Cats, owing to their physiological and immunological similarities with humans, have become increasingly valuable as model animals in virology research, drug development, and vaccine evaluation. They are irreplaceable in studies of feline immunodeficiency virus, feline coronavirus, and other related pathogens. However, cats are temperamentally sensitive, exhibit strong stress responses, and possess well-developed nervous systems as well as sharp claws and teeth. Consequently, the biosafety risks associated with infectious experiments using cats in animal biosafety level 2 laboratory (ABSL-2) are significantly higher than those encountered with conventional rodents. Drawing on long-term ABSL-2 operational experience, this article systematically reviews the entire workflow of infectious experiments in laboratory cats — from animal selection, pre-entry preparation, reception and quarantine, housing management, to infectious experimental procedures and incident response — identifying and addressing critical risk points at each stage. For strain selection, SPF-grade shorthair cats with defined genetic backgrounds and docile temperaments are recommended; sex and age should be scientifically matched to experimental objectives. During pre-entry preparation, emphasis is placed on dual-credential personnel management, health surveillance, standardized disinfection of environments and cages, feed and water standards, and robust record-keeping. During reception and quarantine, standardized protocols are established for transport control, appearance inspection, isolation quarantine, pathogen exclusion, and positive-reinforcement training. During infectious experimentation, a "three-fixed" husbandry principle is clearly implemented: dedicated caretakers, fixed feeding/cleaning times, and fixed cage positions. Disinfectant selection, autoclaving of waste, and daily veterinary rounds are rigorously enforced. Operational risk control includes detailed measures for graded personal protection, animal anesthesia and restraint, zoned operation within biosafety cabinets, and disposal of experimental waste. Contingency plans are formulated to address animal death, escape, personnel exposure, and spills of infectious materials. This study provides a reproducible and scalable technical pathway and operational standard for conducting infectious experiments in laboratory cats in ABSL-2 laboratories, offering a reference for other facilities undertaking similar work.

ObjectiveTo prepare rabbit anti-porcine inhibin polypeptide-keyhole limpet hemocyanin(KLH) conjugated polyclonal antibody and evaluate its effect on superovulation in C57BL/6J mice. MethodsNew Zealand white rabbits were immunized with a synthesized porcine inhibin polypeptide conjugated with KLH to produce anti-inhibin serum (AIS, i.e., inhibin polyclonal antibody). Female C57BL/6J mice received intraperitoneal injections of purified AIS in combination with pregnant mare serum gonadotropin (PMSG), followed by human chorionic gonadotropin (hCG) after 48 hours to induce superovulation. Oocytes obtained from superovulation were collected and counted 15 hours post-hCG administration, and the number of 2-cell embryos was assessed 24 hours after in vitro fertilization. ResultsAIS prepared by immunizing New Zealand White rabbits with KLH-conjugated porcine inhibin polypeptide was subjected to titer determination by indirect ELISA, showing titers reaching 1∶ 512 000. SDS-polyacrylamide gel electrophoresis analysis of ammonium sulfate-purified AIS revealed distinct 50 kDa and 25 kDa bands corresponding to the theoretical molecular weights of IgG antibody heavy and light chains, confirming successful production of porcine inhibin polyclonal antibody. Compared with conventional superovulation methods, AIS diluted 10-fold combined with PMSG significantly increased the number of oocytes obtained from superovulation in mice (P<0.05) by approximately 1.5-fold. ConclusionPorcine inhibin polyclonal antibody, as an improved superovulation reagent, can improve superovulation efficiency in C57BL/6J mice, and shows promising prospects for future applications.

Objective To explore the feasibility and reference value of allogeneic lung transplantation and postoperative monitoring in miniature pigs for lung transplantation research. Methods Two miniature pigs (R1 and R2) underwent left lung allogeneic transplantation. Complement-dependent cytotoxicity tests and blood cross-matching were performed before surgery. The main operative times and partial pressure of arterial oxygen (PaO₂) after opening the pulmonary artery were recorded during surgery. Postoperatively, routine blood tests, biochemical blood indicators and inflammatory factors were detected, and pathological examinations of multiple organs were conducted. Results The complement-dependent cytotoxicity test showed that the survival rate of lymphocytes between donors and recipients was 42.5%-47.3%, and no agglutination reaction occurred in the cross-matching. The first warm ischemia times of D1 and D2 were 17 min and 10 min, respectively, and the cold ischemia times were 246 min and 216 min, respectively. Ultimately, R1 and R2 survived for 1.5 h and 104 h, respectively. Postoperatively, in R1, albumin (ALB) and globulin (GLB) decreased, and alanine aminotransferase increased; in R2, ALB, GLB and aspartate aminotransferase all increased. Urea nitrogen and serum creatinine increased in both recipients. Pathological results showed that in R1, the transplanted lung had partial consolidation with inflammatory cell infiltration, and multiple organs were congested and damaged. In R2, the transplanted lung had severe necrosis with fibrosis, and multiple organs had mild to moderate damage. The expression levels of interleukin-1β and interleukin-6 increased in the transplanted lungs. Conclusions The allogeneic lung transplantation model in miniature pigs may systematically evaluate immunological compatibility, intraoperative function and postoperative organ damage. The data obtained may provide technical references for subsequent lung transplantation research.

Objective We aimed to evaluate the efficacy and safety of Shengxuebao Mixture in the treatment of cancer-related anemia(CRA)presenting with syndrome of deficiency of liver and kidney combined with syndrome of deficiency of both qi and blood.Methods A randomized,double-blind,placebo-controlled,multicenter clinical trial was conducted.Eligible patients with malignant tumors meeting the inclusion and exclusion criteria were enrolled from 26 hospitals,including Dongzhimen Hospital,Beijing University of Chinese Medicine,Xiaogan Central Hospital,and Yangzhou Hospital of Traditional Chinese Medicine,from June 1,2022,to September 30,2024.Patients were allocated 1:1 to either the experimental group receiving Shengxuebao Mixture or the control group receiving its simulator(placebo)using a block randomization method under double-blind conditions.Both groups received 15 mL orally three times daily for 28 consecutive days.The primary efficacy indicators included the hemoglobin(Hb)improvement rate(RHb)and the traditional Chinese medicine(TCM)syndrome improvement rate(RTCM)at week 4 of treatment.The secondary efficacy indicators encompassed Hb and red blood cell(RBC)count,Karnofsky Performance Status(KPS)score,TCM syndrome score,individual TCM symptom scores,and changes in each of these indicators compared to the baseline period at weeks 2,4,and 6 of treatment.Safety evaluations were conducted at week 4 of treatment.Results A total of 239 patients were enrolled,with 225 cases included in the Full Analysis Set(FAS)(109 in the experimental group vs.116 control group),163 in the Per Protocol Set(PPS)(77 vs.86),and 225 in the Safety Set(SS)(109 vs.116).Baseline characteristics between groups showed no significant differences.Significant differences were observed between the experimental and control groups in RHb at week 4(FAS:49.51%vs.35.24%,P<0.05;PPS:53.25%vs.36.05%,P<0.05)and RTCM at week 4(FAS:61.54%vs.39.62%,P<0.01;PPS:64.94%vs.40.70%,P<0.01).At weeks 2,4,and 6,the experimental group showed greater improvements in Hb and RBC counts than the control group.Additionally,the TCM syndrome scores were lower in the experimental group than in the control group at these time points.Except for week 2 in PPS,the KPS improvement was better in the experimental group than in the control group(P<0.05).The experimental group also demonstrated a greater reduction in scores for individual TCM symptoms such as spiritlessness and weakness,poor appetite and reduced food intake at weeks 4 and 6 compared to the control group(P<0.05,P<0.01).Furthermore,the reduction in vertigo score was more pronounced in the experimental group at week 6(P<0.01).For the score of pale and lusterless complexion,only in the PPS was the reduction from baseline more significant in the experimental group than in the control group at weeks 4 and 6(P<0.05).No significant differences were observed between the experimental and control groups in the incidence of all adverse events or drug-related adverse reactions.Conclusion Shengxuebao Mixture demonstrates significant efficacy in patients with CRA presenting syndrome of deficiency of liver and kidney combined with syndrome of deficiency of both qi and blood,effectively increasing Hb levels,ameliorating TCM syndromes,alleviating clinical symptoms,and enhancing functional status,with no significant difference in adverse drug reactions compared to the placebo.

Body weight abnormalities, including overweight, obesity, and underweight, have become a dual public health challenge in Chinese adults: overweight and obesity lead to a variety of chronic complications, while underweight increases the risks of malnutrition, sarcopenia, and organ dysfunction. To systematically address these issues, multidisciplinary experts in endocrinology, sports science, nutrition, and psychiatry from various regions have held multiple weight management seminars. Based on the latest epidemiological data and clinical evidence, they expanded the guideline to include assessment and intervention strategies for underweight, in addition to the core content of obesity management. This guideline outlines the etiological mechanisms, evaluation methods, and multidimensional management strategies for overweight and obesity, covering key areas such as diagnosis and assessment, medical nutrition therapy, exercise prescription, pharmacological intervention, and psychological support. It is intended to provide a scientific and standardized approach to weight management across the adult population, aiming to curb the rising prevalence of obesity, mitigate complications associated with abnormal body weight, and improve nutritional status and overall quality of life.

Neurotropic viruses are a group of viruses that highly sensitive to central nervous system.As the first line of defense against pathogen invasion,the activation of pathogen recognition receptor signaling network in innate immune system plays a"double-edged"role in the process of neurotropic virus infection,which has both antiviral effect and may aggravate virus infection under certain circumstances.This article reviews the research progress on dual roles of pathogen recognition receptors in neurotropic virus infection.

Objective:To explore the relationship between international collaboration papers and academic impact in global health,using the member universities of the Chinese Consortium of Universities for Global Health(CCUGH)as a case study.Methods:The study focuses on journal articles in global health field published by 31 CCUGH member universities between 2014 and 2024.Descriptive statistical analysis of international and non-international collaboration publication volumes was conducted using Excel.Regression analysis and chi-square tests were performed using R to examine the relationship between international collaboration papers and academic impact,and the correlation between the breadth of collaboration and the academic impact of the papers.Results:From 2014 to 2023,the total number of publications,the number of non-international collaborationpublications,and the number of internationally collaborated publications all showed a consistent annual increase,with average annual growth rates of 56.7%,68.3%,and 41.4%,respectively.By the first half of 2024,the total number of publications had increased to 1.5 times that of the corresponding period in 2023.International collaboration positively influenced academic impact,with broader collaborative networks correlating with higher academic influence.Conclusion:The global health publication output of CCUGH member universities has steadily increased,but the volume of international collaboration papers and their proportion remain relatively low.Therefore,it is necessary for CCUGH member universities to strengthen international collaboration papers in global health.

Aim To explore the protective effects and underlying molecular mechanisms of periplogenin(Ppg)in preventing acetaminophen(APAP)-induced drug-induced liver injury(DILI).Methods An APAP-induced liver injury model was established in vi-vo and in vitro.Liver/spleen indices were recorded,and serum aspartate aminotransferase(AST)and ala-nine aminotransferase(ALT)levels were measured.The pathological changes in liver tissue were observed using hematoxylin-eosin(HE)staining.The influence of Ppg on inflammatory cytokines(IL-6,TNF-α,IL-1 β)and key proteins within the associated signaling pathways was examined using enzyme-linked immu-nosorbent assay(ELISA),quantitative polymerase chain reaction(qPCR),and Western blot.Additional-ly,glutathione(GSH),malondialdehyde(MDA),and superoxide dismutase(SOD)activity levels were meas-ured.The expression of markers related to the NF-κB signaling pathway was assessed using qPCR,Western blot,and immunofluorescence.Results In vivo exper-iments showed that Ppg improved the liver and spleen index of mice with drug-induced liver injury,and the levels of AST and ALT in the serum decreased signifi-cantly,reducing the pathological damage of liver tis-sue.In vitro experiments showed that Ppg significantly inhibited the expression of IL-6,TNF-α and IL-1 β,and decreased the levels of GSH and MDA and in-creased SOD activity in AML-12 cells.Additionally,the inhibition of the NF-κB signaling pathway using pyrrolidinedithiocarbamate ammonium(PDTC),an NF-κB signaling pathway inhibitor reduced inflammato-ry cytokine expression and significantly decreased p65 nuclear translocation,showing results comparable to those observed in the high-dose Ppg group.Conclu-sions Ppg alleviates APAP-induced liver injury,po-tentially by inhibiting the NF-κB signaling pathway in hepatocytes,thereby reducing the inflammatory re-sponse and protecting liver from APAP-induced dam-age.

Neurotropic viruses are a group of viruses that highly sensitive to central nervous system.As the first line of defense against pathogen invasion,the activation of pathogen recognition receptor signaling network in innate immune system plays a"double-edged"role in the process of neurotropic virus infection,which has both antiviral effect and may aggravate virus infection under certain circumstances.This article reviews the research progress on dual roles of pathogen recognition receptors in neurotropic virus infection.

Aim To explore the protective effects and underlying molecular mechanisms of periplogenin(Ppg)in preventing acetaminophen(APAP)-induced drug-induced liver injury(DILI).Methods An APAP-induced liver injury model was established in vi-vo and in vitro.Liver/spleen indices were recorded,and serum aspartate aminotransferase(AST)and ala-nine aminotransferase(ALT)levels were measured.The pathological changes in liver tissue were observed using hematoxylin-eosin(HE)staining.The influence of Ppg on inflammatory cytokines(IL-6,TNF-α,IL-1 β)and key proteins within the associated signaling pathways was examined using enzyme-linked immu-nosorbent assay(ELISA),quantitative polymerase chain reaction(qPCR),and Western blot.Additional-ly,glutathione(GSH),malondialdehyde(MDA),and superoxide dismutase(SOD)activity levels were meas-ured.The expression of markers related to the NF-κB signaling pathway was assessed using qPCR,Western blot,and immunofluorescence.Results In vivo exper-iments showed that Ppg improved the liver and spleen index of mice with drug-induced liver injury,and the levels of AST and ALT in the serum decreased signifi-cantly,reducing the pathological damage of liver tis-sue.In vitro experiments showed that Ppg significantly inhibited the expression of IL-6,TNF-α and IL-1 β,and decreased the levels of GSH and MDA and in-creased SOD activity in AML-12 cells.Additionally,the inhibition of the NF-κB signaling pathway using pyrrolidinedithiocarbamate ammonium(PDTC),an NF-κB signaling pathway inhibitor reduced inflammato-ry cytokine expression and significantly decreased p65 nuclear translocation,showing results comparable to those observed in the high-dose Ppg group.Conclu-sions Ppg alleviates APAP-induced liver injury,po-tentially by inhibiting the NF-κB signaling pathway in hepatocytes,thereby reducing the inflammatory re-sponse and protecting liver from APAP-induced dam-age.