Expressions of matrix metalloproteinases-1 and-9 and opioid growth factor in rabbit cornea after lamellar keratectomy and treatment with 1% nalbuphine

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Silva, Miguel Ladino
Ribeiro, Alexandre Pinto
Silva, Germana Alegro
Barbosa Sanchez, Irma Ximena
Renzo, Roberta
Uscategui, Ricardo
Lima, Tiago Barbalho
Aldrovani, Marcela
Laus, Jose Luiz
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Consel Brasil Oftalmologia
Purposes: To evaluate the effects of nalbuphine 1% on the expression of metalloproteinase 1 (MMP-1), metalloproteinase 9 (MMP-9), and opioid growth factor (OGF) in rabbit corneas after lamellar keratectomy. Methods: The rabbits were assigned to two groups: group nalbuphine (GN, n=30), which received 30 mu L of nalbuphine 1% in 4 daily applications at regular intervals until corneal epithelialization, and group control (GC, n=30), which received physiological saline solution under the same conditions adopted in GN. The corneas were collected for immunohistochemistry on days 1, 3, 5, 7, and 9 after lamellar keratectomy, and the expressions of MMP-1, MMP-9, and OGF were analyzed. Results: The expressions of MMP-1 and MMP-9 increased until day 5 of the evaluation, with no differences observed between GN and GC (p>0.05). On days 7 and 9, significant reductions were observed in the expression of MMP-1 (p<0.01), with no differences observed between GN and GC (p>0.05). The expression of OGF was constant in all periods (p>0.05), restricted to the corneal epithelium, and there was no difference between the groups (p>0.05). Conclusions: The study results showed that nalbuphine 1% did not alter the expression patterns of MMP-1, MMP-9, and OGF in rabbit corneas after lamellar keratectomy.
Cornea, Photorefractive keratectomy, Nalbuphine/therapeutic use, Matrix metalloproteinases, Receptors, opioid, Immunohistochemistry, Animals, Rabbits
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Arquivos Brasileiros De Oftalmologia. Sao Paulo: Consel Brasil Oftalmologia, v. 78, n. 3, p. 141-145, 2015.