TY - JOUR
T1 - The efficacy of acrylic acid grafting and arginine-glycine-aspartic acid peptide immobilization on fibrovascular ingrowth into porous polyethylene implants in rabbits
AU - Park, Byung Woo
AU - Yang, Hee Seok
AU - Baek, Se Hyun
AU - Park, Kwideok
AU - Han, Dong Keun
AU - Lee, Tae Soo
N1 - Funding Information:
Acknowledgement This work was supported by KIST grant 2E19220 from Ministry of Science and Technology, Korea. The authors are grateful to two pathologists, Ju-Han Lee and Ji-Hye Lee at Department of Pathology, School of Medicine, Korea University, who examined the histopathological sections.
PY - 2007/6
Y1 - 2007/6
N2 - Purpose: To determine the effects of acrylic acid (AA) grafting by argon plasma treatment and of immobilization of arginine-glycine-aspartic acid (RGD) peptides on fibrovascular ingrowth rate into high-density porous polyethylene (HPPE) anophthalmic orbital implants. Materials and methods: Sixty rabbits were divided into three groups, with 20 rabbits in each group: (1) control group, rabbits implanted with unmodified HPPE; (2) PAA group, rabbits implanted with HPPE grafted with poly(AA) by argon plasma treatment; (3) RGD group, rabbits implanted with HPPE grafted with AA by argon plasma treatment and subsequently immobilized with RGD peptide. An HPPE spherical implant was put in the abdominal muscles of rabbit. After implantation for 4 weeks, the retrieved implants were sectioned and stained with hematoxylin and eosin (H&E). Blood vessels were counted using CD-31 immunostaining. Cross-sectional areas of fibrovascular ingrowth, blood vessel densities, and host inflammatory response scores were determined for all three groups. Results: The mean cross-sectional areas of fibrovascularization at 2 and 3 weeks after implantation were the greatest in the RGD group, followed by the PAA group. While minimal fibrovascular ingrowths were noted in all implants at 1 week, all the implants showed nearly complete ingrowth at 4 weeks. Blood vessel densities were the highest in the RGD group, followed by the PAA group at 2, 3, and 4 weeks. The mean inflammation scores of the PAA and RGD groups were less than that of the control group. Conclusion: Fibrovascularization into HPPE implants was enhancedby surface grafting of AA and further improved by immobilizing RGD peptides onto the grafted AA surfaces. The inflammatory reactions were mild by either technique of surface modification.
AB - Purpose: To determine the effects of acrylic acid (AA) grafting by argon plasma treatment and of immobilization of arginine-glycine-aspartic acid (RGD) peptides on fibrovascular ingrowth rate into high-density porous polyethylene (HPPE) anophthalmic orbital implants. Materials and methods: Sixty rabbits were divided into three groups, with 20 rabbits in each group: (1) control group, rabbits implanted with unmodified HPPE; (2) PAA group, rabbits implanted with HPPE grafted with poly(AA) by argon plasma treatment; (3) RGD group, rabbits implanted with HPPE grafted with AA by argon plasma treatment and subsequently immobilized with RGD peptide. An HPPE spherical implant was put in the abdominal muscles of rabbit. After implantation for 4 weeks, the retrieved implants were sectioned and stained with hematoxylin and eosin (H&E). Blood vessels were counted using CD-31 immunostaining. Cross-sectional areas of fibrovascular ingrowth, blood vessel densities, and host inflammatory response scores were determined for all three groups. Results: The mean cross-sectional areas of fibrovascularization at 2 and 3 weeks after implantation were the greatest in the RGD group, followed by the PAA group. While minimal fibrovascular ingrowths were noted in all implants at 1 week, all the implants showed nearly complete ingrowth at 4 weeks. Blood vessel densities were the highest in the RGD group, followed by the PAA group at 2, 3, and 4 weeks. The mean inflammation scores of the PAA and RGD groups were less than that of the control group. Conclusion: Fibrovascularization into HPPE implants was enhancedby surface grafting of AA and further improved by immobilizing RGD peptides onto the grafted AA surfaces. The inflammatory reactions were mild by either technique of surface modification.
KW - Acrylic acid
KW - Anophthalmic implant
KW - Fibrovascular ingrowth
KW - Medpor
KW - Polyethylene
KW - RGD
KW - Surface modification
UR - http://www.scopus.com/inward/record.url?scp=34249338683&partnerID=8YFLogxK
U2 - 10.1007/s00417-006-0475-3
DO - 10.1007/s00417-006-0475-3
M3 - Article
C2 - 17119998
AN - SCOPUS:34249338683
SN - 0065-6100
VL - 245
SP - 855
EP - 862
JO - Albrecht von Graefes Archiv für Klinische und Experimentelle Ophthalmologie
JF - Albrecht von Graefes Archiv für Klinische und Experimentelle Ophthalmologie
IS - 6
ER -