Kazuhito Yokoyama

Assessment of Urinary Cotinine as a Marker of Nicotine Absorption from Tobacco Leaves: A Study on Tobacco Farmers in Malaysia

Assessment of Urinary Cotinine as a Marker of Nicotine Absorption from Tobacco Leaves: A Study on Tobacco Farmers in Malaysia: Mayumi Onuki, et al. Department of Public Health, Graduate School of Medicine, The University of Tokyo—To assess dermal absorption of nicotine from tobacco leaves in relation to Green Tobacco Sickness (GTS), urinary cotinine concentrations were measured in 80 male tobacco‐growing farmers and in 40 healthy males (controls) who did not handle wet tobacco leaves in Kelantan, Malaysia. Among non‐smokers, urinary cotinine levels in farmers were significantly higher than those of controls; farmers with urinary cotinine of 50 ng/ml/m2 or above showed eye symptoms more frequently than those below this level (p<0.05). Farmers who did not wear protective equipment had subjective symptoms more frequently than those who used the equipment (p<0.05); some of these symptoms were seen more frequently in organophosphate (Tamaron) users than in non‐users. As tobacco farmers evidence a risk of nicotine poisoning from tobacco leaves, assessment including GTS together with effects of pesticides will be necessary.

Subacute toxic effects of zinc on various tissues and organs of rats

In order to expand our knowledge of zinc toxicity and to assess further the toxicities of zinc systematically, we observed the toxic effects of zinc on the functions of various tissues and organs in rats. The rats were randomly divided into four groups (14 in each group), viz. one normal control group (received saline), two zinc groups (Znlow: 4 mg/kg of zinc acetate; Znhigh: 8 mg/kg of zinc acetate), and one cyclophosphamide group (50 mg/kg, as positive control of micronucleated polychromatic erythrocytes (MPCEs)). Saline and zinc acetate were administered intraperitoneally to the rats once every 2 days, seven times in total. Cyclophosphamide was given intraperitoneally to the rats once. The concentration of blood zinc was determined and accumulation of zinc was not observed in the experimental groups. The frequencies of basophilic stippled erythrocyte (BSE) and MPCEs in the Znhigh group were significantly higher than those in the control group (P<0.05). The levels of serum glutamic oxalacetic transaminase (GOT) and serum triiodothyronine (T3) in the Znhigh groups decreased significantly, compared with the control group (P<0.01 or 0.05). Moreover, we also observed that the level of serum cortisol, another adrenal corticoid hormone in rats, was increased by zinc acetate in a dose-dependent manner. According to the literature and our findings, exposure to zinc, especially at higher doses, may produce toxic effects on various tissues and organs including the hematopoietic system, cytogenetics, biochemistry and endocrine system function. Therefore, it is suggested that zinc should be used carefully, especially by high risk groups such as children and pregnant women despite its use as a food additive or in self-medication. At the same time, it is necessary to investigate and research further these toxicities of zinc with long-term administration of low dosage.

Policy functions of smoking control in Japan

Analysis of policy functions, with a focus on their major participants, elicits a clear picture of the decision-making process for smoking control in Japan. Activities of various advocacy groups have affected the functions of policy, including: Intelligence, Promotion, Prescription, Invocation, Application and Appraisal. In fulfilling these functions, they have affected every issue they faced by creating, transforming and propagating information in line with their interests and by influencing government decisions using coalition-building and the lobbying of elected officials. Furthermore, they have determined the development and implementation of various programs, even assuming key roles in substantiating the decisions. On the other hand, political leverage by the tobacco industry, exercised through various policy functions, intimidated the government leadership and eventually controlled its actions. When the nonsmokers’ rights groups emerged, they gradually started to take part in policy functions, sometimes in cooperation with the health agency. The initial and final forms of smoking control policies in society have been deeply affected by the involvement of these groups.

Validity and reliability of a revised Japanese version of the Arthritis Impact Measurement Scales version 2 (AIMS2).

Abstract This study aims to evaluate the validity and reliability of a Japanese version of the Arthritis Impact Measurement Scales, version 2 (AIMS2) for patients with rheumatoid arthritis (RA). The Japanese version of the AIMS2 questionnaire was administered to 1643 patients with classical or definite RA at 11 hospitals nationwide in Japan. Reliability was assessed by a test–retest procedure, 4 weeks apart, using 75 randomly selected patients. Internal consistency was measured by Cronbachs α, and factor analysis was used to obtain the proportion of variance explained by the first factor in principal component analysis. The validity of the AIMS2 scales was assessed by internal standards. Internal consistency (α coefficients, 0.84–0.94), test–retest reliability (intraclass correlation coefficients, 0.75–0.93), and factor analysis (0.62–0.85) of the AIMS2 health status scales proved that they are highly reliable in the Japanese version. Validity, as measured by the relationships among the scores on the questionnaire items, was also sufficiently secured. The validity and reliability of the Japanese version of the AIMS2 are sufficient for all practical purposes when compared with the original and with other translated versions of the questionnaire.