title: Thermo-reversible injectable gel based on enzymatically-chopped low molecular weight methylcellulose for exenatide and FGF 21 delivery to treat types 1 and 2 diabetes.
abstract: Diabetes is the fastest growing metabolic disease that fails to utilize glucose properly due to insulin deficiency or insulin resistance. Although several limited studies demonstrated non-invasive means of protein delivery, major hurdles for commercial success such as short half-life, enzymatic degradation and low bioavailability still remain to overcome. Methylcellulose (MC), a hydrophobically-modified cellulose derivative, forms temperature reversible gel in aqueous solution. However, as the gelling temperature of MC is higher than body temperature, it should be lowered to below body temperature for practical clinical application. In order to decrease gelling temperature and increase bio-compatibility and bio-elimination of MC, the molecular weight of MC was decreased using enzymatic degradation method and confirmed by gel permeation chromatography. Bio-elimination of low molecular weight (LMw) MC was confirmed with non-invasive live image and ex vivo experiment. The exenatide and FGF 21 were physically loaded 100% into LMwMC-based thermo-reversible gel and slowly released from gel with no initial bursts. Exenatide-loaded LMwMC gel showed reduction of blood glucose level for a week in type 1 diabetic animal model. FGF 21-loaded LMwMC gel reduced glucose level to normal condition and maintained over 10 days in type 2 diabetic animal model. LMwMC-based thermo-reversible and injectable hydrogel provides a strong potential to be efficient protein drug delivery system for the treatment of type 1 and type 2 diabetes.
authors.affiliation: Department of Bioengineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: Jang Kyoung
authors.initials: JK
authors.lastname: Kim
authors.affiliation: Department of Bioengineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: Changhun
authors.initials: C
authors.lastname: Yoo
authors.affiliation: Department of Bioengineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: Yong-Hoon
authors.initials: YH
authors.lastname: Cha
authors.affiliation: Department of Bioengineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea; Institute for Bioengineering and Biopharmaceutical Research, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea. Electronic address: yongheekim@hanyang.ac.kr.
authors.forename: Yong-Hee
authors.initials: YH
authors.lastname: Kim
mesh_terms: D000818:Animals; D001786:Blood Glucose / Q000378:metabolism; D003921:Diabetes Mellitus, Experimental / Q000188:drug therapy; D003922:Diabetes Mellitus, Type 1 / Q000188:drug therapy*; D003924:Diabetes Mellitus, Type 2 / Q000188:drug therapy*; D000077270:Exenatide; D005346:Fibroblast Growth Factors / Q000008:administration & dosage* / Q000493:pharmacokinetics / Q000627:therapeutic use*; D005782:Gels / Q000737:chemistry*; D007004:Hypoglycemic Agents / Q000008:administration & dosage* / Q000493:pharmacokinetics / Q000627:therapeutic use*; D008297:Male; D008747:Methylcellulose / Q000737:chemistry*; D051379:Mice; D008807:Mice, Inbred BALB C; D008970:Molecular Weight; D010455:Peptides / Q000008:administration & dosage* / Q000493:pharmacokinetics / Q000627:therapeutic use*; D010592:Pharmaceutic Aids / Q000737:chemistry*; D013816:Thermodynamics; D014018:Tissue Distribution; D014688:Venoms / Q000008:administration & dosage* / Q000493:pharmacokinetics / Q000627:therapeutic use*
chemical_list: D001786:Blood Glucose; D005782:Gels; D007004:Hypoglycemic Agents; D010455:Peptides; D010592:Pharmaceutic Aids; D014688:Venoms; C414620:fibroblast growth factor 21; D005346:Fibroblast Growth Factors; D008747:Methylcellulose; D000077270:Exenatide
keywords: Diabetes; Enzymatically-chopped low molecular weight methylcellulose; Protein delivery; Thermo-reversible gel