1.Genetic etiology and clinical strategies of congenital anophthalmia and microphthalmia
Chinese Journal of Experimental Ophthalmology 2024;42(10):945-951
Congenital anophthalmia and microphthalmia refer to the absence of eyeball and a significantly shortened axial length, respectively.Among them, simple microphthalmia only has a smaller eyeball volume than normal without other eye malformations.The prevalence of congenital anophthalmia and microphthalmia is 1.18/10 000 and the etiology of the diseases are dominated by genetic defects, with common causative genes including SOX2, OTX2, PAX6 and RAX.Recent research results have shown that genetic abnormalities of MAB21L1, EPHA2, VPS35L, FAT1 are also associated with the occurrence and development of the diseases.Advanced childbearing age, gestational diabetes and smoking during pregnancy are risk factors for the diseases.Congenital anophthalmia and microphthalmia can be diagnosed by ocular ultrasound or magnetic resonance imaging measurement of axial length and corneal diameter.At present, congenital anophthalmia and microphthalmia mainly focus on symptomatic treatment.The common complications of congenital anophthalmia and microphthalmia include hyperopia, glaucoma, orbital dysplasia, and uveal effusion.To provide new ideas for the diagnosis and treatment of congenital anophthalmia and microphthalmia, genetic etiology and treatment are reviewed in this article.
2.Structural and functional parameters of adult Macaca fascicularis retina
Keren LIAO ; Bin PENG ; Hongmei ZHENG ; Yifan LIU ; Yin SHEN
Chinese Journal of Experimental Ophthalmology 2024;42(1):12-18
Objective:To measure the retinal structural and functional parameters of adult Macaca fascicularis, and explore the similarity of the retinal structural and functional parameters between non-human primates and normal human retinas.Methods:Six eyes of 3 5-year-old adult Macaca fascicularis were examined by in vivo detection including color fundus photography, retinal optical coherence tomography (OCT) and electroretinogram (ERG) to determine the thickness of the inner/outer retina at the fovea and 1 000/2 000 μm away from the nasal, temporal, superior and inferior regions of the fovea, the thickness of the retinal nerve fiber layer (RNFL), the area of optic disc, the area of optic cup, the area ratio of cup to disc and the biological parameters of flash ERG.Differences in the above parameters between left and right eyes were analyzed.The similarity of parameters between Macaca fascicularis and human was compared with reference to published literature.The use and care of animals complied with the Regulation on the Management of Experimental Animals.The study protocol was approved by the Institutional Animal Care and Use Committee of Hubei Topgene Biotechnology (NO.IACUC-2019-012). Results:The foveal thickness, optic disc area, cup-disc area ratio, and average RNFL thickness in normal adult Macaca fascicularis were (252.31±4.79)μm, (1.89±0.05)mm 2, 0.14±0.01, and (103.53±0.58)μm, respectively.The b-wave amplitude of dark-adapted 0.01 ERG was (66.75±7.29)μV.The a- and b-wave amplitudes of dark-adapted 3.0 ERG response were (57.15±15.01) and (122.10±25.51)μV, respectively.The a- and b-wave amplitudes, the amplitude of oscillation potentials, and the latency of dark-adapted 10.0 ERG response were (72.98±20.14)μV, (131.67±13.78)μV, (49.98±10.08)μV, and (30.02±5.76)ms, respectively.The a- and b-wave amplitudes of light-adapted 3.0 ERG were (9.16±2.75) and (40.43±5.57)μV, respectively.The latency and the amplitude of the light-adapted 30 Hz flicker was (26.61±1.19)ms and (24.72±5.10)μV, respectively.There was no significant difference in the parameters between left and right eyes (all at P>0.05). The retinal thickness in central fovea, mean RNFL thickness, waveform and amplitude of ERG of Macaca fascicularis were similar to normal human. Conclusions:The structure and function of the retina of adult Macaca fascicularis are similar to those of normal humans.As a laboratory animal for preclinical drug research, in vivo studies of Macaca fascicularis can refer to normal human retinal parameters.
3.Study on the spatial distribution and related factors of medical insurance designated retail pharmacies in Guiyang
Keren ZHANG ; Xun HE ; Xiaofan YAN ; Xing CUI ; Weike LIAO ; Wei ZHU
China Pharmacy 2022;33(16):1926-1930
OBJECTIVE To pr ovide theoretic support for Guiyang to scientifically guide the development of drug retail industry and implement national health policies . METHODS The data were collected through statistical yearbook ,data cloud , coordinate acquisition device of Application Programming Interface of Baidu map and so on. The spatial distribution characteristics and accessibility of medical insurance designated retail pharmacies (shorted for “designated pharmacies ”)in Guiyang were analyzed by spatial analysis based on Geographic Information System. The related factors for the distribution of designated pharmacies in Guiyang were analyzed by statistical method. RESULTS The number of designated pharmacies ,designated pharmacies per thousand people and designated pharmacies per 10 km2 in Guiyang increased from 2 018,0.41 and 2.51 in 2020 to 2 500,0.42 and 3.11 in 2021,with growth rates of 23.89%,2.44% and 23.90% respectively. The service area of the designated pharmacies that residents of Guiyang reached within 15 minutes on foot was 10.27% of the total service area of designated pharmacies in Guiyang. The results of correlation analysis showed that the correlation coefficients between the regional gross regional production ,total retail sales of consumer goods ,population,urban per capita disposable income and the number of designated pharmacies in Guiyang were 0.999,0.999,0.977 and 0.992,respectively (all P<0.05). CONCLUSIONS The distribution of designated pharmacies is insufficient in Guiyang ,the development of designated pharmacies in various administrative regions is uneven ,and the layout of pharmacies is significantly affected by economic and demographic factors. It is suggested that the local government should explore the strategy of scientifically and reasonably expanding the coverage of designated pharmacies in urban and rural areas,promote the rational layout of pharmacies with appropriate economic and demographic policies ,and pay attention to improving the service capacity of designated pharmacies ,so as to improve the quality of life of the people and guide the healthy and high-quality development of drug retail industry.