Objective:To systematically evaluate the effect of exercise on blood pressure of middle-aged and elderly Asian populations with prehypertension and hypertension, and to provide theoretical basis for formulating accurate exercise prescriptions.Methods:Randomized controlled trials on the effect of exercise on blood pressure in middle-aged and elderly patients with prehypertension and hypertension were collected by PubMed, EMBASE, the Cochrane Library, Web of Science, CNKI and Wanfang Database.The quality of the included studies was evaluated by the Cochrane risk bias assessment tool, and the meta-analysis was performed with Stata 15.0 software.Results:A total of 23 articles and 2 095 subjects were included.Meta analysis showed that compared with the control group, aerobic exercise(WMD=-9.94, 95% CI=-12.59--7.29, P<0.001), resistance exercise(WMD=-11.15, 95% CI=-18.36--3.95, P=0.002) and aerobic combined resistance exercise(WMD=-6.09, 95% CI=-8.87--3.31, P=0.005) could reduce the systolic blood pressure level.Aerobic exercise(WMD=-6.46, 95% CI=-8.20--4.72, P<0.001) and resistance exercise(WMD=-4.38, 95% CI=-8.07--0.69, P=0.02) could reduce the level of diastolic blood pressure, while aerobic combined resistance exercise(WMD=-4.88, 95% CI=-12.87-3.11, P=0.232)had no significant effect on diastolic blood pressure.The results of subgroup analysis indicated that the differences of age, baseline blood pressure, exercise intensity, exercise time, exercise frequency, and motion cycle were the main sources of heterogeneity.The funnel plot and Egger's test indicated that there was no publication bias in this Meta-analysis. Conclusion:Aerobic exercise and resistance exercise both have positive effects on reducing blood pressure of middle-aged and elderly Asian populations with prehypertension and hypertension.

Radiation therapy is an effective method to kill cancer cells and shrink tumors using high-energy X-ray or γ-ray. Radiation pneumonitis (RP) is one of the most serious complications of radiation therapy for thoracic cancers, commonly leading to serious respiratory distress and poor prognosis. Here, we prepared curcumin-loaded mesoporous polydopamine nanoparticles (CMPN) for prevention and treatment of RP by pulmonary delivery. Mesoporous polydopamine nanoparticles (MPDA) were successfully synthesized with an emulsion-induced interface polymerization method and curcumin was loaded in MPDA via π‒π stacking and hydrogen bonding interaction. MPDA owned the uniform spherical morphology with numerous mesopores that disappeared after loading curcumin. More than 80% curcumin released from CMPN in 6 h and mesopores recovered. CMPN remarkably protected BEAS-2B cells from γ-ray radiation injury by inhibiting apoptosis. RP rat models were established after a single dose of 15 Gy ⁶⁰Co γ-ray radiation was performed on the chest area. Effective therapy of RP was achieved by intratracheal administration of CMPN due to free radical scavenging and anti-oxidation ability, and reduced proinflammatory cytokines, high superoxide dismutase, decreased malondialdehyde, and alleviated lung tissue damages were observed. Inhaled CMPN paves a new avenue for the treatment of RP.