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Cell Infected By Virus Viewed For The First Time By MSU Scientists
The June cover of the Journal of Virology features a photograph of the unusual effects on a cell infected by a virus. Montana State University researchers were the first to view the virus, which they collected from a boiling, acidic spring in Yellowstone.
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Drop In Access To Abortion Would Reward Antiabortion-Rights Violence, Opinion Piece Says
After the murder last month of Kansas abortion provider George Tiller, "there is a very real danger" that the availability of abortion later in pregnancy "will end in this country -- not after public deliberation, legislative debate and majority vote, but because antiabortion absolutists on the fringe have intimidated and blacklisted doctors and successfully threatened violence against them," Jim Buie, author of the blog The Buie Knife, writes in a Newsweek.com opinion piece. Buie writes that his parents in the early 1950s chose to institutionalize his three-year-old-brother, who was born with severe Down syndrome, after their attempts to care for him left them with "severe emotional distress" and unable "to meet the needs of their healthy children."Buie continues that he "cannot say that the option of a late-term abortion would have been the right one for my parents." However, "some of the arguments advanced by pro-life forces disturb me," he says, especially a "tendency to romanticize, sentimentalize and idealize life with a cute, forever-young Down-syndrome "angel child."" Buie adds, "It"s an argument I find off-putting, especially when it"s espoused by people who have never been through the wringer trying to care for a child whose disability level is on the most severe end of the scale." He continues, "At the same time, it is very disturbing that until recently, the majority of Down-syndrome fetuses were aborted without expectant mothers receiving proper information or support."Because of Tiller"s murder, it is "possible there won"t be any doctors in the country willing to perform" abortion later in pregnancy, "even if prenatal tests indicate severe retardation," according to Buie, who adds that this would mean that "domestic terrorism could win." He concludes, "It would mean that parents like my own would no longer have a choice, and would instead be forced to endure the same harsh realities that were present in the 1950s" (Buie, Newsweek.com, 6/17).
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Anemia Associated With Greater Risk Of Death In Heart Disease Patients
A new study appearing in Congestive Heart Failure has found that the presence of anemia in patients with chronic heart failure is associated with a significantly increased risk of death. The findings also show that anemia is associated with a poorer degree of left ventricular function and a lower left ventricular ejection fraction, an objective measure of cardiac function.
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Chromosomal Problems Affect Nearly All Human Embryos; Discovery May Explain Low Fertility Rates In Humans

For the first time, scientists have shown that chromosomal abnormalities are present in more than 90% of IVF embryos, even those produced by young, fertile couples. Ms Evelyne Vanneste, a PhD student in the Centre for Human Genetics and the University Fertility Center, Leuven University, Belgium, told the 25th annual conference of the European Society of Human Reproduction and Embryology today (Wednesday July 1), that the surprising finding meant that current techniques used in preimplantation genetic screening (PGS), where embryos are screened genetically in order to select the best embryo for transfer, do nothing to improve pregnancy and live birth rates. Indeed, it can lead to potentially viable embryos being discarded, she said. Ms Vanneste and her team studied each cell from 23 three or four day-old IVF embryos from young (less than 35 years old), fertile couples who had asked for preimplantation genetic diagnosis (PGD). PGD is carried out where one or both parents have a known genetic abnormality, in this case an X-linked disorder or the microdeletions (loss of a tiny piece of a chromosome) that can cause such disorders as the cancer predisposition syndrome neurofibromatosis type 1. The embryos are screened to avoid the implantation of one carrying that abnormality. Such embryos are the most representative of normal human embryogenesis, the process that begins once an egg has been fertilised. Using new technologies that can detect chromosomal aberrations in the whole genome (all human chromosomes) of a single cell, the team was able to screen embryonic cells at a much higher resolution than previously, and hence identify more chromosomal abnormalities than has been possible using the current technique, fluorescent in situ hybridisation (FISH), which can only analyse ten of the approximately 32,000 genetic regions at the same time. "Until now, the majority of studies analysing the genetic composition of human embryos used low resolution techniques on embryos derived from couples with fertility problems who are at risk for embryonic aneuploidy, an aberrant number of chromosomes, such as three copies of chromosome 21 that results in Down"s syndrome. Therefore, little was known about the frequency and type of chromosomal imbalances in embryos from normal, fertile women," said Ms Vanneste. "Our new technique has enabled us to show that chromosomal abnormalities are far more common and complex than previously anticipated, even in embryos from young, normal fertile couples. This leads us to believe that such abnormalities must be present in all human IVF-ICSI embryos. "Although in vitro culture conditions are known to have a limited influence on the rate of chromosomal imbalances in IVF/ICSI embryos, it is probable that the chromosome instability observed in vitro also occurs in spontaneous pregnancies since, at most, 30% of human conceptions result in a live birth and more than 50% of spontaneous abortions carry chromosomal aberrations. The high rate of chromosomal abnormalities is almost certainly responsible for the low fecundity of humans compared with other mammals," she added. The scientists say that their work has important implications for preimplantation genetic screening (PGS) in fertility treatment. PGS is routinely used in many fertility centres for couples who encounter problems with conception, particularly for advanced maternal age, repeated failure of implantation, repeated miscarriages, or severe male fertility problems. In PGS, a single cell is removed from the early embryo for genetic testing, since it is hypothesised that the selection of chromosomally normal embryos for uterine transfer would increase the live birth rate and decrease the spontaneous abortion rate per embryo transferred. "Although PGS is promoted as a way of increasing the chances of a successful pregnancy," said Ms Vanneste, "there has never been any significant evidence that it does, in fact, increase live birth rates after IVF. Our findings have shown that almost every cell of a human embryo carries a different genetic composition; consequently, the one cell that is analysed genetically is not representative of the rest of the embryo. If the tested cell is genetically abnormal, the embryo will not be transferred. But the rest of the embryo might be normal and develop into a healthy person. Therefore, the use of PGS means that potentially viable embryos will be discarded. The prevalent chromosomal instability in all early human IVF embryos explains the failure of PGS to improve the live birth rate per embryo transferred. "I think that we have made a crucial breakthrough that will change the way we do preimplantation genetic diagnosis and PGS and help to advance our ability to improve human fertility," said Ms Vanneste. European Society of Human Reproduction and Embryology


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