Showing posts with label stem cells. Show all posts
Showing posts with label stem cells. Show all posts

Monday, March 19, 2018

Stem cell therapy may help reverse effects of premature menopause, restore fertility

stem cell threapy and fertility,stem cell therapy and premature menopause
image credit: mitochondrialdiseasenews.com
Young women with premature ovarian insufficiency (POI) may be able to use their own bone marrow stem cells to rejuvenate their ovaries and avoid the effects of premature menopause, new research suggests. The preliminary results from the ongoing ROSE clinical trial will be presented Tuesday at ENDO 2018, the 100th annual meeting of the Endocrine Society, in Chicago, Ill.

"In the two participants who have completed the treatment to date, serum estrogen levels have increased as soon as 3 months after the injection of stem cells, and the effect has lasted for at least one year. Their menopausal symptoms have been alleviated, and six months after the injection of the stem cells into the ovaries, they have resumed menses," said senior author Ayman Al-Hendy, M.D., Ph.D., Professor of Gynecology and Director of Translational Research at the University of Illinois at Chicago.

The researchers plan to enroll 33 participants in their clinical trial. For the two patients who have undergone the procedure so far, they collected each woman's own mesenchymal stem cells from her posterior iliac crest bone marrow and used minimally invasive laparoscopy to inject the cells into one ovary, keeping the second, untreated, ovary as a control. The authors followed the patients closely with frequent blood work, imaging of the ovaries, menopausal symptom questionnaires, and safety studies.

Now that both women's estrogen levels have increased significantly and they have begun to menstruate, the research team looks forward to the possibility that they may again become fertile.

"Ultrasound imaging of treated ovaries shows significant size increase in the treated ovaries compared to the contralateral untreated ovaries. In the cases completed so far, the patients have tolerated the treatment very well with no complications or side effects," Al-Hendy said.

The ovaries produce hormones and eggs typically until menopause in the early fifties, when they stop working. About 1 percent of women have POI, and some are as young as in their teens, the authors wrote in their abstract.

With POI, the ovaries stop working and the women enter early menopause. They lose the ability to menstruate, ovulate and have children using their own eggs, and they may be at increased risk for menopausal symptoms including hot flushes, night sweets, mood swings and vaginal dryness, and for cardiovascular disease, osteoporosis-related fracture and earlier cognitive function decline, Al-Hendy said.

The authors are currently enrolling new participants with the goal of following more patients for a longer period.

Source: https://www.sciencedaily.com/releases/2018/03/180318144839.htm


Tuesday, October 24, 2017

New research on sperm stem cells has implications for male infertility and cancer

sperm stem cells and male infertility,cancer and sperm stem cells
via lifenews.com
"New research from scientists at Huntsman Cancer Institute (HCI) at the University of Utah and collaborators at University of Utah Health (U of U Health) sheds light on the complex process that occurs in the development of human sperm stem cells. This is the first study to characterize the changes human sperm stem cells undergo as they mature. The results have implications for understanding male infertility as well as cancer development and were published in the journal Cell Stem Cell.

Previous studies of sperm stem cells have been limited to model systems, including mice. But this first study of developing human sperm stem cells revealed this process was much more complex in humans than had been previously understood. Using genome analysis tools, scientists outlined the multistage process that sperm stem cells undergo during their normal development.

"This information yields new insights into how sperm stem cells function and develop under normal circumstances," says the study's lead author Bradley Cairns, PhD, senior director of basic science at HCI and professor and chair of oncological sciences at the U of U. "We have built a very important framework we can now use to help us understand what happens when things go wrong, resulting in issues like infertility and cancer in men..."

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Monday, February 20, 2017

Infertility in cancer patients: drug to prevent infections may also help regenerate sperm from stem cells

male infertility,cancer,sperm,stem cells
via human-fertility.com
"A new study led by Brian Hermann, assistant professor of biology at The University of Texas at San Antonio (UTSA), shows promising evidence that a medication previously used to prevent infections in cancer patients can also keep them from becoming infertile. Losing fertility is a frequent problem among cancer patients, as treatments for the disease often halt sperm production.

Hermann and his research team have been pursuing a number of cutting-edge research initiatives to restore fertility in men who have lost their ability to have children as a result of cancer treatments they received as children. While working on methods to restart sperm production, the researchers discovered a link between a drug for recovering cancer patients and the absence of normal damage to reproductive ability.

The drug is called G-CSF or granulocyte colony-stimulating factor. It stimulates the bone marrow to produce neutrophils, which are white blood cells that are needed to fight infections. They're commonly lost after chemotherapy and radiation treatments.

"We were using G-CSF to prevent infections in our research experiments," Hermann said. "It turned out that the drug also had the unexpected impact of guarding against male infertility..."

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Tuesday, October 4, 2016

Fertility genes required for sperm stem cells

fertility genes and sperm stem cells
credit: © ezume images/fotolia
"The underlying cause of male infertility is unknown for 30 percent of cases. In a pair of new studies, researchers at University of California San Diego School of Medicine determined that the reproductive homeobox (RHOX) family of transcription factors -- regulatory proteins that activate some genes and inactivate others -- drive the development of stem cells in the testes in mice. 

The investigators also linked RHOX gene mutations to male infertility in humans. The mouse study is published September 27 by Cell Reports and the human study was published September 15 by Human Molecular Genetics.

"Infertility in general, and especially male fertility, gets little attention considering how common of a problem it is -- about 15 percent of couples are affected, and nearly half of these cases are due to male infertility," said Miles Wilkinson, PhD, professor of reproductive medicine at UC San Diego School of Medicine and senior author of the Cell Reports study. "That means around 7 percent of all males of reproductive age -- nearly 4 million men in the U.S. -- have fertility problems." Wilkinson is also a co-author of the Human Molecular Genetics study, which was led by Jörg Gromoll, PhD, at the University of Münster in Germany..."