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Home NEWS Science News Biology

Researchers show how stem cell depletion leads to recurring pregnancy loss

Bioengineer by Bioengineer
March 25, 2021
in Biology
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Credit: AlphaMed Press

Durham, NC – Depletion of a certain type of stem cell in the womb lining during pregnancy could be a significant factor behind miscarriage, according to a study released today in STEM CELLS. The study, by researchers at Warwick Medical School, University of Warwick, Coventry, England, reports on how recurrent pregnancy loss is a result of the loss of decidual precursor cells prior to conception.

“This raises the possibility that they can be harnessed to prevent pregnancy disorders,” said corresponding author Jan J. Brosens, M.D., Ph.D., professor of obstetrics and gynecology at Warwick Medical School (WMS).

The womb lining – or endometrium – is a highly regenerative tissue capable of adopting different physiological states during the reproductive years. In the second half of the menstrual cycle when progesterone levels are high, the endometrium starts remodeling intensively, heralding the start of a short window during which an embryo can implant. Pregnancy depends on this transformation, a process called decidua, as it is driven by the differentiation of endometrial stromal cells into specialized decidual cells. These cells impart the plasticity needed for tissue to accommodate an embryo’s rapid growth.

“While the magnitude of tissue remodeling required for pregnancy makes it likely that poised progenitor and highly proliferative decidual precursor cells are critical for the formation of a robust maternal-fetal interface, the underlying mechanisms behind this are unclear,” Dr. Brosens said.

The same team had recently described the presence of a discrete population of highly proliferative mesenchymal cells (hPMC) during the window of implantation. Mesenchymal stem/stromal cells can be isolated from bone marrow, adipose and other tissue sources, and can differentiate into a variety of cell types depending on the conditions of the culture they are grown in. In this latest study, the research team set out to characterize these hPMCs.

“Our findings indicate that hPMC are derived from circulating bone marrow-derived stem cells and recruited into the lining of the womb at the time of embryo implantation. These cells appear critical in pregnancy to accommodate the rapidly growing placenta.” Dr. Brosens said. “We also found that these rare but highly specialist cells are depleted in the womb lining of women with recurrent pregnancy.”

Siobhan Quenby, M.D., FRCOG, professor of obstetrics and Honorary Consultant at University Hospitals Coventry and Warwickshire and the University of Warwick, was part of the research team. “These are very exciting findings,” she said. “We have already demonstrated that we can increase these highly proliferative cells in the lining of womb before pregnancy. These new findings explain why these highly proliferative cells are so important for the prevention of miscarriage and possibly spontaneous preterm labor, two devasting pregnancy disorders that affect many women and couples all over the world.”

Dr. Jan Nolta, Editor-in-Chief of STEM CELLS, said, “this key study begins to find answers to a very concerning problem in pregnancy disorders and gives insight into understanding factors that could contribute to pregnancy loss. We are very excited to be able to publish these important results.”

The study involved recruitment of women attending the Tommy’s National Miscarriage Research Centre at University Hospital Coventry and Warwickshire National Health Service Trust, England, and was supported by the Wellcome Trust.

###

The full article, “Characterization of highly proliferative decidual precursor cells during the window of implantation in human endometrium,” can be accessed at https://stemcellsjournals.onlinelibrary.wiley.com/doi/abs/10.1002/stem.3367.

About the Journal: STEM CELLS, a peer reviewed journal published monthly, provides a forum for prompt publication of original investigative papers and concise reviews. The journal covers all aspects of stem cells: embryonic stem cells/induced pluripotent stem cells; tissue-specific stem cells; cancer stem cells; the stem cell niche; stem cell epigenetics, genomics and proteomics; and translational and clinical research. STEM CELLS is co-published by AlphaMed Press and Wiley.

About AlphaMed Press: Established in 1983, AlphaMed Press with offices in Durham, NC, San Francisco, CA, and Belfast, Northern Ireland, publishes three internationally renowned peer-reviewed journals with globally recognized editorial boards dedicated to advancing knowledge and education in their focused disciplines. STEM CELLS® is the world’s first journal devoted to this fast paced field of research. THE ONCOLOGIST® is devoted to community and hospital-based oncologists and physicians entrusted with cancer patient care. STEM CELLS TRANSLATIONAL MEDICINE® is dedicated to significantly advancing the clinical utilization of stem cell molecular and cellular biology. By bridging stem cell research and clinical trials, SCTM will help move applications of these critical investigations closer to accepted best practices.

About Wiley: Wiley, a global company, helps people and organizations develop the skills and knowledge they need to succeed. Our online scientific, technical, medical and scholarly journals, combined with our digital learning, assessment and certification solutions, help universities, learned societies, businesses, governments and individuals increase the academic and professional impact of their work. For more than 200 years, we have delivered consistent performance to our stakeholders. The company’s website can be accessed at http://www.wiley.com.

Media Contact
Chelsea Kekahuna
[email protected]

Related Journal Article

http://dx.doi.org/10.1002/stem.3367

Tags: BiologyCell Biology
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