有关吸烟及围术期用药相互作用的护理思考

为保证病人在围术期用药的安全性,本文对吸烟和术前不同用药与麻醉药之间的不良反应和预防措施进行进行了回顾。     

Relationships between cognitive function and frailty in older Korean adults: The moderating effect of the number of teeth

BackgroundCognitive function and physical frailty are known to be closely related. Among older adults with dementia, those who wear dentures have a higher mortality rate than those who do not wear them. This suggests the possibility that oral health may affect the cognitive-frailty relationship. This study aims to investigate whether the number of teeth present, acts as a moderating variable in the cognitive function-frailty relationship.MethodsData were obtained from the cross-sectional baseline study of the Korean Frailty Aging Cohort Study (2016–2017). Cognitive function was assessed using the Mini-Mental State Examination. Frailty score was based on the Cardiovascular Health Study Index. Oral condition was evaluated by the number of teeth present and analyzed using categories of 0-9 teeth, 10-19 teeth, and ≥20. The moderation effect was analyzed using the ordinary least squares (OLS) regression.ResultsData on 2,310 older adults (1,110 men; mean age 75.9 ± 3.9 years) was analyzed. Adjusting for age, sex, income, education, alcohol drinking, body mass index, and number of comorbidities, cognitive function and frailty showed a negative association (B=-.030, p = .011). In the 10-19 teeth category, compared to the 0-9 teeth category, a negative association with frailty was found (B=-.152, p = .026). A significant interaction effect between the number of teeth and cognitive function was detected (p = .007).ConclusionThe number of teeth may modify the degree of the association between cognitive function and frailty. For effective frailty management of older persons, cognitive function management and oral management should be considered and performed together.     

Metabolic studies on the possible mode of action of isoniazid tumorigenicity

Summary Data on tumorigenicity and mutagenicity of INH show that INH is tumorigenic in mice but not in rats. The metabolic studies on the two species denote that rats are rapid inactivators whereas mice are slow inactivators of INH. Rats are also resistant to the immediate inhibitory effect of INH on DNA biosynthesis. Using Ames test it was observed that INH is mutagenic to salmonella typhimurium strains TA 100 and 1535 and this effect is abolished in presence of 59 mixture. In vivo and in vitro studies on INH interaction with macromolecules reveal that there is a greater interaction with RNA than with DNA and the site of interaction is the cytidine and deoxycytidine, respectively. A preliminary study is undertaken to see if healed TB cases have a higher risk for cancer. It is found that cancer incidence in this group is higher as compared to noncancer patients.     

Effect of Pentylenetetrazole on Ethanol Intake, Ethanol Kinetics, and Social Behavior in Male Wistar Rats

Stress and anxiety are often implicated in excessive alcohol use. The nature of this interaction, however, is not understood. The aim of this study was to examine the effect of the anxiogenic agent, pentylenetetrazole (PTZ), on the acquisition and maintenance of ethanol drinking behavior in male Wistar rats. In rats maintained on a limited access procedure, with a choice between a 12% w/v ethanol (ETOH) solution and water available for 30 min each day, acute PTZ administration (1.5 to 15.0 mg/kg) did not modify ETOH intake. Chronic PTZ administration elicited a significant suppression in ETOH intake; however, this effect developed gradually over time. During the acquisition phase, chronic PTZ treatment also suppressed ETOH consumption. Chronic, but not acute, treatment with PTZ seemed to enhance water consumption. To assess whether the effect of PTZ on ETOH intake was due to either alterations in ETOH kinetics or behavior, blood ETOH levels and social interaction behaviour were examined. PTZ (15.0 mg/kg) produced a significant suppression in social interaction behavior, although tolerance developed to this effect on chronic PTZ administration. Both acute and chronic PTZ treatment (15 mg/kg) resulted in lower blood ETOH levels achieved after administration of 1.0 g/kg po of ETOH. Because the anxiogenic effect of PTZ was not maintained on repeated administration, yet the suppression of ETOH intake was only observed after chronic treatment, this suggests a dissociation between the processes regulating these behaviors.     

Drug challenges reveal differences in mediation of stress facilitation of voluntary alcohol drinking and withdrawal-induced anxiety in alcohol-preferring P rats

BACKGROUND: There is controversy over whether exposure to stress precipitates relapse and/or increases alcohol (ethanol) intake. Our laboratory has demonstrated that repeated stress prior to withdrawal from a brief forced exposure to alcohol results in withdrawal-induced anxiety-like behavior. Because anxiety is often regarded as a precipitating factor in relapsing alcoholics, we decided to examine the consequences of stressing alcohol-preferring P rats on both voluntary alcohol drinking and withdrawal-induced anxiety. METHODS: P rats were subjected to 3 cycles of 5 days of voluntary alcohol drinking and 2 days of deprivation. Restraint stress (60 min) was applied to some animals during the first and second deprivations/withdrawals (at 4 h). Drugs (flumazenil, buspirone, SB242,084, CP154,526, CRA1000, naloxone, haloperidol, olanzapine, naloxone, and haloperidol) were given to some rats 30 min prior to restraint stress. RESULTS: Stressed, deprived P rats exhibited both a longer duration of elevated alcohol drinking and anxiety-like behavior in the social interaction test upon withdrawal after the third cycle of voluntary alcohol drinking. When given prior to each of the restraint stresses, the benzodiazepine receptor antagonist flumazenil (5 mg/kg), the corticotrophin releasing factor receptor antagonists CRA1000 (3 mg/kg) and CP154,526 (10 mg/kg), the serotonin 5-HT(1A) receptor partial agonist buspirone (0.6 mg/kg), and the mixed 5-HT(2C)/D2 receptor antagonist olanzapine were effective in reducing the increased duration of elevated alcohol drinking and the withdrawal-induced anxiety-like behavior. In contrast, while the opiate receptor antagonist naloxone (20 mg/kg), the 5-HT(2C) receptor antagonist SB242084 (3 mg/kg), and the dopamine receptor antagonist haloperidol (0.1 mg/kg) also reduced drinking, they did not significantly alter anxiety like behavior. CONCLUSION: These results suggest that stress-induced facilitation of alcohol drinking and withdrawal-induced anxiety-like behavior in P rats may be closely but imperfectly linked.     

钙离子信号调节亲环素配体研究进展

钙离子信号调节亲环素配体(CAML)作为亲环素B的结合蛋白于1994年被首次发现,尽管其具体作用机制目前还不十分清楚,但许多研究已证实其在T细胞受体及钙离子信号转导、细胞凋亡、免疫调节以及病毒感染等方面具有重要作用.目前已经报道与其相互作用的蛋白主要有:跨膜激活剂及钙调亲环素配体相互作用分子(transmembrane activator and CAML interactor,TACI)、EGF受体,血管紧张素ⅡⅠ型受体相关蛋白(AT1 receptorassociated protein,ATRAP)、人立早基因(immediate early gene X-1,IEX-1)、淋巴细胞特异蛋白质酪氨酸激酶(p56Lck)、常染色体隐性遗传性多囊肾疾病的相关基因PKHD1编码的蛋白fibrocystin,以及霍普金氏肉瘤相关疱疹病毒K7蛋白(KSHV)等.本文就CAML相关研究进展作简要综述.     

砷与5-氮胞苷对人淋巴细胞DNA损伤的联合作用

为探讨砷和5－氮胞苷对人淋巴细胞DNA损伤及修复的联合作用，应用单细胞凝胶电泳（SCGE）技术比较研究了5－氮胞苷与砷同时和前后作用于人类淋巴细胞产生的联合毒性，结果显示10μmol/L5-氮胞苷和10μmol/L砷单独处理人淋巴细胞2h引起明显的DNA泳动（彗星尾），但两试剂引起的DNA泳动（彗星尾）间无显差异，5－氮胞苷前处理与砷后处理2h引起的彗星尾与其单独处理组比较非常显，砷前处理与5－氮胞苷后处理引起的彗星尾与其单独处理组比较无显性差异，但较对照组差异显，10μmol/L5-氮胞苷和10μmol/L砷分别单独处理2h引起了人淋巴细胞显的DNA损伤（链断裂），5－氮胞苷与砷在对淋巴细胞DNA的损伤上表现为单纯相加作用。5－氮胞苷前处理显增加了细胞对砷的基因毒性的敏感性，或砷后处理显增加了5－氮胞苷引起的DNA损伤，5－氮胞苷后处理2h显抑制了细胞对砷所致DNA损伤的修复。     

Identité et spécificité du « pédantisme » dans le syndrome d’Asperger

The purpose of this work is to better understand pedantic speech in Asperger syndrome as a pervasive developmental disorder. Often mentioned, unlike echolalia in studies on typical autism, this symptom questions the possible specificity of Asperger syndrome. From a review of literature and clinical examples, we propose an interpretation of this speech style as unified and coherent as possible. This clinical feature includes an overly precise vocabulary or overly favourite topic (which can be explained by a more general sameness) in the context of a one-side interaction (which can be explained by a more general impairment of influence). We suggest that the tendency to speak in a pedantic manner may be specific despite a generic disorder shared with typical autism.