Scientists have discovered an amazingly simple way that cells stabilize their machinery for forcing apart chromosomes. Their findings are reported Nov. 25 in Nature.
When a cell gets ready to split into new cells, this stable set-up permits …
Tag Archives | number of chromosomes
Finger-trap tension stabilizes cells’ chromosome-separating machinery
Pitt team finds protein that sets the stage for exchanges of DNA code in eggs and sperm
PITTSBURGH, Oct. 13 — A team led by a scientist at the University of Pittsburgh School of Medicine has discovered a regulatory protein that influences where genetic material gets swapped between maternal and paternal chromosomes during the process…
Why the biological clock? Penn study says aging reduces centromere cohesion, disrupts reproduction
PHILADELPHIA — – University of Pennsylvania biologists studying human reproduction have identified what is likely the major contributing factor to the maternal age-associated increase in aneuploidy, the term for an abnormal number of chromoso…
Component in plastic bottles found to cause abnormal pregnancies in mice
Researchers have found disturbing new evidence suggesting that environmental exposure to a ubiquitous substance may cause chromosomally abnormal pregnancies. They have learned that low levels of a compound used in the manufacture of common plastic food and beverage containers and baby bottles interfere with cell division in the eggs of female mice. The disruption of cell division can result in an abnormal number of chromosomes in the eggs, a condition known as aneuploidy, which is the leading cause of mental retardation and birth defects in humans. Down syndrome is an example of a disorder caused by the addition of an extra chromosome.
Abnormal Number of Chromosomes is One Step in Cancer Development
Researchers have produced the first laboratory evidence to show that a cell’s possession of an abnormal numbers of chromosomes contributes to the development of cancers. Their report on the role of this chromosomal instability, known as aneuploidy, appears in today’s online edition of the Feb. 3 Journal of Cell Biology. Because 85 percent of human cancer cells possess an abnormal number of chromosomes, researchers have long been curious about the role of aneuploidy in the multistep cancer process.