Medical artificial intelligence （AI） is a new type of application formed by the combination of machine learning， computer vision， natural language processing， and other technologies with clinical medical treatment. With the continuous iteration and development of relevant technologies， medical AI has shown great potential in improving the efficiency of diagnosis and treatment， and service quality， but it also increases the possibility of triggering ethical issues. Ethical issues resulting from the clinical application of medical AI were analyzed， including the lack of algorithmic interpretability and transparency of medical AI， leading to information asymmetry and cognitive discrepancies； the concerning status of security and privacy protection of medical data； and the complex and unclear division of responsibilities due to the collaborative participation of multiple subjects in the clinical application of medical AI， resulting in increased difficulty in the identification of medical accidents and clarification of responsibilities. The paper proposed the principles of not harming patients’ interests， physician’s subjectivity， fairness and inclusiveness， and rapid response. It also explored the strategies and implementation paths for responding to the ethical issues of medical AI from multiple perspectives， including standardizing the environment and processes， clarifying responsibility attribution， continuously assessing the impact of data protection， guaranteeing data security， ensuring model transparency and interpretability， carrying out multi-subject collaboration， as well as the principles of being driven by ethical values and adhering to the “human health-centeredness.” It aimed to provide guidance for the healthy development of medical AI， ensuring technological progress while effectively managing and mitigating accompanying ethical risks， thereby promoting the benign development of medical AI technology and better serving the healthcare industry and patients.

Early correction of childhood malocclusion is timely managing morphological, structural, and functional abnormalities at different dentomaxillofacial developmental stages. The selection of appropriate imaging examination and comprehensive radiological diagnosis and analysis play an important role in early correction of childhood malocclusion. This expert consensus is a collaborative effort by multidisciplinary experts in dentistry across the nation based on the current clinical evidence, aiming to provide general guidance on appropriate imaging examination selection, comprehensive and accurate imaging assessment for early orthodontic treatment patients.
Humans ; Malocclusion/diagnostic imaging* ; Child ; Consensus

Pyran- and furanocoumarins are key representatives of tetrahydropyrans and tetrahydrofurans, respectively, exhibiting diverse physiological and medical bioactivities. However, the biosynthetic mechanisms for their core structures remain poorly understood. Here we combined multiomics analyses of biosynthetic enzymes in Peucedanum praeruptorum and in vitro functional verification and identified two types of key enzymes critical for pyran and furan ring biosynthesis in plants. These included three distinct P. praeruptorum prenyltransferases (PpPT1-3) responsible for the prenylation of the simple coumarin skeleton 7 into linear or angular precursors, and two novel CYP450 cyclases (PpDC and PpOC) crucial for the cyclization of the linear/angular precursors into either tetrahydropyran or tetrahydrofuran scaffolds. Biochemical analyses of cyclases indicated that acid/base-assisted epoxide ring opening contributed to the enzyme-catalyzed tetrahydropyran and tetrahydrofuran ring refactoring. The possible acid/base-assisted catalytic mechanisms of the identified cyclases were theoretically investigated and assessed using site-specific mutagenesis. We identified two possible acidic amino acids Glu303 in PpDC and Asp301 in PpOC as vital in the catalytic process. This study provides new enzymatic tools in the epoxide formation/epoxide-opening mediated cascade reaction and exemplifies how plants become chemically diverse in terms of enzyme function and catalytic process.

Objective:To investigate the effect of Chinese medicine He's Yangchao recipe on premature ovarian insufficiency(POI)and its relationship with mitochondrial function of ovarian granulose cells in an animal model.Methods:Thirty-six female C57BL/6J mice were randomly divided into blank control group,model group,low-,medium-and high-dose He's Yangchao recipe treatment group and coenzyme Q10(Q10)treatment group(positive control).The POI model was induced by a single intraperitoneal injection of cyclophosphamide(90 mg/kg).The animals were sacrificed after 21 days.Primary granulose cells were obtained from POI mice and treated with He's Yangchao recipe,ERβ inhibitor PHTPP,and He's Yangchao recipe+PHTPP in vitro for 24 h,respectively.Ovarian histopathological changes were observed by hematoxylin-eosin(HE)staining,ATP levels were detected by luciferase assay,mtDNA copy numbers were detected by quantitative reverse transcriptase-polymerase chain reaction(qRT-PCR),mitochondrial structure changes were observed by transmission electron microscopy,protein and mRNA expression levels of estrogen receptor β(ERβ),peroxisome proliferator-activated receptor γ coactivator 1α(PGC1α),mitochondrial transcription factor A(TFAM),and superoxide dismutase 2(SOD2)were detected by Western blotting and qRT-PCR.Results:The ovarian tissue in model group exhibited few secondary and tertiary follicles,whereas the He's Yangchao recipe groups and Q10 group had abundant secondary and tertiary follicles.Compared with the blank control group,ATP and mtDNA levels in model group decreased(P＜0.01),mitochondrial crista disappeared or abnormal vacuolated structure increased;the protein and mRNA levels of ERβ,PGC1α,TFAM,and SOD2 decreased(all P＜0.01).ATP production increased in granulose cells of high-dose He's Yangchao recipe group and Q10 group;mtDNA copy numbers increased(P＜0.05 or P＜0.01);abnormal mitochondrial structure was reduced;the protein and mRNA expressions of ERβ,PGC1α,TFAM,and SOD2 increased(P＜0.05 or P＜0.01).Compared with the PHTPP intervention group,the proportion of normal mitochondrial structure in the granulose cells of He's Yangchao recipe+PHTPP group was higher;ATP content increased(P＜0.05 or P＜0.01);mtDNA copy numbers increased(P＜0.05 or P＜0.01);the protein and mRNA expression of ERβ,PGC1α,TFAM and SOD2 increased(P＜0.05 or P＜0.01).Conclusions:He's Yangchao recipe can regulate mitochondrial biogenesis through ERβ/PGC1α/TFAM pathway to improve ovarian function in POI mice.

Purpose/Significance To analyze the satisfaction,service effectiveness and willingness to participate in telemedicine services from the perspective of medical staff,and to identify the existing problems.Method/Process The research group conducts an e-lectronic questionnaire survey for medical institutions across the country,and collects a total of 1 524 valid questionnaires.Based on questionnaire survey data,logistic regression models are constructed to analyze the key factors that affect the evaluation and attitude of medical staff.Result/Conclusion The overall satisfaction and service effectiveness of medical staff to telemedicine services are at a high level,and their willingness to participate is strong.It is necessary to improve the telemedicine service system and promote the experience of medical staff by strengthening infrastructure construction,optimizing service process,and perfecting incentive mechanisms.

Objective To investigate the clinical characteristics,treatment and prognosis of tuberculosis in patients with autoimmune diseases after tumor necrosis factor-αinhibitors.Methods Clinical data of 33 patients with TB after biologics(tumor necrosis factor-α inhibitors)treated in Guangzhou Chest Hospital from January 2019 to March 2023 were collected,including 25 males and 8 females,with a median age of 32 years.The clinical symptoms,laboratory results,imaging and tracheoscopic features,pathological features,treatment and outcome were analyzed retrospectively.Results The common clinical manifestations were cough(26/33),sputum(23/33)and fever(17/33).The most common cases were pulmonary tuberculosis(32/33),bronchial tuberculosis(15/33),mediastinum and hilar lymph node tuberculosis(11/33).Bilateral lung spread of tuberculosis(21/33),intrapulmonary spread of tuberculosis(bronchus,mediastinal hilar lymph nodes,pleura)(19/33),extrapulmonary tuberculosis(18/33),pulmonary tuberculosis with intrapulmonary or extrapulmonary tuberculosis(26/33).Blood CD4+T lymphocyte test was normal(23/33),and blood IGRA test was positive(27/33).Pulmonary imaging miliary nodules(8/33).The histopathology of the lymph nodes showed atypical granulomatous nodules.The duration of anti-tuberculosis treatment is 8-32 months.1 case of death.Conclusion Patients with autoimmune diseases complicated with tuberculosis after the application of tumor necrosis fact-α inhibitor are more likely to have double lung lesions,which are easy to spread to lung tissues and multiple organs of the body,and have decreased immune function.Most of them need to extend the treatment course,and the prognosis is generally good after comprehensive treatment.

OBJECTIVE To set up normal ranges for indexes in embryo-fetal development toxicity studies in Sprague-Dawley(SD)rats and to establish a background database to provide reference for the embryo-fetal development toxicity evaluation of drugs.METHODS The data on embryonic develop-ment and fetal growth from embryo-fetal development toxicity studies(11 items)conducted by our center between 2013 and 2022 was statistically analyzed,involving 205 pregnant rats and 3037 fetuses in total,with the mean and standard deviation,coefficient of variation and 95%confidence interval calculated.The indexes included body mass,body mass gain and food consumption during pregnancy,pregnancy outcomes(pregnancy rate,average corpora lutea,average Implant sites,average live conceptuses,live conceptuse rate,resorption rate and dead conceptuse rate),fetal growth and development(fetal mass,placental mass and sex ratio),appearance abnormality rate,visceral abnormality rate,and skeletal abnormality rate.RESULTS The mass of pregnant rats trended up during gestation,with significant increases in the late period.Food consumption increased along with gestation.Caesarean section was conducted on gestation day 20,and the pregnancy rate was 93.2%.The average corpora lutea,Implant sites and live conceptuses were 18.0±3.2,15.9±2.8 and 14.8±3.0,respectively.The live conceptuse rate was 93.4%while the total dead embryo rate was 6.6%.The average mass of fetuses and placenta were respectively 3.6±0.3 and(0.6±0.3)g,and the fetal sex ratio(male/female)was 0.94.The incidence of fetal appearance abnormalities was about 0.2%,and that of soft tissue abnormalities was approximately 0.8%.The rate of skeletal abnormalities was about 1.2%,with higher incidence of non-ossification and incomplete ossification mostly identified on sternum and hyoid bone.The numbers of ossifications of metacarpal bones,metatarsal bones and sacrococcygeal vertebrae were 7.0±0.7,8.0±0.1 and 7.4±0.5,respectively.The rate of ossification of sternumⅠtoⅣwas higher,with an average of about 98.6%-99.9%.The ossification rates of sternum Ⅴ and Ⅵ were(68.0±28.4)%and(82.8±23.9)%.CONCLUSION The background database of indexes in the embryo-fetal development toxicity study on SD rats is established for our GLP laboratory,which provides reference for reproductive toxicity studies.

BACKGROUND: Rheumatoid arthritis (RA), a chronic systemic autoimmune disease, is characterized by synovitis and progressive damage to the bone and cartilage of the joints, leading to disability and reduced quality of life. This study was a randomized clinical trial comparing the outcomes between withdrawal and dose reduction of tofacitinib in patients with RA who achieved sustained disease control. METHODS: The study was designed as a multicenter, open-label, randomized controlled trial. Eligible patients who were taking tofacitinib (5 mg twice daily) and had achieved sustained RA remission or low disease activity (disease activity score in 28 joints [DAS28] ≤3.2) for at least 3 months were enrolled at six centers in Shanghai, China. Patients were randomly assigned (1:1:1) to one of three treatment groups: continuation of tofacitinib (5 mg twice daily); reduction in tofacitinib dose (5 mg daily); and withdrawal of tofacitinib. Efficacy and safety were assessed up to 6 months. RESULTS: Overall, 122 eligible patients were enrolled, with 41 in the continuation group, 42 in the dose-reduction group, and 39 in the withdrawal group. After 6 months, the percentage of patients with a DAS28-erythrocyte sedimentation rate (ESR) of <3.2 was significantly lower in the withdrawal group than that in the reduction and continuation groups (20.5%, 64.3%, and 95.1%, respectively; P  < 0.0001 for both comparisons). The average flare-free time was 5.8 months for the continuation group, 4.7 months for the dose reduction group, and 2.4 months for the withdrawal group. CONCLUSION: Withdrawal of tofacitinib in patients with RA with stable disease control resulted in a rapid and significant loss of efficacy, while standard or reduced doses of tofacitinib maintained a favorable state. TRIAL REGISTRATION Chictr.org, ChiCTR2000039799.
Humans ; Quality of Life ; China ; Arthritis, Rheumatoid/drug therapy* ; Piperidines/therapeutic use* ; Treatment Outcome ; Antirheumatic Agents/therapeutic use* ; Pyrroles/therapeutic use*

Chronic refractory wound (CRW) is one of the most challengeable issues in clinic due to complex pathogenesis, long course of disease and poor prognosis. Experts need to conduct systematic summary for the diagnosis and treatment of CRW due to complex pathogenesis and poor prognosis, and standard guidelines for the diagnosis and treatment of CRW should be created. The Guideline forthe diagnosis and treatment of chronic refractory wounds in orthopedic trauma patients ( version 2023) was created by the expert group organized by the Chinese Association of Orthopedic Surgeons, Chinese Orthopedic Association, Chinese Society of Traumatology, and Trauma Orthopedics and Multiple Traumatology Group of Emergency Resuscitation Committee of Chinese Medical Doctor Association after the clinical problems were chosen based on demand-driven principles and principles of evidence-based medicine. The guideline systematically elaborated CRW from aspects of the epidemiology, diagnosis, treatment, postoperative management, complication prevention and comorbidity management, and rehabilitation and health education, and 9 recommendations were finally proposed to provide a reliable clinical reference for the diagnosis and treatment of CRW.

Basal cell carcinoma has a low mortality rate, but its multiple occurrence, recurrence and metastasis have caused problems for patients and clinical work. In recent years, with the in-depth study of the tumor microenvironment in basal cell carcinoma, previous understanding and treatment concepts for basal cell carcinoma have been changed. This article focuses on the role of tumor microenvironment in the occurrence and development of basal cell carcinoma, and reviews the treatment method based on this.