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Ueno S, Hamada T, Taniguchi S, Ohtani N, Miyazaki S, Mizuta E, Ohtahara A, Ogino K, Yoshida A, Kuwabara M, Yoshida K, Ninomiya H, Kotake H, Taufiq F, Yamamoto K, Hisatome I. Effect of Antihypertensive Drugs on Uric Acid Metabolism in Patients with Hypertension: Cross-Sectional Cohort Study. Drug Res (Stuttg) 2016; 66:628-632. [PMID: 27643410 DOI: 10.1055/s-0042-113183] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Background: Hypertension is a common complication in patients with gout and/or hyperuricemia. Besides, hyperuricemia is a risk factor of gout as well as ischemic heart disease in hypertensive patients. Moreover, the risk of gout is modified by antihypertensive drugs. However, it remains unclear how antihypertensive agents affect uric acid metabolism. Purpose: In the present study, we investigated the uric acid metabolism in treated hypertensive patients to find out whether any of them would influence serum levels of uric acid. Patients and methods: 751 hypertensive patients (313 men and 438 women) under antihypertensive treatment were selected. Blood pressure (BP), serum uric acid (SUA) and serum creatinine (Scr) were measured and evaluated statistically. Results: In patients treated with diuretics, beta-blockers and/or alpha-1 blockers SUA levels were significantly higher than in patients who were not taking these drugs. Besides, the estimated glomerular filtration rate (eGFR) in patients treated with diuretics, beta-blockers and/or alpha-1 blockers was negatively correlated with SUA level. There were gender differences in the effects of beta-blockers and alpha-1 blockers. Multiple regression analysis indicated that both diuretics and beta-blockers significantly contributed to hyperuricemia in patients with medication for hypertension. Conclusion: Diuretics, beta-blockers and alpha-1 blockers reduced glomerular filtration rate and raised SUA levels. Calcium channel blockers, ACE inhibitors and angiotensin receptor blockers, including losartan, did not increase SUA levels.
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Yoshioka H, Nakagawa K, Shindou H, Ono Y, Kawakami A, Mabuchi N, Arita S, Fujii K, Hamada T, Ishida O, Miyakoshi K, Uto T. MR Imaging of the Liver before and after Transcatheter Hepatic Chemo-Embolization for Hepatocellular Carcinoma. Acta Radiol 2016. [DOI: 10.1177/028418519003100112] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Transcatheter chemo-embolization (TCE) in hepatocellular carcinoma (HCC) was performed in 38 patients. The patients were examined by MR imaging before TCE as well as one week and 4 to 5 weeks after TCE. The tumor signal intensity in T2 weighted images increased in 13 cases and decreased in 19 cases after TCE. Increased intensity seemed to reflect intra-tumoral hemorrhage or liquefaction accompanying tumor necrosis. Decreased intensity seemed to reflect coagulation necrosis. In 9 of 18 cases followed over a 2-month period the signal intensity had decreased in both T1 and T2 weighted images. In these patients the tumor showed no recurrence at angiography and the decreased signal seemed to reflect the completion of coagulation necrosis. A hyper- and/or hypointense rim around the tumor appeared in 22 cases. These changes were thought to be perifocal edema or granulation tissue around the tumor. MR imaging was useful in evaluating the necrotic process of the tumor after TCE.
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Fukazawa T, Kikuchi S, Miyagishi R, Miyazaki Y, Yabe I, Hamada T, Sasaki H. HLA-DPB1*0501 is not uniquely associated with opticospinal multiple sclerosis in Japanese patients. Important role of DPB1*0301. Mult Scler 2016; 12:19-23. [PMID: 16459716 DOI: 10.1191/135248506ms1252oa] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Apart from its unique lesion distribution pattern, the opticospinal form of multiple sclerosis (OSMS) is distinct among Japanese patients who satisfy the diagnostic criteria of MS. OSMS has been suggested to be strongly associated with HLA-DPB1*0501 in Japanese. However, association of DPB1*0301 with non-OSMS and lack of DPB1*0301 in OSMS were also reported. To verify the role of DPB1*0501 and DPB1*0301 in Japanese MS patients we determined the frequencies of these alleles in 26 patients with OSMS, 167 with non-OSMS and 156 normal subjects, who were all residents of Hokkaido, the northernmost island of Japan. All (100%) OSMS were negative for DPB1*0301 while 32 (19%) of the non-OSMS were positive for the allele. In DPB1*0301-negatives, the frequencies of DPB1*0501 in OSMS (85%) and non-OSMS (82%) were similar, but both were higher than in the controls (66%). In DPB1*0301-positives, the frequency of DPB1*0501 was low but similar in non-OSMS (12/32; 38%) and controls (6/14; 43%). Periventricular white matter lesions (PVL) were noted in 31 of 32 (97%) DPB1*0301-positive non-OSMS patients but in only 22 out of 135 (16%) DPB1*0301-negative non-OSMS patients and two out of 26 (8%) OSMS patients. Our findings indicate that DPB1*0501 plays an important role in the development of MS in general, but not in OSMS. The strong association of DPB1*0501 with OSMS may be due to the over-representation of the DPB1*0301 allele among individuals in the non-OSMS group. In addition, DPB1*0301 might be relevant to the development of periventricular lesions in Japanese patients with MS.
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Hamada T, Tsuchiya M, Mizutani K, Takahashi R, Muguruma K, Maeda K, Ueda W, Nishikawa K. Levobupivacaine-dextran mixture for transversus abdominis plane block and rectus sheath block in patients undergoing laparoscopic colectomy: a randomised controlled trial. Anaesthesia 2016; 71:411-6. [PMID: 26919568 DOI: 10.1111/anae.13408] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/18/2016] [Indexed: 11/29/2022]
Abstract
We performed a randomised controlled double-blinded study of patients having laparoscopic colectomy with bilateral transversus abdominis plane block plus rectus sheath block, comparing a control group receiving 80 ml levobupivacaine 0.2% in saline with a dextran group receiving 80 ml levobupivacaine 0.2% in 8% low-molecular weight dextran. Twenty-seven patients were studied in each group. The mean (SD) maximum plasma concentration of levobupivacaine in the control group (1410 (322) ng.ml(-1) ) was higher than the dextran group (1141 (287) ng.ml(-1) ; p = 0.004), and was reached more quickly (50.6 (30.2) min vs 73.2 (24.6) min; p = 0.006). The area under the plasma concentration-time curve from 0 min to 240 min in the control group (229,124 (87,254) ng.min.ml(-1) ) was larger than in the dextran group (172,484 (50,502) ng.min.ml(-1) ; p = 0.007). The median (IQR [range]) of the summated numerical pain rating score at rest during the first postoperative 24 h in the control group (16 (9-20 [3-31]) was higher than in the dextran group (8 (2-11 [0-18]); p = 0.0001). In this study, adding dextran to levobupivacaine decreased the risk of levobupivacaine toxicity while providing better analgesia.
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Mishima M, Hamada T, Maharani N, Ikeda N, Onohara T, Notsu T, Ninomiya H, Miyazaki S, Mizuta E, Sugihara S, Kato M, Ogino K, Kuwabara M, Hirota Y, Yoshida A, Otani N, Anzai N, Hisatome I. Effects of Uric Acid on the NO Production of HUVECs and its Restoration by Urate Lowering Agents. Drug Res (Stuttg) 2016; 66:270-4. [DOI: 10.1055/s-0035-1569405] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Oyama N, Matsuda M, Hamada T, Numata S, Teye K, Hashimoto T, Hasegawa M. Two novel missense mutations of STS gene underlie X-linked recessive ichthyosis: understanding of the mutational and structural spectrum. J Eur Acad Dermatol Venereol 2015; 30:1629-31. [PMID: 26387488 DOI: 10.1111/jdv.13231] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tanabe K, Hatanaka N, Kanazawa T, Shinozaki K, Hirabayashi N, Kanou M, Fukuda T, Matsuda H, Takashima H, Takahashi T, Hamada T, Sakimoto H, Ninomiya M. 2320 Efficacy and safety of Trastuzumab in combination with standard S-1 plus CDDP in HER-2 positive advanced gastric cancer; HOG-GC 01, a single-arm phase 2 study. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31236-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hamada T, Shinbo T, Yoshikawa N, Yoshioka H, Tanaka Y, Yoshida K, Uesugi Y, Komori T, Narumi Y. 1844 Preliminary treatment results of new hypoxic radiosensitizer ’KORTUC’ (Kochi oxydol-radiation therapy for unresectable carcinomas) containing hydrogen peroxide and sodium hyaluronate for massive unresectable locally advanced breast cancer. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30794-8] [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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Fujimori I, Yukawa T, Kamei T, Nakada Y, Sakauchi N, Yamada M, Ohba Y, Takiguchi M, Kuno M, Kamo I, Nakagawa H, Hamada T, Igari T, Okuda T, Yamamoto S, Tsukamoto T, Ishichi Y, Ueno H. Design, synthesis and biological evaluation of a novel series of peripheral-selective noradrenaline reuptake inhibitor. Bioorg Med Chem 2015; 23:5000-5014. [DOI: 10.1016/j.bmc.2015.05.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Revised: 05/06/2015] [Accepted: 05/08/2015] [Indexed: 11/29/2022]
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Fujita-Nakata M, Tomioka R, Tanaka K, Nakanishi M, Nagayama S, Takahashi R, Machiya T, Hamada T, Matsui M. Intractable cough as characteristic symptom of neuromyelitis optica and neuromyelitis optica spectrum disorder. Mult Scler 2015. [PMID: 26199354 DOI: 10.1177/1352458515596602] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Ohno T, Mine T, Yoshioka H, Kosaka M, Matsuda K, de Kerckhove M, de Kerckhove C, Eguchi S, Matsuo S, Takashi A, Mishima T, Inoue S, Hamada T. P0032 Effect of compression therapy on chemotherapy-induced peripheral neuropathy in breast cancer treatment: Investigation into restored skin microcirculation homeostasis. Eur J Cancer 2015. [DOI: 10.1016/j.ejca.2015.06.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Ueo D, Ishii N, Hamada T, Teye K, Hashimoto T, Hatano Y, Fujiwara S. Desmocollin-specific antibodies in a patient with Hailey-Hailey disease. Br J Dermatol 2015; 173:307-9. [PMID: 25580559 DOI: 10.1111/bjd.13661] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Miyake T, Yamamoto T, Hirai Y, Otsuka M, Hamada T, Tsuji K, Morizane S, Suzuki D, Aoyama Y, Iwatsuki K. Survival rates and prognostic factors of Epstein-Barr virus-associated hydroa vacciniforme and hypersensitivity to mosquito bites. Br J Dermatol 2014; 172:56-63. [DOI: 10.1111/bjd.13411] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/15/2014] [Indexed: 11/28/2022]
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Ishii N, Furumura M, Hamada T, Mori O, Ohzono A, Ueda A, Karashima T, Nakama T, Tsuruta D, Takedatsu H, Fujita H, Hashimoto T. Oesophageal involvement in epidermolysis bullosa acquisita. Br J Dermatol 2014; 172:288-90. [PMID: 24975454 DOI: 10.1111/bjd.13224] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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40
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Yoshimura K, Ishii N, Hamada T, Abe T, Ono F, Hashikawa K, Fukuda S, Ohyama B, Koga H, Sogame R, Teye K, Ochiai T, Nakajima H, Nakajima K, Iijima S, Kanzaki M, Kojima K, Nagatani T, Fujimoto W, Karashima T, Nakama T, Ohata C, Furumura M, Tsuruta D, Hashimoto T. Clinical and immunological profiles in 17 Japanese patients with drug‐induced pemphigus studied at Kurume University. Br J Dermatol 2014; 171:544-53. [DOI: 10.1111/bjd.12925] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/23/2013] [Indexed: 11/30/2022]
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Omotuyi IO, Hamada T. Dynamical footprint of falcipain-2 catalytic triad in hemoglobin-β-bound state. J Biomol Struct Dyn 2014; 33:1027-36. [PMID: 24943200 DOI: 10.1080/07391102.2014.924878] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Falcipain-2 (FP-2) is a member of papain family of cysteine proteases and the major hemoglobinase of the hemoglobin detoxification and hemozoin polymerization complex localized in the food vacuole of the plasmodium species. FP-2 is currently gaining clinical significance as the drug target of choice in combating malaria epidemic. Here, a theoretical FP-2/hemoglobin complex has been proposed and the dynamical footprint and energetics of binding have been investigated using molecular and quantum mechanics approaches. The mapped interaction interface comprises residues 34-51 of hemoglobin and cysteine-42/histidine-174/glutamine-36/asparagine-173/204 and subsites S1, S1', and S3 of FP-2. In hemoglobin-bound FP-2, asparagine-173 preferentially partners histidine-174, while glutamine-36 is preferred in ligand-free state. Cysteine-42 exhibits dihedral switch from 110° to 30° in free and bound states, respectively, with exclusion of water from the binding core upon hemoglobin binding. Hemoglobin similarly exhibits high occupancy within .2 nm distance with charged amido acid-rich subsites S1 and S3 of FP-2 functioning in tandem to reduce conformational flexibility of hemoglobin and facilitate the formation of a stabilizing anti-parallel β-sheet between Leucine-172-valine-176 of FP-2 and phenylalanine-45-asparate-47 of hemoglobin and to overcome the + 1.13e + 5 eV activation energy required to optimize the FP-2/hemoglobin-β conformation that precedes hydrolysis.
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Setoh M, Ishii N, Kono M, Miyanohana Y, Shiraishi E, Harasawa T, Ota H, Odani T, Kanzaki N, Aoyama K, Hamada T, Kori M. Discovery of the first potent and orally available agonist of the orphan G-protein-coupled receptor 52. J Med Chem 2014; 57:5226-37. [PMID: 24884590 DOI: 10.1021/jm5002919] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
G-protein-coupled receptor 52 (GPR52) is an orphan Gs-coupled G-protein-coupled receptor. GPR52 inhibits dopamine D2 receptor signaling and activates dopamine D1/N-methyl-d-aspartate receptors via intracellular cAMP accumulation, and therefore, GPR52 agonists may have potential as a novel class of antipsychotics. A series of GPR52 agonists with a bicyclic core was designed to fix the conformation of the phenethyl ether moiety of compounds 2a and 2b. 3-[2-(3-Chloro-5-fluorobenzyl)-1-benzothiophen-7-yl]-N-(2-methoxyethyl)benzamide 7m showed potent activity (pEC50 = 7.53 ± 0.08) and good pharmacokinetic properties. Compound 7m significantly suppressed methamphetamine-induced hyperactivity in mice after oral administration of 3 mg/kg without disturbance of motor function.
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Iino Y, Kano T, Adachi F, Suzuki M, Nishikawa R, Ishii N, Ohata C, Furumura M, Hamada T, Hashimoto T. A case of bullous pemphigoid associated with psoriasis vulgaris showing Hailey-Hailey disease-like histopathological changes in regenerated epidermis without genomic mutation in ATP2C1
or ATP2A2
gene. J Eur Acad Dermatol Venereol 2014; 29:1646-8. [DOI: 10.1111/jdv.12521] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hamada T, Nakai Y, Yasunaga H, Isayama H, Matsui H, Takahara N, Sasaki T, Takagi K, Watanabe T, Yagioka H, Kogure H, Arizumi T, Yamamoto N, Ito Y, Hirano K, Tsujino T, Tada M, Koike K. Prognostic nomogram for nonresectable pancreatic cancer treated with gemcitabine-based chemotherapy. Br J Cancer 2014; 110:1943-9. [PMID: 24642625 PMCID: PMC3992497 DOI: 10.1038/bjc.2014.131] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 02/14/2014] [Accepted: 02/20/2014] [Indexed: 12/26/2022] Open
Abstract
Background: A nomogram is progressively being used as a useful predictive tool for cancer prognosis. A nomogram to predict survival in nonresectable pancreatic cancer treated with chemotherapy has not been reported. Methods: Using prospectively collected data on patients with nonresectable pancreatic cancer receiving gemcitabine-based chemotherapy at five Japanese hospitals, we derived a predictive nomogram and internally validated it using a concordance index and calibration plots. Results: In total, 531 patients were included between June 2001 and February 2013. The American Joint Committee on Cancer (AJCC) TNM stages were III and IV in 204 and 327 patients, respectively. The median survival time of the total cohort was 11.3 months. A nomogram was generated to predict survival probabilities at 6, 12, and 18 months and median survival time, based on the following six variables: age; sex; performance status; tumour size; regional lymph node metastasis; and distant metastasis. The concordance index of the present nomogram was higher than that of the AJCC TNM staging system at 12 months (0.686 vs 0.612). The calibration plots demonstrated good fitness of the nomogram for survival prediction. Conclusions: The present nomogram can provide valuable information for tailored decision-making early after the diagnosis of nonresectable pancreatic cancer.
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Tsuchiya M, Kyoh Y, Mizutani K, Yamashita J, Hamada T. Ultrasound-guided single shot caudal block anesthesia reduces postoperative urinary catheter-induced discomfort. Minerva Anestesiol 2013; 79:1381-1388. [PMID: 23811624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Urinary catheter-induced discomfort during the postoperative period can be distressing, and sometimes results in severe restlessness and agitation, especially in middle-aged and elderly male patients. Recent advances in ultrasound technology have increased the consistency, safety, and ease of a caudal block even in older patients. We speculated that an ultrasound-guided caudal block would be reliable and safe as treatment for such postoperative discomfort. METHODS Adult male patients (ASA I-II) undergoing cervical laminoplasty were allocated to either the caudal block (CB, N.=24) or non-block (NB, N.=24) group. Following anesthesia induction, urinary catheterization was performed using a 16 French Foley catheter. Thereafter, an ultrasound-guided caudal block was performed with 8 ml of 0.3% ropivacaine and 100 µg of fentanyl for patients in group CB, while group NB did not receive a caudal block. We assessed urinary catheter-induced discomfort as mild, moderate, or severe at 0, 2, 6, 10, and 18 hours after surgery, and compared the incidence and severity of discomfort between the groups using a randomized double-blind design. RESULTS All caudal blocks were successfully performed with 1 or 2 needle insertions. The incidence of urinary catheter-induced discomfort was significantly reduced in group CB as compared to NB at 0, 2, and 6 hours, while severity was also reduced at 0 and 2 hours. No patient required re-catheterization due to urinary retention after catheter removal. There were no other complications related to the caudal block. CONCLUSION Preoperative ultrasound-guided single shot caudal block anesthesia safely reduced postoperative urinary catheter-induced discomfort in our male patients.
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Ueda A, Ishii N, Teye K, Dainichi T, Ohyama B, Hamada T, Tsuruta D, Kamioka N, Mitsui K, Hosaka H, Soh I, Nakada T, Hashimoto T. Unique herpetiform bullous dermatosis with IgG antibodies to desmocollins 1/3 and LAD-1. Br J Dermatol 2013; 169:719-21. [PMID: 23607807 DOI: 10.1111/bjd.12398] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Okabayashi K, Nagata A, Higuchi T, Hamada T. Video-assisted thoracoscopic layered insertion of fibrin glue and polyglycolic acid sheet directly into ruptured bulla associated refractory secondary pneumothorax. J Cardiothorac Surg 2013. [PMCID: PMC3844734 DOI: 10.1186/1749-8090-8-s1-o300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Hewing B, Parathath S, Chung WK, Astudillo YM, Hamada T, Tallant T, Berisha SZ, Smith JD, Hazen SL, Fisher EA. Differential effects in mice of infused native and MPO-modified ApoA-I on reverse cholesterol transport and atherosclerosis. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p2383] [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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Asano M, Hashimoto K, Saito B, Shiokawa Z, Sumi H, Yabuki M, Yoshimatsu M, Aoyama K, Hamada T, Morishita N, Dougan DR, Mol CD, Yoshida S, Ishikawa T. Design, stereoselective synthesis, and biological evaluation of novel tri-cyclic compounds as inhibitor of apoptosis proteins (IAP) antagonists. Bioorg Med Chem 2013; 21:5725-37. [PMID: 23928071 DOI: 10.1016/j.bmc.2013.07.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Revised: 07/09/2013] [Accepted: 07/10/2013] [Indexed: 01/22/2023]
Abstract
We recently reported the discovery of octahydropyrrolo[1,2-a]pyrazine A as a lead compound for an inhibitor of apoptosis proteins (IAP) antagonist. To develop IAP antagonists with favorable PK profiles, we designed novel tri-cyclic compounds, octahydro-1H-cyclopropa[4,5]pyrrolo[1,2-a]pyrazines 1 and 2 based on co-crystal structural analysis of A with cellular IAP-1 (cIAP-1). The additional cyclopropane moiety was used to block the predicted metabolic site of compound A without detriment to the binding affinity for cIAP. Compounds 1 and 2 were stereoselectively synthesized via intermediates 4a and 5b', which were obtained by Simmons-Smith cyclopropanation of ethylester 3a and silyl ether 3b'. Compounds 1 and 2 showed strong growth inhibition in MDA-MB-231 breast cancer cells and improved metabolic stability in comparison to A. Compound 2 exhibited significant in vivo PD effects to increase tumor necrosis factor-alpha mRNA in a dose dependent manner.
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Hamada T, Nakai Y, Isayama H, Sasaki T, Koike K. Competing risk: a potential risk factor for misleading results of length of stent patency. Endoscopy 2013; 45:72; author reply 72. [PMID: 23254408 DOI: 10.1055/s-0032-1325758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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