Crosslinked poly(1-vinyl-2-pyrrolidinone) as a vitreous substitute

Y. Hong, T.V. Chirila, S. Vijayasekaran, P.D. Dalton, S.G. Tahija, Maximiliaan Cuypers, Ian Constable

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Abstract

A hydrogel with a high water content was produced and tested as a possible vitreous substitute. The polymer (poly[1-vinyl-2-pyrrolidinone]) (PVP) was synthesized by free radical bulk polymerization of 1-vinyl-2-pyrrolidinone (VP) in the presence of 0.25% divinyl glycol (DVG) as a crosslinking agent. The fully hydrated polymer, containing about 98% water, was clear, transparent, autoclavable, and easily injected through a small-gauge needle with minimum fragmentation, and without changes in its optical properties. Dynamic mechanical analysis of the hydrogel indicated a covalently crosslinked elastic network both before and after injection. The resilience of hydrogel decreased after being subjected to shear stress during the injection process. A cytotoxicity bioassay of the hydrogel in vitro, using cultured mouse (Balb/c-3T3) fibroblasts, showed cytostatic but not cytocidal effects. The hydrogel was injected into the vitreous cavity of rabbits and followed up to 4 weeks. The gel was clinically well tolerated, however opacities in the vitreous body were observed following the insertion of the gel. Histopathological examination revealed no adverse reactions to the retina, but the presence of loose polymer particles indicated the possibility of the biodegradation of the polymer. These results suggest the potential use of crosslinked PVP hydrogels as vitreous substitutes, provided that their biodegradation is not significant, a matter that should be further investigated. (C) 1996 John Wiley & Sons, Inc.
Original languageEnglish
Pages (from-to)441-448
JournalJournal of Biomedical Materials Research Part A
Volume30
Issue number4
DOIs
Publication statusPublished - 1996

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Hydrogel
Hydrogels
Polymers
Biodegradation
Gels
Glycols
Bioassay
Opacity
Cytostatic Agents
Dynamic mechanical analysis
Fibroblasts
Cytotoxicity
Needles
Crosslinking
Water content
Gages
Free Radicals
Shear stress
Free radicals
Optical properties

Cite this

Hong, Y. ; Chirila, T.V. ; Vijayasekaran, S. ; Dalton, P.D. ; Tahija, S.G. ; Cuypers, Maximiliaan ; Constable, Ian. / Crosslinked poly(1-vinyl-2-pyrrolidinone) as a vitreous substitute. In: Journal of Biomedical Materials Research Part A. 1996 ; Vol. 30, No. 4. pp. 441-448.
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Crosslinked poly(1-vinyl-2-pyrrolidinone) as a vitreous substitute. / Hong, Y.; Chirila, T.V.; Vijayasekaran, S.; Dalton, P.D.; Tahija, S.G.; Cuypers, Maximiliaan; Constable, Ian.

In: Journal of Biomedical Materials Research Part A, Vol. 30, No. 4, 1996, p. 441-448.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Crosslinked poly(1-vinyl-2-pyrrolidinone) as a vitreous substitute

AU - Hong, Y.

AU - Chirila, T.V.

AU - Vijayasekaran, S.

AU - Dalton, P.D.

AU - Tahija, S.G.

AU - Cuypers, Maximiliaan

AU - Constable, Ian

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N2 - A hydrogel with a high water content was produced and tested as a possible vitreous substitute. The polymer (poly[1-vinyl-2-pyrrolidinone]) (PVP) was synthesized by free radical bulk polymerization of 1-vinyl-2-pyrrolidinone (VP) in the presence of 0.25% divinyl glycol (DVG) as a crosslinking agent. The fully hydrated polymer, containing about 98% water, was clear, transparent, autoclavable, and easily injected through a small-gauge needle with minimum fragmentation, and without changes in its optical properties. Dynamic mechanical analysis of the hydrogel indicated a covalently crosslinked elastic network both before and after injection. The resilience of hydrogel decreased after being subjected to shear stress during the injection process. A cytotoxicity bioassay of the hydrogel in vitro, using cultured mouse (Balb/c-3T3) fibroblasts, showed cytostatic but not cytocidal effects. The hydrogel was injected into the vitreous cavity of rabbits and followed up to 4 weeks. The gel was clinically well tolerated, however opacities in the vitreous body were observed following the insertion of the gel. Histopathological examination revealed no adverse reactions to the retina, but the presence of loose polymer particles indicated the possibility of the biodegradation of the polymer. These results suggest the potential use of crosslinked PVP hydrogels as vitreous substitutes, provided that their biodegradation is not significant, a matter that should be further investigated. (C) 1996 John Wiley & Sons, Inc.

AB - A hydrogel with a high water content was produced and tested as a possible vitreous substitute. The polymer (poly[1-vinyl-2-pyrrolidinone]) (PVP) was synthesized by free radical bulk polymerization of 1-vinyl-2-pyrrolidinone (VP) in the presence of 0.25% divinyl glycol (DVG) as a crosslinking agent. The fully hydrated polymer, containing about 98% water, was clear, transparent, autoclavable, and easily injected through a small-gauge needle with minimum fragmentation, and without changes in its optical properties. Dynamic mechanical analysis of the hydrogel indicated a covalently crosslinked elastic network both before and after injection. The resilience of hydrogel decreased after being subjected to shear stress during the injection process. A cytotoxicity bioassay of the hydrogel in vitro, using cultured mouse (Balb/c-3T3) fibroblasts, showed cytostatic but not cytocidal effects. The hydrogel was injected into the vitreous cavity of rabbits and followed up to 4 weeks. The gel was clinically well tolerated, however opacities in the vitreous body were observed following the insertion of the gel. Histopathological examination revealed no adverse reactions to the retina, but the presence of loose polymer particles indicated the possibility of the biodegradation of the polymer. These results suggest the potential use of crosslinked PVP hydrogels as vitreous substitutes, provided that their biodegradation is not significant, a matter that should be further investigated. (C) 1996 John Wiley & Sons, Inc.

U2 - 10.1002/(SICI)1097-4636(199604)30:4<441::AID-JBM2>3.0.CO;2-P

DO - 10.1002/(SICI)1097-4636(199604)30:4<441::AID-JBM2>3.0.CO;2-P

M3 - Article

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EP - 448

JO - Journal of Biomedical Materials Research

JF - Journal of Biomedical Materials Research

SN - 1549-3296

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ER -