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Latest Germ cell Stories

Stem Cells Of Infertile Men Used To Create Preliminary Sperm Cells
2014-05-02 08:25:30

April Flowers for redOrbit.com - Your Universe Online A new study, from the Stanford University School of Medicine and Montana State University, demonstrates that, when implanted into the reproductive system of a mouse model, stem cells created from adult, infertile men will yield primordial germ cells. Primordial germ cells normally become sperm cells. The findings, published in Cell Reports, help to further our understanding of a genetic cause of male infertility and basic sperm...

2014-04-28 09:40:31

Shawn Ahmed, PhD, shows that tweaking specific cellular mechanisms helps tiny worms overcome infertility through a pathway of cellular interactions that result in long life. The finding gives clues to how the molecular interactions in cells of one organism affect progeny many generations later. The evidence for what causes aging has typically been limited to the study of a single organism’s lifespan; our cells divide many times throughout our lives and eventually cause organs and our...

2014-04-18 15:49:22

Studies carry implications for understanding cancer Johns Hopkins researchers have discovered an unexpected phenomenon in the organs that produce sperm in fruit flies: When a certain kind of stem cell is killed off experimentally, another group of non-stem cells can come out of retirement to replace them. The discovery sheds light on the tiny "environments" that stem cells occupy in animal bodies and may help explain how stem cells in tumors replenish themselves, the researchers report...

2014-04-11 10:18:08

A new generation of high yield plants could be created following a fundamental change in our understanding of how plants develop. The research, led by the University of Warwick and published in the journal Science, provides the first evidence that plants have evolved ways to control embryo growth and development by emitting information from surrounding cells. The international study, headed by Dr Jose Gutierrez-Marcos from Warwick's School of Life Sciences, revealed that female sex...

Two Y Genes Can Replace Entire Y Chromosome For Assisted Reproduction In Mice
2013-11-21 15:33:20

University of Hawaii at Manoa The Y chromosome is a symbol of maleness, present only in males and encoding genes important for male reproduction. But live mouse offspring can be generated with assisted reproduction using germ cells from males with the Y chromosome contribution limited to only two genes: the testis determinant factor Sry and the spermatogonial proliferation factor Eif2s3y. "Does this mean that the Y chromosome (or most of it) is no longer needed? Yes, given our current...

2013-04-30 10:50:15

Mammalian females ovulate periodically over their reproductive lifetimes, placing significant demands on their ovaries for egg production. Whether mammals generate new eggs in adulthood using stem cells has been a source of scientific controversy. If true, these "germ-line stem cells" might allow novel treatments for infertility and other diseases. However, new research from Carnegie's Lei Lei and Allan Spradling demonstrates that adult mice do not use stem cells to produce new eggs. Their...

Study Suggests Stem Cells Strive For Early Maturity
2012-12-28 09:16:04

Connie K. Ho for redOrbit.com — Your Universe Online Scientists from the Stowers Institute for Medical Research recently completed a study that shows the possibility that stem cells work towards maturity at an earlier stage than originally thought. In particular, the researchers believe that embryonic stem cells are different from muscle or nerve cells in their ability to take on any cellular role. With this “pluripotency,” the stem cells are flexible enough to...

2012-10-03 10:22:45

Research may 1 day lead to method for helping infertile, premenopausal women produce enough eggs to become pregnant Regenerative-medicine researchers have moved a promising step closer to helping infertile, premenopausal women produce enough eggs to become pregnant. Today, surgeons at Wake Forest Baptist Medical Center's Institute for Regenerative Medicine in Winston-Salem, NC, reported that they were able to stimulate ovarian cell production using an in vitro rat model, and observed as...

From Embryonic Stem Cells, A Sperm Replacement And Easier Path To Genetic Modification
2012-04-26 10:39:13

Researchers reporting in the April 27 issue of the journal Cell , a Cell Press publication, have devised a new and improved method for producing genetically modified animals for use in scientific research. The method relies on haploid embryonic stem cells (haESCs) instead of sperm to artificially fertilize immature egg cells. Such stem cells are similar to sperm in that they carry only genetic material from a mouse "dad." Not only will the advance make it easier to produce genetically...

2011-10-14 09:05:22

Ordinarily, embryonic stem cells exist only a day or two as they begin the formation of the embryo itself. Then they are gone. In the laboratory dish, however, they act more like perpetual stem cells — renewing themselves and exhibiting the ability to form cells of almost any type, a status called totipotency. Dr. Thomas Zwaka, associate professor in the Stem Cell and Regenerative Medicine Center at Baylor College of Medicine, and his colleagues here and abroad showed that...


Word of the Day
sough
  • A murmuring sound; a rushing or whistling sound, like that of the wind; a deep sigh.
  • A gentle breeze; a waft; a breath.
  • Any rumor that engages general attention.
  • A cant or whining mode of speaking, especially in preaching or praying; the chant or recitative characteristic of the old Presbyterians in Scotland.
  • To make a rushing, whistling, or sighing sound; emit a hollow murmur; murmur or sigh like the wind.
  • To breathe in or as in sleep.
  • To utter in a whining or monotonous tone.
According to the OED, from the 16th century, this word is 'almost exclusively Scots and northern dialect until adopted in general literary use in the 19th.'
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