Objective To investigate the safety and efficacy of mechanical thrombectomy combined with umbilical cord blood mononuclear cell microtransplantation in the treatment of patients with acute ischemic stroke due to large vessel occlusion. Methods A prospective study was conducted among 61 patients with acute ischemic stroke due to large vessel occlusion in the anterior intracranial circulation who underwent mechanical thrombectomy in our hospital from February 2021 to February 2023， and they were randomly divided into experimental group and control group. The patients in the experimental group underwent mechanical thrombectomy combined with umbilical cord blood mononuclear cell microtransplantation， while those in the control group underwent mechanical thrombectomy alone， and there was no difference in conventional drug treatment between the two groups. The Mann-Whitney U test， chi-square test， and logistic regression analysis were used， with P<0.05 indicating statistical significance. Results There were no significant abnormalities in blood tests and imaging findings in either group at 90 days and 6 months after treatment. There was no significant difference in the degree of neurological deficit （NIHSS score） between the two groups before surgery and on days 1，3，7， and 30 after surgery （P>0.05）. The experimental group had a higher overall response rate （the proportion of patients with an mRS score of ≤2 on day 90 after surgery） than the control group [41.4% （12/29） vs 32.2% （10/31）， P>0.05]. There was no significant difference in limb motor function [Fugl-Meyer Assessment （FMA） score] between the two groups before surgery（P>0.05）， and the experimental group had a better FMA score than the control group on day 90 after surgery（P<0.05）. Conclusion Mechanical thrombectomy combined with umbilical cord blood mononuclear cell microtransplantation can effectively improve the long-term functional prognosis of patients， with a favorable safety profile.

Bariatric and metabolic surgery has become a primary treatment for decompensated obesity, with the number of procedures rapidly increasing in China in recent years. Various improved and novel surgical techniques have emerged. Given the characteristics of the Chinese obese population lower body mass index compared to Western populations and frequent pancreatic islet dysfunction laparoscopic Roux-en-Y gastric bypass remains one of the mainstream procedures in China. Although the Procedural Guideline for Laparoscopic Roux-en-Y Gastric Bypass (2019 Edition) has provided standardized surgical steps, mastering and routinely implementing the procedure in clinical practice continues to pose significant challenges. Compared to laparoscopic sleeve gastrectomy, laparoscopic Roux-en-Y gastric bypass is more technically demanding and requires a longer learning curve. To avoid suboptimal weight loss or severe postoperative complications resulting from non-standardized techniques, this article summarizes the authors' clinical experience, emphasizing key technical steps: creation of the gastric pouch, standardization of gastrojejunal and jejunojejunal anastomoses, hiatal closure, and full serosalization. These insights aim to improve procedural safety and therapeutic efficacy by offering a set of practical process optimization strategies.
Humans ; Gastric Bypass/methods* ; Laparoscopy/methods* ; Obesity, Morbid/surgery* ; Postoperative Complications/prevention & control* ; China ; Jejunum/surgery* ; Gastrectomy/methods* ; Anastomosis, Surgical/methods* ; Weight Loss

The unique characteristics of the deep space environment, microgravity, cosmic radiation, and extreme temperature fluctuations, are emerging as major driving forces for pharmaceutical innovation. These factors provide new avenues for optimizing drug formulations, improving crystal structure quality, and accelerating the discovery of therapeutic targets. Advances in deep space research not only help overcome critical bottlenecks in terrestrial drug development but also promote progress in structure-based drug design and deepen understanding of cellular stress-response mechanisms. Current progress in space-based pharmaceutical research primarily includes the study of disease mechanisms under microgravity, protein crystallization in microgravity, and drug development utilizing deep space radiation and resources. However, the operational complexity, high costs, and limited data reproducibility of space experiments remain key challenges hindering widespread application. Looking ahead, with the integration of automation, artificial intelligence analysis, and on-orbit manufacturing, deep space drug development is expected to achieve greater scalability and precision, opening a new frontier in biopharmaceutical science.
Drug Design ; Drug Development/methods* ; Humans ; Weightlessness ; Space Flight ; Artificial Intelligence ; Extraterrestrial Environment

Objective To explore the protective effect of hydroalcoholic extract of Portulaca oleracea L.(POHA)on ulcerative colitis(UC)and bone loss in mice.Methods The C57BL/6 mice were treated with dextran sulfate sodium(DSS)to establish UC model.A total of 50 mice were randomly assigned to including control group,DSS group,mesalazine(MS)group,low dose of POHA(POHAL)group,or high dose of POHA(POHAH)group.The control group freely drank drinking water,while the DSS,MS,POHAL and POHAH groups drank drinking water containing DSS for 8 weeks.Since the 2nd week,the control group and DSS group were given normal saline by gavage.The MS group was given MS(100 mg/kg)by gavage.The POHAL group and POHAH group were given POHA(1 000 mg/kg and 2 000 mg/kg)by gavage,respectively.Body weight and disease activity index(DAI)were recorded and calculated every 2 d.On the 56th day,the colon weight index,liver index,and spleen index were calculated,and the histological changes of colon were observed.Serum levels of bone metabolism markers and microstructure parameters of femur were detected.Results Compared with the control group,the DSS group showed significantly increased DAI score,colon weight index,liver index,and spleen index(all P＜0.01).The DSS group exhibited significant pathological damage in colon tissues and significantly increased serum levels of osteocalcin,C-terminal peptide of collagen type Ⅰ,and tartrate-resistant acid phosphatase 5b(P＜0.01).The bone loss was significant in the DSS group,manifested by markedly decreased bone mineral density(BMD),bone tissue volume to tissue volume ratio(BV/TV),trabecular bone number(Tb.N),and trabecular bone thickness(Tb.Th),and markedly increased bone surface to bone volume ratio(BS/BV)and trabecular bone separation(Tb.Sp)(P＜0.05 or P＜0.01).Compared with the DSS group,the BMD,BV/TV,Tb.N and Tb.Th of the femur in the MS group and POHAH group of mice were all increased(P＜0.05 or P＜0.01),the BS/BV all decreased(P＜0.05 or P＜0.01),and the Tb.Sp all decreased without significant differences(all P＞0.05).The above bone microstructure parameters in the POHAL group showed no significant differences compared with those in the DSS group(all P＞0.05).Conclusion POHA has protective effect on DSS-induced UC and bone loss,and the mechanism may be related to the inhibition of hyperactive bone metabolism.

In ground-based experiments,ultraviolet irradiation is used to charge simulated lunar dust,aiming to quantitatively study its charging and discharging behavior in space environments.However,due to factors such as vacuum and dust disturbances,the charging and discharging processes of lunar dust are difficult to measure accurately through contact methods.Therefore,this paper designs and constructs a non-contact,in-situ surface potential measurement system based on the principle of vibrating capacitance,suitable for vacuum environments.The system combines moving average and standard deviation methods for data filtering and introduces a weighted KNN algorithm to predict and compensate for missing or anomalous data,thereby improving measurement accuracy and stability.Two typical simulated lunar dust samples,TYII-2 and CLRS-1A,were selected for charging and discharging experiments under ultraviolet irradiation.The surface potential distribution was obtained in real-time using an in-situ motion mechanism equipped with a vibrating capacitance sensor.The results show significant differences in the charging response and dissipation characteristics of the samples with different particle size distributions.

The U.S.Department of Defense(DoD)has made tremendous efforts to build up its biological defense capability in recent years,so that the annual biological defense budget accounts for 14％to 15％of the total of the U.S.government,which is closely related to the rapid development of biotechnology and its strategic significance during the rival between world powers.A second contributor is that the United States has been seeking hegemony in the biological field.In fiscal year 2019-2024,the expenditure/budget of the US DoD's biological defense spikedwith the layout focused on early warning of threats,pathogen detection and response,and capability enhancement.This initiative is characterized by simultaneous implementation of multiple projects in a wide range of fields,strong synergy between different agencies,integration of military and civil resources,systematic planning of support systems for biological defense technologies.

Objective:To evaluate the survival benefit of surgical treatment for intrahepatic cholangiocarcinoma.Methods:This study is conducted based on the hepatobiliary tumor registry database. From May 2009 to December 2022,a total of 704 patients who were initially diagnosed with intrahepatic cholangiocarcinoma and underwent liver resection were consecutively enrolled at the Hepatobiliary Center of the First Affiliated Hospital of Nanjing Medical University. Among them,there were 380 males and 324 females,aged ( M(IQR)) 61(15) years(range:27 to 88 years). Twenty-six (3.7%) patients received neoadjuvant therapy before surgery. The overall survival(OS) and disease-free survival(DFS) rates were estimated by life table method, and Kaplan-Meier survival curves were plotted. Log-rank test was used to compare the survival difference among tumor-node-metastasis(TNM) staging or three periods. The OS and DFS differences among lymph node groups or adjuvant treatment groups were quantified as HR with 95% CI estimated using Cox proportional-hazards model with adjustment for prognostic factors. Results:Among the 704 patients,349 cases(49.6%) underwent major hepatectomy (≥3 segments),331(47.0%) had lymph node resection during surgery,and 524 cases(74.4%) achieved R0 resection. The morbidity of Clavien-Dindo grade Ⅲ or higher complications was 16.5%(116/704),with a mortality rate of 3.0%(21/704) within 30 days post-surgery. The median OS time was 27.1 months, and the OS rates at 1-,3-,5- and 10-year were 69.1%, 42.4%,34.1% and 24.5%,respectively. The median DFS time was 10.5 months,and the corresponding DFS rates were 46.0%,25.4%,21.9% and 16.9%,respectively. According to the 8 th edition of AJCC staging system, the 5-year survival rates for ⅠA,ⅠB,Ⅱ,ⅢA,ⅢB and Ⅳ were 68.4%, 43.2%, 30.3%,32.2%,14.0% and 0,respectively. The corresponding DFS rates were 55.8%, 28.1%,13.8%,21.2%,3.3% and 0,respectively. There were no statistically significant differences of OS or DFS between stage ⅠB and Ⅱ, stage ⅠB and ⅢA, or between stage Ⅱ and ⅢA(Log-rank test:all P>0.05),while there were significant differences of OS and DFS among other stages(Log-rank test:all P<0.05). Using Cox model with adjustment for prognostic factors, there were no statistically significant differences of OS and DFS between non-lymphadenectomy group or the biopsy-N0 group and dissection-N0 group(both P>0.05). However,the overall and disease-free survival of the biopsy-N1 group or dissection-N1 group were worse than those of dissection-N0 group(both P<0.05),with overall survival being better in dissection-N1 group than biopsy-N1 group( P=0.017). Overall survival in the period from 2019 to 2022 were significantly superior to that during the periods from 2009 to 2013 and 2014 to 2018(both P<0.01). Adjusting for prognostic factors, the disease-free and overall survival of the postoperative adjuvant therapy group were significantly better than those of the observation group in the period 2019 to 2022(both P<0.01). Conclusions:Surgery remains a milestone for achieving long-term survival for patients with intrahepatic cholangiocarcinoma. Regional lymph node dissection is required for patients with lymph node metastasis. Adjuvant therapy can significantly reduce tumor recurrence and prolong overall survival.

Objective To evaluate the efficacy and safety of enteric-coated metformin hydrochloride capsules(Junlida?)in patients with T2DM and poor glycemic control under lifestyle interventions.Methods In this study,419 patients with T2DM were recruited from 15 research centers from July 2020 to March 2022,and randomly divided into observation(Obs)group(n=209)and control group(Con,n=210)using a multicenter,randomized,double-blind,non-inferiority trial design.Patients in the Obs group were treated with enteric-coated Metformin hydrochloride capsules(Junlida?),and patients in the Con group were treated with Metformin hydrochloride tablets(Glucophage?).The optimal effective dose of 2 g/d was achieved within 4 weeks,and the reasonable dose was maintained until the end of treatment.The treatment period was 24 weeks.HbA1c and its compliance rate,FPG,and body weight were compared between the two groups in full analysis set(FAS)and protocol set(PPS).Safety and adverse events(AE)were evaluated in safety set(SS).Results A total of 414 participants were randomized(207 cases in Obs group and 207 cases in Con group).414 cases in FAS population(207 cases in Obs group and 207 cases in Con group),and 328 cases in PPS population(164 cases in Obs group and 164 cases in Con group),and 414 cases in SS population(207 cases in Obs group and 207 cases in Con group).After treatment,HbA1c,FPG and body weight were lower in both groups(P<0.05)in FAS and PPS.HbA1c compliance rate was not significantly different between the two groups in FAS and PPS(P>0.05).The results of non-inferiority test showed that the lower limit was>-0.4%in both FAS(-0.154,95%CI-0.384～0.069)and PPS(-0.139,95%CI-0.390～0.112),and the Obs group reached non-inferiority end point.The achievement rate,compliance rate,safety index and incidence of AE were not significantly different between the two groups(P>0.05).Conclusions Junlida? demonstrated non-inferiority to Glucophage? in glycemic control and can be safely and effectively used in patients with diabetes.

Obesity has become a global public health crisis,attracting significant attention due to its association with metabolic syndrome,cardiovascular diseases,type 2 diabetes,and various cancers.Bariatric-metabolic surgery,as a long-term effective method for weight management,can significantly reduce visceral and subcutaneous fat,improving metabolic health.However,it is also crucial to recognize the postoperative decline in muscle mass and bone density,which can lead to a series of related issues,adversely affecting patients' physical health and quality of life.Given this complex clinical reality,research on postoperative body composition changes becomes particularly important.Here,the authors systematically summarize the characteristics of body composition changes at different stages after bariatric-metabolic surgery,delves into the clinical significance of body composition loss,and provides a forward-looking perspective on the future development of this field,aiming to develop more scientific and reasonable postoperative management strategies for clinical practice.

Background and Aims:Sleeve gastrectomy(SG)has become the most widely performed bariatric procedure worldwide,but postoperative gastroesophageal reflux disease(GERD)remains a major concern.This multicenter study aimed to identify independent risk factors associated with GERD after SG to guide preoperative assessment and intraoperative management.Methods:Clinical data of 672 patients who underwent SG between January 2020 and December 2022 in six bariatric centers and completed a 12-month follow-up were retrospectively analyzed.Demographic characteristics,esophagogastric junction(EGJ)integrity graded by the AFS system,operative parameters,and postoperative outcomes were compared between patients with and without GERD.Multivariate logistic regression was used to identify predictors of postoperative GERD.Results:The overall incidence of GERD after SG was 24.7%(166/672).Multivariate analysis revealed that a preoperative BMI>35 kg/m2(OR=1.68,P=0.033),EGJ integrity AFS grade>2(OR=2.90,P=0.006),and preoperative reflux symptoms(OR=2.44,P=0.030)were independent risk factors for GERD.A staple line more than 1 cm from the angle of His(OR=0.45,P<0.001)and a bougie size>36 Fr(OR=0.08,P=0.001)were protective factors.Conclusion:High BMI,impaired EGJ integrity,and preoperative reflux symptoms significantly increase the risk of GERD after SG,whereas adequate preservation of the His angle and appropriate bougie calibration may reduce it.Comprehensive preoperative EGJ assessment and standardized surgical techniques are essential for minimizing postoperative reflux.