The rapidly evolving aging society in China is associated with increased incidences of osteoporosis and fractures, which have become common health problems that threaten the quality of life of the elderly. Gut microbiota colonizing in the human intestinal tract form a mutual symbiotic relationship with the host and play an important role in the metabolism and immune regulation of the host. In recent years increasing studies have demonstrated that gut microbiota not only affect the digestive system but also contribute to the disease conditions involving the immune system, and have a close relationship with the occurrence and progression of osteoporosis. This review summarizes the progress and hotspots in recent researches of the associations among gut microbiota, the immune system, osteoporosis.
Aged ; Aging ; China ; Gastrointestinal Microbiome ; Gastrointestinal Tract ; microbiology ; Humans ; Microbiota ; Osteoporosis ; microbiology ; Quality of Life

Aim To investigate the protective effect of Qi ZhiXiaoke granules ( QZXK ) on nerve injury using zebrafish and nerve cell injury models. Methods The nerve injury model was established using wild zebrafish AB line, 72 hours after fertilization treated with 1-methyl-4-phenyl-1 , 2 , 3 , 6-four pyridine ( MPTP ) .Then QZXK of different doses were administered for three days,and the trajectory of the zebrafish behavior was recorded and analyzed. Neuroblastoma PC12 cells were incubated with different concentrations of QZXK and MPTP,and the cell viability of PC12 cells was de-tected by MTT. The mitochondrial membrane potential and expression of apoptosis related protein Caspase3 were measured by kits. Results Compared with con-trol group,MPTP reduced the movement distance of ze-brafish,and with the increase of concentration, QZXK promoted the movement distance and reversed the swimming behavior abnormality of zebrafish. Compared with control group, QZXK could inhibit the apoptosis induced by MPTP and promote the cell viability of PC12 cells with MPTP. QZXK improved the membranepotential and decreased the expression of Caspase3 . Conclusions QZXK exerts neuroprotective effect in the process of nerve injury induced by MPTP. The mechanism may be related with inhibiting apoptosis of neural cells. These experiment provides experimental and theoretical foundation for QZXK promoting cogni-tive function.

Objective:To evaluate and summarize the teaching effect of" New Technology of Radiotherapy and Oncology" in the form of questionnaire, understand the degree of demand for the course of all kinds of medical students and improve the teaching contents and methods.Methods:The course of" New Technology of Radiotherapy and Oncology" was a specialized elective course in Peking Union Medical College. After two rounds of teaching practices, we evaluated the students participating in the course or non-course participants by anonymous questionnaire. The questionnaire items include the course content, setting, teachers and improvement suggestions.Results:A total of 73 questionnaires were sent out, and the recovery rate was 100%. Among them, 52(71%) were from students who chose the courses. 83% of the students" strongly agree" that the teaching content of this course is the latest development, the latest achievement or the problem to be solved, 94% were" satisfied" or" very satisfied" with their learning effect, and 92% and 83% were satisfied with the teachers and teaching plan, respectively. After taking the course, students rated" broadening of mind" (96%) as the biggest gain, followed by" facilitating interdisciplinary collaboration" (79%). 86% of the non-course participants felt the need to supplement the existing curriculum with new techniques in oncology radiotherapy, hoping that the curriculum would" broaden the mind" (76%), improve clinical application (81%) and facilitate interdisciplinary collaboration (71%).Conclusion:The questionnaire results show that the teaching practice of this course covers the different needs of all kinds of students, which is worthy of implementation and further improvement.

BACKGROUND: Surgical site infection is the main complication after posterior lumbar surgery, which not only increases the patient's hospitalization time, financial burden and physical pain, but also increases the difficulty for the clinical medical staff, delays the recovery of postoperative patients, even leads to deaths. Therefore, it is important to analyze the factors related to the infection of the surgical site after posterior lumbar surgery. OBJECTIVE: To analyze the risk factors of the surgical site infection after lumbar posterior approach in China. METHODS: Studies about the surgical site infection after lumbar posterior approach were retrieved by computer. The quality of the studies was evaluated by reading the full text. Heterogeneity was analyzed using RevMan 5.3 software. Meta analysis was used to analyze the combined effect. RESULTS AND CONCLUSION: (1) Totally 20 studies with 423 cases of surgical site infection and 13 995 cases of non-infection were included. (2)Meta-analysis univariate analysis results:body mass index ≥ 27 kg/m2[OR=3.82,95%CI(2.47,5.91),P<0.000 01],age ≥ 60 years [OR=1.99,95%CI(1.44,2.76),P<0.000 1],intraoperative blood loss ≥ 300 mL[OR=3.98,95%CI(2.50,6.33),P<0.000 01],subcutaneous fat thickness[MD=5.35,95%CI(3.58,7.12),P<0.000 01],number of segments ≥ 3[OR=3.83,95%CI(2.02,7.26),P<0.000 1],operation time ≥180 minutes[OR=2.96,95%CI(2.06,4.27),P<0.000 01],preoperative serum protein<35 g/L[OR=2.37,95%CI(1.63,3.46),P<0.000 01],and diabetes[OR=2.88,95%CI(2.22,3.74),P<0.000 01]were risk factors for surgical site infection after lumbar posterior approach.(3)Multivariate analysis results:body mass index ≥ 27 kg/m2[OR=3.21,95%CI(1.97,5.22),P<0.000 01],subcutaneous fat thickness[MD=5.35,95%CI(3.58, 7.12),P<0.000 01],preoperative serum protein<35 g/L[OR=3.73,95%CI(2.30,6.04),P<0.000 01],and diabetes[OR=3.35,95%CI(1.75,6.42), P=0.003]were independent risk factors for surgical site infection after lumbar posterior surgery.(4)Results showed that body mass index ≥27 kg/m2, subcutaneous fat thickness, preoperative serum protein < 35 g/L, and diabetes are independent risk factors for surgical site infection after lumbar posterior approach in China. Due to the number of cases of surgical site infection and its methodological quality during the study, the above conclusions still need to be confirmed by more large-scale, high-quality studies to provide reliable evidence for perioperative management.

Abstract: Objective　To analyze the epidemiological characteristics (season, age, gender, mixed infection and clinical manifestations, etc.) of Mycoplasma pneumoniae (MP) infection in children in Hainan Province, so as to provide epidemiological evidence-based medical basis for the prevention and control of MP infection in children in Hainan Province. Methods　The serum IgM antibodies of MP, Legionella pneumophila, Chlamydia pneumoniae, adenovirus, respiratory syncytial virus (RSV), Q fever Rickettsia, parainfluenza virus, influenza A virus and influenza B virus in children with respiratory tract infections (RTIs) who were hospitalized in pediatrics of many hospitals in Hainan Province from March 2012 to February 2020 were detected by indirect immunofluorescence method. The positive serum MP-IgM antibody was defined as MP infection. The epidemiological and clinical data of MP infected cases were analyzed retrospectively. Results　From March, 2012 to February, 2020, a total of 35 731 qualified pediatric inpatients with RTIs in many hospitals in Hainan Province were tested for serum MP-IgM with the total positive rate of 39.12% (13 978/35 731). The yearly positive rates of MP-IgM from 2012 to 2020 were 48.39%, 56.23%, 56.62%, 47.04%, 29.71%, 24.14%, 47.55%, 36.84% and 24.46% respectively. The positive rates of MP-IgM in 2013 and 2014 were significantly higher than those in other years (P<0.05). The positive rate of MP-IgM in summer in Hainan Province was the highest (41.34%) and the lowest in winter (35.77%) (P<0.05). MP infection occurred in all age groups, the positive rate of MP-IgM in children of preschool (51.80%) was significantly higher than that in other age groups (P<0.01), and the positive rate of MP IgM in children of infancy (15.36%) was lower than that in other age groups (P<0.01). The positive rate of MP-IgM in female was 44.77%, which was significantly higher than that in male (35.83%) (P<0.05). MP infection combined with positive IgM of another pathogen accounted for 32.63% (4 561 cases), positive IgM of another two pathogens accounted for 1.26% (176 cases). MP infection was mostly found in pneumonia (68.73%), and the main clinical symptoms were cough (84.72%), fever (51.01%) and wheezing (3.16%). Conclusions　MP is an important pathogen of respiratory tract infection in children in Hainan Province, and infection is more common in children in early school age and early childhood. Mp-specific tests should be performed to identify the pathogen in children suspected of MP infection. In the high incidence season, health education should be strengthened in kindergartens, schools and other places to prevent respiratory tract infection.

Adult ; Aged ; Angioplasty, Balloon, Coronary ; Coronary Angiography ; Coronary Disease ; therapy ; Coronary Restenosis ; prevention & control ; Drug Delivery Systems ; Female ; Follow-Up Studies ; Humans ; Male ; Metals ; Middle Aged ; Retrospective Studies ; Stents

OBJECTIVETo compare the clinical and angiographic outcome in patients with type-II diabetes mellitus undergoing drug-eluting stent (DES) or bare-metal stent (BMS).

METHODSA total of 139 consecutive diabetic patients (114 males) with coronary disease who underwent successful elective percutaneous coronary intervention with DES (n = 83 with 151 lesions) or BMS (n = 56 with 70 lesions) on native coronary arteries from April 2004 to August 2005 at our institution were included in this study. All patients were treated according to guidelines and coronary angiography was repeated at 6 months post procedure in all patients. Aspirin (300 mg/d) and clopidogrel (75 mg/d) were administered till 6 months after the procedure.

RESULTSThere were 42.5% C type by ACC/AHA and 19.0% total occlusion lesions. The average stent length of each lesion was 26.53 +/- 14.72 mm, and mean reference diameter was 2.80 +/- 0.43 mm. Baseline characteristics were similar between DES and BMS groups except lower mean reference vessel diameter in DES than that of BMS group (2.71 +/- 0.41 mm vs. 2.98 +/- 0.53 mm, P < 0.001). The in stent restenosis rate at 6 months (10.6% vs. 38.6%, P < 0.001) and in-segment late loss (0.24 +/- 0.56 mm vs. 0.91 +/- 0.77 mm, P < 0.001) were significantly lower in DES group than those of BMS group. The target lesion revascularization (TLR) incidence was also significantly lower in DES group compared to BMS group (8.6% vs. 30.0%, P < 0.001). However, 4 late in-stent thrombosis were seen in DES group and none in BMS group of DES (P = 0.148).

CONCLUSIONDES implantation in patients with diabetes mellitus is associated with lower in-stent restenosis and TLR rates compared to BMS implantation 6 months after procedure and attention should be paid on late in-stent thrombosis after DES implantation.

Aged ; Angioplasty, Balloon, Coronary ; Coronary Artery Disease ; complications ; therapy ; Diabetes Mellitus, Type 2 ; complications ; therapy ; Drug-Eluting Stents ; Female ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Treatment Outcome

OBJECTIVECompare drug-eluting stent (DES) to bare-metal stent (BMS) in prognosis on treating diffuse coronary lesions and analysis risk factor of treating complex and diffuse lesions in PCI.

METHODS205 consecutive patients with complex and diffuse coronary lesions enrolled our hospital, who were treated with more than 25 mm long DES or BMS. We exclude unsuccessful operation and location. All patients received medical treatment by guideline, and aspirin 300 mg and clopidogrel 75 mg once daily were continued at 6 months after the procedure. The patients were followed up after 6 months.

RESULTSThe study population were consisted of 205 patients that there were 181 man, and 24 women, who got 382 stents for 227 target lesions in coronary. There were 93.8% C and 6.2% B2 ACC/AHA type lesion. There were 86.8% patients with binary or above vessel treated. The average reference vessel diameter was 2.88 +/- 0.43 mm. The average stent length of per lesion was 40.09 +/- 12.94 mm. There were 54.2% lesions treated with overlapping stent. There were not different between DES and BMS in patients baseline characteristics, but RVD of group DES less than of group BMS (2.80 +/- 0.37 mm, 3.10 +/- 0.48 mm, P = 0.005) in lesion baseline characteristics. After 6 months, restenosis rate in group DES was less than in group BMS (15.4%, 48.4%, P < 0.001). There were obvious superiority TVR of DES than of BMS (11.6%, 38.5%, P < 0.001). The rate of local restenosis in group of DES was higher than that in group of BMS (33.3%, 18.2%, P = 0.029). We analyzed the risk factors for diffuse lesion by a logistic regression model, the significant univariate clinical and angiographic predictors of restenosis were treating with overlapping stent (OR = 2.82, P = 0.017) and drug-eluting stent (OR = 5.71, P < 0.001).

CONCLUSIONSWe find that implantation of DES in patients with diffuse lesions in coronary is relatively more safe and associated with more good clinical outcomes, than of BMS.

Aged ; Angioplasty, Balloon, Coronary ; Coronary Angiography ; Coronary Artery Disease ; diagnostic imaging ; therapy ; Coronary Restenosis ; diagnostic imaging ; therapy ; Drug-Eluting Stents ; Female ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Prognosis ; Stents ; Treatment Outcome

OBJECTIVETo compare the clinical and angiographic outcome in patients with total occlusion lesion treated with drug-eluting stent (DES) or bare-metal stent (BMS).

METHODSA total of 155 (138 males) consecutive patients with total occlusion lesion underwent successful revascularization with DES (n = 74) or BMS (n = 81) in our hospital were included in this study. All patients received aspirin 300 mg and clopidogrel 75 mg once daily for at least 3 months after the procedure. Clinical and angiographic follow-up were completed in all patients at 6 months post stenting.

RESULTSDemographic data between the two groups were similar except there was more diabetic patients in DES group (33.8% vs. 18.5%, P < 0.05). A total of 232 stents for 159 target lesions (77 treated with DES, 82 treated with BMS) were implanted. There were 85.4% C ACC/AHA type lesions and 17.0% lesions were treated with overlapping stents. Six months post stenting, the incidence of restenosis (15.6% vs. 41.5%, P < 0.001), the cumulative rate of major adverse cardiac events (MACE) (1.4% vs. 11.1%, P = 0.032) and TLR (5.8% vs. 19.9%, P = 0.001) were significantly lower in DES group than that of BMS group. The incidence of local restenosis in DES group is higher in DES group than that in BMS group (58.3%, 17.6%, P < 0.001). Two DES treated patients developed late in-stent thrombosis.

CONCLUSIONFor patients with total occlusion lesion, the clinical and angiographic outcome 6 months post DES stenting is clearly superior to that of BMS stenting.

Aged ; Coronary Angiography ; Coronary Disease ; complications ; diagnostic imaging ; therapy ; Diabetes Mellitus, Type 2 ; complications ; diagnostic imaging ; Female ; Follow-Up Studies ; Humans ; Hypertension ; complications ; Male ; Middle Aged ; Prognosis ; Stents

Based on the PI3K/Akt signaling pathway, this study aimed to observe the proliferation and apoptosis of ovarian cancer SKOV3 cells at different concentrations of icaritin, in order to explore the possible molecular mechanisms. The research object was ovarian cancer SKOV3 cells. The cells were divided into the control group and icaritin groups(5, 10, 20 μmol·L~(-1)), and administrated with drugs for 48 hours. The cell counting kit-8(CCK-8)assay was used to detect the inhibitory effect of icaritin on the proliferation of ovarian cancer SKOV3 cells. The proliferation ability of the SKOV3 cells was detected by EdU assay. Hoechst 33342 fluorescence staining was used to observe the apoptotic morphology of SKOV3 cells in each group. The distribution of cell cycle and the apoptosis rate of each group were detected by flow cytometry. Quantitative Real-time PCR was used to detect mRNA expressions of PTEN, PI3K, Akt in each group of cells. Protein expressions of PTEN, PI3K, Akt and p-Akt were measured by Western blot. The results showed that the cell inhibition rates of icaritin groups were significantly increased compared with the control group(P<0.05). The rates of EdU-positive cells of icaritin groups were significantly decreased(P<0.05). SKOV3 cells in icaritin groups showed morphological changes of apoptosis. Apoptosis rates of icaritin groups were significantly increased(P<0.05). The proportions of cells in G_0/G_1 phase of icaritin groups were decreased(P<0.05), while the proportions of S phase cells were increased(P<0.05). The gene and protein expressions of PTEN in icaritin groups were elevated(P<0.05). The gene expressions of PI3K and Akt in icaritin groups were down-regulated(P<0.05). The protein expression of PI3K and p-Akt in icaritin groups were reduced(P<0.05). These results indicated that icarin may inhibit the proliferation of ovarian cancer SKOV3 cells in vitro, induce cell apoptosis and affect the cycle distribution of cells by inhibiting the PI3K/Akt signaling pathway.
Apoptosis ; Cell Line, Tumor ; Cell Proliferation ; Female ; Flavonoids ; Humans ; Ovarian Neoplasms/genetics* ; Phosphatidylinositol 3-Kinases/genetics* ; Proto-Oncogene Proteins c-akt/genetics*