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Goto K, Kasama S, Kurabayashi M. A type of anteroseptal left ventricular ballooning in a patient with Takotsubo cardiomyopathy. Neth Heart J 2017; 26:104-105. [PMID: 29119543 PMCID: PMC5783890 DOI: 10.1007/s12471-017-1056-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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102
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Atagi S, Udagawa H, Sugiyama E, Hataji O, Tanaka F, Niimi A, Kida H, Kawa Y, Yamanaka T, Goto K. P1.03-027 Randomized Phase 2 Study Comparing CBDCA+PTX+BEV and CDDP+PEM+BEV in Treatment-Naïve Advanced Non-Sq NSCLC (CLEAR Study). J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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103
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Soo R, Mok T, Shi YK, Zhang L, Lu S, Yang JCH, Nakagawa K, Yamamoto N, Nokihara H, Sugawara S, Nishio M, Takahashi T, Goto K, Chang J, Maemondo M, Ichinose Y, Cheng Y, Lim W, Morita S, Tamura T. EAST-LC: Randomized controlled phase III trial of S-1 versus docetaxel (DOC) in patients with non-small cell lung cancer (NSCLC) who had received a platinum-based treatment: Results from patient-reported outcomes (PROs). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx671.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Nakamura A, Udagawa H, Matsumoto S, Sugawara S, Shingyoji M, Horiike A, Okamoto I, Hida T, Saeki S, Ohe Y, Ogawara D, Kataoka Y, Miyata Y, Mitsufuji H, Kuyama S, Kanemaru R, Kato T, Hirata A, Yoh K, Goto K. Prevalence of NTRK gene fusions in a large cohort of Japanese patients with lung cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx671.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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105
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Nakamura M, Onozawa M, Motegi A, Hojo H, Zenda S, Nakamura N, Udagawa H, Kirita K, Matsumoto S, Umemura S, Yoh K, Niho S, Goto K, Akimoto T. P3.14-001 Impact of PCI on Prognosis of LD-SCLC Through Pattern of Brain Metastases as a First Recurrence Site. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nosaki K, Takeuchi S, Takahara S, Kawakami T, Yoh K, Kono Y, Horiike A, Seto T, Goto K, Yoshimura K, Imai Y, Murayama T, Yano S. Safety of alectinib in non-small cell lung cancer patients with RET fusion gene (ALL-RET): Results from the dose-finding portion of a phase 1/2 study. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx671.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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107
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Nokihara H, Lu S, Mok TSK, Nakagawa K, Yamamoto N, Shi YK, Zhang L, Soo RA, Yang JC, Sugawara S, Nishio M, Takahashi T, Goto K, Chang J, Maemondo M, Ichinose Y, Cheng Y, Lim WT, Morita S, Tamura T. Randomized controlled trial of S-1 versus docetaxel in patients with non-small-cell lung cancer previously treated with platinum-based chemotherapy (East Asia S-1 Trial in Lung Cancer). Ann Oncol 2017; 28:2698-2706. [PMID: 29045553 PMCID: PMC5834128 DOI: 10.1093/annonc/mdx419] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Chemotherapy remains a viable option for the management of advanced non-small-cell lung cancer (NSCLC) despite recent advances in molecular targeted therapy and immunotherapy. We evaluated the efficacy of oral 5-fluorouracil-based S-1 as second- or third-line therapy compared with standard docetaxel therapy in patients with advanced NSCLC. PATIENTS AND METHODS Patients with advanced NSCLC previously treated with ≥1 platinum-based therapy were randomized 1 : 1 to docetaxel (60 mg/m2 in Japan, 75 mg/m2 at all other study sites; day 1 in a 3-week cycle) or S-1 (80-120 mg/day, depending on body surface area; days 1-28 in a 6-week cycle). The primary endpoint was overall survival. The non-inferiority margin was a hazard ratio (HR) of 1.2. RESULTS A total of 1154 patients (577 in each arm) were enrolled, with balanced patient characteristics between the two arms. Median overall survival was 12.75 and 12.52 months in the S-1 and docetaxel arms, respectively [HR 0.945; 95% confidence interval (CI) 0.833-1.073; P = 0.3818]. The upper limit of 95% CI of HR fell below 1.2, confirming non-inferiority of S-1 to docetaxel. Difference in progression-free survival between treatments was not significant (HR 1.033; 95% CI 0.913-1.168; P = 0.6080). Response rate was 8.3% and 9.9% in the S-1 and docetaxel arms, respectively. Significant improvement was observed in the EORTC QLQ-C30 global health status over time points in the S-1 arm. The most common adverse drug reactions were decreased appetite (50.4%), nausea (36.4%), and diarrhea (35.9%) in the S-1 arm, and neutropenia (54.8%), leukocytopenia (43.9%), and alopecia (46.6%) in the docetaxel arm. CONCLUSION S-1 is equally as efficacious as docetaxel and offers a treatment option for patients with previously treated advanced NSCLC. CLINICAL TRIAL NUMBER Japan Pharmaceutical Information Center, JapicCTI-101155.
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Ono A, Takahashi T, Niho S, Yoshida T, Akimoto T, Sakamaki K, Seto T, Nishio M, Yamamoto N, Hida T, Okamoto H, Kurata T, Satouchi M, Goto K, Yamanaka T, Ohe Y. MA 17.06 Safety Data from Randomized Phase II Study of CDDP+S-1 vs CDDP+PEM Combined with TRT for Locally Advanced Non-Squamous NSCLC. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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109
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Misumi Y, Shimokawa T, Okamoto H, Atagi S, Tanaka H, Goto K, Nakagawa K, Hida T, Yamamoto N, Hosomi Y, Kato T, Okamoto I, Ohe Y. P2.15-004 Underrepresentation of Elderly Patients with ED-SCLC as Clinical Trial Candidates (JCOG1201/TORG1528). J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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110
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Suzuki A, Matsumoto Y, Enokido M, Shirata T, Goto K, Otani K. Relationship between interpersonal sensitivity and leukocyte telomere length. BMC MEDICAL GENETICS 2017; 18:112. [PMID: 29017469 PMCID: PMC5634896 DOI: 10.1186/s12881-017-0473-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 10/01/2017] [Indexed: 11/10/2022]
Abstract
BACKGROUND Telomeres are repetitive DNA sequences located at the ends of chromosomes, and telomere length represents a biological marker for cellular aging. Interpersonal sensitivity, excessive sensitivity to the behavior and feelings of others, is one of the vulnerable factors to depression. In the present study, we examined the effect of interpersonal sensitivity on telomere length in healthy subjects. METHODS The subjects were 159 unrelated healthy Japanese volunteers. Mean age ± SD (range) of the subjects was 42.3 ± 7.8 (30-61) years. Interpersonal sensitivity was assessed by the Japanese version of the Interpersonal Sensitivity Measure (IPSM). Leukocyte telomere length was determined by a quantitative real-time PCR method. RESULTS Higher scores of the total IPSM were significantly (β = -0.163, p = 0.038) related to shorter telomere length. In the sub-scale analysis, higher scores of timidity were significantly (β = -0.220, p = 0.044) associated with shorter telomere length. CONCLUSIONS The present study suggests that subjects with higher interpersonal sensitivity have shorter leukocyte telomere length, implying that interpersonal sensitivity has an impact on cellular aging.
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Sato T, Adachi M, Nakamura K, Zushi M, Goto K, Murakami T, Ishiguro K, Shichiji M, Saito K, Ikai T, Osawa M, Kondo I, Nagata S, Ishigaki K. The gross motor function measure is valid for Fukuyama congenital muscular dystrophy. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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112
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Shiota T, Sugie K, Hayashi Y, Goto K, Eura N, Kiriyama T, Nonaka I, Nishino I, Nishino I, Ueno S. Asymmetric skeletal muscle involvement in facioscapulohumeral muscular dystrophy: A neuroimaging study. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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113
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Nakamura K, Goto K, Ishikawa T, Shimazaki R, Matsubara E. Genotype of early death due to cardiac failure in duchenne muscular dystrophy. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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114
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Suzuki K, Tsuji D, Ito K, Kawasaki Y, Yamanaka T, Hashimoto H, Goto K, Matsui R, Seki N, Hama T, Yamamoto N. Risk factors of chemotherapy-induced nausea and vomiting during cisplatin regimen in antiemetic triplet regimen including palonosetron or granisetron: TRIPLE study (phase lll). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx388.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Niho S, Yoshida T, Akimoto T, Sakamaki K, Takahashi T, Seto T, Nishio M, Yamamoto N, Hida T, Okamoto H, Kurata T, Satouchi M, Goto K, Yamanaka T, Ohe Y. Safety data from randomized phase II study of cisplatin (CDDP)+S-1 versus CDDP+pemetrexed (PEM) combined with thoracic radiotherapy (TRT) for locally advanced non-squamous (non-sq) non-small cell lung cancer (NSCLC): SPECTRA study. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx379.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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116
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Usui Y, Kirita K, Matsumoto S, Ohe Y, Nishio M, Seto T, Kodani M, Taima K, Hattori Y, Kohno T, Yoh K, Goto K. Detectability of RET fusions by amplicon-based next generation sequencing in nationwide lung cancer genomic screening project: LC-SCRUM-Japan. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx380.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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117
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Naito S, Sakamoto N, Kotoh S, Goto K, Matsumoto T, Kumazawa J. Correlation between the Expression of P-Glycoprotein and Multidrug-Resistant Phenotype in Transitional Cell Carcinoma of the Urinary Tract. Eur Urol 2017; 22:158-62. [PMID: 1362155 DOI: 10.1159/000474745] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The expression of a multidrug-resistant (MDR) gene product, P-glycoprotein, was examined immunohistochemically in 41 transitional cell carcinomas (TCCs) of the urinary tract. In 23 of these, chemosensitivity to adriamycin (ADM) and vinblastine (VBL) was also assessed by a microtiter succinate dehydrogenase inhibition test and the correlation between the expression of P-glycoprotein and MDR phenotype was investigated. P-glycoprotein was detected in 13 (72.2%) of the 18 untreated TCCs of the upper urinary tract (UUT), 6 (31.6%) of the 19 untreated TCCs of the bladder, and all of the 4 TCCs treated with M-VAC chemotherapy, respectively. Fourteen (87.5%) of the 16 TCCs with a positive expression of P-glycoprotein were resistant to ADM and VBL, whereas all of the 4 TCCs sensitive to both drugs were negative in the expression of P-glycoprotein. The succinate dehydrogenase activity of TCCs with a positive expression of P-glycoprotein was significantly higher than that of TCCs with a negative expression of P-glycoprotein (P < 0.05). Thus, there was a good correlation between the expression of P-glycoprotein and MDR phenotype in the chemosensitivity test. These results suggest that intrinsic MDR exists in some TCCs of the urinary tract, particularly UUT, and that the immunohistochemical investigation of P-glycoprotein may be useful for predicting the MDR phenotype in TCCs of the urinary tract.
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Tateuchi H, Koyama Y, Akiyama H, Goto K, So K, Kuroda Y, Ichihashi N. Daily cumulative hip moment is associated with radiographic progression of secondary hip osteoarthritis. Osteoarthritis Cartilage 2017; 25:1291-1298. [PMID: 28232145 DOI: 10.1016/j.joca.2017.02.796] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 01/16/2017] [Accepted: 02/14/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To investigate whether higher daily cumulative hip moment at baseline is associated with subsequent radiographic progression of hip osteoarthritis (OA) over 12 months. DESIGN Fifty patients with secondary hip OA, excluding patients with end-stage hip OA, participated in this prospective cohort study. Joint space width (JSW) of the hip was measured at baseline and 12 months later. With radiographic progression of hip OA (>0.5 mm/year in JSW) as dependent variable (yes/no), univariable and multivariable logistic regression analyses were performed to assess the association between load-related parameters during gait (i.e., peak hip moment, hip moment impulse, and daily cumulative hip moment [product of hip moment impulse and mean steps/day]) and hip OA progression with and without adjustment for age, body weight, and minimum JSW. RESULTS Of the 50 patients (47.4 ± 10.7 years old), 21 (42.0%) were classified into the progression group. The higher daily cumulative hip moment in the frontal plane at baseline was statistically significantly associated with radiographic progression of hip OA (adjusted odds ratio (OR) [95% confidence interval (CI)], 1.34 [1.06-1.70]; P = 0.013). The higher daily cumulative hip moment in the sagittal plane was also approaching significance in its association with hip OA progression (adjusted OR, 1.80 [0.99-3.26]; P = 0.052). CONCLUSIONS In the female patients with secondary hip OA, higher daily cumulative hip moment, particularly in the frontal plane, was a predictor of radiographic progression of hip OA over 12 months. Reduction in daily cumulative hip moment by modification in gait and physical activity may potentially slow hip OA progression.
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Nakano T, Ogasawara S, Tanaka T, Hozumi Y, Mizuno S, Satoh E, Sakane F, Okada N, Taketomi A, Honma R, Nakamura T, Saidoh N, Yanaka M, Itai S, Handa S, Chang YW, Yamada S, Kaneko MK, Kato Y, Goto K. DaMab-2: Anti-Human DGKα Monoclonal Antibody for Immunocytochemistry. Monoclon Antib Immunodiagn Immunother 2017; 36:181-184. [DOI: 10.1089/mab.2017.0023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Goto K, Doi M, Wang T, Kunisue S, Murai I, Okamura H. G-protein-coupled receptor signaling through Gpr176, Gz, and RGS16 tunes time in the center of the circadian clock [Review]. Endocr J 2017; 64:571-579. [PMID: 28502923 DOI: 10.1507/endocrj.ej17-0130] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
G-protein-coupled receptors (GPCRs) constitute an immensely important class of drug targets with diverse clinical applications. There are still more than 120 orphan GPCRs whose cognate ligands and physiological functions are not known. A set of circadian pacemaker neurons that governs daily rhythms in behavior and physiology resides in the suprachiasmatic nucleus (SCN) in the brain. Malfunction of the circadian clock has been linked to a multitude of diseases, such as sleeping disorders, obesity, diabetes, cardiovascular diseases, and cancer, which makes the clock an attractive target for drug development. Here, we review a recently identified role of Gpr176 in the SCN. Gpr176 is an SCN-enriched orphan GPCR that sets the pace of the circadian clock in the SCN. Even without known ligand, this orphan receptor has an agonist-independent basal activity to reduce cAMP signaling. A unique cAMP-repressing G-protein subclass Gz is required for the activity of Gpr176. We also provide an overview on the circadian regulation of G-protein signaling, with an emphasis on a role for the regulator of G-protein signaling 16 (RGS16). RGS16 is indispensable for the circadian regulation of cAMP in the SCN. Developing drugs that target the SCN remains an unfulfilled opportunity for the circadian pharmacology. This review argues for the potential impact of focusing on GPCRs in the SCN for the purpose of tuning the body clock.
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Mori H, Kato R, Ikeda Y, Goto K, Asano S, Tanaka S, Shiki Y, Iwanaga S, Nishimura S, Muramatsu T, Matsumoto K. P1031Elevated brain natriuretic peptide level can predict the clinical course of paroxysmal atrioventricular block. Europace 2017. [DOI: 10.1093/ehjci/eux151.211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mori H, Kato R, Ikeda Y, Goto K, Asano S, Tanaka S, Shiki Y, Iwanaga S, Nishimura S, Muramatsu T, Matsumoto K. P969Percutaneous lead extraction is safe and effective for right ventricular perforation. Europace 2017. [DOI: 10.1093/ehjci/eux151.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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123
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Umeda K, Nakamura H, Yamamoto K, Nishina N, Yasufuku K, Hirai Y, Hirayama T, Goto K, Hase A, Ogasawara J. Molecular and epidemiological characterization of staphylococcal foodborne outbreak of Staphylococcus aureus harboring seg, sei, sem, sen, seo, and selu genes without production of classical enterotoxins. Int J Food Microbiol 2017; 256:30-35. [PMID: 28582663 DOI: 10.1016/j.ijfoodmicro.2017.05.023] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 05/26/2017] [Accepted: 05/29/2017] [Indexed: 10/19/2022]
Abstract
Staphylococcal food poisoning is the result of consumption of food contaminated with staphylococcal enterotoxins (SEs) produced by Staphylococcus aureus. To date, 23 SEs and SE-like enterotoxins (SEls) have been described in the literature. They are divided into classical SEs (SEA-SEE) and new SE/SEls (SEG-SElX). Some have proved to be foodborne-inducible, but others remain unidentified. In May 2016, at an elderly group home in Osaka city, Japan, an outbreak from foodborne pathogens occurred among lunch party participants. Within 2h 30min to 4h 40min, 15 of 53 participants presented gastrointestinal symptoms of vomiting, diarrhea, and nausea. A subsequent laboratory investigation detected S. aureus from most stool samples from patients, several left-over food items, a kitchen swab, and hand swabs from two food handlers. Classical SEs was not detected from S. aureus isolates or left-over food items. From examination for the presence of SE/SEl genes of 20 kinds by PCR, seg, sei, sem, sen, seo, and selu genes were detected in almost all isolates. These isolates exhibited identical or closely related types by coagulase type (type VII), Sma I digested pulsed-field gel electrophoresis analysis and multi-locus sequence typing (MLST-CC45 lineage). These results suggest that the foodborne outbreak was caused by S. aureus harboring seg, sei, sem, sen, seo, and selu genes without production of classical SEs. Additionally, some S. aureus isolates from human nasal swabs and healthy human feces harboring seg, sei, sem, sen, seo, and selu genes without production of classical SEs were classified into CC45 lineage using MLST. These findings suggest new SE/SEls as a potential cause of foodborne outbreaks.
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Tanaka T, Goto K, Iino M. Cover Image, Volume 232, Number 5, May 2017. J Cell Physiol 2017. [DOI: 10.1002/jcp.25790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Suzuki A, Matsumoto Y, Shirata T, Goto K, Enokido M, Otani K. C3435T polymorphism of the MDR1 gene is not associated with blood levels of hypothalamus-pituitary-adrenal axis hormones in healthy male subjects. GENETICS AND MOLECULAR RESEARCH 2017; 16:gmr-16-01-gmr.16019447. [PMID: 28290618 DOI: 10.4238/gmr16019447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In vitro studies have shown that multidrug resistance protein 1 (MDR1) has an affinity for cortisol; however, in vivo association studies on the relationship between MDR1 gene polymorphisms and blood cortisol levels have produced inconsistent results. Therefore, we examined the effects of the C3435T polymorphism of the MDR1 gene on blood levels of hypothalamus-pituitary-adrenal (HPA) axis hormones such as cortisol and adrenocorticotropic hormone (ACTH) in healthy subjects. The subjects comprised 30 healthy Japanese males. Ten subjects were recruited for each of the C3435T MDR1 genotypes: C/C, C/T, and T/T. Blood samples were taken at 6:00 pm on two occasions with an interval of 2 weeks. Blood levels of cortisol and ACTH were determined by an electrochemiluminescence immunoassay. There were no significant differences in the blood levels of the HPA axis hormones among the MDR1 genotypes. The present study suggests that the C3435T MDR1 polymorphism does not affect blood levels of HPA axis hormones in healthy Japanese males.
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