title: [The effect of microencapsulated NGF-expressing NIH-3T3 cells on bioengineered dermis function in vitro].
abstract: Nerve growth factor (NGF) can promote the regeneration of peripheral nerve as well as contraction and reepithelization of wound. We constructed a bioengineered dermis containing microencapsulated NGF-expressing NIH-3T3 cells and study the effect of the microencapsule to the bioengineered dermis and seed cells. NGF gene was transfected into NIH-3T3 cells and enclosed into alginate-poly-L-lysine-alginate (APA) microencapsulation and cultivated in vitro. Content of NGF in microencapsules culturing supernatant was measured by enzyme linked immunosorbent assay (ELISA) method. These microencapsules were co-cultured with epidermic cells and fibroblast cells. Bioengineered dermis was constructed with NGF-expressing micorencapsules as seed cells using tissue engineering method. NIH-3T3 microencapsules, empty microencapsules, normal culture media were control groups. After one week culture, the characteristics of the dermis were described by MTT test, the content of hydroxyproline (HP), HE staining and ultrastructure photograph. We found the NGF-expressing microencapsulates can secret NGF steadly after cultured 8w in vitro, promot the proliferation of epidermic cells and secret collagen of fibroblast cells. These functions can maintaine in bioengineered dermis. So NGF-expressing NIH-3T3 microencapsulates can promote the quality of bioengineered dermis.
authors.affiliation: Department of Plastic and Burn Surgery, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China.
authors.forename: Zhaohua
authors.initials: Z
authors.lastname: Hu
authors.forename: Shaozong
authors.initials: S
authors.lastname: Chen
authors.forename: Yan
authors.initials: Y
authors.lastname: Jin
authors.forename: Ying
authors.initials: Y
authors.lastname: Xiong
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Ma
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhao
authors.forename: Wangzhou
authors.initials: W
authors.lastname: Li
authors.forename: Zhanjun
authors.initials: Z
authors.lastname: Lei
mesh_terms: D000464:Alginates / Q000737:chemistry*; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry; D049109:Cell Proliferation; D020405:Dermis / Q000166:cytology*; D005786:Gene Expression Regulation; D051379:Mice; D041681:NIH 3T3 Cells; D020932:Nerve Growth Factor / Q000235:genetics*; D011107:Polylysine / Q000031:analogs & derivatives* / Q000737:chemistry; D012879:Skin Physiological Phenomena; D023822:Tissue Engineering / Q000379:methods*; D014162:Transfection / Q000379:methods
chemical_list: D000464:Alginates; D001672:Biocompatible Materials; C051546:alginate-polylysine-alginate; D011107:Polylysine; D020932:Nerve Growth Factor