CYP1B1 Gene Analysis in Primary Congenital Glaucoma Brazilian Patients Novel Mutations and Association With Poor Prognosis

Autor(es)

Della Paolera, Mauricio ^[1] ; Cabral de Vasconcellos, Jose Paulo ^[2] ; Umbelino, Cristiano Caixeta ^[1] ; Kasahara, Niro ^[1] ; Rocha, Mylene Neves ^[3] ; Richeti, Flavio ^[3] ; Costa, Vital Paulino ^[2] ; Tavares, Anderson ^[4] ; de Melo, Monica Barbosa ^{[4, 3]}

Afiliação do(s) autor(es)

^[1] Irmandade Santa Casa Misericordia Sao Paulo, Dept Ophthalmol, Glaucoma Serv, Fac Med Sci, Sao Paulo - Brazil

^[2] Univ Campinas UNICAMP, Ctr Mol Biol & Genet Engn CBMEG, Fac Med Sci, Dept Ophthalmol, Glaucoma Serv, BR-13083875 Campinas, SP - Brazil

^[3] Irmandade Santa Casa Misericordia Sao Paulo, Dept Physiol, Mol Med Lab, Fac Med Sci, Sao Paulo - Brazil

^[4] Univ Campinas UNICAMP, Ctr Mol Biol & Genet Engn CBMEG, Lab Human Mol Genet, BR-13083875 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF GLAUCOMA; v. 19, n. 3, p. 176-182, MAR 2010.
• Citações Web of Science: 16

Resumo

Purpose: To determine the spectrum of CYP1B1 gene mutations in Brazilian patients with primary congenital glaucoma, and to correlate the presence of alterations in the CYP1B1 gene sequence with clinical aspects of the disease. Materials and Methods: Thirty nonrelated patients with primary congenital glaucoma were studied. Molecular analysis consisted of the codifying region sequencing (exons 2 and 3) and intron/exon boundaries. Results: CYP1B1 gene mutations were present in 9 (30%) of the 30 patients. The structural changes in the CYP1B1 gene previously described in the literature and observed in our study were Q19X, P437L, A443G, g.4340delG, g.7901\_79013delGAGTGCAGGCAGA, g.8182delG, and g.8214\_8215delG. Three new mutations were observed: 4635delT, 4523delC, and L378Q, in addition to 3793T --> C, R48G, A119S, L432V, D449D, and N453S polymorphisms. Patients carrying CYP1B1 gene mutations needed more surgical procedures to control intraocular pressure, either when both eyes were evaluated (P = 0.003) or when the worst eye of the patient was analyzed (P = 0.011). In relation to the number of affected eyes, all patients with mutations (n = 9/9) developed bilateral glaucoma, whereas 11/21 patients without mutations in the CYP1B1 gene had bilateral glaucoma (P = 0.013). Conclusions: In this group of primary congenital glaucoma patients, a 30% mutation frequency in the CYP1B1 gene was observed. The presence of mutations was associated with a more severe form of the disease, requiring more surgeries for intraocular pressure control and with a higher rate of bilateral cases. (AU)

• Processo FAPESP: 02/11575-0 - Identificação de genes associados ao glaucoma primário de ângulo aberto
• Beneficiário: José Paulo Cabral de Vasconcellos
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores