Nobuyuki Hamajima

Nagoya University, Nagoya, Aichi, Japan

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Publications (525)1423.55 Total impact

  • Muhammad Shuaib Shahram · Nobuyuki Hamajima · Joshua A Reyer
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    ABSTRACT: This study, a secondary analysis of data from Afghanistan Health Survey 2012, aimed to identify factors affecting maternal healthcare utilization in Afghanistan. Subjects were 5,662 women aged 15-49 years who had had one delivery in the two years preceding the survey. Odds ratio (OR) and 95% confidence interval (CI) were estimated by logistic regression analysis. The study found that 54.0% of mothers used antenatal care (ANC) at least one time, and 47.4% of births were assisted by skilled birth attendants (SBA). Adjusted OR of ANC use was 2.74 (95% CI, 2.08-3.60) for urban residency, 1.69 (95% CI, 1.26-2.27) for primary education relative to no education, 3.94 (95% CI, 3.51-4.42) for knowledge on danger signs of pregnancy, and 1.78 (95% CI, 1.47-2.15) for television and radio relative to no exposure. Adjusted OR of SBA utilization was 3.71 (95% CI, 2.65-5.18) for urban residency, 0.67 (95% CI, 0.48-0.91) for age <20 years relative to age 34-49 years, 1.43 (95% CI, 1.03-1.97) for secondary and higher education relative to no education, 1.83 (95% CI, 1.47-2.27) for para 1 relative to para ≥5, 6.66 (95% CI, 5.43-8.15) for ≥4 ANC visits relative to no visit, 1.37 (95% CI, 1.21-1.57) for knowledge of danger signs of pregnancy, 1.62 (95% CI, 1.38-1.90) for radio relative to no exposure, and 2.71 (95% CI, 2.25-3.27) for rich households relative to poor ones. Since women's education and knowledge about danger signs of pregnancy were significant factors of both ANC and SBA, educating women may be an effective step in promoting safe maternal health.
    No preview · Article · Dec 2015 · Nagoya journal of medical science
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    ABSTRACT: Several case-control studies have reported that patients with diabetes mellitus (DM) had a higher prevalence of Helicobacter pylori infection than those without DM, but these findings remain equivocal. Additionally, there are few studies examining associations between East Asian CagA-positive H. pylori and DM. This cross-sectional study aimed to investigate whether H. pylori infection was a possible risk factor for DM in a general Japanese population. The study included 5165 subjects (1467 men, 3698 women) aged 35-69 years from the Daiko Study, part of the Japan Multi-Institutional Collaborative Cohort Study. A urinary anti-H. pylori antibody was used to detect H. pylori infection. The medical history of physician-diagnosed DM was confirmed by self-administered questionnaire. The odds ratios (ORs) and their 95 % confidence intervals (CIs) for DM (current and former) were calculated using unconditional logistic regression analysis, adjusting for age, sex, educational status, alcohol use, smoking status, body mass index, energy intake, and physical activity. The prevalence of DM was 4.6 % (95 % CI 3.7-5.6 %) among 1878 participants with H. pylori infection and 3.2 % (2.6-3.8 %) among 3287 without the infection (p = 0.009). The crude, age-adjusted, and multivariate-adjusted ORs for DM in those with the infection relative to those without were 1.47 (95 % CI 1.10-1.97), 1.02 (0.76-1.38), and 0.97 (0.71-1.32), respectively. We found a significantly higher DM prevalence among those with H. pylori infection than among those without. However, almost all the difference in prevalence could be explained by the older age of those infected. Our findings did not support an association between H. pylori infection and DM.
    Full-text · Article · Nov 2015 · SpringerPlus
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    ABSTRACT: Hyperuricaemia is an undisputed and highly predictive biomarker for cardiovascular risk. SLC17A1, expressed in the liver and kidneys, harbours potent candidate single nucleotide polymorphisms that decrease uric acid levels. Therefore, we examined SLC17A1 polymorphisms (rs1165196, rs1179086, and rs3757131), which might suppress cardiovascular risk factors and that are involved in liver functioning, via a large-scale pooled analysis of the Japanese general population in a cross-sectional study. Using data from the Japan Multi-Institutional Collaborative Cohort Study, we identified 1842 participants of both sexes, 35-69-years-old, having the requisite data, and analysed their SLC17A1 genotypes. In men, logistic regression analyses revealed that minor alleles in SLC17A1 polymorphisms (rs1165196 and rs3757131) were associated with a low-/high-density lipoprotein cholesterol ratio >2.0 (rs1165196: odds ratio [OR], 0.703; 95% confidence interval [CI], 0.536-0.922; rs3757131: OR, 0.658; 95% CI, 0.500-0.866), and with homocysteine levels of >10.0 nmol/mL (rs1165196: OR, 0.544; 95% CI, 0.374-0.792; rs3757131: OR, 0.509; 95% CI, 0.347-0.746). Therefore, these polymorphisms had dominant negative effects on cholesterol homeostasis and hyperhomocysteinaemia, in men, independent of alcohol consumption, physical activity, or daily energy and nutrition intake. Thus, genetic variants of SLC17A1 are potential biomarkers for altered cholesterol homeostasis and hyperhomocysteinaemia in Japanese men.
    Full-text · Article · Nov 2015 · Scientific Reports
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    R. Okada · Y. Yasuda · K. Tsushita · K. Wakai · N. Hamajima · S. Matsuo
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    ABSTRACT: Background and aims: To elucidate implication of upper-normal waist circumference (WC), we examined whether the normal range of WC still represents a risk of metabolic syndrome (MetS) or non-adipose MetS components among normal-weight subjects. Methods and results: A total of 173,510 persons (100,386 men and 73,124 women) with normal WC (<90/80 cm in men/women) and body mass index (BMI) of 18.5-24.9 were included. Subjects were categorized as having low, moderate, and upper-normal WC for those with WC < 80, 80-84, and 85-89 cm in men and <70, 70-74, and 75-79 cm in women, respectively. The prevalence of all the non-adipose MetS components (e.g. prediabetes and borderline dyslipidemia) was significantly higher in subjects with upper-normal WC on comparison with those with low WC. Overall, the prevalence of MetS (having three or more of four non-adipose MetS components) gradually increased with increasing WC (12%, 21%, and 27% in men and 11%, 14%, and 19% in women for low, moderate, and upper-normal WC, respectively). Moreover, the risk of having a greater number of MetS components increased in subjects with upper-normal WC compared with those with low WC (odds ratios for the number of one, two, three, and four MetS components: 1.29, 1.81, 2.53, and 2.47 in men and 1.16, 1.55, 1.49, and 2.20 in women, respectively). Conclusion: Upper-normal WC represents a risk for acquiring a greater number of MetS components and the early stage of MetS components (prediabetes and borderline dyslipidemia), after adjusting for BMI, in a large general population with normal WC and BMI.
    Full-text · Article · Nov 2015 · Nutrition, metabolism, and cardiovascular diseases: NMCD
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    ABSTRACT: The increase in contraceptive use in Afghanistan has been frustratingly slow from 7.0% in 2003 to 11.3% in 2012. Data on contraceptive use and influencing factors were obtained from Afghanistan Health Survey (AHS) 2012, which had been collected through interview-led questionnaire from 13,654 current married women aged 12-49 years. Odds ratio (OR) and 95% confidence interval (CI) of contraceptive use were estimated by logistic regression analysis. When adjusted for age, residence, region, education, media, and wealth index, significant OR was obtained for parity (OR of 6 or more children relative to 1 child was 3.45, and the 95%CI 2.54-4.69), number of living sons (OR of 5 or more sons relative to no son was 2.48, and the 95%CI 1.86-3.29), wealth index (OR of the richest households relative to the poorest households was 2.14, and the 95%CI 1.72-2.67), antenatal care attendance (OR relative to no attendance was 2.13, and the 95%CI 1.74-2.62), education (OR of secondary education or above relative to no education was 1.62, and the 95%CI 1.26-2.08), media exposure (OR of at least some exposure to electronic media relative to no exposure was 1.15, and the 95%CI 1.01-1.30), and child mortality experience (OR was 0.88, and the 95%CI 0.77-0.99), as well as age, residence (rural/urban), and region. This secondary analysis based on AHS 2012 showed the findings similar to those from the previous studies in other developing countries. Although the unique situation in Afghanistan should be considered to promote contraceptive use, the background may be common among the areas with low contraceptive use.
    No preview · Article · Nov 2015 · Nagoya journal of medical science
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    ABSTRACT: Aims: Brain-muscle-Arnt-like protein-1 (BMAL1) and BMAL2 genes are essential components of the circadian clock, and are considered to be involved in glucose homeostasis. We examined whether single nucleotide polymorphisms (SNPs) of BMAL1 and BMAL2 were associated with the prevalence of type 2 diabetes (T2DM) in the general Japanese population. Methods: We studied 2467 subjects (1232 men and 1235 women, 35-69 years old), including 105 men and 57 women with T2DM, from the participants of the Japan Multi-institutional Collaborative Cohort Study. The association between SNPs in the BMAL1 (rs11022775 and rs2290035) and BMAL2 (rs7958822) genes and T2DM were analyzed by multiple logistic regression after adjustment for potential confounders. Analysis was also performed after stratification by body mass index (≥25kg/m(2) and <25kg/m(2)) to investigate an interaction between genotypes and obesity. Results: The A/G and A/A genotypes of BMAL2 rs7958822 showed significantly higher adjusted odds ratios (OR) for T2DM than the G/G genotype among obese men (OR=2.2, 95% confidence intervals [CI] 1.1, 4.6, P for interaction=0.0495) and obese women (OR=2.7, 95% CI 1.1, 6.7, P for interaction=0.199). There were no significant associations between BMAL1 rs11022775 or rs2290035 genotypes and T2DM. Conclusions: To the best of our knowledge, this is the first study to show the significant association between BMAL2 rs7958822 genotype and T2DM among obese subjects.
    No preview · Article · Oct 2015 · Diabetes research and clinical practice
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    ABSTRACT: Background Although Bangladesh has achieved tremendous success in health care over the last four decades, it still lagged behind in the areas of maternal and child malnutrition and primary health care (PHC). To increase access to PHC, the Bangladesh government established approximately 18,000 community clinics (CCs). The purpose of this study was to examine the associations of socioeconomic determinants of women aged 12–49 years with the CCs awareness and visitation. Methods We analyzed secondary data provided by Bangladesh Demographic and Health Survey-2011. A two-stage cluster sampling was used to collect the data. A total of 18,222 ever married women aged 12–49 years were identified from selected households and 17,842 were interviewed. The main outcome measures of our study were awareness and visitation of CCs. Bivariate logistic regression was used to calculate odds ratio (OR) and 95 % confidence interval (CI) to examine the associations between the awareness and visiting CCs with socioeconomic determinants. Results Low prevalence of awareness about CC (18 %) was observed among studied women and only 17 % of them visited CCs. Significant associations (P < 0.05) with CCs awareness and visitation were observed among aged 20–29 years (adjusted OR = 1.18; 95 % CI = 1.03–1.35 and adjusted OR = 1.49; 95 % CI = 1.05–2.11), primary education (adjusted OR = 1.20; 95 % CI = 1.08–1.34 and adjusted OR = 1.37; 95 % CI = 1.05–1.78), and poorest family (adjusted OR = 1.21; 95 % CI = 1.03–1.42 and adjusted OR = 2.36; 95 % CI = 1.56–3.55, respectively), after controlling potential confounders. Conclusions Awareness and visitation of CCs were found to be positively associated with lower economic conditions, young age, and primary education. Awareness and access to CCs might be increased through community activities that involve health care workers. The government should also lower barriers to PHC access through CCs by providing adequate logistics, such as human resources and equipment.
    Full-text · Article · Oct 2015 · BMC Research Notes
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    ABSTRACT: Background: Circadian rhythm disruption is recognized as the cause of various health disorders. This study evaluated associations between single nucleotide polymorphisms in the core circadian gene, CLOCK, and prevalent type 2 diabetes in the Japanese population. Methods: We analyzed cross-sectional data from 2,485 subjects (1,243 men and 1,242 women; age, 35-69 years) who were enrolled in the baseline surveys of the Japan Multi-institutional Collaborative Cohort (J-MICC) Study. Associations between 3 CLOCK gene polymorphisms (rs1801260, rs3736544, and rs4864548) and prevalent obesity (BMI ≥25 kg/m(2) ), overweight (BMI ≥23 kg/m(2) ), and diabetes were evaluated by logistic regression analyses; haplotype analysis and stratified analyses for prevalent diabetes were also conducted. Results: Compared to those who were homozygous for the respective major alleles, subjects with the rs1801260 minor allele C showed a significantly higher odds ratio (95% CI) of 1.5 (1.1-2.1) for prevalent diabetes, after adjustment for potential confounding factors, including BMI. When stratified by overweight, the associations between rs1801260 and prevalent diabetes were marked and significant in non-overweight subjects but were not significant in overweight subjects. The TGA (rs1801260 - rs3736544 - rs4864548) haplotype was associated with lower prevalence of diabetes, and the CGG haplotype was associated with higher prevalence of diabetes. Conclusions: CLOCK gene variants and related haplotypes are associated with prevalent type 2 diabetes in the Japanese population in whom obesity is less common, and the association between a CLOCK gene variants at rs1801260 and prevalent diabetes is enhanced in normal-build subjects.
    No preview · Article · Sep 2015 · Journal of Diabetes
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    ABSTRACT: Objective: Extraovarian sex hormone production plays an important role in estrogen biosynthesis in postmenopausal women. We examined possible associations between serum sex hormone level and polymorphisms in CYP19A1, HSD17B1, and HSD17B2. We also assessed possible interaction between these polymorphisms and current overweight. Methods: We conducted a cross-sectional study. 785 Japanese natural postmenopausal women were randomly selected from the Japan Multi-Institutional Collaborative Cohort (J-MICC) Study database. Information on lifestyle factors was obtained from a self-administered questionnaire. Serum estrogens and androgens levels were measured by liquid chromatography-tandem mass spectrometry. Four tag SNPs (single nucleotide polymorphisms) of CYP19A1, one missense SNP of HSD17B1 and three tag SNPs of HSD17B2 were examined by Invader assay. A trend test was conducted using linear regression. Results: After adjustment for multiple comparisons, we found that rs4441215 and rs936306 in CYP19A1 and rs4888202 and rs2955160 in HSD17B2 were associated with differences in serum estrone level. Further, rs4441215 and rs936306 were associated with differences in serum estradiol level. None of these polymorphisms showed a significant interaction with current body mass index (BMI). Conclusions: Our findings suggested that CYP19A1 and HSD17B2 polymorphisms might be associated with circulating sex hormone levels in Japanese postmenopausal women, independent of current BMI.
    No preview · Article · Sep 2015 · Maturitas
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    ABSTRACT: Occupation could affect the distribution of smoking status of workers, and the success of smoking cessation among workers depends partly on worksite conditions. Blue collar workers have been identified as a high-risk group for smoking. The aim of the present study was to examine trends in smoking rates among urban civil servants in Japan according to occupational categories. Subjects were urban civil servants aged 30-59 years. They annually reported smoking status in a questionnaire in a worksite health check-up each year from 2004 to 2011. Urban civil servants reported substantially lower current smoking rates than national smoking rates in Japan (20.2%, 23.8%, and 27.0% for males in their 30s, 40s, and 50s and 2.4%, 6.3%, and 9.5% for females, respectively, in 2011). In analysis by occupational categories, current smoking rates declined among all groups except female white collar workers in their 50s. The current and persistent smoking rates (number of current smokers/[number of ex-smokers and current smokers]) among blue collar workers were higher than those among white collar workers at almost all time points in all age and gender groups. This study found relatively lower current smoking rates among urban civil servants than the national average and higher current and persistent smoking rates in blue collar workers than in white collar workers among them. These results would help to make suitable worksite smoking cessation policies for each occupational category.
    No preview · Article · Aug 2015 · Nagoya journal of medical science
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    ABSTRACT: Little is known as to whether the interleukin4 (IL4) gene polymorphisms in recipients or donors affect the incidence of acute cellular rejection (ACR) following living donor liver transplantation (LDLT). Therefore, we determined the effect of IL4 T-33C polymorphisms in recipients and donors on ACR in a large cohort of patients that underwent LDLT. We examined 155 LDLT cases treated at Nagoya University or Kyoto University, Japan, between 2004 and 2009. IL4 T-33C polymorphisms were analyzed in recipients and donors. Forty-seven recipients (30.3%) developed early ACR. The genotype frequency of IL4 T-33C in the recipients was associated with ACR incidence (P=0.008, P<0.0125 considered significant). Patients with the IL4-33C carrier genotype (C/C or C/T) were significantly associated with a higher incidence of ACR relative to those with the T/T genotype (OR=3.27, 95% CI: 1.56-6.88, P=0.002). The genotype frequencies of IL4 T-33C in the donors were not associated with rejection incidence. In addition, there was no significant effect of IL4 T-33C genotype combinations on ACR incidence in donors and recipients. Genotyping of IL4 T-33C in recipients might be useful to stratify the liver transplant recipients according to their risk of ACR. Copyright © 2015 Elsevier Masson SAS. All rights reserved.
    No preview · Article · Jul 2015 · Gastroentérologie Clinique et Biologique
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    ABSTRACT: Hearing impairment is one of the most common sensory disorders that affect ~1 in 1000 children, and half of them are considered to be hereditary. Information about the carrier frequencies of mutations that underlie autosomal recessive disorders is indispensable for accurate genetic counseling to predict the probability of patients' children's disease. However, there have been few reports specific to the Japanese population. GJB2 mutations are reported to be the most frequent cause of hereditary hearing loss, and the mutation spectrum and frequency of GJB2 mutations were reported to vary among different ethnic groups. In this study, we investigated the carrier frequency of GJB2 mutations and the mutation spectrum in 509 individuals randomly selected from the general Japanese population. We show that the carrier frequencies of the two most common pathogenic mutations are 1.57% (8/509) for c.235delC and 1.77% (9/509) for p.Val37Ile. In addition to these mutations, we found two pathogenic variants (p.[Gly45Glu;Tyr136*] and p.Arg143Trp), and the total carrier frequency was estimated to be around 3.73% (19/509). We also detected six unclassified variants, including two novel variants (p.Cys60Tyr and p.Phe106Leu), with the former predicted to be pathogenic. These findings will provide indispensable information for genetic counseling in the Japanese population.Journal of Human Genetics advance online publication, 16 July 2015; doi:10.1038/jhg.2015.82.
    Preview · Article · Jul 2015 · Journal of Human Genetics
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    ABSTRACT: Objective To examine the association between an IL6 (Interleukin-6) polymorphism (C-634G or rs1800796) and tooth loss, and an interaction between the polymorphism and smoking habits for the loss.Material and methodsOur subjects were 4,917 check-up examinees ages 35–69. They reported tooth loss and lifestyle in a questionnaire. We regressed the number of teeth on the IL6 genotype, sex, age, smoking, drinking, diabetes, hypertension, physical activity, energy intake, education and brushing. We further estimated multivariate-adjusted odds ratios (ORs) for having <20 teeth.ResultsParticipants with a GG genotype tended to have less teeth than those with CC; β = −0.798 (95% confidence interval [CI] = −1.501–−0.096). Subjects with a GG genotype were more likely to have <20 teeth than those with CC; OR was 1.56 (95% CI = 1.08–2.25). Association between current smoking and tooth loss was stronger among those with GG than among those with CC. In a multiple regression analysis, a significant interaction was found between GG genotype and current smoking in the prediction of tooth loss (P = 0.018).Conclusion The IL6 C-634G polymorphism was significantly associated with tooth loss. Our results suggest greater effects of smoking on tooth loss in GG genotype individuals.This article is protected by copyright. All rights reserved.
    No preview · Article · May 2015 · Oral Diseases
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    ABSTRACT: Retrospective case-controlled studyObjective. To investigate the incidence of adjacent segment degeneration (ASD) and the associated risk factors over a period of at least 10 years after posterior lumbar interbody fusion (PLIF). ASD is a problematic sequelae after spinal fusion surgery. Few long-term follow-up studies have investigated ASD after PLIF; thus, magnetic resonance imaging (MRI) data available for the evaluation of postoperative changes associated with ASD are limited. One hundred one patients were retrospectively enrolled. The minimum follow-up was 10 years after surgery. Preoperative and postoperative (2, 5, and 10 years after surgery) X-ray and MRI images were evaluated. Disc height, vertebral slip, and intervertebral angle were examined on X-ray images. Disc degeneration and spinal stenosis on MRI images were evaluated. Risk factors for developing early-onset radiographic ASD were evaluated using a multivariate logistic regression analysis. The degenerative changes in disc height, vertebral slip, and intervertebral angle on X-ray 10 years after surgery were found in 12, 36 and 17 cases, respectively, at the cranial-adjacent level and in 3, 6 and 11 cases, respectively, at the caudal-adjacent level. Increased disc degeneration and spinal stenosis worsening were observed in 62 and 68 cases, respectively, at the cranial-adjacent level and in 25 and 12 cases, respectively, at the caudal-adjacent level on MRI 10 years after surgery. Ten patients (9.9%) required re-operation, and 80% of revision surgeries were performed >5 years after the initial surgery. High pelvic incidence was a risk factor for developing early-onset radiographic ASD. The majority of the re-operations for ASD were performed >5 years after the initial lumbar fusion surgery, although the progression of radiographic ASD began in the early postoperative period. A high degree of pelvic incidence was a risk factor for developing early-onset radiographic ASD. Obtaining appropriate lumbar lordosis in PLIF is important for preventing ASD.
    No preview · Article · Apr 2015 · Spine
  • Piseth Narin · Nobuyuki Hamajima · Samnang Kouy · Tomoya Hirosawa · Sokha Eav
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    ABSTRACT: Background: Hepatocellular carcinoma (HCC) is one of the most frequent cancers in South East Asian countries including Cambodia, where prevalence of chronic carriers of hepatitis B and C virus (HBV and HCV) is reported to be very high. We reviewed HCC cases admitted to a cancer hospital in Phnom Penh, which is the only one hospital for cancer treatment and care in Cambodia during the study period. Materials and methods: Information was collected from medical records of 281 cases (210 males and 71 females) diagnosed as primary HCC from 2006 to 2011. Results: The subjects were 7-81 years old with a median age of 53 years. Hypochondriac pain was the most common complained symptom (74%). One third of the cases presented with jaundice. Nearly half had ascites at their first visit. One third had liver cirrhosis. Nearly three fourths of the cases presented with tumor sized more than 50 mm in diameter, and in almost all cases (97.4%) the size was more than 20 mm. Among 209 subjects tested, hepatitis virus carriers were 75.6%; 46.4% for HBV only, 21.5% for HCV only, and 7.7% for both viral infections. Median age of patients with HBV was about ten years younger than those with HCV. Conclusions: This study revealed the characteristics of HCC cases in Cambodia, although there were several limitations. Most HCC cases were infected with HBV and/or HCV, and diagnosed at late stages with complications. This implicated that public health intervention to prevent HBV and HCV infection is of high priority.
    No preview · Article · Feb 2015 · Asian Pacific journal of cancer prevention: APJCP
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    ABSTRACT: Although many single nucleotide polymorphisms (SNPs) have been identified to be associated with metabolic syndrome (MetS), there was only a slight improvement in the ability to predict future MetS by the simply addition of SNPs to clinical risk markers. To improve the ability to predict future MetS, combinational effects, such as SNP-SNP interaction, SNP-environment interaction, and SNP-clinical parameter (SNP × CP) interaction should be also considered. We performed a case-control study to explore novel SNP × CP interactions as risk markers for MetS based on health check-up data of Japanese male employees. We selected 99 SNPs that were previously reported to be associated with MetS and components of MetS; subsequently, we genotyped these SNPs from 360 cases and 1983 control subjects. First, we performed logistic regression analyses to assess the association of each SNP with MetS. Of these SNPs, five SNPs were significantly associated with MetS (P < 0.05): LRP2 rs2544390, rs1800592 between UCP1 and TBC1D9, APOA5 rs662799, VWF rs7965413, and rs1411766 between MYO16 and IRS2. Furthermore, we performed multiple logistic regression analyses, including an SNP term, a CP term, and an SNP × CP interaction term for each CP and SNP that was significantly associated with MetS. We identified a novel SNP × CP interaction between rs7965413 and platelet count that was significantly associated with MetS [SNP term: odds ratio (OR) = 0.78, P = 0.004; SNP × CP interaction term: OR = 1.33, P = 0.001]. This association of the SNP × CP interaction with MetS remained nominally significant in multiple logistic regression analysis after adjustment for either the number of MetS components or MetS components excluding obesity. Our results reveal new insight into platelet count as a risk marker for MetS.
    Full-text · Article · Feb 2015 · PLoS ONE
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    ABSTRACT: Gout, caused by hyperuricaemia, is a multifactorial disease. Although genome-wide association studies (GWASs) of gout have been reported, they included self-reported gout cases in which clinical information was insufficient. Therefore, the relationship between genetic variation and clinical subtypes of gout remains unclear. Here, we first performed a GWAS of clinically defined gout cases only. A GWAS was conducted with 945 patients with clinically defined gout and 1213 controls in a Japanese male population, followed by replication study of 1048 clinically defined cases and 1334 controls. Five gout susceptibility loci were identified at the genome-wide significance level (p<5.0×10(-8)), which contained well-known urate transporter genes (ABCG2 and SLC2A9) and additional genes: rs1260326 (p=1.9×10(-12); OR=1.36) of GCKR (a gene for glucose and lipid metabolism), rs2188380 (p=1.6×10(-23); OR=1.75) of MYL2-CUX2 (genes associated with cholesterol and diabetes mellitus) and rs4073582 (p=6.4×10(-9); OR=1.66) of CNIH-2 (a gene for regulation of glutamate signalling). The latter two are identified as novel gout loci. Furthermore, among the identified single-nucleotide polymorphisms (SNPs), we demonstrated that the SNPs of ABCG2 and SLC2A9 were differentially associated with types of gout and clinical parameters underlying specific subtypes (renal underexcretion type and renal overload type). The effect of the risk allele of each SNP on clinical parameters showed significant linear relationships with the ratio of the case-control ORs for two distinct types of gout (r=0.96 [p=4.8×10(-4)] for urate clearance and r=0.96 [p=5.0×10(-4)] for urinary urate excretion). Our findings provide clues to better understand the pathogenesis of gout and will be useful for development of companion diagnostics. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.
    Full-text · Article · Feb 2015 · Annals of the Rheumatic Diseases
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    Inn Kynn Khaing · Amonov Malik · Myo Oo · Nobuyuki Hamajima
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    ABSTRACT: Myanmar has a high proportion of out-of-pocket (OOP) health care expenditures with limited cost-sharing mechanisms. In Myanmar, there were limited data on the frequency of catastrophic health expenditure (CHE) due to OOP payments, as well as on the factors associated with CHE. This study aimed to investigate health care expenditure, the frequency of CHE, and the factors influencing CHE among households in Magway, Myanmar. A cross-sectional household survey was conducted in 2012 for 700 households (350 in urban areas and 350 in rural areas) in Magway. CHE was defined as a condition wherein the total amount of household health care expenditure was 40% or more of non-food expenditure in the past year. Multiple logistic regression analysis was applied to estimate odds ratios (ORs) and 95% confident intervals (CIs) of CHE. In the previous year, 28.3% of 350 urban households and 51.4% of 350 rural households utilized outpatient services. Households with at least one member admitted to a medical facility were 10.0% and 12.9%, respectively. Those with CHE were 25.2% in the urban areas and 22.7% in the rural areas. The adjusted OR of CHE was 7.79 (95% CI 3.73-16.26) for hospitalization and 1.08 (95% CI 0.36-3.23) for outpatient care, relative to no services used. These findings indicated that nearly one fourth of households in Magway faced CHE due to inpatient care. A safety-net mechanism to protect households from CHE in Myanmar seems essential.
    Preview · Article · Feb 2015 · Nagoya journal of medical science
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    Nobuyuki Katsuda · Tomoya Hirosawa · Joshua A Reyer · Nobuyuki Hamajima
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    ABSTRACT: Public health centers (PHCs, hokenjo in Japanese) are local government authorities responsible for public health in Japan. PHCs have an important role in tuberculosis (TB) control. Typically, their responsibilities include 1) the recommendation to admit infectious TB patients to an isolation ward, 2) health checkups with chest X-ray of those in a close contact with infectious TB patients, and 3) public subsidy of medical expenses for TB treatments. Facing the emergence of multi-drug resistant tuberculosis (MDR-TB), the national TB control program was drastically changed; the Japanese version of the Directly Observed Treatment in Short-course (DOTS) strategy was started in 2005. New roles were added to PHCs' responsibilities; 1) active screening of latent TB infection by interferon gamma release assays for those in a close contact with infectious TB patients, 2) community DOTS to promote treatment adherence to outpatients, 3) cohort analysis of outcomes of TB treatment, and 4) national MDR-TB surveillance. These roles are important in preventing MDR-TB and eliminating TB in Japan.
    Preview · Article · Feb 2015 · Nagoya journal of medical science
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    ABSTRACT: Since 2001, antiretroviral therapy (ART) has been available for people living with HIV (PLHIV) in Lao People's Democratic Republic (PDR). Over 10 years of the ART program many HIV patients were found with advanced-stage AIDS in health care service facilities. This study aimed to examine factors associated with delayed access to ART among PLHIV in the capital of Vientiane. A cross-sectional study was conducted with 283 respondents (131 males and 152 females) aged 15 years or over. In this study, delayed access to ART was defined by a CD4 cell count of less than 350 cells/mm(3) at the first screening, or those who presented with advanced AIDS-related symptoms. The odds ratios (ORs) and 95% confidence intervals (CIs) were estimated by a logistic model. After adjustment, young people (OR=2.17; 95% CI: 1.00-4.68; p=0.049), low education (OR=0.23; 95% CI: 0.10-0.55; p=0.001) and duration between risk behavior and HIV test (OR=3.83; 95% CI: 1.22-12.00; p=0.021) were significantly associated with delayed access to ART. Low perception of high risk behaviors was one of the obstacles leading to delayed testing and inability to access ART. Almost all reported feeling self-stigma, and only 30.5% of men and 23.7% of women disclosed the HIV status to his/her partner/spouse. In conclusion, delayed access to ART was associated with individual factors and exposure to health care facility. In order to improve early detection HIV infection following access to ART, an improvement in perceptional knowledge of HIV, as well as reduction of HIV/AIDS-related stigma, might be needed.
    Preview · Article · Feb 2015 · Nagoya journal of medical science

Publication Stats

12k Citations
1,423.55 Total Impact Points

Institutions

  • 1989-2015
    • Nagoya University
      • • Department of Preventive Medicine
      • • Graduate School of Medicine
      Nagoya, Aichi, Japan
  • 2014
    • National Defense Medical College
      Tokorozawa, Saitama, Japan
  • 2009
    • Fujita Health University
      • Department of Public Health
      Nagoya, Aichi, Japan
    • Fukuoka Dental College
      • Department of Preventive and Public Health Dentistry
      Hukuoka, Fukuoka, Japan
  • 1994-2009
    • Aichi Cancer Center
      Ōsaka, Ōsaka, Japan
  • 2008
    • National Cancer Center, Japan
      • Center for Cancer Control and Information Services
      Edo, Tōkyō, Japan
  • 2003
    • Seoul National University Hospital
      • Department of Surgery
      Sŏul, Seoul, South Korea
  • 2002
    • University of Melbourne
      Melbourne, Victoria, Australia
  • 2001
    • Aichi Prefectural Institute of Public Health
      Nagoya, Aichi, Japan