Kaempferol from Semen cuscutae attenuates the immune function of dendritic cells

Dendritic cells (DCs) are the critical leukocytes in regulating immune responses. Accordingly, DCs are the major target in the development of immunomodulators. In this study, we examined the effect of Semen cuscutae (SC), an important traditional Chinese medicine, on mouse bone marrow-derived DCs. We found that the n-butanol and methanol extracts of SC significantly suppressed LPS-stimulated DC activation. Several flavonoids were verified in the extracts using HPLC, and then kaempferol was identified as the major flavonoid in the methanol fraction of SC. Kaempferol was able to reduce cytokines and chemokines produced by LPS-stimulated DCs, and this reduction was not due to its cytotoxicity on DCs. In addition, DC maturation was impaired by kaempferol. Furthermore, kaempferol abrogated the ability of LPS-stimulated DCs to promote Ag-specific T cell activation, both in vitro and in vivo. Thus, we show for the first time that SC exhibits an immunosuppressive effect on DCs and that the active ingredient kaempferol attenuates DC function, which suggests that kaempferol has potential in the treatment of chronic inflammatory and autoimmune diseases.     

自身免疫性心肌炎大鼠模型血清HA和LN的表达

目的:探讨实验性自身免疫性心肌炎(EAM)大鼠血清透明质酸(HA)和层黏连蛋白(LN)的动态变化及其意义.方法:Lewis大鼠60只,随机等分为6组,其中5组采用心肌C蛋白和完全弗氏佐剂足底注射,百日咳毒索腹腔内注射制作EAM大鼠模型.在免疫注射后1w、2w、4w、6w和8w,取心脏,行苏木索-伊红染色检测心肌炎症积分...     

肾络通对阿霉素肾病大鼠细胞表型转化的影响

目的:肾络通对阿霉素诱导的肾病大鼠细胞表型转化的影响.方法:单侧肾切除加重复阿霉素尾静脉注射制作肾病模型,以α-SMA、FN、LN等为观察指标,采用免疫组化、病理图像分析和流式细胞检测等方法,进行阳性表达细胞定位和半定量及蛋白表达定量分析.结果:阿霉素肾病模型组大鼠肾小管间质有α-SMA明显表达,阳性细胞率和蛋白表达定量分析明显高于假手术组,且伴有FN、LN在肾小管间质和肾小球的大量沉积,肾络通组各项指标较模型组为低.结论:肾络通能抑制肾小管上皮细胞表型转化,减少FN、LN等细胞外基质的沉积.     

Comparative analysis of methodologies for predicting overall survival in patients with non-small cell lung cancer based on the number and rate of resected positive lymph nodes: A study based on the SEER database for 2010 through 2019

Background

Lymph node (LN) metastasis is crucial in non-small cell lung cancer (NSCLC) prognosis and treatment, but the TNM system lacks LN quantity consideration. Our goal is to investigate the role of positive LNs (nPLN) and positive LN rate (LNR) in overall survival (OS) and assess whether they offer higher value in prognostic assessment of NSCLC than N-stage.

Methods

Patients were stratified into four subgroups using X-Tile software. Statistical analysis was conducted using the Kaplan–Meier method, univariate analysis, and multivariate Cox regression analysis. Model performance was evaluated using the Harrell consistency index (C-index), Akaike information criterion (AIC), and Bayesian information criterion (BIC). The prognostic performance of the nodal classification was validated using overall survival as the endpoint.

Results

The survival curves demonstrate distinct disparities between each nPLN and LNR category. A pronounced trend toward deteriorating overall survival from N-PLN 1 to N-PLN 2+ was observed across all tumor size categories. However, the differences between each LNR category were only significant for tumors ≤3 cm and 5–7 cm. Notably, both nPLN and LNR classifications displayed a higher C-index, lower AIC, and lower BIC compared with the N staging. Furthermore, the LNR classification provided superior prognostic stratification when compared with the nPLN classification.

Conclusions

Our results demonstrate that nPLN and LNR classifications may offer improved prognostic performance compared with the current N classification for LN-positive NSCLC patients. Nonetheless, more studies are needed to assess the feasibility of incorporating these classifications into the next TNM staging system.     

Efficacy and Safety of Belimumab in Patients With Lupus Nephritis: Subgroup Analyses of a Phase 3 Randomized Trial in the East Asian Population

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