OBJECTIVE: To introduce the etiology and prevention of bone cement implantation syndrome (BCIS). METHODS: The literature about BCIS at home and abroad in recent years was extensively reviewed, and the incidence, clinical manifestations, etiology, and prevention of BCIS were summarized and analyzed. RESULTS: The clinical manifestations of BCIS are diverse. The etiology of BCIS is not completely clarified, and it may be related to circulating methyl methacrylate-mediated model, embolus-mediated model, histamine release and hypersensitivity response, complement activation and multimodal model. BCIS prevention begins with the identification of high-risk patients in preoperative evaluation and communication between surgeon and anesthesiologist about the choice of implant type, surgical procedure, and technique to minimize the risk of cardiovascular complications in high-risk patients with multiple or severe risk factors or comorbidities. Preoperative assessment and optimization of a patient's cardiovascular reserve is also critical to prevent BCIS. CONCLUSION BCIS is a possible complication after hip joint arthroplasty, and its pathogenesis needs to be further research in order to provide new ideas for prevention and treatment.
Humans ; Bone Cements/adverse effects* ; Postoperative Complications/etiology* ; Arthroplasty, Replacement, Hip/adverse effects* ; Risk Factors ; Syndrome ; Methylmethacrylate/adverse effects*

OBJECTIVE: To summarize research progress on application of Cup-cage reconstruction in revision of chronic pelvic discontinuity (CPD) in patients undergoing total hip arthroplasty (THA). METHODS: Relevant literature at home and abroad in recent years was reviewed to summarize the principles of the Cup-cage reconstruction, preoperative patient assessment, intraoperative skills, clinical and radiological effectiveness, limitations, and postoperative complications. RESULTS: For the treatment of CPD, the Cup-cage reconstruction achieved long-term acetabular cup bone ingrowth, CPD healing, and biologic fixation of the prosthesis by restoring pelvic continuity. Preoperative evaluation of the surgical site and general condition is necessary. The main intraoperative objectives are to reconstruct pelvic continuity, restore the center of rotation of the hip, and avoid neurovascular injury. Current studies have demonstrated significant clinical and radiological effectiveness as well as acceptable prosthesis survival rates after operation. Nevertheless, there is a lack of evidence regarding the staging of CPD, the optimal surgical approach and internal fixation, and the factors influencing postoperative prosthesis survival remain undefined. CONCLUSION Cup-cage reconstruction can be an effective treatment for CPD after THA, but there is still a need to explore CPD staging, Cup-cage approach and internal fixation, and influencing factors on prosthesis survival.
Humans ; Arthroplasty, Replacement, Hip/methods* ; Hip Prosthesis ; Acetabulum/surgery* ; Reoperation ; Plastic Surgery Procedures/methods* ; Prosthesis Failure ; Postoperative Complications/etiology* ; Hip Joint/surgery*

OBJECTIVE: To review the role of dendritic cells (DC) in immune metabolism of rheumatoid arthritis (RA). METHODS: Literature on the role of DC in the immune metabolism of RA was extensively reviewed in recent years, and the metabolic characteristics of RA, the role of DC in RA, the correlation between the immune metabolism of DC and pathogenesis of RA, and the treatment were summarized and analyzed. RESULTS: DC promotes the progression of RA under hypoxia, increased glycolysis, inhibition of oxidative phosphorylation, and decreased lipid metabolism. Moreover, many DCs (especially conventional DC and monocyte-derived DC) have different functions and phenotypic characteristics in RA, which are closely related to the occurrence and development of RA. CONCLUSION DC plays an important role in the immune metabolism of RA, and immunometabolism therapy based on DC can provide targeted therapy for the treatment of RA.
Dendritic Cells/immunology* ; Arthritis, Rheumatoid/immunology* ; Humans ; Glycolysis ; Oxidative Phosphorylation ; Lipid Metabolism ; Animals

Metabolic reprogramming is a common phenomenon in cancer, with aerobic glycolysis being one of its important characteristics. Hypoxia-inducible factor-1α (HIF1Α) is thought to play an important role in aerobic glycolysis. Meanwhile, naringin is a natural flavanone glycoside derived from grapefruits and many other citrus fruits. In this work, we identified glycolytic genes related to HIF1Α by analyzing the colon cancer database. The analysis of extracellular acidification rate and cell function verified the regulatory effects of HIF1Α overexpression on glycolysis, and the proliferation and migration of colon cancer cells. Moreover, naringin was used as an inhibitor of colon cancer cells to illustrate its effect on HIF1Α function. The results showed that the HIF1Α and enolase 2 (ENO2) levels in colon cancer tissues were highly correlated, and their high expression indicated a poor prognosis for colon cancer patients. Mechanistically, HIF1Α directly binds to the DNA promoter region and upregulates the transcription of ENO2; ectopic expression of ENO2 increased aerobic glycolysis in colon cancer cells. Most importantly, we found that the appropriate concentration of naringin inhibited the transcriptional activity of HIF1Α, which in turn decreased aerobic glycolysis in colon cancer cells. Generally, naringin reduces glycolysis in colon cancer cells by reducing the transcriptional activity of HIF1Α and the proliferation and invasion of colon cancer cells. This study helps to elucidate the relationship between colon cancer progression and glucose metabolism, and demonstrates the efficacy of naringin in the treatment of colon cancer.
Glycolysis ; Colonic Neoplasms/metabolism* ; Humans ; Hypoxia-Inducible Factor 1, alpha Subunit/metabolism* ; Phosphopyruvate Hydratase/metabolism* ; Flavanones/pharmacology* ; Cell Line, Tumor ; Databases, Genetic ; Cell Proliferation/drug effects* ; Transfection ; Warburg Effect, Oncologic

Objective:To develop a deep learning model which can automatically and accurately detect osteoporotic vertebral compression fractures (OVCF) based on artificial intelligence.Methods:MRI images of 500 patients diagnosed with OVCF at The First People＇s Hospital of Guangzhou from January 2019 to October 2021 were collected retrospectively. There were 396 males and 204 females, with an age of (74.5±6.0) years. The T value of bone mineral density was -2.9±0.8. The fracture segments were L1 in 128 cases, L2 in 113 cases, L3 in 109 cases, L4 in 115 cases, and L5 in 108 cases. The multimodal layered converged network was used to train, test, and verify the robustness and generalization ability of a deep learning model based on MRI images of OVCF. The grad-cam was applied to visualize the results. The diagnostic value of the model for OVCF was assessed by comparing the diagnoses between the artificial intelligence model and 2 senior spinal surgeons on the MRI images of 30 OVCF patients randomized from the 500 ones.Results:Of the precise auxiliary diagnosis model for OVCF based on MRI images, the diagnostic accuracy was 96.7%, the sensitivity 93.5%, the specificity 88.9%, the positive predictive value 100.0%, and the negative predictive value 86.6%, all significantly higher than those of the 2 senior spinal surgeons (70.0%, 72.7%, 28.6%, 82.1%, and 28.6%) ( P<0.05). Conclusion:The present study has successfully established a deep learning model which can automatically and accurately diagnose OVCF based on MRI images, showing a high diagnostic efficiency than human spinal surgeons.

BACKGROUND: Anterior cruciate ligament has the function of stabilizing the knee joint and restricting the tibiofemoral joint in the translation and rotation of the tibia. Most patients with anterior cruciate ligament reconstruction have an increased risk of knee pain and knee instability. Knee osteoarthritis after trauma is a serious complication of anterior cruciate ligament injury. Knee osteoarthritis is a chronic progressive disease, and the mechanism of osteoarthritis after anterior cruciate ligament injury remains unclear. OBJECTIVE: To review the relationship between anterior cruciate ligament injury and the risk factors of post-traumatic knee osteoarthritis, so as to provide guidance for the treatment of post-traumatic knee osteoarthritis. METHODS: The first author searched related articles in PubMed database from the establishment of the database to October 2019. The key words were “ACL injury, traumatic knee osteoarthritis, ACL reconstruction, meniscus status, body mass index, cartilage injury, age, graft selection, time interval between injury and surgery”. A total of 123 articles were retrieved, and 66 articles were eligible for the inclusion criteria. RESULTS AND CONCLUSION: (1) Meniscus status, body mass index, cartilage damage, age, graft selection, and time between injury and surgery may influence the development of post-traumatic knee osteoarthritis. (2) Although anterior cruciate ligament reconstruction is primarily performed to restore stability after anterior cruciate ligament rupture, a long-term goal of the process is to reduce the risk of knee osteoarthritis and maintain long-term joint health. (3) Meniscus resection in patients with anterior cruciate ligament rupture accompanied by meniscus injury is also the cause of knee osteoarthritis, which is likely to be caused by weakened endurance and kinematic changes of the joint.