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RBCs of COPD patients are more spherical than healthy volunteers. Experimentally, RBC spherization induces increased platelet transport to the wall. Additional studies are needed to understand the link between the effect of RBCs on platelet transport and the increased cardiovascular events observed in COPD patients.Utilizing a chiral bicyclic imidazole organocatalyst and adopting a continuous injection process, an alternative route has been developed for the efficient synthesis of chiral phthalidyl ester prodrugs via dynamic kinetic resolution of 3-hydroxyphthalides through enantioselective acylation (up to 99 % ee). The computational studies suggest a general base catalytic mechanism differing from the widely accepted nucleophilic catalytic mechanism. The structure analysis of the key transition states shows that the CH-π interactions and not the previously considered cation/π-π interactions between the catalyst and substrate is the dominant factor giving rise to the observed stereocontrol.
The association between cardioprotective aspirin and risk of age-related macular degeneration (AMD) is still controversial up to date. We aimed to analyze the risk of AMD between aspirin users and non-aspirin users.
This was a retrospective cohort study by using claims data from the National Health Insurance Research Database. Patients aged more than 45 years old who initiated aspirin during 2002 to 2012 were followed till 2013. We first selected an age and sex-matched cohort, then identified aspirin users and non-aspirin users as propensity score-matched cohort. Cox proportional hazard regression model was applied to compare their hazards and 95% confidence intervals. Incidence of newly developed AMD, neovascular AMD, and other-AMD was calculated.
We identified 204 085 regular aspirin users and 478 048 non-aspirin users from our datasets. The univariate HR was 2.85 (95% CI, 2.75-2.96), and the multivariate HR was 2.54 (95% CI, 2.44-2.65). In the PS-matched cohort, the HR was 2.38 (95% CI, 2.25-2.52). The incidence of aspirin users for AMD risk was 11.95 per 1000 person-year, while the incidence of non-aspirin users was only 3.92 per 1000 person-year.
Patients with regular use of aspirin had higher risk in developing AMD compared to non-aspirin users and suggest to have regular visual acuity and funduscopic examination.
Patients with regular use of aspirin had higher risk in developing AMD compared to non-aspirin users and suggest to have regular visual acuity and funduscopic examination.
TTC32-WDR35 gene cluster has been genome-wide significantly associated with coronary artery disease (CAD). However, the common variants in this region contributing to CAD risk remain elusive.
We performed a case-control study enrolling 935 CAD cases and 935 age-sex-frequency-matched controls from unrelated southwest Chinese Han population. Five variants were determined by TaqMan assay.
This study indicated that rs721932 CG genotype was associated with CAD risk (OR=0.68, 95% CI 0.54-0.86; P=.001). Stratified analysis showed that the risk associated with rs12617744 AA genotype was robust in male (OR=0.62, 95% CI 0.42-0.93, P=.02). The gene dosage of the risk allele at rs12617744 showed a significant association with left circumflex artery disease (P=.027) and the number of vascular lesions in patients (P=.034). Moreover, the gene dosage of rs721932 risk allele was associated with vascular lesion numbers (P=.048) and the progression of CAD (P=.028). Compared with carriers of major alleles, the AA genotype of rs12617744 and GG genotype of rs721932 were both associated with plasma HDL level (P=.009 and 0.004, respectively). Expression quantitative trait locus (eQTL) results showed significantly different TTC32 expression of subjects as a function of SNPs (rs2278528, rs7594214, and rs721932) genotype in the artery. Besides, FPRP analysis did support the strong links between polymorphisms and CAD risk.
SNP rs721932 at TTC32-WDR35 Gene Cluster was associated with CAD risk, and rs12617744 was associated with the risk of CAD among males. Both SNPs may contribute to the regulation of plasma HDL levels and possibly to the severity of CAD in Chinese Han population.
SNP rs721932 at TTC32-WDR35 Gene Cluster was associated with CAD risk, and rs12617744 was associated with the risk of CAD among males. GSK1016790A Both SNPs may contribute to the regulation of plasma HDL levels and possibly to the severity of CAD in Chinese Han population.Erectile dysfunction (ED) is a major health issue among men with diabetes, and ED induced by diabetes mellitus (DMED) is particularly difficult to treat. Therefore, novel therapeutic approaches for the treatment of DMED are urgently needed. Exosomes, nanosized particles involved in many physiological and pathological processes, may become a promising tool for DMED treatment. In this study, we investigated the therapeutic effect of exosomes derived from corpus cavernosum smooth muscle cells (CCSMC-EXOs) on erectile function in a rat model of diabetes and compared their effect with that of exosomes derived from mesenchymal stem cells (MSC-EXOs). We incubated labelled CCSMC-EXOs and MSC-EXOs with CCSMCs and then observed uptake of the exosomes at different time points using laser confocal microscopy. CCSMC-EXOs were more easily taken up by CCSMCs. The peak concentration and retention time of labelled CCSMC-EXOs and MSC-EXOs in the corpus cavernosum of DMED rats after intracavernous injection were compared by in vivo imaging techniques. Intracavernous injection of CCSMC-EXOs was associated with a relatively high peak concentration and long retention time. Our data showed that CCSMC-EXOs could improve erectile function in DMED rats. Meanwhile, CCSMC-EXOs could exert antifibrotic effects by increasing the smooth muscle content and reducing collagen deposition. CCSMC-EXOs also increased the expression of eNOS and nNOS, followed by increased levels of NO and cGMP. These findings initially identify the possible role of CCSMC-EXOs in ameliorating DMED through inhibiting corporal fibrosis and modulating the NO/cGMP signalling pathway, providing a theoretical basis for a breakthrough in the treatment of DMED.