Recombinant human IGF-1 produced by transgenic plant cell suspension culture enhances new bone formation in calvarial defects.
Growth Horm IGF Res
; 36: 1-10, 2017 10.
Article
in En
| MEDLINE
| ID: mdl-28787635
Transgenic plant cell suspension culture systems have been utilized extensively as convenient and efficient expression systems for the production of recombinant human growth factors. We produced insulin-like growth factor-1 using a plant suspension culture system (p-IGF-1) and explored its effect on new bone formation in calvarial defects. We also compared the bone regenerating potential of p-IGF-1 with commercial IGF-1 derived from Escherichia coli (e-IGF-1). Male C57BL/6 mice underwent calvarial defect surgery, and the defects were loaded with absorbable collagen sponge (ACS) only (ACS group) or ACS impregnated with 13µg of p-IGF-1 (p-IGF-1 group) or e-IGF-1 (e-IGF-1 group). The sham group did not receive any treatment with ACS or IGFs after surgery. Live µCT and histological analyses showed critical-sized bone defects in the sham group, whereas greater bone formation was observed in the p-IGF-1 and e-IGF-1 groups than the ACS group both 5 and 10weeks after surgery. Bone mineral density, bone volume, and bone surface values were also higher in the IGF groups than in the ACS group. Local delivery of p-IGF-1 or e-IGF-1 more greatly enhanced the expression of osteoblast-specific markers, but inhibited osteoclast formation, in newly formed bone compared with ACS control group. Specifically, p-IGF-1 treatment induced higher expression of alkaline phosphatase, osteocalcin, and osteopontin in the defect site than did e-IGF-1. Furthermore, treatment with p-IGF-1, but not e-IGF-1, increased mineralization of MC3T3-E1 cells, with the attendant upregulation of osteogenic marker genes. Collectively, our findings suggest the potential of p-IGF-1 in promoting the processes required for bone regeneration.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Osteogenesis
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Skull
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Recombinant Proteins
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Insulin-Like Growth Factor I
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Plants, Genetically Modified
Limits:
Animals
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Humans
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Male
Language:
En
Journal:
Growth Horm IGF Res
Journal subject:
ENDOCRINOLOGIA
Year:
2017
Document type:
Article
Affiliation country:
Country of publication: