Miyagi Cancer Research Institute

Natori, Japan

Miyagi Cancer Research Institute

Natori, Japan
SEARCH FILTERS
Time filter
Source Type

Takachi R.,Nara Women's University | Inoue M.,University of Tokyo | Inoue M.,National Cancer Center | Sugawara Y.,Tohoku University | And 24 more authors.
Journal of Epidemiology | Year: 2017

Background: A series of recent reports from large-scale cohort studies involving more than 100,000 subjects reported no or only very small inverse associations between fruit and vegetable intake and overall cancer incidence, despite having sufficient power to do so. To date, however, no such data have been reported for Asian populations. Objective: To provide some indication of the net impact of fruit and vegetable consumption on overall cancer prevention, we examined these associations in a pooled analysis of large-scale cohort studies in Japanese populations. Methods: We analyzed original data from four cohort studies that measured fruit and vegetable consumption using validated questionnaires at baseline. Hazard ratios (HRs) in the individual studies were calculated, with adjustment for a common set of variables, and combined using a random-effects model. Results: During 2,318,927 person-years of follow-up for a total of 191,519 subjects, 17,681 cases of overall cancers were identified. Consumption of fruit or vegetables was not associated with decreased risk of overall cancers: corresponding HRs for the highest versus lowest quartiles of intake for men and women were 1.03 (95% CI, 0.97e1.10; trend p = 1.00) and 1.03 (95% CI, 0.95e1.11; trend p = 0.97), respectively, for fruit and 1.07 (95% CI, 1.01e1.14; trend p = 0.18) and 0.98 (95% CI, 0.91e1.06; trend p = 0.99), respectively, for vegetables, even in analyses stratified by smoking status and alcohol drinking. Conclusions: The results of this pooled analysis do not support inverse associations of fruit and vegetable consumption with overall cancers in the Japanese population. © 2016 The Authors.


Oze I.,Aichi Cancer Center Research Institute | Matsuo K.,Aichi Cancer Center Research Institute | Ito H.,Aichi Cancer Center Research Institute | Wakai K.,Nagoya University | And 19 more authors.
Japanese Journal of Clinical Oncology | Year: 2012

Objective: Although cigarette smoking is considered as an important risk factor for esophageal cancer, the magnitude of the association might be varied among geographic areas. Therefore, we reviewed epidemiologic studies on the association between cigarette smoking and esophageal cancer among the Japanese population. Methods: Original articles were obtained from MEDLINE searched using PubMed or from searches of the Ichushi database, complemented by manual searches. Evaluation of associations was based on the strength of evidence ('convincing', 'probable', 'possible' or 'insufficient') and the magnitude of association ('strong', 'moderate', 'weak' or 'no association'), together with biological plausibility as previously evaluated by the International Agency for Research on Cancer. Results: We identified four cohort studies and 11 case-control studies. All cohort studies and eight case-control studies showed strong positive associations between esophageal cancer and cigarette smoking. All cohort studies and five case-control studies showed that cigarette smoking had dose-response relationships with esophageal cancer. Meta-analysis of 12 studies indicated that the summary estimate for ever smokers relative to never smokers was 3.01 (95% confidence interval: 2.30-3.94). Summary relative risk for current and former smokers relative to never smokers was 3.73 (2.16-6.43) and 2.21 (1.60-3.06), respectively. Conclusions: We conclude that there is convincing evidence that cigarette smoking strongly increases the risk of esophageal cancer in the Japanese population. © The Author 2011. Published by Oxford University Press. All rights reserved.


Shimazu T.,Research Center for Cancer Prevention and Screening | Wakai K.,Nagoya University | Tamakoshi A.,Hokkaido University | Tsuji I.,Tohoku University | And 20 more authors.
Annals of Oncology | Year: 2014

Background: Prospective evidence is inconsistent regarding the association between vegetable/fruit intake and the risk of gastric cancer. Methods: In an analysis of original data from four population-based prospective cohort studies encompassing 191 232 participants, we used Cox proportional hazards regression to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) of gastric cancer incidence according to vegetable and fruit intake and conducted a meta-analysis of HRs derived from each study. Results: During 2 094 428 person-years of follow-up, 2995 gastric cancer cases were identified. After adjustment for potential confounders, we found a marginally significant decrease in gastric cancer risk in relation to total vegetable intake but not total fruit intake: the multivariate-adjusted HR (95% CI; P for trend) for the highest versus the lowest quintile of total vegetable intake was 0.89 (0.77-1.03; P for trend = 0.13) among men and 0.83 (0.67-1.03; P for trend = 0.40) among women. For distal gastric cancer, the multivariate HR for the highest quintile of total vegetable intake was 0.78 (0.63-0.97; P for trend = 0.02) among men. Conclusion(s): This pooled analysis of data from large prospective studies in Japan suggests that vegetable intake reduces gastric cancer risk, especially the risk of distal gastric cancer among men. © The Author 2014. Published by Oxford University Press on behalf of the European Society for Medical Oncology. All rights reserved.


Nagata C.,Gifu University | Mizoue T.,National Center for Global Health and Medicine | Tanaka K.,Saga University | Tsuji I.,Tohoku University | And 19 more authors.
Japanese Journal of Clinical Oncology | Year: 2014

Objective: We reviewed epidemiological studies of soy intake and breast cancer among Japanese women. This report is one among a series of articles by our research group, which is evaluating the existing evidence concerning the association between health-related lifestyles and cancer. Methods: Original data were obtained from MEDLINE searches using PubMed or from searches of the Ichushi database, complemented with manual searches. Evaluation of associations was based on the strength of evidence and the magnitude of association, together with biological plausibility. Results: Five cohort studies and six case-control studies were identified. Among the cohort studies, two studies observed that total soy intake (in terms of total amounts of soy foods or soy isoflavones) was associated with a moderate (0.5 ≤ relative risk ≤ 0.67 with statistical significance) or strong (relative risk ≤ 0.5 with statistical significance) risk reduction of breast cancer in postmenopausal women. Among the case-control studies, two studies reported a weak (0.67 ≤ odds ratio ≤ 1.5 with statistical significance or 0.5 ≤ odds ratio ≤ 0.67 without statistical significance) inverse association between total soy intake and the risk of breast cancer. In the former, this association was observed in all women combined-premenopausal and postmenopausal women-but in the latter, the association was confined to postmenopausal women. The associations of intakes of individual soy foods with the risk of breast cancer were generally null. There is some evidence that supports the biological plausibility of a protective effect of isoflavones on breast cancer risk. Conclusions:We conclude that soy intake possibly decreases the risk of breast cancer among Japanese women. © The Author 2014.


Ito S.,Miyagi Cancer Center | Tase T.,Miyagi Cancer Center | Satoh K.,Miyagi Cancer Research Institute | Ueki M.,Miyagi Cancer Center | And 2 more authors.
Pathology International | Year: 2014

In this report, unique endocervical glandular lesions exhibiting gastric differentiation were examined in a patient with Peutz-Jeghers syndrome. The result of the human papillomavirus (HPV) in situ hybridization (ISH) for the hysterectomy specimens was negative, but they demonstrated a papillary mucinous adenocarcinoma at the proximal endocervix continuous to atypical lobular endocervical glandular hyperplasia. Both contained MUC6-positive neutral mucin in cytoplasm, and showed different immunoreactivity to p16, Ki-67, and p53. Moreover, they harbored the identical K-RAS gene mutation suggesting that there was a common origin. Somatic K-RAS mutation and defective function of p16 may have been involved in the tumorigenesis of these unusual mucinous neoplasms. © 2014 Japanese Society of Pathology and Wiley Publishing Asia Pty Ltd.


Nagata T.,Iwaki Meisei University | Nagata T.,Tohoku University | Murata K.,Iwaki Meisei University | Murata R.,Iwaki Meisei University | And 9 more authors.
Biochemical and Biophysical Research Communications | Year: 2014

Hepatocyte growth factor (HGF)-regulated tyrosine kinase substrate (Hrs) is a vesicular sorting protein that functions as one of the endosomal-sorting proteins required for transport (ESCRT). Hrs, which binds to ubiquitinated proteins through its ubiquitin-interacting motif (UIM), contributes to the lysosomal transport and degradation of ubiquitinated membrane proteins. However, little is known about the relationship between B-cell functions and ESCRT proteins in vivo. Here we examined the immunological roles of Hrs in B-cell development and functions using B-cell-specific Hrs-deficient (Hrs flox/flox;mb1cre/+:Hrs-cKO) mice, which were generated using a cre-LoxP recombination system. Hrs deficiency in B-cells significantly reduced T-cell-dependent antibody production in vivo and impaired the proliferation of B-cells treated in vitro with an anti-IgM monoclonal antibody but not with LPS. Although early development of B-cells in the bone marrow was normal in Hrs-cKO mice, there was a significant decrease in the number of the peripheral transitional B-cells and marginal zone B-cells in the spleen of Hrs-cKO mice. These results indicate that Hrs plays important roles during peripheral development and physiological functions of B lymphocytes. © 2013 Elsevier Inc. All rights reserved.


Pham N.M.,International Clinical Research Center | Mizoue T.,International Clinical Research Center | Tanaka K.,Saga University | Tsuji I.,Tohoku University | And 19 more authors.
Japanese Journal of Clinical Oncology | Year: 2012

Objective: Higher levels of physical activity have been consistently associated with a decreased risk of colon cancer, but not rectal cancer, in Western populations. The present study systematically evaluated epidemiologic evidence on the association between physical activity and colorectal cancer risk among the Japanese population. Methods: Original data were obtained from MEDLINE searched using PubMed or from searches of the Ichushi database, complemented by manual searches. The associations were evaluated based on the strength of evidence, the magnitude of association and biologic plausibility. Results: Two cohort studies and six case-control studies were identified. A weak to strong protective association between physical activity and colon cancer risk was observed in both cohort studies, showing a graded relationship, and among the majority of case-control studies, with some showing a dose-response relationship. The association observed in cohort studies was more consistent and stronger in men than in women and for proximal colon cancer than for distal colon cancer. A protective association with rectal cancer was found only in case-control studies, but the evidence was less consistent and weaker than that observed for colon cancer. Conclusions: Physical activity probably decreases the risk of colorectal cancer among the Japanese population. More specifically, the evidence for the colon is probable, whereas that for the rectum is insufficient. © The Author 2011. Published by Oxford University Press. All rights reserved.


Akter S.,Center for Clinical science | Kashino I.,Center for Clinical science | Mizoue T.,Center for Clinical science | Mizoue T.,National Center for Global Health and Medicine | And 29 more authors.
Japanese Journal of Clinical Oncology | Year: 2016

Objective: It remains unclear whether coffee drinking is associated with colorectal cancer risk. We performed a systematic review and meta-analysis of epidemiologic studies on this issue among the Japanese population.Methods: Original data were obtained from MEDLINE searches using PubMed or from searches of the 'Ichushi' database, complemented with manual searches. Meta-analysis was performed by using the random effects model to estimate the summary relative risk with 95% confidence interval according to the study design. The final judgment was made based on a consensus of the research group members with consideration for both epidemiological evidence and biological plausibility.Results: We identified five cohort studies and nine case-control studies. Of these, one cohort study reported a strong inverse association (in women only), whereas three case-control studies reported a strong inverse association with colon or rectal cancer. In meta-analysis, high consumption of coffee was not appreciably associated with colorectal cancer risk among cohort studies, whereas it was associated with significantly lower risk of colorectal or colon cancer among case-control studies. The summary relative risk/odds ratio (95% confidence interval) for the highest versus lowest categories of coffee consumption was 0.95 (0.77-1.17) and 0.78 (0.65-0.95) for cohort and case-control studies, respectively.Conclusions: The evidence is insufficient to support that coffee drinking increases or decreases the risk of colorectal cancer among the Japanese population. © The Author 2016. Published by Oxford University Press. All rights reserved.


Tanaka K.,Saga University | Tsuji I.,Tohoku University | Tamakoshi A.,Aichi Medical University | Matsuo K.,Aichi Cancer Center Research Institute | And 13 more authors.
Japanese Journal of Clinical Oncology | Year: 2012

Objective: With increased interest in non-alcoholic steatohepatitis, its common co-morbid condition, obesity, has recently attracted much attention as a risk factor for liver cancer. Recent studies also suggest that obesity may play a role in the development of liver cancer in alcoholic cirrhosis or viral hepatitis and in the general population. Methods: We systematically reviewed epidemiologic studies on overweight/obesity and liver cancer among Japanese populations. Original data were obtained by searching the MEDLINE (PubMed) and Ichushi databases, complemented by manual searches. The evaluation was performed in terms of the magnitude of association in each study and the strength of evidence ('convincing', 'probable', 'possible' or 'insufficient'), together with biologic plausibility. Results: Among nine cohort studies identified, five (four on patients with chronic liver disease and one on local residents) reported a weak to strong positive association, while four (one on patients with hepatitis B and three on local residents) found no association [summary relative risk for one unit increase in body mass index (kg/m. 2) 1.07, 95% confidence interval 1.03-1.10]. All three case-control studies identified (two on cirrhotic patients and one on atomic bomb survivors) reported a strong positive association (summary relative risk 1.31, 95% confidence interval 1.12-1.53). Overall, the summary relative risk was estimated at 1.13 (95% confidence interval 1.07-1.20), and overweight/obese individuals had a relative risk of 1.74 (95% confidence interval 1.33-2.28) compared with those who had normal/low weight. Conclusions: We conclude that overweight or obesity 'probably' increases the risk of primary liver cancer, to a moderate degree, among the Japanese population. © The Author 2012. Published by Oxford University Press.


PubMed | Tohoku University, Iwaki Meisei University and Miyagi Cancer Research Institute
Type: Journal Article | Journal: Biochemical and biophysical research communications | Year: 2014

Hepatocyte growth factor (HGF)-regulated tyrosine kinase substrate (Hrs) is a vesicular sorting protein that functions as one of the endosomal-sorting proteins required for transport (ESCRT). Hrs, which binds to ubiquitinated proteins through its ubiquitin-interacting motif (UIM), contributes to the lysosomal transport and degradation of ubiquitinated membrane proteins. However, little is known about the relationship between B-cell functions and ESCRT proteins in vivo. Here we examined the immunological roles of Hrs in B-cell development and functions using B-cell-specific Hrs-deficient (Hrs(flox/flox);mb1(cre/)(+):Hrs-cKO) mice, which were generated using a cre-LoxP recombination system. Hrs deficiency in B-cells significantly reduced T-cell-dependent antibody production in vivo and impaired the proliferation of B-cells treated in vitro with an anti-IgM monoclonal antibody but not with LPS. Although early development of B-cells in the bone marrow was normal in Hrs-cKO mice, there was a significant decrease in the number of the peripheral transitional B-cells and marginal zone B-cells in the spleen of Hrs-cKO mice. These results indicate that Hrs plays important roles during peripheral development and physiological functions of B lymphocytes.

Loading Miyagi Cancer Research Institute collaborators
Loading Miyagi Cancer Research Institute collaborators