ABSTRACT
Objective To observe the effects of tetramethyipyrazine(TMP) on retina to find out whether it can protect retina from glaucomatous damage. Methods Twenty-four rabbits were randomly divided into four groups. One eye of each rabbit was model eye induced by 2％ methylcellulous, and the other was control eye. Normal saline, TMP, timolol and a combination of timolol and TMP were administrated to group A, B, C and D respectively. At the end of 4th week, eyes were excavated for light and electron microscopic study. Results The numbers of ganglion cells (P ＜0. 01) and bipolar cells (P ＜0. 01) in model eye were different significantly between group A and B. In group A, the model eye ganglion cells were karyopyknosis, chromatin margination and nuclear membrane rupture; some in ner nuclear cells dcveloped marked lytic changes; outer segment appeared disorganized; but group B changed slight ly. Conclusion The results suggest that TMP may protect retina from glaucomatous damage.
ABSTRACT
8 cases of Hallermann-streiff syndrome were found trom 1980 to 1988. Two of them had been followed up for 7 years. The patients consisted of 6 males and 2 females at 8-32 years of age. The clinical manifestations were as follows : ① dsycephaly with bird face and ; ② congenital cataract or aphakic in all cases; ③ dental anomaly in 7 cases; ④nanism in 4 cases and the fontanel frontalis (maior) of 1 casc (case 7, males 32 years of age, height 1. 23 m, weight 29. 5 kg) was not closed, ⑤ atrophy of skin in 7 cases whosc skin appeared shine and thin, particularly on the nose top, and one or two areas of alopecia appeared in 3 of 6 cases, ⑥ hypotrichosis in 8 cases and ⑦ bilateral microphthalmia in 6 cases. ① and ② were significant for the diagnosis of Hallemann-Streiff syndrome.
ABSTRACT
Objective To observe the morphological changes of corneal nerve in experimental herpes simplex keratitis (HSK) in rabbit eyes. Methods Inoculation of the scarified cornea with herpes simplex virus-Ⅰ(HSV-Ⅰ)leads to herpetic infection of cornea. The HSK was detected by slit lamp and polymerase chain reaction(PCR), and the changes of corneal nerves in various periods with methylene blue vital staining and ultrastructure of corneal nerve were studied. Results Under light microscope, fewer corneal nerve bundles were observed, scattered with lower density of nerve fiber at center of cornea on the 4th day after the infection. At days 7 and 14, the seriously damaged nerve fiber was intermittent. The neuraxon became shorter with little polarity and the density of nerve fiber was extremely low. At day 30, the density was still low while the nerve fiber was approximately normal. Under electromicroscope, at day 4, the lamellar sheath of nerve fiber in the epitheliums appeared intermittent, and the neuroplasm of endings was partly lysed. During day 7 to day 14,neuroplasm was damaged and became vacuolar. The mitochondria swelled with vacuolar crest, and then were destroyed and lysed. The nerves in stroma were also injured. On day 30, neurilemma sheath was still intermittent with the decrease of microfilament and racuole. Conclusion HSK leads to the damage of nerve and the decrease of nerval density, and the damage of corneal nerve repairs very slowly.