Aim Chinese family members always take care of older adults because of obligations stemming from the culture of filial piety and the paucity of a long‐term care system. These caregivers usually perceive high levels of stress that could compromise their psychological health and consequently result in anxiety impairments. This study aimed to assess the anxiety symptoms of Chinese family caregivers of older adults, explore factors associated with these symptoms, and provide theoretical evidence on improving their mental health. Methods A questionnaire survey was conducted face‐to‐face with caregivers of community‐dwelling older adults. The survey asked about the demographic characteristics of the caregivers and older adults, objective caregiving loads, and social support and included the Zung Self‐Rating Anxiety Scale and the Perceived Stress Scale. Results Anxiety symptoms were present in 43.1% of caregivers. The R2 changes indicated that the incremental variance explained by each block of variables was 9.8%, 5.0%, 0.7%, 17.6%, and 2.1% for demographic characteristics of caregivers, demographic characteristics of older adults, objective caregiving loads, perceived stress, and social support, respectively. Perceived stress was the strongest predictor of anxiety symptoms, and social support was positively associated with anxiety symptoms. Factors associated with caregivers' anxiety symptoms were having a chronic disease and living with older adults, as well as older adults’ weight, hours of sleep, and education level. Conclusion Chinese family caregivers of older adults experienced higher levels of anxiety symptoms. Perceived stress could aggravate these symptoms, but social support might assist in alleviating anxiety symptoms from the stress of caregiving.
Background and Objectives: Vascular stenosis and angiogenesis are the major causes of short expectancy of arteriovenous fistula (AVF). Increased expression of vascular endothelial growth factor-A (VEGF-A) has been suggested to play an important role in the pathophysiologic process. Anti-VEGF has been proved to be effective on anti-angiogenesis and applied in clinical practice, but its effect on anti-stenosis remains to be verified before it could be applied to prevent stenosis of AVF. This study was aimed to evaluate the effect of local anti-VEGF therapy to prevent the formation of stenosis in the outflow vein in AVF and its mechanism. Methods: Bioinformatics of VEGF-A and its downstream-regulated molecules from the STRING PPI database were analyzed in this study. The biopsy samples from outflow veins of AVF in patients and C57BL/6 mouse models were analyzed to examine the mechanisms of pathologic vascular stenosis associated with VEGF pathways and their potential therapeutic targets. Results: We found that the reduction of VEGF-A could downregulate downstream molecules and subsequently reduce the intimal hyperplasia and abnormal vascular remodeling by analyzing the STRING PPI database. Venous wall thickening, intimal neointima formation, and apoptosis of vascular endothelial cells in the proliferative outflow vein of the AVF were significantly more obvious, and upregulation of expression of VEGF was observed in dysfunctional AVF in patients. In mouse models, the expression of VEGF, Ephrin receptor B4 (EphB4), matrix metalloproteinase (MMP)2, MMP9, tissue inhibitor of metalloproteinase (TIMP)1, TIMP2, and caspase 3 in the control-shRNA surgical group was significantly higher than in the sham group (P < 0.05), and all of these indicators were significantly lower in lentiviral transfection group and Avastin group than in control-shRNA surgical group (P < 0.05) on the 14th day after AVF operation. Conclusion: VEGF expression is significantly increased in vascular endothelial cells in stenosed or occluded outflow veins of dysfunctional AVF. Local injection of Avastin into the adventitia of the proximal outflow vein in autologous AVF procedure has an excellent potential to prevent the subsequent local stenosis of the proximal outflow vein.
Objective. Previous studies have controversial results about the prognostic role of soluble suppression of tumorigenicity 2 (sST2) in chronic kidney disease (CKD). Therefore, we conduct this meta-analysis to access the association between sST2 and all-cause mortality, cardiovascular disease (CVD) mortality, and CVD events in patients with CKD. Methods. The publication studies on the association of sST2 with all-cause mortality, CVD mortality, and CVD events from PubMed and Embase were searched through August 2020. We pooled the hazard ratio (HR) comparing high versus low levels of sST2 and subgroup analysis based on treatment, continent, and diabetes mellitus (DM) proportion, and sample size was also performed. Results. There were 15 eligible studies with 11,063 CKD patients that were included in our meta-analysis. Elevated level of sST2 was associated with increased risk of all-cause mortality (HR 2.05; 95% confidence interval (CI), 1.51–2.78), CVD mortality (HR 1.68; 95% CI, 1.35–2.09), total CVD events (HR 1.88; 95% CI, 1.26–2.80), and HF (HR 1.35; 95% CI, 1.11–1.64). Subgroup analysis based on continent, DM percentage, and sample size showed that these factors did not influence the prognostic role of sST2 levels to all-cause mortality. Conclusions. Our results show that high levels of sST2 could predict the all-cause mortality, CVD mortality, and CVD events in CKD patients.
Background In patients with chronic kidney disease (CKD), vascular calcification (VC) is common and is associated with a higher risk of all-cause mortality. Shh, one ligand for Hedgehog (Hh) signaling, participates in osteogenesis and several cardiovascular diseases. However, it remains unclear whether Shh is implicated in the development of VC. Methods 2.6 mM inorganic phosphorus was used to induce vascular smooth muscle cells (VSMCs) calcification. Mice were fed with adenine diet supplement with 1.2% phosphorus to induce VC. Results Shh was decreased in VSMCs exposed to inorganic phosphorus, calcified arteries in mice fed with an adenine diet, as well as radial arteries from patients with CKD presenting vascular calcification (VC). Overexpression of Shh inhibited VSMCs ostosteoblastic differentiation and calcification, whereas its silencing accelerated these processes. Likewise, mice treated with SAG (Hh signaling agonist) showed alleviated VC. And mice treated with CPN (Hh signaling antagonist) exhibited severe VC. Additionally, overexpression of Gli2 significantly reversed the pro-calcification effect of Shh silencing on VSMCs, suggesting that Shh inhibited VC via Gli2. Mechanistically, Gli2 interacted with Runx2 and promoted its ubiquitin proteasomal degradation, therefore protecting against VC. Of interest, the pro-degradation effect of Gli2 on Runx2 was independent of Smurf1 and Cullin4B. Conclusions Our study provided deeper insight to the pathogenesis of VC and Shh might be a novel potential target for VC treatment.
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