BACKGROUND:Promoting skin wound healing is a huge challenge facing global public health.To promote faster and higher-quality wound healing,it is necessary to explore more advantageous dressings to address this problem.OBJECTIVE:To investigate the hemostatic properties of acellular dermal matrix hydrogel and its effect on skin wound healing.METHODS:(1)Acellular dermal matrix hydrogel was prepared,and the differences in microscopic morphology and main components between it and acellular dermal matrix were analyzed.(2)Acellular dermal matrix hydrogel and chitosan hydrogel were used to cover the femoral artery puncture site of rats,and the bleeding quality and coagulation time were recorded.Acellular dermal matrix hydrogel and chitosan hydrogel were mixed with rat anticoagulated blood,and the coagulation index within 30 minutes was detected.(3)A full-thickness skin defect model with a diameter of 12 mm was made on the back of 18 SD rats,and they were randomly divided into 3 groups,with 6 rats in each group:the model group used PBS to clean the wound,and the control group and the experimental group used chitosan hydrogel and acellular dermal matrix hydrogel to cover the wound,respectively.The hydrogel dressing was changed every day,and the treatment was continued for 14 days,and the wound healing was observed.On day 3 after modeling,immunofluorescence staining of inducible nitric oxide synthase(M1 macrophages)and CD206(M2 macrophages)was performed on the wound surface.On day 14 after modeling,hematoxylin-eosin staining,Masson staining,and CD31 immunohistochemical staining were performed on the wound surface.RESULTS AND CONCLUSION:(1)Scanning electron microscopy revealed that the acellular dermal matrix hydrogel had a porous structure,and the Fourier transform infrared spectrum showed that it had the same main components as the acellular dermal matrix.(2)Both acellular dermal matrix hydrogel and chitosan hydrogel had obvious hemostatic ability in vivo.In the in vitro coagulation experiments,the coagulation index of acellular dermal matrix hydrogel was significantly higher than that of chitosan hydrogel.(3)In the rat skin full-thickness defect model,both acellular dermal matrix hydrogel and chitosan hydrogel could improve the wound healing rate.Hematoxylin-eosin and Masson staining results showed that acellular dermal matrix hydrogel could reduce the infiltration of inflammatory cells in the center of the wound.Both acellular dermal matrix hydrogel and chitosan hydrogel could decrease scar width and increase collagen deposition rate.CD31 immunohistochemical staining results showed that both hydrogels could promote angiogenesis in the wound site.Immunofluorescence staining results showed that both hydrogels could reduce the proportion of M1 macrophages and increase the proportion of M2 macrophages,and the effect of acellular dermal matrix hydrogel was stronger than that of chitosan hydrogel.(4)The results show that the acellular dermal matrix hydrogel has good hemostatic properties and the ability to promote wound healing.

BACKGROUND:Promoting skin wound healing is a huge challenge facing global public health.To promote faster and higher-quality wound healing,it is necessary to explore more advantageous dressings to address this problem.OBJECTIVE:To investigate the hemostatic properties of acellular dermal matrix hydrogel and its effect on skin wound healing.METHODS:(1)Acellular dermal matrix hydrogel was prepared,and the differences in microscopic morphology and main components between it and acellular dermal matrix were analyzed.(2)Acellular dermal matrix hydrogel and chitosan hydrogel were used to cover the femoral artery puncture site of rats,and the bleeding quality and coagulation time were recorded.Acellular dermal matrix hydrogel and chitosan hydrogel were mixed with rat anticoagulated blood,and the coagulation index within 30 minutes was detected.(3)A full-thickness skin defect model with a diameter of 12 mm was made on the back of 18 SD rats,and they were randomly divided into 3 groups,with 6 rats in each group:the model group used PBS to clean the wound,and the control group and the experimental group used chitosan hydrogel and acellular dermal matrix hydrogel to cover the wound,respectively.The hydrogel dressing was changed every day,and the treatment was continued for 14 days,and the wound healing was observed.On day 3 after modeling,immunofluorescence staining of inducible nitric oxide synthase(M1 macrophages)and CD206(M2 macrophages)was performed on the wound surface.On day 14 after modeling,hematoxylin-eosin staining,Masson staining,and CD31 immunohistochemical staining were performed on the wound surface.RESULTS AND CONCLUSION:(1)Scanning electron microscopy revealed that the acellular dermal matrix hydrogel had a porous structure,and the Fourier transform infrared spectrum showed that it had the same main components as the acellular dermal matrix.(2)Both acellular dermal matrix hydrogel and chitosan hydrogel had obvious hemostatic ability in vivo.In the in vitro coagulation experiments,the coagulation index of acellular dermal matrix hydrogel was significantly higher than that of chitosan hydrogel.(3)In the rat skin full-thickness defect model,both acellular dermal matrix hydrogel and chitosan hydrogel could improve the wound healing rate.Hematoxylin-eosin and Masson staining results showed that acellular dermal matrix hydrogel could reduce the infiltration of inflammatory cells in the center of the wound.Both acellular dermal matrix hydrogel and chitosan hydrogel could decrease scar width and increase collagen deposition rate.CD31 immunohistochemical staining results showed that both hydrogels could promote angiogenesis in the wound site.Immunofluorescence staining results showed that both hydrogels could reduce the proportion of M1 macrophages and increase the proportion of M2 macrophages,and the effect of acellular dermal matrix hydrogel was stronger than that of chitosan hydrogel.(4)The results show that the acellular dermal matrix hydrogel has good hemostatic properties and the ability to promote wound healing.

Objective: To identify the latent profile characteristics and associated factors of family intergenerational transmission of proactive health behaviors in overweight and obesity junior high school students, so as to provide a reference for promoting active health in adolescents. Methods: From October to December 2024, a stratified cluster random sampling method was employed to select 4 932 junior high school students with overweight and obesity from 18 junior high schools of three cities representing the eastern (Yantai), central (Zibo), and western (Zaozhuang) regions of Shandong Province. Latent profile analysis was used to explore the heterogeneity of family intergenerational transmission among those students. Univariate analysis and multiple Logistic regression analysis were conducted to identify factors associated with different profiles and to examine the influence of profile membership on junior high school students proactive health levels. Results: The intergenerational transmission of health behaviors in junior high school students could be classified into 3 latent profiles:the moderate modeling dysfunctional group (5.88%, n =290), the low modeling advantage deficient group (41.79%, n =2 061), and the high modeling functional harmonious group ( 52.33 % n =2 581). Univariate analysis showed that gender, urban/rural area, region location, paternal/maternal education level, family economic status, and only child status were significantly associated with the classification of latent profiles of intergenerational transmission in families of overweight and obesity junior high school students ( χ 2=7.63-165.22, all P <0.05). Multiple Logistic regression analysis revealed that, using the moderate modeling dysfunctional group as the reference, male students ( OR =0.71) and those residing in coastal cities ( OR =0.74) were less likely to belong to the low modeling advantage deficient group (both P <0.05); students with moderate family economic status were more likely to belong to the low modeling advantage deficient group ( OR =1.72， P <0.05). Conversely, students living in urban areas ( OR =1.43), those with fathers ( OR =2.53) or mothers ( OR =2.48) having a college degree or above, and those with moderate ( OR =3.89) or good ( OR =2.42) family economic status were more likely to be classified into the high modeling functional harmonious group (all P < 0.05 ). Using the low modeling advantage deficient group as the reference, residing in coastal cities ( OR =1.26), living in urban residence ( OR =1.14), having parents (father or mother) with a college education or above ( OR =1.91, 2.33), moderate or good family economic status ( OR = 2.27 , 3.17), and being an only child ( OR =1.19) were associated with a higher probability of belonging to the high modeling functional harmonious group (all P < 0.05 ). There was a statistically significant difference in active health behaviors among students across different latent profiles of family intergenerational transmission ( F =494.79, P <0.01). Conclusions The heterogeneity of family intergenerational transmission is associated the level of proactive health behaviors among junior high school students. Therefore, precision interventions should be implemented based on different categories of family intergenerational transmission, so as to strengthen the efficacy of intergenerational transmission of health behaviors and promote proactive health among junior high school students.

Objective: To establish a database of CD36 antigen-negative donors through large-scale screening of apheresis platelet donors in Shenzhen for CD36 deficiency subtypes and blood group distribution, and to assess clinical demand and blood supply capacity through a retrospective analysis of the apheresis platelet donation volumes from 2019 to 2023. Methods: Flow cytometry with fluorescent CD36 monoclonal antibodies was employed to screen platelet/monocyte CD36 deficiency (Type I and Ⅱ), and statistical analyses were conducted using SPSS software (version 27.0). Results: Among 11 603 apheresis platelet donors, 248 (2.14%) exhibited CD36 deficiency, comprising 51 type Ⅰ (0.43%, 51/11, 603) and 197 type Ⅱ (1.70%, 197/11, 603) cases, with significant difference (P<0.001). CD36 deficient platelets were mainly distributed in blood group B (2.28%, 902.3/39 602.1) and AB (2.14, 269/12 544.5), significantly exceeding those in blood group A (1.43%, 667/46 508.4) and O (1.64%, 1 000/60 965.6) (P<0.001). The proportion of donors with 10-100 U from CD36 deficient donors was the highest (51%, 1 446.4/2 838.3). Conclusion: Sustained screening for CD36-deficient donors is recommended to meet the clinical transfusion needs for immunized patients and those requiring antigen-negative products. Regional resource-sharing mechanisms should be optimized to maximize utilization of CD36-deficient platelet inventories.

Objective To analyze the epidemiological characteristics of norovirus outbreaks in Haidian District, Beijing, and to provide a reference for epidemic prevention and control. Methods Descriptive epidemiological methods were used to organize and statistically analyze the norovirus outbreak data reported from 2016 to 2022. Results A total of 26 outbreaks of norovirus were reported in Haidian District, with a total of 1595 cases and an attack rate M (Q_R) of 8.23 (16.33)%. There were 24 cases of norovirus type GII (92.31%), 1 case of type GI (3.85%), and 1 case of mixed infection of virus type GI/GII (3.85%). The highest number of reported outbreaks occurred in March and April, with 17 cases, accounting for 65.38%. The highest number of reported cases was in November and December, with 785 cases, accounting for 44.92%. The case age M (Q_R) was 18 (14) years old. The detection rate of positive samples in different age groups had statistical significance（χ²=12.021, P=0.007). The 26 outbreaks were mainly distributed in collective units such as schools, preschool institutions, and enterprises and institutions. There were a total of 11 outbreaks related to foodborne transmission, with 923 cases, accounting for 57.87%. Diarrhea was positively correlated with the age of the cases (r_s=0.572, P<0.001), while vomiting was negatively correlated with the age of the cases (r_s=-0187, P<0.001). The time interval between the onset of acute gastroenteritis symptoms in the first case and the reporting of the epidemic was positively correlated with the duration of the epidemic (r_s=0.586, P=0.002). Conclusion It is necessary to strengthen the prevention and control of norovirus in schools (primary and secondary schools and colleges), strictly implement health monitoring and regular screening for kitchen workers, carry out publicity and education, detect cases as early as possible, report the epidemic in a timely manner, and effectively reduce the scale of the epidemic and prevent its spread.

Congenital fibrosis of extraocular muscles (CFEOM) syndrome is a genetically determined congenital disorder characterized by non-progressive ophthalmoplegia, restrictive ocular fixation, and ptosis. Its estimated incidence is approximately 1 in 230 000 to 250 000. This paper reports a family with type 3 CFEOM diagnosed at the Second Xiangya Hospital of Central South University. The proband was a 10-year-old female who presented with right esotropia and right upper eyelid ptosis. Whole-exome sequencing revealed a heterozygous c.904G>A mutation in the TUBB3 gene. Genetic testing of family members identified that the proband's mother carried the same mutation and exhibited left eyelid ptosis. The child underwent strabismus correction followed by ptosis repair, both of which led to marked postoperative improvement. For children presenting with congenital extraocular movement restriction and ptosis, genetic testing plays a crucial role in confirming the diagnosis and guiding family analysis. Additionally, individualized surgical intervention can significantly improve both ocular function and cosmetic appearance.
Humans ; Female ; Child ; Ophthalmoplegia/congenital* ; Fibrosis/congenital* ; Blepharoptosis/surgery* ; Mutation ; Tubulin/genetics* ; Pedigree ; Male ; Esotropia/genetics* ; Congenital Cranial Dysinnervation Disorders

Objective To explore the protective effect of miR-374c-5p on hydrogen peroxide(H2O2)-induced apoptosis of human umbilical vein endothelial cells(HUVECs).Methods HUVECs were cultured in vitro and the harvested cells were divided into four groups:control group,H2O2 group,H2O2+miR-374c-5p mimics trans-fection group,and H2O2+miR-374c-5p inhibitor transfection group.Cell activity was assessed by CCK-8 prolifer-ation rate assay,apoptosis was detected by TUNEL staining microscopy.Expression of miR-374c-5p and Fas mRNA by RT-qPCR,and Fas protein in HUVECs by was detected by Western blot.Results Proliferation of HUVECs was significantly inhibited(P＜0.001);H2O2 was significantly increased as compared with the H2O2 in-tervention group(P＜0.001);Proliferation in H2O2+miR-374c-5p inhibitor transfection group was significantly increased as compared to H2O2 intervention group(P＜0.001).Conclusions miR-374c-5p protectes the HUVECs against apoptosis induced by H2O2.

Objective To analyze the epidemiology and trends of measles,tuberculosis,pertussis,scarlet fever,influenza,mumps and rubella in Beijing between 2014 and 2023 in order to provide data for prevention and control of related diseases.Methods Data on the incidences of seven respiratory infectious diseases in Beijing between 2014 and 2023 was collected.Descriptive epidemiological methods were employed to analyze their demographic,temporal and spatial distribution.Joinpoint regression analysis was used to assess temporal trends in incidence.Results A total of 1 406 777 cases of seven respiratory infectious diseases were reported in Beijing between 2014 and 2023,which corresponded to an average crude rate of 649.76/100 000 reported annually.The crude rate of incidencewas higher among females than among males,with the most vulnerable age groups being 0-4 years and 5-19 years,and was higher in the six districts than on the outskirts.Most of the respiratory infectious diseases peaked in winter and spring.The annual increase in the incidence of respiratory infectious diseases in Beijing in this period averaged 27.27％,with no statistically significant differences in trends.The incidence rates of measles,tuberculosis,scarlet fever,mumps and rubella decreased significantly while those of pertussis and influenza increased,but with no statistically significant difference.Conclusion The overall incidence of major respiratory infectious diseases in Beijing is increasing.It is recommended that more people get vaccinated,surveillance of such diseases as pertussis and influenza be enhanced,and regional health resources be allocated more effectively,all of which will be critical to subsequent prevention and control of respiratory infectious diseases in Beijing.

Objective:To summarize the clinical characteristics of elderly patients with stage Ⅰ diffuse large B-cell lymphoma (DLBCL) and analyze the factors associated with prognosis.Methods:A case series study was conducted by retrospectively collecting clinical data from patients aged over 60 years with newly diagnosed stage Ⅰ DLBCL across 20 medical centers in Jiangsu Province, China, between June 2010 and April 2023. The involved site, classification and treatment plan were summarized. The primary endpoints were progression-free survival (PFS) and overall survival (OS). Statistical analyses were performed using the Kaplan-Meier method, and Cox regression model.Results:The study included 255 patients with a median age of 69 years, of whom 130 (51.0%) were male, 66 (25.9%) were aged ≥75 years and 26 (10.1%) had a high Charlson Comorbidity Index (CCI) score of ≥2. Extranodal involvement was observed in 163 (63.9%) patients, with the stomach (37.4%, 61/163), intestine (19.0%, 31/163), testes (11.0%, 18/163), and breast (7.4%, 12/163) being the most frequently affected sites. The non-germinal center B-cell (non-GCB) subtype was prevalent in 63.7% of patients (142/223), with no significant difference between the nodal and extranodal groups ( P=0.681). Furthermore, 73.9% (184/249) and 11.7% (29/249) of patients received the R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, prednisone) and R-miniCHOP regimen, respectively. The overall 3-year PFS rate was 81.5%, and the 3-year OS rate was 85.6%. Patients aged ≥75 years ( HR=2.910, 95% CI 1.565-5.408, P=0.001) and/or with a CCI score ≥2 ( HR=2.324, 95% CI 1.141-4.732, P=0.020) had a significantly poorer PFS. Incorporating age ≥75 years and CCI score ≥2 into the stage-modified international prognostic index (sm-IPI) can better stratify the prognosis of elderly patients with stage Ⅰ DLBCL. The 3-year PFS rate was 48.7% in the high-risk group versus 85.7% in the low-risk group ( P<0.001). Conclusions:Our findings show that the elderly patients with stage Ⅰ DLBCL were predominantly characterized by extranodal involvement (particularly in the stomach and intestinal tract) and non-GCB subtype. Age ≥75 years and CCI ≥2 were identified as independent prognostic factors. The newly established sm-IPI-75-CCI incorporating these factors demonstrated superior prognostic discrimination compared to conventional risk assessment systems.

AIM:To investigate the effects of the Qingfei-Jiedu-Huatan formula(QJHF)on damage to the lung vascular endothelial barrier induced by Klebsiella pneumoniae in mice with severe pneumonia,as well as to elucidate its underlying mechanisms.METHODS:Fifty-one C57BL/6J mice were randomly divided into control group(n=6),model group(n=15),QJHF group(n=15),and ceftriaxone sodium(CRO)group(n=15).Severe pneumonia was in-duced in the mice by a single tracheal intubation with 50 μL of 1×1011 CFU/mL Klebsiella pneumoniae on day 0.Six hours after modeling,the mice in QJHF and CRO groups received their respective treatments,while those in control and model groups were administered an equal volume of saline.All mice were sacrificed on day 3 after the end of gavage.Lung histo-pathological changes were assessed using hematoxylin-eosin(HE)staining.Levels of tumor necrosis factor-α(TNF-α),interleukin-1β(IL-1β),and IL-6 in lung tissues were measured by enzyme-linked immunosorbent assay(ELISA).Flow cytometry was used to detect CD11b+Ly6g+cells in bronchoalveolar lavage fluid(BALF).Proteomics and network pharma-cology analyses were conducted to elucidate the mechanisms of drug action.Western blot was conducted to assess the ex-pression levels of vascular endothelial cadherin(VE-cadherin),zonula occludens-1(ZO-1),occludin,vascular endothe-lial growth factor(VEGF),P38 mitogen-activated protein kinase(P38),and phosphorylated P38(p-P38)in lung tis-sues.RESULTS:Treatment with QJHF significantly attenuated the symptoms such as mental status and respiratory dis-tress,reduced mortality,mitigated lung tissue lesions,and decreased levels of IL-6,TNF-α,IL-1β,as well as BALF to-tal protein concentration,total cell count and neutrophil content in a mouse model of severe pneumonia(P＜0.05 or P＜0.01).Additionally,QJHF increased the expression of VE-cadherin,ZO-1 and occludin proteins in lung tissues.Pro-teomic analysis demonstrated that QJHF modulated the expression of 129 proteins in the lung tissues of mice suffering from severe pneumonia.Network pharmacology identified 328 potential targets associated with 14 major bioactive components of QJHF and 1 665 genes related to severe pneumonia,with 125 overlapping genes between the two datasets.The construc-tion of a protein-protein interaction(PPI)network,along with Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analyses of the regulated proteins and overlapping genes,indicated that QJHF primarily in-fluenced the PI3K-Akt,MAPK and Rap1 signaling pathways,as well as VEGFR.Western blot analysis showed that QJHF significantly inhibited the expression of VEGF and P38 in lung tissues(P＜0.05 or P＜0.01).CONCLUSION:Treatment with QJHF attenuates severe pneumonia in mice,potentially by inhibiting VEGF/P38 signaling to protect the vascular endothelial barrier.