including increased food intake and a rapid lowering of energy expenditure and physical activity levels. A particularly striking example is a profound reduction in voluntary running wheel activity (RWA) that occurs as soon as mice become pregnant. We hypothesized that prolactin, one of the first hormones to increase in response to mating in rodents, drives the pregnancy-induced suppression of physical activity levels.
Neuronal and Metabolic Pathways Influenced by Sex Hormones
Vicki Vieira-Potter, PhD
Estrogen-sufficient females are more physically active than males and are protected against adipose tissue and systemic metabolic dysfunction. The mechanisms are not fully understood, but we demonstrate that ovarian removal causes significant mRNA changes in the nucleus accumbens (NAc) brain region (i.e., the reward center), which correlate significantly with physical inactivity. We hypothesize that sex differences in the NAc may help explain differences in physical activity and metabolism.
Characterization of jec absorbed compounds in lactating rat's milk and suckli...Norhafilda Ismail
Jamu Ratus, a widespread use of traditional complementary herbal remedies upon post-partum recovery. The herbal remedies constituents may comprising abundance of herbs and spices namely Piper sp., Alpinia sp., Kaempferia galangal, Curcuma sp. which representing the complexity of herbal formulas and the presence of ubiquitous of bioactive compounds. Preliminary studies has been conducted using different concentrations of therapeutic dosages as given; 0mg/kg/day as control; 150mg/kg/day; 500mg/kg/day and 1500mg/kg/day in lactating rat’s milk and suckling neonates after giving birth within 1 month upon gestation period. The main objectives is to characterize the absorbed of JEC compounds derived from ethanolic fractions compounds using lactating’ rats milks and plasma tissues from liver and brain’s (n=30) of suckling neonates. The subjected samples tested were collected, weighed and further analysed using Thin Layer Chromatography (TLC); High Performance of Chromatography (HPLC) and Liquid Chromatography Mass Spectrometry (LCMS) using different phase of solvent as eluents. The presence of flavonoids compounds even at lower dosage of therapeutic dosage (150mg/kg/day) given in neonatal tissues brain persistent with time and dosage given; giving good insight in understanding of xenobiotic metabolism in the liver. The bioaccumulation of absorbed JEC compounds in neonatal brain and liver tissues showing the bioavailability of the drug itself to retain, persistent with time of drug exposure. Albeit the vulnerability of the neonatal liver and brain in early stage development upon drug interference to transverse into the brain tissues; thus, implicated the toxicity potential whilst exhibits and affecting cognitive development and physiological activities and henceforth need to be further resolved.
Key Words;, JEC compounds, xenobiotic , TLC, HPLC and LCMS.
Characterization of jec absorbed compounds in lactating rat's milk and suckli...Norhafilda Ismail
Jamu Ratus, a widespread use of traditional complementary herbal remedies upon post-partum recovery. The herbal remedies constituents may comprising abundance of herbs and spices namely Piper sp., Alpinia sp., Kaempferia galangal, Curcuma sp. which representing the complexity of herbal formulas and the presence of ubiquitous of bioactive compounds. Preliminary studies has been conducted using different concentrations of therapeutic dosages as given; 0mg/kg/day as control; 150mg/kg/day; 500mg/kg/day and 1500mg/kg/day in lactating rat’s milk and suckling neonates after giving birth within 1 month upon gestation period. The main objectives is to characterize the absorbed of JEC compounds derived from ethanolic fractions compounds using lactating’ rats milks and plasma tissues from liver and brain’s (n=30) of suckling neonates. The subjected samples tested were collected, weighed and further analysed using Thin Layer Chromatography (TLC); High Performance of Chromatography (HPLC) and Liquid Chromatography Mass Spectrometry (LCMS) using different phase of solvent as eluents. The presence of flavonoids compounds even at lower dosage of therapeutic dosage (150mg/kg/day) given in neonatal tissues brain persistent with time and dosage given; giving good insight in understanding of xenobiotic metabolism in the liver. The bioaccumulation of absorbed JEC compounds in neonatal brain and liver tissues showing the bioavailability of the drug itself to retain, persistent with time of drug exposure. Albeit the vulnerability of the neonatal liver and brain in early stage development upon drug interference to transverse into the brain tissues; thus, implicated the toxicity potential whilst exhibits and affecting cognitive development and physiological activities and henceforth need to be further resolved.
Key Words;, JEC compounds, xenobiotic , TLC, HPLC and LCMS.
Remodeling of Pancreatic Innervation in DiabetesInsideScientific
The pancreas is densely innervated, and neural signals play a significant role in glucose regulation by modulating pancreatic hormone release. However, relatively little is known about the anatomical relationships between islets and nerves across the whole pancreas. In this webinar, Dr. Sarah Stanley and Dr. Alexandra Alvarsson will discuss their research using tissue clearing and whole organ imaging of the pancreas to identify the 3D structure of pancreatic nerves and islets.
In particular, they will provide an overview of their methodology, which provides detailed information and quantification of pancreatic innervation in healthy pancreas, in canonical models of diabetes and in samples from nondiabetic and diabetic donors. They will also present their findings, demonstrating greatly enriched innervation in the islets with regional variations. They will also discuss beta cell innervation in mouse models of diabetes and in pancreata from human donors with type 2 diabetes.
Key Topics Include:
- Tissue clearing and 3D imaging to allow the mapping of nerves in peripheral organs
- Innervation of peripheral organs such as the pancreas
- How pancreatic nerves are remodeled in diabetes
The IOSR Journal of Pharmacy (IOSRPHR) is an open access online & offline peer reviewed international journal, which publishes innovative research papers, reviews, mini-reviews, short communications and notes dealing with Pharmaceutical Sciences( Pharmaceutical Technology, Pharmaceutics, Biopharmaceutics, Pharmacokinetics, Pharmaceutical/Medicinal Chemistry, Computational Chemistry and Molecular Drug Design, Pharmacognosy & Phytochemistry, Pharmacology, Pharmaceutical Analysis, Pharmacy Practice, Clinical and Hospital Pharmacy, Cell Biology, Genomics and Proteomics, Pharmacogenomics, Bioinformatics and Biotechnology of Pharmaceutical Interest........more details on Aim & Scope).
Neuroprotective Roles of Oleic Acid: An Antioxidant Status and Cerebellar Cha...semualkaira
This study is aimed at investigating cellular and metabolic changes within the cerebellum in rat models of AD, while
assessing the neuroprotective mechanisms of oleic acid (OA) on
the corresponding pathology.
Neuroprotective Roles of Oleic Acid: An Antioxidant Status and Cerebellar Cha...semualkaira
Previous studies have linked Alzheimer’s disease (AD) with cerebellar dysfunction. However, these studies
lack substantial cerebellar characterization and features during AD
progression.
Neuroprotective Roles of Oleic Acid: An Antioxidant Status and Cerebellar Cha...semualkaira
Previous studies have linked Alzheimer’s disease (AD) with cerebellar dysfunction. However, these studies
lack substantial cerebellar characterization and features during AD
progression.
It appears that you have provided information about the "Indo-American Journal of Agricultural and Veterinary Sciences" . This journal seems to be an international online publication in English, published quarterly. It emphasizes fast publication while maintaining a rigorous peer-review process of the published journals.
From Pregnancy to Menopause: Studies of Physical Activity, Behavior, and Ener...InsideScientific
Join Sharon Ladyman, PhD and Vicki Vieira-Potter, PhD as they present applications of rodent metabolic phenotyping with a focus on the effects of hormones and pregnancy on daily activity in mice.
A reduction in voluntary physical activity during pregnancy in mice is mediated by prolactin
Sharon Ladyman, PhD
Pregnancy is an energetically demanding challenge for the mother and as such, pregnant females undergo numerous metabolic adaptations to meet these demands, including increased food intake and a rapid lowering of energy expenditure and physical activity levels. A particularly striking example is a profound reduction in voluntary running wheel activity (RWA) that occurs as soon as mice become pregnant. We hypothesized that prolactin, one of the first hormones to increase in response to mating in rodents, drives the pregnancy-induced suppression of physical activity levels.
Neuronal and Metabolic Pathways Influenced by Sex Hormones
Vicki Vieira-Potter, PhD
Estrogen-sufficient females are more physically active than males and are protected against adipose tissue and systemic metabolic dysfunction. The mechanisms are not fully understood, but we demonstrate that ovarian removal causes significant mRNA changes in the nucleus accumbens (NAc) brain region (i.e., the reward center), which correlate significantly with physical inactivity. We hypothesize that sex differences in the NAc may help explain differences in physical activity and metabolism.
Characterization of jec absorbed compounds in lactating rat's milk and suckli...Norhafilda Ismail
Jamu Ratus, a widespread use of traditional complementary herbal remedies upon post-partum recovery. The herbal remedies constituents may comprising abundance of herbs and spices namely Piper sp., Alpinia sp., Kaempferia galangal, Curcuma sp. which representing the complexity of herbal formulas and the presence of ubiquitous of bioactive compounds. Preliminary studies has been conducted using different concentrations of therapeutic dosages as given; 0mg/kg/day as control; 150mg/kg/day; 500mg/kg/day and 1500mg/kg/day in lactating rat’s milk and suckling neonates after giving birth within 1 month upon gestation period. The main objectives is to characterize the absorbed of JEC compounds derived from ethanolic fractions compounds using lactating’ rats milks and plasma tissues from liver and brain’s (n=30) of suckling neonates. The subjected samples tested were collected, weighed and further analysed using Thin Layer Chromatography (TLC); High Performance of Chromatography (HPLC) and Liquid Chromatography Mass Spectrometry (LCMS) using different phase of solvent as eluents. The presence of flavonoids compounds even at lower dosage of therapeutic dosage (150mg/kg/day) given in neonatal tissues brain persistent with time and dosage given; giving good insight in understanding of xenobiotic metabolism in the liver. The bioaccumulation of absorbed JEC compounds in neonatal brain and liver tissues showing the bioavailability of the drug itself to retain, persistent with time of drug exposure. Albeit the vulnerability of the neonatal liver and brain in early stage development upon drug interference to transverse into the brain tissues; thus, implicated the toxicity potential whilst exhibits and affecting cognitive development and physiological activities and henceforth need to be further resolved.
Key Words;, JEC compounds, xenobiotic , TLC, HPLC and LCMS.
Characterization of jec absorbed compounds in lactating rat's milk and suckli...Norhafilda Ismail
Jamu Ratus, a widespread use of traditional complementary herbal remedies upon post-partum recovery. The herbal remedies constituents may comprising abundance of herbs and spices namely Piper sp., Alpinia sp., Kaempferia galangal, Curcuma sp. which representing the complexity of herbal formulas and the presence of ubiquitous of bioactive compounds. Preliminary studies has been conducted using different concentrations of therapeutic dosages as given; 0mg/kg/day as control; 150mg/kg/day; 500mg/kg/day and 1500mg/kg/day in lactating rat’s milk and suckling neonates after giving birth within 1 month upon gestation period. The main objectives is to characterize the absorbed of JEC compounds derived from ethanolic fractions compounds using lactating’ rats milks and plasma tissues from liver and brain’s (n=30) of suckling neonates. The subjected samples tested were collected, weighed and further analysed using Thin Layer Chromatography (TLC); High Performance of Chromatography (HPLC) and Liquid Chromatography Mass Spectrometry (LCMS) using different phase of solvent as eluents. The presence of flavonoids compounds even at lower dosage of therapeutic dosage (150mg/kg/day) given in neonatal tissues brain persistent with time and dosage given; giving good insight in understanding of xenobiotic metabolism in the liver. The bioaccumulation of absorbed JEC compounds in neonatal brain and liver tissues showing the bioavailability of the drug itself to retain, persistent with time of drug exposure. Albeit the vulnerability of the neonatal liver and brain in early stage development upon drug interference to transverse into the brain tissues; thus, implicated the toxicity potential whilst exhibits and affecting cognitive development and physiological activities and henceforth need to be further resolved.
Key Words;, JEC compounds, xenobiotic , TLC, HPLC and LCMS.
2.a OPTIMIZATION CHARACTERIZATION OF JEC ABSORBED COMPOUNDS IN LACTATING RATS...
Estrogen Research poster Final
1. Thinking Big: Estradiol Regulates Memory and Bioenergetics
K. Bell1, W. Wang2, P.E Gold3, D.L Korol4
Department of Biology, Syracuse University, Syracuse, NY, USA
Introduction
Background and Rational
Methods Zero-Net Flux
Discussion
References
Lactate metabolism, an important energy pathway
involved in memory consolidation, is determined to
be mediated by estrogens in female Rats. In this
experiment we have measured the glucose and
lactate responses in the cerebrospinal fluid from the
ventral hippocampus of ovariectomized rats treated
with injections of either estradiol or oil vehicle. with
estradiol or oil vehicle.
Experimental Timeline
Estrogens shift cognitive strategies
• Rats with high estrogen levels excel on hippocampus-based tasks
and rats with low estrogen levels do poorly on hippocampus-
sensitive tasks (Korol, 2004).
Estrogens regulate bioenergetics
• Estrogens may shift energy substrates in the brain from glucose
to other sources such as lactate (Yao, 2012).
Neurons use extracellular glucose or astrocytic lactate
• Neurons can use glucose or lactate for energy, both of which
originate from circulating glucose. Glucose from the blood is
either consumed by neurons or astrocytes. Astrocytes either
store glucose as glycogen, which can then be broken down into
lactate, or convert glucose directly to lactate; lactate is then
shuttled to the neurons for further catabolism and production of
ATP.
Lactate is important for spatial working memory
• We and others have previously shown in male rats that blocking
lactate entry into hippocampal neurons impairs memory and
infusing lactate into the hippocampus enhances memory.
Inhibition of glial glycogenolysis also impairs memory
(Newman, 2011), pointing to lactate as an important contributor
to normal memory function.
Subjects
Female Sprague Dawley rats (n= 15-20, 3 months old) were
housed separately with free access to food and water, and
were kept on a 12:12 light: dark cycle.
Surgeries
• Rats were anesthized with 5.0% Isoflurane for 10 minutes
prior to beginning ovariectomy. Surgery began with
administering 3.5% inhalation dosage of Isoflurane,
0.09mL Penicillin, flunoxin (.001% of measured body
weight) and 1mL of 0.9% Saline.
• One week following ovariectomy, Cannula implantation
(CMA cannula: out diameter 0.8mm) with a biosensor
probe (CMA12 probe 20kDa cutoff) was inserted into the
hippocampus to measure estrogen, and lactate levels.
Treatments
• Oil Vehicle : 0.5 µg/kg infused bilaterally into the ventral
hippocampus
• Estradiol infusion: 4.5µg/kg and 45µg/kg of 17β-estradiol
infused bilaterally into the ventral hippocampus at 24 and
48 hours before any additional testing or training.
Testing
Microdialysis:
• Subjects received a biosensor probe perfused with
artificial cerebral spinal fluid of a known glucose
concentration in the range of 0-2.0mM, with a flow rate of
1µL/min.
Graph A: The perfusate glucose or lactate concentration at
which there is no net concentration change is the point of
zero flux.
Expected Results
Graph B: ZNF linear plot of basal level glucose concentrations in
estradiol (1.0mM) and oil vehicle (0.5mM) treated rats. Each point
represents data from one rat.
Graph C: ZNF linear plot of basal lactate concentrations in oil
vehicle (1.0mM) and estradiol (0.5mM) treated rats. Values are
reciprocals of glucose concentrations.
Graph D: Represents studied and expected extracellular
Glucose and Lactate concentrations. Glucose and Lactate
Concentrations Change Reciprocally During SA (Newman et
al., 2011).
Histology
• Brains were sectioned at 40µm through the hippocampus
on a cryostat and stained with cresyl violet.
• Vaginal smears were taken for 8 days prior to training to
ensure successful ovariectomy and estradiol injections.
Vaginal smears were stained with Toluidine Blue for
staging.
Future Directions
We will test estradiol effects on the hippocampal glucose and
lactate response to place learning, which is a task that may
selectively engage the hippocampus
• Newman et al. (2011). Lactate Produced by Glycogenolysis in
Astrocytes Regulates Memory. PLoS ONE 6(12): e28427.
• Korol, D.L. (2004). Role of estrogen in balancing contributions
from multiple memory systems. Neurobiology of Learning and
Memory, 82, 309-323.
• Jia Yao et al. (2012). Ovarian hormone loss induces bioenergetic
deficits and mitochondrial β-amyloid. Neurobiology of Aging ,
1507–1521.
• Fan Ding et al. (2013). Ovariectomy induces a shift in fuel
availability and metabolism in the hippocampus of the female
transgenic model of familial Alzheimer’s. PLoS
ONE. 2013;8(3):e59825.
• Chuquet et al. (2010). Predominant enhancement of glucose
uptake in astrocytes versus neurons during activation of the
somatosensory cortex. J Neurosci. 2010 Nov 10;30(45):15298-
303.
• We expect the measured glucose concentration to be
less in oil treated rats, as opposed to rats treated
with estradiol.
• Basal lactate levels were opposite to that of glucose
concentrations indicating that lactate could be
another possible substrate to power metabolic
processes. However, it is also possible that glucose
and lactate levels can both be decreased, which
indicates the complete impairment of estrogens in
the rats brain involved in bioenergetics.
Acknowledgments
Funding for this project was provided by NSF IOS 0843175 and IOS
1318490 and by Syracuse University.