Objective To explore the method for establishing a pig left lung orthotopic transplantation model. Methods A total of 4 male Yorkshire pigs weighing (40.0±2.5) kg underwent surgical procedures, including anesthesia, tracheal intubation, donor lung procurement, and recipient lung transplantation. Histological morphology and blood gas analysis of the transplanted lungs were assessed 2 hours after reperfusion to evaluate the histological changes and function of the transplanted lungs. Results The pigs underwent left lung in situ transplantation, effectively simulating conditions relevant to human lung transplantation. Two hours after the transplantation, arterial blood gas analysis showed that arterial partial pressure of oxygen was 155.4-178.6 mm Hg, arterial partial pressure of carbon dioxide was 53.1-62.4 mm Hg, and the oxygenation index was 310.8-357.2 mm Hg. Hematoxylin and eosin staining indicated a low degree of pulmonary edema and minimal cellular infiltration. Conclusion The pig left lung orthotopic transplantation model possesses strong operability and stability. Researchers can replicate this model according to the described methods and further conduct basic research and explore clinical translational applications.

A case of traumatic complete lumbosacral spondylolisthesis combined with unstable pelvic fracture is reported. A 55-year-old male patient was admitted to the hospital 8 h after being hit by a heavy object on the lumbosacral region. Admission diagnosis: (1) traumatic hemorrhagic shock; (2) bilateral pulmonary contusion with pleural effusion, and dislocation of the right 12th costovertebral joint; (3) left renal contusion with subcapsular hematoma; (4) traumatic lumbosacral spondylolisthesis (Meyerding grade V), L 5 lamina fracture, L 2 and L 5 spinous process fractures, left L 3-L 5 transverse process fractures, right L 5 inferior articular process fracture, and L 1-L 3 and L 5 transverse process fractures; (5) lumbosacral Morel-Lavallée lesion; (6) pubic symphysis separation, left sacral wing fracture, and sacroiliac joint dislocation (Young-Burgess APC type III); (7) Multiple incomplete injuries of bilateral lumbosacral nerves, and cauda equina syndrome (Gibbons type Ⅳ). The patient underwent open reduction of pelvic fracture and pubic symphysis separation, closed reduction of sacroiliac joint dislocation and combined internal and external fixation, and open reduction and internal fixation of lumbosacral spondylolisthesis. At the 1-year follow-up after surgery, the pelvis achieved anatomical reduction with good fracture healing, the spinal anatomical alignment returned to normal, and lumbosacral bony fusion was observed, and weakness of both lower limbs and abnormal urodynamics caused by residual lumbosacral nerve injury were observed.

Supercooling preservation technology, as a groundbreaking innovation in the field of organ preservation, significantly reduces the metabolic rate of cells and inhibits ice crystal formation by placing organs in a low-temperature environment near or below the freezing point. This technology extends the preservation time of organs and maintains their biological activity. Compared with the traditional low-temperature preservation at 4 °C, supercooling preservation effectively avoids cell damage and the accumulation of metabolic products, demonstrating significant advantages in the preservation of cells, tissues and organs. In recent years, important progress has been made in the optimization of cryoprotectants, the application of antifreeze proteins, the improvement of vitrification technology, and the development of nanotechnology-based rewarming techniques. These advancements provide new pathways to address the challenges of toxicity, ice crystal formation and uneven rewarming rates during supercooling preservation. This review summarizes the basic principles of supercooling preservation, the application of key technologies, and their practical effects in organ transplantation. It also analyzes the challenges of toxicity and rewarming efficiency, aiming to provide theoretical support and research directions for the future optimization of organ low-temperature preservation technology and its clinical application.

Objective To investigate the status and developmental trends of clinical trials for weight control drugs in China,and to provide data support for sponsors,researchers,and regulatory authorities.Methods The drug clinical trial registration and information platform of the National Medical Products Administration was utilized to search for registered clinical trials of weight control drugs from November 2012 to June 2024.The search employed"overweight","obesity",and"weight loss"as keywords.The information collected included project registration time,drug name,dosage form,drug classification,indications,trial staging,study progress,design type,lead unit,and sponsor.Microsoft Office Excel software was employed for data entry,organization,and extraction.Results A total of 95 registered clinical trials of weight control drugs were identified,comprising 40 domestic multicenter trials,47 domestic single-center trials,and 8 international multicenter trials.Regarding trial phasing,46(48.4％)were phase Ⅰ clinical trials,17(17.9％)were phase Ⅱ clinical trials,19(20.0％)were phase Ⅲ clinical trials,and 13(13.7％)were bioequivalence trials.The drug categorization encompassed 22 chemical drugs,20 biological products,and 1 traditional Chinese medicine/natural drug.Concerning drug dosage forms,there were 32 items of injectable dosage forms,8 items of tablets,2 items of capsules,and 1 item of chewable tablets.Conclusions Registered clinical trials for weight-loss medications in China are predominantly concentrated in regions with developed medical resources.Injectable biologics constitute most test drugs,with most drugs in the early stages of research and development.The examination of the safety and efficacy of these drugs remains to be substantiated,and it is anticipated that a considerable period will elapse before their approval and market introduction.

Objective To explore the effect of chrysin on intestinal flora in mice with alcoholic liver disease(ALD).Methods Mice were randomly assigned to normal control group,ALD model group,Silymarin group,chrysin low-dose group,chrysin high-dose group(25,50 mg·kg-1).The mice were fed with alcoholic liquid diet and a single dose of alcohol(5 g·kg-1)for eight weeks to establish the ALD model.After eight weeks of oral administration,each group's serum and plasma lipids and liver function indices were collected and detected using kits;then collected the liver and observed the pathological changes of the liver using HE staining;meanwhile,intestinal contents were collected and changes in mouse gut flora were analyzed by 16S rDNA sequencing.Results Compared with the ALD group,the level of aspartate transaminase(AST),alanine transaminase(ALT)and triacylglycerol(TG)of low-dose and high-dose chrysin groups were significantly reduced,and it can alleviate liver cell steatosis and inflammatory reactions caused by alcohol.16S rDNA results showed that the total number and types of intestinal flora in the ethanol group were significantly reduced,as well as a change in the dominant genus to Escherichia-Shigella and Akkermansia.Compared to the ALD model group,the Shannon index of the intestinal microbiota increased significantly in mice treated with low and high doses of chrysin.In addition,at the phylum and genus level,the abundance of the high-dose chrysin group increased significantly,resulting in an overall increase in the total number and amount of microbiota.The abundance of dominant bacterial groups,such as Oscillospirales,irmicutes,andAlloprevotella,was also significantly increased.Conclusion Chrysin may exert therapeutic effects on ALD by improving intestinal flora imbalance in ALD mice.

A case of traumatic complete lumbosacral spondylolisthesis combined with unstable pelvic fracture is reported. A 55-year-old male patient was admitted to the hospital 8 h after being hit by a heavy object on the lumbosacral region. Admission diagnosis: (1) traumatic hemorrhagic shock; (2) bilateral pulmonary contusion with pleural effusion, and dislocation of the right 12th costovertebral joint; (3) left renal contusion with subcapsular hematoma; (4) traumatic lumbosacral spondylolisthesis (Meyerding grade V), L 5 lamina fracture, L 2 and L 5 spinous process fractures, left L 3-L 5 transverse process fractures, right L 5 inferior articular process fracture, and L 1-L 3 and L 5 transverse process fractures; (5) lumbosacral Morel-Lavallée lesion; (6) pubic symphysis separation, left sacral wing fracture, and sacroiliac joint dislocation (Young-Burgess APC type III); (7) Multiple incomplete injuries of bilateral lumbosacral nerves, and cauda equina syndrome (Gibbons type Ⅳ). The patient underwent open reduction of pelvic fracture and pubic symphysis separation, closed reduction of sacroiliac joint dislocation and combined internal and external fixation, and open reduction and internal fixation of lumbosacral spondylolisthesis. At the 1-year follow-up after surgery, the pelvis achieved anatomical reduction with good fracture healing, the spinal anatomical alignment returned to normal, and lumbosacral bony fusion was observed, and weakness of both lower limbs and abnormal urodynamics caused by residual lumbosacral nerve injury were observed.

Objective To investigate the status and developmental trends of clinical trials for weight control drugs in China,and to provide data support for sponsors,researchers,and regulatory authorities.Methods The drug clinical trial registration and information platform of the National Medical Products Administration was utilized to search for registered clinical trials of weight control drugs from November 2012 to June 2024.The search employed"overweight","obesity",and"weight loss"as keywords.The information collected included project registration time,drug name,dosage form,drug classification,indications,trial staging,study progress,design type,lead unit,and sponsor.Microsoft Office Excel software was employed for data entry,organization,and extraction.Results A total of 95 registered clinical trials of weight control drugs were identified,comprising 40 domestic multicenter trials,47 domestic single-center trials,and 8 international multicenter trials.Regarding trial phasing,46(48.4％)were phase Ⅰ clinical trials,17(17.9％)were phase Ⅱ clinical trials,19(20.0％)were phase Ⅲ clinical trials,and 13(13.7％)were bioequivalence trials.The drug categorization encompassed 22 chemical drugs,20 biological products,and 1 traditional Chinese medicine/natural drug.Concerning drug dosage forms,there were 32 items of injectable dosage forms,8 items of tablets,2 items of capsules,and 1 item of chewable tablets.Conclusions Registered clinical trials for weight-loss medications in China are predominantly concentrated in regions with developed medical resources.Injectable biologics constitute most test drugs,with most drugs in the early stages of research and development.The examination of the safety and efficacy of these drugs remains to be substantiated,and it is anticipated that a considerable period will elapse before their approval and market introduction.

Objective To explore the effect of chrysin on intestinal flora in mice with alcoholic liver disease(ALD).Methods Mice were randomly assigned to normal control group,ALD model group,Silymarin group,chrysin low-dose group,chrysin high-dose group(25,50 mg·kg-1).The mice were fed with alcoholic liquid diet and a single dose of alcohol(5 g·kg-1)for eight weeks to establish the ALD model.After eight weeks of oral administration,each group's serum and plasma lipids and liver function indices were collected and detected using kits;then collected the liver and observed the pathological changes of the liver using HE staining;meanwhile,intestinal contents were collected and changes in mouse gut flora were analyzed by 16S rDNA sequencing.Results Compared with the ALD group,the level of aspartate transaminase(AST),alanine transaminase(ALT)and triacylglycerol(TG)of low-dose and high-dose chrysin groups were significantly reduced,and it can alleviate liver cell steatosis and inflammatory reactions caused by alcohol.16S rDNA results showed that the total number and types of intestinal flora in the ethanol group were significantly reduced,as well as a change in the dominant genus to Escherichia-Shigella and Akkermansia.Compared to the ALD model group,the Shannon index of the intestinal microbiota increased significantly in mice treated with low and high doses of chrysin.In addition,at the phylum and genus level,the abundance of the high-dose chrysin group increased significantly,resulting in an overall increase in the total number and amount of microbiota.The abundance of dominant bacterial groups,such as Oscillospirales,irmicutes,andAlloprevotella,was also significantly increased.Conclusion Chrysin may exert therapeutic effects on ALD by improving intestinal flora imbalance in ALD mice.

Objective:To compare the efficacy of the horizontal plate plus raft screws above the acetabulum and fixation with screws only for acetabular fractures combined with dome impaction in the aged patients.Methods:A retrospective cohort study was conducted to analyze the clinical data of 20 aged patients with acetabular fractures combined with dome impaction, who were admitted to Tianjin hospital between May 2013 and January 2023, including 5 males and 15 females, aged 61-84 years [(72.2±7.3)years]. According to Letournel and Judet classification, 13 patients had anterior column fracture, 5 anterior column fracture combined with posterior transverse fracture and 2 two-column fracture. All the patients underwent open reduction and internal fixation through an anterior approach. Of them, 11 patients were treated with the fixation with the horizonal plate plus raft screws above the acetabulum (plate plus raft screw group) and 9 with the screws only (screw only group). The operative time, intraoperative blood loss, and intraoperative fluoroscopy times were compared between the two groups. The quality of fracture reduction was evaluated with the Matta′s radiographic criteria at 3 days after surgery and the function of the hip joint was assessed with Merle D′Aubigné and Postel scoring system at 3 months after surgery and at the last follow-up as well as the excellent and good rate at te last follow-up. The occurrence of postoperative complications was observed.Results:All the patients were followed up for 6-18 months [(13.1±3.1)months]. There were no significant differences in the operative time, intraoperative blood loss or intraoperative fluoroscopy times between the two groups ( P>0.05). According to the Matta′s radiographic criteria at 3 days after surgery, patients with anatomical reduction and satisfactory reduction accounted 6 and 5 in the plate plus raft screw group, compared to 5 and 4 respectively in the screw only group ( P>0.05). The values of Merle D′Aubigné and Postel score at 3 months after surgery and at the last follow-up were (14.0±2.4)points and (15.8±2.2)points in the plate plus raft screw group, which were higher than those in the screw only group [(11.0±2.6)points and (13.0±3.1)points] ( P<0.01). The values of Merle D′Aubigné and Postel score at the last follow-up of both groups were further enhanced from those at 3 months after surgery ( P<0.01). At the last follow-up, 3 patients were rated excellent, 6 good, 1 fair and 1 poor in the plate plus raft screw group, with an excellent and good rate of 81.8%, while in the screw only group, 3 were rated good, 2 fair and 4 poor, with an excellent and good rate of 33.3% ( P<0.05). One patient in the plate plus raft screw group and 5 in the screw only group had displacement of the dome impaction fragment combined with traumatic arthritis after surgery ( P<0.05). Conclusion:For acetabular fractures combined with dome impaction in the aged patients, the horizontal plate plus raft screw above the acetabulum can effectively improve the function restoration of the hip joint and reduce the occurrence of the displacement of the dome impaction fragment and traumatic arthritis after surgery compared to the fixation with screws only.

Objective To standardize the management of clinical trials in our hospital,reduce the incidence of protocol deviations,and provide a reference for improving the quality of clinical trials.Methods The healthcare failure mode and effect analysis(HFMEA)method was used to determine the potential failure modes of the current protocol deviation.The frequency,severity and detectability of failure modes were quantified and evaluated.The risk priority number(RPN)was calculated and the corresponding improvement measures were proposed.The RPN values before and after the implementation of HFMEA were statistically analyzed to evaluate the improvement effect.Results After the implementation of HFMEA activities,the RPN values of 14 potential failure modes decreased significantly(P<0.05);The risk level of 12 potential failure modes decreased.The HFMEA team members'ability in finding and solving problems,communication and cooperation were significantly improved.Conclusions The implementation of HFMEA activities contributes to the management of protocol deviation in clinical trials,can effectively reduce the occurrence of protocol deviation,and provides experience for improving the quality of drug clinical trials.