OBJECTIVE To provide a scientific basis for the quality evaluation and clinical application of Qingwen hufei granules. METHODS Fourteen batches of Qingwen hufei granules were used as samples to establish high-performance liquid chromatography （HPLC） fingerprints using the Similarity Evaluation System for Chromatographic Fingerprint of Traditional Chinese Medicine （2012 Edition）. The chromatographic peaks were identified and the similarity was evaluated. Cluster analysis （CA）， principal component analysis （PCA）， and orthogonal partial least squares-discriminant analysis （OPLS-DA） were used to conduct chemical pattern recognition analysis on the 14 batches of samples. Meanwhile， the contents of neochlorogenic acid （NGA）， chlorogenic acid （CHA）， cryptochlorogenic acid （CGA）， forsythoside A （FTA）， 3，5-O-dicaffeoylquinic acid （3，5-O- DA）， 4，5-O-dicaffeoylquinic acid （4，5-O-DA）， and angoroside C （AGC） in the samples were determined by HPLC. RESULTS The methodological investigation results of both the fingerprint and the content determination complied with the relevant requirements. Fourteen common peaks were indicated in the HPLC fingerprints of the 14 batches of samples， and 7 of them were identified [NGA （peak 2）， CHA （peak 3）， CGA （peak 5）， FTA （peak 11）， 3，5-O-DA （peak 12）， 4，5-O-DA （peak 13）， and AGC （peak 14）]； the similarity of each sample was greater than 0.94. The results of CA and PCA showed that the samples could be classified into 3 categories； the results of OPLS-DA indicated that peak 4 （unknown）， peak 11 （FTA）， peak 8 （unknown）， peak 9 （unknown）， and peak 1 （unknown） were the differential components. The content ranges of NGA， CHA， CGA， 3，5-O-DA， FTA， 4，5-O-DA and AGC in the 14 batches of samples were 0.210 4-0.458 7， 0.269 1-0.506 3， 0.228 1-0.461 1， 0.443 9-1.044 6， 0.066 7-0.155 7， 0.062 8-0.143 8， and 0.057 4-0.105 7 mg/g， respectively. CONCLUSIONS The HPLC fingerprint and multi-component content determination methods established in this study are efficient and reliable， and can be used for the quality evaluation of Qingwen hufei granules.

Objective:To explore the effect and mechanism of myricetin(Myr)on trinitrobenzenesulfonic acid(TNBS)-in-duced inflammatory bowel disease(IBD)in rats.Methods:IBD rat models were established and separated into Control group,Model group,low,medium and high dose Myr[28 mg/(kg·d),Myr-L,56 mg/(kg·d),Myr-M,112 mg/(kg·d),Myr-H]groups.The dis-ease activity index(DAI)of rats was scored.Immune function indicators and colon length were measured;reagent kits were applied to measure the levels of IL-6,IL-17A,TNF-α and cAMP in serum.MPO optical density values in colon tissue was detected.HE staining was applied to observe pathological changes in colon tissue.Flow cytometry was applied to determine the proportion of Treg cells.Results:Compared with the control group,the colon tissue cells in the model group were disordered in arrangement,with a large num-ber of inflammatory cell infiltrations,obvious ulcer phenomena,a large number of cell necrosis,mucosal edema and thickening of the colon wall,DAI score,IL-6,IL-17A and TNF-α levels,spleen index,thymus index and MPO optical density value was increased sig-nificantly(P<0.05),colon length,cAMP level and the proportion of Treg cells were significantly decreased(P<0.05).Compared with the model group,the colonic tissue cells in the low-dose,medium-dose and high-dose Myr groups of rats were arranged more neatly,cAMP membrane edema and colonic wall thickening were alleviated,and inflammatory cell infiltration,cell necrosis and ulceration phenomena were reduced,DAI score,levels of IL-6,IL-17A and TNF-α,spleen index,thymus index,and MPO optical density val-ue were gradually decreased(P<0.05),while the colon length,cAMP level,and the proportion of Treg cells were significantly in-creased(P<0.05).Conclusion:Myr may inhibit inflammation levels,regulate immune function,and exert protective effects on IBD rats.

Autophagy-lysosomal pathway (ALP) is the degradation system that remove unfolded proteins and damaged organelles in cells, and plays an important role in maintaining intracellular homeostasis.The process of autophagy mainly includes autophagosome formation, autophagosome-lysosome fusion, and degradation of cargoes in mature lysosomes by lysosomal enzymes.Dry eye disease, meibomian gland dysfunction and keratopathy are common ocular surface diseases associated with diabetes mellitus, and clinical manifestations include dry eyes, reduced tear secretion, persistent corneal epithelial defects, neuropathy (decreased corneal sensitivity) and endothelial cell dysfunction.Aberrant expression of gene, oxidative stress and inflammation related advanced glycosylation end products and reactive oxygen species are significant pathogenesis of ocular surface diseases related to diabetes.Moreover, the above pathogenesis involves defects of autophagy regulatory gene, abnormal expression of autophagy related protein and activation of autophagy signaling pathway which lead to the defects of ALP such as autophagosome lysosome fusion disorder, accumulation of cargoes and abnormal lysosomal function, and the deficiency of autophagy further promoting the oxidative stress and release of inflammatory factors.The occurrence and development of ocular surface diseases associated with diabetes are closely related to the defects of ALP.This article reviews the basic research status between the defects of ALP and diabetic ocular surface diseases to provide new ideas for the mechanism and treatment research.

Objective:To evaluate the efficacy of early bronchoalveolar lavage using electronic bronchoscopy in pediatric drowning cases.Methods:A retrospective analysis of clinical data from 81 pediatric drowning cases treated in the intensive care unit of Hunan Children's Hospital from January 2017 to September 2023 was conducted.Among these,43 cases underwent bronchoalveolar lavage with electronic bronchoscopy within 24 hours of drowning,constituting the treatment group,while 38 cases either did not receive treatment within 24 hours or underwent the procedure after 24 hours,forming the control group.We compared the two groups regarding pre-admission observations,admission observations,and disease progression or prognosis indicators to assess the clinical efficacy of early bronchoalveolar lavage with electronic bronchoscopy in pediatric drowning cases.Results:Compared to the control group,children in the treatment group exhibited a significant reduction in invasive ventilation time [(73.33±13.33) h vs.(94.82±15.77) h] and a significant decrease in pediatric intensive care unit stay [105.00 (94.00,121.00) h vs.123.5 (109.75,149.00) h],with both differences being statistically significant( P<0.05).No significant differences in white blood cell count and neutrophil percentage were observed between the treatment group and control group at admission and on the first day( P>0.05).However,by the third day,there was a significant improvement in white blood cell count in both groups,with statistical significance( P<0.05).There was a significant decrease in C-reactive protein and procalcitonin levels between the treatment group and control group on the 1st and 3rd days,with the differences being significant( P<0.05).Six hours after electronic bronchoalveolar lavage,the P/F ratio in the treatment group was lower than that in the control group (177.09±41.27 vs. 233.50±48.23),but it increased more significantly at 24 hours (286.00±34.32 vs.256.34±44.22),with a significant difference between two groups.The positive rate of lavage fluid culture in the treatment group was significantly higher than that in the control group,and the difference was statistically significant( P<0.05).There was no significant difference in the number of organ function damage between two groups( P>0.05).However,regarding prognosis,the treatment group showed significantly better outcomes than the control group( P<0.05). Conclusion:For pediatric patients with wilderness drowning,early electronic bronchoscopy with alveolar lavage may shorten the duration of invasive mechanical ventilation and pediatric intensive care unit stay,improving prognosis,and is worth promoting.

Autophagy-lysosomal pathway (ALP) is the degradation system that remove unfolded proteins and damaged organelles in cells, and plays an important role in maintaining intracellular homeostasis.The process of autophagy mainly includes autophagosome formation, autophagosome-lysosome fusion, and degradation of cargoes in mature lysosomes by lysosomal enzymes.Dry eye disease, meibomian gland dysfunction and keratopathy are common ocular surface diseases associated with diabetes mellitus, and clinical manifestations include dry eyes, reduced tear secretion, persistent corneal epithelial defects, neuropathy (decreased corneal sensitivity) and endothelial cell dysfunction.Aberrant expression of gene, oxidative stress and inflammation related advanced glycosylation end products and reactive oxygen species are significant pathogenesis of ocular surface diseases related to diabetes.Moreover, the above pathogenesis involves defects of autophagy regulatory gene, abnormal expression of autophagy related protein and activation of autophagy signaling pathway which lead to the defects of ALP such as autophagosome lysosome fusion disorder, accumulation of cargoes and abnormal lysosomal function, and the deficiency of autophagy further promoting the oxidative stress and release of inflammatory factors.The occurrence and development of ocular surface diseases associated with diabetes are closely related to the defects of ALP.This article reviews the basic research status between the defects of ALP and diabetic ocular surface diseases to provide new ideas for the mechanism and treatment research.

Objective:To explore the effect and mechanism of myricetin(Myr)on trinitrobenzenesulfonic acid(TNBS)-in-duced inflammatory bowel disease(IBD)in rats.Methods:IBD rat models were established and separated into Control group,Model group,low,medium and high dose Myr[28 mg/(kg·d),Myr-L,56 mg/(kg·d),Myr-M,112 mg/(kg·d),Myr-H]groups.The dis-ease activity index(DAI)of rats was scored.Immune function indicators and colon length were measured;reagent kits were applied to measure the levels of IL-6,IL-17A,TNF-α and cAMP in serum.MPO optical density values in colon tissue was detected.HE staining was applied to observe pathological changes in colon tissue.Flow cytometry was applied to determine the proportion of Treg cells.Results:Compared with the control group,the colon tissue cells in the model group were disordered in arrangement,with a large num-ber of inflammatory cell infiltrations,obvious ulcer phenomena,a large number of cell necrosis,mucosal edema and thickening of the colon wall,DAI score,IL-6,IL-17A and TNF-α levels,spleen index,thymus index and MPO optical density value was increased sig-nificantly(P<0.05),colon length,cAMP level and the proportion of Treg cells were significantly decreased(P<0.05).Compared with the model group,the colonic tissue cells in the low-dose,medium-dose and high-dose Myr groups of rats were arranged more neatly,cAMP membrane edema and colonic wall thickening were alleviated,and inflammatory cell infiltration,cell necrosis and ulceration phenomena were reduced,DAI score,levels of IL-6,IL-17A and TNF-α,spleen index,thymus index,and MPO optical density val-ue were gradually decreased(P<0.05),while the colon length,cAMP level,and the proportion of Treg cells were significantly in-creased(P<0.05).Conclusion:Myr may inhibit inflammation levels,regulate immune function,and exert protective effects on IBD rats.

Objective: To analyze the temporal variation patterns of sickness absenteeism among primary and secondary school students in Shanghai, so as to explore models suitable for predicting peaks and intensity of absenteeism rates. Methods: The seasonal and trend decomposition using loess (STL) method was used to analyze the seasonal and long term trend changes in sickness absenteeism among primary and secondary school students from September 1 in 2010 to June 30 in 2018, in Shanghai. A hierarchical clustering method based on Dynamic Time Warping (DTW) was employed to classify absenteeism symptoms with similar temporal patterns. Based on historical data, the study constructed and evaluated different time series algorithms and machine learning models to optimize the accuracy of predicting the trend of sickness absenteeism. Results: During the research period, the average new absenteeism rate due to illness was 16.86 per 10 000 person day for every academic year, and the trend of sickness absenteeism exhibited both seasonality and a long term upward trend, reaching its highest point in the 2017 academic year (22.47 per 10 000 person day). The symptoms of absenteeism were divided into three categories: high incidence in winter and spring (respiratory symptoms, fever and general discomfort, etc.), high incidence in summer (eye symptoms, nosebleeds, etc.) and those without obvious seasonality (skin symptoms, accidental injuries, etc.).The constructed time series models effectively predicted the trend of absenteeism due to illness, although the accuracy of predicting peak intensity was relatively low. Among them, the multi layer perceptron (MLP) model performed the best, with an root mean squared error (RMSE) of 8.96 and an mean absolute error (MAE) of 4.37, reducing 36.51% and 39.02% compared to the baseline model. Conclusion Time series models and machine learning algorithms could effectively predict the trend of sickness absenteeism, and corresponding prevention and control measures can be taken for absenteeism caused by different symptoms during peak periods.

Biosynthesized selenium nanoparticles (SeNPs) have attracted much attention because of their unique physical, chemical, and biological properties. The microbial reduction of selenium salts to SeNPs has great potential, while there is a lack of elite strains. In this study, we explored the reduction of Na₂SeO₃ by Streptomyces avermitilis into SeNPs. The colonies and hyphae of the strain and the synthesized SeNPs were characterized by optical microscopy, scanning electron microscopy (SEM), transmission electron microscope (TEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). At the same time, the inhibitory activity of SeNPs on Fusarium oxysporum, the main pathogen causing root rot of Lycium barbarum, was studied. The results showed that S. avermitilis converted Na₂SeO₃ into SeNPs and tolerated 300 mmol/L Na₂SeO₃, demonstrating strong tolerance. S. avermitilis synthesized spherical SeNPs in the cytoplasm, and most of SeNPs had a diameter of about 100 nm and were released by hyphal fracture. The SeNPs synthesized by S. avermitilis were amorphous, and their surfaces were dominated by C and Se, with the existence of O, N and other elements. SeNPs had functional groups such as -OH, C=O, C-N, and C-H, which were closely related to the stability and biological activity of SeNPs. The SeNPs synthesized by S. avermitilis showcased significant inhibitory activity on F. oxysporum, and 25.0 μmol/mL SeNPs showcased the inhibition rate of 77.61% and EC₅₀ of 0.556 μmol/mL. In conclusion, S. avermitilis can tolerate high Na₂SeO₃ stress and mediate the synthesis of SeNPs. The synthesized SeNPs have good stability and strong inhibitory activity, demonstrating the potential application value in the preparation of SeNPs and the control of L. barbarum root rot.
Streptomyces/metabolism* ; Fusarium/drug effects* ; Lycium/microbiology* ; Selenium/metabolism* ; Nanoparticles/chemistry* ; Plant Diseases/microbiology* ; Metal Nanoparticles/chemistry* ; Antifungal Agents/pharmacology*

Objective:To evaluate the efficacy of early bronchoalveolar lavage using electronic bronchoscopy in pediatric drowning cases.Methods:A retrospective analysis of clinical data from 81 pediatric drowning cases treated in the intensive care unit of Hunan Children's Hospital from January 2017 to September 2023 was conducted.Among these,43 cases underwent bronchoalveolar lavage with electronic bronchoscopy within 24 hours of drowning,constituting the treatment group,while 38 cases either did not receive treatment within 24 hours or underwent the procedure after 24 hours,forming the control group.We compared the two groups regarding pre-admission observations,admission observations,and disease progression or prognosis indicators to assess the clinical efficacy of early bronchoalveolar lavage with electronic bronchoscopy in pediatric drowning cases.Results:Compared to the control group,children in the treatment group exhibited a significant reduction in invasive ventilation time [(73.33±13.33) h vs.(94.82±15.77) h] and a significant decrease in pediatric intensive care unit stay [105.00 (94.00,121.00) h vs.123.5 (109.75,149.00) h],with both differences being statistically significant( P<0.05).No significant differences in white blood cell count and neutrophil percentage were observed between the treatment group and control group at admission and on the first day( P>0.05).However,by the third day,there was a significant improvement in white blood cell count in both groups,with statistical significance( P<0.05).There was a significant decrease in C-reactive protein and procalcitonin levels between the treatment group and control group on the 1st and 3rd days,with the differences being significant( P<0.05).Six hours after electronic bronchoalveolar lavage,the P/F ratio in the treatment group was lower than that in the control group (177.09±41.27 vs. 233.50±48.23),but it increased more significantly at 24 hours (286.00±34.32 vs.256.34±44.22),with a significant difference between two groups.The positive rate of lavage fluid culture in the treatment group was significantly higher than that in the control group,and the difference was statistically significant( P<0.05).There was no significant difference in the number of organ function damage between two groups( P>0.05).However,regarding prognosis,the treatment group showed significantly better outcomes than the control group( P<0.05). Conclusion:For pediatric patients with wilderness drowning,early electronic bronchoscopy with alveolar lavage may shorten the duration of invasive mechanical ventilation and pediatric intensive care unit stay,improving prognosis,and is worth promoting.

AIM:To evaluate corrective effect and stability of corneal morphology in patients with moderate to high myopia after 2a treatment of femtosecond laser assisted laser in situ keratomileusis(FS-LASIK)Xtra.METHODS:Retrospective case-control study. A total of 30 cases(58 eyes)Patients with moderate to high myopia combined with astigmatism who planned to undergo refractive surgery in our hospital from August 2019 to August 2020 were included, and different types of surgery were performed respectively based on the relevant index of keratoconus screening in the preoperative corneal topography. They were divided into FS-LASIK group and Xtra group, with 15 cases(29 eyes)in each group. Uncorrected visual acuity(UCVA), best corrected visual acuity(BCVA), spherical equivalent(SE)and the corneal curvature of the anterior and posterior surfaces of different diameters(3, 5 and 7 mm)measured by Sirius three-dimensional corneal topography were observed preoperatively and 3 mo, 1 and 2 a postoperatively.RESULTS: The UCVA of the two groups of patients at different time points after surgery was significantly increased compared with preoperatively(both P<0.01), and there was no difference in UCVA and SE between the two groups(P>0.05). After 2 a postoperatively, residual astigmatism was -0.25-0 D in 25 eyes(86%)of the FS-LASIK Xtra group and 24 eyes(83%)of the FS-LASIK group. The actual corrected SE and expected corrected SE of both groups were positively correlated(both P<0.05). There were differences in corneal curvature on the surface of different diameter areas(3, 5, and 7 mm)between the two groups at 3 mo, 1, and 2 a postoperatively compared with preoperatively. After 1 and 2 a postoperatively, the corneal posterior surface curvature of the FS-LASIK Xtra group with corneal diameter of 3 and 5 mm was higher than that of the FS-LASIK group(P<0.05).CONCLUSIONS:FS-LASIK Xtra has good safety, efficacy and predictability in correcting patients with moderate to high myopia.