The relevant laws and regulations regarding the utilization of the deceased as medical research subjects are not yet fully developed in China nowadays. Taking the deceased as research subjects as a starting point， this paper discussed the definition of the deceased and the scope of their interest protection from multiple perspectives. It posited that the scope of interest protection for the deceased encompassed two components： spiritual personality interests and material personality interests represented by the remains. The spiritual personality interests of the deceased included identification information such as name， portrait， reputation， honor， privacy， and personal information， as well as medical and health information. The personal information of the deceased was not directly affected by the individual’s life and death status and remained relatively independent. In terms of ethical review， the research team approached from two perspectives： the remains and the personal information of the deceased. Based on the standard of whether the research subjects involve a human body， research with the remains of the deceased as the medical research subjects was classified as non-clinical research. According to the standard of whether a human body is clinically operated， research with the personal information of the deceased （including medical and health information） as the medical research subjects was recognized as clinical research without human research operation. This approach provided evidence for the application of existing laws and regulations in ethical review and record management. The ethical review of investigator-initiated clinical research conducted in medical and health institutions， as well as the regulatory conditions for exemption from ethical review， were examined. The forms， content， and acquisition of informed consent were summarized， and the risk-benefit characteristics of the research activity were evaluated， with a view to providing a basis for the smooth and compliant implementation of research activities involving the deceased as medical research subjects.

AIM To study the chemical constituents from the stems and leaves of Dendrobium formosum Roxb.ex Lindl.and their biological activities.METHODS The 95％ethanol extract from the stems and leaves of D.formosum was isolated and purified by silica gel,Sephadex LH-20 and semi-preparative HPLC,then the structures of obtained compounds were identified by physicochemical properties and spectral data.Their inhibitory activities onα-glucosidase were determined by PNPG method,and their in vitro anti-inflammatory activities were evaluated by RAW264.7 model.RESULTS Fifteen compounds were isolated and identified as coniferyl p-coumarate(1),(-)-pinoresinol(2),2,5,7-trihydroxy-4-methoxy-9,10-dihydrophenanthrene(3),naringenin(4),spiropreussomerin A(5),7-hydroxy-14-de-O-methyl-lasiodiplodin(6),(4S,5S,6Z,8E)-5-hydroxydeca-6,8-dien-4-olide(7),(6S,9R)-blumenol C(8),p-hydroxybenzoic acid(9),m-hydroxybenzoic acid(10),p-hydroxy benzenepropanoic acid(11),5,7-dihydroxy-isobenzofuran(12),2-(4-hydroxyphenyl)-ethanol(13),β-sitostenone(14),β-sitosterol(15).The IC50 values of compounds 1 and 4 on α-glucosidase inhibition were(65.60±3.31)and(98.95±2.53)μmol/L,respectively.Compound 3 presented inhibitory activity on NO production in RAW 264.7 cells,with IC50 value of(3.97±0.12)μmol/L.CONCLUSION Compounds 5-6,8 and 12 are isolated from Orchidacae family for the first time,and 2-15 are first isolated from this plant.Compounds 1 and 4 have α-glucosidase inhibitory activities,and 3 has anti-inflammatory activity.

In view of the characteristics of H5N6 subtype avian influenza virus(AIV)that it has both high pathogenicity and the risk of cross-species transmission,posing a serious threat to the poultry farming industry and public health security,in order to effectively prevent and control the spread of H5N6 avian influenza,a rapid,sensitive and specific detection technolo-gy was established in this study.The specific monoclonal antibodies against the neuraminidase N6 protein of avian influenza A virus subtype H5N6 were obtained through hybridoma and monoclonal antibody technology.These antibodies were coupled and labeled with carboxyl-functionalized fluorescent quantum dots,along with previously prepared specific antibodies against the hemagglutinin H5 protein.A rapid fluorescence immunochromatographic detection method for the H5N6 subtype of avian influ-enza virus was established according to the principle of double-antibody sandwich immunochromatography.This method a-chieved a detection sensitivity of 1 ng/mL for recombinant hemagglutinin H5 subtype protein and 0.1 ng/mL for recombinant neuraminidase N6 subtype protein.Moreover,the method exhibited no cross-reactivity with other influenza subtypes or patho-gens,such as Newcastle disease(ND),infectious bronchitis(IB),and infectious laryngotracheitis(ILT),thus demonstrating good specificity.The method effectively identified the highly pathogenic avian influenza virus H5 subtype and directly distin-guished the H5N6 subtype with good accuracy.The fluorescent quantum dot immunochromatographic typing detection method established herein met the sensitivity,specificity,and accuracy requirements for H5N6 subtype detection,and can be further used for rapid detection of the H5 and H5N6 subtypes of avian influenza virus.

Aim To investigate the role of FRMD4A in autophagy of placental trophoblast cells in preeclampsia(PE).Methods The placental tissues and clinical data of normal pregnancy and PE were obtained,and the histopathological changes were observed by HE staining.An in vitro model of hypoxia-induced HTR-8/SVneo trophoblast cells was established.The expres-sions of LC3B Ⅱ/Ⅰ and p62 in placental tissues and hypoxic cell models were analyzed by Western blot.The expression of FRMD4A was detected by qRT-PCR,Western blot and immunofluorescence,and the correlation between the expression level of FRMD4A and the clinical characteristics of the subjects was ana-lyzed by Pearson correlation analysis.Hypoxia induced trophoblast cells were transfected with si-FRMD4A,and the expression of LC3 B Ⅱ/Ⅰ and p62 was analyzed by Western blot.Results Compared with the normal group,the expression of LC3B Ⅱ/Ⅰ in PE placental tissues and hypoxia-induced trophoblast models was significantly upregulated,while the expression of p62 was significantly downregulated.Meanwhile,the ex-pression of FRMD4A increased significantly.Moreo-ver,its expression was positively correlated with the maternal systolic blood pressure,diastolic blood pres-sure,and platelet count,but negatively correlated with the neonatal weight(P＜0.01).In addition,hypoxia-induced trophoblast cells transfected with si-FRMD4A showed a significant decrease in LC3B Ⅱ/Ⅰ and an increase in p62 expression.Conclusions The expres-sion of FRMD4A is upregulated in PE placenta and hy-poxia-induced trophoblast cell model.Interfering with it can significantly hinder the autophagy process of trophoblast cells,suggesting that it may serve as a po-tential molecular target to participate in the pathologi-cal process of PE.

This study reviews recent publications on the biomechanical causes and treatment of flat foot,through searching PubMed,Web of Science,CNKI,Wanfang and other databases.The reasons for the formation of flat foot include congenital factors and acquired factors,while the treatment methods mainly include orthopedic insoles,physical therapy,surgical therapy and exercise therapy.These methods,to a certain extent,can correct foot structural abnormalities,optimize biomechanical properties and improve foot stability and range of motion.For future research,the advanced imaging and simulation technology will be used for accurate assessment,the application of novel materials and non-surgical therapies will relieve long-term symptoms,genetic researches will promote the development of early diagnosis and personalized treatment,and the use of intelligent orthosis will realize real-time monitoring and dynamic adjustment,to provide more and more effective methods and means for the evaluation,intervention and treatment of flat foot.

Objective To investigate the clinical efficacy and aesthetic outcome of liposuction combined with mammary adenectomy through a periareolar small incision in the management of gynecomastia(GYN).Methods From January 2019 to June 2023,18 patients with GYN were admitted.All of them were treated with small incision through the areola combined with liposuction.The postoperative aesthetic effect,occurrence of complications and patient satisfaction of the patients were evaluated.Results All 18 patients in this study were follwed up for a period of 3 to 18 months.No serious complications such as wound infection or necrosis of the nipple-areola occurred.Pathological examinations were consistent with the diagnosis of GYN.Except for one patient,who exhibited slight skin folds in the surgical area at the 12-month follow-up,the other patients all achieved symmetrical and smooth chest contours with noticeable aesthetic improvement,resulting in a 100％patient satisfaction rate.Conclusion The combined approach of liposuction combined with mammary adenectomy through a periareolar small incision for the treatment of GYN is straightforward,minimally invasive,and yields satisfactory therapeutic and aesthetic outcomes.

BACKGROUND:In the process of intervening in the development of osteoarthritis,platelet-rich plasma plays an important role by intervening in autophagy,apoptotic cytokines and signal transduction pathways.OBJECTIVE:To summarize the structure of cytokines and signaling pathways involved in the diagnosis of osteoarthritis by platelet-rich plasma in recent years,as well as its correlation with chondrocyte apoptosis and autophagy,in order to provide effective targets for the future treatment of osteoarthritis.METHODS:Literature search was conducted in CNKI,WanFang Data,VIP,PubMed,Web of Science,and Medline databases using "platelet-rich plasma,chondrocyte,apoptosis,autophagy,osteoarthritis,cytokines,signaling pathway" as Chinese and English search terms.A systematic summary and induction were made for the 66 included articles.RESULTS AND CONCLUSION:Current research has shown that platelet-rich plasma can promote cartilage repair and assist bone tissue healing through various pathways,mainly divided into three aspects:(1) Platelet-rich plasma regulates the extension,closure,and maturation of microautophagosomes,promotes chondrocyte megaautophagy and molecular chaperone-mediated cell autophagy under specific conditions,enhances the expression of autophagy-related factors such as LC3Ⅱ/Ⅰ and Beclin1,inhibits the expression of P62/SQSTM1.Currently,there is no clear research directly exploring the specific effect of platelet-rich plasma on heat shock proteins,and further research is needed in this field in the future.(2) The various growth factors released by platelet-rich plasma inhibit the expression of pro-apoptotic factors Caspase,interleukin-1β,and tumor necrosis factor alpha,promote the expression of anti-apoptotic factor Bcl-2,and prevent chondrocyte apoptosis and degeneration.(3) By activating the PI3K/AKT/mTOR signaling pathway,NF-κB signal transduction pathway,death receptor pathway,mitochondrial stress pathway and other pathways,platelet-rich plasma inhibits the expression of Bax and Caspase,and prevents the release of cytochrome c,thereby inhibiting the death and necrotic apoptosis of chondrocytes.In general,platelet-rich plasma promotes cartilage repair,supports cartilage regeneration,and plays an anti-inflammatory role,and its biological effect in chondrocytes usually depends on the regulation of autophagy and apoptosis-related cytokines and signaling pathways.

Infectious diseases refer to various diseases caused by pathogens invading human body.Lymphocyte activation gene 3(LAG-3)is a negative immune checkpoint molecule similar to CD4.Most studies have found that LAG-3 plays a regulatory role in occurrence and development of infectious diseases(acquired immunodeficiency disease,active pulmonary tuberculosis,chronic hepa-titis B,falciparum malaria)via inhibiting activation and function of CD4+T and CD8+T cells,and can serve as an effective potential immunotherapy target.This article will summarize researches of LAG-3 and its roles in infectious disease.

Objective To propose an image reconstruction method combining convolutinoal auto-encoder(CAE)and U-Net++network to solve the problems of ill-conditioned sensitivity matrix during cerebral blood flow impedance image reconstruction.Methods Firstly,the CAE model was optimized by introducing dense jump connections in the U-Net++network to enhance the perception of weak features in the sensitivity matrix.Secondly,the feature fusion mechanism in U-Net++network was combined to realize multi-scale fusion of the encoder and decoder in the CAE model,which improved the efficiency of feature transfer.Finally,the simulation data was used for pre-training and convolutional neural networks(CNN)was applied to predicting the conductivity,so as to implement high-precision image recontruction.In order to verify the effectiveness of the proposed method,the reconstruction results for five representative regions of blood flow changes were compared with those by the Tikhonov and conjugate gradient(CG)methods.Results When compared with the Tikhonov and CG methods,the proposed method had the average relative error decreased by 56.96%and 53.05%and the correlation coefficient increased by 19.37%and 5.79%for the reconstruction results of the five representative regions,respectively.The mean value of the structural similarity index by the proposed method was higher than 0.757 for the reconstruction results of the five regions,which was significantly higher than those by the other two methods.Conclusion The proposed method accurately reflects the size and location of blood flow changes in the brain region,enhances the precision and quality of image reconstruction and provides an effective solution for accurate reconstruction of cerebral blood flow impedance images.[Chinese Medical Equipment Journal,2025,46(10):1-8]

On the occasion of the 110th Anniversary of the establishment of the Chinese Medical Association, the third conference of the Fourth Editorial Board of Chinese Journal of Digestive Surgery, and the Second Elite Group of Chinese Journal of Digestive Surgery, was successfully held in Kunming on July 4, 2025. This conference systematically summarizes the development experience of the journal over the past 20 years from three aspects: the role of ecological construction of thought in the discipline construction of digestive surgery, the display of the latest academic achievements in the field of digestive surgery, the development difficulties, and breakthrough paths of the discipline, and strategically plans the path of discipline construction in the new era.