Umbilical cord mesenchymal stem cells (UC-MSCs) have been widely used in regenerative medicine, but there is limited research on the stability of UC-MSCs formulation during production. This study aims to assess the stability of the cell stock solution and intermediate product throughout the production process, as well as the final product following reconstitution, in order to offer guidance for the manufacturing process and serve as a reference for formulation reconstitution methods. Three batches of cell formulation were produced and stored under low temperature (2-8 ℃) and room temperature (20-26 ℃) during cell stock solution and intermediate product stages. The storage time intervals for cell stock solution were 0, 2, 4, and 6 h, while for intermediate products, the intervals were 0, 1, 2, and 3 h. The evaluation items included visual inspection, viable cell concentration, cell viability, cell surface markers, lymphocyte proliferation inhibition rate, and sterility. Additionally, dilution and culture stability studies were performed after reconstitution of the cell product. The reconstitution diluents included 0.9% sodium chloride injection, 0.9% sodium chloride injection + 1% human serum albumin, and 0.9% sodium chloride injection + 2% human serum albumin, with dilution ratios of 10-fold and 40-fold. The storage time intervals after dilution were 0, 1, 2, 3, and 4 h. The reconstitution culture media included DMEM medium, DMEM + 2% platelet lysate, 0.9% sodium chloride injection, and 0.9% sodium chloride injection + 1% human serum albumin, and the culture duration was 24 h. The evaluation items were viable cell concentration and cell viability. The results showed that the cell stock solution remained stable for up to 6 h under both low temperature (2-8 ℃) and room temperature (20-26 ℃) conditions, while the intermediate product remained stable for up to 3 h under the same conditions. After formulation reconstitution, using sodium chloride injection diluted with 1% or 2% human serum albumin maintained a viability of over 80% within 4 h. It was observed that different dilution factors had an impact on cell viability. After formulation reconstitution, cultivation in medium with 2% platelet lysate resulted in a cell viability of over 80% after 24 h. In conclusion, the stability of cell stock solution within 6 h and intermediate product within 3 h meets the requirements. The addition of 1% or 2% human serum albumin in the reconstitution diluent can better protect the post-reconstitution cell viability.

Objective To investigate the effect of electromagnetic wave power density on the expression of glial fibrillary acidic protein(GFAP)in the hippocampus of SD rats under 1800 MHz electromagnetic wave irradiation,and whether it exhibits a"window effect".Methods Ninety-eight 4-week-old SPF-grade SD rats were randomly divided into 14 groups,with 7 rats in each group.Seven groups were exposed groups(frequency:1800 MHz,power densities:0.1 mW/cm2,0.3 mW/cm2,0.5 mW/cm2,0.7 mW/cm2,0.9 mW/cm2,1.0 mW/cm2,1.2 mW/cm2)and corresponding 7 groups were control groups(power density:0 mW/cm2).Exposure was conducted for 12 hours daily for 3 weeks.After exposure,Western Blot was used to detect the expression level of GFAP in the hippocampal tissue,and immunohistochemistry staining was performed to determine the average optical density(MOD)value of GFAP-positive expression products in the DG,CA3,and CA1 regions of the hippocampal tissue,to determine the power density window of GFAP expression in the hippocampus of SD rats under 1800 MHz exposure.Results At power densities of 0.1 mW/cm2 and 0.3 mW/cm2,Western Blot results showed increased expression of GFAP in the rat hippocampus(P<0.05),and immunohistochemistry staining demonstrated increased MOD values of GFAP in the three regions(P<0.05).Conclusion Long-term exposure to 1800 MHz elect-romagnetic radiation has a"window effect"on the expression of GFAP in the DG,CA3,and CA1 regions of the hippocampus in SD rats,with power density windows of 0.1 mW/cm2 and 0.3 mW/cm2.

Objective:To study the clinical safety and validity of retrograde new endoscopic field of vision in miniature pigs.Methods:6 live miniature pigs were selected as study subjects,En-doscopic Retrograde New View(ERNV)was selected.The performance,image quality and intraoper-ative and postoperative complications were evaluated.To evaluate whether all the experimental ani-mals could complete the relevant endoscopy.Verify ERNV's operating performance,including whether the duodenoscope can enter the biliary tract smoothly,and made sure whether the injection,suction,and instrument channels were unobstructed.Choledochoscope image clarity,color resolu-tion,image deformation and distortion,accurate evaluation of lumen conditions and clear observation of mucosal surface conditions were analyzed.Whether there were operant injuries such as bleeding and perforation,as well as adverse events such as respiratory depression and cardiac arrest.The sur-vival status and adverse reactions of all pigs were observed.Results:The choledochoscope was successfully inserted into the bile duct of 6 miniature pigs.The product had good operation perfor-mance and could enter the bile duct through the duodenoscope smoothly.The injection,suction and instrument channels were relatively smooth.In addition,the endoscopic images are clear,with better color resolution,and without image deformation and distortion,which can realize accurate evaluation of the conditions in the lumen and observe the mucosal surface conditions more clearly.No bile duct stenosis or dilatation occurred in all miniature pigs,and the bile duct mucosa was smooth,without hyperemia and edema,and no abnormal thickening or bending of mucous vessels.During the exami-nation,there were no operational injuries such as bleeding and perforation,and no adverse events such as respiratory depression and cardiac arrest occurred.The vital signs of all miniature pigs tended to be stable after operation,and the survival state was good,and there were no complications such as cholangitis,bleeding and perforation.Conclusion:ERNV has good clinical safety and efficacy,ex-cellent operation performance and excellent image quality,and is worthy of clinical application.

Humans ; PPAR gamma/metabolism* ; Multiple Sclerosis ; Transcription Factors/metabolism* ; Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha

Neck dissection(ND)is one of the main treatment methods for oral and maxillofacial malignancies.Although ND type is in con-stant improvement,but intraoperative peal-pull-push injury of the accessory nerve,muscle,muscle membrane,fascia and ligament induced shoulder syndrome(SS)is still a common postoperative complication,combined with the influence of radiochemotherapy,not only can cause pain,stiffness,numbness,limited dysfunction of shoulder neck and arm,but also may have serious impact on patient's life quality and phys-ical and mental health.At present,there is still a lack of a systematic evaluation and rehabilitation management program for postoperative SS of oral and maxillofacial malignant tumors.Based on the previous clinical practice and the current available evidence,refer to the relevant lit-erature at home and abroad,the experts in the field of maxillofacial tumor surgery and rehabilitation were invited to discuss,modify and reach a consenusus on the etiology,assessment diagnosis,differential diagnosis,rehabilitation strategy and prevention of SS,in order to provide clinical reference.

Objective To investigated vascular characteristics and clinical follow-up results of gestational trophoblastic neoplasia(GTN)with uterine arteriovenous malformation(UAVM)using contrast-enhanced magnetic resonance angiography(CE-MRA).Methods Patients clinically suspected of GTN at Obstetrics and Gynecology Hospital,Fudan University from Dec 2015 to Dec 2020 were selected.Imaging characteristics of conventional magnetic resonance imaging and CE-MRA before treatment.The International Federation of Gynecology and Obstetrics(FIGO)2000 clinical staging and prognosis scoring system was used to evaluate the severity of the condition and related risk factors,the treatment methods(chemotherapy,surgical treatment,and arterial embolization)and prognosis determined during follow-up were recorded.Results A total of 44 cases were included,including 5 cases of placental site trophoblastic tumor(PSTT)and 39 cases of the other GTN.There were 3 cases of PSTT combined with UAVM and 23 cases of the other GTN combined with UAVM.Thirty-nine cases of the other GTN were divided into two groups according to the presence or absence of UAVM.Data regarding the β-human chorionic gonadotropin(β-hCG)value(＜10 000 mIU/mL and≥10 000 mIU/mL)were evaluated using Chi-square test,and the difference was statistically significant(P=0.001).The average FIGO scores of the two groups were 4.19±3.69 and 6.70±3.39,and the difference was statistically significant(P=0.035).Conclusion When β-hCG value≥10 000 mIU/mL,the probability of UAVM occurrence increases.The higher the prognosis score is,the more possibility of formation of UAVM.The use of CE-MRA technology helps to better diagnose UAVM.

Objective To investigate the efficacy of endoscopic Delta large channel unilateral laminotomy for bilateral decompression(ULBD)in the treatment of lumbar spinal stenosis(LSS),and the postoperative complications was analyzed.Methods A total of 100 patients with LSS in our hospital from January 2021 to February 2023 were selected and divided into the control group and the observation group according to random number table method,with 50 cases in each group.Patient in the control group were treated with bilateral or unilateral decompression through the median incision adjacent to the lateral spinous process,and patients in the observation group were treated with endoscopic Delta large channel ULBD.The visual analogue scale(VAS)scores,Japanese Orthopaedic Association(JOA)scores,Oswestry disability index(ODI)scores before surgery and 1 month,3 months,6 months after surgery,as well as clinical efficacy and incidence of postoperative complications of patients between the two groups were compared.Results Compared with preoperative results,the VAS scores of leg pain and low back pain and ODI scores of patients 1 month,3 months and 6 months after surgery in both groups were significantly lower(P<0.05),and JOA scores were significantly higher(P<0.05).Moreover,compared with the control group,the VAS scores of leg pain and low back pain and ODI scores of patients 1 month,3 months and 6 months after surgery in the observation group were lower(P<0.05),the JOA scores were higher(P<0.05).The total effective rate in the observation group was 98.00%,which was higher than 72.00%in the control group(P<0.05).The incidence of postoperative complications in the observation group was 4.00%,which was lower than 24.00%in the control group(P<0.05).Conclusion Endoscopic Delta large channel ULBD in the treatment of LSS can effectively reduce postopera-tive leg pain and low back pain,improve lumbar function,improve clinical therapeutic effect,and reduce postoperative complications.

Objective Polymorphic microsatellite markers developed for Apodemus peninsulae can enrich its genetic data and lay a foundation for genetic quality control and gene mapping.Methods Microsatellite loci were screened based on the genome sequence of Apodemus peninsulae,and microsatellite primers were identified.The genetic diversity of the population was analyzed by multiplex PCR.Results Thirty microsatellite markers were successfully developed and evaluated using 60 samples of Apodemus peninsulae.A total of 152 alleles were detected,with an average of 5.067 alleles per locus.The average observed heterozygosity was 0.592.The average Shannon index was 1.265.The average polymorphism information content was 0.598.Conclusions Based on the microsatellite loci developed in this study,the genetic diversity of Apodemus peninsulae can be effectively analyzed,laying a foundation for establishing genetic quality standards and detection method.

Porcine deltacoronavirus(PDCoV),a newly discovered virus in recent years,can cause severe diarrhea,vomiting,dehydration and even death in piglets.S protein is an important structur-al protein of PDCoV,which determines the host or tissue tropism of the virus,and is an important target for the development of PDCoV vaccines and detection methods.In order to prepare mono-clonal antibody(MAb)against the S protein of PDCoV,the recombinant plasmid of S protein was constructed based on the extracellular domain sequence of S protein of PDCoV epidemic strain in China and transformed into DH10Bac competent cells.The recombinant bacmid was identified by blue-white spot screening and PCR.BALB/c mice were immunized with S protein,and the spleen cells of immunized mice were fused with myeloma cells.The positive hybridoma cells that secreted stable antibodies were screened by indirect ELISA and subcloning.Five hybridoma cell superna-tants(MAb)specifically recognizing S protein(2E5,4D5,5D10,2F7 and 5A9)were identified by Western blot and immunofluorescence assay(IFA).Subsequently,the neutralization test showed that three of the monoclonal antibodies(2E5,4D5 and 5D10)could neutralize the virus to varying degrees.The S protein was successfully expressed and 5 monoclonal antibodies that can stably se-crete and specifically bind to PDCoV and S protein were prepared,which laid an important founda-tion for further research on the structure and function of S protein,the development of detection methods for PDCoV infection,and the prevention or treatment of PDCoV infection.

Patients with severe trauma require an extremely timely treatment and transfusion plays an irreplaceable role in the emergency treatment of such patients. An increasing number of evidence-based medicinal evidences and clinical practices suggest that patients with severe traumatic bleeding benefit from early transfusion of low-titer group O whole blood or hemostatic resuscitation with red blood cells, plasma and platelet of a balanced ratio. However, the current domestic mode of blood supply cannot fully meet the requirements of timely and effective blood transfusion for emergency treatment of patients with severe trauma in clinical practice. In order to solve the key problems in blood supply and blood transfusion strategies for emergency treatment of severe trauma, Branch of Clinical Transfusion Medicine of Chinese Medical Association, Group for Trauma Emergency Care and Multiple Injuries of Trauma Branch of Chinese Medical Association, Young Scholar Group of Disaster Medicine Branch of Chinese Medical Association organized domestic experts of blood transfusion medicine and trauma treatment to jointly formulate Chinese expert consensus on blood support mode and blood transfusion strategies for emergency treatment of severe trauma patients ( version 2024). Based on the evidence-based medical evidence and Delphi method of expert consultation and voting, 10 recommendations were put forward from two aspects of blood support mode and transfusion strategies, aiming to provide a reference for transfusion resuscitation in the emergency treatment of severe trauma and further improve the success rate of treatment of patients with severe trauma.