Tag: "nicotine" at biology news

Nicotine shows anti-depressant effects in an animal model of depression

...ave recently observed the antidepressant effect of nicotine in Wistar-Kyoto (WKY) rats, a putative behavioral ...ugh cigarette smoke contains over 3,000 chemicals, nicotine is the primary constituent that acts on the brain. As a result, scientists have suggested that ciga...

Caterpillar saliva beats plant defenses

.... These defensive mechanisms include production of nicotine -- a neural toxin, and digestive protease inhibito... on by unaltered corn earworms had 26 percent less nicotine content than those fed on by caterpillars that did not secrete saliva. To show how increased nicoti...

Women with vaginal cancer likely to have been exposed to HPV-16, the virus that causes genital warts

...only associated with lung cancer, Daling said that nicotine is a strong risk factor for virtually all forms of...said. "One theory is based on the observation that nicotine inhibits apoptosis, the technical term for cell death. This is the pathway our body uses to eliminat...

Relative of snake venom toxin may aid in understanding nicotine addiction

..., lynx1, may be a new tool with which to probe how nicotine and other drugs activate pleasure centers of the b...the researchers say they may help in understanding nicotine addiction or possibly human genetic diseases caused by defective prototoxins. Howard Hughes Medical ...

Medicines, caffeine and antibacterial soap among contaminants found in American streams

... addition to medications, caffeine and cotinine, a nicotine breakdown product, also were among the most frequently detected compounds. So too were cholesterol and coprostanol, steroids that can be indicative of fecal contamination. Rounding out the list of most frequently detected compounds were the insect re...

Scientists find alcohol, drugs boost endorphins in key forebrain region

...rchers administered alcohol, cocaine, amphetamine, nicotine and an inactive salt solution to laboratory rats v...but we dont know why. It could be that the dose of nicotine we used was too low or that nicotine does not cause this same effect and instead acts in some other ...

Age at first drink: What does it really mean?

...gues found to be associated with an early AFD were nicotine dependence, illicit drug use and dependence, antisocial personality and conduct disorder, low school achievement, low behavioral constraint (people with low constraint act impulsively, caring little about adhering to societal norms), and a reduced P3...

Abnormalities in stress hormone response among alcoholics

...to affect serotonin function, and both smoking and nicotine withdrawal have been associated with changes in LH...te the strong association with alcoholism, neither nicotine dependence nor ASPD affected hormonal responses to fenfluramine. "Based upon these findings," s...

Smoking, heavy drinking and poor nutrition tend to cluster

...rding to the researchers, the relationship between nicotine and alcohol is not well understood. "Chronic use ...y increase tolerance to the other, or, conversely, nicotine may cause a stimulating effect that is depressed by ethanol," said Betts. "Or, some individuals may...

Brief exposure to nicotine makes lasting mark on the brain

...ajor advance in understanding the process of nicotine addiction. The researchers discovered that nicotine uses a mechanism responsible for learning and memory to enhance the connections between ...

Caffeine in colas: 'The Real Thing' isn't the taste

"The marketing parallels between nicotine and caffeine are pretty stunning" The majority of ...etting and why. "The marketing parallels between nicotine and caffeine are pretty stunning," says Griffiths. "Both are psychoactive drugs. Until recently, c...

Drinking during pregnancy: American Indians and African Americans

...ior that involves harmful substances like alcohol, nicotine and caffeine." One of the obstacles that researchers and public health officials still face, she noted, is a basic lack of understanding of human behavior. "We still don't fully know how one's behavior relates to one's state of health and well-bein...

Tobacco farm workers may contract tobacco sickness, Wake Forest study shows

...r after a rain. The disease is attributed to acute nicotine poisoning caused by contact with nicotine on the plants, which is rapidly absorbed through the skin. "This is the first survey research to do...

Nicotine may have another side effect: heavy drinking

...est of smokers. A recent study has discovered that nicotine (in the form of tobacco) increases alcohol consump...n smoking is nicotine. So we askedourselves: Does nicotine increase alcohol consumption?" Of the five experiments that comprised L's study, three confirmed the...

The future of planet earth: scientific challenges in the coming century

...lude acetaminophen, caffeine, codeine, cotinine (a nicotine metabolite), 17b-estradiol (a hormone), and sulfamethoxazole (an antibiotic). For many of these compounds, the USGS study will provide the earliest data on their environmental occurrence in the nation. The impacts of these chemicals on humans or aq...

Exposures to second-hand smoke lower than believed, ORNL study finds

...particulate matter, solanesol, 3-ethenyl pyridine, nicotine and RSP. Other constituents of environmental tobac... the highest levels of environmental tobacco smoke nicotine levels in workplaces where smoking is permitted to be between 9.41 and 14.9 micrograms per cubic met...

University of Pittsburgh-led team finds biological reason for women's increased risk of smoking-related lung cancer

...urgh-led research team, which also discovered that nicotine found in cigarettes induces gene activity. Their ...ittsburgh-based research team also discovered that nicotine found in cigarettes stimulates expression of the GRPR gene in lung cells. "Our research str...

Younger people are at greater risk for alcohol problems

...hared' with other disorders such as depression and nicotine dependence. "No single gene causes alcoholism," noted Stoltenberg. Hesselbrock added that "genes do not predetermine, they only increase risk." Yet not even a body of genes, let alone a solitary gene, entirely explains the conundrum. "When you ...

Carilion, Virginia Tech, U.Va. create biomedical institute -- Virginia Tech forms optical sciences and engineering research center

... has emerged as a way to deliver medication (as in nicotine patches). Its useas a diagnostic tool has been limited. Potential investigations include using patches for:1) diagnosis of target medical or animal conditions, 2) detection of illegal substances, and3) measurement of specific body chemistry. The patc...

Smells may trigger alcohol craving, and relapse, among alcoholics

...ing treatment. Similar relapse rates for alcohol, nicotine and heroin addiction suggest that the relapse mechanisms for several addictive disorders may share common biochemical, behavioral or cognitive components. Yet no controlled studies have definitively shown any single or combined intervention that pre...

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