Cloning of peptide auto antibodies

• Project/Area Number: 15K15277
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: General internal medicine(including psychosomatic medicine)
• Research Institution: Kagoshima University
• Principal Investigator: Inui Akio 鹿児島大学, 医歯学域医学系, 教授 (80168418)
• Co-Investigator(Renkei-kenkyūsha): KATSUURA Goro 鹿児島大学, 大学院医歯学総合研究科, 特任講師 (20401226)
• Project Period (FY): 2015-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2015: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: 摂食関連ペプチド / グレリン自己抗体 / 食行動異常

Outline of Final Research Achievements

We intended for obesity patients and measured the plasma antibody titer for appetite adjustment peptide and confirmed that antibody titer for acyl ghrelin and the death acyl ghrelin was a high price. In addition, we made single-chain Fv fragment (scFv), which we tied the variable region of the antibody gene from the blood of the adiposity patient. Using the phage display method and the biopanning method, we purified the antibody bacteriophage which specifically bind to acyl ghrelin and des-acyl ghrelin. The reaction of refined antibody bacteriophages to acyl ghrelin, des-acyl ghrelin and other antigens measured them using the ELISA method. We confirmed it's specificity for ghrelin.

Research Products

• [Journal Article] Increased ghrelin signaling prolongs survival in mouse models of human aging through activation of sirtuin1. (2016)
  • Author(s): Fujitsuka N, Asakawa A, Morinaga A, Amitani MS, Amitani H, Katsuura G, Sawada Y, Sudo Y, Uezono Y, Mochiki E, Sakata I, Sakai T, Hanazaki K, Yada T, Yakabi K, Sakuma E, Ueki T, Niijima A, Nakagawa K, Okubo N, Takeda H, Asaka M, Inui A.
  • Journal Title: Mol Psychiatry Volume: 21 Issue: 11 Pages: 1-11
  • DOI: 10.1038/mp.2015.220
  • Peer Reviewed / Open Access
• [Journal Article] グレリンの臨床応用 (2016)
  • Author(s): 乾 明夫
  • Journal Title: 日本潰瘍学会誌『潰瘍』 Volume: 43
• [Presentation] グレリンの臨床応用 (2015)
  • Author(s): 乾 明夫
  • Organizer: 第43回日本潰瘍学会
  • Place of Presentation: 沖縄科学技術大学院大学
  • Year and Date: 2015-06-19
  • Invited