The ethical review exemption system was introduced to meet the needs of modernized ethical governance， implement hierarchical management for ethical review projects involving human subjects， and explore an ethical management model that reduces procedural supervision for specific types of research involving no greater than minimal risk. Through a comparative study， this paper seeks to elaborate on the differences between China and the United States （US） in the ethical review exemption system from multiple aspects， such as ethical regulations， risk definition， preconditions， applicable scenarios， and operational procedures. The aim is to provide references for ethical review committees to better implement the ethical review exemption system， enhance policy research， and ensure the fairness and objectivity of ethical review. Through the comparative study of the ethics review exemption system in China and the US， the following recommendations are proposed for institutions implementing the ethical review exemption system for reference. First， the system should clearly define the meaning of ethical review exemption to prevent researchers or even committee members from misunderstanding it as falling outside the scope of ethical review， thereby exposing research participants’ rights and interests to unnecessary risks. Second， the system should specifically explain the preconditions， including the requirements for research types and research risks. Among them， risks should be considered from multiple dimensions such as physiology， psychology， society， and economy. Clear explanations should be provided for involving commercial interests and sensitive personal information. Finally， the system should establish basic principles and judgment criteria for applicable scenarios， including specifying exactly what the public data refers to and legal requirements that need to be met， providing a concept of anonymization to distinguish it from deidentified information data， and clarifying the relevant regulations and ethical principles to be followed， as well as the clear requirements for informed consent.

Objective: To develop QingNangTCM, a specialized large language model (LLM) tailored for expert-level traditional Chinese medicine (TCM) question-answering and clinical reasoning, addressing the scarcity of domain-specific corpora and specialized alignment. Methods: We constructed QnTCM_Dataset, a corpus of 100 000 entries, by integrating data from ShenNong_TCM_Dataset and SymMap v2.0, and synthesizing additional samples via retrieval-augmented generation (RAG) and persona-driven generation. The dataset comprehensively covers diagnostic inquiries, prescriptions, and herbal knowledge. Utilizing P-Tuning v2, we fine-tuned the GLM-4-9B-Chat backbone to develop QingNangTCM. A multi-dimensional evaluation framework, assessing accuracy, coverage, consistency, safety, professionalism, and fluency, was established using metrics such as bilingual evaluation understudy (BLEU), recall-oriented understudy for gisting evaluation (ROUGE), metric for evaluation of translation with explicit ordering (METEOR), and LLM-as-a-Judge with expert review. Qualitative analysis was conducted across four simulated clinical scenarios: symptom analysis, disease treatment, herb inquiry, and failure cases. Baseline models included GLM-4-9B-Chat, DeepSeek-V2, HuatuoGPT-II (7B), and GLM-4-9B-Chat (freeze-tuning). Results: QingNangTCM achieved the highest scores in BLEU-1/2/3/4 (0.425/0.298/0.137/0.064), ROUGE-1/2 (0.368/0.157), and METEOR (0.218), demonstrating a balanced and superior normalized performance profile of 0.900 across the dimensions of accuracy, coverage, and consistency. Although its ROUGE-L score (0.299) was lower than that of HuatuoGPT-II (7B) (0.351), it significantly outperformed domain-specific models in expert-validated win rates for professionalism (86%) and safety (73%). Qualitative analysis confirmed that the model strictly adheres to the “symptom-syndrome-pathogenesis-treatment” reasoning chain, though occasional misclassifications and hallucinations persisted when dealing with rare medicinal materials and uncommon syndromes. Conclusion Combining domain-specific corpus construction with parameter-efficient prompt tuning enhances the reasoning behavior and domain adaptation of LLMs for TCM-related tasks. This work provides a technical framework for the digital organization and intelligent utilization of TCM knowledge, with potential value for supporting diagnostic reasoning and medical education.

Objective: To investigate the distribution frequency and molecular mechanism of the rare blood type Lu(a-b-) in Shenzhen, and to compare the polymorphisms of the Lutheran blood group system encoding gene LU and the In (Lu) phenotype-related gene KLF1 among Han Chinese, Indian, and Uyghur populations in Xinjiang. Methods: Serological methods were used to screen the Lu(a-b-) phenotype of blood donors in Shenzhen. Third-generation sequencing was employed to sequence the full-length of the LU and KLF1 genes in Lu (a-b-) phenotype samples as well as the samples from the Han Chinese, Indians, and Uyghur population, followed by analysis of gene haplotypes frequencies. Results: Ten individuals with the Lu(a-b-) phenotype were screened out of 14 367 blood donors in Shenzhen, yielding a frequency of approximately 0.07%. Only 2 cases showed mutations in the coding region of the LU gene, while all individuals showed heterozygous mutations in the coding region of the KLF1 gene. The highest mutation frequencies of the LU and KLF1 genes were observed in the Uyghur population in Xinjiang and the Han Chinese in Shenzhen, respectively. Conclusion: All Lu(a-b-) phenotypes are of the In (Lu) type, and their formation mechanism is mainly related to KLF1 gene mutations. Both the LU and KLF1 genes exhibit significant polymorphism in the Han Chinese, Indians, and Uyghur populations.

A case of 75-year-old male patient was admitted to the Second Affiliated Hospital of Harbin Medical University on June ,2024 complaining 'repeated cough for half a year', accompanied by night fever, night sweats, fatigue, weight loss. He was initially diagnosed as diffuse large B-cell lymphoma through chest CT and bronchoscopic biopsy, then confirmed as diffuse large B-cell lymphoma with MYD88 genetic aberration with bone marrow inconsistent involvement by PET-CT, bone marrow biopsy, immunohistochemistry(IHC),FISH and other tests. The R-CHOP was given as first-line regimen treatment immediately, but the patient appeared allergyic to Rituximab and Zuberitamab sequencially, therefore we change the plan to CDOP for continued chemotherapy and discharged after remission. In his regular admission, we give G-CHOP regimen for chemotherapy, no adverse reactions were found.

Objective:To explore the effect of EAERI (E: environment; A: accompany; E: emotion; R: respect; I: information) support strategies in the application of nurse second victims in restoring the passage of a patient safety incident, and to provide support to nurse second victims experiencing a safety incident in restoring the incident and mitigating secondary victimization from the incident.Methods:The method of historical comparison was adopted. A convenience sampling method was used to select nurses who experienced patient safety events in Shanxi Bethune Hospital (Shanxi Academy of Medical Sciences) from January 2023 to February 2024 as the study subjects, which were divided into observation group and control group by the historical control grouping method. The observation group used the EAERI support strategy for patient safety incident reduction, and the control group used the conventional reduction method. The second victims of the nurses in both groups were assessed for their level of harm and support in the patient safety incident using the Second Victim Experience and Support Tool before and after the event reduction, respectively.Results:A total of 124 second victims completed the study. There were 63 cases in the control group, including 13 males and 50 females, with an age of (30.24 ± 4.91) years old. There were 20 males and 41 females in the observation group, with an age of (30.85 ± 5.50) years old. Before the restoration event, there was no significant differences in the total scores of victim experience and support, the degree of injury and the degree of support between the two groups (all P>0.05). The total scores of victim experience and support, the degree of injury and the degree of support were (89.35 ± 10.69), (44.57 ± 6.19), (44.78 ± 9.40) points in the control group, and (64.13 ± 9.36), (33.56 ± 8.84), (30.56 ± 3.17) points in the observation group. The differences were significant between the two groups ( t=14.02, 8.07, 11.29, all P<0.01). Conclusions:The EAERI support strategy is feasible and effective. The implementation of the EAERI support strategy can reduce the degree of injury when the second victim of the nurse restores the safety incident and improve the degree of support.

Objective To develop a nomogram-based predictive model for assessing the risk of respiratory distress syndrome(RDS)in premature infants in the high-altitude region of Dali.The predictive performance and clinical applicability of the model will be systematically evaluated to provide evidence-based guidance for the early diagnosis and clinical management of respiratory distress in premature infants.Methods A total of 680 preterm infants admitted to the Dali Maternal and Child Health Hospital between January 2020 and December 2024 were enrolled in the study and randomly divided into a training set(n=476)and a validation set(n=204)at a ratio of 7∶3.Independent predictors were identified through univariate logistic regression and multivariate stepwise regression analyses,and a nomogram model was subsequently developed using R software.The performance of the model,including its discrimination,calibration,stability,and clinical applicability,was evaluated using the receiver operating characteristic curve(ROC),Hosmer-Lemeshow goodness-of-fit test,bootstrap resampling method,and decision curve analysis(DCA).Results The final model incorporated seven independent variables:gestational age,birth weight,Apgar score,blood oxygen saturation,gestational hyperglycemia,prenatal glucocor-ticoid therapy,and maternal history of infection.The areas under the curve(AUCs)for the training and validation sets were 0.88(95%CI:0.84～0.92)and 0.83(95%CI:0.76～0.89),respectively,with all Hosmer-Lemeshow test p-values exceeding 0.05.The bootstrap-corrected AUC was 0.85(95%CI:0.81～0.89).DCA indicated that the model achieved the highest net benefit at a risk threshold range of 10%to 35%.Conclusions This model integrates multiple risk factors associated with the occurrence of RDS in plateau environments,demonstrating robust predictive performance for RDS in preterm infants residing in high-altitude areas such as Dali.It can serve as a valuable tool for risk stratification and clinical decision-making,and may also provide a reference for future multicenter prospective studies.

This study investigates the pharmacokinetics and metabolic characteristics of three marine-derived piericidins as potential drug leads for kidney disease: piericidin A (PA) and its two glycosides (GPAs), glucopiericidin A (GPA) and 13-hydroxyglucopiericidin A (13-OH-GPA). The research aims to facilitate lead selection and optimization for developing a viable preclinical candidate. Rapid absorption of PA and GPAs in mice was observed, characterized by short half-lives and low bioavailability. Glycosides and hydroxyl groups significantly enhanced the absorption rate (13-OH-GPA > GPA > PA). PA and GPAs exhibited metabolic instability in liver microsomes due to Cytochrome P450 enzymes (CYPs) and uridine diphosphoglucuronosyl transferases (UGTs). Glucuronidation emerged as the primary metabolic pathway, with UGT1A7, UGT1A8, UGT1A9, and UGT1A10 demonstrating high elimination rates (30%-70%) for PA and GPAs. This rapid glucuronidation may contribute to the low bioavailability of GPAs. Despite its low bioavailability (2.69%), 13-OH-GPA showed higher kidney distribution (19.8%) compared to PA (10.0%) and GPA (7.3%), suggesting enhanced biological efficacy in kidney diseases. Modifying the C-13 hydroxyl group appears to be a promising approach to improve bioavailability. In conclusion, this study provides valuable metabolic insights for the development and optimization of marine-derived piericidins as potential drug leads for kidney disease.
Animals ; Male ; Mice ; Aquatic Organisms/chemistry* ; Biological Availability ; Cytochrome P-450 Enzyme System/metabolism* ; Glucuronosyltransferase/metabolism* ; Microsomes, Liver/metabolism* ; Molecular Structure ; Biological Products/pharmacokinetics* ; Pyridines/pharmacokinetics*

Objective:To explore the distribution characteristics of Mycoplasma pneumoniae (MP) antibody detection data in hospital, provide data reference for the prevention and control of MP infections.Methods:A single-center retrospective study was conducted on 20 639 patients with suspected Mycoplasma pneumoniae (MP) infection from March 2017 to February 2024 at the outpatient, emergency, and inpatient departments of Peking University Third Hospital. The age range was from 0 to 105 years, with 11 286 males and 9 353 females. The passive agglutination method was used to detect MP antibodies in patient serum, and SPSS 22.0 statistical software was used for statistical analysis. The χ2 test was used to analyze the differences in positive rates of MP antibodies among different genders, age groups, seasons, years, and antibody titers. The trend χ2 test was used to analyze the trend of detection rates with age changes. Results:Among the 20 639 patients, the positive rate of MP antibodies was 23.19%(4 786/20 639), with a higher positive rate in females was 27.16%(2 540/9 353) compared to males (19.90%, 2 246/11 286; χ2=151.191, P<0.01). The positive rate in children was 37.13%(2 731/7 356)significantly higher than in adults(15.47%, 2 055/13 283; χ2=1 246.433, P<0.01). The 6 to <12 year age group (63.11%, 1 223/1 938) had the highest positive rate of MP antibodies, followed by 12 to <18 year old group (56.78%, 385/678). The positive rate of MP antibodies increased with age from 0 to 12 years old but gradually decreased after 12 to <18 years old ( χ2=3 848.393, P trend<0.01). The annual MP antibody positivity rates from 2017 to 2023 were 26.92%, 29.23%, 27.46%, 18.43%, 17.16%, 11.89%, and 23.72%, respectively, with statistically significant differences among the years ( χ2=387.519, P<0.01). The MP antibody positive rate was high in autumn over the course of 7 years ( χ2=242.560, P<0.01). The positive rates of MP antibodies for the years 2017-2019, 2020-2022, and 2023-2024 are (28.00%, 16.60%, 21.84%), respectively, with statistically significant differences among the three periods( χ2=295.845, P<0.01).The monthly positive rates of MP antibody in different years were (5.63% to 43.11%). In the MP antibody titer, qualitative testing was conducted on 4 563 patients and 16 076 patients had a semi-quantitative MP antibody titer of ≥1∶160 with a positive rate of 16.03%(2 577/16 076). Among the proportion of children with high titers of MP antibodies ≥1∶1 280 was 11.11%(798/7 182). Conclusion:The positive rates of MP antibodies in hospital in the Beijing area vary among different genders, ages, and seasons, with a higher incidence in autumn, mainly among children and adolescents.

Spine fracture and dislocation are common traumatic spinal conditions that often require surgical intervention due to compromised spinal stability. Surgical approaches include anterior, posterior, and combined anterior-posterior spinal procedures. According to the specific surgical requirements, patients may be placed in the prone position or repositioned between prone and supine positions during surgery. Intraoperative repositioning has become an essential step in patient positioning. However, during repositioning, patients with spinal fracture and dislocation are at increased risk for complications such as hemodynamic instability, nerve injury, and pressure injuries to the skin and soft tissue. Notably, due to the instability of the spinal cord, even minor manipulations can further exacerbate the damage, potentially leading to severe outcomes like paraplegia. Although the current clinical guidelines provide instructive recommendations for standard position, there remains no specific protocols for intraoperative repositioning in patients with spine fracture and dislocation. With a concern for the lack of clinical studies on positioning techniques, risk prevention, and operational norms for special patients, no applicable guidelines or standards are available. A consensus was required to provide clinical reference, meet the requirements of surgical treatment, and minimize the safety risks of patients caused by improper placement of positions. Professional Committee of Operating Room Nursing of Shaanxi Nursing Association organized experts in nursing management and operating room nursing from major hospitals across China to formulate Expert consensus on intraoperative repositioning for patients with spinal fracture and dislocation ( version 2025). The consensus provides 11 recommendations covering pre-repositioning preparation, intraoperative maneuvers, and post-repositioning observation, aiming to provide references for clinical standardization of the intraoperative repositioning process and protection of patients′ safety.

The paper reports a 32-year-old female acute myeloid leukemia patient who developed graft-versus-host disease after paternal hematopoietic stem cell transplantation, which subsequently led to renal thrombotic microangiopathy. She subsequently required a kidney transplant from the same donor 5 years later due to renal failure. Considering that both the bone marrow and kidney were from the same donor and the recovery of renal function was favorable, immunosuppressive therapy was discontinued after a short course of anti-rejection treatment, with maintained stable kidney function. This case suggests that under the condition of high chimerism, allogeneic hematopoietic stem cell transplantation and kidney transplantation from the same donor can achieve immune tolerance, potentially improving solid organ transplantation success rate. The findings provide a novel therapeutic approach for solid organ transplantation following allogeneic hematopoietic stem cell transplantation.