Neurogenesis in Adult Brain

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Questions and Answers

What is one way to approach disease aetiology using iPS cells?

  • Comparing the growth of iPS cells with embryonic stem cells
  • Studying environmental risk factors in iPS cells
  • Comparing the growth of patient-derived neurons with control-derived neurons (correct)
  • Inducing mutations in iPS cells with CRISPR-cas9

Where in the adult brain have two neurogenic niches been consistently found in rodents?

  • Subventricular zones of the lateral ventricle and subgranular zone of the dentate gyrus (correct)
  • Cerebellum and brainstem
  • Frontal lobe and occipital lobe
  • Olfactory bulb and hippocampus

What technology development in the early '90s was crucial for proving neurogenesis in the adult brain?

  • Use of genetic engineering
  • Invention of advanced microscopes (correct)
  • Development of new imaging techniques
  • Introduction of neuroimaging software

Which genome editing system is mentioned as one of the ways to induce genetic variation into cells?

<p>CRISPR-cas9 (A)</p> Signup and view all the answers

Where do newborn neurons migrate to in the adult brain after being generated in the subventricular zones?

<p>Olfactory bulb (C)</p> Signup and view all the answers

What is the purpose of inducing genetic variants into iPS cells?

<p>To observe differences in neuron development (D)</p> Signup and view all the answers

Who conducted elegant work assessing neurogenesis in postmortem human brains using C14 concentration measurement?

<p>Jonas Frisen (A)</p> Signup and view all the answers

What are some examples of genetic variation induction methods mentioned in the text?

<p>CRISPR-cas9 and TALENs (B)</p> Signup and view all the answers

What kind of variants can be induced into iPS cells according to the text?

<p>Genetic variants associated with disorders (D)</p> Signup and view all the answers

What does the concentration of nuclear-bomb-test-derived C14 in genomic DNA correlate with in postmortem human brains?

<p>Time after the date of birth of the individual (C)</p> Signup and view all the answers

Which region besides the hippocampus has demonstrated the generation of new neurons throughout adulthood?

<p>Subventricular zones (A)</p> Signup and view all the answers

What is the focus of studying environmental risk factors in relation to disease aetiology?

<p>Understanding external contributors to diseases (B)</p> Signup and view all the answers

What was the purpose of the initial experiment where all 24 factors were transfected into fibroblasts?

<p>To determine which factor induces pluripotency in fibroblasts (A)</p> Signup and view all the answers

What is the significance of repeating the experiment with only 23 factors by leaving one out each time?

<p>To identify the most significant factors for pluripotency induction (A)</p> Signup and view all the answers

What is the main idea behind repeating the infection with 23 factors multiple times?

<p>To confirm the importance of each individual factor (D)</p> Signup and view all the answers

Why did the researcher choose to infect fibroblasts with 23 factors instead of all 24 in the subsequent experiments?

<p>To investigate the effect of reducing the number of factors on pluripotency (C)</p> Signup and view all the answers

What is the main goal of generating blue colonies in the subsequent experiments as mentioned in the text?

<p>To indicate that a specific factor is unnecessary for pluripotency induction (C)</p> Signup and view all the answers

What conclusion can be drawn if blue colonies are still observed when one factor is omitted in the experiments?

<p>The omitted factor is not essential for inducing pluripotency (D)</p> Signup and view all the answers

What gene is being referred to as CACNA1C in the text?

<p>CACNA1C (B)</p> Signup and view all the answers

What is the main focus of the study mentioned in the text?

<p>Investigating the effects of a calcium channel mutation in neurons (C)</p> Signup and view all the answers

Which type of cells were generated from patients with Timothy syndrome and control individuals?

<p>iPS cells (B)</p> Signup and view all the answers

What was the major finding regarding the behavior of the calcium channel in neurons derived from Timothy syndrome patients?

<p>Reduced calcium channel activity (B)</p> Signup and view all the answers

What did the researchers observe when treating cells with an inhibitor of calcium flux?

<p>Complete elimination of calcium channel activity (C)</p> Signup and view all the answers

Besides neurons, where else are calcium channels highlighted for their importance?

<p>Muscle cells (D)</p> Signup and view all the answers

What is a challenge associated with the variability of cells taken from control individuals?

<p>Higher variability compared to mice cells (D)</p> Signup and view all the answers

Why does the text mention that every mouse in a colony is genetically identical?

<p>To show a contrast with the genetic variability in individual humans (B)</p> Signup and view all the answers

What is a key characteristic of the disorders being studied according to the text?

<p>Affect the system properties of the brain as a whole (D)</p> Signup and view all the answers

What does the text suggest as a challenge with the iPS system in relation to brain disorders?

<p>Struggle to build models with inherent system properties (C)</p> Signup and view all the answers

What kind of properties are considered inaccessible when studying disorders like schizophrenia or autism?

<p>System properties that emerge from the brain working as a whole (B)</p> Signup and view all the answers

Why did the text mention Madeline Lancaster's work with growing cerebral organoids?

<p>To showcase the success in modeling system properties (C)</p> Signup and view all the answers

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