1.Clinical features of recompensation in autoimmune hepatitis-related decompensated cirrhosis and related predictive factors
Xiaolong LU ; Lin HAN ; Huan XIE ; Lilong YAN ; Xuemei MA ; Dongyan LIU ; Xun LI ; Qingsheng LIANG ; Zhengsheng ZOU ; Caizhe GU ; Ying SUN
Journal of Clinical Hepatology 2025;41(9):1808-1817
ObjectiveTo investigate the clinical features and outcomes of recompensation in patients with autoimmune hepatitis (AIH)-related decompensated cirrhosis, to identify independent predictive factors, and to construct a nomogram prediction model for the probability of recompensation. MethodsA retrospective cohort study was conducted among the adult patients with AIH-related decompensated cirrhosis who were admitted to The Fifth Medical Center of PLA General Hospital from January 2015 to August 2023 (n=211). The primary endpoint was achievement of recompensation, and the secondary endpoint was liver-related death or liver transplantation. According to the outcome of the patients at the end of the follow-up, the patients were divided into the recompensation group (n=16) and the persistent decompensation group(n=150).The independent-samples t test was used for comparison of normally distributed continuous data with homogeneity of variance, and the Mann-Whitney U rank sum test was used for comparison of non-normally distributed continuous data with heterogeneity of variance; the chi-square test or the Fisher’s exact test was used for comparison of categorical data between groups; the Kaplan-Meier method was used for survival analysis; the Cox proportional-hazards regression model was used to identify independent predictive factors, and a nomogram model was constructed and validated. ResultsA total of 211 patients were enrolled, with a median age of 55.0 years and a median follow-up time of 44.0 months, and female patients accounted for 87.2%. Among the 211 patients, 61 (with a cumulative proportion of 35.5%) achieved recompensation. Compared with the persistent decompensation group, the recompensation group had significantly higher white blood cell count, platelet count (PLT), total bilirubin (TBil), alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bile acid, prothrombin time, international normalized ratio (INR), SMA positive rate, Model for End-Stage Liver Disease (MELD) score, Child-Pugh score, and rate of use of glucocorticoids (all P0.05), as well as significantly lower age at baseline, number of complications, and death/liver transplantation rate (all P0.05). At 3 and 12 months after treatment, the recompensation group had continuous improvements in AST, TBil, INR, IgG, MELD score, and Child-Pugh score, which were significantly lower than the values in the persistent decompensation group (all P0.05), alongside with continuous increases in PLT and albumin, which were significantly higher than the values in the persistent decompensation group (P0.05). The multivariate Cox regression analysis showed that baseline ALT (hazard ratio [HR]=1.067, 95% confidence interval [CI]: 1.010 — 1.127, P=0.021), IgG (HR=0.463,95%CI:0.258 — 0.833, P=0.010), SMA positivity (HR=3.122,95%CI:1.768 — 5.515, P0.001), and glucocorticoid therapy (HR=20.651,95%CI:8.744 — 48.770, P0.001) were independent predictive factors for recompensation, and the nomogram model based on these predictive factors showed excellent predictive performance (C-index=0.87,95%CI:0.84 — 0.90). ConclusionAchieving recompensation significantly improves clinical outcomes in patients with AIH-related decompensated cirrhosis. Baseline SMA positivity, a high level of ALT, a low level of IgG, and corticosteroid therapy are independent predictive factors for recompensation. The predictive model constructed based on these factors can provide a basis for decision-making in individualized clinical management.
2. Retinal microstructure and developmental characteristics in Zebrafish
Li-Ping FENG ; Jun-Yong WANG ; Jin-Xing LIN ; Yi-Lin XU ; Xun CHEN ; Xiao-Ying WANG ; Yi-Lin XU ; Xun CHEN ; Xiao-Ying WANG ; Yi-Lin XU ; Xun CHEN ; Da-Hai LIU
Acta Anatomica Sinica 2024;55(1):105-112
Objective To study the microscopic structure and morphological characteristics of Zebrafish eyeball and retina at different developmental stages, and to lay a foundation for visual research model. Methods Select eight groups of zebrafish at different ages, with six fish in each group, 48 fish in total. Optical microscopy and transmission electron microscopy were used to observe the eyeball structure of Zebrafish at different developmental stages, and the thickness of retinal each layer was measured to analyze the temporal and spatial development pattern. The morphological characteristics of various cells in the retina and the way of nerve connection were observed from the microscopic and ultrastructural aspects, especially the structural differences between rod cells and cone cells. Results The retina of Zebrafish can be divided into ten layers including retinal pigment epithelial layer, rod cells and cone cells layer, outer limiting membrane, outer nuclear layer, outer plexiform layer, inner nuclear layer, inner plexiform layer, ganglion cell layer, nerve fiber layer, inner limiting membrane. Rod cells had a smaller nucleus and a higher electron density than cone cells. Photoreceptor terminals were neatly arranged in the outer plexiform layer, forming neural connections with horizontal cells and bipolar cells, and several synaptic ribbons are clearly visible within them. In Zebrafish retina, ganglion cell layer and inner plexiform layer are the earliest developed. With the growth and development of Zebrafish, the thickness of rod cells and cone cells layer and retinal pigment epithelial layer gradually increases, and the retinal structure was basically developed in about 10 weeks. Conclusion The retinal structure of Zebrafish is typical, with obvious stratification and highly differentiated nerve cells. There are abundant neural connections in the outer plexiform layer. The ocular development characteristics of Zebrafish are similar to those of most mammals.
3.Clinical Observation on the Acupuncture at Neiyingxiang Points Combined with Western Medicine in the Treatment of Allergic Rhinitis of Deficiency-Cold of Lung Qi Type
Jian HUANG ; Ying-Kai GAO ; Cun-Jun LIU ; Dian-Xun WANG ; Xin-Yue WANG ; Dan-Yang WU
Journal of Guangzhou University of Traditional Chinese Medicine 2024;41(4):944-950
Objective To observe the clinical efficacy of acupuncture at Neiyingxiang(EX-HN09)points combined with western medicine in the treatment of allergic rhinitis of deficiency-cold of lung qi type.Methods Sixty patients with deficiency-cold of lung qi type of allergic rhinitis were randomly divided into observation group and control group,with 30 patients in each group.The control group was treated with Desloratadine Tablets combined with Mometasone Furoate Aqueous Nasal Spray,and the observation group was treated with acupuncture at Neiyingxiang points combined with the self-made rhinitis recipe on the basis of the control group,and the clinical efficacy of the two groups was evaluated after 14 days.The changes of nasal symptom scores,Visual Analogue Scale(VAS)and rhinoconjunctivitis quality of life scores of the patients of the two groups were observed before and after the treatment.After 14 days of treatment,the clinical efficacy of the two groups was evaluated.The changes in nasal symptom scores,as well as VAS and rhinoconjunctivitis quality of life questionnaire(RQLQ)scores were observed before and after treatment.The changes in traditional Chinese medicine(TCM)sydnrome scores and serum immunoglobulin E(IgE)were compared before and after treatment in the two groups,and the safety of the two groups was evaluated.Results(1)The total effective rate of the observation group was 93.33%(28/30),and the control group was 73.33%(22/30).The efficacy of the observation group was superior to that of the control group,and the difference was statistically significant(P<0.05).(2)After treatment,the symptoms of nasal congestion,sneezing,runny nose and nasal itching were significantly improved in the two groups(P<0.01),and the observation group was significantly superior to the control group in improving nasal symptoms,and the differences were statistically significant(P<0.05).(3)After treatment,the VAS scores of patients in the two groups were significantly improved(P<0.01),and the observation group was superior to the control group in improving VAS scores,with statistically significant differences(P<0.05).(4)After treatment,the PQLQ scores of patients in the two groups improved significantly(P<0.01),and the observation group was significantly superior to the control group in improving the PQLQ scores,and the difference was statistically significant(P<0.05).(5)After treatment,the TCM syndrome scores of the patients in the two groups were significantly improved(P<0.01),and the observation group was significantly superior to the control group in improving TCM syndrome scores,with statistically significant differences(P<0.05).(6)After treatment,the serum IgE levels of patients in the two groups were significantly improved(P<0.01),and the observation group was significantly superior to the control group in improving serum IgE levels(P<0.05),with a statistically significant difference.(7)There was no significant difference in the incidence of adverse reactions between the observation group and the control group(P>0.05).Conclusion Acupuncture at Neiyingxiang points plus self-made rhinitis recipe combined with western medicine in the treatment of deficiency-cold of lung qi type of allergic rhinitis can significantly improve the clinical symptoms of the patients,thus improving the quality of life of the patients,and the therapeutic efficacy is remarkable.
4.Antimicrobial resistance of bacteria from blood specimens:surveillance re-port from Hunan Province Antimicrobial Resistance Surveillance System,2012-2021
Hong-Xia YUAN ; Jing JIANG ; Li-Hua CHEN ; Chen-Chao FU ; Chen LI ; Yan-Ming LI ; Xing-Wang NING ; Jun LIU ; Guo-Min SHI ; Man-Juan TANG ; Jing-Min WU ; Huai-De YANG ; Ming ZHENG ; Jie-Ying ZHOU ; Nan REN ; An-Hua WU ; Xun HUANG
Chinese Journal of Infection Control 2024;23(8):921-931
Objective To understand the change in distribution and antimicrobial resistance of bacteria isolated from blood specimens of Hunan Province,and provide for the initial diagnosis and treatment of clinical bloodstream infection(BSI).Methods Data reported from member units of Hunan Province Antimicrobial Resistance Survei-llance System from 2012 to 2021 were collected.Bacterial antimicrobial resistance surveillance method was imple-mented according to the technical scheme of China Antimicrobial Resistance Surveillance System(CARSS).Bacteria from blood specimens and bacterial antimicrobial susceptibility testing results were analyzed by WHONET 5.6 soft-ware and SPSS 27.0 software.Results A total of 207 054 bacterial strains were isolated from blood specimens from member units in Hunan Province Antimicrobial Resistance Surveillance System from 2012 to 2021,including 107 135(51.7%)Gram-positive bacteria and 99 919(48.3%)Gram-negative bacteria.There was no change in the top 6 pathogenic bacteria from 2012 to 2021,with Escherichia coli(n=51 537,24.9%)ranking first,followed by Staphylococcus epidermidis(n=29 115,14.1%),Staphylococcus aureus(n=17 402,8.4%),Klebsiella pneu-moniae(17 325,8.4%),Pseudomonas aeruginosa(n=4 010,1.9%)and Acinetobacter baumannii(n=3 598,1.7%).The detection rate of methicillin-resistant Staphylococcus aureus(MRSA)decreased from 30.3%in 2015 to 20.7%in 2021,while the detection rate of methicillin-resistant coagulase-negative Staphylococcus(MRCNS)showed an upward trend year by year(57.9%-66.8%).No Staphylococcus was found to be resistant to vancomy-cin,linezolid,and teicoplanin.Among Gram-negative bacteria,constituent ratios of Escherichia coli and Klebsiella pneumoniae were 43.9%-53.9%and 14.2%-19.5%,respectively,both showing an upward trend(both P<0.001).Constituent ratios of Pseudomonas aeruginosa and Acinetobacter baumannii were 3.6%-5.1%and 3.0%-4.5%,respectively,both showing a downward trend year by year(both P<0.001).From 2012 to 2021,resistance rates of Escherichia coli to imipenem and ertapenem were 1.0%-2.0%and 0.6%-1.1%,respectively;presenting a downward trend(P<0.001).The resistant rates of Klebsiella pneumoniae to meropenem and ertapenem were 7.4%-13.7%and 4.8%-6.4%,respectively,presenting a downward trend(both P<0.001).The resistance rates of Pseudomonas aeruginosa and Acinetobacter baumannii to carbapenem antibiotics were 7.1%-15.6%and 34.7%-45.7%,respectively.The trend of resistance to carbapenem antibiotics was relatively stable,but has de-creased compared with 2012-2016.The resistance rates of Escherichia coli to the third-generation cephalosporins from 2012 to 2021 were 41.0%-65.4%,showing a downward trend year by year.Conclusion The constituent ra-tio of Gram-negative bacillus from blood specimens in Hunan Province has been increasing year by year,while the detection rate of carbapenem-resistant Gram-negative bacillus remained relatively stable in the past 5 years,and the detection rate of coagulase-negative Staphylococcus has shown a downward trend.
5.Protocol for the Traditional Chinese Medicine Diagnosis and Treatment Guidelines for Children with Upper Airway cough Syndrome
Lingyun ZHANG ; Xiyou WANG ; Daxin LIU ; Qiang HE ; Xuefeng WANG ; Xun LI ; Yutong FEI ; Yi XIAO ; Xiaoxue LAN ; Yuanwen LIANG ; Xiaoxuan LIN ; Rong ZHOU ; Sirui GU ; Ying ZHANG ; Yue WANG ; Xingzhu YE ; Wenke LIU ; Hong CHEN ; Changhe YU
International Journal of Traditional Chinese Medicine 2024;46(8):961-966
In order to standardize the clinical diagnosis and treatment of upper airway cough syndrome (UACS) for children in China, Dongzhimen Hospital of Beijing University of Chinese Medicine and Affiliated Hospital of Liaoning University of Traditional Chinese Medicine initiated the development of this Traditional Chinese Medicine Diagnosis and Treatment Guidelines for Children with Upper Airway cough Syndrome based on evidence-based medical evidence. This guideline will process registration, write a plan, and develop relevant processes and writing norms, develop and publish official documents. This plan mainly introduces the scope of the guidelines, the purpose and significance, the composition of the guidelines working group, the management of conflicts of interest, the collection, selection and determination of clinical problems, the retrieval, screening and rating of evidence, and the consensus of recommendations. Registration information: This study has been registered in the international practice guidelines registry platform with the registration code of PREPARE-2023CN087.
6.Clinical Observation on the ZHU's Scalp Acupuncture Combined with Danzhi Xiaoyao San in the Treatment of Tinnitus of Liver Constraint Transforming into Fire Type
Xin-Yue WANG ; Ying-Kai GAO ; Cun-Jun LIU ; Dian-Xun WANG ; Jian HUANG ; Dan-Yang WU
Journal of Guangzhou University of Traditional Chinese Medicine 2024;41(8):2087-2093
Objective To observe the clinical efficacy of ZHU's scalp acupuncture combined with Danzhi Xiaoyao San in the treatment of tinnitus of liver constraint transforming into fire type.Methods A total of 70 patients with tinnitus of liver constraint transforming into fire type were randomly divided into treatment group and control group,35 cases in each group.The treatment group was treated with ZHU's scalp acupuncture combined with Danzhi Xiaoyao San,and the control group was treated with Yinxingye Tablets and Mecobalamin Tablets.The course of treatment was three weeks.After three weeks of treatment,the clinical efficacy of the two groups was evaluated,and telephone follow-up was conducted at three and six months after the end of treatment to evaluate the clinical efficacy.The changes of Tinnitus Evaluation Scale(TEQ)Score and Self-Rating Anxiety Scale(SAS)score were observed before and after treatment in the two groups.The changes of Tinnitus Handicap Inventory(THI)scores were compared before and after treatment between the two groups.The safety and adverse reactions of the two groups were evaluated.Results(1)After treatment,the total effective rate of the treatment group was 88.57%(31/35),and that of the control group was 62.86%(22/35),and the therapeutic efficacy of the treatment group was superior to that of the control group,and the difference was statistically significant(P<0.05).(2)After treatment,the TEQ,SAS,and THI scores of the two groups were significantly improved(P<0.01),and the treatment group was significantly superior to the control group in improving TEQ,SAS,and THI scores,and the differences were statistically significant(P<0.05).(3)At the 3-month follow-up after the end of treatment,the overall effective rate was 85.71%(30/35)in the treatment group and 60.00%(21/35)in the control group.At the 6-month follow-up after the end of treatment,the overall effective rate was 82.86%(29/35)in the treatment group and 54.29%(19/35)in the control group.At the 3-and 6-month follow-up after the end of treatment,the efficacy of the treatment group was superior to that of the control group,and the differences were statistically significant(P<0.05).(4)No obvious adverse reactions were seen in the two groups of patients,and the difference in the incidence of adverse reactions between the two groups was not statistically significant(P>0.05).Conclusion ZHU's scalp needling combined with Danzhi Xiaoyao San for the treatment of tinnitus of liver constraint transforming into fire type can significantly improve the tinnitus symptoms of patients,with high safety,no adverse reactions,and remarkable efficacy.
7.Improvement effect of Shegan Mahuang Decoction on rats with cold-induced asthma based on TRPV1/NRF-1/mtTFA pathway.
Qiu-Hui LI ; Xiao-Xiao SHAN ; Xiao-Ying LIU ; Wei-Dong YE ; Ya-Mei YUAN ; Xun-Yan YIN ; Xiang-Ming FANG
China Journal of Chinese Materia Medica 2023;48(23):6414-6422
This study investigated the therapeutic effect of Shegan Mahuang Decoction(SGMHD) on cold-induced asthma in rats and explored its underlying mechanism. Seventy-two healthy male SD rats of specific pathogen free(SPF) grade were randomly divided into a blank group, a model group, a positive control group(dexamethasone, 0.4 mg·kg~(-1)), and low-, medium-, and high-dose SGMHD groups(3.2, 6.4, and 12.8 g·kg~(-1)). The blank group received saline, while the other groups were sensitized by intraperitoneal injection of ovalbumin(OVA) solution. Subsequently, the rats were placed in a cold chamber adjustable to 0-2 ℃, and OVA solution was ultrasonically nebulized to induce cold-induced asthma in rats. After three weeks of treatment, the general behaviors of rats were observed. Hematoxylin-eosin(HE) staining was used to evaluate pathological changes in lung tissues, periodic acid-Schiff(PAS) staining assessed mucin changes, and Masson staining was performed to examine collagen deposition. Enzyme-linked immunosorbent assay(ELISA) was used to measure the levels of the inflammatory factors interleukin-4(IL-4) and vascular endothelial growth factor(VEGF) in serum and bronchoalveolar lavage fluid(BALF). Real-time quantitative polymerase chain reaction(RT-PCR) was employed to assess the mRNA expression levels of transient receptor potential vanilloid subfamily member 1(TRPV1), nuclear respiratory factor 1(NRF-1), and mitochondrial transcription factor A(mtTFA) in lung tissues. Western blot was used to measure the protein expression levels of TRPV1, NRF-1, and mtTFA in lung tissues. Compared with the blank group, the model group exhibited signs of rapid respiration, increased frequency of defecation with looser stools, and disheveled and dull fur. Pathological results showed significant infiltration of inflammatory cells in lung tissues, narrowing of bronchial lumens, increased mucin secretion, and enhanced collagen deposition in the model group. Additionally, the levels of IL-4 and VEGF in serum and BALF were significantly elevated, and the mRNA and protein expression levels of TRPV1, NRF-1, and mtTFA in lung tissues were significantly increased. Compared with the model group, SGMHD improved the behaviors of rats, alleviated pathological changes in lung tissues, mucin production, and collagen deposition, significantly decreased the levels of IL-4 and VEGF in serum and BALF, and reduced the mRNA expression levels of TRPV1, NRF-1, and mtTFA in lung tissues, with the medium-dose SGMHD group showing the most significant effect. Moreover, the protein expression levels of TRPV1, NRF-1, and mtTFA in lung tissues were also reduced, with the medium-dose SGMHD group exhibiting the most significant effect. In conclusion, this study demonstrates that SGMHD can alleviate airway inflammation and inhibit airway remodeling in cold-induced asthma rats. These effects may be associated with the modulation of the TRPV1/NRF-1/mtTFA signaling pathway.
Rats
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Male
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Animals
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Mice
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Interleukin-4/metabolism*
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Vascular Endothelial Growth Factor A/metabolism*
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Rats, Sprague-Dawley
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Asthma/genetics*
;
Lung
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Bronchoalveolar Lavage Fluid
;
RNA, Messenger/metabolism*
;
Collagen/metabolism*
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Mucins/therapeutic use*
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Ovalbumin
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Disease Models, Animal
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Mice, Inbred BALB C
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TRPV Cation Channels/metabolism*
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Drugs, Chinese Herbal
8.Puerarin inhibits inflammation and lipid accumulation in alcoholic liver disease through regulating MMP8.
Ying HU ; Shuxian WANG ; Lan WU ; Kai YANG ; Fan YANG ; Junfa YANG ; Shuang HU ; Yan YAO ; Xun XIA ; Yixin LIU ; Li PENG ; Jihong WAN ; Chuanpu SHEN ; Tao XU
Chinese Journal of Natural Medicines (English Ed.) 2023;21(9):670-681
Alcoholic liver disease (ALD) is a growing global health concern, and its early pathogenesis includes steatosis and steatohepatitis. Inhibiting lipid accumulation and inflammation is a crucial step in relieving ALD. Evidence shows that puerarin (Pue), an isoflavone isolated from Pueraria lobata, exerts cardio-protective, neuroprotective, anti-inflammatory, antioxidant activities. However, the therapeutic potential of Pue on ALD remains unknown. In the study, both the NIAAA model and ethanol (EtOH)-induced AML-12 cell were used to explore the protective effect of Pue on alcoholic liver injury in vivo and in vitro and related mechanism. The results showed that Pue (100 mg·kg-1) attenuated EtOH-induced liver injury and inhibited the levels of SREBP-1c, TNF-α, IL-6 and IL-1β, compared with silymarin (Sil, 100 mg·kg-1). In vitro results were consistent within vivo results. Mechanistically, Pue might suppress liver lipid accumulation and inflammation by regulating MMP8. In conclusion, Pue might be a promising clinical candidate for ALD treatment.
9.Application of high-resolution MRI of the basilar artery in patients with isolated pontine infarction
Qinfeng SUN ; Ying LIU ; Ju QIAN ; Dandan JIA ; Xun WANG ; Tingting ZHAO ; Yan ZHANG
International Journal of Cerebrovascular Diseases 2023;31(6):440-444
Isolated pontine infarction (IPI) is the main type of acute brainstem infarction. Due to the application of high-resolution MRI, the research on the etiology of IPI has gradually increased in recent years. This article reviews the latest research progress on the characteristics of basilar artery plaques and disease progression mechanisms of IPI, aiming to provide reference for the etiology research of IPI.
10.Inhibitory effects of 1% atropine on form deprivation-induced myopia development in guinea pigs and its mechanism
Xiaowen JI ; Boteng GONG ; Ying ZHU ; Daqian LU ; Lin LIU ; Bei DU ; Xun LIU ; Ruihua WEI
Chinese Journal of Experimental Ophthalmology 2023;41(4):303-311
Objective:To observe the prevention and control effect of 1% atropine on the progression of form deprivation myopia (FDM) in guinea pigs and the potential biological mechanism.Methods:Sixty-nine 3-week-old tricolor guinea pigs with normal refraction were randomly divided into a normal control group ( n=19), a FDM group ( n=19), a FDM+ atropine group ( n=19), and an atropine group ( n=12). No intervention was given to guinea pigs in normal control group.The FDM model was established by covering the right eye of guinea pigs with a semitransparent latex facemask for 4 weeks in FDM and FDM+ atropine groups.For the FDM+ atropine group, 1% atropine gel was topically administered to the form-deprived right eyes once a day for 4 weeks.For the atropine group, the right eye was treated with 1% atropine gel once a day for 4 weeks.Refraction and axial length of guinea pigs were measured by retinoscopy and ophthalmic A-scan ultrasonography respectively at baseline, experiment week 2 and week 4.In experiment week 4, eyeballs were enucleated to make sections via the paraffin wax processing procedure, and the microstructural and ultrastructural changes of the sclera were observed under the light microscope and transmission electron microscope, respectively.The isobaric tags for relative and absolute quantitation labeling combined with liquid chromatography-tandem mass spectrometry were used to identify the differentially expressed proteins.Use and care of the animals complied with the Regulation for the Administration of Affairs Concerning Experiment Animals by State Science and Technology Commission.The study protocol was approved by the Institutional Animal Care and Use Committee of Tianjin Medical University (No.TJYY2020111028). Results:There were statistically significant differences in the diopter of guinea pigs at different time points among the four groups ( Fgroup=138.892, P<0.001; Ftime=167.270, P<0.001). Compared with normal control group, the diopter of guinea pigs in FDM group at experiment weeks 2 and 4, and FDM+ atropine group at experiment week 4 developed toward myopia, showing statistically significant differences (all at P<0.001). Compared with FDM group, the diopter of guinea pigs in FDM+ atropine group at experiment weeks 2 and 4 developed toward hyperopia, showing statistically significant differences (both at P<0.001). There were statistically significant differences in the axial length of guinea pigs at different time points among the four groups ( Fgroup=32.346, P<0.001; Ftime=353.797, P<0.001). The axial lengths of FDM group at experiment weeks 2 and 4 and FDM+ atropine group at experiment week 4 were longer than those of normal control group, and the axial lengths in FDM+ atropine group at experiment weeks 2 and 4 were shorter than those in FDM group, and the differences were statistically significant (all at P<0.001). The collagenous fibers of posterior sclera of guinea pigs were loose and disordered in FDM group, and were regular in FDM+ atropine group.The posterior scleral thickness of normal control group, FDM group, FDM+ atropine group and atropine group was (141.74±16.98), (101.46±9.15), (112.74±6.24) and (134.30±18.19) μm, respectively, with a statistically significant difference ( F=6.709, P=0.005). The posterior sclera was significantly thinner in FDM group than in normal control group and FDM+ atropine group (both at P<0.05). The diameter of posterior scleral collagen fiber gradually increased from inside to outside in normal control group, FDM+ atropine group and atropine group, and the diameters of the inner, middle and outer posterior scleral collagen fibers were smaller in FDM group than in normal control group.Proteomic analysis revealed 85 differentially expressed proteins (fold change>1.30) between FDM group and normal control group, FDM+ atropine group and FDM group, of which 38 were up-regulated and 47 were down-regulated after atropine treatment.Gene Ontology enrichment analysis showed that biological processes mainly involved were biological regulation, cell process, localization and metabolic process.Molecular function mainly involved were binding, catalytic activity, molecular function regulator, structural molecule activity and transporter activity.Cell components mainly involved were in cellular anatomical entity, intracellular and protein-containing complex. Conclusions:Atropine can increase the diameter of scleral collagen fibers in guinea pigs of FDM model, improve the arrangement of scleral collagen fiber, inhibit scleral thinning.The mechanism of atropine to control myopia progression is closely related to the tight junction between scleral cells, cytoskeleton and extracellular matrix remodeling.

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