As a member of the deoxyribonuclease 1 family, DNASE1L3 plays a significant role both inside and outside the cell. However, the role of DNASE1L3 in hepatocellular carcinoma (HCC) and its molecular basis remains to be further investigated. In this study, we report that DNASE1L3 is downregulated in clinical HCC samples and evaluate the relationship between its expression and HCC clinical features. In vivo and in vitro experiments showed that DNASE1L3 negatively regulates the proliferation, invasion and metastasis of HCC cells. Mechanistic studies showed that DNASE1L3 recruits components of the cytoplasmic β‐catenin destruction complex (GSK‐3β and Axin), promotes the ubiquitination degradation of β‐catenin, and inhibits its nuclear transfer, thus, decreasing c‐Myc, P21 and P27 level. Ultimately, cell cycle and EMT signals are restrained. In general, this study provides new insight into the mechanism for HCC and suggests that DNASE1L3 can become a considerable target for HCC.Decreased expression of DNASE1L3 is associated with poor prognosis in patients with HCCDNASE1L3 inhibits the proliferation and cell cycle of HCC cells in vitro and promotes the invasion and metastasis of HCC cells DNASE1L3 inhibits the tumorigenicity and metastasis of HCC cells in vivo DNASE1L3 interacts with β‐catenin and promotes its binding to the β‐catenin destroying complex DNASE1L3 interacts with P21 and stabilizes P21 by mediating the deubiquitin activity 相似文献
观察组患儿肠道双歧杆菌(t=16.217, P < 0.001)、肠球菌(t=10.677, P < 0.001)、乳杆菌(t=8.326, P < 0.001)以及真杆菌(t=12.455, P < 0.001)数量显著低于对照组。轻度组、中度组以及重度组患儿肠道双歧杆菌(F=13.069, P < 0.001)、肠球菌(F=10.269, P < 0.001)、乳杆菌(F=12.036, P < 0.001)以及真杆菌(F=10.698, P < 0.001)数量之间的差异有统计学意义。患儿出生后第10天肠道乳杆菌[(8.37±0.53)lg CFU/g]、双歧杆菌[(9.89±1.61)lg CFU/g]、肠球菌[(7.903±2.12)lg CFU/g]以及真杆菌[(7.12±1.29)lg CFU/g]数量显著低于出生后第20天时的肠道乳杆菌[(8.99±0.31)lg CFU/g]、双歧杆菌[(10.62±2.64)lg CFU/g]、肠球菌[(8.51±2.28)lg CFU/g]以及真杆菌[(7.91±1.01)lg CFU/g]数量(均P < 0.05)。观察组患儿血清补体C3(t=14.183, P < 0.001)、补体C4(t=9.002, P < 0.001)、IgM(t=11.904, P < 0.001)、IgG(t=147.674, P < 0.001)水平显著低于对照组, 而IgA(t=13.874, P < 0.001)水平显著高于对照组。轻度组、中度组以及重度组患儿血清补体C3(F=11.369, P < 0.001)、补体C4(F=10.396, P < 0.001)、IgM(F=11.003, P < 0.001)、IgG(F=9.663, P < 0.001)、IgA(F=9.245, P < 0.001)之间的差异均有统计学意义。C3、C4、IgM、IgG水平从高到低依次为轻度组、中度组以及重度组。IgA水平从高到低依次为重度组、中度组以及轻度组。肠道双歧杆菌、肠球菌、乳杆菌以及真杆菌与C3、C4、IgM、IgG水平呈正相关, 与IgA水平呈负相关。
Cardiac fibrosis is one of the common pathological processes in many cardiovascular diseases characterized by excessive extracellular matrix deposition. SerpinE2 is a kind of protein that inhibits peptidase in extracellular matrix and up-regulated tremendously in mouse model of cardiac fibrosis induced by pressure-overloaded via transverse aortic constriction (TAC) surgery. However, its effect on cardiac fibroblasts (CFs), collagen secretion and the underlying mechanism remains unclear. In this study, DyLight® 488 green fluorescent dye or His-tagged proteins were used to label the exogenous serpinE2 protein. It was showed that extracellular serpinE2 translocated into CFs by low-density lipoprotein receptor-related protein 1 (LRP1) and urokinase plasminogen activator receptor (uPAR) of cell membrane through endocytosis. Knockdown of LRP1 or uPAR reduced the level of serpinE2 in CFs and down-regulated the collagen expression. Inhibition of the endocytosis of serpinE2 could inhibit ERK1/2 and β-catenin signaling pathways and subsequently attenuated collagen secretion. Knockdown of serpinE2 attenuates cardiac fibrosis in TAC mouse. We conclude that serpinE2 could be translocated into cardiac fibroblasts due to endocytosis through directly interact with the membrane protein LRP1 and uPAR, and this process activated the ERK1/2, β-catenin signaling pathways, consequently promoting collagen production. 相似文献
Diabetic cognitive impairment (DCI) is a common diabetic complication with hallmarks of loss of learning ability and disorders of memory and behavior. Glucocorticoid receptor (GR) dysfunction is a main reason for neuronal impairment in brain of diabetic patients. Here, we determined that ipriflavone (IP) a clinical anti‐osteoporosis drug functioned as a non‐steroidal GR antagonist and efficiently ameliorated learning and memory dysfunction in both type 1 and 2 diabetic mice. The underlying mechanism has been intensively investigated by assay against the diabetic mice with GR‐specific knockdown in the brain by injection of adeno‐associated virus (AAV)‐ePHP‐si‐GR. IP suppressed tau hyperphosphorylation through GR/PI3K/AKT/GSK3β pathway, alleviated neuronal inflammation through GR/NF‐κB/NLRP3/ASC/Caspase‐1 pathway, and protected against synaptic impairment through GR/CREB/BDNF pathway. To our knowledge, our work might be the first to expound the detailed mechanism underlying the amelioration of non‐steroidal GR antagonist on DCI‐like pathology in mice and report the potential of IP in treatment of DCI. 相似文献