[Protective effect of non-mitogenic haFGF on retinal injury induced by N-methyl-N-nitrosourea in Sprague-Dawley rats]. 2005

Hua Xu, and Jin-nan Yang, and Qing Zheng, and Cheng-can Yao, and Yan-ping Wang, and Ji-zhou Xiang, and Xiao-kun Li
Pharmacy College of Jinan University, Guangzhou 510632, China. huax_mail@sohu.com

OBJECTIVE To study the effect of non-mitogenic human acidic fibroblast growth factor (nm-haFGF) on retinal injury induced by N-methyl-N-nitrosourea (MNU) in Sprague-Dawley rats and its mechanism. METHODS Female rats of 50-days-old were injected with MNU (60 mg x kg(-1)) intraperitoneally, and three doses of nm-haFGF (1.25 microg, 2.5 microg and 5 microg in one eye of each rat) were injected, separately, into vitreous body of one eye of each rat twice a day at 0 and 12 h after MNU treatment. 24 h later, apoptotic index of photoreceptor cells was detected by TUNEL labeling and the expressions of Bcl-2 and Bax were analyzed by Western blotting. At the 7th day, retinal injury was evaluated based on retinal thickness. RESULTS Compared with model group, apoptotic index of photoreceptor cells was significantly reduced in nm-haFGF groups at the dose of 1.25 microg and 2.5 microg in one eye of each rat at 24 h, and the total retinal thickness as well as the outer retinal thickness markedly increased 7 days after MNU, respectively. The expressions of Bcl-2 increased and that of Bax decreased adversely after being injected with different doses of nm-haFGF. CONCLUSIONS nm-haFGF partially suppressed retinal injury induced by MNU in Sprague-Dawley rats. The mechanism could be related to up-regulation of Bcl-2 and down-regulation of Bax.

UI MeSH Term Description Entries
D008770 Methylnitrosourea A nitrosourea compound with alkylating, carcinogenic, and mutagenic properties. Nitrosomethylurea,N-Methyl-N-nitrosourea,NSC-23909,N Methyl N nitrosourea,NSC 23909,NSC23909
D011897 Random Allocation A process involving chance used in therapeutic trials or other research endeavor for allocating experimental subjects, human or animal, between treatment and control groups, or among treatment groups. It may also apply to experiments on inanimate objects. Randomization,Allocation, Random
D012160 Retina The ten-layered nervous tissue membrane of the eye. It is continuous with the OPTIC NERVE and receives images of external objects and transmits visual impulses to the brain. Its outer surface is in contact with the CHOROID and the inner surface with the VITREOUS BODY. The outer-most layer is pigmented, whereas the inner nine layers are transparent. Ora Serrata
D005260 Female Females
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012174 Retinitis Pigmentosa Hereditary, progressive degeneration of the retina due to death of ROD PHOTORECEPTORS initially and subsequent death of CONE PHOTORECEPTORS. It is characterized by deposition of pigment in the retina. Pigmentary Retinopathy,Tapetoretinal Degeneration,Pigmentary Retinopathies,Retinopathies, Pigmentary,Retinopathy, Pigmentary,Tapetoretinal Degenerations
D016220 Fibroblast Growth Factor 1 A 17-kDa single-chain polypeptide growth factor that plays a significant role in the process of WOUND HEALING and is a potent inducer of PHYSIOLOGIC ANGIOGENESIS. It binds to HEPARIN, which potentiates its biological activity and protects it from proteolysis. The growth factor is an extremely potent inducer of DNA synthesis in a variety of cell types from mesoderm and neuroectoderm lineages, and also has chemotactic and mitogenic activities. It was originally named acidic fibroblast growth factor based upon its chemical properties and to distinguish it from basic fibroblast growth factor (FIBROBLAST GROWTH FACTOR 2). Acidic Fibroblast Growth Factor,Class I Heparin-Binding Growth Factor,Fibroblast Growth Factor, Acidic,HBGF-1,Heparin-Binding Fibroblast Growth Factor Class I,Heparin-Binding Growth Factor, Class I,FGF-1,FGF1,Fibroblast Growth Factor-1,Heparin Binding Growth Factor, Class I
D017207 Rats, Sprague-Dawley A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the Sprague-Dawley Animal Company. Holtzman Rat,Rats, Holtzman,Sprague-Dawley Rat,Rats, Sprague Dawley,Holtzman Rats,Rat, Holtzman,Rat, Sprague-Dawley,Sprague Dawley Rat,Sprague Dawley Rats,Sprague-Dawley Rats
D017209 Apoptosis A regulated cell death mechanism characterized by distinctive morphologic changes in the nucleus and cytoplasm, including the endonucleolytic cleavage of genomic DNA, at regularly spaced, internucleosomal sites, i.e., DNA FRAGMENTATION. It is genetically programmed and serves as a balance to mitosis in regulating the size of animal tissues and in mediating pathologic processes associated with tumor growth. Apoptosis, Extrinsic Pathway,Apoptosis, Intrinsic Pathway,Caspase-Dependent Apoptosis,Classic Apoptosis,Classical Apoptosis,Programmed Cell Death,Programmed Cell Death, Type I,Apoptoses, Extrinsic Pathway,Apoptoses, Intrinsic Pathway,Apoptosis, Caspase-Dependent,Apoptosis, Classic,Apoptosis, Classical,Caspase Dependent Apoptosis,Cell Death, Programmed,Classic Apoptoses,Extrinsic Pathway Apoptoses,Extrinsic Pathway Apoptosis,Intrinsic Pathway Apoptoses,Intrinsic Pathway Apoptosis
D051028 bcl-2-Associated X Protein A member of the Bcl-2 protein family and homologous partner of C-BCL-2 PROTO-ONCOGENE PROTEIN. It regulates the release of CYTOCHROME C and APOPTOSIS INDUCING FACTOR from the MITOCHONDRIA. Several isoforms of BCL2-associated X protein occur due to ALTERNATIVE SPLICING of the mRNA for this protein. Bax Protein,Bax-alpha Protein,Bax-omega Protein,Bax-sigma Protein,Bax Apoptosis Regulator Protein,Bax-beta Protein,Bax-delta Protein,bcl2-Associated X Protein,bcl2-Associated X Protein Isoform alpha,bcl2-Associated X Protein Isoform beta,bcl2-Associated X Protein Isoform delta,bcl2-Associated X Protein Isoform omega,bcl2-Associated X Protein Isoform sigma,Bax alpha Protein,Bax beta Protein,Bax delta Protein,Bax omega Protein,Bax sigma Protein,Protein, bcl-2-Associated X,X Protein, bcl-2-Associated,bcl 2 Associated X Protein,bcl2 Associated X Protein,bcl2 Associated X Protein Isoform alpha,bcl2 Associated X Protein Isoform beta,bcl2 Associated X Protein Isoform delta,bcl2 Associated X Protein Isoform omega,bcl2 Associated X Protein Isoform sigma

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