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Adult hearts lack stem cells: Study

IANS  |  London 

Heart that might repair the heart muscle after a do not exist in adults, say researchers after two decades of study.

The study offered scientific evidence to a decision made in October by the US health authorities to pause a clinical trial using to treat over concerns over the lack of "scientific foundations" of trial, reported.

Researchers from the in the Netherlands, the and the London, generated a cell-by-cell map of all dividing cardiac cells before and after a using advanced

They recorded many types of cells divide upon damage in the mouse heart, but that none of these are capable of generating new heart muscle.

During a or myocardial infarction, the blood supply to part of the heart muscle is cut off, and those muscles might die.

Researchers and clinicians have previously searched for two decades for cardiac that are able to replace lost tissue by cell division.

A clinical trial started in 2015 to test a type of in the heart called c-kit cells, but it was called a halt in October 29 after retracted 31 papers upon which the trial was based.

Many of the "false leads" of past studies called those cells cardiac stem cells which turned out to produce blood vessels or immune cells, but never heart muscle, according to the new study published in

In other words, heart muscle that is lost due to a heart attack cannot be replaced.

The researchers also found that connective tissue cells known as fibroblasts, intermingled with heart muscle cells, would respond vigorously to a by undergoing multiple cell divisions.

Those fibroblasts in mice can produce tissue that replaces the lost cardiac muscle, holds together the congested area but contains no muscle to improve the pump function of the heart, according to the study.

However, the tissue formation has its own function. When the formation is blocked, the mice suffer from



(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)

First Published: Wed, December 05 2018. 16:44 IST