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Latest Germ cells Stories

2011-08-10 06:44:15

(Ivanhoe Newswire) "“ New scientific findings are crucial for infertility research and treatment and for a more comprehensive understanding of germ cell biology in general. Researchers have now found a way to turn mouse embryonic stem cells into sperm. Investigators coaxed mouse embryonic stem cells into sperm precursors, called primordial germ cells (PGCs), and discovered that these cells were able to produce healthy sperm. The researchers say that such in vitro reconstitution of germ...

2011-08-04 14:03:25

Researchers have found a way to turn mouse embryonic stem cells into sperm. This finding, reported in the journal Cell in a special online release on August 4th, opens up new avenues for infertility research and treatment. A Kyoto University team has coaxed mouse embryonic stem cells into sperm precursors, called primordial germ cells (PGCs), and shown that these cells can give rise to healthy sperm. The researchers say that such in vitro reconstitution of germ cell development represents one...

2011-08-04 13:36:52

Research could lead to techniques to improve fertilization in humans In new research that could have implications for improving fertilization in humans and other mammals, life scientists studied interactions between individual sperm and eggs in red abalone, an ocean-dwelling snail, and made precise chemical measurements and physical models of these interactions. They are the first scientists to do so. By simulating the natural habitat of the abalone in the laboratory, the scientists were able...

2011-04-18 13:56:57

It was previously thought that land plants evolved from stonewort-like algae. However, new research published in BioMed Central's open access journal BMC Evolutionary Biology shows that the closest relatives to land plants are actually conjugating green algae such as Spirogyra. Ancestors of green plants began to colonise the land about 500 million years ago and it is generally accepted that they evolved from streptophyte algae (a group of green, fresh water algae). But this group of algae is...

2011-04-14 21:03:08

Egg cells failing to properly arrange chromosomes Washington State University researchers have confirmed a critical step in cell division that results in age-related miscarriages and birth defects, including Down syndrome. Writing in the upcoming issue of the journal "Current Biology," the researchers say they recreated the conditions in which an egg cell will continue to undergo cell division without properly arranging its chromosomes, creating offspring with aneuploidy, or an abnormal...

2011-03-17 21:00:03

A team of researchers at the Instituto Gulbenkian de Ciência (IGC), Portugal, discovered that pollen, the organ that contains the plant male gametes, communicate with the pistil, their female counterpart, using a mechanism commonly observed in the nervous system of animals. This study not only reveals a new mechanism which underlies reproduction in plants, but also opens an exciting new avenue in the study of how cell-cell communication is conserved between animals and...

2011-02-02 14:50:50

Study uncovers genetic hierarchy in plant sperm formation Biologists at the University of Leicester have published results of a new study into the intricacies of sex in flowering plants. They have found that a gene in plants, called DUO1, acts as a master switch to ensure twin fertile sperm cells are made in each pollen grain. The research identifies for the first time that DUO1 switches on a battery of genes that together govern sperm cell production and their ability to produce seeds.. The...

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2010-10-28 09:30:00

Researchers have linked a chemical compound commonly used in the making of plastics to low-sperm counts and other reproductive issues among Chinese factory workers, according to a study published in the latest edition of the journal Fertility and Sterility. The study, which was funded by the National Institute of Occupational Safety and Health (NIOSH) and completed at the Kaiser Permanente Division of Research in Oakland, California, analyzed the urine levels of male workers in China. Those...

2010-10-26 00:01:43

Researchers have now found a way to propagate primary human Sertoli cells in the laboratory -- the first step, say investigators, to developing an artificial human testicle for reproductive research. Derived from the testis, it has been difficult to maintain Sertoli cells, the "nurse" cells responsible for overseeing sperm production, outside of the human body. San Francisco, CA (Vocus) October 25, 2010 After more than 30 years of unsuccessful efforts by numerous investigators,...

2010-10-25 16:13:00

Fertility procedures such as in vitro fertilization (IVF) require a couple and the doctor to place the risky bet that the multiple eggs they choose to fertilize will produce an embryo that will thrive in the uterus. Researchers cannot biopsy eggs directly because that would destroy them, but a new discovery by professors at Brown University and Women & Infants Hospital could lead to new insights about how eggs develop and ultimately inform judgments about how the embryos they produce will...