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Tag: "mother" at biology news

Pregnant mom's exposure to flu vaccine kick-starts fetal immune system

... an immune response against allergens to which the mother has been exposed, and this may have an effect on the development of allergic sensitivity (e.g. eczema and asthma) later in an infant’s life. However this hypothesis has remained controversial because of an inability to detect antigen-specific T cells...

Study shows lizard moms dress their children for success

...pect of appearance. Even more exciting is that the mother has different patterns at her disposal, so she can...hways by which an extra dose of estradiol from the mother can help to resolve this problem. In one pathway, females increased the amount of estradiol to th...

Plants recognize their siblings, biologists discover

...ley. “What I’ve found is that plants from the same mother may be more compatible with each other than with plants of the same species that had different mothers. The more we know about plants, the more complex their interactions seem to be, so it may be as hard to predict the outcome as when you mix differe...

Children of smokers have more than 5 times higher levels of a nicotine toxin

...t in Archives of Disease in Childhood. Having a mother that smokes was found to have the biggest independent effect on cotinine in the urine – quadrupling it. Having a smoking father doubled the amount of cotinine, one of chemicals produced when the body breaks down nicotine from inhaled smoke to get rid...

New vaccine prevents CMV infection and disease in mice

... children are born with the virus passed on by the mother in utero, and 15 percent of those children will show symptoms such as hearing loss, mental retardation, motor or learning disabilities. Because the host’s natural immune system can protect from the disease but can’t rid the body of the virus, peopl...

HIV and malaria combine to adversely affect pregnant women and their infants

...gather in the placenta resulting in damage to both mother and developing infant. First-time mothers are particularly susceptible to PAM whereas women in subsequent pregnancies become protected against PAM. Having HIV results in this loss of protection and makes them as susceptible as first-time mothers. ...

Mule deer moms rescue other fawns

...lping many other animals. In contrast, a whitetail mother waits to assess whether a fawn is her own before she steps in to defend it. As a result, whitetail fawns suffer considerably more predation during the first months of life than do mule deer fawns." Mule deer may have developed a more effective agg...

Resistant HIV quickly hides in infants' cells

...transmission of drug-resistant strains of HIV from mother to child is still a problem, and much is unknown concerning how such transmission affects the responses of infants to various drug treatments. The study, conducted by Deborah Persaud, MD, of Johns Hopkins University School of Medicine and collea...

Premature births may be linked to seasonal levels of pesticides and nitrates in surface water

...l status, alcohol or cigarette use, or whether the mother was an urban, suburban or rural resident. Pesticide and nitrate levels in surface water were also highest in May-June and lowest in August –September, according to the U.S. Geological Survey. For the past four years, Dr. Winchester and colleagues...

Male-killing bacteria makes female butterflies more promiscuous

... The male-killling bacterium is transmitted from mother to son and actually kills the son before the embryo hatches into a caterpillar. Only female offspring of female carriers of the bacteria can survive, which can lead to the male population being as low as one male to every hundred females in some area...

The penalty of having a sister -- why sibling sex matters for male saiga antelopes

... seems there are limitations in the ability of the mother to provision mixed twin litters in the womb," she said. The researchers point out that mixed-sex litters have been shown to have an impact on animal health elsewhere in the animal world. In dairy cows for example, it is well known that calves fro...

Stem cells act through multiple mechanisms to benefit mice with neurodegenerative disease

...hildren's Neurobiological Solutions Foundation and mother of a brain-injured child. "The CNS Foundation is proud to have contributed major funding for this research along with A-T Children's Project on behalf of the 14 million special-needs children in this country alone." ...

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

... are few reports of other creatures eating them, a mother nearby may offer young amblypygids some protection...r to each other or their mother. Now and then, the mother threatened Rayor. The adolescents, though, tended to scurry away and hide when faced with threat. Wh...

Why aren't humans furry? Stone-Age moms could be the answer

...' paper describes Stone Age societies in which the mother of a newborn had to decide whether she had the res...wborn's appearance probably influenced whether the mother kept or abandoned it. An attractive baby was more likely to be kept and reared. Harris' theory is...

Tumor-suppressor gene is critical for placenta development

...at controls nutrient and oxygen exchange between a mother and her fetus during pregnancy, and perhaps in miscarriages. Those conclusions come from a new study of the retinoblastoma (Rb) gene in mice. In humans, this gene, when mutated, raises the risk of a rare cancer of the eye called retinoblastoma. Two...

New findings blow a decade of assumptions out of the water

The Atlantic Ocean doesn't receive the mother lode of fixed nitrogen, the building block of life, after all. Instead, comparing fathom for fathom, the Pacific and Indian oceans experience twice the amount of nitrogen fixing as the Atlantic, say researchers in the Jan. 11 issue of Nature. The ti...

No sex for 40 million years? No problem

...y by producing eggs that are genetic clones of the mother ?there are no males. Fossil records and molecular data show that bdelloid rotifers have been around for over 40 million years without sexually reproducing, and yet this new study has shown that they have evolved into distinct species. Using a com...

Experimental vaccine given during pregnancy reduces stillbirths from common virus

...nt in daycare could give the virus to her pregnant mother by kissing her on the lips, said Dr. Schleiss. The virus can enter through mucosal surfaces such as the mouth or breaks in the skin. It can also be transmitted through nasal secretions, blood transfusions, and sexual contact. Most adults will beco...

Molecular motors and brakes work together in cells

...w "daughter" microtubule grows and moves along the mother microtubule. In time, the daughter grows beyond the end of the mother to ultimately produce two microtubules, connected by the cross-linking MAP ase1p. "Imagine that ...

A potential biological cause for sudden infant death syndrome

... must adjust from being totally dependent on their mother to breathing on their own and maintaining their own blood pressure. If the brainstem serotonin system is defective or still immature, this transition to total independence in the control of vital functions may be impaired during the crucial first si...

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