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PubMed2001

Regional central nervous system densities of delta-opioid receptors in alcohol-preferring P, alcohol-nonpreferring NP, and unselected Wistar rats.

The densities of delta-opioid receptors in the central nervous system of alcohol-naive, adult, male, alcohol-preferring P, alcohol-nonpreferring NP, and Wistar rats were examined with the use of quantitative autoradiography. Slides with coronal 20-microm sections through the regions of interest were incubated in 5 nM [3H]-[D-Pen(2),D-Pen(5)]enkephalin (DPDPE) to label delta(1)-opioid receptor sites. Nonspecific binding was determined in the presence of 10 microM naloxone. Significant differences between the P and the NP rat lines were found in numerous cortical regions, the basolateral amygdala, and the posterior hippocampus, with 10%-20% lower [3H]-DPDPE binding found in the P line. In most regions examined, binding levels in the Wistar rats were intermediate between those of the P and the NP rats. Significantly lower [3H]-DPDPE binding levels in the P rat may indicate fewer delta(1)-opioid receptors or decreased binding affinity. The lower binding in certain limbic regions, such as the basolateral amygdala and posterior hippocampus, as well as cortical differences in the P rat may be associated with the divergent alcohol drinking behaviors found between the P and the NP lines.

Alcohol Drinking↗
PubMed2002

Low ethanol sensitivity and increased ethanol consumption in mice lacking adenosine A2A receptors.

We have shown previously that the severity of handling-induced convulsions during ethanol withdrawal was reduced in A2A receptor knock-out (A2AR-/-) mice. In the present report, we further characterize the role of adenosine A(2A) receptors in ethanol consumption and neurobiological responses to this drug of abuse. Male A2AR-/- mice showed increased consumption of solutions containing 6 and 20% (v/v) ethanol compared with wild-type (A2AR+/+) control mice; female A2AR-/- mice showed increased consumption of solutions containing 6 and 10% ethanol. This slightly higher ethanol consumption was also related to increased ethanol preference. In contrast, A2AR-/- mice showed normal consumption of solutions containing either sucrose or quinine. Relative to A2AR+/+ mice, A2AR-/- mice were found to be less sensitive to the sedative effect of 3.0 gm/kg ethanol, as measured by more rapid recovery from ethanol-induced loss of righting reflex, and to the hypothermic effects of 1.5, 3.0, and 4.0 gm/kg ethanol, although plasma ethanol levels did not differ significantly between the two genotypes. The selective adenosine A2A receptor antagonist ZM 241385 (4-(2-[7-amino-2-(2-furyl)[1,2,4]triazolo[2,3-a][1,3,5]triazin-5-ylamino]ethyl)phenol) (10-30 mg/kg) significantly attenuated ethanol-induced (4.0 gm/kg) hypothermia in CD1 mice. To assess whether ethanol administration would induce differential tolerance in A2AR-/- and wild-type mice, we administered ethanol (3.0 gm/kg) over 4 consecutive days and found no difference in the development of tolerance; however, female A2AR-/- mice showed a lower tolerance-acquisition rate. These data suggest that activating the A2A receptors may play a role in suppressing alcohol-drinking behavior and is associated with the sensitivity to the intoxicating effects of acute ethanol administration.

Administration, Oral↗
PubMed1993

Effects of ozone and nitrogen dioxide on drinking and eating behaviors in mice.

Male ICR mice were exposed continuously to ozone (O3) and nitrogen dioxide (NO2) for 7 days to examine the effects on drinking and eating behaviors. Ozone at 0.1 ppm did not affect drinking and eating activities, whereas drinking activity decreased in a concentration-dependent manner to 47.7, 12.8, and 3.0% of the control value with 2-day exposures to 0.2, 0.4, and 0.8 ppm O3, respectively, and eating activity decreased to 35.2 and 8.7% of the control value at 0.4 and 0.8 ppm O3, respectively. Body weight also decreased markedly by 2.0, 4.6, and 7.5 g at 0.2, 0.4, and 0.8 ppm O3, respectively. These decrements reached a maximum on the second day of exposure. However, alterations in drinking and eating activities and body weight were transient, leading to recovery during the continuous O3 exposures. The recovery processes were dependent on the concentrations of O3. Nitrogen dioxide at 4 ppm did not affect drinking and eating activities, whereas drinking activity decreased in a concentration-dependent manner to 56.8, 8.3, and 18.7% of the control value with 2-day exposures to 6, 8, and 12 ppm NO2, respectively, and eating activity decreased markedly to 21.8 and 16.4% at 8 and 12 ppm NO2, respectively. Body weight also decreased by 2.5, 5.5, and 6.1 g at 6, 8, and 12 ppm NO2, respectively. These decrements reached a maximum on the second day of exposure. As in the O3 exposures, the decrements in drinking and eating activities and body weight were transient and recovered during the continuous exposures to NO2 depending on the concentrations of NO2. Drinking and eating activities and body weights of mice that had been previously exposed to 12 ppm NO2 for 7 days did not show changes when the mice were exposed to 0.4 ppm O3 9 days after NO2 exposure. The present study demonstrates that photochemical oxidants suppress drinking and eating behaviors in mice and that they recover thereafter under the continuous exposure conditions.

Animals↗
PubMed1975

A behavioral intervention program for chronic public drunkenness offenders.

A reinforcement contingency management system for ten chronic public drunkenness offenders was evaluated for short-term effects. Chronic inebriates were provided with required goods and services through skid row community agencies contingent on their sobriety. Intoxication resulted in a five-day suspension of all goods and services. Excessive drinking behavior was assessed by direct observations of intoxication and by randomly administered breath alcohol analyses. As a result of this intervention, subjects substantially decreased their number of public drunkenness arrests and their alcohol consumption, and increased their number of hours employed. No such changes were observed in a control group that received services on a noncontingent basis. Longer-term research studies of one to two years rather than a few months would be required before any widespread use of this approach would be warranted.

Alcohol Drinking↗
PubMed1990

Initiating ethanol drinking in a simian social group in a naturalistic setting.

We examined in nine group-living, male Japanese Snow monkeys the initiation of alcohol-drinking behavior in an enriched environment where both social and nonsocial stimuli could influence drinking. The monkeys usually could move freely between an indoor shelter and a large outdoor corral, which contained three drinkometers. During daily 2-hr sessions in pre- and post-training periods (with food and water available ad libitum), the drinkometers held (on different days) Koolaid-saccharin, water, water with 5% ethanol, Koolaid-saccharin with 5% ethanol, or Koolaid-sucrose with acetic acid (matched in calories and palatability to Koolaid-saccharin with 5% ethanol). Between pre- and post-training periods was a long training period, in which Koolaid-saccharin with various ethanol concentrations was presented with the daily food ration in 2-hr drinking sessions. On other selected training days, water with 5% ethanol was presented. During training sessions some monkeys drank high doses; others did not. During the period of peak drinking, the daily mean ethanol consumption ranged among animals from 0.54-1.99 ml/kg. Blood ethanol concentrations then sometimes exceeded 100 mg/dl. During the post-training period, with return to ad libitum food and water, consumption declined from these peaks, but remained significantly higher than pretraining consumption; the ethanol solution was established as a reinforcer. Monkeys differed significantly in the extent of this pre/post increase. In both pre- and post-training periods, consumption was significantly greater when all three drinkometers operated, compared with only one. On pretraining days when only one drinkometer operated, more dominant animals drank significantly more than less dominant animals; this difference disappeared by the post-training period, as less dominant animals learned to use the drinkometers at times when the dominant animals eschewed the machines. Pretraining consumption did not predict (among animals) post-training consumption. Before, during, and after training, these animals drank less of both alcohol and control solutions than did members of another species, which we had studied in smaller indoor pens. We discuss possible explanations and implications.

Alcohol Drinking↗
PubMed1981

Water-drinking as ictal behavior in complex partial seizures.

The urge to demand, pour, and drink water at the time of an attack was encountered in 20 patients who had seizures with complex partial symptomatology. Two patients were studied with bitemporal stereotaxically implanted depth electrodes. Drinking was associated with electrographic and clinical seizures starting in the amygdala, hippocampus, and parahippocampal gyrus. Sometimes, this was the only clinical manifestation of an attack, and its significance would not have been recognized without depth recording. Ictal drinking was never encountered in patients without electroencephalographic evidence of temporal epileptic abnormality, and therefore seems to have localizing significance.

Adolescent↗
PubMed1977

The syndrome of abuse dwarfism (psychosocial dwarfism or reversible hyposomatotropism).

In abuse dwarfism the behavioral signs include some or all of the following: (1) a history of unusual eating and drinking behavior, reversible on change of domicile, such as eating from a garbage can and drinking from a toilet bowl, stealing food, alleged picky eating and rejecting food at the table, polydipsia and polyphagia, possibly alternating with vomiting and possibly also with self-starvation; (2) a history of such behavioral symptoms as enuresis, encopresis, social apathy or inertia, defiant aggressiveness, sudden tantrums, crying spasms, insomnia, eccentric sleeping and waking schedule, pain agnosia, and self-injury, all occurring only in the growth-retarding environment; (3) retarded motor development, with improvement on removal of the child from the domiclle of abuse; (4) retarded intellectual growht, reversible on change of domicile by as much as 30 to 50 IQ points; and (5) a history of pathologic family relationships, including unusual cruelty and neglect, either somatic or psychic or both.

Adolescent↗
PubMed1995

Factorial validity and equivalency of the Alcohol Expectancy Questionnaire Tension-Reduction Subscale across gender and drinking frequency.

The first aim of the present study was to examine whether the items on the Alcohol Expectancy Questionnaire Tension-Reduction Subscale (TR-AEQ) measure a common underlying factor. The second and third aims, respectively, were to assess the factorial invariance of the TR-AEQ across gender and drinking frequency. Subjects were 503 social-drinking college undergraduates. Confirmatory factor analyses indicated that a common-factor model with seven pairs of correlated disturbances fit the data well. Equivalence testing yielded factorial invariance across gender and partial factorial invariance across drinking frequency. These data support the factorial validity of the TR-AEQ and have implications for psychometric assessment and the evaluation and identification of problem drinking behavior.

Adolescent↗
PubMed1995

Dopaminergic neurons in the zona incerta modulates ingestive behavior in rats.

The zona incerta, located in the ventral thalamus, is a site of convergence of signals related to drinking. In the present experiments, agonists and antagonists of dopamine receptors were injected into the ZI of animals deprived of water overnight. Injection of 53 nM dopamine or the D2 dopamine receptor agonist PPHT caused a reduction of water and food intake, while the injection of the D1 receptor agonist SKF38393 had no effect. The current results suggest that dopamine injected into the ZI exerts inhibitory influences on drinking behavior mediated by D2 type receptor.

Animals↗
PubMed2006

A pain model after gynecologic surgery: the effect of intrathecal and systemic morphine.

BACKGROUND: Despite recent recognition that visceral pain differs from somatic pain in its neurophysiologic basis and treatment modalities, most laboratory studies of postoperative pain use a model of superficial somatic injury, and there is no model of postoperative pain after gynecologic surgery. We describe spontaneous behavior in rats after laparotomy with or without noxious stimulation of the uterus and cervix to more specially address pain after gynecologic surgery. METHODS: Female Sprague-Dawley rats received inhaled anesthesia only, anesthesia with laparotomy, or laparotomy plus 60 min of tonic distension of the lower uterine segment and cervix, followed by video observation of spontaneous behavior. RESULTS: Compared with anesthesia alone, laparotomy decreased some spontaneous behaviors (drinking water, grooming, and exploration). Laparotomy plus uterocervical manipulation further decreased these behaviors and increased abnormal behaviors (licking of the lower abdomen and squashing posture of the pelvis to the floor). Intrathecal and systemic morphine restored spontaneous behavior and reduced abnormal behaviors, with minor differences between routes of administration. CONCLUSIONS: These data suggest that specific behaviors may distinctly reflect somatic and visceral components of postoperative gynecologic pain, and that this model may be used to test novel therapies to relieve pain in this setting.

Administration, Cutaneous↗
PubMed1998

Predictors of relapse in long-term abstinent alcoholics.

OBJECTIVE: The goals of this study were to examine the hazard of relapse during an average 11 years of follow-up in alcoholics who had achieved long-term abstinence and to determine predictors of later relapse. METHOD: Male alcoholics (N = 77) with at least 18 months of stable abstinence at time of entry were followed for 2 to 17 years (mean follow-up = 10.9 years). During follow-up, detailed information regarding relapse/abstinence and interim drinking behavior was recorded. Potential predictors of relapse collected at enrollment included past drinking history, severity of alcohol-related life problems, degree of neurocognitive impairment based on neuropsychological (NP) tests, psychological distress (MMPI) and past medical health. RESULTS: Twenty-four of 77 (31%) long-term abstainers relapsed during the follow-up period. The average annual hazard rate of relapse was 3.8% in the first 5 years of follow-up and 2.6% over the next 6-11 years. Based on Cox proportional hazard regression analyses, the only significant variables to predict relapse were MMPI Scale 4 (Psychopathic Deviate, relative risk = 3.16, 95% CI = 1.19-8.38) and prior history of alcohol-related life difficulty (i.e., citation for driving while intoxicated, relative risk = 2.64, 95% CI = 1.05-6.64) (chi2 = 14.2, 2 df, p < .001). CONCLUSIONS: There is approximately a 3% annual risk of relapse in alcoholics who have been able to achieve long-term abstinence, even after 5 years of abstinence. Alcoholics who resumed drinking had greater indicators of longer standing psychological trait disturbance, reflected in elevated MMPI Scale 4 and history of more alcohol-related social difficulties. Placing the present study in the context of previous research that focused primarily on predictors or relapse in the shorter term, it appears that, whereas mood disturbance predicts short-term outcome, more enduring personality traits predict long-term success in remaining abstinent.

Adult↗
PubMed2002

Alcohol counter-advertising and the media. A review of recent research.

Counter-advertising commonly is used to balance the effects that alcohol advertising may have on alcohol consumption and alcohol-related problems. Such measures can take the form of print or broadcast advertisements (e.g., public service announcements [PSAs]) as well as product warning labels. The effectiveness of both types of counter-advertising is reviewed using the Elaboration Likelihood Model as a theoretical framework. For print and broadcast counter-advertisements, such factors as their emotional appeal and the credibility of the source, as well as audience factors, can influence their effectiveness. Further, brewer-sponsored counter-advertisements are evaluated and received differently than are the more conventional PSA counter-advertisements. For warning labels, both the content and design of the label influence their effectiveness, as do audience factors. The effectiveness of those labels is evaluated in terms of the extent to which they impact cognitive and affective processes as well as drinking behavior.

Advertising↗
PubMedDate not supplied

Influences on children's attitudes toward alcohol consumption.

PURPOSE OF THE STUDY: To determine whether children's attitudes toward alcohol consumption changed as they grew older and to what extent peers might influence the decision to drink alcoholic beverages. METHOD: A cross-sectional descriptive study of 500 children ages 8-15 years was performed using a questionnaire. Data analysis included descriptive statistics and contingency analysis. RESULTS: Age was the only variable significantly related to decision making. Attitudes toward alcohol were more favorable in older children. Peer influence did not appear to affect drinking behavior. CONCLUSION: Older children (ages 14-15) are more favorably disposed to drinking than younger children. Children may be more influenced by parents than is realized. Parental guidance just prior to age 14 may be an effective intervention.

Adolescent↗
PubMed1988

Lack of similarity between the effect of lesions of the suprachiasmatic nucleus and subparaventricular hypothalamic zone on behavioral circadian rhythms.

Rats were submitted to electrolytic lesion of either the suprachiasmatic nucleus (SCN) or the subparaventricular hypothalamic zone (SPVH) and the effects on circadian behavioral rhythms were compared. While the SCN lesion abolished the circadian rhythmicity of all behavioral patterns, the SPVH lesion only abolished that of the eating and drinking behavior and reduced the amplitude of a behavioral item usually associated with REM sleep.

Animals↗
PubMedDate not supplied

Comparison of innate EEG parameters in rat lines selected for ethanol preference.

Through bidirectional selective breeding, lines of rats that differ greatly in their voluntary alcohol drinking behavior have been developed--namely, the alcohol-preferring (P) and high-alcohol-drinking (HAD) lines and the alcohol-nonpreferring (NP) and low-alcohol-drinking (LAD) lines. The present experiments were designed to determine if an association exists between ethanol preference and features of the electroencephalogram (EEG) during various sleep-wake behaviors. Of the EEG parameters measured, only theta activity in the hippocampus revealed differences in the lines. However, these differences were not generally associated with ethanol preference. The peak frequency and distribution mean of hippocampal theta activity during REM sleep were significantly higher in NP rats than in P, HAD, and LAD rats. In addition, theta frequency during alert immobility tended to be higher in NP rats than in P, HAD, and LAD rats. A qualitative comparison of these data with published data from unselected rats further suggested that the NP rats are uniquely different with respect to theta frequency.

Alcohol Drinking↗
PubMedDate not supplied

The predictive utility of drinking refusal self-efficacy and alcohol expectancy: a diary-based study of tension reduction.

The potential tension reduction effects of alcohol may be most appropriately tested by examining the role of alcohol related beliefs regarding alcohol's anxiolytic properties. The relationship between affective change drinking refusal self-efficacy, tension reduction alcohol expectancies, and ongoing drinking behavior was examined amongst 57 regular drinkers. Alcohol consumption, antecedent, and consequent mood states were monitored prospectively by diary, Social learning theory hypothesizes that low drinking refusal self-efficacy when experiencing a negative mood state should be associated with more frequent drinking when tense. Strong alcohol expectancies of tension reduction were hypothesized to predict subsequent tension reduction. Contrary to this hypothesis, the present study found that alcohol expectancies were more strongly related to antecedent mood states. Only a weak relationship between drinking refusal self-efficacy and predrinking tension, and between alcohol expectancy and subsequent tension reduction, was evident.

Adult↗
PubMed2006

Predicting risky and angry driving as a function of gender.

The present study was designed to examine putative risk factors of driving anger, traffic citations, and traffic-related injuries as a function of gender. Participants included 785 (65% men) drivers identified by the Washington State Department of Licensing. Just over half of participants (55%) were identified as high-risk drivers based on multiple traffic violations, whereas 45% were recruited from a random sample of drivers. Participants completed a mailed survey assessing indicators of risky driving and risk factors including sensation seeking, stressful events, negative affect, tobacco use, and drinking behavior. Hierarchical regression analysis was used to evaluate risky driving outcomes as a function of theoretically prioritized risk factors and to evaluate gender as a moderator. Overall, men reported more traffic citations and injuries, but did not differ from women in reported driving anger. All putative risk factors were associated with one or more indicators of risky driving. Moderation results revealed that the positive relationship between drinking frequency and driving anger was stronger for women. In contrast, typical number of drinks consumed was negatively associated with driving anger, which was also more evident for women. In addition, the positive association between sensation seeking and number of traffic citations was stronger among women.

Accidents, Traffic↗