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Tag: "sexual" at biology news

Blood test may help signal tumor's remission, return in throat cancer patients

...t month, other NIH-supported doctors reported that sexual transmission of human papillomavirus is strongly associated with throat cancer, especially in cancers arising from the tonsils and base of the tongue. In the largest long-term study of its kind, NIH and University of Michigan researchers tested th...

Gene therapy delivery of nerve growth factors reverses erectile dysfunction in animal model

...y to achieve or maintain an erection necessary for sexual intercourse. Because of the variability of symptoms, estimates of the incidence of ED vary but range from 15 million to 30 million affected men in the United States. ED is frequently associated with damage to the cavernous nerve that results from sur...

Bigger horns equal better genes

...e. The ibex's horns are considered a "secondary sexual trait". Researchers believe the horns help males successfully mate because they display genetic quality to females and also help to "win" physical battles and achieve high social rank among their competitors. "We've learned from other species, su...

ASU research shows connection between testosterone, dietary antioxidants and bird coloration

...earchers in animal behavior often study what keeps sexual signals like bright colors or elaborate songs ‘hon...hought of as a double-edged sword as it relates to sexual signals, because it enhances trait production but comes at a health price to the animal.” “This s...

Male circumcision overstated as prevention tool against AIDS

...he risk of transmission by some 50% to 60% in each sexual encounter, reducing single encounter transmission rates alone cannot control the epidemic. The reason is that individuals in highly infected countries have multiple contacts with the infected so reducing transmission rates only defers the inevitable....

Corals -- More complex than you?

...y fast. Corals which take at least 5years to reach sexual maturity (compared with the laboratory fruitfly whose generation lasts only 3-4 weeks), and which have long and overlapping generation times, may thus be a living ‘museum?of ancestral animal genes. However corals use all those genes to produce on...

Risk of lymphoma increases with hepatitis C virus infection

...ily fluids -- via shared needles, open wounds, and sexual contact, among other means. HCV is also known to cause cirrhosis and liver cancer. "Although the risk of developing lymphomas is small, our research suggests that screening of HCV-infected individuals could identify conditions which may lead to ...

Warts vaccine -- 1 of many in pipeline

... Year 2006 Professor Ian Frazer and trial manager, sexual health specialist Dr David Jardine More than 200 patients in China and Australia have taken part in the trial so far run from the Princess Alexandra (PA) Hospital. "The new treatment has so far proven safe, and we want to know if it improves the...

Asexual worm quickly adapts to soil contamination

...ial and that they adapt to stress less easily than sexual species. At present these asexual species are used as test organisms in ecotoxicological risk evaluations. The question now arises as to whether they are suitable for this purpose. The results of this study are important for the development of pr...

The quest for an effective HIV vaccine presents new possibilities, challenges

...ages of infection--are most likely to infect their sexual partners. A preventive vaccine given before exposure to HIV might stifle the initial burst of virus, better control virus levels and potentially reduce that person’s ability to infect other people, Drs. Johnston and Fauci assert. Vaccines of this...

In young mice, gregariousness seems to reside in the genes

... of the interaction itself." As the mice neared sexual maturity, the genetic influence on social behavior...marily in the context of behaviors associated with sexual reproduction, territorial defense and parental care. Those studies, say Lahvis and Panksepp, do not ...

Risk of HIV transmission highest early in infection

...are to be able to counsel them to modify high-risk sexual behavior and desist from transmitting the virus.? He suggested the development of affordable tests such as polymerase chain reaction assays to directly monitor the presence of the virus, instead of relying on the current method of antibody screenin...

Female chimps keep the bullies at bay

...ous cycles may be a female strategy to reduce male sexual coercion." Indeed, male chimpanzees use coercive tactics such as physical aggression against females, forced copulation, harassment and intimidation to increase their reproductive success. The opportunity for males to coerce females is reduced wh...

Male reindeer inflate a large air sac in the neck region to emit their hoarse rutting calls

...ocal sound and neck contour, may contribute to his sexual prowess and reproductive success. The results of this research have recently been published in Journal of Anatomy. As in other species with harem-like mating systems, the voice organs of reindeer differ according to gender. Adult males have a much l...

Africa's first large-scale HIV vaccine study launches

... less likely to become HIV infected when they have sexual relations with women. As a result, access to medical circumcision also will be provided to male participants who choose to undergo the procedure. ...

A rarity among arachnids, whip spiders have a sociable family life

... feelers, siblings stick together until they reach sexual maturity, and all mix in social groups. This is su...teractive groups. As soon as the siblings approach sexual maturity though (about 12 to 14 months of age), they start showing aggressive, life-threatening beha...

Scientists sequence genome of parasite responsible for common sexually transmitted infection

...vaginal discharge, vaginal odor, discomfort during sexual intercourse and urination, irritation and itching ...ity to HIV infection and may transmit HIV to their sexual partners. Pregnant women with trichomoniasis may deliver a low birthweight (less than five pounds) o...

Bioluminescence at the service of a novel cerebral imaging technique

...rences between males and females (demonstration of sexual dimorphism) or as a function of age (changes to cerebral activity during ageing). The Drosophila is an excellent model for the study of ageing and longevity, because it has recently been shown that flies endowed with a mutation of the insulin re...

Erectile dysfunction in diabetes is due to selective defect in the brain

...(STZ) to induce diabetes were used as they exhibit sexual and behavioral symptoms similar to those found in diabetic men with sexual dysfunction. The researchers focused on the paraventricular nucleus (PVN) of the hypothalamus, l...

No-scalpel vasectomies by skilled surgeons may speed recovery

...ecovery with a quicker resumption of postoperative sexual activity. The smaller trial included 100 participants treated at a single site in Denmark. None of the eight doctors had substantial experience in the no-scalpel technique. Training was limited to an instructional video and one supervised procedur...

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