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Related Concept Videos

Stem Cell Culture01:17

Stem Cell Culture

Stem cell research aims to find ways to use stem cells to regenerate and repair cellular damage. Over time, most adult cells undergo the wear and tear of aging and lose their ability to divide and repair themselves. Stem cells do not display a particular morphology or function. Adult stem cells, which exist as a small subset of cells in most tissues, keep dividing and can differentiate into a number of specialized cells generally formed by that tissue. These cells enable the body to renew and...
Multipotency of Hematopoietic Stem Cells01:19

Multipotency of Hematopoietic Stem Cells

The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...

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Related Experiment Video

Updated: May 21, 2026

Counting Human Neural Stem Cells
06:37

Counting Human Neural Stem Cells

Published on: August 22, 2007

Counting stem cells: methodological constraints.

Leonid V Bystrykh1, Evgenia Verovskaya, Erik Zwart

  • 1Laboratory of Stem Cell Research, European Research Institute for the Biology of Ageing, University Medical Center Groningen, University of Groningen, The Netherlands. l.bystrykh@med.umcg.nl

Nature Methods
|June 7, 2012
PubMed
Summary
This summary is machine-generated.

Estimating the number of hematopoietic stem cells is complex. Methodological factors in clonal analysis, from enzyme choice to sequencing depth, can significantly skew results, leading to inaccurate stem cell counts.

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Last Updated: May 21, 2026

Counting Human Neural Stem Cells
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Published on: August 22, 2007

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Enumeration of Neural Stem Cells Using Clonal Assays
10:32

Enumeration of Neural Stem Cells Using Clonal Assays

Published on: October 4, 2016

Area of Science:

  • Hematopoiesis research
  • Stem cell biology
  • Genomic analysis

Background:

  • The precise number of stem cells driving hematopoiesis remains debated.
  • Retroviral tagging is a common method for assessing stem cell clonal contribution.
  • Previous clonal analyses may be affected by technical limitations.

Purpose of the Study:

  • To critically evaluate methodological factors influencing clonal analyses in stem cell studies.
  • To highlight potential biases in estimating stem cell counts.
  • To inform future research on hematopoietic stem cell quantification.

Main Methods:

  • Review and critique of retroviral tagging methodologies for stem cell analysis.
  • Discussion of technical variables including restriction enzyme selection and polymerase chain reaction (PCR) bias.
  • Analysis of the impact of high-throughput sequencing depth and tagging strategies.

Main Results:

  • Early low-resolution methods likely underestimated stem cell contribution.
  • Modern high-throughput techniques may lead to an overestimation of stem cell numbers.
  • Specific methodological choices significantly influence the interpretation of clonal data.

Conclusions:

  • Methodological factors are critical determinants of observed stem cell counts in hematopoiesis.
  • Careful consideration of technique is essential to avoid under- or overestimation of stem cell populations.
  • Standardization and critical evaluation of methods are needed for accurate stem cell quantification.