What is stem cell therapy and how is it used in regenerative medicine?
Master all 18 flashcards
Mastering this deck will enhance your understanding of cutting-edge developments in cell biology, equipping you with knowledge about innovative therapies, gene editing techniques, and mechanisms of aging. This foundation supports advanced research, clinical applications, and informed scientific discussions.
Showing 18 of 18 cards
| # | Front | Back | Hint |
|---|---|---|---|
| 1 | What is stem cell therapy and how is it used in regenerative medicine? |
Master all 18 flashcards
Explore other decks you might find helpful
Latest research areas such as stem cell therapy, cellular aging, and CRISPR gene editing.
Stem cell therapy involves using stem cells to repair or replace damaged tissues or organs. It is used in regenerative medicine to treat conditions like Parkinsonโs disease, spinal cord injuries, and heart disease by promoting tissue regeneration and restoring function. |
| Think of stem cells as the body's raw materials for repair. |
| 2 | How does cellular aging affect organ function and what are some molecular markers of aging cells? | Cellular aging leads to decreased regenerative capacity, accumulation of damage, and altered function, contributing to organ decline. Molecular markers include shortened telomeres, increased senescence-associated ฮฒ-galactosidase activity, and accumulation of DNA damage. | Remember 'telomeres' as the 'clock' ticking in aging cells. |
| 3 | What is CRISPR-Cas9 and how does it enable gene editing? | CRISPR-Cas9 is a revolutionary gene editing tool that allows precise modification of DNA by using a guide RNA to target specific sequences and the Cas9 nuclease to introduce cuts, enabling gene disruption, correction, or insertion. | Think of CRISPR as molecular scissors guided by a GPS. |
| 4 | What are the potential therapeutic applications of CRISPR technology? | CRISPR can be used to treat genetic disorders (e.g., sickle cell anemia), develop cancer therapies, create disease-resistant crops, and potentially eradicate certain infectious agents by editing genomes. | CRISPR's versatility makes it a powerful tool across medicine and agriculture. |
| 5 | Explain the concept of cellular senescence and its role in aging. | Cellular senescence is a state where cells permanently stop dividing but remain metabolically active. Senescent cells contribute to aging by secreting pro-inflammatory factors (senescence-associated secretory phenotype, SASP), which impair tissue function. | Senescent cells are like 'retired' cells that can cause trouble. |
| 6 | What is the significance of telomeres in cellular aging? | Telomeres are repetitive DNA sequences at chromosome ends that shorten with each cell division. Critically short telomeres trigger senescence or apoptosis, linking telomere length to cellular aging and lifespan. | Think of telomeres as the plastic tips of shoelaces preventing frayingโshortening over time. |
| 7 | How does CRISPR differ from earlier gene-editing technologies like TALENs and ZFNs? | CRISPR is simpler, more efficient, and cost-effective because it uses RNA guides for targeting, whereas TALENs and ZFNs rely on protein-based DNA recognition, which are more complex to design and implement. | CRISPR is the 'easy-to-program' molecular scissors. |
| 8 | What are off-target effects in CRISPR gene editing, and why are they a concern? | Off-target effects occur when CRISPR unintentionally edits DNA sequences similar to the target site, potentially causing unintended mutations. They pose safety concerns, especially for clinical applications. | Think of off-target effects as 'misdirected edits.' |
| 9 | Describe how induced pluripotent stem cells (iPSCs) are generated and their significance. | iPSCs are created by reprogramming adult somatic cells to a pluripotent state using factors like Oct4, Sox2, Klf4, and c-Myc. They are significant because they provide patient-specific cells for therapy, disease modeling, and drug testing. | Reprogramming adult cells to an embryonic-like state is like turning back the biological clock. |
| 10 | What are senolytic drugs and how might they influence aging? | Senolytic drugs selectively eliminate senescent cells, reducing inflammation and tissue dysfunction associated with aging, thereby potentially extending healthspan and delaying age-related diseases. | Think of senolytics as 'senescent cell cleaners.' |
| 11 | How does cellular senescence contribute to cancer prevention and aging? | Senescence prevents damaged cells from proliferating, acting as a tumor suppressor. However, accumulation of senescent cells over time promotes aging and chronic inflammation, contributing to age-related decline. | A double-edged sword: protective yet detrimental in the long run. |
| 12 | What ethical considerations are associated with gene editing in human embryos? | Ethical concerns include potential unintended consequences, germline modifications passed to future generations, consent issues, and the risk of 'designer babies.' These raise questions about safety, morality, and societal impact. | Think of ethics as the moral compass guiding powerful technologies. |
| 13 | What is the role of mitochondria in aging and cellular health? | Mitochondria generate cellular energy but also produce reactive oxygen species (ROS), which can cause damage over time. Mitochondrial dysfunction is linked to aging, neurodegeneration, and metabolic diseases. | Mitochondria are the cellโs power plantsโwhen they fail, cell health declines. |
| 14 | How can stem cell therapy be used to treat neurodegenerative diseases? | Stem cell therapy aims to replace lost or damaged neurons, promote regeneration, and modulate inflammation in diseases like Parkinsonโs and Alzheimerโs, potentially restoring neural function. | Think of stem cells as repair workers for the nervous system. |
| 15 | What are the challenges of translating CRISPR technology from research to clinical therapy? | Challenges include ensuring precise targeting, avoiding off-target effects, efficient delivery into human cells, immune responses, and ethical concerns about germline editing. | Moving from lab to clinic requires overcoming safety and ethical hurdles. |
| 16 | Explain the concept of epigenetic changes and their relevance to cellular aging. | Epigenetic changes involve modifications like DNA methylation and histone acetylation that alter gene expression without changing DNA sequence. These changes accumulate with age and influence aging and disease susceptibility. | Epigenetics acts like a 'dimmer switch' on gene activity. |
| 17 | What is the potential of personalized medicine using gene editing techniques? | Personalized medicine tailors treatments based on an individual's genetic profile, using gene editing tools like CRISPR to correct mutations, improve drug efficacy, and reduce adverse effects. | Think of it as 'customized therapy' based on your genetic blueprint. |
| 18 | Describe how aging-related cellular pathways like mTOR influence longevity. | The mTOR pathway regulates cell growth and metabolism. Inhibition of mTOR (e.g., by rapamycin) has been shown to extend lifespan in various organisms by reducing cellular stress and enhancing autophagy. | mTOR acts as the 'growth switch'โless activity can promote longevity. |