ABSTRACT
Aim To investigate the effects of dagliflozin (DAPA) on atrial tachyarrhythmia (AT) in rats with right heart failure (RHF) due to pulmonary arterial hypertension (PAH) and the underlying mechanisms. Methods Sixty male SD rats were randomly divided into four groups: control group (CTL group), model group (MCT group), MCT + low-dose DAPA intervention group (MCT + LD group) and MCT + high-dose DAPA intervention group (MCT + HD group). After 35 days of continuous intervention, the model and cardiac function evaluation, atrial structural remodelling assessment, inflammatory factor detection, and in vivo cardiac electrophysiology experiments were completed. Results DAPA reduced menn pulmonaryarterial pressure (mPAP) and menn right ventricular pressure (mRVP) in the model rats (P <0.05), attenuated the inflammatory response (P < 0.05), reduced right atrial fibrosis (P <0.05), reduced AT induction rate (P < 0.05) and mean atrial tachyarrhythmia duration (MATD) (P < 0.05), the extent of which was more pronounced in the high-dose DAPA intervention group. Conclusions DAPA can reduce AT susceptibility in PAH-induced RHF rats, and the mechanisms may be related to the inhibition of systemic inflammation and anti-atrial fibrosis by DAPA.
ABSTRACT
Objective:A comprehensive and in-depth analysis method for identification of chemical constituents in Suanzaoren Tang granules was established. Method:Ultra-performance liquid chromatography-quadrupole-time of flight mass spectrometry （UPLC-Q-TOF-MS/MS） was employed with the mobile phase of 0.1% formic acid aqueous solution （A）-acetonitrile （B） for gradient elution （0-8 min， 5%-17%B； 8-10 min， 17%B； 10-11 min， 17%-18%B； 11-12 min， 18%-20%B； 12-17 min， 20%-23%B； 17-22 min， 23%-33%B； 22-30 min， 33%-60%B； 30-32 min， 60%-100%B； 32-36 min， 100%B）， the flow rate of 0.3 mL·min<sup>-1</sup> and electrospray ionization （ESI）. High quality MS/MS data were scanned in positive and negative ion modes with scanning range of <italic>m</italic>/<italic>z</italic> 50-1 500. The local database of the chemical components from different Chinese medicines in Suanzaoren Tang granules was established by SCIEX OS software. Then the chemical components in Suanzaoren Tang granules were characterized by matching with the local database and comparing with the reference substance and literature information. Result:A total of 134 compounds were characterized and identified under positive and negative ion modes， mainly including flavonoids， triterpenoids， phthalides， steroidal saponins， alkaloids and organic phenolic acids. In addition， the sources of Chinese medicines for all compounds identified in Suanzaoren Tang granules were assigned. Among them， 41 were from Ziziphi Spinosae Semen， 11 were from Poria， 22 were from Anemarrhenae Rhizoma， 28 were from Chuanxiong Rhizoma and 35 were from Glycyrrhizae Radix et Rhizoma. Conclusion:The method can be used to identify the chemical constituents in Suanzaoren Tang granules systematically， quickly and accurately， which can provide a new strategy for the rapid and accurate identification of other Chinese patent medicines.
ABSTRACT
BACKGROUND: Both proximal femoral nail anti-rotation (PFNA) and joint replacement in treatment of intertrochanteric femoral fracture can guarantee early bed removal and reduce long-term bed complications, but there are still more controversies in the selection of indications for the two methods.OBJECTIVE: To observe the differences in clinical effects of artificial joint replacement and PFNA in treatment of unstable intertrochanteric femoral fracture in elderly. METHODS: Totally 56 patients with Evans-Jensen types III-V intertrochanteric femoral fracture aged older than 65 years were enrolled in this study. Follow-up was conducted for 12 months. 11 cases did not complete follow-up visit. Among the remaining 45 cases, 27 patients were treated with artificial joint replacement, and 18 patients were treated with PFNA. Operation time, intraoperative blood loss, and postoperative weight-bearing time were compared between the two groups. Postoperative hip function was compared using Harris score between both groups. Postoperative complications were evaluated by clinical and radiological manifestations in both groups within 1 year after surgery. RESULTS AND CONCLUSION: (1) Operation time and postoperative weight-bearing time were shorter in artificial joint replacement group than in the PFNA group (t=5.596, t=14.142, P < 0.05). (2) At postoperative 1, 3 and 6 months, Harris score was significantly higher in the artificial joint replacement group than in the PFNA group (t=8.301, t=10.017, t=8.593, P < 0.05). Harris score was similar between the two groups at postoperative 1 year (t=1.541, P > 0.05). (3) The total incidence of complications was 22% in artificial joint replacement group and 23% in PFNA group; there were no statistical differences between the two groups (χ2=0.180, P > 0.05). (4) For elderly patients with unstable intertrochanteric femoral fracture, artificial joint replacement and PFNA can obtain satisfactory effect. The operation time of artificial joint replacement is short, and early weight-bearing contributes to reducing long-term bed complications.