The document discusses stem cells and their potential medical applications. It defines two main types of stem cells - tissue-specific stem cells which are multipotent and can only form certain cell types, and pluripotent stem cells (embryonic and induced pluripotent) which can form any cell type. Tissue-specific stem cells are found throughout the body and already used to treat conditions like leukemia. Pluripotent stem cells have greater potential but also more challenges, as embryonic stem cells require embryo destruction and induced pluripotent stem cells are difficult to create reliably. Overall stem cells may help develop more individualized regenerative and personalized medical treatments.
If the cell is able to form all cell types of the embryo & adult (Fertilized egg cell) Totipotent stem cell
Stem cell able to differentiate into all 3 germ layers Pluripotent stem cell (Embryonic stem cell)
Multipotent stem cell Differentiate to form cells of some but not all 3 germ layers (Bone, cartilage, connective tissue)
Unipotent stem cell Able to form just one other cell type (Spermatogonia)
Embryos created in vitro fertilization
Aborted embryos
Limited tissues (bone marrow, muscle, brain)
Discrete populations of adult stem cells generate replacements for cells that are lost through normal wear and tear, injury or disease
Placental cord
Baby teeth
Diabetes patients lose the function of their insulin-producing beta cells of the pancreas
Human embryonic stem cells may be grown in cell cultures and stimulate to form insulin-producing cells , that can be transplanted into the patients
Pancreas is digested with collagenase that frees islets from surrounding cells
Centrifugation of isolates containing mainly alpha and beta cells, purified islets beta cells
Transplanted through a catheter into the liver where they become permanently established Caused when key brain cells that produce message carrying chemical/neurotransmitter (dopamine) die off.
Symptoms start with the patients trembling and can end up paralyzed
Harvesting of stem cells from patients bone marrow, foetus or any other source
Culturing of harvested stem cells in lab conditions - to get high concentrations of stem cells
Then purified and high concentration of stem cells are surgically injected in the brain of patient.
“Stem Cell, Possibilities And Utility In Health sector” Ajit Tiwari
The role of stem cells in basic biological processes in vivo, namely in development, tissue repair and cancer.
Remarkable progress has been achieved in studying stem cells. The most exciting use of cultured stem cells is the promise for curing many devastating diseases like Parkinson's and diabetes. However, more basic research remains before stem-cell based therapy is widely used.
ES cells have the most capacity to differentiate into a variety of cells and their proliferation capacity is also unsurpassed by any other cell type. There are three major problems with ES cells; ethical issues, immunological rejection problems and the potential of developing teratomas.
In the future, ideally, somatic stem cells from the patient will be extracted and manipulated and then reintroduced into the same patient to cure debilitating diseases.
Stem cells:A topic related to genetics
Slides cover all the aspects of stem cells
Classification of stem cells
Location of stem cells in Human body
Uses of stem cells in the treatment of diseases
Characteristics of stem cells
Basic terms related to stem cells
1. Definition
2. History
3. Discrimination of stem cells from other types of cells
4. Types
5. Why stem cells are important
6. Properties
7. Application of stem cells
8. Advantages and disadvantages
If the cell is able to form all cell types of the embryo & adult (Fertilized egg cell) Totipotent stem cell
Stem cell able to differentiate into all 3 germ layers Pluripotent stem cell (Embryonic stem cell)
Multipotent stem cell Differentiate to form cells of some but not all 3 germ layers (Bone, cartilage, connective tissue)
Unipotent stem cell Able to form just one other cell type (Spermatogonia)
Embryos created in vitro fertilization
Aborted embryos
Limited tissues (bone marrow, muscle, brain)
Discrete populations of adult stem cells generate replacements for cells that are lost through normal wear and tear, injury or disease
Placental cord
Baby teeth
Diabetes patients lose the function of their insulin-producing beta cells of the pancreas
Human embryonic stem cells may be grown in cell cultures and stimulate to form insulin-producing cells , that can be transplanted into the patients
Pancreas is digested with collagenase that frees islets from surrounding cells
Centrifugation of isolates containing mainly alpha and beta cells, purified islets beta cells
Transplanted through a catheter into the liver where they become permanently established Caused when key brain cells that produce message carrying chemical/neurotransmitter (dopamine) die off.
Symptoms start with the patients trembling and can end up paralyzed
Harvesting of stem cells from patients bone marrow, foetus or any other source
Culturing of harvested stem cells in lab conditions - to get high concentrations of stem cells
Then purified and high concentration of stem cells are surgically injected in the brain of patient.
“Stem Cell, Possibilities And Utility In Health sector” Ajit Tiwari
The role of stem cells in basic biological processes in vivo, namely in development, tissue repair and cancer.
Remarkable progress has been achieved in studying stem cells. The most exciting use of cultured stem cells is the promise for curing many devastating diseases like Parkinson's and diabetes. However, more basic research remains before stem-cell based therapy is widely used.
ES cells have the most capacity to differentiate into a variety of cells and their proliferation capacity is also unsurpassed by any other cell type. There are three major problems with ES cells; ethical issues, immunological rejection problems and the potential of developing teratomas.
In the future, ideally, somatic stem cells from the patient will be extracted and manipulated and then reintroduced into the same patient to cure debilitating diseases.
Stem cells:A topic related to genetics
Slides cover all the aspects of stem cells
Classification of stem cells
Location of stem cells in Human body
Uses of stem cells in the treatment of diseases
Characteristics of stem cells
Basic terms related to stem cells
1. Definition
2. History
3. Discrimination of stem cells from other types of cells
4. Types
5. Why stem cells are important
6. Properties
7. Application of stem cells
8. Advantages and disadvantages
Babycell started its humble beginning in the year 2009 under the guidance of Mr. Yash Sanghavi, a veteran in the healthcare industry. During the time, stem cell preservation was still an unknown concept to many. People were unaware of the amazing results that could be achieved with the help of stem cells from the
umbilical cord
Stem cells are the promising cells that are capable to differentiate into any deserved cell type. By using stem cells we can generate tissues and even organs that can be used in multiple disciplines as drug testing, as a source used for organ transplantation...etc.
Stem Cell Therapy Clinical Trial at Patients MedicalPatients Medical
Dr. Kamau Kokayi from the New York Stem Cell Treatment Center at Patients Medical gives the latest information on the amazing discoveries and healing capacity of stem cells and details on enrolling in the current clinical trial at NYSCTC.
Dr. Steenblock treats patients suffering from Macular Degeneration using Stem Cell Treatments. Contact his office today at 1-800-300-1063. Websites:
www.stemcellmd.org
www.strokedoctor.com
www.stemcelltherapies.org
www.cerebralpalsycure.com
www.davidsteenblock.com
www.davidsteenblock.net
Babycell started its humble beginning in the year 2009 under the guidance of Mr. Yash Sanghavi, a veteran in the healthcare industry. During the time, stem cell preservation was still an unknown concept to many. People were unaware of the amazing results that could be achieved with the help of stem cells from the
umbilical cord
Stem cells are the promising cells that are capable to differentiate into any deserved cell type. By using stem cells we can generate tissues and even organs that can be used in multiple disciplines as drug testing, as a source used for organ transplantation...etc.
Stem Cell Therapy Clinical Trial at Patients MedicalPatients Medical
Dr. Kamau Kokayi from the New York Stem Cell Treatment Center at Patients Medical gives the latest information on the amazing discoveries and healing capacity of stem cells and details on enrolling in the current clinical trial at NYSCTC.
Dr. Steenblock treats patients suffering from Macular Degeneration using Stem Cell Treatments. Contact his office today at 1-800-300-1063. Websites:
www.stemcellmd.org
www.strokedoctor.com
www.stemcelltherapies.org
www.cerebralpalsycure.com
www.davidsteenblock.com
www.davidsteenblock.net
Induced Pluripotent Stem Cell & Cell Dedifferentiation: The Breakthrough of S...Vincentsia Vienna
The phenomenon of cell dedifferentiation is yet one promising trend to explore. In future, the science fiction of regenerative medicine could be turned into reality.
Stem cells are special human cells that have the ability to develop into many different cell types, from muscle cells to brain cells. In some cases, they also have the ability to repair damaged tissues.
Blood production agency. all types of blood cellls are produced in it. to understand it is the need of this era. it also will help in the physiology of blood making mechanism.
The complete, compiled presentation on stem cell research. The contents include background history along with the introduction, different stem cell types, cultivation process, stem cell cloning and potential uses, the negative aspects and ethical concerns regarding stem cell therapy. Different examples of the useful work in stem cell therapy field has also been mentioned.
Stem cells
Undifferentiated cells capable of self-renew and to differentiate into different cell types or tissues during embryonic development and throughout adulthood.
Have possibility to become a specialised cell.
Have the ability to divide continuously and develop into various other kinds of cells.
Have immune potential and can help to treat a wide range of medical problems.
Discovery of stem cells lead to a whole new branch of medicine known as Regenerative medicine.
Embryonic Stem Cells (ESCs)
– Derived from the blastocyst of a 5 day-old embryo
– Are pluripotent, i.e., they can differentiate into almost any cell type in the body (primary-like cells)
– Can renew themselves indefinitely
Adult Stem Cells (e.g. MSCs, NSCs, ADSCs)
– Isolated from adult tissues, organs or blood, cord blood, etc.
– Are multipotent – i.e., can give rise to a number of related cell types
– Can renew themselves a number of times but not indefinitely
Induced Pluripotent Stem Cells (iPS Cells)
Somatic cells can be reprogrammed to form pluripotent stem cells called induced pluripotential stem cells (iPS cell).
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
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The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
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Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
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2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
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Instructions for Submissions thorugh G- Classroom.pptx
Stem cells kl
1. STEM CELLS
By C. Kohn
Agricultural Sciences, Waterford WI
Produced in collaboration with faculty and staff from the Stem Cell and
Regenerative Medicine Center of the University of Wisconsin - Madison, the
Wisconsin Institute for Discovery, and TED LLC
2. CURRENT LIMITATIONS OF MEDICINE
• Modern medicine has many limitations.
• First, much of medicine is non-individualized.
• Few medical treatments are specific to an individual’s genetics or history.
• Second, damage to the body from injuries or illness can be permanent and untreatable.
• For example, some of the damage from a heart attack or stroke is usually permanent, and the patient
does not usually obtain a 100% recovery.
• In many serious injuries or illnesses, a complete recovery may not be possible.
• Finally, the need for tissue or organ transplant is far
greater than the supply.
• The number of people in need of an organ transplant far
exceeds the number of organs available.
• Even when a matching donor is found, a transplant may be
rejected by the patient’s body.
3. STEM CELLS MEDICINE
• Scientists believe that stem cells could help change how patients are
treated by modern medicine.
• Stem cells have the potential to create more individualized treatments
that use the body’s own abilities to repair itself in order to create new
tissue and maybe even new organs.
• Additionally, stem cells may help scientists better understand why some
problems occur, increasing the likelihood of finding effective treatments.
• Stem cells are undifferentiated cells that become the kinds of cells
that make up your body and replace old cells when they wear out
and die.
• An undifferentiated cell is a cell that doesn’t have a job…yet.
• To differentiate means to acquire a specific job and characteristics.
• For example, muscle cells have proteins that allow them to contract; nerve
cells can send electrical signals; bone cells are capable of providing a rigid
structure to support your body’s weight.
Source: weirdscience.ca
4. TYPES OF STEM CELLS
• There are two main kinds of stem cells:
• 1) Tissue-specific Stem Cells
• Also known as “somatic stem cells” or “adult stem cells”
• These are stem cells found in all people and are used to
replace cells in many kinds of tissue as they wear out and
die.
• 2) Pluripotent Stem Cells
• These include embryonic stem cells and induced
pluripotent stem cells.
• These cells can become any kind of tissue in the body. Image Source: Jeff Miller, www.news.wisc.edu
5. TISSUE-SPECIFIC STEM CELLS
• Many (but not all) tissues have somatic stem cells that continually replace old
cells as they wear out and die.
• For example, the base of your intestines have stem cells to replace the cells that are
worn off by digestion and the passing of food.
• These cells are completely replaced every 4 days!
• Similar cells are found in your bone marrow,
underneath your skin, and in many other kinds
of tissues.
• To date, tissue-specific stem cells have been derived
from brain, bone marrow, blood, blood vessels,
skeletal muscle, skin, teeth, heart, gut, liver, ovarian
epithelium, and testis.
Image Source: www.medscape.com
6. EXAMPLES OF TISSUE-SPECIFIC STEM CELLS
• The following are examples of some kinds of tissue-specific stem
cells:
• Hematopoietic stem cells found in bone marrow are the source of all
kinds of blood cells, including red blood cells and white blood cells.
• Mesenchymal stem cells are a source of bone cells, cartilage, fat cells, and
tendons.
• Neural stem cells are the source of all neurons as well as two kinds of
cells that support nerves in the brain and spinal cord.
• Epidermal stem cells are found beneath the skin and at the base of hair
follicles; these stem cells form the protective outer layer of your skin as
well as hair follicles.
7. TISSUE-SPECIFIC STEM CELLS
• Tissue-specific stem cells are multipotent.
• Multipotent cell: a cell that can give rise to multiple different types of cells
typically found in a specific tissue.
• For example, the stem cells beneath your skin can only become the various
types of cells that form skin under normal circumstances.
• There are already treatments in existence that
use tissue-specific stem cells.
• While tissue-specific stem cells can only
differentiate into a limited number of kinds of
cells, it is feasible to treat or even cure some
kinds of human diseases or disorders using these
stem cells.
Image Source: www.clinicares.com
8. STEM CELL TREATMENTS OF LEUKEMIA
• Doctors already use tissue-specific stem cells to treat leukemia, a form of cancer that
affects the cells in your bone marrow that produce blood cells.
• After chemotherapy, a leukemia patient can get a stem cell transplant, replacing the old bad
stem cells with healthy new ones.
• The transplanted stem cells will perform the same job
as the old stem cells – they will produce the blood cells
needed by your body.
• Scientists believe that some treatments that could
be developed from tissue-specific stem cells include
the regeneration of damaged or lost bone tissue,
treatment of autoimmune diseases, development
of insulin-producing cells to treat diabetes,
neurodegenerative diseases like Parkinson’s Disease,
and the repair of some damaged heart tissue after a
heart attack.
9. PLURIPOTENT STEM CELLS
• A pluripotent stem cell is a stem cell that can become any kind of cell
in the body.
• While a multipotent stem cell is generally limited to form the different cell
types present in the tissue from which it was obtained, a pluripotent stem cell
has the capacity to become any one of the 220 human cell types.
• Pluripotent stem cells can also divide indefinitely – unlike tissue-specific stem
cells, they will divide forever without losing their developmental potential.
• There are two kinds of pluripotent stem cells:
• 1) Embryonic stem cells, which are developed from fertilized eggs that are
leftover from fertility clinics and donated with the patient’s consent.
• 2) Induced pluripotent stem cells, which are adult cells that have been changed
by scientists to have the same properties as embryonic stem cells.
10. EMBRYONIC STEM CELLS
• Embryonic stem cells are grown in labs from leftover embryos
knowingly donated by patients at fertility clinics.
• Embryonic stem cells are derived from the Inner Cell Mass of a 5-7 day old
fertilized embryo (also called a blastocyst).
• These embryos were fertilized in lab dishes at in vitro
fertilization (IVF) clinics.
• IVF patients will usually have multiple eggs fertilized
in case they are not successful on the first try.
• As a result, IVF clinics usually have leftover eggs that patients
can choose to donate for research.
• Any unused, unneeded embryos are usually discarded.
Image Source: www.intechopen.com
11. • This is a colony of
embryonic stem cells
under the
microscope.
• ES cells look as if they
have two large nuclei,
because they are
constantly dividing.
This slide courtesy of James Thomson, Director,
Regenerative Biology - Morgridge Institute for
Research, University of Wisconsin - Madison
12. GERM LAYERS
• All tissue in the body comes from the inner cell mass of a 5-7 day old
blastocyst. The inner cell mass develops into three germ layers, the
endoderm, the mesoderm and the ectoderm.
• The endoderm forms soft tissues
like the pancreas and liver.
• The mesoderm becomes muscle
(including the heart), blood, and bone.
• The ectoderm forms the skin and nerve
cells.
• To be a pluripotent stem cell, a stem
cell must be able to become all three
of these germ layers.
This image courtesy of Jordana Lenon, B.S., B.A.
University of Wisconsin-Madison Outreach Specialist
13. INDUCED PLURIPOTENT STEM CELLS
• Induced pluripotent stem cells begin as just normal, mature cells.
• These cells might come from skin, the liver, fat, or other sources.
• Scientists change these cells in order to make
them pluripotent and behave like an
embryonic stem cell.
• Scientists turn off some genes and turn on other
genes of these mature cells so that they have the
same set of genes turned on as in embryonic stem
cells.
• The cell then behaves as if it were an embryonic
stem cell, allowing scientists to create a pluripotent
stem cell without destroying a lab-fertilized embryo.
• IPSC’s also can be patient-specific. If a patient has a disease,
scientists could recreate their actual cells to see how their
body would specifically respond to new treatments before
administering new therapies.
Image Source: wa3230.mj13.serverdomain.org
14. ADVANTAGES OF PLURIPOTENT STEM CELLS
• Both kinds of pluripotent stem cells (embryonic and induced pluripotent) have potential
advantages over tissue-specific stem cells. These include:
• They can become any of the 220 kinds of tissue in the human body.
• They can divide in culture for long periods of time without losing their functionality.
• They can be used for research on normal and abnormal development such as birth defects.
• However, pluripotent stem cells have
some disadvantages as well.
• Embryonic stem cells are controversial
because they require the destruction of an
egg fertilized in a laboratory dish.
• Induced pluripotent stem cells are difficult
to create and are new to science.
• It is very challenging to create mature,
differentiated cells from pluripotent stem cells.
Photo courtesy of the University of Wisconsin Stem Cell and Regenerative Medicine Center Facebook page
15. Tissue-Specific Stem Cell Embryonic Stem Cell Induced Pluripotent Stem
Cell
Also known as… Adult Stem Cell
Somatic Stem Cell
ESC IPSC
Source Found throughout the body
in some kinds of tissue.
The inner cell mass of a 5-7
day old embryo fertilized in a
laboratory dish.
Comes from normal mature
bodily cells that have been
reprogrammed genetically to
resemble an embryonic stem
cell.
Multipotent or Pluripotent? Multipotent Pluripotent Pluripotent
Benefits Can differentiate into
relevant cell types for a given
tissue.
Widely available; found in all
people.
Can become any cell type
present in the body.
Can divide forever.
Will not lose their function
over time.
Useful for studying
development.
Can become any tissue.
Can divide forever.
Will not lose their function
over time.
Less controversial than ECS’s.
Can re-create diseased tissue
for treatment-specific
testing.
Drawbacks Limited capacity to become
kinds of tissue.
Difficult to keep alive in a
laboratory for long periods.
Less available; requires the
destruction of a lab-fertilized
egg.
Most difficult of the three
kinds to obtain and create.
Much research is still needed
to develop treatments.
16. CURRENT AREAS OF PLURIPOTENT STEM CELL RESEARCH
• Understanding Reproduction and Development
• By studying embryonic and induced pluripotent stem cells, scientists can better understand how early
cells and genes form and how this may affect development.
• This may enable scientists to better understand how birth defects, cancers, and degenerative diseases
occur.
• Regenerative and Transplant Medicine for Treating
or Curing Disease
• Pluripotent stem cells may have the capability to become
new tissues and possibly organs for transplant after an
injury or illness.
• Currently the number of people in need of a transplant is far
greater than the supply of transplant tissue and organs.
• Stem cells may provide more organs and tissue for transplant
as well as provide tissue for transplant that currently is not
available for treatments (such as is the case in paralysis).
Photo courtesy of the University of Wisconsin Stem Cell and Regenerative Medicine Center Facebook page
17. CURRENT AREAS OF PLURIPOTENT STEM CELL RESEARCH
• Drug Discovery
• Scientists need pure cultures of specific kinds of tissue on which to test new drugs.
• This can provide them the opportunity to determine how to make a functional drug,
decide at what level a drug becomes dangerous, and identify any possible side effects
before doing human drug trials.
• Current pluripotent stem cell research is
focusing on cures or treatments for the
following: Parkinson’s, diabetes, heart
disease, spinal cord injuries, muscular
dystrophy, leukemia, lymphoma, arthritis,
autism, Down syndrome, sickle cell
anemia, and more.
Photo courtesy of the University of Wisconsin Stem Cell and Regenerative Medicine Center Facebook page
18. REGULATION OF EMBRYONIC STEM CELL RESEARCH
• Researchers who work with stem cells must follow strict guidelines. These include:
• Guidelines created by the U.S. National Academies of Science and the International Society for
Stem Cell Research cover the ethical creation of embryonic stem cell lines.
• These guidelines address proper research practices involving these lines and are updated to address
any new ethical issues that might arise.
• Special oversight committees exist at research institutions and must review and approve all
embryonic stem cell research.
• If federal funds are used to conduct embryonic stem cell research,
these stem cell lines must be approved by the federal government
and must follow guidelines created by the National Institutes of Health.
19. ACKNOWLEDGEMENTS
• Thank you to the following contributors and reviewers who assisted in the development of these
materials:
• James Thomson, Director, Regenerative Biology - Morgridge Institute for Research, University of Wisconsin -
Madison
• William Murphy, Co-director of the UW Stem Cell & Regenerative Medicine Center and Associate Professor,
Biomedical Engineering, University of Wisconsin - Madison
• Timothy Kamp - Co-director of the UW Stem Cell & Regenerative
Medicine Center and Professor of Medicine, University of
Wisconsin - Madison.
• Jordana Lenon - University Relations Specialist, UW Stem Cell &
Regenerative Medicine Center
• Sue Gilbert - UW Stem Cell & Regenerative Medicine Center
• The staff of TED, LLC
• All image sources are located below each picture.
• Any non-cited images are Microsoft stock images.