Objective Microcystin-leucine-arginine(MC-LR)exposure induces lipid metabolism disorders in the liver.Secreted frizzled-related protein 5(SFRP5)is a natural antagonist of winglesstype MMTV integration site family,memb...Objective Microcystin-leucine-arginine(MC-LR)exposure induces lipid metabolism disorders in the liver.Secreted frizzled-related protein 5(SFRP5)is a natural antagonist of winglesstype MMTV integration site family,member 5A(Wnt5a)and an anti-inflammatory adipocytokine.In this study,we aimed to investigate whether MC-LR can induce lipid metabolism disorders in hepatocytes and whether SFRP5,which has anti-inflammatory effects,can alleviate the effects of hepatic lipid metabolism by inhibiting the Wnt5a/Jun N-terminal kinase(JNK)pathway.Methods We exposed mice to MC-LR in vivo to induce liver lipid metabolism disorders.Subsequently,mouse hepatocytes that overexpressed SFRP5 or did not express SFRP5 were exposed to MC-LR,and the effects of SFRP5 overexpression on inflammation and Wnt5a/JNK activation by MC-LR were observed.Results MC-LR exposure induced liver lipid metabolism disorders in mice and significantly decreased SFRP5 mRNA and protein levels in a concentration-dependent manner.SFRP5 overexpression in AML12cells suppressed MC-LR-induced inflammation.Overexpression of SFRP5 also inhibited Wnt5a and phosphorylation of JNK.Conclusion MC-LR can induce lipid metabolism disorders in mice,and SFRP5 can attenuate lipid metabolism disorders in the mouse liver by inhibiting Wnt5a/JNK signaling.展开更多
Objective Obstructive sleep apnea (OSA) is closely related to obesity, insulin resistance and inflammation. Secreted frizzled-related protein 5 (SFRP5) is a recently discovered adipokine. It is involved in insulin res...Objective Obstructive sleep apnea (OSA) is closely related to obesity, insulin resistance and inflammation. Secreted frizzled-related protein 5 (SFRP5) is a recently discovered adipokine. It is involved in insulin resistance and inflammation in obesity. This study aimed at evaluating the association between SFRP5and sleeping characteristics as well as biochemical parameters of OSA patients.Methods This was a prospective case control study. Nondiabetic OSA patients and controls were consecutively recruited and divided into three groups: OSA group, apnea–hypopnea Index (AHI)≥5/h; healthy controls with normal body mass index (BMI); obese controls without OSA, and BMI > 24.0 kg/m2. All participants underwent polysomnography (PSG). Plasma SFRP5 was examined using enzyme-linked immunosorbent assay (ELISA). Blood biochemical examinations, including fasting blood glucose (FBG), lipid profile, hypersensitive Creactive protein (hsCRP), were performed early in the morning after PSG. Patients with severe OSA were treated with nasal continuous positive airway pressure (nCPAP), and plasma SFRP5 was repeatedly measured for comparison.Results Sixty-eight subjects were enrolled in the study, including 38 patients of OSA, whose medium AHI was 58.70 /h (36.63, 71.15), 20 obese controls, and 10 healthy controls. The plasma SFRP5 level of OSA patients was not significantly different from that of healthy controls or obese controls. In OSA patients, SFRP5 level correlated positively with triglyceride level (r=0.447, P=0.005) and negatively with LDL-cholesterol level and HDLcholesterol level (r=?0.472 and P=0.003; r=?0.478 and P=0.002; respectively). SFRP5 level was not found correlating with FBG, AHI, or any of nocturnal hypoxia parameters. After overnight nCPAP treatment, plasma SFRP5 levels of OSA patients did not change significantly (t=1.557, P = 0.148) compared to that of pretreatment.Conclusions In nondiabetic OSA patients, plasma SFRP5 is associated with the lipid profile. However,no correlation was observed between SFRP5 and FBG or sleep parameters. The SFRP5 level of OSA patients did not differ from that of non-OSA individuals in our study.展开更多
AIM： To investigate the functions of promoter hypermethylation of secreted frizzled-related proteins （sFRPs） genes in colorectal tumorigenesis and progression. METHODS： The promoter hypermethylation and expression...AIM： To investigate the functions of promoter hypermethylation of secreted frizzled-related proteins （sFRPs） genes in colorectal tumorigenesis and progression. METHODS： The promoter hypermethylation and expression of sFRP genes in 72 sporadic colorectal carcinomas, 33 adenomas, 18 aberrant crypt foci （ACF） and colorectal cancer cell lines RKO, HCT116 and SW480 were detected by methylation-specific PCR and reverse transcription PCR, respectively. RESULTS： None of the normal colorectal mucosa tissues showed methylated bands of any of four sFRP genes, sFRP1, 2, 4 and 5 were frequently methylated in colorectal carcinoma, adenoma and ACF （sFRP1 〉 85%, sFRP2 〉75%, sFRP5 〉 50%）, and the differences between three colorectal tissues were not significant （P 〉 0.05）. IVlethylation in colorectal tumors was more frequent than in normal mucosa and adjacent normal mucosa. The mRNA of sFRP1-5 genes was expressed in all normal colorectal mucosa samples. Expression of sFRP1, 2, 4 and 5 and sFRP1, 2 and 5 was downregulated in carcinoma and adenoma, respectively. The downregulation of sFRP2, 4 and 5 was more frequent in carcinoma than in adenoma. Expression of sFRP3 which promoter has no CpG island was downregulated in only a few of colorectal tumor samples （7/105）. The downregulation ofsFRP1, 2, 4 and 5 expression was significantly associated with promoter hypermethylation in colorectal tumor. After cells were treated by DAC/TSA combination, the silenced sFRP mRNA expression could be effectively re-expressed in colorectal cancer cell lines. CONCLUSION： Hypermethylation of sFRP genes is a common early event in the evolution of colorectal tumor, occurring frequently in ACF, which is regarded as the earliest lesion of multistage colorectal carcinogenesis. It appears to functionally silence sFRP genes expression. Methylation of sFRP1, 2 and 5 genes might serve as indicators for colorectal tumor.展开更多
AIM： To identify the methylation of secreted frizzled-related protein 1 （SFRP1） in gastric cancer and to investigate the aberrant expression of SFRP1 and its correlation with the clinical pathological features of p...AIM： To identify the methylation of secreted frizzled-related protein 1 （SFRP1） in gastric cancer and to investigate the aberrant expression of SFRP1 and its correlation with the clinical pathological features of patients. METHODS： We determined SFRP1 methylation and SFRP1 mRNA expression in 3 gastric cancer cell lines SGC-7901, BGC-823, HGC-27, from 52 primary gastric cancer specimens and matched tumor adjacent tissue specimens by methylation-specific （MSP） PCR and RT-PCR respectively. Fisher＇s exact test was used to analyze the statistical association between clinical pathological data and aberrant expression of SFRP1. RESULTS： In 3 cancer cell lines, BGC-823 and HGC-27 had methylated SFRP1 and lost SFRP1 mRNA expression. After treatment of BGC-823 and HGC-27 with the demethylating agent, 5-aza-2′-deoxycytidine, SFRP1 was re-expressed. In 52 primary gastric cancer specimens and matched tumor adjacent tissue specimens, hypermethylation of SFRP1 was detected in 23 （44%） and 8 （15%） specimens respectively （x^2= 10.34, P 〈 0.01）. Loss of SFRP1 expression was detected in 17（33%） and 6 （12%） specimens respectively （x^2= 6.75, P 〈 0.01）. There was a significant correlation between SFRP1 hypermethylation and SFRP1 expression loss. SFRP1 expression was also correlated significantly with tumor stage and lymph node status, but not with patient sex, age and histological type. CONCLUSION： SFRP1 inactivation is a common and early event caused mainly by hypermethylation in gastric cancer. SFRP1 expression loss may be correlated with tumor metastasis in primary gastric cancer.展开更多
目的分析胎儿超声心动图联合母体血清分泌型卷曲相关蛋白5(secreted frizzled-related protein 5,SFRP5)、同型半胱氨酸(homocysteine,Hcy)浓度对先天性心脏病(先心病)胎儿的诊断效能。方法选取2018年7月至2022年2月在十堰市妇幼保健院...目的分析胎儿超声心动图联合母体血清分泌型卷曲相关蛋白5(secreted frizzled-related protein 5,SFRP5)、同型半胱氨酸(homocysteine,Hcy)浓度对先天性心脏病(先心病)胎儿的诊断效能。方法选取2018年7月至2022年2月在十堰市妇幼保健院进行孕中期产前检查的孕妇2756例为研究对象,根据妊娠结局将孕妇分为先心病组(n=110),正常组(n=2646)。孕中期均行胎儿超声心动图检查。酶联免疫吸附法试验(enzymelinked immunosorbent assay,ELISA)检测母体血清SFRP5浓度,全自动生化分析仪检测Hcy浓度。Pearson法分析先心病组母体血清SFRP5浓度与Hcy浓度的相关性。以妊娠结局为“金标准”,分析胎儿超声心动图、母体血清SFRP5、Hcy浓度及三者联合对先心病胎儿的诊断效能。结果先心病组母体血清SFRP5浓度明显低于正常组(P<0.05),Hcy浓度明显高于正常组(P<0.05),两者浓度呈负相关(r=-0.575,P<0.05)。胎儿超声心动图、母体血清SFRP5、Hcy浓度诊断先天性心脏病胎儿的灵敏度分别为63.64%、64.55%、65.45%,特异度分别为81.52%、81.07%、80.35%,准确度分别为80.81%、80.41%、79.75%。胎儿超声心动图、母体血清SFRP5、Hcy浓度联合诊断先心病胎儿的灵敏度、准确度分别为96.36%、80.91%,均高于三者单独检测,且三者联合诊断的灵敏度显著高于三者单独诊断(P<0.05)。结论胎儿超声心动图联合母体血清SFRP5、Hcy浓度对先心病胎儿具有较高的诊断价值,三者联合诊断可提高灵敏度。展开更多
目的研究1型糖尿病患儿血清分泌型卷曲相关蛋白5(Secreted frizzled-related protein 5,SFRP5)的水平与糖脂代谢指标及和微血管并发症的关系。方法以2022年1月-2023年12月于山西省儿童医院就诊的96例1型糖尿病患儿为糖尿病组,选择同时...目的研究1型糖尿病患儿血清分泌型卷曲相关蛋白5(Secreted frizzled-related protein 5,SFRP5)的水平与糖脂代谢指标及和微血管并发症的关系。方法以2022年1月-2023年12月于山西省儿童医院就诊的96例1型糖尿病患儿为糖尿病组,选择同时期在本院接受健康体检的100名正常儿童作为健康组。分别测定两组血清SFRP5水平、空腹血糖(Fasting blood glucose,FBG)、总胆固醇(Total cholesterol,TC)、高密度脂蛋白胆固醇(High density lipoprotein cholesterol,HDL-C)、低密度脂蛋白胆固醇(Low density lipoprotein cholesterin,LDL-C)、三酰甘油(Triacylglycerol,TG)水平以及糖化血红蛋白(Glycosylated hemoglobin,HbA1c),对糖尿病组患儿是否患有微血管并发症进行评估。采用Pearson相关性分析评估血清SFRP5水平与糖脂代谢指标间的相关性。采用受试者工作特征(Receiver operating characteristic,ROC)曲线评估血清SFRP5水平对1型糖尿病合并微血管并发症的诊断效能。结果与健康组比较,糖尿病组FBG、HbA1c、LDL-C和TG水平升高,HDL-C水平降低,差异有统计学意义(P<0.05)。糖尿病组血清SFRP5水平为(352.53±53.69)pg/mL,低于健康组[(424.49±63.54)pg/mL],差异有统计学意义(t=5.453,P<0.05)。糖尿病组血清SFRP5水平与FBG、HbA1c和TG水平呈负相关关系(P<0.05)。1型糖尿病合并微血管并发症儿童的HbA1c和LDL-C水平高于未合并微血管并发症儿童,差异有统计学意义(P<0.05)。与未合并微血管并发症患儿血清SFRP5水平[(363.43±57.24)pg/mL]比较,1型糖尿病合并微血管并发症患儿血清SFRP5水平(315.87±42.35)pg/mL降低,差异有统计学意义(t=4.042,P<0.001)。血清SFRP5水平对1型糖尿病合并微血管并发症诊断效能的曲线下面积为0.838(0.755~0.921),灵敏度为86.4%,特异度为73.0%。结论1型糖尿病患儿血清SFRP5水平低于健康儿童,血清SFRP5水平与血清FBG、HbA1c和TG含量呈负相关,合并微血管并发症的糖尿病患儿血清SFRP5水平低于未合并者。展开更多
目的分析孕中期妊娠期糖尿病(GDM)患者血清α清蛋白(Afamin)和分泌型卷曲相关蛋白5(SFRP5)水平及临床价值。方法选取2019年8月至2021年8月河北省秦皇岛市海港医院120例定期产检并分娩的孕妇为研究对象,其中GDM孕妇50例为GDM组,非GDM孕...目的分析孕中期妊娠期糖尿病(GDM)患者血清α清蛋白(Afamin)和分泌型卷曲相关蛋白5(SFRP5)水平及临床价值。方法选取2019年8月至2021年8月河北省秦皇岛市海港医院120例定期产检并分娩的孕妇为研究对象,其中GDM孕妇50例为GDM组,非GDM孕妇70例为对照组。采用酶联免疫吸附试验(ELISA)检测两组血清Afamin和SFRP5水平;采用口服葡萄糖耐量试验(OGTT)检测OGTT 1 h血糖(1 h PG)、OGTT 2 h血糖(2 h PG);检测空腹血糖(FPG)、糖化血红蛋白(HbA1c)及空腹胰岛素(FINS)水平;分析Afamin、SFRP5与糖代谢指标之间的相关性;采用受试者工作特征(ROC)曲线评估Afamin、SFRP5单独及联合检测对GDM的诊断价值;分析不同Afamin、SFRP5水平孕妇不良妊娠结局发生情况。结果GDM组FPG、1 h PG、2 h PG、HbA1c和FINS水平明显高于对照组,差异有统计学意义(P<0.05);GDM组Afamin水平明显高于对照组,SFRP5水平明显低于对照组,差异有统计学意义(P<0.05);Afamin水平与FPG、1 h PG、2 h PG、HbA1c和FINS水平呈正相关(P<0.05);SFRP5水平与FPG、1 h PG、2 h PG、HbA1c和FINS水平呈负相关(P<0.05);ROC曲线分析结果显示,血清Afamin和SFRP5单独及联合检测诊断GDM的曲线下面积(AUC)分别为0.747、0.642、0.872,且联合检测的灵敏度为89.3%,特异度为77.9%,联合检测的AUC明显大于单独检测的AUC,差异有统计学意义(P<0.05)。以所有孕妇的Afamin、SFRP5水平均值为界,分为高Afamin组、低Afamin组,以及高SFRP5组、低SFRP5组,高Afamin组母婴不良妊娠结局发生率高于低Af amin组,低SFRP5组母婴不良妊娠结局发生率高于高SFRP5组,差异有统计学意义(P<0.05)。结论Afamin和SFRP5作为诊断GDM的生物标志物具有良好的效能,在临床上可以预测GDM的发展趋势和不良妊娠结局的风险。展开更多
基金supported by the Natural Science Research Project of colleges and Universities in Anhui Province[2022AH052336]High Level Talent Research Initiation Fund Of Anhui Medical College[2023RC004]。
文摘Objective Microcystin-leucine-arginine(MC-LR)exposure induces lipid metabolism disorders in the liver.Secreted frizzled-related protein 5(SFRP5)is a natural antagonist of winglesstype MMTV integration site family,member 5A(Wnt5a)and an anti-inflammatory adipocytokine.In this study,we aimed to investigate whether MC-LR can induce lipid metabolism disorders in hepatocytes and whether SFRP5,which has anti-inflammatory effects,can alleviate the effects of hepatic lipid metabolism by inhibiting the Wnt5a/Jun N-terminal kinase(JNK)pathway.Methods We exposed mice to MC-LR in vivo to induce liver lipid metabolism disorders.Subsequently,mouse hepatocytes that overexpressed SFRP5 or did not express SFRP5 were exposed to MC-LR,and the effects of SFRP5 overexpression on inflammation and Wnt5a/JNK activation by MC-LR were observed.Results MC-LR exposure induced liver lipid metabolism disorders in mice and significantly decreased SFRP5 mRNA and protein levels in a concentration-dependent manner.SFRP5 overexpression in AML12cells suppressed MC-LR-induced inflammation.Overexpression of SFRP5 also inhibited Wnt5a and phosphorylation of JNK.Conclusion MC-LR can induce lipid metabolism disorders in mice,and SFRP5 can attenuate lipid metabolism disorders in the mouse liver by inhibiting Wnt5a/JNK signaling.
文摘Objective Obstructive sleep apnea (OSA) is closely related to obesity, insulin resistance and inflammation. Secreted frizzled-related protein 5 (SFRP5) is a recently discovered adipokine. It is involved in insulin resistance and inflammation in obesity. This study aimed at evaluating the association between SFRP5and sleeping characteristics as well as biochemical parameters of OSA patients.Methods This was a prospective case control study. Nondiabetic OSA patients and controls were consecutively recruited and divided into three groups: OSA group, apnea–hypopnea Index (AHI)≥5/h; healthy controls with normal body mass index (BMI); obese controls without OSA, and BMI > 24.0 kg/m2. All participants underwent polysomnography (PSG). Plasma SFRP5 was examined using enzyme-linked immunosorbent assay (ELISA). Blood biochemical examinations, including fasting blood glucose (FBG), lipid profile, hypersensitive Creactive protein (hsCRP), were performed early in the morning after PSG. Patients with severe OSA were treated with nasal continuous positive airway pressure (nCPAP), and plasma SFRP5 was repeatedly measured for comparison.Results Sixty-eight subjects were enrolled in the study, including 38 patients of OSA, whose medium AHI was 58.70 /h (36.63, 71.15), 20 obese controls, and 10 healthy controls. The plasma SFRP5 level of OSA patients was not significantly different from that of healthy controls or obese controls. In OSA patients, SFRP5 level correlated positively with triglyceride level (r=0.447, P=0.005) and negatively with LDL-cholesterol level and HDLcholesterol level (r=?0.472 and P=0.003; r=?0.478 and P=0.002; respectively). SFRP5 level was not found correlating with FBG, AHI, or any of nocturnal hypoxia parameters. After overnight nCPAP treatment, plasma SFRP5 levels of OSA patients did not change significantly (t=1.557, P = 0.148) compared to that of pretreatment.Conclusions In nondiabetic OSA patients, plasma SFRP5 is associated with the lipid profile. However,no correlation was observed between SFRP5 and FBG or sleep parameters. The SFRP5 level of OSA patients did not differ from that of non-OSA individuals in our study.
基金Supported by the Special-purpose Scientific Research Foundation for University Doctorate Project of the Ministry of Education of China, No. 301090255
文摘AIM： To investigate the functions of promoter hypermethylation of secreted frizzled-related proteins （sFRPs） genes in colorectal tumorigenesis and progression. METHODS： The promoter hypermethylation and expression of sFRP genes in 72 sporadic colorectal carcinomas, 33 adenomas, 18 aberrant crypt foci （ACF） and colorectal cancer cell lines RKO, HCT116 and SW480 were detected by methylation-specific PCR and reverse transcription PCR, respectively. RESULTS： None of the normal colorectal mucosa tissues showed methylated bands of any of four sFRP genes, sFRP1, 2, 4 and 5 were frequently methylated in colorectal carcinoma, adenoma and ACF （sFRP1 〉 85%, sFRP2 〉75%, sFRP5 〉 50%）, and the differences between three colorectal tissues were not significant （P 〉 0.05）. IVlethylation in colorectal tumors was more frequent than in normal mucosa and adjacent normal mucosa. The mRNA of sFRP1-5 genes was expressed in all normal colorectal mucosa samples. Expression of sFRP1, 2, 4 and 5 and sFRP1, 2 and 5 was downregulated in carcinoma and adenoma, respectively. The downregulation of sFRP2, 4 and 5 was more frequent in carcinoma than in adenoma. Expression of sFRP3 which promoter has no CpG island was downregulated in only a few of colorectal tumor samples （7/105）. The downregulation ofsFRP1, 2, 4 and 5 expression was significantly associated with promoter hypermethylation in colorectal tumor. After cells were treated by DAC/TSA combination, the silenced sFRP mRNA expression could be effectively re-expressed in colorectal cancer cell lines. CONCLUSION： Hypermethylation of sFRP genes is a common early event in the evolution of colorectal tumor, occurring frequently in ACF, which is regarded as the earliest lesion of multistage colorectal carcinogenesis. It appears to functionally silence sFRP genes expression. Methylation of sFRP1, 2 and 5 genes might serve as indicators for colorectal tumor.
基金Supported by Liaoning Education Divison Foundation, No.05L557
文摘AIM： To identify the methylation of secreted frizzled-related protein 1 （SFRP1） in gastric cancer and to investigate the aberrant expression of SFRP1 and its correlation with the clinical pathological features of patients. METHODS： We determined SFRP1 methylation and SFRP1 mRNA expression in 3 gastric cancer cell lines SGC-7901, BGC-823, HGC-27, from 52 primary gastric cancer specimens and matched tumor adjacent tissue specimens by methylation-specific （MSP） PCR and RT-PCR respectively. Fisher＇s exact test was used to analyze the statistical association between clinical pathological data and aberrant expression of SFRP1. RESULTS： In 3 cancer cell lines, BGC-823 and HGC-27 had methylated SFRP1 and lost SFRP1 mRNA expression. After treatment of BGC-823 and HGC-27 with the demethylating agent, 5-aza-2′-deoxycytidine, SFRP1 was re-expressed. In 52 primary gastric cancer specimens and matched tumor adjacent tissue specimens, hypermethylation of SFRP1 was detected in 23 （44%） and 8 （15%） specimens respectively （x^2= 10.34, P 〈 0.01）. Loss of SFRP1 expression was detected in 17（33%） and 6 （12%） specimens respectively （x^2= 6.75, P 〈 0.01）. There was a significant correlation between SFRP1 hypermethylation and SFRP1 expression loss. SFRP1 expression was also correlated significantly with tumor stage and lymph node status, but not with patient sex, age and histological type. CONCLUSION： SFRP1 inactivation is a common and early event caused mainly by hypermethylation in gastric cancer. SFRP1 expression loss may be correlated with tumor metastasis in primary gastric cancer.
文摘目的分析孕中期妊娠期糖尿病(GDM)患者血清α清蛋白(Afamin)和分泌型卷曲相关蛋白5(SFRP5)水平及临床价值。方法选取2019年8月至2021年8月河北省秦皇岛市海港医院120例定期产检并分娩的孕妇为研究对象,其中GDM孕妇50例为GDM组,非GDM孕妇70例为对照组。采用酶联免疫吸附试验(ELISA)检测两组血清Afamin和SFRP5水平;采用口服葡萄糖耐量试验(OGTT)检测OGTT 1 h血糖(1 h PG)、OGTT 2 h血糖(2 h PG);检测空腹血糖(FPG)、糖化血红蛋白(HbA1c)及空腹胰岛素(FINS)水平;分析Afamin、SFRP5与糖代谢指标之间的相关性;采用受试者工作特征(ROC)曲线评估Afamin、SFRP5单独及联合检测对GDM的诊断价值;分析不同Afamin、SFRP5水平孕妇不良妊娠结局发生情况。结果GDM组FPG、1 h PG、2 h PG、HbA1c和FINS水平明显高于对照组,差异有统计学意义(P<0.05);GDM组Afamin水平明显高于对照组,SFRP5水平明显低于对照组,差异有统计学意义(P<0.05);Afamin水平与FPG、1 h PG、2 h PG、HbA1c和FINS水平呈正相关(P<0.05);SFRP5水平与FPG、1 h PG、2 h PG、HbA1c和FINS水平呈负相关(P<0.05);ROC曲线分析结果显示,血清Afamin和SFRP5单独及联合检测诊断GDM的曲线下面积(AUC)分别为0.747、0.642、0.872,且联合检测的灵敏度为89.3%,特异度为77.9%,联合检测的AUC明显大于单独检测的AUC,差异有统计学意义(P<0.05)。以所有孕妇的Afamin、SFRP5水平均值为界,分为高Afamin组、低Afamin组,以及高SFRP5组、低SFRP5组,高Afamin组母婴不良妊娠结局发生率高于低Af amin组,低SFRP5组母婴不良妊娠结局发生率高于高SFRP5组,差异有统计学意义(P<0.05)。结论Afamin和SFRP5作为诊断GDM的生物标志物具有良好的效能,在临床上可以预测GDM的发展趋势和不良妊娠结局的风险。
