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1.
The Journal of Practical Medicine ; (24): 19-24,31, 2024.
Article in Chinese | WPRIM | ID: wpr-1020699

ABSTRACT

Objective To explore the mechanism of lipid metabolism disorder promoting the progress of lung cancer based on the oxidized low density lipoprotein(ox-LDL)/human lectin-like oxidized low density lipopro-tein receptor 1(LOX-1)signaling pathway.Methods Eighty-one identified lung adenocarcinoma tissues with paired adjacent non-cancerous tissues(at least 5 cm away from the tumor)were collected from our hospital,and the expression of LOX-1 was detected by immunohistochemistry.LOX-1 was overexpressed in lung adenocarcinoma cell lines(A549 and H1299 cells).Cell invasion ability was measured by Transwell.Cells were treated with different concentrations of oxLDL,and cellular LOX-1 expression was investigated.Results LOX-1 staining in the tumor was significantly stronger than that in the non-cancerous tissue samples(99.4 vs.16.2 for median H score,P<0.001).High LOX-1 expression was significantly correlated with low survival(P<0.001).As compared with the patients without lymph node metastasis,those with lymph node metastasis had higher LOX-1 level(83.2 vs.121.1 for median H score,P<0.01).Overexpression of LOX-1 in lung cancer cells significantly promoted the number of invasive and metastatic cells(P<0.01).In addition,LOX-1 was an essential functional target for oxLDL-induced metastasis of lung cancer cells.Itatinib inhibited the metastasis of LOX-1 overexpressed A549 in vitro.Conclusions With an increase in oxLDL level,the expression of LOX-1 increases.Up-regulation of LOX-1 promotes metastasis of lung cancer,and its mechanism may be related to activation of the JAK1/STAT6 signaling pathway.

2.
Chin. j. integr. med ; Chin. j. integr. med;(12): 179-185, 2023.
Article in English | WPRIM | ID: wpr-971334

ABSTRACT

Lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) have recently been identified to be closely related to the occurrence and development of atherosclerosis (AS). A growing body of evidence has suggested Chinese medicine takes unique advantages in preventing and treating AS. In this review, the related research progress of AS and LOX-1 has been summarized. And the anti-AS effects of 10 active components of herbal medicine through LOX-1 regulation have been further reviewed. As a potential biomarker and target for intervention in AS, LOX-1 targeted therapy might provide a promising and novel approach to atherosclerotic prevention and treatment.


Subject(s)
Humans , Atherosclerosis , Scavenger Receptors, Class E/physiology , Biomarkers , Plant Extracts , Lipoproteins, LDL
3.
Article in Chinese | WPRIM | ID: wpr-1038631

ABSTRACT

@#Objective To explore the relationship between the levels of serum lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) and angiopoietin-like protein 8 (ANGPTL8) and the degree of neurological deficit and prognosis of patients with acute watershed cerebral infarction.Methods From June 2018 to July 2021,105 patients with acute watershed cerebral infarction accepted by our hospital were enrolled as the research group,the NIHSS scale was used to evaluate the degree of neurological deficit,and the patients were divided into mild neurological deficit group and moderate-severe neurological deficit group;the modified Rankin scale was used to evaluate the prognosis of the patients,and they were grouped into a good prognosis group and a poor prognosis group;another 100 healthy subjects were enrolled as the control group,the serum levels of LOX-1 and ANGPTL8 of subjects in each group were detected,and the differences between groups were compared.Receiver operating characteristic (ROC) curve was drawn to analyze the evaluation value of serum LOX-1 and ANGPTL8 levels for the degree of neurological deficit and prognosis in patients with acute watershed cerebral infarction.Results The levels of serum LOX-1 and ANGPTL8 in the study group were obviously higher than those in the control group,the levels of serum LOX-1 and ANGPTL8 in the moderate to severe neurological deficit group were obviously higher than those in the mild neurological deficit group,and the levels of serum LOX-1 and ANGPTL8 in the poor prognosis group were also obviously higher than those in the good prognosis group (P<0.05).The area under the curve (AUC) of serum LOX-1 and ANGPTL8 combined to assess moderate to severe neurological deficit in patients with acute watershed cerebral infarction was 0.894,which was greater than that of LOX-1 (0.763) and ANGPTL8 (0.852) alone (P<0.05);the AUC of the two combined assessment of acute watershed cerebral infarction patients with poor prognosis was 0.932,which was greater than that of LOX-1 and ANGPTL8 alone (P<0.05).Conclusion Serum LOX-1 and ANGPTL8 levels are up-regulated in patients with acute watershed cerebral infarction,and the combination of the two has a higher efficacy in evaluating the degree of neurological deficit and prognosis of patients.

4.
Rev. bras. pesqui. méd. biol ; Braz. j. med. biol. res;54(9): e11062, 2021. tab, graf
Article in English | LILACS | ID: biblio-1249335

ABSTRACT

Dendritic cells (DCs) play a crucial role as central orchestrators of immune system response in atherosclerosis initiation and progression. Lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) is involved in the immune maturation of DCs, but the underlying mechanisms remain unclear. We isolated mouse bone marrow progenitors and stimulated them with granulocyte-macrophage colony-stimulating factor and interleukin (IL)-4 to induce immature DCs. We then treated DCs with oxidized low-density lipoprotein (oxLDL) to induce maturation. LOX-1 siRNA was used to investigate the modulation of LOX-1 on the development of DCs and the underlying signal pathways. CD11c-positive DCs were successfully derived from mouse bone marrow progenitors. OxLDL promoted the expressions of DCs maturation markers and pro-inflammatory cytokines. OxLDL also upregulated LOX-1 expression and activated MAPK/NF-κB pathways. LOX-1 siRNA could attenuate the expression of MAPK/NF-κB pathways and inflammatory cytokines. In conclusion, oxLDL induced the maturation of DCs via LOX-1-mediated MAPK/NF-κB pathway, which contributed to the initiation and progression of atherosclerosis.


Subject(s)
Animals , Rats , Dendritic Cells , NF-kappa B , MAP Kinase Signaling System , Scavenger Receptors, Class E , Lipoproteins, LDL
5.
Article in Chinese | WPRIM | ID: wpr-743730

ABSTRACT

Objective To investigate the changes of soluble lectin-like oxidized low-density lipoprotein receptor-1 (sLOX-1) and omentin-1 in patients with H-type hypertension complicated with acute ischemic stroke, and to analyze the correlation of sLOX-1 and omentin-1 levels with the severity and prognosis of the disease.Methods Totally 136 patients with H-type hypertension complicated with acute ischemic stroke from February2017 to May 2018 were selected as observation group, and 136 non-acute ischemic stroke patients with H-type hypertension in the same period as the control group. The patients of observation group were divided into mild, moderate and severe sub-groups according to NIHSS score, and they were also divided into good prognosis group and poor prognosis group based on modified RANKIN scale (mRS) score. The serum sLOX-1 and omentin-1 levels were detected, and the correlation of sLOX-1 and omentin-1 levels with severity and prognosis of disease was analyzed. Results The serum sLOX-1 level of the observation group was higher, but the serum omentin-1 level lower than that of control group (P < 0.05). With the severity of the disease, the serum sLOX-1 level increased, but the serum omentin-1 level decreased (P < 0.05). The serum sLOX-1 level of good prognosis group was significantly lower, whereas the serum omentin-1 level significantly higher than that of poor prognosis group (P < 0.05). sLOX-1 was positively correlated with NIHSS score and mRS score, while omentin-1 was negatively correlated with NIHSS score and mRS score (P < 0.05). Conclusions The levels of serum sLOX-1 and omentin-1 are closely related to the severity and prognosis of patients with H-type hypertension complicated with acute ischemic stroke, which could be used as markers for evaluating the severity and prognosis of the patients.

6.
Clinical Medicine of China ; (12): 362-365, 2018.
Article in Chinese | WPRIM | ID: wpr-706686

ABSTRACT

Objective To investigate the correlation between serum lectin like oxidized low density lipoprotein receptor-1 ( sLOX-1 ) and left ventricular diastolic function in patients with essential hypertension. Methods From January 2016 to July 2017, one hundred and forty-six patients with essential hypertension were selected and divided into two groups according to the ratio of E/ A,the left ventricular diastolic function group (76 cases) and the left ventricular diastolic function group (70 cases),the sLOX-1 level of the patients was detected by ELISA method, and the left ventricular diastolic function was evaluated by echocardiography. The correlation between sLOX-1 and left ventricular diastolic function was analyzed. Results The serum sLOX-1 levels in left ventricular diastolic function group (( 208. 12 ± 13. 48 ) μg/ L ) were significantly higher than those inthe left ventricular diastolic function group ((152. 12 ± 12. 96) μg/ L) . The difference between the two groups was statistically significant (t= 6. 586,P= 0. 000). Logistic regression analysis showed that serum sLOX-1 was a influence factor of left ventricular diastolic function (OR= 2. 42,95%CI 1. 42-2. 82,P = 0. 036) . Conclusion The levels of serum sLOX-1 can be used as a indicator of left ventricular diastolic function.

7.
Herald of Medicine ; (12): 13-16, 2017.
Article in Chinese | WPRIM | ID: wpr-506709

ABSTRACT

Objective To observe the protective effect and mechanism of 2,3,5,4 '-tetrahydroxystilbene-2-O-beta-D-glucoside ( THSG) on atherosclerosis in ApoE konck-out mice. Methods A total of 24 ApoE knock-out mice were randomly divided into normal control group (n=8), model control group (HFD, high-fat diet, n=8) and treated group (THSG, 20 mg· kg-1, i. g. , n=8). The atherosclerosic plaque of aorta wall and aorta root were measured by oil red O staining;The expression of lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) in human umbilical vein endothelial cells (HUVEC) through C-reaction protein ( CRP) was studied by Western blotting. Results The atherosclerosis plaque in normal control group was not observed. The lipid accumulation decreased in the aorta and the plaque areas in the aortic sinus in THSG treated-group compared with model control group. Moreover, THSG down-regulated CRP-induced LOX-1 expression in HUVEC. Conclusion The atheroscletosis plaque in ApoE knock-out mice was decreased by THSG. The mechanism might be related to the inhibition of the expression of LOX-1 protein.

8.
Chongqing Medicine ; (36): 4971-4973, 2017.
Article in Chinese | WPRIM | ID: wpr-691720

ABSTRACT

Objective To investigate the correlation between serum sFas and sLOX-1 with occurrence and development of acute coronary syndrome (ACS).Methods A total of 52 patients definitely diagnosed ACS (ACS group) by coronary artery angiography (CAG) were enrolled,including 23 cases of unstable angina (UA group) and 29 cases of acute myocardial infarction (AMI group),and contemporaneous 58 cases of non-coronary arterial stenosis confirmed by CAG were selected as the control group (NC group).The serum levels of sFas and sLOX-1 were measured by enzyme linked immunosorbent assay.Results Compared with the NC group,the serum levels of sFas and sLOX-1 in the ACS group were increased,the serum levels of sFas and sLOX-1 in the AMI group and UA group were higher than those in the NC group,moreover which in the AMI group were higher than those in the UA group (P<0.01).The serum sFas level in the ACS group was positively correlated with the sLOX-1 level (r=0.825,P=0.001),but both had no obvious correlation with the serum levels of CK-MB and cTnⅠ (P>0.05).Conclusion High levels of serum sFas and sLOX-1 may be the risk factors of ACS.

9.
Chongqing Medicine ; (36): 2765-2768, 2016.
Article in Chinese | WPRIM | ID: wpr-495426

ABSTRACT

Objective To observe the effects of Shenqi Mixture on sLOX‐1 ,SOD ,MDA ,NO ,ET and lipid level among the patients with different types of hyperlipidemia and to investigate the mechanism of blood vessel protection .Methods Sixty‐four patients with hyperlipidemia were divided into high TC group (20 cases) ,high TG group(12 cases) ,mixed type hyperlipidemia group(23 cases) and low HDL group(9 cases) .Every patients were treated with Shenqi Mixture 10 g/d ,treatment course was 6 weeks .Other 25 healthy people of normal blood lipid were selected as the control group .The levels of sLOX‐1 ,SOD ,MDA ,NO ,ET and blood lipid were detected before and after treatment .Results The levels of sLOX‐1 was increased by high TC and mixed type of hyperlipidemia(P0 .05) .Conclusion Shenqi Mixture has good effects on blood vessel protection and protects the vascular endothelial cells ,thus plays the protective role on blood vessel .

10.
Chinese Journal of Immunology ; (12): 1633-1636, 2015.
Article in Chinese | WPRIM | ID: wpr-484783

ABSTRACT

Objective:To investigate the influence of Xuefu Zhuyu Decoction ( XZD) contained Drug-Serum on the expression of TLR4/NF-κB signals and LOX-1, TNF-α, ICAM-1, VCAM-1 in HUVECs, and to study its possible anti-atherosclerotic mechanism.Methods:HUVECs was cultured in vitro and divided equally into the normal group ,the model group,the ATV group and the XZD group in random.HUVECs were stimulated with LPS for 2 h,then treated separately with the drug-serum and atorvastatin for 24 h,finally measured the expression of TLR 4, MyD88, TRAF-6, NF-κB, LOX-1, TNF-α, ICAM-1 and VCAM-1 mRNA with real-time PCR,the expression of TLR4,NF-κB,LOX-1,TNF-α,ICAM-1 and VCAM-1 protein were analyzed by Western blot method .Results:Protein and mRNA expressions of TLR4,MyD88,TRAF-6,NF-κB,LOX-1,TNF-α,ICAM-1 and VCAM-1 increased significantly after LPS stimulation(vs normal control group,P<0.01),Xuefu Zhuyu Decoction decreased the high expression of TLR 4,MyD88,TRAF-6, NF-κB,LOX-1,TNF-α,ICAM-1 and VCAM-1(vs model group,P<0.05 ).Conclusion:Xuefu Zhuyu Decoction can block the high ex-pression of TLR4 and its downstream signal transduction pathway and the high expression of LOX -1, TNF-α, ICAM-1 and VCAM-1.Maybe it′s the mechanism of Xuefu Zhuyu Decoction exert the function of anti-artherosclerosis.

11.
Clinical Medicine of China ; (12): 76-78, 2014.
Article in Chinese | WPRIM | ID: wpr-444241

ABSTRACT

Objective To investigate whether soluble lectin-like oxidized low-density lipoprotein receptor-1 (sLOX-1) as the early diagnostic biomarker of acute ST elevation myocardial infarction (STEAMI).Methods Sixty-five patients with STEAMI and 30 patients with stable coranary heart disease or other heart disease(control group) were enrolled as our subjects.Serum sLOX-1 levels were measured.Results The median(P25,P75) of Serum sLOX-1 in the patients with STEMI were 210.0 (130.0,356.0) ng/L,significantly higher than that of control group(65.5 (55.2,85.2) ng/L,Z =6.17,P < 0.001).Logistic regression analysis revealed that sLOX-1 alone was an independent factor associated with STEAMI (B =0.036,P < 0.001).The area under the ROC curve of sLOX-1 for detecting STEMI was 0.895,and 95% CI was 0.831-0.959 (P<0.001).Taking sLOX-1 =87.5 ng/L as cut-off value,the sensitivity was 89.6% and specificity was 82.4%for the diagnosis of STEAMI.Conclusion Serum sLOX-1 was significantly higher in the STEAMI and it might served as the early diagnostic marker for STEAMI.

12.
Chinese Circulation Journal ; (12): 841-845, 2014.
Article in Chinese | WPRIM | ID: wpr-459491

ABSTRACT

Objective: To investigate the inlfuence of angiotensin converting enzyme 2 (ACE2) on lectin-like oxidized low density lipoprotein receptor-1 (LOX-1) protein expression and to explore the protective effect of ACE2 on vascular endothelial cells. Methods: Our work includedin vitro andin vivo studies. For in vitro experiment, the human umbilical vein endothelial cell (HUVEC) were cultured and transfected with replication deficient recombinant adenovirus of ACE2 (Ad-ACE2), and LOX-1 protein expression stimulated by angiotensin 2 was examined by Western blot analysis. Forin vivo study, atherosclerosis plaques were induced in 20 apolipoprotein E-deifcient (ApoE-/-) mice, and then randomly divided them into 2 groups: ACE2 group, the mice received Ad-ACE2 (2.5×109 pfu/ml) injection through caudal vein, EGFP (enhanced green lfuorescent protein) group, the mice received equal replication deifcient recombinant adenovirus of EGFP (Ad-EGFP) injection through caudal vein.n=10 in each group. The animals were executed after 1 month treatment to collect abdominal aorta. Lipid content in atherosclerosis plaque was evaluated by Oil red O staining and LOX-1 protein expression was examined by immunohistochemistry and Western blot analysis. Results: Bothin vitro andin vivo experiments conifrmed that endothelial cell LOX-1 protein expression was signiifcantly inhibited by ACE2 transfection. The lipid content in ACE2 group was obviously lower than that in EGFP group byin vivo study. Conclusion: ACE2 may inhibit LOX-1 protein expression and therefore reduce the progress of atherosclerosis.

13.
Article in Chinese | WPRIM | ID: wpr-790350

ABSTRACT

Objective Lox-1 ( lectin-like oxidized low-density lipoprotein receptor-1 ) was one of the main receptor of ox-LDL, which took an important role in vascular endothelial dysfunction , the formation of foam cells , and the stability of atherosclerotic plaques .To investigate the role of Lox-1 in cardiovascular diseases .Methods The literatures of Lox-1 in cardiovascular diseases retro-spectively were reviewed .Results As a new ox-LDL scavenger receptor , Lox-1 played an important role in cardiovascular diseases . Conclusion Lox-1 might provide new ideas for cardiovascular diseases .

14.
Article in Chinese | WPRIM | ID: wpr-850336

ABSTRACT

Objective To investigate the effects of HMG-CoA reductase inhibitor rosuvastatin on atherosclerosis and lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1), and nuclear factor (NF)-kB p65 expressions in apolipoprotein E (ApoE)-deficient mice. Methods Twenty six-week-old ApoE-deficient male mice were randomly divided into hyperlipidemia model group (n=10) and rosuvastatin group (n=10), and they were fed high-fat diet for 13 weeks. Ten six-week-old C57BL/6J (wild type, WT) male mice were selected as normal control group, and were fed normal diet for 13 weeks. After 13 weeks, blood was drawn from the mice to determine serum levels of total cholesterol (TCH), triglyceride (TG), and low density lipoprotein cholesterol (LDL-C). These mice were sacrificed, and their aortas were obtained and examined with HE staining; Western blotting and RT-PCR were used to analyze LOX-1, NF-kB p65 expression intensity in aorta tissue quantitatively. Results The serum level of TCH, TG and LDL-C in rosuvastatin group were lower than those in hyperlipidemia model group (P<0.05). Pathological observation showed that atherosclerotic lesions of the aortas were aggravated significantly in hyperlipidemia model group but alleviated in rosuvastatin group compared with normal control group. Compared with normal control group, LOX-1, NF-kB p65 protein and mRNA expressions significantly increased in hyperlipidemia model group (P<0.05) and reduced in rosuvastatin group (P<0.05). Conclusions Rosuvastatin may lower blood lipid significantly, alleviate the degree of atherosclerotic lesions, and inhibit LOX-1, NF-kB p65 protein and mRNA expressions in the aortic tissue of ApoE-deficient mice. Its anti-athrosclerosis effect is related to down regulation of LOX-1 and NF-kB p65 expressions.

15.
Article in Chinese | WPRIM | ID: wpr-446068

ABSTRACT

AIM:To investigate the effects of angiotensin II ( Ang II) on the immune maturation and the oxi-dized low-density lipoprotein (Ox-LDL)-uptaking capacity of human monocyte-derived dendritic cells (DCs).METH-ODS:Human peripheral blood mononuclear cells were isolated by density gradient centrifugation , and the monocytes were purified by positive selection with anti-CD14 magnetic beads.After cultured with rhGM-CSF (100 μg/L) and rhIL-4 (50μg/L) for 5 d, the monocytes differentiated into immature DCs .On the 6th day of the culture, the cells were treated with various concentration levels of Ang II or pretreated with losartan .The immunophenotypic expression of HLA-DR and CD83 was analyzed by flow cytometry .The secretion levels of IL-12 and IFN-γin the culture supernatants were measured by ELISA.Furthermore, DCs were incubated with DiI-labelled Ox-LDL.The DiI-Ox-LDL-incorporated fraction was investiga-ted by flow cytometry .The mRNA expression of 3 scavenger receptors , scavenger receptor A ( SR-A) , CD36 and lectin-like oxidized low-density lipoprotein receptor 1 (LOX-1), was examined by real-time PCR.RESULTS: Ang II induced the maturation of human monocyte-derived DCs, stimulated the expression of CD83 and HLA-DR, and promoted the secre-tion of IL-12 and IFN-γ, which were suppressed by losartan .Furthermore, Ang II increased the Ox-LDL-uptaking capacity of DCs, which was partially reduced by losartan .The incubation of DCs with Ang II enhanced the mRNA expression of LOX-1 in a dose-dependent manner , which was reduced by losartan .However, the expression of SR-A and CD36 was not changed .CONCLUSION:Ang II promotes the immune maturation of human monocyte-derived DCs and increases the up-take of Ox-LDL probably through the up-regulation of LOX-1 expression.

16.
Tianjin Medical Journal ; (12): 1059-1062, 2013.
Article in Chinese | WPRIM | ID: wpr-474689

ABSTRACT

Objective To investigate the effects of simvastatin on the expression of lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) induced by oxidized low-density lipoprotein (ox-LDL) or Glucose in U937 macrophages, and explore the role of NF-κB in modulating of LOX-1 expression. Methods U937 macrophages were treated with PMA to induce differentiation, which were co-cultured with 50 mg/L ox-LDL or/and 25 mmol/L glucose. Pyrrolidine dithiocarbamate (PDTC) and simvastatin (1 μmol/L or 10 μmol/L) were used to treat cells. The expression of LOX-1 protein and NF-κB ac- tivity were detected by enzyme-linked immunosorbent assay technology. The expression of LOX-1 mRNA was measured by RT-PCR. Results The expression of LOX-1 was up regulated by ox-LDL, glucose and combination of both. The inhibitor of NF-κB PDTC suppressed this up-regulation. Simvastatin suppressed the expression of LOX-1 induced by ox-LDL, and showed a significant effect in the higher concentration. There was no significant effect of simvastatin on the expression of LOX-1 induced by glucose. The variation of NF-κB activity was similar to that of LOX-1 expression. Conclusion Simvas- tatin suppressed the expression of LOX-1 induced by ox-LDL, while no significant effect on the expression of LOX-1 in- duced by glucose. The expression and regulation of LOX-1 were related with NF-κB pathway.

17.
Article in Chinese | WPRIM | ID: wpr-427218

ABSTRACT

Diabetic rat model was established by peritoneal injection of streptozocin.At the end of 2 weeks,oxidized low-density lipoprotein (oxLDL) level in diabetic rats was raised [ ( 2.87 ± 0.40 vs 2.27 ± 0.36 ) μg/dl,P<0.05 ] and endothelium-dependent relaxation was sluggish compared with normal rats.At the end of 6 weeks,oxLDL level continued to increase [ 4.32 ±0.66 ) μg/dl,P<0.01] and endothelium-dependent maximum relaxation ( Rmax ) was decreased obviously ( P <0.01 ).Meanwhile,the protein and mRNA expressions of lectin-like oxidized lowdensity lipoprotein receptor-1 ( LOX-1 ),NF-kB,and ICAM-1 on vessel wall of diabetic rats were higher than those in normal rats,and LOX-1 mRNA was positively correlated with the levels of oxLDL,NF-kB,and ICAM-1 mRNA,while negatively correlated with Rmax,indicating that OxLDL/LOX-1 system may cause early endothelial dysfunction in diabetes via activating NF-kB and up-regulating ICAM-1 expression.

18.
Zhongnan Daxue xuebao. Yixue ban ; (12): 939-948, 2011.
Article in Chinese | WPRIM | ID: wpr-423846

ABSTRACT

Cardiac fibroblasts play a pivotal role in cardiac remodeling.In response to various pro-fibrotic stimuli,such as pro-inflammatory cytokines,anoxia-reoxygenation and pressure overload as well as aging,cardiac fibroblasts undergo proliferation,migration and activation,leading to the accumulation of extracellular matrix components and increased thickness and stiffness of heart.The ligands for peroxisome proliferator-activated receptor γ,especially thiazolidinediones,modulate the function of cardiac fibroblasts and the progression of cardiac remodeling,especially under pathological conditions.Unfortunately these agents have not been found to be consistently beneficial in heart failure.Although the precise intracellular signaling pathways are not fully understood,existing evidence strongly supports the involvement of oxidative stress and related signaling pathways.Further,peroxisome proliferator-activated receptor γ and lectin-like oxidized low-density lipoprotein receptor-1 together play critical roles in thiazolidinediones-modulated cardiac fibroblast dysfunction.

19.
Article in Chinese | WPRIM | ID: wpr-841071

ABSTRACT

Objective: To investigate the effect of oxidized low-density lipoprotein (ox-LDL) on expression of lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1), transforming growth factor beta 1 (TGF-β 1), and secretion of extracelluar matrix (ECM) in cultured rat glomerular mesangial cells (GMCs), and to investigate the influence of LOX-1 inhibitor polyinosinic acid (PIA) on the effect of ox-LDL. Methods: Rat glomerular masengial cells were cultured in vitro. RT-PCR was employed to determine the LOX-1 mRNA expression in GMCs incubated with different concentrations of ox-LDL (0, 25, 50, 100 μg/ ml). The expression of LOX-1 and TGF-β1, mRNA was also determined by RT-PCR in the blank control group, ox-LDL (50 μg/ml) group and PIA(50 μg/ml ox-LDL+250 μg/ml PIA) group. The contents of TGF-β1 fibronectin (FN), and collagen IV (Col IV) in the supernatants of the above 3 groups were determined by ELISA. Results: RT-PCR showed that LOX-1 mRNA expression in 25, 50 and 100 μg/ml ox - LDL groups was significantly higher than that of blank control group(P<0.05), with the highest expression found in the 50 μg/ml ox-LDL group; the expression of LOX-I and TGF-β 1 mRNA was significantly higher in 50 μg/ml ox-LDL group than that in the other 2 groups (P< 0.01). ELISA results demonstrated that the supernatant contents of TGF-β1, FN and Col IV were significantly higher in 50 μg/ml ox-LDL group than those in the other 2 groups (P< 0.05). Conclusion: Ox-LDL can upregulate the expression of LOX-1 and TGF-β1, mRNA and the secretion of extracelluar matrix in GMCs. Polyinosinic acid can antagonize the above effect of ox-LDL, suggesting that LOX-1 may participate in ox-LDL-induced GMCs damage and is involved in the development and progression of glomerulosclerosis.

20.
Article in Chinese | WPRIM | ID: wpr-397207

ABSTRACT

Lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) is a specific receptor of oxidized low-density lipoprotein (oxLDL) expressed in endothelial cells. It is a type Ⅱ single-chain transmembrane protein and belongs to C-type lectin family. LOX-1 leads to the injury of endothelial cells by mediating oxLDL, and plays a role in the initiation and progression of atherosclerosis, hypertension, thrombosis. This article reviews the association between LOX-1 and atherosclerosis.

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