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Related Concept Videos

Mesenchymal Stem Cells01:19

Mesenchymal Stem Cells

4.6K
Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...
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Transcriptomic Shifts in Multipotent Mesenchymal Stromal Cells during Microgravity Simulation.

D A Yakubets1, L B Buravkova2

  • 1Institute of Biomedical Problems, Russian Academy of Sciences, 123007, Moscow, Russia. lizard_96@mail.ru.

Doklady. Biochemistry and Biophysics
|January 23, 2025
PubMed
Summary
This summary is machine-generated.

Spaceflight causes bone loss (osteopenia) by reducing the proliferation of mesenchymal stem cells (MSCs). Simulated microgravity significantly downregulated genes crucial for cell division, impacting bone replenishment.

Keywords:
RNA sequencinggene expressionmultipotent mesenchymal stromal cells (MMSCs)proliferationsimulated microgravity

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Area of Science:

  • Space biology
  • Cellular biology
  • Biomedical research

Background:

  • Space flight poses risks to human physiology, notably bone loss (osteopenia).
  • Understanding cellular mechanisms of bone tissue replenishment is crucial for long-duration space missions.
  • Mesenchymal stem cells (MSCs) play a key role in bone regeneration.

Purpose of the Study:

  • To investigate the impact of simulated microgravity on the transcriptome profile of human bone marrow mesenchymal stem cells (hBM-MSCs).
  • To identify molecular mechanisms underlying cellular changes in response to space flight conditions.

Main Methods:

  • RNA sequencing was employed to analyze gene expression changes in hBM-MSCs after 5 days of simulated microgravity.
  • Fluorescence microscopy was used to validate transcriptional findings at the cellular level.

Main Results:

  • Simulated microgravity led to a significant downregulation of genes involved in cell proliferation and the mitotic phase of the cell cycle.
  • Transcriptional changes indicated a decrease in the proliferative activity of hBM-MSCs.

Conclusions:

  • Simulated microgravity reduces the proliferative capacity of hBM-MSCs.
  • These findings highlight potential cellular mechanisms contributing to osteopenia observed in astronauts.
  • Further research is needed to develop countermeasures for spaceflight-induced bone loss.