BACKGROUND:Psoralen has a strong anti-osteoporotic activity and may have a restorative effect on chemotherapy-induced osteoporosis. OBJECTIVE:To explore the restorative effect of psoralen on the osteogenic differentiation of bone marrow mesenchymal stem cells in mice inhibited by cyclophosphamide and its mechanism. METHODS:C57BL/6 mouse bone marrow mesenchymal stem cells were isolated and cultured.Effect of psoralen on viability of bone marrow mesenchymal stem cells was detected by MTT assay.Osteogenic induction combined with alkaline phosphatase staining was used to determine the optimal dose of psoralen to restore the osteogenic differentiation of bone marrow mesenchymal stem cells inhibited by cyclophosphamide.The mRNA expression levels of Runx2,alkaline phosphatase,Osteocalcin,osteoprotegerin,and Wnt/β-catenin signaling pathway-related genes Wnt1,Wnt4,Wnt10b,β-catenin,and c-MYC were measured by RT-qPCR at different time points under the intervention with psoralen.The protein expression of osteogenic specific transcription factor Runx2 and Wnt/β-catenin signaling pathway related genes Active β-catenin,DKK1,c-MYC,and Cyclin D1 was determined by western blot assay at different time points under the intervention with psoralen. RESULTS AND CONCLUSION:(1)There was no significant effect of different concentrations of psoralen on the viability of bone marrow mesenchymal stem cells.The best recovery of the inhibition of osteogenic differentiation of bone marrow mesenchymal stem cells caused by cyclophosphamide was under the intervention of psoralen at a concentration of 200 μmol/L.(2)Psoralen reversed the reduction in osteogenic differentiation marker genes Runx2,alkaline phosphatase,Osteocalcin and osteoprotegerin mRNA expression and Runx2 protein expression in bone marrow mesenchymal stem cells caused by cyclophosphamide conditioned medium.(3)Psoralen reversed the decrease in Wnt/β-catenin pathway-related genes Wnt4,β-catenin,c-MYC mRNA and Active β-catenin,c-MYC,and Cyclin D1 protein expression and the increase in DKK1 protein expression in bone marrow mesenchymal stem cells caused by cyclophosphamide conditioned medium.(4)The results showed that cyclophosphamide inhibited osteogenic differentiation of bone marrow mesenchymal stem cells in mice,and psoralen had a restorative effect on it.The best intervention effect was achieved at a concentration of 200 μmol/L psoralen,and this protective effect might be related to the activation of Wnt4/β-catenin signaling pathway by psoralen.

The neonatal mammalian heart has a remarkable regenerative capacity, while the adult heart has difficulty to regenerate. A metabolic reprogramming from glycolysis to fatty acid oxidation occurs along with the loss of cardiomyocyte proliferative capacity shortly after birth. In this study, we sought to determine if and how metabolic reprogramming regulates cardiomyocyte proliferation. Reversing metabolic reprogramming by carnitine palmitoyltransferase 1 (CPT1) inhibition, using cardiac-specific Cpt1a and Cpt1b knockout mice promoted cardiomyocyte proliferation and improved cardiac function post-myocardial infarction. The inhibition of CPT1 is of pharmacological significance because those protective effects were replicated by etomoxir, a CPT1 inhibitor. CPT1 inhibition, by decreasing poly(ADP-ribose) polymerase 1 expression, reduced ADP-ribosylation of dual-specificity phosphatase 1 in cardiomyocytes, leading to decreased p38 MAPK phosphorylation, and stimulation of cardiomyocyte proliferation. Our present study indicates that reversing metabolic reprogramming is an effective strategy to stimulate adult cardiomyocyte proliferation. CPT1 is a potential therapeutic target for promoting heart regeneration and myocardial infarction treatment.

In the European Guideline on Management of Major Bleeding and Coagulopathy Following Trauma updated recently, there are 39 clinical practice recommendations that follow an approximate temporal path for management of the bleeding trauma patient, with recommendations grouped behind key decision points, including initial resuscitation and prevention of further bleeding, diagnosis and monitoring of bleeding, rapid control of bleeding, initial management of bleeding and coagulopathy, further goal-directed coagulation management, management of antithrombotic agents, thromboprophylaxis, guideline implementation and quality control, as welll as the management of tissue oxygenation, volume, fluids and temperature. In this paper, we introduce the recommendations and rationale of the guideline and add some newly published clinical study evidence. These information would be very helpful to the development and training of the guidelines or protocols for the management of the trauma patient with major haemorrhage and coagulopathy in China.

Objective To explore the teaching effect of case-integrated scenario simulation instruction model on proba-tionary instruction of acute upper gastrointestinal bleeding.Methods A total of 40 medical students of grade 2021 majoring in clinical medicine,namely,Nanshan Class,from Guangzhou Medical University were selected as participants.The students were randomly divided into two groups,with 22 as an experimental group and 18 as a control group.The former group received the case-integrated based scenario simulation teaching model,while the latter adopted the traditional bedside teaching model.The teaching content was on acute non-variceal upper gastrointestinal bleeding.Results There was no statistically significant differ-ence in the total score of gastroenterology between the experimental group and the control group(P＞0.05).The experimental group scored significantly higher in the gastrointestinal bleeding-related contents compared to the control group(P＜0.05).The post-class survey revealed that the majority of the students in the research group expressed their high-level satisfaction with the new instruction model and demonstrated their greater interests in participation in the new instruction model.Conclusion The case-integrated scenario simulation instruction model demonstrates significant superiority to the traditional bedside teaching model in terms of stimulating learning interests,cultivating medical professionalism,and enlivening classroom atmosphere.It is suitable for practical teaching in gastroenterology and can be widely adopted as routine probationary teaching for undergraduate students.

Objective:To build a training and promotion model for traditional Chinese medicine nursing tourism project in Zhejiang Province, promoting homogeneous management and standardized promotion of traditional Chinese medicine nursing tourism project.Methods:From July 2022 to June 2023, purposive sampling was used to select 20 experts from ClassⅢ traditional Chinese medicine hospitals in Zhejiang Province for Delphi expert consultation. Two rounds of consultation were conducted via email to construct a training and promotion model for traditional Chinese medicine nursing tourism project in Zhejiang Province.Results:In the two rounds of expert consultation, the effective response rate of the questionnaire was 100% (20/20), the familiarity coefficient of the experts was 0.89, the judgment coefficient was 0.94, and the authority coefficient of the experts was 0.92. The Kendall harmony coefficients for two rounds of consultation were 0.268 and 0.105, respectively, with statistically significant differences ( P<0.001). The training and promotion model for traditional Chinese medicine nursing tourism project in Zhejiang Province included six first-level indicators, 22 second-level indicators, 74 third-level indicators, and 28 fourth-level indicators. Conclusions:The construction process of the training and promotion model for traditional Chinese medicine nursing tourism project in Zhejiang Province is rigorous and standardized, providing reference for training and helping to promote innovation and sustainable development of traditional Chinese medicine nursing.

Purpose: This study aims to comprehensively evaluate the clinical efficacy of chemotherapy or endocrine therapy maintenance in metastatic breast cancer (MBC) patients. Materials and Methods: The meta-analysis of randomized clinical trials (RCTs) and propensity score matching of multicenter cohort study evaluated MBC patients who underwent first-line chemotherapy or endocrine therapy maintenance. This study is registered with PROSPERO: CRD42017071858 and ClinicalTrials.gov: NCT04258163. Results: A total of 2,867 patients from 15 RCTs and 760 patients from multicenter cohort were included. The results from meta-analysis showed that chemotherapy maintenance improved progression-free survival (PFS) (hazard ratio [HR], 0.63; 95% confidence interval [CI], 0.54 to 0.73; p < 0.001; moderate-quality evidence) and overall survival (OS) (HR, 0.87; 95% CI 0.78 to 0.97; p=0.016; high-quality evidence) than observation. In the cohort study, for hormone receptor–positive MBC patients, chemotherapy maintenance improved PFS (HR, 0.67; 95% CI, 0.52 to 0.85; p < 0.001) and OS (HR, 0.55; 95% CI 0.42 to 0.73; p < 0.001) compared with observation, and endocrine therapy maintenance also improved PFS (HR, 0.65; 95% CI, 0.53 to 0.80; p < 0.001) and OS (HR, 0.55; 95% CI, 0.44 to 0.69; p < 0.001). There were no differences between chemotherapy and endocrine therapy maintenance in PFS and OS (all p > 0.05). Regardless of the continuum or switch maintenance therapy, showed prolonged survival in MBC patients who were response to first-line treatment. Conclusion This study provided evidences for survival benefits of chemotherapy and endocrine therapy maintenance in MBC patients, and there was no difference efficacy between chemotherapy and endocrine therapy maintenance for hormone receptor–positive patients.

Objective:To analyze the characteristics of elderly patients with moyamoya disease and clinical outcomes after combined revascularization, and to evaluate the safety and efficacy of this method in elderly patients.Methods:Moyamoya disease patients aged 60 years or older who had undergone combined revascularization at the Neurosurgery Center of Aeronautical General Hospital from January 2016 to September 2021 were selected as study subjects.Then patients' clinical data and postoperative complications within two weeks of surgery were collected and a followed-up was conducted.The results were compared with those of previous reports.Results:A total of 46 combined revascularization procedures were carried out in 30 patients.The ages at surgery ranged between 60-75 years, with a mean age of(66.1±4.4)years.The rate of complications within two weeks after surgery was 37%, and the most common complication was speech dysfunction, followed by epilepsy and hyperperfusion.No serious complications such as cerebral hemorrhage and death occurred.The follow-up varied between 3-67 months, with an average follow-up time of(26.8±18.4)months.The MRS score was <3 at 3 months after surgery, and there was no death or severe disability.Conclusions:Perioperative complications in elderly patients with moyamoya disease have a higher incidence rate than in other populations, but patients can usually recover after close perioperative management for 2 weeks.The follow-up has demonstrated that outcomes at 3 months and in longer terms after surgery are satisfactory and clinical symptoms will improve significantly.

Objective:To investigate the efficacy and safety of fecal microbiota transplantation (FMT) in the treatment of irritable bowel syndrome (IBS), and to explore the effects of FMT on the gut microbiota of IBS patients.Methods:From September 2016 to August 2017, at Guangzhou First People′s Hospital, 28 hospitalized IBS patients who underwent FMT treatment were enrolled. Before FMT, four and 12 weeks after FMT, all the IBS patients completed the irritable bowel syndrome quality of life scale (IBS-QOL), irritable bowel syndrome severity scoring system (IBS-SSS) and gastrointestinal symptom rating scale (GSRS). 16S rDNA sequencing was performed before FMT and four weeks after FMT. The effects of FMT on gut microbiota diversity and microbiota structure of IBS patients were analyzed respectively from the level of phylum, family and genus, and linear discriminant analysis effect size (LEfSe) was further used to screen the different bacteria. Paired t test and paired rank sum test were used for statistical analysis. Results:Twelve weeks after FMT, the scores of the six dimensions of IBS-QOL including dysthymia, behavioral disorder, auto imagery, health concerns, eating avoidance, and relationship expansion were all lower than those before FMT (43.750, 22.656 to 56.250 vs. 48.438, 32.031 to 60.938; 37.500, 18.750 to 56.250 vs. 46.429, 21.429 to 62.500; 31.250, 14.063 to 42.188 vs. 31.250, 18.750 to 50.000; 41.667, 27.083 to 56.250 vs. 50.000, 41.667 to 66.667; 54.167, 43.750 to 72.917 vs. 66.667, 58.333 to 83.333; 8.333, 0.000 to 33.333 vs. 16.667, 8.333 to 33.333, respectively), and the differences were statistically significant ( Z=-2.157, -3.429, -2.274, -3.197, -3.042 and -2.329, all P<0.05). Twelve weeks after FMT, the scores of the two dimensions of IBS-QOL including behavioral disorder and relationship expansion were both lower than those of four weeks after FMT (37.500, 18.750 to 56.250 vs. 39.286, 19.643 to 62.500 and 8.333, 0.000 to 33.333 vs. 16.670, 2.083 to 41.667, respectively), and the differences were statistically significant ( Z=-1.998 and -2.110, both P<0.05). Four and 12 weeks after FMT, the scores of IBS-SSS and GSRS were both lower than those before FMT ((190.32±106.51), (201.43±102.48) vs. (245.93±86.10) and 5.50, 4.00 to 9.00 and 5.50, 4.00 to 8.75 vs. 7.00, 6.00 to 9.75), and the differences were statistically significant ( t=4.402 and 3.848, Z=-3.081 and -3.609; all P<0.01). No serious adverse reactions occurred in the patients after FMT. At the phylum level, after FMT the abundance of Verrucomicrobia in the feces of IBS patients was richer than that before FMT (6.74% vs. 0.37%); at the family level, after FMT the abundance of Verrucomicrobiaceae in the feces of IBS patients was richer than that before FMT (6.74% vs. 0.37%); at the genus level, after FMT the abundance of Akkermansia was richer than that before FMT (6.74% vs. 0.37%); and the differences were statistically significant (all Z=-2.589, all P=0.010). The results of LEfSe method indicated that four weeks after FMT the abundance of Akkermansia in the gut microbiota of IBS patients was richer than that before FMT (6.74% vs. 0.37%), and the difference was statistically significant (linear discriminant analysis value=4.5, P=0.049). Conclusions:FMT is safe and effective in the treatment of IBS. The mechanism may be through upregulating the diversity of gut microbiota and changing the structure of gut microbiota of IBS patients.

The purpose of this study was to investigate the NOAEL of the nickel ion and provide with basic data for the biological evaluation of those medical devices containing nickel. Five groups SD rats were repeatedly exposed during 14 d respectively to nickel at first stage doses of 4.9, 3.7, 2.5 mg/(kg.d), and the second stage doses of 1.2, 0.25 mg/(kg.d) by the intravenous route. The results showed that the NOAEL of nickel ion is 0.25 mg/(kg.d) for SD rats, and the result was verified by subchronic systemic toxicity test of nickel alloy. The threshold of toxicological concern (TTC) of nickel is 150 μg/d (based on application of 100-fold uncertainty factor and a body weight of 60 kg)deduced by these data.
Animals ; Equipment and Supplies/adverse effects* ; Nickel/toxicity* ; No-Observed-Adverse-Effect Level ; Rats ; Rats, Sprague-Dawley ; Risk Assessment

We analyzed the clinicopathological data of 3 cases of primary intraosseous hematopoietic pseudotumor (IHPT), which had been previously misdiagnosed as malignancies or metastases both clinically and pathologically. Two of the patients received close follow-up for 132 and 100 months, and one patient was lost to follow-up, and the tumors were confirmed to be benign in all the 3 cases. IHPT is a rare benign intraosseous solid lesion consisting of tissues resembling normal hematopoietic tissue, and can be easily misdiagnosed as malignancy. Understanding the clinicopathological features and the outcomes of the disease can facilitate the clinical decisions on individualized diagnosis and therapeutic regimens.
Bone Marrow ; Follow-Up Studies ; Hematopoietic Stem Cell Transplantation ; Humans