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Home NEWS Science News Biology

Fat cell hormone boosts potential of stem cell therapy

Bioengineer by Bioengineer
July 10, 2020
in Biology
Reading Time: 3 mins read
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A team of researchers led by Osaka University find that adiponectin, a hormone derived from fat cells, improves the efficacy of mesenchymal stem cell-based treatment of heart failure

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Credit: Copyright© 2020 Molecular Therapy. All right reserved.

Osaka, Japan – Mesenchymal stem cells (MSCs) have the potential to differentiate into a range of different cell types, including bone, fat, and muscle cells. But it’s their ability to stimulate the repair of damaged tissue that has captured the interest of researchers worldwide, with MSCs demonstrating therapeutic effects in the treatment of conditions such as heart disease, liver cirrhosis, and diabetes.

However, despite the success of several clinical trials, researchers have struggled to explain the sometimes variable results of MSC therapy.

In a recent study published in Molecular Therapy, a research team led by Osaka University investigated possible reasons for the inconsistent outcomes of MSC therapy, showing that host factors and not just the MSCs themselves may be to blame.

“We recently reported that adiponectin, a beneficial hormone secreted by fat cells that plays a role in muscle regeneration, binds to receptor protein T-cadherin on cell surfaces,” explains lead author Yuto Nakamura. “Given that T-cadherin is abundant on the surfaces of MSCs, we investigated whether adiponectin is involved in the regenerative activity of MSCs in a model of heart failure.”

Adiponectin is found in high concentrations in blood and has been shown to stimulate the production of exosomes, small membrane-bound vesicles that carry proteins, lipids, and DNA between cells. Interestingly, exosomes secreted by stem cells carry signals that stimulate the repair of recipient cells.

By first measuring exosome production in a cell culture-based system, the researchers confirmed that increasing amounts of adiponectin led to a corresponding increase in the abundance of MSC-derived exosomes, which was reliant on the expression of T-cadherin.

Injection of the MSCs into mice suffering from heart failure resulted in a significant improvement in left ventricular cardiac function, which was associated with the increased number of exosomes in circulation. Most importantly though, cardiac function following MSC therapy could be further strengthened by the increases of adiponectin level in blood.

“Together, our assays showed that MSCs exert their therapeutic effects on cardiac function through the production of exosomes, which is influenced by host plasma adiponectin levels and is reliant on MSC T-cadherin expression,” says study corresponding author Shunbun Kita.

“Given these results, drugs such as a PPARγ agonists, which increase adiponectin production, could be administered in combination with MSC therapy to significantly enhance the therapeutic potential–not only for severe heart failure, but also for a variety of diseases involving tissue damage, including COVID-19-associated acute respiratory distress syndrome.”

And in case you were wondering, it turns out that too much fat is actually detrimental to adiponectin production, so doctors won’t be prescribing a high fat diet any time soon!

###

The article, “Adiponectin stimulates exosome release to enhance mesenchymal stem cell-driven therapy of heart failure in mice,” was published in Molecular Therapy at DOI: https://doi.org/10.1016/j.ymthe.2020.06.026.

About Osaka University

Osaka University was founded in 1931 as one of the seven imperial universities of Japan and is now one of Japan’s leading comprehensive universities with a broad disciplinary spectrum. This strength is coupled with a singular drive for innovation that extends throughout the scientific process, from fundamental research to the creation of applied technology with positive economic impacts. Its commitment to innovation has been recognized in Japan and around the world, being named Japan’s most innovative university in 2015 (Reuters 2015 Top 100) and one of the most innovative institutions in the world in 2017 (Innovative Universities and the Nature Index Innovation 2017). Now, Osaka University is leveraging its role as a Designated National University Corporation selected by the Ministry of Education, Culture, Sports, Science and Technology to contribute to innovation for human welfare, sustainable development of society, and social transformation.

Website: https://resou.osaka-u.ac.jp/en/top

Media Contact
Saori Obayashi
[email protected]

Related Journal Article

http://dx.doi.org/10.1016/j.ymthe.2020.06.026

Tags: CardiologyCell BiologyInternal MedicineMedicine/HealthMolecular BiologyPhysiology
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