• 한국연초학회지
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• 제20권1호
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• pp.99-107
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• 1998

Numerous studies have demonstrated a negative association between cigarette smoking and Parkinson's disease. The present study was undertaken to investigate whether chronic exposure of mice to cigarette smoke a(footed the metabolism of 1-methyl-1113,6-tetrahydro-pyridine (MPTP) by cytochrome P4SO (P-450) or flavin-containing monooxygenase (FMO) in the hepatic microsomes of C57BL6/J mice. Adult male C57BL6/J mice were exposed to mainstream smoke generated from 15 cigarettes for 10 min a day and 5 day per week for 6 weeks. MPTP (10 mg/kg body weight) was administered to mice by subcutaneous injection for 6 consecutive days. Microsolnal P-450 content was increased by MPTP, smoke exposure, or both, but NADPH cytochrome P-450 reductase activity was rather decreased by the same treatments. The activities of benzo(a)pyrene hydroxylase, 7-ethoxycoumarin O-deethylase and ethoxyresorufin O-deethylase were significantly increased by the exposure of cigarette smoke, but were not or little affected by MPTP treatment. Benzphetamine N-demethylase activity was not affected either by MPTP treatment or by cigarette smoke exposure, but it was significantly increased by the combined MPTP treatment with cigarette smoke exposure, showing their synergic effect for the induction of the enzyme activity. Interestingly, in vitro studies of hepatic FMO and P-450 system both O-oxygenation and N-demethylation of MPTP were increased in the smoke-exposed or in the MPTP-treated mice. These results suggest that the enhancement in the N-demethylation as well as O-deethylation of P-450 system and in the N-oxygenation of FMO activity by cigarette smoke exposure in mouse liver may contribute to attenuating the neurotoxic effects of MPTP on the nigrostriatal dopaminergic neurons.

• Asian Pacific Journal of Cancer Prevention
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• 제17권6호
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• pp.2841-2846
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• 2016

Background: Tobacco use is the single most important preventable risk factor for cancer. Surveillance of tobacco-related cancers (TRC) is critical for monitoring trends and evaluating tobacco control programmes. We analysed the trends of TRC and evaluated the population-based cancer registry (PBCR) in Delhi for simplicity, comparability, validity, timeliness and representativeness. Materials and Methods: We interviewed key informants, observed registry processes and analysed the PBCR dataset for the period 1988-2009 using the 2009 TRC definition of the International Agency for Research on Cancer. We calculated the percentages of morphologically verified cancers, death certificate-only (DCO) cases, missing values of key variables and the time between cancer diagnosis and registration or publication for the year 2009. Results: The number of new cancer cases increased from 5,854 to 15,244 (160%) during 1988-2009. TRC constituted 58% of all cancers among men and 47% among women in 2009. The age-adjusted incidence rates of TRC per 100,000 population increased from 64.2 to 97.3 among men, and from 66.2 to 69.2 among women during 1988-2009. Data on all cancer cases presenting at all major government and private health facilities are actively collected by the PBCR staff using standard paper-based forms. Data abstraction and coding is conducted manually following ICD-10 classifications. Eighty per cent of cases were morphologically verified and 1% were identified by death certificate only. Less than 1% of key variables had missing values. The median time to registration and publishing was 13 and 32 months, respectively. Conclusions: The burden of TRC in Delhi is high and increasing. The Delhi PBCR is well organized and generates high-quality, representative data. However, data could be published earlier if paper-based data are replaced by electronic data abstraction.

• Asian Pacific Journal of Cancer Prevention
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• 제15권20호
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• pp.8887-8891
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• 2014

Oral squamous cell carcinoma (OSCC) is predominantly a disease of middle-aged men with long-term exposure to tobacco and alcohol. An increasing trend has been reported at a younger age worldwide. Clinical records of 100 patients under the age of 45 years treated specifically for oral cavity SCC in our hospital during a 10-year period were retrospectively analyzed to calculate the survival rates. An obvious male predominance coincided with smoking trend among Chinese young individuals and female patients were more likely to have no traditional risk factors such as smoking or drinking. The 5-year overall survival rate and disease-free survival rate were 61.0% and 75.5%, respectively, consistent with other published series over the decade showing a relatively better survival among the young. No significant differences clearly correlated with outcome when comparing non-smokers non-drinkers to ever-smokers and ever drinkers (P>0.05). Overall survival rate and disease free survival rate was found to be significantly higher in patients with early-stage disease than with advanced stage disease (P=0.001, P=0.009 respectively). The strong influence of clinical stage on prognosis emphasizes the importance of early diagnosis and treatment of oral malignancies for this unique clinical subgroup.

• Journal of Preventive Medicine and Public Health
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• 제49권2호
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• pp.80-96
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• 2016

최근 담배제조회사의 불법행위법상 손해배상책임을 둘러싼 소송이 계속되고 있다. 이미 대법원 판결이 나온 사건도 있고, 현재 소송이 계속 중인 사건도 있는데, 원고가 증거로 제출한 역학 자료에 의하여 흡연과 질병 사이의 인과관계가 증명되었다고 볼 수 있는지가 이 사건들의 공통된 주요 쟁점이다. 담배소송에서 인과관계의 증명이 쟁점으로 부각되는 까닭은 흡연에 따른 질병의 발생이 흡연 외의 다양한 요인의 영향을 받을 뿐만 아니라 흡연과 발병 사이의 시간적 간격도 길어 원고가 인과관계의 증명에 곤란을 겪기 때문이다. 흡연자 담배소송의 대법원 판결(대판 2014. 4. 10, 2011다22092)은 역학적 증거에 의한 인과관계의 증명 여부에 관하여 비교적 신중한 입장을 취하고 있는데, 몇 가지 아쉬움이 남는다. 첫째, 대법원은 질병을 특이성 질환과 비특이성 질환으로 2분하여 양자 사이에 인과관계의 증명방법을 달리 보았다. 그러나 특이성 질환의 개념은 발병요인에 관하여 의학계와 보건학계에서 확립된 학설인 다요인설에 배치된다. 더구나 불법행위법의 영역에서 특이성 질환 개념을 새로 도입하여야 할 필요성도 발견하기 어렵다. 둘째, 대법원은 비특이성 질환의 경우에 역학적 상관관계가 인정된다고 하더라도 원고가 위험인자에 노출된 시기와 노출 정도, 발병시기, 그 위험인자에 노출되기 전의 건강상태, 생활습관 등을 증명하여 그 위험인자에 의하여 비특이성 질환이 유발되었을 개연성을 증명하여야 한다고 하였다. 하지만 질병과 위험인자와의 역학적 관련성이 상당한 강도에 이른 경우에도 여전히 원고에게 추가적 증명책임을 부과하는 것은 권리구제의 범위를 지나치게 좁힐 우려가 있다. 셋째, 대법원이 이처럼 역학적 증거의 가치를 인정하는 데에 소극적인 까닭은 역학적 연구가 개인이 아닌 특정인구집단을 대상으로 한 것이기 때문으로 보인다. 그러나 역학적 증거가 집단의 구성원인 개인(들)에 대하여 가치 있는 정보를 제공하지 못한다고 단정하기에는 이르다. 예컨대, 역학에서 산출하는 인과확률은 집단 내에서 무작위로 뽑아낸 환자의 질병 발생이 위험인자에 의해 발생하였을 확률을 나타내는데, 이는 집단 차원의 확률을 구성원인 개인의 확률로 전환하는 유용한 지표이므로 역학적 증거만으로도 인과관계의 개연성을 증명할 여지가 있다고 생각된다.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 1999년도 임시총회 및 추계 학술발표회
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• pp.67.1-67
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• 1999

• Asian Pacific Journal of Cancer Prevention
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• 제15권16호
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• pp.6553-6558
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• 2014

Background: This study was conducted to gauge how the demographic profile of smokeless tobacco (SLT) users from Gujarat and Andhra Pradesh, India, differs from that of smokers. It also addresses how factors associated with the initiation and continuation of smokeless tobacco vary by age, gender, and education. Materials and Methods: We analyzed 2011 cross-sectional survey data collected from 4,759 respondents (smokers/SLT users/non-users) in both states. Chi-square analysis was used to make comparisons between the demographic profiles of smokers and SLT users. Multivariable logistic regression analysis was used to obtain the odds ratios (ORs) for initiation and continuation factors regressed on socio-demographic variables (age, gender, education). Results: Initiation-women were less likely than men to report "peer pressure", "fashion statement", and "stress/coping" as relevant factors for SLT use (OR: 0.45 CI: 0.30-0.70; OR: 0.42 CI: 0.24-0.74; OR: 2.47, CI: 1.47-4.15). Older age groups had lower odds of choosing "peer pressure" than the 15-24 year olds. Respondents with 11 or more years of education were more likely to report "stress/coping" than those with no education (OR: 2.82, CI: 1.06-7.48). Continuation-women were less likely than men to choose "relaxation", and "distance from family" as important continuation factors (OR: 0.50, CI:0.32-0.80; OR: 0.20, CI: 0.06-0.65). All age groups were less likely to choose "stimulation" as a factor than the youngest group. Conclusions: Along with confirming and expanding upon previous literature, the findings of this study should encourage further SLT research in women and younger age groups (15-24 and 24-44). They also confirm the need for SLT prevention and cessation interventions in India in other community-based settings, besides schools.

• 한국연초학회지
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• 제14권1호
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• pp.24-32
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• 1992

The present study was conducted to compare the relative efficiency of two different haploid breeding methods in tobacco varietal development. A single F t hybrid plant from cross of two flue-cured cultivars of Nicotiana tabacum L., Bright Yellow4(BY4) and NC 95, was used to develop the 30 dihaploid lines by anther culture(F1-ADH) and maternally-derived doubled haploid utilizing Nicotiana africana(F1-MDH), respectively. As compared with mid-parent, ADH lines showed increasing in number of leaves, delaying in days to flower and narrowing in leaf width. However, no significant differences in the other characters investigated were recognized. MDH lines also showed narrow leaf width, while no significant differences in the other characters were observed. The variations of the characters investigated were generally greater in ADH than MDH lines. MDH lines had higher plant height and shorter days to flower than ADH lines, while other characters did not show remarkable differences. The degree of heritability for each of the characters observed between ADH and MDH was almost the same. The characters showing high heritability value were plant height, leaf number, days to flower, and yield, while those showing relatively low value were leaf length, leaf width, and total alkaloid content. Predicted gains from selection for increased yield were calculated for both populations(F1-ADH, F1-MDH) and correlated responses associated with selection for yield were estimated. Plant height, leaf width, days to flower, percent reducing sugar and disease resistance would be expected to improve with selection for yield much faster in the MDH population than in the ADH.

• 한국학교보건학회지
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• 제19권2호
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• pp.75-88
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• 2006

Purpose : This study are the secondary data of Global Youth Tobacco Survey(GYTS) developed by the WHO and United State Center for Disease Control(CDC) and Prevention to trace tobacco use among youth in youth in countries across the world. This study was carried out to serve for a basis for antismoking campaigns and to prevent adolescents from smoking by analyzing the smoking by analyzing the smoking realities factors. Methods : This study is a cross-sectional school-based survey, which employed a two-stage cluster sample design to produce a nationally representative sample of middle school students aged 13 to 15 years olds. Seventy-five schools were selected. All schools containing grade 1, 2 and 3 that contained 40 or students were included in the sampling frame. Results : The results of this study were as follows ; 1. The proportion of smoking students in middle school was 6.4% and the rate of smoking in male students(7.4%) was higher than it of in female students(5.5%). 2. 26.5% of all respondent had a experience to try smoke and the results showed that the rate of trying smoking in male students was increased by grade more than female students. 3. According to test of significance in regression analysis, the independent variables such as sex, school grade, smoking parents, friends distinction, pocket money and others showed statistical significance. 4. There was a statistical significance between smokers and nonsmokers in proportion to the completing the preventive education for nonsmoking(p=0.0023) and the acquirement of knowledge on smoking(p<.0001). 5. Finally there was a statistical significance between the exposure to anti-smoking campaign(p=0.0053) and tobacco advertisement in the mass media and the smoking(p=0.0036). Conclusion : All things considered, the health education for tobacco control in school need to be developed from an elementary school. I suggest that prevent smoking program in school need to be revitalized and be made more accessible for everyone who wish to quit. And the government should develop the regulation on total banning promoting cigarette advertising and smoking scene in the movie for young people.

• 한국응용곤충학회지
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• 제22권3호
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• pp.181-185
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• 1983

강원도 철원군 동송읍 일대의 인삼근부병을 조사한 결과 감자썩이선충(Ditylenchus destructor)을 분리 동정하였으며 이 선충이 인삼근부병의 한 원인임이 확인되었다. 이지역 인삼재식지 조사면적의 약 $36\%$인 $28,050m^2$가 이 선충으로 인하여 피해를 입었다. 이 선충에 걸린 인삼은 주로 주근(Tap root)의 피층이 갈변하고 Sponge 화되며 피층내부에 Cork 조직이 발달하여 부리가 잘부러진다. 이런 뿌리는 표피가 잘 벗겨지고 심한경우에는 뿌리에 내공이 생기거나 뿌리전체가 썩어 없어지며 줄기와 잎은 급격히 푸른채로 시들어 죽는다. 잎이시드는 병징이 있는 포장에서는 감자썩이선충이 $8.5\~222$마리/30g 이었고 병징이 나타나지 않은 포장에서는 $0\~7.0$ 마리였다.

• 한국식품영양과학회지
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• 제28권3호
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• pp.607-612
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• 1999

Cigarette smoking is the potential risk factor for lung cancer and chronic pulmonary disease, as well as inflammatory bowel disease and reproductive malfunction. Nicotine and tar have been im plicated as a major factor in the pathogenesis of the diseases. Nicotine increases heart rate and blood pressure due to stimulation sympathetic neurotransmission and tar also accounts for the severe damage of peridontal diseases and osteoporosis in postmenopausal women. Portulaca oleracea, which contains significant amount of K+, noradrenaline and dopamine as well as various nutrients, has been used for many medicinal purposes and one of which is the detoxification of insect or snake toxins. The purpose of this study was to investigate the action of Portulaca oleracea extracts on the reduction of harmful materials of tabacco. The reduction percentages were measured in the presence and absence of each solvent extract of Portulaca oleracea using reversed C18 column of HPLC. Nicotine reduction effects were obtained from aqueous, methanol and chloroform extracts of Portulaca oleracea as 89%, 55% and 51%, respectively. The results suggest that the polar extracts of Portulaca oleracea affects the reduction of nicotine which is responsible for many diseases.