1
|
Kouzu K, Tsujimoto H, Ishinuki T, Shinji S, Shinkawa H, Tamura K, Uchino M, Ohge H, Shimizu J, Haji S, Mohri Y, Yamashita C, Kitagawa Y, Suzuki K, Kobayashi M, Kobayashi M, Hanai Y, Nobuhara H, Imaoka H, Yoshida M, Mizuguchi T, Mayumi T, Kitagawa Y. The effectiveness of fascial closure with antimicrobial-coated sutures in preventing incisional surgical site infections in gastrointestinal surgery: a systematic review and meta-analysis. J Hosp Infect 2024; 146:174-182. [PMID: 37734678 DOI: 10.1016/j.jhin.2023.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/11/2023] [Accepted: 09/11/2023] [Indexed: 09/23/2023]
Abstract
The aim of this study was to conduct a systematic review and meta-analysis of the efficacy of fascial closure using antimicrobial-sutures specifically for the prevention of surgical site infections (SSIs) in gastrointestinal surgery, as part of the revision of the SSI prevention guidelines of the Japanese Society of Surgical Infectious Diseases (JSSI). We searched CENTRAL, PubMed and ICHUSHI-Web in May 2023, and included randomized controlled trials (RCTs) comparing antimicrobial-coated and non-coated sutures for fascial closure in gastrointestinal surgery (PROSPERO No. CRD42023430377). Three authors independently screened the RCTs. We assessed the risk of bias and the GRADE criteria for the extracted data. The primary outcome was incisional SSI and the secondary outcomes were abdominal wall dehiscence and the length of postoperative hospital stay. This study was supported partially by the JSSI. A total of 10 RCTs and 5396 patients were included. The use of antimicrobial-coated sutures significantly lowered the risk of incisional SSIs compared with non-coated suture (risk ratio: 0.79, 95% confidence intervals: 0.64-0.98). In subgroup analyses, antimicrobial-coated sutures reduced the risk of SSIs for open surgeries, and when monofilament sutures were used. Antimicrobial-coated sutures did not reduce the incidence of abdominal wall dehiscence and the length of hospital stay compared with non-coated sutures. The certainty of the evidence was rated as moderate according to the GRADE criteria, because of risk of bias. In conclusion, the use of antimicrobial-coated sutures for fascial closure in gastrointestinal surgery is associated with a significantly lower risk of SSI than non-coated sutures.
Collapse
Affiliation(s)
- K Kouzu
- Department of Surgery, National Defense Medical College, Japan
| | - H Tsujimoto
- Department of Surgery, National Defense Medical College, Japan.
| | - T Ishinuki
- Department of Nursing, Division of Surgical Science, Sapporo Medical University, Japan
| | - S Shinji
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, Japan
| | - H Shinkawa
- Department of Hepatobiliary-Pancreatic Surgery, Osaka Metropolitan University Graduate School of Medicine, Japan
| | - K Tamura
- Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Japan
| | - M Uchino
- Department of Gastroenterological Surgery, Division of Inflammatory Bowel Disease, Hyogo Medical University, Japan
| | - H Ohge
- Department of Infectious Diseases, Hiroshima University Hospital, Japan
| | - J Shimizu
- Department of Surgery, Toyonaka Municipal Hospital, Japan
| | - S Haji
- Department of Surgery, Soseikai General Hospital, Japan
| | - Y Mohri
- Department of Surgery, Mie Prefectural General Medical Center, Japan
| | - C Yamashita
- Department of Anesthesiology and Critical Care Medicine, Fujita Health University School of Medicine, Japan
| | - Y Kitagawa
- Department of Infection Control, National Center for Geriatrics and Gerontology, Japan
| | - K Suzuki
- Department of Infectious Disease Medicine, School of Medicine, University of Occupational and Environmental Health, Japan
| | - M Kobayashi
- Department of Anesthesiology, Hokushinkai Megumino Hospital, Japan
| | - M Kobayashi
- Laboratory of Clinical Pharmacokinetics, School of Pharmacy, Kitasato University, Japan
| | - Y Hanai
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Toho University, Japan
| | - H Nobuhara
- Department of Dentistry, Hiroshima Prefectural Hospital, Japan
| | - H Imaoka
- Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Japan
| | - M Yoshida
- Department of Hepato-Biliary-Pancreatic and Gastrointestinal Surgery, International University of Health and Welfare, School of Medicine, Japan
| | - T Mizuguchi
- Department of Nursing, Division of Surgical Science, Sapporo Medical University, Japan
| | - T Mayumi
- Department of Intensive Care Unit, Japan Community Healthcare Organization Chukyo Hospital, Japan
| | - Y Kitagawa
- Keio University, School of Medicine, Japan
| |
Collapse
|
2
|
Mizuguchi T, Miyano K, Yamauchi R, Yoshida Y, Takahashi H, Yamazaki A, Ono H, Inagaki M, Nonaka M, Uezono Y, Fujii H. The first structure-activity relationship study of oxytocin as a positive allosteric modulator for the µ opioid receptor. Peptides 2023; 159:170901. [PMID: 36347314 DOI: 10.1016/j.peptides.2022.170901] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/07/2022]
Abstract
Positive allosteric modulators (PAMs) of G protein-coupled receptors (GPCRs) have drawn attention as novel drug candidates. PAMs can enhance the activities of endogenous agonists which are not only secreted at appropriate times and in parts of the body, but also are immediately metabolized. Therefore, they are expected to show fewer side effects than exogeneous orthosteric ligands. Recently, we have reported that oxytocin (OT) functioned as a PAM of the μ opioid receptor (MOR) which was one of the most potent targets for analgesics. OT is thus thought to be a useful compound for the development of novel analgesics. In this study, several OT analogs were synthesized and evaluated with an intact cell-based assay to investigate the crucial structures of OT for exerting the PAM activity. The assay results indicated that the cyclic structure formed by an intramolecular disulfide bond and the three C-terminal residues containing a small Gly residue of OT were essential for their function as a MOR-PAM. Intriguingly, two analogs having an amide or an ethylene tether instead of the intramolecular disulfide bridge did not have any PAM effects. The results suggested that the disulfide linkage of OT would be a key structure for exerting the PAM activity at the MOR.
Collapse
Affiliation(s)
- Takaaki Mizuguchi
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan; Medicinal Research Laboratories, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Kanako Miyano
- Department of Pain Control Research, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Risa Yamauchi
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Yuki Yoshida
- Laboratory of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641, Yamazaki, Noda, Chiba 278-8510, Japan
| | - Hideki Takahashi
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Ami Yamazaki
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Haruka Ono
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Miku Inagaki
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Miki Nonaka
- Department of Pain Control Research, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Yasuhito Uezono
- Department of Pain Control Research, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan.
| | - Hideaki Fujii
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan; Medicinal Research Laboratories, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan.
| |
Collapse
|
3
|
Karasawa Y, Miyano K, Fujii H, Mizuguchi T, Kuroda Y, Nonaka M, Komatsu A, Ohshima K, Yamaguchi M, Yamaguchi K, Iseki M, Uezono Y, Hayashida M. In Vitro Analyses of Spinach-Derived Opioid Peptides, Rubiscolins: Receptor Selectivity and Intracellular Activities through G Protein- and β-Arrestin-Mediated Pathways. Molecules 2021; 26:molecules26196079. [PMID: 34641621 PMCID: PMC8513079 DOI: 10.3390/molecules26196079] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 12/14/2022] Open
Abstract
Activated opioid receptors transmit internal signals through two major pathways: the G-protein-mediated pathway, which exerts analgesia, and the β-arrestin-mediated pathway, which leads to unfavorable side effects. Hence, G-protein-biased opioid agonists are preferable as opioid analgesics. Rubiscolins, the spinach-derived naturally occurring opioid peptides, are selective δ opioid receptor agonists, and their p.o. administration exhibits antinociceptive effects. Although the potency and effect of rubiscolins as G-protein-biased molecules are partially confirmed, their in vitro profiles remain unclear. We, therefore, evaluated the properties of rubiscolins, in detail, through several analyses, including the CellKeyTM assay, cADDis® cAMP assay, and PathHunter® β-arrestin recruitment assay, using cells stably expressing µ, δ, κ, or µ/δ heteromer opioid receptors. In the CellKeyTM assay, rubiscolins showed selective agonistic effects for δ opioid receptor and little agonistic or antagonistic effects for µ and κ opioid receptors. Furthermore, rubiscolins were found to be G-protein-biased δ opioid receptor agonists based on the results obtained in cADDis® cAMP and PathHunter® β-arrestin recruitment assays. Finally, we found, for the first time, that they are also partially agonistic for the µ/δ dimers. In conclusion, rubiscolins could serve as attractive seeds, as δ opioid receptor-specific agonists, for the development of novel opioid analgesics with reduced side effects.
Collapse
Affiliation(s)
- Yusuke Karasawa
- Department of Pain Medicine, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan; (Y.K.); (Y.K.); (A.K.); (M.Y.); (K.Y.); (M.I.); (M.H.)
- Department of Pain Control Research, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (M.N.); (K.O.)
- Medical Affairs, Viatris Pharmaceuticals Japan Inc., 5-11-2, Toranomon, Minato-ku, Tokyo 105-0001, Japan
| | - Kanako Miyano
- Division of Cancer Pathophysiology, National Cancer Center Research Institute, 5-1-1, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan;
| | - Hideaki Fujii
- Laboratory of Medicinal Chemistry and Medicinal Research Laboratories, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan; (H.F.); (T.M.)
| | - Takaaki Mizuguchi
- Laboratory of Medicinal Chemistry and Medicinal Research Laboratories, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan; (H.F.); (T.M.)
| | - Yui Kuroda
- Department of Pain Medicine, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan; (Y.K.); (Y.K.); (A.K.); (M.Y.); (K.Y.); (M.I.); (M.H.)
- Department of Pain Control Research, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (M.N.); (K.O.)
- Department of Anesthesiology and Pain Medicine, Faculty of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Miki Nonaka
- Department of Pain Control Research, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (M.N.); (K.O.)
| | - Akane Komatsu
- Department of Pain Medicine, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan; (Y.K.); (Y.K.); (A.K.); (M.Y.); (K.Y.); (M.I.); (M.H.)
- Department of Pain Control Research, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (M.N.); (K.O.)
- Department of Anesthesiology and Pain Medicine, Faculty of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Kaori Ohshima
- Department of Pain Control Research, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (M.N.); (K.O.)
| | - Masahiro Yamaguchi
- Department of Pain Medicine, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan; (Y.K.); (Y.K.); (A.K.); (M.Y.); (K.Y.); (M.I.); (M.H.)
- Department of Pain Control Research, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (M.N.); (K.O.)
- Medical Affairs, Pfizer Japan Inc., 3-22-7, Yoyogi, Shibuya-ku, Tokyo 151-0053, Japan
| | - Keisuke Yamaguchi
- Department of Pain Medicine, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan; (Y.K.); (Y.K.); (A.K.); (M.Y.); (K.Y.); (M.I.); (M.H.)
- Department of Anesthesiology and Pain Medicine, Faculty of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Masako Iseki
- Department of Pain Medicine, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan; (Y.K.); (Y.K.); (A.K.); (M.Y.); (K.Y.); (M.I.); (M.H.)
- Department of Anesthesiology and Pain Medicine, Faculty of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Yasuhito Uezono
- Department of Pain Medicine, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan; (Y.K.); (Y.K.); (A.K.); (M.Y.); (K.Y.); (M.I.); (M.H.)
- Department of Pain Control Research, The Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan; (M.N.); (K.O.)
- Correspondence:
| | - Masakazu Hayashida
- Department of Pain Medicine, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan; (Y.K.); (Y.K.); (A.K.); (M.Y.); (K.Y.); (M.I.); (M.H.)
- Department of Anesthesiology and Pain Medicine, Faculty of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
| |
Collapse
|
4
|
Itoh K, Nagao SI, Tokunaga K, Hirayama S, Karaki F, Mizuguchi T, Nagai K, Sato N, Suzuki M, Hashimoto M, Fujii H. Visible-Light-Induced Synthesis of 1,2,3,4-Tetrahydroquinolines through Formal [4+2] Cycloaddition of Acyclic α,β-Unsaturated Amides and Imides with N,N-Dialkylanilines. Chemistry 2021; 27:5171-5179. [PMID: 33300620 DOI: 10.1002/chem.202004186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 12/05/2020] [Indexed: 01/01/2023]
Abstract
1,2,3,4-Tetrahydroquinolines should be applicable to the development of new pharmaceutical agents. A facile synthesis of 1,2,3,4-tetrahydroquinolines that is achieved by a photoinduced formal [4+2] cycloaddition reaction of acyclic α,β-unsaturated amides and imides with N,N-dialkylanilines under visible-light irradiation, in which a new IrIII complex photosensitizer, a thiourea, and an oxidant act cooperatively in promoting the reaction, is reported. The photoreaction enables the synthesis of a wide variety of 1,2,3,4-tetrahydroquinolines, while controlling the trans/cis diastereoselectivity (>99:1) and constructing contiguous stereogenic centers. A chemoselective cleavage of an acyclic imide auxiliary is demonstrated.
Collapse
Affiliation(s)
- Kennosuke Itoh
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan.,Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Shun-Ichi Nagao
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Ken Tokunaga
- Division of Liberal Arts, Center for Promotion of Higher Education, Kogakuin University, Tokyo, 192-0015, Japan
| | - Shigeto Hirayama
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan.,Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Fumika Karaki
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan.,Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Takaaki Mizuguchi
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan.,Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Kenichiro Nagai
- Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Noriko Sato
- Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Mitsuaki Suzuki
- Department of Chemistry, Faculty of Science, Josai University, Saitama, 350-0295, Japan
| | - Masashi Hashimoto
- Department of Chemistry, Faculty of Science, Josai University, Saitama, 350-0295, Japan
| | - Hideaki Fujii
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan.,Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| |
Collapse
|
5
|
Itoh K, Nagao S, Tokunaga K, Hirayama S, Karaki F, Mizuguchi T, Nagai K, Sato N, Suzuki M, Hashimoto M, Fujii H. Cover Feature: Visible‐Light‐Induced Synthesis of 1,2,3,4‐Tetrahydroquinolines through Formal [4+2] Cycloaddition of Acyclic α,β‐Unsaturated Amides and Imides with
N
,
N
‐Dialkylanilines (Chem. Eur. J. 16/2021). Chemistry 2021. [DOI: 10.1002/chem.202100129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kennosuke Itoh
- Laboratory of Medicinal Chemistry School of Pharmacy Kitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories School of Pharmacy Kitasato University Tokyo 108-8641 Japan
| | - Shun‐ichi Nagao
- Laboratory of Medicinal Chemistry School of Pharmacy Kitasato University Tokyo 108-8641 Japan
| | - Ken Tokunaga
- Division of Liberal Arts, Center for Promotion of Higher Education Kogakuin University Tokyo 192-0015 Japan
| | - Shigeto Hirayama
- Laboratory of Medicinal Chemistry School of Pharmacy Kitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories School of Pharmacy Kitasato University Tokyo 108-8641 Japan
| | - Fumika Karaki
- Laboratory of Medicinal Chemistry School of Pharmacy Kitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories School of Pharmacy Kitasato University Tokyo 108-8641 Japan
| | - Takaaki Mizuguchi
- Laboratory of Medicinal Chemistry School of Pharmacy Kitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories School of Pharmacy Kitasato University Tokyo 108-8641 Japan
| | - Kenichiro Nagai
- Medicinal Research Laboratories School of Pharmacy Kitasato University Tokyo 108-8641 Japan
| | - Noriko Sato
- Medicinal Research Laboratories School of Pharmacy Kitasato University Tokyo 108-8641 Japan
| | - Mitsuaki Suzuki
- Department of Chemistry Faculty of Science Josai University Saitama 350-0295 Japan
| | - Masashi Hashimoto
- Department of Chemistry Faculty of Science Josai University Saitama 350-0295 Japan
| | - Hideaki Fujii
- Laboratory of Medicinal Chemistry School of Pharmacy Kitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories School of Pharmacy Kitasato University Tokyo 108-8641 Japan
| |
Collapse
|
6
|
Itoh K, Takashino A, Ohtsuka A, Kobe M, Sawamura S, Kato R, Hirayama S, Karaki F, Mizuguchi T, Sato N, Tokunaga K, Toda Y, Suga H, Ishida H, Fujii H. Synthesis of 1,2,5‐Oxadiazinane Derivatives by Photochemical Cycloaddition of Nitrones with Diaminomethanes. CHEMPHOTOCHEM 2020. [DOI: 10.1002/cptc.202000004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kennosuke Itoh
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Atsushi Takashino
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Atsushi Ohtsuka
- Department of Chemistry, Graduate School of ScienceKitasato University Kanagawa 252-0373 Japan
| | - Mizuki Kobe
- Department of Chemistry, Graduate School of ScienceKitasato University Kanagawa 252-0373 Japan
| | - Shunsuke Sawamura
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Ryo Kato
- Department of Materials Chemistry, Faculty of EngineeringShinshu University Nagano 380-8553 Japan
| | - Shigeto Hirayama
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Fumika Karaki
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Takaaki Mizuguchi
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Noriko Sato
- Medicinal Research Laboratories, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Ken Tokunaga
- Division of Liberal Arts Center for Promotion of Higher EducationKogakuin University Tokyo 192-0015 Japan
| | - Yasunori Toda
- Department of Materials Chemistry, Faculty of EngineeringShinshu University Nagano 380-8553 Japan
| | - Hiroyuki Suga
- Department of Materials Chemistry, Faculty of EngineeringShinshu University Nagano 380-8553 Japan
| | - Hitoshi Ishida
- Department of Chemistry, Graduate School of ScienceKitasato University Kanagawa 252-0373 Japan
| | - Hideaki Fujii
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories, School of PharmacyKitasato University Tokyo 108-8641 Japan
| |
Collapse
|
7
|
Itoh K, Takashino A, Ohtsuka A, Kobe M, Sawamura S, Kato R, Hirayama S, Karaki F, Mizuguchi T, Sato N, Tokunaga K, Toda Y, Suga H, Ishida H, Fujii H. Cover Feature: Synthesis of 1,2,5‐Oxadiazinane Derivatives by Photochemical Cycloaddition of Nitrones with Diaminomethanes (ChemPhotoChem 6/2020). CHEMPHOTOCHEM 2020. [DOI: 10.1002/cptc.202000105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kennosuke Itoh
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Atsushi Takashino
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Atsushi Ohtsuka
- Department of Chemistry, Graduate School of ScienceKitasato University Kanagawa 252-0373 Japan
| | - Mizuki Kobe
- Department of Chemistry, Graduate School of ScienceKitasato University Kanagawa 252-0373 Japan
| | - Shunsuke Sawamura
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Ryo Kato
- Department of Materials Chemistry, Faculty of EngineeringShinshu University Nagano 380-8553 Japan
| | - Shigeto Hirayama
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Fumika Karaki
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Takaaki Mizuguchi
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Noriko Sato
- Medicinal Research Laboratories, School of PharmacyKitasato University Tokyo 108-8641 Japan
| | - Ken Tokunaga
- Division of Liberal Arts Center for Promotion of Higher EducationKogakuin University Tokyo 192-0015 Japan
| | - Yasunori Toda
- Department of Materials Chemistry, Faculty of EngineeringShinshu University Nagano 380-8553 Japan
| | - Hiroyuki Suga
- Department of Materials Chemistry, Faculty of EngineeringShinshu University Nagano 380-8553 Japan
| | - Hitoshi Ishida
- Department of Chemistry, Graduate School of ScienceKitasato University Kanagawa 252-0373 Japan
| | - Hideaki Fujii
- Laboratory of Medicinal Chemistry, School of PharmacyKitasato University Tokyo 108-8641 Japan
- Medicinal Research Laboratories, School of PharmacyKitasato University Tokyo 108-8641 Japan
| |
Collapse
|
8
|
Imagawa E, Yamamoto Y, Mitsuhashi S, Isidor B, Fukuyama T, Kato M, Sasaki M, Tanabe S, Miyatake S, Mizuguchi T, Takata A, Miyake N, Matsumoto N. PRUNE1
‐related disorder: Expanding the clinical spectrum. Clin Genet 2018; 94:362-367. [DOI: 10.1111/cge.13385] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 05/16/2018] [Accepted: 05/18/2018] [Indexed: 01/04/2023]
Affiliation(s)
- E. Imagawa
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - Y. Yamamoto
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - S. Mitsuhashi
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - B. Isidor
- Service de Génétique Médicale Hôpital Hôtel‐Dieu, CHU de Nantes Nantes France
| | - T. Fukuyama
- Department of Neurology Nagano Children's Hospital Azumino Japan
| | - M. Kato
- Department of Pediatrics Showa University School of Medicine Tokyo Japan
| | - M. Sasaki
- Department of Child Neurology National Center Hospital, National Center of Neurology and Psychiatry Tokyo Japan
| | - S. Tanabe
- Department of Pediatrics Nihonkai General Hospital Sakata Yamagata Japan
| | - S. Miyatake
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - T. Mizuguchi
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - A. Takata
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - N. Miyake
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - N. Matsumoto
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| |
Collapse
|
9
|
Hamanaka K, Takahashi K, Miyatake S, Mitsuhashi S, Hamanoue H, Miyaji Y, Fukai R, Doi H, Fujita A, Imagawa E, Iwama K, Nakashima M, Mizuguchi T, Takata A, Miyake N, Takeuchi H, Tanaka F, Matsumoto N. Confirmation of
SLC5A7
‐related distal hereditary motor neuropathy 7 in a family outside Wales. Clin Genet 2018; 94:274-275. [DOI: 10.1111/cge.13369] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 04/17/2018] [Accepted: 04/18/2018] [Indexed: 11/29/2022]
Affiliation(s)
- K. Hamanaka
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - K. Takahashi
- Department of Neurology and Stroke Medicine Yokohama City University Graduate School of Medicine Yokohama Japan
| | - S. Miyatake
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
- Clinical Genetics Department Yokohama City University Hospital Yokohama Japan
| | - S. Mitsuhashi
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - H. Hamanoue
- Clinical Genetics Department Yokohama City University Hospital Yokohama Japan
| | - Y. Miyaji
- Department of Neurology and Stroke Medicine Yokohama City University Graduate School of Medicine Yokohama Japan
| | - R. Fukai
- Department of Neurology and Stroke Medicine Yokohama City University Graduate School of Medicine Yokohama Japan
| | - H. Doi
- Department of Neurology and Stroke Medicine Yokohama City University Graduate School of Medicine Yokohama Japan
| | - A. Fujita
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - E. Imagawa
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - K. Iwama
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - M. Nakashima
- Department of Biochemistry Hamamatsu University School of Medicine Hamamatsu Japan
| | - T. Mizuguchi
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - A. Takata
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - N. Miyake
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| | - H. Takeuchi
- Department of Neurology and Stroke Medicine Yokohama City University Graduate School of Medicine Yokohama Japan
| | - F. Tanaka
- Department of Neurology and Stroke Medicine Yokohama City University Graduate School of Medicine Yokohama Japan
| | - N. Matsumoto
- Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
| |
Collapse
|
10
|
Tsuchida N, Nakashima M, Kato M, Heyman E, Inui T, Haginoya K, Watanabe S, Chiyonobu T, Morimoto M, Ohta M, Kumakura A, Kubota M, Kumagai Y, Hamano SI, Lourenco CM, Yahaya NA, Ch'ng GS, Ngu LH, Fattal-Valevski A, Weisz Hubshman M, Orenstein N, Marom D, Cohen L, Goldberg-Stern H, Uchiyama Y, Imagawa E, Mizuguchi T, Takata A, Miyake N, Nakajima H, Saitsu H, Miyatake S, Matsumoto N. Detection of copy number variations in epilepsy using exome data. Clin Genet 2018; 93:577-587. [PMID: 28940419 DOI: 10.1111/cge.13144] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 09/12/2017] [Accepted: 09/17/2017] [Indexed: 12/14/2022]
Abstract
Epilepsies are common neurological disorders and genetic factors contribute to their pathogenesis. Copy number variations (CNVs) are increasingly recognized as an important etiology of many human diseases including epilepsy. Whole-exome sequencing (WES) is becoming a standard tool for detecting pathogenic mutations and has recently been applied to detecting CNVs. Here, we analyzed 294 families with epilepsy using WES, and focused on 168 families with no causative single nucleotide variants in known epilepsy-associated genes to further validate CNVs using 2 different CNV detection tools using WES data. We confirmed 18 pathogenic CNVs, and 2 deletions and 2 duplications at chr15q11.2 of clinically unknown significance. Of note, we were able to identify small CNVs less than 10 kb in size, which might be difficult to detect by conventional microarray. We revealed 2 cases with pathogenic CNVs that one of the 2 CNV detection tools failed to find, suggesting that using different CNV tools is recommended to increase diagnostic yield. Considering a relatively high discovery rate of CNVs (18 out of 168 families, 10.7%) and successful detection of CNV with <10 kb in size, CNV detection by WES may be able to surrogate, or at least complement, conventional microarray analysis.
Collapse
Affiliation(s)
- N Tsuchida
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Department of Stem Cell and Immune Regulation, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - M Nakashima
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Department of Biochemistry, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - M Kato
- Department of Pediatrics, Yamagata University Faculty of Medicine, Yamagata, Japan.,Department of Pediatrics, Showa University School of Medicine, Tokyo, Japan
| | - E Heyman
- Pediatric Neurology Department Pediatric Epilepsy Service, Assaf Harofeh Medical Center, Zerifin, Israel
| | - T Inui
- Department of Neurology, Miyagi Children's Hospital, Sendai, Japan
| | - K Haginoya
- Department of Neurology, Miyagi Children's Hospital, Sendai, Japan
| | - S Watanabe
- Department of Neurology, Miyagi Children's Hospital, Sendai, Japan
| | - T Chiyonobu
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - M Morimoto
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - M Ohta
- Department of Pediatrics, JA Toride General Hospital, Toride, Ibaraki, Japan
| | - A Kumakura
- Department of Pediatrics, Kitano Hospital, The Tazuke Kofukai Medical Research Institute, Osaka, Japan
| | - M Kubota
- Division of Neurology, National Center for Child Health and Development, Tokyo, Japan
| | - Y Kumagai
- Division of Neurology, Saitama Children's Medical Center, Saitama, Japan
| | - S-I Hamano
- Division of Neurology, Saitama Children's Medical Center, Saitama, Japan
| | - C M Lourenco
- Neurogenetics Unit, School of Medicine of Ribeirao Preto, University of Sao Paulo, Sao Paulo, Brazil
| | - N A Yahaya
- Hospital Raja Perempuan Zainab II, Kota Bharu, Malaysia
| | - G-S Ch'ng
- Genetic Department, Hospital Kuala Lumpur, Kuala Lumpur, Malaysia
| | - L-H Ngu
- Genetic Department, Hospital Kuala Lumpur, Kuala Lumpur, Malaysia
| | - A Fattal-Valevski
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Neurology Unit, Dana-Dwek Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - M Weisz Hubshman
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Raphael Recanati Genetics Institute, Rabin Medical Center, Petach Tikva, Israel
| | - N Orenstein
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
| | - D Marom
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Pediatrics A, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
| | - L Cohen
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
| | - H Goldberg-Stern
- Epilepsy Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
| | - Y Uchiyama
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - E Imagawa
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - T Mizuguchi
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - A Takata
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - N Miyake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - H Nakajima
- Department of Stem Cell and Immune Regulation, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - H Saitsu
- Department of Biochemistry, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - S Miyatake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Clinical Genetics Department, Yokohama City University Hospital, Yokohama, Japan
| | - N Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| |
Collapse
|
11
|
Valdès LC, Gerges J, Mizuguchi T, Affouard F. Crystallization tendencies of modelled Lennard-Jones liquids with different attractions. J Chem Phys 2018; 148:014501. [DOI: 10.1063/1.5004659] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- L.-C. Valdès
- Unité Matériaux et Transformations (UMET), UMR CNRS 8207, UFR de Physique, BAT P5, Université Lille 1, 59655 Villeneuve d’Ascq, France
| | - J. Gerges
- Unité Matériaux et Transformations (UMET), UMR CNRS 8207, UFR de Physique, BAT P5, Université Lille 1, 59655 Villeneuve d’Ascq, France
| | - T. Mizuguchi
- Unité Matériaux et Transformations (UMET), UMR CNRS 8207, UFR de Physique, BAT P5, Université Lille 1, 59655 Villeneuve d’Ascq, France
- Institute for the Promotion of University Strategy, Kyoto Institute of Technology, Kyoto 606-8585, Japan
| | - F. Affouard
- Unité Matériaux et Transformations (UMET), UMR CNRS 8207, UFR de Physique, BAT P5, Université Lille 1, 59655 Villeneuve d’Ascq, France
| |
Collapse
|
12
|
Miyake N, Ozasa S, Mabe H, Kimura S, Shiina M, Imagawa E, Miyatake S, Nakashima M, Mizuguchi T, Takata A, Ogata K, Matsumoto N. A novel missense mutation affecting the same amino acid as the recurrent PACS1 mutation in Schuurs-Hoeijmakers syndrome. Clin Genet 2017; 93:929-930. [PMID: 28975623 DOI: 10.1111/cge.13105] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 07/18/2017] [Accepted: 07/19/2017] [Indexed: 02/03/2023]
Abstract
A novel causative variant (c.608G>A, p.Arg203Gln) in PACS1.
Collapse
Affiliation(s)
- N Miyake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - S Ozasa
- Department of Pediatrics, Kumamoto University, Kumamoto, Japan
| | - H Mabe
- Department of Pediatrics, Kumamoto University, Kumamoto, Japan
| | - S Kimura
- Kumamoto City Child Development Support Center, Kumamoto, Japan
| | - M Shiina
- Department of Biochemistry, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - E Imagawa
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - S Miyatake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - M Nakashima
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - T Mizuguchi
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - A Takata
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - K Ogata
- Department of Biochemistry, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - N Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| |
Collapse
|
13
|
Tsuchida N, Nakashima M, Miyauchi A, Yoshitomi S, Kimizu T, Ganesan V, Teik KW, Ch'ng GS, Kato M, Mizuguchi T, Takata A, Miyatake S, Miyake N, Osaka H, Yamagata T, Nakajima H, Saitsu H, Matsumoto N. Novel biallelic SZT2 mutations in 3 cases of early-onset epileptic encephalopathy. Clin Genet 2017; 93:266-274. [PMID: 28556953 DOI: 10.1111/cge.13061] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Revised: 05/10/2017] [Accepted: 05/24/2017] [Indexed: 01/08/2023]
Abstract
The seizure threshold 2 (SZT2) gene encodes a large, highly conserved protein that is associated with epileptogenesis. In mice, Szt2 is abundantly expressed in the central nervous system. Recently, biallelic SZT2 mutations were found in 7 patients (from 5 families) presenting with epileptic encephalopathy with dysmorphic features and/or non-syndromic intellectual disabilities. In this study, we identified by whole-exome sequencing compound heterozygous SZT2 mutations in 3 patients with early-onset epileptic encephalopathies. Six novel SZT2 mutations were found, including 3 truncating, 1 splice site and 2 missense mutations. The splice-site mutation resulted in skipping of exon 20 and was associated with a premature stop codon. All individuals presented with seizures, severe developmental delay and intellectual disabilities with high variability. Brain MRIs revealed a characteristic thick and short corpus callosum or a persistent cavum septum pellucidum in each of the 2 cases. Interestingly, in the third case, born to consanguineous parents, had unexpected compound heterozygous missense mutations. She showed microcephaly despite the other case and previous ones presenting with macrocephaly, suggesting that SZT2 mutations might affect head size.
Collapse
Affiliation(s)
- N Tsuchida
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Department of Stem Cell and Immune Regulation, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - M Nakashima
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - A Miyauchi
- Department of Pediatrics, Jichi Medical University, Tochigi, Japan
| | - S Yoshitomi
- Department of Pediatrics, Shizuoka Institute of Epilepsy and Neurological Disorders, Shizuoka, Japan
| | - T Kimizu
- Department of Pediatrics, Shizuoka Institute of Epilepsy and Neurological Disorders, Shizuoka, Japan
| | - V Ganesan
- Department of Pediatrics, Penang Hospital, Pulau Pinang, Malaysia
| | - K W Teik
- Genetic Department, Hospital Kuala Lumpur, Kuala Lumpur, Malaysia
| | - G-S Ch'ng
- Genetic Department, Hospital Kuala Lumpur, Kuala Lumpur, Malaysia
| | - M Kato
- Department of Pediatrics, Yamagata University Faculty of Medicine, Yamagata, Japan.,Department of Pediatrics, Showa University School of Medicine, Tokyo, Japan
| | - T Mizuguchi
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - A Takata
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - S Miyatake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Clinical Genetics Department, Yokohama City University Hospital, Yokohama, Japan
| | - N Miyake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - H Osaka
- Department of Pediatrics, Jichi Medical University, Tochigi, Japan
| | - T Yamagata
- Department of Pediatrics, Jichi Medical University, Tochigi, Japan
| | - H Nakajima
- Department of Stem Cell and Immune Regulation, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - H Saitsu
- Department of Biochemistry, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - N Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| |
Collapse
|
14
|
Miyake N, Inaba M, Mizuno S, Shiina M, Imagawa E, Miyatake S, Nakashima M, Mizuguchi T, Takata A, Ogata K, Matsumoto N. A case of atypical Kabuki syndrome arising from a novel missense variant in HNRNPK. Clin Genet 2017; 92:554-555. [PMID: 28771707 DOI: 10.1111/cge.13023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 03/22/2017] [Accepted: 03/24/2017] [Indexed: 11/27/2022]
Abstract
A novel causative variant (c. 464T>C, p.Leu155Pro) in the heterogeneous nuclear ribonucleoprotein K (HNRNPK) gene.
Collapse
Affiliation(s)
- N Miyake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - M Inaba
- Department of Pediatrics, Central Hospital, Aichi Human Service Center, Kasugai, Japan
| | - S Mizuno
- Department of Pediatrics, Central Hospital, Aichi Human Service Center, Kasugai, Japan
| | - M Shiina
- Department of Biochemistry, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - E Imagawa
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - S Miyatake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - M Nakashima
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - T Mizuguchi
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - A Takata
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - K Ogata
- Department of Biochemistry, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - N Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| |
Collapse
|
15
|
Kobayashi K, Mizuguchi T, Hattori Y, Ohara N, Ninomiya R, Iida M, Ooe H, Yamazaki Y, Takata M, Tamamura H, Akaji K. Effects of replacement and addition of an amino acid contained in a cyclic peptide corresponding to a β-hairpin loop sequence of human EGF receptor. J Pept Sci 2017; 23:581-586. [PMID: 28378383 DOI: 10.1002/psc.3004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 03/15/2017] [Accepted: 03/16/2017] [Indexed: 01/20/2023]
Abstract
Effects of replacement and addition of an amino acid in a cyclic decapeptide 1 (cyclic-CYNPTTYQMC) for inhibitory activity to dimerization of human epidermal growth factor receptor (EGFR) were examined. By alanine scanning of 1 corresponding to the arm structure (residues 246-254) of a β-hairpin loop sequence (residues 242-259) of EGFR, it was confirmed that replacement of any amino acid in the loop structure lowered the dimerization inhibitory activity of 1. Among the residues examined, Tyr at position 246 and Thr at 250 were found to be crucial for dimer formation. Addition of an amino acid to the N-terminus of 1 also affected the dimerization inhibitory activity. Addition of an amino acid containing a moderately hydrophilic side-chain increased the inhibitory activity. In contrast, an intramolecular hydrogen bond of 1 is not thought to be crucial for holding the dimer structure on the basis of the dimerization inhibitory activities of N-methylated analogues of 1. These results will be useful for the design and evaluation of a potent dimerization inhibitor as an anti-proliferation agent. Copyright © 2017 European Peptide Society and John Wiley & Sons, Ltd.
Collapse
Affiliation(s)
- Kazuya Kobayashi
- Kyoto Pharmaceutical University, Yamashina-ku, Kyoto, 607-8412, Japan
| | - Takaaki Mizuguchi
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Yasunao Hattori
- Kyoto Pharmaceutical University, Yamashina-ku, Kyoto, 607-8412, Japan
| | - Naho Ohara
- Kyoto Pharmaceutical University, Yamashina-ku, Kyoto, 607-8412, Japan
| | | | - Mika Iida
- Kyoto Pharmaceutical University, Yamashina-ku, Kyoto, 607-8412, Japan
| | - Honami Ooe
- Kyoto Pharmaceutical University, Yamashina-ku, Kyoto, 607-8412, Japan
| | - Yukako Yamazaki
- Kyoto Pharmaceutical University, Yamashina-ku, Kyoto, 607-8412, Japan
| | - Minami Takata
- Kyoto Pharmaceutical University, Yamashina-ku, Kyoto, 607-8412, Japan
| | - Hirokazu Tamamura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Kenichi Akaji
- Kyoto Pharmaceutical University, Yamashina-ku, Kyoto, 607-8412, Japan
| |
Collapse
|
16
|
Mizuguchi T, Ohashi N, Matsumoto D, Hashimoto C, Nomura W, Yamamoto N, Murakami T, Tamamura H. Development of anti-HIV peptides based on a viral capsid protein. Biopolymers 2017; 108. [PMID: 27428649 DOI: 10.1002/bip.22920] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 07/11/2016] [Accepted: 07/14/2016] [Indexed: 01/01/2023]
Abstract
Peptide inhibitors with cell permeability targeting an HIV-1 capsid (CA) protein might make therapeutic by regulating HIV-1 replication. Overlapping fragment peptide libraries covering the whole sequence of an HIV-1 CA protein have been synthesized with the addition of an octa-arginyl moiety to increase their cell permeability. Amongst these peptides, several compounds which inhibit the HIV-1 replication cycle have been found. Conjugation of cell-penetrating functions such as an octa-arginyl group to individual peptides in combination with the addition of chloroquine in cell-based anti-HIV assays was previously proven to be a useful assay method with which to search for active peptides. Anti-HIV assays have been performed in the presence or absence of chloroquine and found that most of compounds have higher anti-HIV activity in the presence, rather than in the absence of chloroquine. Some potent seeds as anti-HIV agents might naturally lie hidden in CA proteins, and could become useful leads to HIV inhibitors.
Collapse
Affiliation(s)
- Takaaki Mizuguchi
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Nami Ohashi
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Daichi Matsumoto
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Chie Hashimoto
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Wataru Nomura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Naoki Yamamoto
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
| | - Tsutomu Murakami
- AIDS Research Center, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Hirokazu Tamamura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo, 101-0062, Japan
| |
Collapse
|
17
|
Nomura W, Mizuguchi T, Tamamura H. Multimerized HIV-gp41-derived peptides as fusion inhibitors and vaccines. Biopolymers 2017; 106:622-8. [PMID: 26583370 DOI: 10.1002/bip.22782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Revised: 10/28/2015] [Accepted: 11/02/2015] [Indexed: 11/11/2022]
Abstract
To date, several antigens based on the amino-terminal leucine/isoleucine heptad repeat (NHR) region of an HIV-1 envelope protein gp41 and fusion inhibitors based on the carboxy-terminal leucine/isoleucine heptad repeat (CHR) region of gp41 have been reported. We have developed a synthetic antigen targeting the membrane-fusion mechanism of HIV-1. This uses a template designed with C3-symmetric linkers and mimics the trimeric form of the NHR-derived peptide N36. The antiserum obtained by immunization of the N36 trimeric antigen binds preferentially to the N36 trimer and blocks HIV-1 infection effectively, compared with the antiserum obtained by immunization of the N36 monomer. Using another template designed with different C3-symmetric linkers, we have also developed a synthetic peptide mimicking the trimeric form of the CHR-derived peptide C34, with ∼100 times the inhibitory activity against the HIV-1 fusion mechanism than that of the monomer C34 peptide. A dimeric derivative of C34 has potent inhibitory activity at almost the same levels as this C34 trimer mimic, suggesting that presence of a dimeric form of C34 is structurally critical for fusion inhibitors. As examples of rising mid-size drugs, this review describes an effective strategy for the design of HIV vaccines and fusion inhibitors based on a relationship with the native structure of proteins involved in HIV fusion mechanisms. © 2015 Wiley Periodicals, Inc. Biopolymers (Pept Sci) 106: 622-628, 2016.
Collapse
Affiliation(s)
- Wataru Nomura
- Department of Medicinal Chemistry, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-Ku, Tokyo 101-0062, Japan
| | - Takaaki Mizuguchi
- Department of Medicinal Chemistry, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-Ku, Tokyo 101-0062, Japan
| | - Hirokazu Tamamura
- Department of Medicinal Chemistry, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-Ku, Tokyo 101-0062, Japan
| |
Collapse
|
18
|
Toyama K, Mizuguchi T, Nomura W, Tamamura H. Functional evaluation of fluorescein-labeled derivatives of a peptide inhibitor of the EGF receptor dimerization. Bioorg Med Chem 2016; 24:3406-12. [PMID: 27283787 DOI: 10.1016/j.bmc.2016.05.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 05/15/2016] [Accepted: 05/17/2016] [Indexed: 12/22/2022]
Abstract
A cyclic decapeptide (1, ), which acts on the extracellular region of the EGF receptor, preventing it from dimerizing, has been developed. Peptide 2, which was labeled with fluorescein at the N-terminus of peptide 1, was synthesized based on structure-activity relationship studies. Peptide 2 essentially retained the inhibitory activity of peptide 1 against the receptor autophosphorylation. Confocal microscopy studies revealed that in carcinoma cells, the fluorescence of peptide 2 was localized inside some vesicles. Treatment of intact cells by peptide 1 in combination with peptide 2 decreased the fluorescence intensity significantly compared to treatment with only peptide 2. These results indicate that peptide 2 competes with peptide 1 for binding to the cellular surface. Six derivatives of peptide 2, in which constituent amino acids, with the exception of two cysteines and proline were randomized, were synthesized and used to treat the cells. Peptides 6 and 9 showed the highest fluorescence intensity in cells. From the results of the EGF receptor autophosphorylation assay, these two derivatives were proven to have higher inhibitory activity than peptide 2, which would therefore be a useful delivery peptide and fluorescent probe to find new inhibitors against the EGF receptor. Peptides 6 and 9 are promising leads for EGF receptor inhibitors.
Collapse
Affiliation(s)
- Kei Toyama
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Takaaki Mizuguchi
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Wataru Nomura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Hirokazu Tamamura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan.
| |
Collapse
|
19
|
Ohashi N, Harada S, Mizuguchi T, Irahara Y, Yamada Y, Kotani M, Nomura W, Matsushita S, Yoshimura K, Tamamura H. Small-Molecule CD4 Mimics Containing Mono-cyclohexyl Moieties as HIV Entry Inhibitors. ChemMedChem 2016; 11:940-6. [PMID: 26891461 DOI: 10.1002/cmdc.201500590] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Indexed: 12/25/2022]
Abstract
CD4 mimics are small molecules that inhibit the protein-protein interaction between gp120 and CD4, which is a key interaction for the entry of human immunodeficiency virus (HIV) into host immune cells. In the present study, mono-cyclohexyl-type CD4 mimics were designed to form hydrophobic and electrostatic interactions with Val430 and Asp368 located in the entrance of the Phe43 cavity of gp120, the interaction site of CD4. YIR-329, a novel 1-azaspiro[5.5]undecane derivative with a cyclohexyl ring attached to the piperidine ring, exhibited only slightly weaker anti-HIV activity than a previously described lead HAR-171, and modeling results indicated the formation of advantageous interactions by the para-chlorophenyl moiety of YIR-329. To introduce an electrostatic interaction with Asp368, derivatives with a guanidino group on the piperidine nitrogen atom were synthesized. Mono-cyclohexyl-type CD4 mimics with a guanidino group, such as YIR-819 (N(1) -(4-chlorophenyl)-N(2) -(1-(2-(N-(amidino)glycinamide)ethyl)-2-cyclohexylpiperidin-4-yl)oxalamide) and YIR-821 (1-(2-(5-guanidinovaleramide)ethyl derivative of YIR-819), were identified that exhibit approximately fivefold more potent anti-HIV activity than YIR-329. In combination with a neutralizing antibody, their anti-HIV activities were augmenting. Modeling results suggest that these compounds interact effectively with Val430 and either Asp368 or Asp474 in the gp120 Phe43 cavity. YIR-819 and YIR-821 represent useful lead compounds for the further development of HIV-1 entry inhibitors and could potentially be useful for co-administration with neutralizing antibodies for the treatment of HIV infection and AIDS.
Collapse
Affiliation(s)
- Nami Ohashi
- Institute of Biomaterials & Bioengineering, Tokyo Medical & Dental University, 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Shigeyoshi Harada
- AIDS Research Center, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Takaaki Mizuguchi
- Institute of Biomaterials & Bioengineering, Tokyo Medical & Dental University, 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Yu Irahara
- Institute of Biomaterials & Bioengineering, Tokyo Medical & Dental University, 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Yuko Yamada
- Institute of Biomaterials & Bioengineering, Tokyo Medical & Dental University, 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo, 101-0062, Japan.,Pharmaceutical Department, Keio University Hospital, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Misato Kotani
- Institute of Biomaterials & Bioengineering, Tokyo Medical & Dental University, 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Wataru Nomura
- Institute of Biomaterials & Bioengineering, Tokyo Medical & Dental University, 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Shuzo Matsushita
- Center for AIDS Research, Kumamoto University, Kumamoto, 860-0811, Japan
| | - Kazuhisa Yoshimura
- AIDS Research Center, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan.
| | - Hirokazu Tamamura
- Institute of Biomaterials & Bioengineering, Tokyo Medical & Dental University, 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo, 101-0062, Japan.
| |
Collapse
|
20
|
Nomura W, Aikawa H, Taketomi S, Tanabe M, Mizuguchi T, Tamamura H. Exploration of labeling by near infrared dyes of the polyproline linker for bivalent-type CXCR4 ligands. Bioorg Med Chem 2015; 23:6967-73. [PMID: 26453409 DOI: 10.1016/j.bmc.2015.09.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 09/24/2015] [Accepted: 09/25/2015] [Indexed: 11/15/2022]
Abstract
We have previously used poly-L-proline linkers for the development of bivalent-type ligands for the chemokine receptor, CXCR4. The bivalent ligands with optimum linkers showed specific binding to CXCR4, suggesting the existence of CXCR4 possibly as a dimer on the cell membrane, and enabled definition of the amount of CXCR4 expressed. This paper reports the synthesis by a copper-catalyzed azide-alkyne cycloaddition reaction as the key reaction, of bivalent CXCR4 ligands with near infrared (NIR) dyes at the terminus or the center of the poly-L-proline linker. Some of the NIR-labeled ligands, which would be valuable probes useful in studies of the behavior of cells expressing CXCR4, have been obtained. The information concerning the effects of the labeling positions of NIR dyes on their binding properties is useful for the design of modified bivalent-type CXCR4 ligands.
Collapse
Affiliation(s)
- Wataru Nomura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Haruo Aikawa
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Shohei Taketomi
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Miho Tanabe
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Takaaki Mizuguchi
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Hirokazu Tamamura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| |
Collapse
|
21
|
Mizuguchi T, Ohashi N, Nomura W, Komoriya M, Hashimoto C, Yamamoto N, Murakami T, Tamamura H. Anti-HIV screening for cell-penetrating peptides using chloroquine and identification of anti-HIV peptides derived from matrix proteins. Bioorg Med Chem 2015; 23:4423-4427. [PMID: 26094944 DOI: 10.1016/j.bmc.2015.06.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Revised: 06/06/2015] [Accepted: 06/08/2015] [Indexed: 11/17/2022]
Abstract
Previously, compounds which inhibit the HIV-1 replication cycle were found in overlapping peptide libraries covering the whole sequence of an HIV-1 matrix (MA) protein constructed with the addition of an octa-arginyl group. The two top lead compounds are sequential fragments MA-8L and MA-9L. In the present study, the addition of chloroquine in cell-based anti-HIV assays was proven to be an efficient method with which to find anti-HIV compounds among several peptides conjugated by cell-penetrating signals such as an octa-arginyl group: the conjugation of an octa-arginyl group to individual peptides contained in whole proteins in combination with the addition of chloroquine in cells is a useful assay method to search active peptides. To find more potent fragment peptides, individual peptides between MA-8L and MA-9L, having the same peptide chain length but with sequences shifted by one amino acid residue, were synthesized in this paper and their anti-HIV activity was evaluated with an anti-HIV assay using chloroquine. As a result, the peptides in the C-terminal side of the series, which are relatively close to MA-9L, showed more potent inhibitory activity against both X4-HIV-1 and R5-HIV-1 than the peptides in the N-terminal side.
Collapse
Affiliation(s)
- Takaaki Mizuguchi
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Nami Ohashi
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Wataru Nomura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Mao Komoriya
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Chie Hashimoto
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Naoki Yamamoto
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
| | - Tsutomu Murakami
- AIDS Research Center, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo 162-8640, Japan.
| | - Hirokazu Tamamura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan.
| |
Collapse
|
22
|
Nomura W, Koseki T, Ohashi N, Mizuguchi T, Tamamura H. Trivalent ligands for CXCR4 bearing polyproline linkers show specific recognition for cells with increased CXCR4 expression. Org Biomol Chem 2015; 13:8734-9. [DOI: 10.1039/c5ob00891c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The trivalent ligand with rigid linkers designed for exploration of GPCR multimerization shows specific recognition for overexpressed CXCR4.
Collapse
Affiliation(s)
- Wataru Nomura
- Institute of Biomaterials and Bioengineering
- Tokyo Medical and Dental University
- Tokyo 101-0062
- Japan
| | - Taisuke Koseki
- Institute of Biomaterials and Bioengineering
- Tokyo Medical and Dental University
- Tokyo 101-0062
- Japan
| | - Nami Ohashi
- Institute of Biomaterials and Bioengineering
- Tokyo Medical and Dental University
- Tokyo 101-0062
- Japan
| | - Takaaki Mizuguchi
- Institute of Biomaterials and Bioengineering
- Tokyo Medical and Dental University
- Tokyo 101-0062
- Japan
| | - Hirokazu Tamamura
- Institute of Biomaterials and Bioengineering
- Tokyo Medical and Dental University
- Tokyo 101-0062
- Japan
| |
Collapse
|
23
|
Mizuguchi T, Kawamoto M, Ota S, Ishii M, Meguro M, Okita K, Furuhata T, Nobuoka T, Kimura Y, Hirata K. Prognostic Impact of Aldehyde Dehydrogenase 1 Expression in Viral- and Alcohol-Unrelated Hepatocellular Carcinoma Patients after Initial Hepatectomy. J Surg Res 2014. [DOI: 10.1016/j.jss.2013.11.876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
24
|
Saito K, Nakato M, Mizuguchi T, Wada S, Uchimura H, Kataoka H, Yokoyama S, Hirota H, Kiso Y. Application of plug-plug technique to ACE experiments for discovery of peptides binding to a larger target protein: A model study of calmodulin-binding fragments selected from a digested mixture of reduced BSA. Electrophoresis 2014; 35:846-54. [DOI: 10.1002/elps.201300339] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 10/28/2013] [Accepted: 10/31/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Kazuki Saito
- Laboratory of Proteomic Sciences; 21st Century COE Program; Kyoto Pharmaceutical University; Kyoto Japan
- Department of Integrated Biosciences; Graduate School of Frontier Sciences; University of Tokyo; Kashiwa Chiba Japan
- Laboratory of Next Generation Drug Development; Graduate School of Frontier Sciences; University of Tokyo; Kashiwa Chiba Japan
- Protein Research Group; RIKEN Genomic Sciences Center; Tsurumi Yokohama Japan
| | - Mamiko Nakato
- Department of Medicinal Chemistry; Center for Frontier Research in Medicinal Science; Kyoto Pharmaceutical University; Yamashina-ku Kyoto Japan
| | - Takaaki Mizuguchi
- Department of Medicinal Chemistry; Center for Frontier Research in Medicinal Science; Kyoto Pharmaceutical University; Yamashina-ku Kyoto Japan
| | - Shinji Wada
- Department of Medicinal Chemistry; Center for Frontier Research in Medicinal Science; Kyoto Pharmaceutical University; Yamashina-ku Kyoto Japan
| | - Hiromasa Uchimura
- Laboratory of Proteomic Sciences; 21st Century COE Program; Kyoto Pharmaceutical University; Kyoto Japan
| | - Hiroshi Kataoka
- Department of Integrated Biosciences; Graduate School of Frontier Sciences; University of Tokyo; Kashiwa Chiba Japan
| | - Shigeyuki Yokoyama
- Protein Research Group; RIKEN Genomic Sciences Center; Tsurumi Yokohama Japan
| | - Hiroshi Hirota
- Protein Research Group; RIKEN Genomic Sciences Center; Tsurumi Yokohama Japan
| | - Yoshiaki Kiso
- Department of Medicinal Chemistry; Center for Frontier Research in Medicinal Science; Kyoto Pharmaceutical University; Yamashina-ku Kyoto Japan
| |
Collapse
|
25
|
Tatsumi H, Masuda Y, Imaizumi H, Yoshida S, Goto K, Yama N, Mizuguchi T, Hirata K. Asialoglycoprotein receptor scintigraphy with 99mTc-galactosyl human serum albumin (99mTc-GSA) as an early predictor of survival in acute liver failure. Anaesth Intensive Care 2013; 41:523-8. [PMID: 23808513 DOI: 10.1177/0310057x1304100414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
This study evaluated the usefulness of asialoglycoprotein receptor scintigraphy with 99mTc-galactosyl human serum albumin (99mTc-GSA scintigraphy) as an early predictor for prognosis of acute liver failure. Forty-eight patients with acute liver failure and without a past history of chronic liver disease were enrolled. Patients were divided into survival and non-survival groups by 28-day mortality. 99mTc-GSA scintigraphy to detect uptake ratio of the heart at 15 minutes to that at three minutes (HH15) and uptake ratio of the liver at 15 minutes to the liver plus the heart at 15 minutes (LHL15), and measurements of serum total bilirubin, hepatocyte growth factor and prothrombin time were performed immediately after the diagnosis of acute liver failure. Areas under the receiver operating characteristic curves were used to compare the prognostic ability of total bilirubin, hepatocyte growth factor, prothrombin time, HH15 ratio, LHL15 ratio and the model for end-stage liver disease score. Clinical characteristics of patients in the survival group (n=20) and in the non-survival group (n=28) were not significantly different. HH15 and LHL15 uptake ratios in the survival group were 0.670 and 0.875, and they were significantly lower and higher than those in the non-survival group, respectively. All patients with LHL15 <0.760 died, and the area under the receiver operating characteristic curve for LHL15 were significantly larger than the areas under the receiver operating characteristic curves of serum variables and model for end-stage liver disease score. In summary, in patients with acute liver failure without chronic liver disease, HH15 and LHL15 of 99mTc-GSA scintigraphy are more useful variables in predicting prognosis than serum variables and model for end-stage liver disease score.
Collapse
Affiliation(s)
- H Tatsumi
- Department of Intensive Care Medicine, Sapporo Medical University, Sapporo, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Terashita D, Sawada T, Shiotani H, Nagasawa Y, Mizoguchi T, Mizuguchi T, Okamoto H, Kim S, Koide M, Takarada A. Ameliorating effects of miglitol on postprandial hyperglycemia and triglyceride/HDL ratio are associated with beneficial impact on atherosclerosis in diabetic patients with coronary artery disease. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p2271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
27
|
Mizuguchi T, Ohara N, Iida M, Ninomiya R, Wada S, Kiso Y, Saito K, Akaji K. Evaluation of dimerization-inhibitory activities of cyclic peptides containing a β-hairpin loop sequence of the EGF receptor. Bioorg Med Chem 2012; 20:5730-7. [PMID: 22959765 DOI: 10.1016/j.bmc.2012.08.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 08/09/2012] [Accepted: 08/09/2012] [Indexed: 10/28/2022]
Abstract
Structure-activity relationships of cyclic peptides mimicking the β-hairpin structure of the 'dimerization arm' at residues 242-259 of the EGF receptor are examined. Cyclic peptides containing the arm head of the β-hairpin loop showed inhibitory activity toward the EGF receptor's dimerization. Cyclic peptides containing a Retro-Inverso sequence of the dimerization arm showed clear inhibitory effects on the dimerization in vitro and efficiently suppressed the proliferation of A431 cells, which abundantly express the EGF receptor on their surface. The effects at a specific hydrophobic site of the loop structure were expected to enhance the interactions with the receptor.
Collapse
Affiliation(s)
- Takaaki Mizuguchi
- Department of Medicinal Chemistry, Center for Frontier Research in Medicinal Science, Kyoto Pharmaceutical University, Kyoto 607-8412, Japan
| | | | | | | | | | | | | | | |
Collapse
|
28
|
Hirata K, Kimura Y, Mizuguchi T, Mimamura M, Meguro M, Nakamura Y, Ito T, Yamaguchi H, Kyuno D. Surgical management of intraductal papillary mucinous neoplasms. Rozhl Chir 2012; 91:340-345. [PMID: 23106088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Affiliation(s)
- K Hirata
- Department of Surgical Oncology and Gastroenterological Surgery Sapporo Medical Unviversity School of Medicine.
| | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Nakamura Y, Mizuguchi T, Ooe H, Kawamoto M, Meguro M, Ota S, Mitaka T, Hirata K. Hepatic Progenitor Cell Transplantation for Improving Survival After Liver Resection in a Rat Non-alcoholic Steatocirrhotic Liver Model. J Surg Res 2012. [DOI: 10.1016/j.jss.2011.11.784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
30
|
Mizuguchi T, Kawamoto M, Nakamura Y, Meguro M, Ota S, Nishidate T, Okita K, Furuhata T, Hirata K. Extracorporeal Hepatic Inflow Control Method for Pure Laparoscopic Liver Resection. J Surg Res 2012. [DOI: 10.1016/j.jss.2011.11.681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
31
|
Mizuguchi T, Uchimura H, Kataoka H, Akaji K, Kiso Y, Saito K. Intact-cell-based surface plasmon resonance measurements for ligand affinity evaluation of a membrane receptor. Anal Biochem 2011; 420:185-7. [PMID: 22005322 DOI: 10.1016/j.ab.2011.09.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 08/22/2011] [Accepted: 09/22/2011] [Indexed: 11/17/2022]
Abstract
Toward future applications to the discovery of drugs against membrane receptors on pathological cells, an intact-cell-based surface plasmon resonance (SPR) methodology has been developed. The injection of a suspension of epidermal carcinoma A431 cells (5×10(7)cells/ml), as an analyte, generated clear SPR responses to epidermal growth factor (EGF) immobilized on the sensor chip. Because the responses were competitively reduced by the free ligand EGF, added to the analyte cell suspension, they certainly reflect the specific interaction of the immobilized EGF with the extracellular region of its receptor, which is highly expressed on the surface of the A431 cells.
Collapse
Affiliation(s)
- Takaaki Mizuguchi
- Department of Medicinal Chemistry, Center for Frontier Research in Medicinal Science, Kyoto Pharmaceutical University, Kyoto 607-8412, Japan
| | | | | | | | | | | |
Collapse
|
32
|
Uchimura H, Kim Y, Mizuguchi T, Kiso Y, Saito K. Quantitative evaluation of refolding conditions for a disulfide-bond-containing protein using a concise ¹⁸O-labeling technique. Protein Sci 2011; 20:1090-6. [PMID: 21500299 DOI: 10.1002/pro.637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Revised: 03/28/2011] [Accepted: 03/29/2011] [Indexed: 11/07/2022]
Abstract
A concise method was developed for quantifying native disulfide-bond formation in proteins using isotopically labeled internal standards, which were easily prepared with proteolytic ¹⁸O-labeling. As the method has much higher throughput to estimate the amounts of fragments possessing native disulfide arrangements by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) than the conventional high performance liquid chromatography (HPLC) analyses, it allows many different experimental conditions to be assessed in a short time. The method was applied to refolding experiments of a recombinant neuregulin 1-β1 EGF-like motif (NRG1-β1), and the optimum conditions for preparing native NRG1-β1 were obtained by quantitative comparisons. Protein disulfide isomerase (PDI) was most effective at the reduced/oxidized glutathione ratio of 2:1 for refolding the denatured sample NRG1-β1 with the native disulfide bonds.
Collapse
Affiliation(s)
- Hiromasa Uchimura
- Laboratory of Proteomic Sciences, 21st Century COE Program, Kyoto Pharmaceutical University, Kyoto 607-8412, Japan
| | | | | | | | | |
Collapse
|
33
|
Saito K, Yasuo I, Uchimura H, Koide-Yoshida S, Mizuguchi T, Kiso Y. Verification of protein disulfide bond arrangement by in-gel tryptic digestion under entirely neutral pH conditions. Proteomics 2010; 10:1505-9. [DOI: 10.1002/pmic.200900056] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
34
|
Kasuga K, Shimohata T, Nishimura A, Shiga A, Mizuguchi T, Tokunaga J, Ohno T, Miyashita A, Kuwano R, Matsumoto N, Onodera O, Nishizawa M, Ikeuchi T. Identification of independent APP locus duplication in Japanese patients with early-onset Alzheimer disease. J Neurol Neurosurg Psychiatry 2009; 80:1050-2. [PMID: 19684239 DOI: 10.1136/jnnp.2008.161703] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND The occurrence of duplications of the amyloid precursor protein gene (APP) has been described in European families with early-onset familial Alzheimer disease (EO-FAD) and cerebral amyloid angiopathy. However, the contribution of APP duplication to the development of AD in other ethnic populations remains undetermined. METHODS The occurrence of APP duplication in probands from 25 families with FAD and 11 sporadic EO-AD cases in the Japanese population was examined by quantitative PCR and microarray-based comparative genomic hybridisation analyses. APP expression level was determined by real-time quantitative reverse-transcription (RT) PCR analysis using mRNA extracted from the peripheral blood of the patients. RESULTS We identified APP locus duplications in two unrelated EO-FAD families. The duplicated genomic regions in two patients of these families differed from each other. No APP duplication was found in the late-onset FAD families or sporadic EO-AD patients. The patients with APP duplication developed insidious memory disturbance in their fifties without intracerebral haemorrhage and epilepsy. Quantitative RT-PCR analysis showed the increased APP mRNA expression levels in these patients compared with those in age- and sex-matched controls. CONCLUSIONS Our results suggest that APP duplication should be considered in patients with EO-FAD in various ethnic groups, and that increased APP mRNA expression level owing to APP duplication contributes to AD development.
Collapse
Affiliation(s)
- K Kasuga
- Department of Molecular Neuroscience, Bioresource Science Branch, Center for Bioresources, Brain Research Institute, Niigata University, Niigata, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Wang H, Kakizawa T, Taniguchi A, Mizuguchi T, Kimura T, Kiso Y. Synthesis of amyloid β peptide 1–42 (E22Δ) click peptide: pH-triggered in situ production of its native form. Bioorg Med Chem 2009; 17:4881-7. [DOI: 10.1016/j.bmc.2009.06.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 06/05/2009] [Accepted: 06/11/2009] [Indexed: 02/04/2023]
|
36
|
Mizuguchi T, Uchimura H, Kakizawa T, Kimura T, Yokoyama S, Kiso Y, Saito K. Inhibitory effect of a dimerization-arm-mimetic peptide on EGF receptor activation. Bioorg Med Chem Lett 2009; 19:3279-82. [PMID: 19419869 DOI: 10.1016/j.bmcl.2009.04.080] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Revised: 04/15/2009] [Accepted: 04/20/2009] [Indexed: 11/28/2022]
Abstract
A cyclic decapeptide was chemically synthesized that mimics the loop structure of a beta-hairpin arm of the EGF receptor, which is highly involved in receptor dimerization upon activation by ligand binding. This peptide was revealed to reduce dimer formation of the receptor in a detergent-solubilized extract of epidermoid carcinoma A431 cells and to inhibit receptor autophosphorylation at less than 10 microM in the intact cells.
Collapse
Affiliation(s)
- Takaaki Mizuguchi
- Department of Medicinal Chemistry, Center for Frontier Research in Medicinal Science and 21st Century COE Program, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8412, Japan
| | | | | | | | | | | | | |
Collapse
|
37
|
Mizuguchi T, Hirata K, Meguro M, Nagayama M, Kimura Y, Furuhata T, Nobuoka T, Yamaguchi K. QS476. Evaluation of Anti-Thrombin III and Hepatocyte Growth Factor Level to Predict Postoperative Complication and Disease-Free Survival in the Initial Liver Resection for Viral HCC Patients. J Surg Res 2009. [DOI: 10.1016/j.jss.2008.11.791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
38
|
|
39
|
Mochizuki J, Saitsu H, Mizuguchi T, Nishimura A, Visser R, Kurotaki N, Miyake N, Unno N, Matsumoto N. Alu-related 5q35 microdeletions in Sotos syndrome. Clin Genet 2008; 74:384-91. [DOI: 10.1111/j.1399-0004.2008.01032.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
40
|
Mizuguchi T, Odagaki T, Umezaki M, Koumyou T, Matsui J, Tokuyama M, Oppenheim I, Nishiyama H. Glass Transition in a Spherical Monatomic Liquid. ACTA ACUST UNITED AC 2008. [DOI: 10.1063/1.2897793] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
|
41
|
Nobuoka T, Mizuguchi T, Oshima H, Shibata T, Kimura Y, Mitaka T, Katsuramaki T, Hirata K. Portal blood flow regulates volume recovery of the rat liver after partial hepatectomy: molecular evaluation. Eur Surg Res 2006; 38:522-32. [PMID: 17047332 DOI: 10.1159/000096292] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2006] [Accepted: 08/02/2006] [Indexed: 12/13/2022]
Abstract
BACKGROUND/AIM Liver regeneration is a finely tuned process that is closely regulated by multiple cell cycle steps. Although the portal blood flow affects liver regeneration, the molecular mechanism by which the blood flow regulates gene expression and liver function is largely unknown. The aim of this study was to investigate the molecular effect of portal blood flow on hepatocyte proliferation and gene regulation during liver regeneration. MATERIALS AND METHODS We developed a simple surgical rat model to investigate the relation between portal blood flow and liver regeneration by partially ligating the portal trunk with 8-0 Proline sutures under microscopy to reduce the blood flow by 40%. We investigated recovery of liver volume, DNA synthesis, and gene expression associated with cell cycle regulators, comparing partially hepatectomized (PH) rats without (PH group; n = 30) and with partial portal ligation (PHPL group; n = 30) for 7 days after the operation. RESULTS The hepatic tissue blood flow and the recovery ratio between liver weight and body weight in the PHPL group were significantly lower than in the PH group after hepatectomy. The peak 5-bromo-2'-deoxyuridine labeling index in the PHPL group was delayed and weak compared with the PH group. The expression of CT-1 and cyclin D, E, and B mRNAs indicated that the liver regeneration in the PHPL group was delayed and weak. In addition, there was reciprocal expression of C/EBPalpha and C/EBPbeta mRNAs, an observation supported by their nuclear protein levels. Furthermore, the cytochrome P-450 protein level in the PHPL group was higher than that in the PH group 1 day after hepatectomy. CONCLUSION The portal blood flow regulates the activity of liver regeneration and the gene expression associated with cell cycle regulators, while the functions are maintained.
Collapse
Affiliation(s)
- T Nobuoka
- Department of Surgery I, Sapporo Medical University Hospital, Sapporo, Japan
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Abstract
Acute fatty liver of pregnancy complicated with anterior pituitary insufficiency in a 24-year-old nullipara woman who presented fever and progressing liver damage after the delivery by Cesarean section is described. The liver biopsy revealed severe fatty changes with microvesicular fat drops in the hepatocytes. Serum growth hormone and adrenocorticotropic hormone levels were low, and did not respond to the stimulation. The daily urinary excretion of 17-hydroxycorticosteroid was also low. Acute fatty liver of pregnancy and antehypophyseal insufficiency were diagnosed. Secondary adrenal failure was also suspected. The co-existing hypercoagulable state could cause an ischemic attack on the pituitary gland.
Collapse
Affiliation(s)
- T Yamauchi
- First Department of Internal Medicine, Fukui Medical University
| | | | | | | | | | | |
Collapse
|
43
|
Kohyama K, Sakai T, Azuma T, Mizuguchi T, Kimura I. Pressure distribution measurement in biting surimi gels with molars using a multiple-point sheet sensor. Biosci Biotechnol Biochem 2001; 65:2597-603. [PMID: 11826953 DOI: 10.1271/bbb.65.2597] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The bite force of three surimi gels with molars was measured in the mouth using a multiple-point sheet sensor. A peak force appeared at the breaking point of each sample, and then the force increased again, accompanied by a decrease in the opening between the upper and lower teeth. Low values in the peak force, pressure, and time at the first peak, the time at which the maximum contact area was engaged, impulse, and slope of bite curve were observed in samples with low breaking force and low breaking deformation found by the mechanical measurement of gel strength, and with less toughness in the sensory assessment. The duration of the bite force, the second peak time, and active bite pressure at the second peak did not change with a change in the surimi texture. The active pressure at the breaking point of each gel was affected by gel strength, while that at the second peak was independent of the gel strength.
Collapse
Affiliation(s)
- K Kohyama
- National Food Research Institute, Tsukuba, Ibaraki, Japan.
| | | | | | | | | |
Collapse
|
44
|
Mizuguchi T, Hui T, Palm K, Sugiyama N, Mitaka T, Demetriou AA, Rozga J. Enhanced proliferation and differentiation of rat hepatocytes cultured with bone marrow stromal cells. J Cell Physiol 2001; 189:106-19. [PMID: 11573209 DOI: 10.1002/jcp.1136] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Liver transplantation is the only clinically effective method of treating acute liver failure. However, wider application of this therapeutic modality is restricted primarily by shortage of donor organs. In the search for alternative methods of liver replacement therapy, investigators have focused on transplantation of normal allogeneic hepatocytes and on the development of liver support systems utilizing isolated hepatocytes. Since all human livers suitable for cell harvest are being used for transplantation, hepatocyte therapy using human tissue would require growing of cells in vitro. Unfortunately, although hepatocytes have tremendous capacity to proliferate in vivo, their ability to grow in culture is severely limited. Stromal cells from bone marrow and other blood-forming organs have been found to support hematopoiesis. In this paper, we show that bone marrow-derived stromal cells (BMSCs) enhance proliferation and support differentiation of rat hepatocytes in culture. Further, we demonstrate that in hepatocyte/BMSC co-cultures, clonal expansion of small hepatocytes (SH) is increased. Using semipermeable membrane cultures, we established that direct cell-cell contact is necessary for stimulation of cell proliferation. We also show that BMSCs which are in direct contact with hepatocytes and SH colonies express Jagged1. This suggests a potential role for Notch signaling in the observed effects. Finally, we present evidence that the expression and activity of liver specific transcription factors, CCAAT/enhancer binding proteins and liver specific key enzymes such as tryptophan 2,3-dioxygenase, are improved in hepatocyte/BMSC co-cultures. In conclusion, results of this study indicate that BMSCs could facilitate proliferation and differentiation of primary rat hepatocytes and their progenitors (SH) in vitro.
Collapse
Affiliation(s)
- T Mizuguchi
- Liver Support Research Laboratory, Cedars-Sinai Medical Center, UCLA School of Medicine, Los Angeles, California 90048, USA.
| | | | | | | | | | | | | |
Collapse
|
45
|
Abstract
BACKGROUND Earlier we described a model of fulminant hepatic failure (FHF) in the rat where partial hepatectomy is combined with induction of right liver lobe necrosis. In FHF rats, lack of hepatocyte proliferation was associated with delayed expression of HGF and HGF receptor c-met. Since the c-met promoter region has Sp1 binding sites, we decided to examine whether in FHF rats down-regulation of c-met is associated with decreased Sp1 function and whether changes in blood HGF, IL-6, and TGFbeta1 levels might be responsible for these effects. MATERIALS AND METHODS Induction of FHF, partial (2/3) hepatectomy (PH), and sham hepatectomy (SH) was performed in adult Sprague-Dawley rats. The levels of c-met mRNA and Sp1 DNA binding activity were studied in rat liver remnants at different time points after surgery. Blood levels of HGF, IL-6, and TGFbeta1 were also measured in these rats. Additionally, the effects of treatment with TGF-beta1, IL-6, or a combination of both on c-met expression and Sp1 DNA binding were studied in HGF-induced rat hepatocyte cultures. RESULTS Compared to SH rats, in PH rat livers c-met was up-regulated after 6 h and Sp1 DNA binding was at or only slightly lower than levels at all time points studied. In FHF rat livers, c-met expression was markedly reduced after 2 and 6 h, moderate after 12 h, and undetectable after 24 h. At the same time, Sp1 DNA binding was detected at 2 h postinduction only. In FHF rats, blood levels of all three cytokines showed early and sustained elevation. In vitro, IL-6 had no effect on c-met expression, whereas TGFbeta1 up-regulated c-met. When used alone, none of the cytokines affected Sp1 DNA binding activity. In contrast, a combination of IL-6 and TGFbeta1 down-regulated c-met expression as well as Sp1 DNA binding activity. These effects were dependent on the IL-6 concentration used. This study suggests that following massive loss of hepatocyte mass in rats, early increase in blood IL-6 and TGFbeta1 levels may weaken the expression of HGF receptor c-met in surviving hepatocytes through suppression of Sp1 DNA binding.
Collapse
Affiliation(s)
- T Mizuguchi
- Liver Support Research Laboratory, UCLA School of Medicine, Los Angeles, CA 90048, USA
| | | | | | | | | | | | | |
Collapse
|
46
|
Kamohara Y, Sugiyama N, Mizuguchi T, Inderbitzin D, Lilja H, Middleton Y, Neuman T, Demetriou AA, Rozga J. Inhibition of signal transducer and activator transcription factor 3 in rats with acute hepatic failure. Biochem Biophys Res Commun 2000; 273:129-35. [PMID: 10873574 DOI: 10.1006/bbrc.2000.2881] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In fulminant hepatic failure, survival is not possible without recovery of sufficient hepatocyte mass. Remarkably, only a few studies exist that provide insight into the mechanisms that control proliferation of residual hepatocytes after extensive hepatocyte loss. In this regard, the role of growth-regulatory factors, including pro-inflammatory cytokines such as interleukin-6 (IL-6), is not well understood. In the present study we show that in rats with critically low (10%) hepatocyte mass, whether with or without ongoing liver cell necrosis, inhibition of liver regeneration is associated with early and sustained increase in blood IL-6 levels. Under these conditions, the signal transducer and activator of transcription (Stat3) DNA binding activity was lowered at the time of G1/S cell-cycle transition. We further demonstrate that the protein inhibitor of activated Stat3 (PIAS3) and the suppressor of cytokine signaling (SOCS-1) were up-regulated early after induction of liver failure (6-12 h). In vitro, IL-6 induced PIAS3 expression in HGF stimulated rat hepatocytes. These findings suggest that after massive hepatocyte loss, an early and rapid rise in blood IL-6 levels may weaken the hepatic regenerative response through up-regulation of Stat3 inhibitors PIAS3 and SOCS-1.
Collapse
Affiliation(s)
- Y Kamohara
- Liver Support Research Laboratory, Cedars Sinai Medical Center, Los Angeles, California 90048, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Abstract
To develop an effective hybrid bioartificial liver (BAL) device, the material of the scaffold is very important to support hepatocytes that have both growth ability and hepatic differentiated functions. In this study we used paper (Kimwipe, Kimberly-Clark Corp., Roswell, GA, U.S.A.) as a scaffold. Primary hepatocytes isolated from a normal adult rat liver could proliferate on the paper. The secretion of albumin into culture medium by the cells on the paper increased with time in culture and, compared to the cells on dishes, the amount of 48 h albumin secretion at Day 10 was two times larger. Perpendicular sections of hepatocytes on the paper revealed that the cells fell into cavities made by intersecting fibers, piled up, and formed three to four layers. The piled-up cells changed their shape from flat to cuboidal and enlarged their cytoplasm, which was rich in organelles such as mitochondria and peroxisomes with a nucleoid. In addition, they formed bile canalicular structures between the cells. Their morphological appearance was similar to in vivo hepatocytes. Paper (Kimwipe) may be a good candidate as a scaffold to make a BAL device.
Collapse
Affiliation(s)
- T Mizuguchi
- Department of Surgery; Department of Pathology, Cancer Research Institute, Sapporo Medical University School of Medicine, Sapporo, Japan
| | | | | | | | | |
Collapse
|
48
|
Sato F, Mitaka T, Mizuguchi T, Mochizuki Y, Hirata K. Effects of nicotinamide-related agents on the growth of primary rat hepatocytes and formation of small hepatocyte colonies. Liver 1999; 19:481-8. [PMID: 10661681 DOI: 10.1111/j.1478-3231.1999.tb00080.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AIMS/BACKGROUND We report in this study that, 10 mM nicotinamide can stimulate the proliferation of primary rat hepatocytes in serum-free Dulbecco's modified Eagle's medium supplemented with 10 ng/ml epidermal growth factor and that small hepatocyte colonies appear from 4 to 5 days after plating. We examined the effects of nicotinamide-related agents on the growth and differentiation of primary rat hepatocytes and on the appearance of small hepatocyte colonies. METHODS As nicotinamide is an aqueous vitamin named niacin and known to act as an inhibitor of poly (ADP-ribose) polymerase (PARP), we therefore chose to examine the effects on hepatocytes of three nicotinamide-related agents, nicotinic acid (NA) which is also a niacin, 3-aminobenzamide (3-AB) which is a strong inhibitor of PARP but is not a niacin, and 3-acetylpyridine (3-AP) which is a weak inhibitor of PARP and also not a niacin. To examine their effects on the growth of the cells and on the formation of the colony, immunocytochemistry for BrdU was carried out. Expression of albumin, tryptophan 2,3-dioxygenase (TO), and connexin 32 (Cx32) mRNAs were used as marks of hepatic differentiation. Intracellular NAD+ content was also measured. RESULTS At concentration of 10 mM, NA could not enhance the proliferation of mature hepatocytes but induced the appearance of small hepatocyte colonies. At concentration of 5 mM, 3-AB enhanced the proliferation of the hepatocytes but did not induce small hepatocyte colonies. On the other hand, although 10 mM 3-AP remarkably inhibited the DNA synthesis of the cells, the expression not only of albumin but also of TO and Cx32 mRNAs in the cells was well maintained for more than one week. The intracellular NAD+ concentration was correlated with the proliferation of the hepatocytes. CONCLUSION These results suggest that the intracellular NAD+ content may be correlated with the proliferation of primary hepatocytes and that the supplementation of niacin in the medium may be important for the appearance of small hepatocyte colonies.
Collapse
Affiliation(s)
- F Sato
- First Department of Surgery, Cancer Research Institute, Sapporo Medical University School of Medicine, Japan
| | | | | | | | | |
Collapse
|
49
|
Shimizu H, Mizuguchi T, Tanaka E, Shioya S. Nisin production by a mixed-culture system consisting of Lactococcus lactis and Kluyveromyces marxianus. Appl Environ Microbiol 1999; 65:3134-41. [PMID: 10388714 PMCID: PMC91467 DOI: 10.1128/aem.65.7.3134-3141.1999] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
To control the pH during antimicrobial peptide (nisin) production by a lactic acid bacterium, Lactococcus lactis subsp. lactis (ATCC11454), a novel method involving neither addition of alkali nor a separation system such as a ceramic membrane filter and electrodialyzer was developed. A mixed culture of L. lactis and Kluyveromyces marxianus, which was isolated from kefir grains, was utilized in the developed system. The interaction between lactate production by L. lactis and its assimilation by K. marxianus was used to control the pH. To utilize the interaction of these microorganisms to maintain high-level production of nisin, the kinetics of growth of, and production of lactate, acetate, and nisin by, L. lactis were investigated. The kinetics of growth of and lactic acid consumption by K. marxianus were also investigated. Because the pH of the medium could be controlled by the lactate consumption of K. marxianus and the specific lactate consumption rate of K. marxianus could be controlled by changing the dissolved oxygen (DO) concentration, a cascade pH controller coupled with DO control was developed. As a result, the pH was kept constant because the lactate level was kept low and nisin accumulated in the medium to a high level compared with that attained using other pH control strategies, such as with processes lacking pH control and those in which pH is controlled by addition of alkali.
Collapse
Affiliation(s)
- H Shimizu
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | | | | | | |
Collapse
|
50
|
Abstract
Hepatic cells isolated from an adult rat liver, consisting of small hepatocytes (SHs), mature hepatocytes (MHs), liver epithelial cells (LECs), Kupffer cells, sinusoidal endothelial cells, and stellate cells, were cultured in a medium supplemented with 10% fetal bovine serum, 10 mmol/L nicotinamide, 1 mmol/L ascorbic acid 2-phosphate, 10 ng/mL epidermal growth factor, and 1% dimethyl sulfoxide. The SHs rapidly proliferated and formed a colony. About 10% of cytokeratin 8 (CK8)-positive cells formed SH colonies. All SHs at day 10 immunocytochemically showed positivity for albumin, transferrin, CK8, and CK18, which are markers for hepatocytes. In contrast, alpha-fetoprotein (AFP)-, CK14-, OC2-, and glutathione S-transferase placental type (GST-P)-positive cells, which are thought to be markers for hepatic immature cells, were rarely observed. At day 20 some cells in the colonies were positive for AFP, CK7, CK19, and GST-P. LECs and stellate cells proliferated and surrounded the colonies. About 2 weeks after plating, piled up cells were often observed on the SH colonies. In those colonies LECs and stellate cells invaded under the colonies. The invasion of the cells and gradual deposits of extracellular matrix (ECM) such as type I collagen, type IV collagen, and laminin induced alteration of the shape of the SHs from relatively flat to cuboidal or rectangular. With the cellular structural changes, the expression of albumin, connexin 32 (Cx32), and tryptophan 2,3-dioxygenase (TO) messenger RNAs increased. In addition, overlapping nonparenchymal cells (NPCs) on the piled up cells induced the formation of duct- or cyst-like structures consisting of MHs. In the present experiment we showed that SHs could differentiate to MHs by interacting with NPCs and ECM. Thus, SHs may be "committed progenitor cells" that can further differentiate into MHs.
Collapse
Affiliation(s)
- T Mitaka
- Department of Pathology, Cancer Research Institute, Sapporo Medical University School of Medicine, Sapporo,
| | | | | | | | | |
Collapse
|