AIM: To compare the difference between the actual cutting amount and the preoperative predicted amount of corneal stroma after the small incision lenticule extraction(SMILE), and evaluate the predictability and accuracy of SMILE for corneal stroma.

METHODS: Prospective study. A total of 113 myopic patients(220 eyes)who had taken SMILE in the Affiliated Hospital of Yunnan University were selected, and routine examinations were carried out before and 1,3mo after operation, including visual acuity, non-contact tonometer(NCT), spherical equivalents(SE), mean corneal curvature, spherical coefficient of anterior corneal surface and Pentacam anterior segment analysis. All the 102 eyes in the research objects were randomly selected to measure the central corneal thickness(CCT)with the A-supersonic cornea thickness gauge before and 3mo after operation. The actual cutting amount after operation is the difference between the thickness of the thinnest spot of the cornea before and after operation, and the error amount is the difference between the predicted cutting amount before operation and the actual cutting amount after operation. The cutting error amount was observed and its correlation with physiological parameters before operation was analyzed.

RESULTS: SMILE had a good performance and the corneal morphology and visual acuity were relatively stable 1 and 3mo after operation. The consistency was good between the data measured by the A-supersonic cornea thickness gauge and the data of the thinnest spot of the cornea in the Pentacam anterior segment analysis, where the difference had no statistical significance(t= -1.877, P=0.063). The difference between the predicted cutting amount before operation(101.36±18.91)μm, and the actual cutting amount 1mo after operation(88.89±18.69)μm and 3mo after operation(84.95±18.64)μm(F=334.65, P<0.01)had statistical significance; There was statistical difference between the cutting amount 1 and 3mo after operation, and the predicted errors before operation \〖(12.59±9.78)μm and(16.50±9.21)μm\〗. The cutting amount errors were only correlated with the preoperative equivalent diopter(r=0.299, P<0.01)and(r=0.305, P<0.01). The equivalent diopter at 1 and 3mo after operation was correlated with the cutting amount error at the same time(r=-0.275, P<0.01)(r= -0.306, P<0.01). With the increase of the cutting amount error, the postoperative spherical equivalent shifted to negative.

CONCLUSION: The actual cutting amount of corneal stroma after SMILE is smaller than the predicted preoperative cutting amount, and the predicted cutting amount error increases with the increase of preoperative diopter. As the cutting amount error increases, postoperative diopter gradually shifted to negative. The error, however, does not influence the target's visual acuity in the early postoperative period.

China was certificated malaria-free by WHO in 2021 and has continued to maintain malaria elimination. However, there are still huge challenges in malaria control in the border regions between Yunnan Province, China and Myanmar due to lack of geographic barriers and frequent cross-border travel. Hereby, we review the direction contributions of the Global Fund Malaria Program implemented by Health Poverty Action (HPA), an international non-governmental organization (NGO), to malaria elimination in China, and analyze the challenges of malaria control caused by external environmental factors, such as COVID-19, in regions where the Global Fund Malaria Program is implemented. In addition, some suggestions are proposed for cross-border collaboration on malaria control.

OBJECTIVE: To analyze the RHD genotype of a blood donor with Del phenotype in Yunnan. METHODS: Rh serological phenotype was identified. RHD gene was detected by PCR-SSP typing, and its 10 exons were sequenced. Exon 9 was amplified for sequencing and analysis. RHD zygosity was detected. RESULTS: The Rh phenotype of this specimen was CcD^elee. Genomic DNA exhibited a 1 003 bp deletion spanning from intron 8, across exon 9 into intron 9. The deletion breakpoints occurred between two 7-bp short tandem repeat sequences. There was no variation in the sequences of the remaining exons. The Rh hybridization box test showed that there was one RHD negative allele. CONCLUSION This specimen is Del type caused by deletion of RHD exon 9.
Humans ; Blood Donors ; Rh-Hr Blood-Group System/genetics* ; China ; Phenotype ; Exons ; Genotype ; Alleles

OBJECTIVE: To explore the mediating role of doctor-patient relationship between occupational stress and job burnout of medical staffs involved in the prevention and treatment of patients with acquired immune deficiency syndrome(AIDS) and the regulating role of personality traits. METHODS: A total of 346 medical staffs who are involved in AIDS prevention and treatment from 29 antiviral treatment sites in Yunnan Province were selected as the study subjects using convenience sampling method. The Questionnaire of Doctor-Patient Interaction, Subscale of Feeling Stress, Questionnaire of Chinese Job Burnout, and China′s Big Five Personality Questionnaire(short version) were used to investigate these subjects. The mediating-regulating model was tested with the Process program. RESULTS: The total scores of doctor-patient relationship, occupational stress, personality traits and job burnout were(43.6±9.2),(153.1±29.5),(156.2±17.9) and(67.7±16.8), respectively. The job burnout was associated with doctor-patient relationship and occupational stress(correlation coefficients were-0.31 and 0.24, respectively, all P<0.05). Occupational stress had a direct effect on job burnout(P<0.01). The doctor-patient relationship had a mediating effect between occupational stress and job burnout(P<0.05), which accounted for 13.1% of the total effect. It was regulated by open personality traits(P<0.01). CONCLUSION: The doctor-patient relationship has a mediating effect between the occupational stress and job burnout of the medical staffs engaged in AIDS prevention and treatment, and the open personality traits plays a moderating role.

Gene editing technology is a genetic operation technology that can modify the DNA sequence at the genomic level. The precision gene editing technology based on CRISPR/Cas9 system is a gene editing technology that is easy to operate and widely used. Unlike the traditional CRISPR/Cas9 system, the precision gene editing technology can perform site-directed mutation of genes without DNA template. This review summarizes the recent development of precision gene editing technology based on CRISPR/Cas9, and prospects the challenges and opportunities of this technology.
Gene Editing ; CRISPR-Cas Systems/genetics* ; Mutation ; Genome

OBJECTIVE： To determine and compare the contents of catalpol and aucubin in different parts （root， stem， leaf and flower） of wild Centranthera grandiflora， and to provide reference for the selection of medicinal parts and source development. METHODS： HPLC method was used to determine the contents of catalpol and aucubin in root， stem， leaf and flower of wild C. grandiflora， and the contents of different parts were analyzed comparatively. The determination of catalpol was performed on Agilent TC-C18 column with mobile phase consisted of methanol-0.1％ phosphoric acid （1 ∶ 99， V/V） at the flow rate of 1 mL/min； the detection wavelength was set at 210 nm， and sample size was 20 μL. The column temperature was 35 ℃； the determination of aucubin was performed on SPHERI-5RP-C18 column with mobile phase consisted of acetonitrile-water （3 ∶ 97， V/V） at the flow rate of 1 mL/min； the detection wavelength was set at 205 nm， and sample size was 20 μL； the column temperature was 25 ℃. RESULTS： The linear range of catalpol and aucubin were 0.061 5-3.321 and 0.000 36-0.216 mg/mL （all r＝0.999 9）. The limits of detection were 0.016 and 0.007 μg/mL. The limits of quantitation were 0.052 and 0.023 μg/mL. RSDs of precision， stability （24 h） and reproducibility tests were all lower than 2.00％ （n＝6）. The average recoveries were 99.34％ and 99.61％， and RSDs were 1.06％ and 1.12％， respectively （n＝6）. The average content of catalpol in root， stem， leaf and flower wild C. grandiflora were 1.609， 3.030， 11.095 and 1.921 mg/g， respectively. The contents of aucubin in different parts were 0.441， 0.020， 0.005 and 0.006 mg/g，respectively. CONCLUSIONS：The established HPLC method meets the requirements of quantitative analysis. Catalpol is mainly distributed in the leaves of wild C. grandiflora， and aucubin is mainly distributed in the roots of wild C. grandiflora. The experimental conclusion provides a reference for the reasonable selection of different medicinal parts as raw materials to develop medicine with different efficacy.

The present article reviews the progress in the experimental studies of traditional Chinese medicine for benign prostatic hyperplasia (BPH) in the recent years. Traditional Chinese medicine can inhibit prostatic hyperplasia, after the growth factor of prostate cell proliferation, regulate nerves and endocrine, and act on the kinetic factor (alpha-receptor) and static factor (augmented prostate) of BPH formation. We also investigate the selection of the animal model of prostatic hyperplasia. It has certain directive effect to further discover the action mechanism of traditional Chinese medicine in the treatment of BPH.
Animals ; Disease Models, Animal ; Dogs ; Drugs, Chinese Herbal ; therapeutic use ; Humans ; Male ; Mice ; Phytotherapy ; Prostatic Hyperplasia ; drug therapy ; Rats

Objective: The SSR loci information in the transcriptome of Panax vietnamensis var. fuscidiscus (PVF) was analyzed in this study to provide more powerful tools for molecular marker-assisted breeding in this plant. Methods: Simple sequence repeats (SSR) loci were searched in all 126 758 unigenes by using MISA. SSR loci information was analized and SSR primers were designed by Primer3. Furthermore, 30 pairs of primers were randomly selected for the polymorphic analysis on 13 PVF plants collected from different habitats. Results: A total of 21 320 SSRs were found in the transcriptome of PVF, distributed in 17 780 unigenes with the distribution frequency of 16.82%. Di-nucleotide repeat was the main type, accounted for as much as 52.52% of all SSRs, followed by tri-nucleotide repeat motif (28.08%). The dinucleotide repeat motifs of AG/CT and AT/AT were the predominant repeat types (46.25%). Using Primer3, a total of 39 336 pairs of SSR primers were designed. For validating the availability of those SSR primers, we randomly selected 30 pairs of primers for PCR amplification. Among them, 29 pairs of primers (96.67%) produced clear and reproductive bands, 15 pairs of primers (50.00%) showed polymorphism, and 13 PVF plants were divided into two groups by UPGMA. Conclusion: There are numerous SSRs in PVF transcriptome with high frequency and various types, this will provide the abundant candidate molecular markers for genetic diversity study and genetic map for this plant.

AIM: To analyze the strabismus surgery situation of adolescents and children in Yunnan province.METHODS: A retrospective analysis was conducted on medical records data of 3 068 adolescents and children who received strabismus surgery at Affiliated Hospital of Yunnan University from January 2017 to December 2021. The analysis included gender, constituent ratio of age, distribution of strabismus types and combination with other ocular diseases, etc.RESULTS: Among the included patients, 52.12% were males, and 47.88% were females. Preschool patients(1 to 6 years old)accounted for 32.89%, primary pupils(7 to 12 years old)accounted for 45.89% and high school students(13 to 18 years old)accounted for 21.22%. Exotropia accounted for 63.17% of the total strabismus, of which intermittent exotropia was the most common type. Esotropia accounted for 19.69%, and concomitant esotropia was the most common type. The special type of strabismus accounted for 17.14%, and A-V syndrome and dissociative vertical deviation(DVD)were the most common types. Strabismus combined with ametropia accounted for 61.02% and amblyopia accounted for 10.89%. A few patients also combined with other eye diseases.CONCLUSION: In Yunnan province, intermittent exotropia was the most common type of strabismus among adolescents and children. Some patients combined with other ocular diseases.

Objective To investigate the morphological variation of Oncomelania hupensis shells in Yunnan Province, so as to provide insights into the understanding of O. hupensis genetic evolution and control. Methods According to the O. hupensis density, geographical location, altitude, water system and environmental type, 12 administrative villages were sampled from 10 schistosomiasis-endemic counties (districts) in 3 prefectures (cities) of Yunnan Province as snail collection sites. From December 2021 to January 2022, about 200 snails were collected from each collection site, among which thirty adult snails (6 to 7 spirals) were randomly selected from each site, and the 11 morphological indexes of snail shells were measured and subjected to cluster analysis and principal component analysis. Results Of O. hupensis snails from 12 localities of Yunnan Province, the longest shell (7.33 mm) was detected in snails from Yongle Village, Eryuan County, with the shortest (4.68 mm) in Dongyuan Village, Gucheng District, and the largest angle of apex (59.47°) was measured in snails from Caizhuang Village, Midu County, with the smallest (41.40°) in Qiandian Village, Eryuan County. The mean coefficient of variation was 9.075% among O. hupensis snails from 12 localities of Yunnan Province, with the largest coefficient of variation seen in the thickness of the labra brim (29.809%). Among O. hupensis snails from 12 localities of Yunnan Province, the mean Euclidean distance was 2.26, with the shortest Euclidean distance seen between O. hupensis snails from Qiandian Village of Eryuan County and Wuxing Village of Dali City (0.26), and the largest found between O. hupensis snails from Caizhuang Village of Midu County and Cangling Village of Chuxiong County (8.17). Cluster analysis and principal component analysis classified O. hupensis snails from 12 localities of Yunnan Province into three categories, including the O. hupensis snail samples from Caizhuang Village of Midu County, O. hupensis snail samples from Cangling Village of Chuxiong County, and O. hupensis snail samples from Qiandian Village of Eryuan County, Wuxing Village of Dali City, Yangwu Village of Yongsheng County, Xiaoqiao Village of Xiangyun County, Yongle Village of Eryuan County, Xiaocen Village of Dali City, Anding Village of Nanjian County, Dongyuan Village of Gucheng District, Lianyi Village of Heqing County, and Dianzhong Village of Weishan County. The variations in these three categories of snail samples were mainly measured in the principal component 2 related to the angle of apex and the thickness of the labra brim. Conclusions The variations in the Euclidean distance and morphological features of shells of O. hupensis from 12 localities of Yunnan Province gradually rise with the decrease in the latitude of the collection sites. The angle of apex is an indicator for the growth of O. hupensis whorl.