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KONO K, Fujii H, Watanabe K, Watanabe S, Yamada N, Goto K, Goto S, Nishi S. SAT-275 DIAGNOSTIC VALUE OF B-TYPE NATRIURETIC PEPTIDES FOR SEVERE LEFT VENTRICULAR DIASTOLIC DYSFUNCTION IN ADVANCED CHRONIC KIDNEY DISEASE. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Shimokawa M, Nosaki K, Seto T, Ohashi K, Morise M, Fujiwara Y, Sakakibara J, Murakami H, Yano S, Satouchi M, Matsumoto S, Goto K, Yoh K. Phase II study of crizotinib in Japanese patients with advanced non-small cell lung cancer harboring a MET gene alteration: Co-MET study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz063.079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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78
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Kirita K, Udagawa H, Matsumoto S, Yoh K, Niho S, Goto K. Feasibility and utility of transbronchial cryobiopsy in primary lung cancer: Prospective, single arm study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz065.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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79
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Ohno Y, Egawa T, Yokoyama S, Fujiya H, Sugiura T, Ohira Y, Yoshioka T, Goto K. MENS-associated increase of muscular protein content via modulation of caveolin-3 and TRIM72. Physiol Res 2019; 68:265-273. [PMID: 30628834 DOI: 10.33549/physiolres.933992] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Microcurrent electrical neuromuscular stimulation (MENS) is known as an extracellular stimulus for the regeneration of injured skeletal muscle in sports medicine. However, the effects of MENS-associated increase in muscle protein content are not fully clarified. The purpose of this study was to investigate the effects of MENS on the muscular protein content, intracellular signals, and the expression level of caveolin-3 (Cav-3), tripartite motif-containing 72 (TRIM72) and MM isoenzyme of creatine kinase (CK-MM) in skeletal muscle using cell culture system. C2C12 myotubes on the 7th day of differentiation phase were treated with MENS (intensity: 10-20 microA, frequency: 0.3 Hz, pulse width: 250 ms, stimulation time: 15-120 min). MENS-associated increase in the protein content of myotubes was observed, compared to the untreated control level. MENS upregulated the expression of Cav-3, TRIM72, and CK-MM in myotubes. A transient increase in phosphorylation level of Akt was also observed. However, MENS had no effect on the phosphorylation level of p42/44 extracellular signal-regulated kinase-1/2 and 5'AMP-activated protein kinase. MENS may increase muscle protein content accompanied with a transient activation of Akt and the upregulation of Cav-3 and TRIM72.
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Yamaki A, Akiyama R, Murakami C, Takao S, Murakami Y, Mizuno S, Takahashi D, Kado S, Taketomi A, Shirai Y, Goto K, Sakane F. Diacylglycerol kinase α-selective inhibitors induce apoptosis and reduce viability of melanoma and several other cancer cell lines. J Cell Biochem 2018; 120:10043-10056. [PMID: 30536880 DOI: 10.1002/jcb.28288] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 10/24/2018] [Indexed: 02/02/2023]
Abstract
Diacylglycerol (DG) kinase (DGK), which phosphorylates DG to generate phosphatidic acid (PA), consists of ten isozymes (α-к). Recently, we identified a novel small molecule inhibitor, CU-3, that selectively inhibits the activity of the α isozyme. In addition, we newly obtained Compound A, which selectively and strongly inhibits type I DGKs (α, β, and γ). In the present study, we demonstrated that both CU-3 and Compound A induced apoptosis (caspase 3/7 activity and DNA fragmentation) and viability reduction of AKI melanoma cells. Liquid chromatography-mass spectrometry revealed that the production of 32:0- and 34:0-PA species was commonly attenuated by CU-3 and Compound A, suggesting that lower levels of these PA molecular species are involved in the apoptosis induction and viability reduction of AKI cells. We determined the effects of the DGKα inhibitors on several other cancer cell lines derived from refractory cancers. In addition to melanoma, the DGKα inhibitors enhanced caspase 3/7 activity and reduced the viability of hepatocellular carcinoma, glioblastoma, and pancreatic cancer cells, but not breast adenocarcinoma cells. Interestingly, Western blot analysis indicated that the DGKα expression levels were positively correlated with the sensitivity to the DGK inhibitors. Because both CU-3 and Compound A induced interleukin-2 production by T cells, it is believed that these two compounds can enhance cancer immunity. Taken together, our results suggest that DGKα inhibitors are promising anticancer drugs.
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81
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Honda H, Murakami S, Tagashira Y, Uenoyama Y, Goto K, Takamatsu A, Hasegawa S, Tokuda Y. Efficacy of a Postprescription Review of Broad-Spectrum Antimicrobial Agents With Feedback: A 4-Year Experience of Antimicrobial Stewardship at a Tertiary Care Center. Open Forum Infect Dis 2018; 5:ofy314. [PMID: 30555853 PMCID: PMC6289023 DOI: 10.1093/ofid/ofy314] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 11/16/2018] [Indexed: 12/21/2022] Open
Abstract
Background An inpatient antimicrobial stewardship program is vital for judicious antimicrobial use. We began a hospital-wide, postprescription review with feedback (PPRF) in 2014; the present study evaluated its impact on antimicrobial consumption and clinical outcomes over 4 years. Methods Once-weekly PPRF for carbapenems and piperacillin/tazobactam was implemented. We tracked the data on each antimicrobial use as days of therapy (DOT) per 1000 patient-days (PD). Changes in the incidence of drug-resistant organisms, in-hospital mortality, and length of hospital stay per month were analyzed by an interrupted time series. Results Carbapenem use continued to decline in the preintervention and intervention periods (−0.73 and −0.003 DOT/1000 PD, respectively), and although monthly average use remained low in the intervention period (8.3 DOT/1000 PD), more importantly, the postintervention change in the slope diminished significantly. Piperacillin/tazobactam use showed a steeper decline in the intervention period, but the change in the slope was not statistically significant (change in slope: −0.20 DOT/1000 PD per month [P = .16]). Postintervention use of narrower-spectrum antimicrobials including ampicillin/sulbactam (change in slope: +0.58 DOT/1000 PD per month [P < .001]) increased. The antimicrobial cost and the monthly average length of hospital stay also declined (−37.4 USD/1000 PD per month [P < .001] and −0.04 days per month [P < .001], respectively), whereas few postintervention changes in the incidence of drug-resistant organisms were observed. Conclusions In our study, the 4-year PPRF for broad-spectrum antimicrobials coincided with a reduction in the use of targeted antimicrobials and resulted in an improvement in 1 patient-centered outcome, thus conferring the additional benefit of reducing expenditures for antimicrobials.
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Nakano T, Ogasawara S, Tanaka T, Hozumi Y, Yamaki A, Sakane F, Shirai Y, Nakamura T, Yanaka M, Yamada S, Kaneko MK, Kato Y, Goto K. DgMab-6: Antihuman DGKγ Monoclonal Antibody for Immunocytochemistry. Monoclon Antib Immunodiagn Immunother 2018; 37:229-232. [DOI: 10.1089/mab.2018.0026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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83
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Koyama R, Udagawa H, Sugiyama E, Komuta K, Mori M, Yokoyama T, Sasaki T, Saito H, Ishida H, Nakagawa H, Sekine A, Tamura A, Shingyoji M, Mizuno K, Nakamura A, Kinoshita A, Yamanaka T, Goto K. Randomized phase II study comparing cisplatin + pemetrexed + bevacizumab with carboplatin + paclitaxel + bevacizumab in treatment-naïve advanced non-squamous non-small cell lung cancer (CLEAR study). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy292.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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84
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Ikeda T, Ohashi K, Sekine A, Ohe Y, Tsuda T, Kataoka Y, Hara S, Okamoto N, Kodani M, Matsumoto S, Goto K. Tumor mutation burden (TMB) estimation using small-sized targeted next-generation sequencing (NGS) to predict efficacy of immune checkpoint inhibitors (ICIs) for non-small cell lung cancer (NSCLC). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy292.032] [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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85
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Yoh K, Seto T, Satouchi M, Nishio M, Yamamoto N, Murakami H, Nogami N, Kuroda S, Nomura S, Sato A, Tsuchihara K, Kohno T, Matsumoto S, Goto K. LURET: Final survival results of the phase II trial of vandetanib in patients with advanced RET-rearranged non-small cell lung cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy292.108] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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86
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Harada T, Udagawa H, Sugiyama E, Atagi S, Koyama R, Watanabe S, Nakamura Y, Harada D, Hataji O, Tanaka F, Niimi A, Kida H, Satouchi M, Inoue A, Urata Y, Yamane Y, Yoh K, Yoshioka H, Yamanaka T, Goto K. P1.01-33 Randomized Phase 2 Study Comparing CBDCA+PTX+BEV and CDDP+PEM+BEV in Treatment-Naïve Advanced Non-Sq NSCLC (CLEAR study). J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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87
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Kinoshita I, Goda T, Watanabe K, Maemondo M, Oizumi S, Amano T, Hatanaka Y, Matsuno Y, Nishihara H, Asahina H, Harada T, Goto K, Isobe H, Nishimura M, Dosaka-Akita H. A phase II study of trastuzumab monotherapy in pretreated patients with non-small cell lung cancers (NSCLCs) harboring HER2 alterations: HOT1303-B trial. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy292.112] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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88
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Ota T, Kirita K, Udagawa H, Umemura S, Matsumoto S, Yoh K, Niho S, Ishii G, Goto K. P1.09-33 Validity of Non-Small Cell Lung Cancer Not Otherwise Specified to Use Immunohistochemistry on Treatment Outcome. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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89
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Matsumoto Y, Suzuki A, Shirata T, Takahashi N, Noto K, Goto K, Otani K. Implication of the DGKH genotype in openness to experience, a premorbid personality trait of bipolar disorder. J Affect Disord 2018; 238:539-541. [PMID: 29936393 DOI: 10.1016/j.jad.2018.06.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 06/08/2018] [Accepted: 06/12/2018] [Indexed: 12/25/2022]
Abstract
AIMS The diacylglycerol kinase η gene (DGKH) is one of the few replicated risk genes for bipolar disorder. Meanwhile, specific personality traits, especially openness to experience, have been suggested as premorbid personality traits of the disorder. The aim of the present study was to examine the relation of the DGKH genotype with broad dimensions of personality, to obtain further evidence for its implication in the etiology of bipolar disorder. METHODS The subjects were 319 Japanese healthy volunteers. Personality was assessed by the NEO Personality Inventory-Revised, which has the neuroticism, extraversion, openness to experience, agreeableness and conscientiousness dimensions. The A/G polymorphism of DGKH (rs9525580) was detected by a PCR-RFLP method. The subjects were divided into two groups with respect to the presence or absence of the A allele, which is a putative risk allele for bipolar disorder. RESULTS The group with the A allele had significantly (p < 0.05) higher scores of openness to experience compared to that without this allele. Scores of other dimensions were not different between the two groups. LIMITATIONS The subjects had a homogeneous but rather specific background, and we did not employ a longitudinal design. CONCLUSIONS The present study shows that a bipolar-risk allele of DGKH is associated with higher openness to experience, providing further evidence for the implication of this gene in the etiology of bipolar disorder.
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Ikemura S, Yasuda H, Matsumoto S, Kamada M, Betsuyaku T, Okuno Y, Goto K, Tsuchihara K, Soejima K. Clinical characterization of rare EGFR mutations in non-small cell lung cancer and in silico prediction of drug sensitivity. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy292.043] [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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91
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Ota T, Kirita K, Udagawa H, Umemura S, Matsumoto S, Yoh K, Niho S, Goto K. Efficacy of second-line nivolumab after early time to progression on first-line cytotoxic chemotherapy in patients with advanced non-small cell lung cancer (NSCLC). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy292.100] [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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92
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Barlesi F, Nishio M, Cobo M, Steele N, Paramonov V, Parente B, Dear R, Berard H, Peled N, Seneviratne L, Baldini E, Watanabe S, Goto K, Mendus D, Patel H, Deng Y, Kowanetz M, Hoang T, Lin W, Papadimitrakopoulou V. IMpower132: Efficacy of atezolizumab (atezo) + carboplatin (carbo)/cisplatin (cis) + pemetrexed (pem) as 1L treatment in key subgroups with stage IV non-squamous non-small cell lung cancer (NSCLC). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy424.066] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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93
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Iwama E, Sakai K, Azuma K, Harada D, Nosaki K, Hotta K, Nishio M, Kurata T, Fukuhara T, Akamatsu H, Goto K, Shimose T, Kishimoto J, Nakanishi Y, Nishio K, Okamoto I. P2.13-18 A Multicenter Prospective Biomarker Study to Explore Mechanisms of Afatinib Resistance Based on Digita PCR and Next-Generation Sequencing. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Manno T, Kaneda T, Suzuki M, Goto K, Osaka Y, Miyazaki T, Suzuki A, Kurihara K, Ono Y, Otomo K, Shimizu S, Hirao K. P6467Echocardiographic comparison about left atrium between cryoballoon and radiofrequency ablation in patients with paroxysmal atrial fibrillation. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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95
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Ohno Y, Oyama A, Kaneko H, Egawa T, Yokoyama S, Sugiura T, Ohira Y, Yoshioka T, Goto K. Lactate increases myotube diameter via activation of MEK/ERK pathway in C2C12 cells. Acta Physiol (Oxf) 2018; 223:e13042. [PMID: 29377587 DOI: 10.1111/apha.13042] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 01/16/2018] [Accepted: 01/21/2018] [Indexed: 12/22/2022]
Abstract
AIM Lactate is produced in and released from skeletal muscle cells. Lactate receptor, G-protein-coupled receptor 81 (GPR81), is expressed in skeletal muscle cells. However, a physiological role of extracellular lactate on skeletal muscle is not fully clarified. The purpose of this study was to investigate extracellular lactate-associated morphological changes and intracellular signals in C2C12 skeletal muscle cells. METHODS Mouse myoblast C2C12 cells were differentiated for 5 days to form myotubes. Sodium lactate (lactate) or GPR81 agonist, 3,5-dihydroxybenzoic acid (3,5-DHBA), was administered to the differentiation medium. RESULTS Lactate administration increased the diameter of C2C12 myotubes in a dose-dependent manner. Administration of 3,5-DHBA also increased myotube diameter. Not only lactate but also 3,5-DHBA upregulated the phosphorylation level of mitogen-activated protein kinase kinase 1/2 (MEK1/2), p42/44 extracellular signal-regulated kinase-1/2 (ERK1/2) and p90 ribosomal S6 kinase (p90RSK). MEK inhibitor U0126 depressed the phosphorylation of ERK-p90RSK and increase in myotube diameter induced by lactate. On the other hand, both lactate and 3,5-DHBA failed to induce significant responses in the phosphorylation level of Akt, mammalian target of rapamycin, p70 S6 kinase and protein degradation-related signals. CONCLUSION These observations suggest that lactate-associated increase in the diameter of C2C12 myotubes is induced via activation of GRP81-mediated MEK/ERK pathway. Extracellular lactate might have a positive effect on skeletal muscle size.
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Miyazawa H, Fujita Y, Iwata H, Ishikawa Y, Nishio S, Ishijima K, Shinmei Y, Takeichi T, Goto K, Oi R, Akiyama M, Shimizu H. Two cases of generalized pustular psoriasis complicated by IgG4-related disease. Br J Dermatol 2018; 179:537-539. [PMID: 29709076 DOI: 10.1111/bjd.16712] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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97
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Nakano T, Seino K, Wakabayashi I, Stafforini DM, Topham MK, Goto K. Deletion of diacylglycerol kinase ε confers susceptibility to obesity
via
reduced lipolytic activity in murine adipocytes. FASEB J 2018; 32:4121-4131. [DOI: 10.1096/fj.201701050r] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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98
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Tateuchi H, Akiyama H, Goto K, So K, Kuroda Y, Ichihashi N. Sagittal alignment and mobility of the thoracolumbar spine are associated with radiographic progression of secondary hip osteoarthritis. Osteoarthritis Cartilage 2018; 26:397-404. [PMID: 29269327 DOI: 10.1016/j.joca.2017.12.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 12/04/2017] [Accepted: 12/08/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To identify predictors of radiographic progression of hip osteoarthritis (OA) over 12 months among functional hip impairments and spinal alignment and mobility. DESIGN Fifty female patients with secondary hip OA, excluding those 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 over 12 months (>0.5 mm in JSW) as dependent variable, logistic regression analyses were performed to identify predictors for hip OA progression among functional impairments of the hip and spine with and without adjustment for age, body mass index (BMI), and minimum JSW at baseline. The independent variables were hip pain, Harris hip score (HHS), hip morphological parameters, hip passive range of motion (ROM) and muscle strength, and alignment and mobility of the thoracolumbar spine at baseline. RESULTS Twenty-one (42.0%) patients demonstrated radiographic progression of hip OA. Multivariable logistic regression analysis showed that larger anterior inclination of the spine in standing position (adjusted OR [95% CI], 1.37 [1.04-1.80]; P = 0.028) and less thoracolumbar spine mobility (adjusted OR [95% CI], 0.96 [0.92-0.99]; P = 0.037) at baseline were statistically significantly associated with radiographic progression of hip OA, even after adjustment for age, BMI, and minimum JSW. CONCLUSIONS The findings suggest that spinal alignment and mobility should be considered when assessing risk and designing preventive intervention for radiographic progression of secondary hip OA.
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Tanaka T, Iseki K, Tanaka K, Nakano T, Iino M, Goto K. DGKζ ablation engenders upregulation of p53 level in the spleen upon whole-body ionizing radiation. Adv Biol Regul 2018; 67:93-100. [PMID: 29079355 DOI: 10.1016/j.jbior.2017.09.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 09/25/2017] [Accepted: 09/26/2017] [Indexed: 06/07/2023]
Abstract
The tumor suppressor gene product p53, which coordinates the cellular response to various stresses, is subject to tight regulation by a complex network of signal transduction. The DGK family metabolizes lipidic second messenger diacylglycerol to produce phosphatidic acid. Our earlier studies showed that one isozyme, DGKζ, is involved in the regulatory mechanism of p53. In a cellular model of doxorubicin-induced DNA damage, overexpression of wild-type DGKζ suppresses p53 protein induction and reduces apoptosis, whereas knockdown of DGKζ upregulates p53 protein level and promotes apoptosis. Further examination reveals that DGKζ facilitates p53 degradation via ubiquitin-proteasome system in the cytoplasm. However, it remains undetermined whether the regulatory mechanism of DGKζ on p53 function found in cell-based experiments is also functional at the animal level. This study was conducted to elucidate this point using an experiment with DGKζ-KO mice under DNA damage induced by whole-body ionizing radiation. Our results reveal that p53 protein is induced robustly in the spleen of DGKζ-KO mice upon exposure to ionizing radiation, thereby promoting apoptosis in this organ. Taken together, the results demonstrate that DGKζ plays a sentinel role in p53 expression at the cellular and organismal levels after DNA damaging stress conditions.
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Shirata T, Suzuki A, Matsumoto Y, Takahashi N, Noto K, Goto K, Otani K. Relation of high neuroticism with increased methylation of the BDNF gene. Neuropsychiatr Dis Treat 2018; 14:1787-1793. [PMID: 30022827 PMCID: PMC6042484 DOI: 10.2147/ndt.s169787] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Brain-derived neurotrophic factor (BDNF) is a neurotrophin that has an important function in neuroplasticity and neuronal development. It is suggested that increased methylation of the BDNF gene resulting in decreased BDNF activity is associated with depression. Meanwhile, neuroticism is a well-known risk factor for developing depression. In the present study, the relationship between methylation of the BDNF gene and personality traits including neuroticism was examined. SUBJECTS AND METHODS The subjects were 98 healthy Japanese. Methylation levels of the BDNF gene were determined by the bisulfite-pyrosequencing method. Personality traits including neuroticism were assessed by the NEO Personality Inventory-Revised. RESULTS There was a positive correlation between neuroticism scores and methylation levels of the BDNF gene. The subjects with higher neuroticism scores had higher levels of BDNF gene methylation compared with those with lower neuroticism scores. Meanwhile, other personality traits were not associated with BDNF gene methylation. CONCLUSION The present study suggests that high neuroticism is related to increased methylation of the BDNF gene.
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