Objective To investigate the effects of 16-week Tai Chi exercise on muscle strength,plantar tactile sensation,kinesthesia,and postural control of older adults at different ages.Methods Thirty-nine older adults were divided into 60-75-year-old group(n=24)and the 76-90-year-old group(n=15),and both groups received Tai Chi practice for 16 weeks.The muscle strength,plantar tactile sensation,kinesthesia,and center of pressure root mean square(CoP-RMS)were measured before and after practice.Results After 16 weeks of Tai Chi exercise,the fifth metatarsal head tactile sensation and ankle dorsiflexion/plantarflexion kinesthesia thresholds decreased in the 76-90-year-old group.However,there was no significant change in the 60-75-year-old group.The CoP-RMS in the medial/lateral direction decreased in the 60-75-year-old and 76-90-year-old group.Conclusions After 16 weeks of Tai Chi exercise,muscle strength,plantar tactile sensation,kinesthesia,and postural control were improved.Especially for older adults aged over 75 years,Tai Chi exercise improved their plantar tactile sensation,kinesthesia,and postural control to a greater extent.Tai Chi practice provides a suitable and effective exercise form for older adults over 75 years.

Objective To investigate the effects of 16-week Tai Chi exercise on muscle strength,plantar tactile sensation,kinesthesia,and postural control of older adults at different ages.Methods Thirty-nine older adults were divided into 60-75-year-old group(n=24)and the 76-90-year-old group(n=15),and both groups received Tai Chi practice for 16 weeks.The muscle strength,plantar tactile sensation,kinesthesia,and center of pressure root mean square(CoP-RMS)were measured before and after practice.Results After 16 weeks of Tai Chi exercise,the fifth metatarsal head tactile sensation and ankle dorsiflexion/plantarflexion kinesthesia thresholds decreased in the 76-90-year-old group.However,there was no significant change in the 60-75-year-old group.The CoP-RMS in the medial/lateral direction decreased in the 60-75-year-old and 76-90-year-old group.Conclusions After 16 weeks of Tai Chi exercise,muscle strength,plantar tactile sensation,kinesthesia,and postural control were improved.Especially for older adults aged over 75 years,Tai Chi exercise improved their plantar tactile sensation,kinesthesia,and postural control to a greater extent.Tai Chi practice provides a suitable and effective exercise form for older adults over 75 years.

Objective To investigate the correlations of computed tomography (CT), clinical, and pathological features in patients with invasive lung adenocarcinoma positive and negative for spread through air spaces (STAS). Methods A total of 236 patients with invasive lung adenocarcinoma confirmed by surgery and pathology were selected, including 118 patients in STAS-positive group and 118 patients in STAS-negative group. The clinical data, CT signs, and pathological features of the two groups were collected and analyzed. Results There was a correlation between age and the occurrence of STAS. The age of the positive group was higher than that of the negative group. Smoking history and family history of tumor had no correlation with the occurrence of STAS. CT features signs such as nodule type and shape, tumor-lung interface, lobulation sign, spiculation sign, vacuole/cavity, air-bronchogram, pleural indentation sign, vascular changes, mean diameter of tumor, mean diameter of solid component, and the percentage of tumor solid components were significantly different between patients with and without STAS. The incidence of STAS in patients with solid nodules and partial solid nodules was significantly higher than that in patients with ground glass nodules. Multivariate analysis showed that the percentage of tumor solid components, air-bronchogram sign, lobulation sign, and tumor-lung interface were independent risk factors for predicting the occurrence of STAS. Conclusion The clinical data and CT signs of patients with invasive lung adenocarcinoma are related to the occurrence of STAS. CT signs such as the percentage of tumor solid components, air-bronchogram, lobulation sign, and tumor-lung interface are of great significance to STAS prediction. Our findings provide an important basis for selection of personalized clinical treatment plans.

Objective:To investigate the effect of flap combined with 3D printed microporous titanium(tantalum)prosthesis in the treatment of lower extremity soft tissue defect with large bone defect.Methods:From January 2019 to December 2020, 2 patients with large soft tissue defects on dorsal foot together with large metatarsal bone defect and 4 patients with soft tissue defects of calf with large tibial bone defect were treated. The areas of soft tissue defect were 5.0 cm×8.0 cm-15.0 cm×10.0 cm. The length of the bone defect were 3.8 cm to 7.0 cm, 5.75 cm in average. In the first stage, metatarsal bone defect or tibial bone defect was filled with vancomycin blended bone cement, meanwhile, soft tissue defect was repaired with anterolateral femoral flap(ALTF) with vascular anastomosis in 2 cases of feet, and local fascia flap was trans-positioned in 4 cases of lower extremity defects. The sizes of repairing flap were 6.0 cm×8.5 cm-16.0 cm×11.0 cm. Two to 7 months after the initial surgery, the customer designed microporous titanium prostheses were used(5 cases with microporous titanium and 1 with microporous tantalum) to repair the bone defects. The wound healing, the integration of metatarsal and tibial fractures with 3D printed microporous titanium(tantalum) prostheses, and the walking condition were observed after surgery. The follow-up lasted from 6 to 25 months, with an average of 12.7 months.Results:The wound healing in 5 patients was good. The patients stood on the foot in 2 months after surgery, started to walk with the assistance of crutch in 3 months after surgery, and took walk without assistance in 5-6 months after surgery. Good osseous integration were achieved. One diabetic patient had infection of foot wound 3 months after surgery. After removal of microporous titanium prosthesis and replacement of vancomycin blended interstitial substance of bone cement, the wound healed and the patient resumed walking.Conclusion:It is an effective method to encourage the patients to take early ambulation after the surgery for lower extremity soft tissue defect with large bone defect that was repaired by a flap and 3D printed microporous titanium(tantalum)prosthesis. Further observations are required to investigate the long-term efficacy, and the reduction of prosthesis infection rate requires further exploration.

Objective: To investigate the effect of diabetes on the intensity of sarcoplasmic reticulum Ca2+-ATPase (SERCA2a)-SUMOylation and SERCA2a activity of myocardium in experimental rats.
Methods: The 8 weeks old SD rats were divided into 2 groups, Diabetic group, with diet-induced type 2 diabetic rats and Control group, with normal rats. The systolic and diastolic cardiac functions were evaluated by echocardiography and left ventricular pressure measurement. The intensity of SERCA2a-SUMOylation was examined by co-immunoprecipitation and SUMOylation kit.
Results: Compared with Control group, Diabetic group had decreased systolic and diastolic cardiac functions, especially for diastolic function;decreased SERCA2a protein expression and intensity of SUMOylation;decreased SUMOylation E2 (Ubc9 ) protein expression. The protein levels of SUMO1, SAE1 and SAE2 were similar between 2 groups.
Conclusion: The intensity of SERCA2a-SUMOylation and Ubc9 decreased in diabetic myocardium which implies that SERCA2a-SUMOylation and Ubc9 were closely related to the damage of diabetic myocardium in experimental rats.

Perilla frutescens callus were induced from leave explants on MS medium suplemented with NAA and 2,4-D. The Rosmarinic acid (RosA) content of dried callus was 0.85%. The RosA was extracted from the callus with 80% alcohol and purified through extraction with ethyl acetate and a Sephadex LH-20 column chromatography. The parity of the final product was 95% as analyzed by HPLC RosA could inhibit the growths of Escherichia colt, Staphylococcus aueris and Rhizotonia with MICs of 300, 400, 800?g/mL, respectively.