Aim:To study the protein changes of spermatozoa associated with sperm motility during sperm cryopreservation and its mechanism.Methods:In 18 healthy men,the seminal sperm motility and HSP90 levels were studied before ...Aim:To study the protein changes of spermatozoa associated with sperm motility during sperm cryopreservation and its mechanism.Methods:In 18 healthy men,the seminal sperm motility and HSP90 levels were studied before and after cryopreservation using SDS-PAGE,Western blotting and computerized image analysis.Results:The sperm motility declined significantly after cryopreservation(P<0.01).The average grey level and the integrated grey level of sperm HSP90 before cooling were 34.1±3.2 and 243.0±21.6,respectively,while those after thawing were 23.2±2.5 and 105.7±28.5,respectively.Both parameters were decreased significantly(P<0.01).No HSP90 was found in the seminal plasma before and after cryopreservation.Conclusion:HSP90 in human spermatozoa was decreased substantially after cryopreservation.This may results from protein degradation,rather than leakage into the seminal plasma.展开更多
AIM: To address the effect of heat-shock protein 90(HSP90) inhibitors on the release of the hepatitis C virus(HCV), a cell culture-derived HCV(JFH1/HCVcc) from Huh-7 cells was examined.METHODS: We quantified both the ...AIM: To address the effect of heat-shock protein 90(HSP90) inhibitors on the release of the hepatitis C virus(HCV), a cell culture-derived HCV(JFH1/HCVcc) from Huh-7 cells was examined.METHODS: We quantified both the intracellular and extracellular(culture medium) levels of the components(RNA and core) of JFH-1/HCVcc. The intracellular HCV RNA and core levels were determined after the JFH1/HCVcc-infected Huh-7 cells were treated with radicicol for 36 h. The extracellular HCV RNA and core protein levels were determined from the medium of the last 24 h of radicicol treatment. To determine the possible role of the HSP90 inhibitor in HCV release, we examined the effect of a combined application of low doses of the HSP90 inhibitor radicicol and the RNA replication inhibitors cyclosporin A(Cs A) or interferon. Finally, we statistically examined the combined effect of radicicoland Cs A using the combination index(CI) and graphical representation proposed by Chou and Talalay.RESULTS: We found that the HSP90 inhibitors had greater inhibitory effects on the HCV RNA and core protein levels measured in the medium than inside the cells. This inhibitory effect was observed in the presence of a low level of a known RNA replication inhibitor(Cs A or interferon-α). Treating the cells with a combination of radicicol and cyclosporin A for 24 h resulted in significant synergy(CI < 1) that affected the release of both the viral RNA and the core protein. CONCLUSION: In addition to having an inhibitory effect on RNA replication, HSP90 inhibitors may interfere with an HCV replication step that occurs after the synthesis of viral RNA, such as assembly and release.展开更多
Researches on Candidal heat-shock protein 90 (HSP90) in recent years are summarized. Candida albicans is a commensal pathogen in human and animals. in immunocompromised individuals it behaves as an opportunist pathoge...Researches on Candidal heat-shock protein 90 (HSP90) in recent years are summarized. Candida albicans is a commensal pathogen in human and animals. in immunocompromised individuals it behaves as an opportunist pathogen, giving rise to superficial or systemic infections. Systemic candidosis is a common cause of death among immunocompromised and debilitated patients, in which the mortality is as high as 70%. HSP90 is now recognized as an immunodominant antigen in C. albicans and plays a key role in systemic candidosis as a molecular chaperone. The 47-ku peptide is the breakdown product of HSP90. Patients who has recovered from systemic candidosis produce high titre of antibodies to 47-ku antigen, whereas the fatal cases have little antibody or falling titre? The three commonest epitopes of candidal HSP90 have been mapped, epitopes C, B and H. Epitopes C and H are immunogenic. The antibody probes of both epitopes may be developed into a new serological test agents for systemic candidosis due to rather展开更多
为探究杜鹃花热激蛋白90(heat shock protein 90,Hsp90)在植物生长发育调节和高温胁迫响应中的作用,本研究以杜鹃花属中观赏价值高、环境适应性强的马银花(Rhododendron ovatum)为材料,利用生物信息学方法对其Hsp90家族开展全基因组水...为探究杜鹃花热激蛋白90(heat shock protein 90,Hsp90)在植物生长发育调节和高温胁迫响应中的作用,本研究以杜鹃花属中观赏价值高、环境适应性强的马银花(Rhododendron ovatum)为材料,利用生物信息学方法对其Hsp90家族开展全基因组水平鉴定以及基因结构、顺式作用元件、进化、表达模式等分析。结果表明马银花Hsp90家族有11个成员,分布在5条染色体上。启动子区顺式作用元件分析表明,Hsp90家族成员均参与植物激素代谢和逆境胁迫响应过程。利用马银花、拟南芥、番茄、茶、杜鹃、河南杜鹃、马缨杜鹃的Hsp90家族构建的系统进化树可被划分为4个主要分支。进化分析显示,Hsp90家族在杜鹃花属分化过程中受到纯化选择作用。Hsp90家族在不同组织器官中和高温处理下的表达模式表明,马银花Hsp90家族参与了花器官的发育和植物对高温胁迫的响应。本研究为杜鹃花Hsp90基因功能的深入解析奠定了基础。展开更多
Previous studies have confirmed that heat shock protein 90 overexpression can lead to dopaminergic neuronal death. This study was designed to further investigate what effects are produced by heat shock protein 90 afte...Previous studies have confirmed that heat shock protein 90 overexpression can lead to dopaminergic neuronal death. This study was designed to further investigate what effects are produced by heat shock protein 90 after endurance exercise training. Immunohistochemistry results showed that exercise training significantly inhibited heat shock protein 90 overexpression in the soleus and gastrocnemius in Parkinson's disease rats, which is a potential therapeutic target for ameliorating skeletal muscle abnormalities in Parkinson's disease.展开更多
Heat shock protein (HSP) is a kind of protein that mainly acts as a molecular chaperone to participate in the synthesis and folding of proteins, maintain the spatial conformation of proteins and protect cells from dam...Heat shock protein (HSP) is a kind of protein that mainly acts as a molecular chaperone to participate in the synthesis and folding of proteins, maintain the spatial conformation of proteins and protect cells from damage and other important biological functions. HSP90 plays an important role in maintaining molecular chaperone structure, regulating cell cycle and apoptosis, coordinating hormone signal transduction and promoting wound healing. And HSP90 also plays an important role in the occurrence and progression of tumors. In recent years, HSP90 inhibitors have made some achievements in molecular targeted therapy for malignant tumors, but further research is needed in clinical application. In this paper, the research status of the relationship between hepatocellular carcinoma targeted by heat shock protein 90 was reviewed.展开更多
<strong>Objective:</strong> To explore the relationship between heat shock protein-90<i>α</i> (HSP-90<i>α</i>) and occurrence of prostate cancer, and clinical value of combined de...<strong>Objective:</strong> To explore the relationship between heat shock protein-90<i>α</i> (HSP-90<i>α</i>) and occurrence of prostate cancer, and clinical value of combined detection of serum HSP-90<i>α</i> and prostate specific antigen (PSA) in the diagnosis of prostate cancer. <strong>Method:</strong> A total of 30 patients with prostate cancer, 30 patients with benign prostatic hyperplasia (BPH) and 30 healthy men (control group) were selected from September 2018 to September 2019, then to detect levels of serum HSP-90<i>α</i>, total PSA and free PSA (FPSA) by ELISA, serum testosterone level by radioimmunoassay, prostate cancer tissue was removed by operation, and relative expression of tissue HSP-90<i>α</i> protein by Western blot. <strong>Results:</strong> The levels of serum HSP-90<i>α</i> and total PSA in prostate cancer group were significantly higher than other two groups, and testosterone level was lower than other two groups (P < 0.05);there was no difference of serum FPSA level between the three groups (P > 0.05). It was found by Pearson test that serum HSP-90<i>α</i> was positively correlated with total PSA level (r = 0.659, P = 0.005), while negatively correlated with testosterone level (r = -0.549, P = 0.006). According to TNM stage of prostate cancer, there were 17 cases of stage I - II, 13 cases of stage III - IV, 6 cases of Gleason score 1 - 4, 13 cases of 5 - 7, 11 cases of 8 - 10, tumor diameter range from 0.8 to 6.2 cm, with average of (3.9 ± 1.5) cm. The relative expression of HSP-90<i>α</i> protein in tumor tissue was closely related to TNM stage, Gleason score and tumor diameter (P < 0.05). By ROC analysis, it was found that accuracy of combined detection of serum HSP-90<i>α</i> and PSA levels for prostate cancer diagnosis was 0.896, and that of single PSA detection was 0.852. <strong>Conclusion:</strong> Higher expressions of HSP-90<i>α</i> in prostate cancer tissue and serum may be closely related to occurrence and development of prostate cancer, and combined detections of serum HSP-90<i>α</i> and PSA levels are of great significance in improving early diagnosis of prostate cancer.展开更多
文摘Aim:To study the protein changes of spermatozoa associated with sperm motility during sperm cryopreservation and its mechanism.Methods:In 18 healthy men,the seminal sperm motility and HSP90 levels were studied before and after cryopreservation using SDS-PAGE,Western blotting and computerized image analysis.Results:The sperm motility declined significantly after cryopreservation(P<0.01).The average grey level and the integrated grey level of sperm HSP90 before cooling were 34.1±3.2 and 243.0±21.6,respectively,while those after thawing were 23.2±2.5 and 105.7±28.5,respectively.Both parameters were decreased significantly(P<0.01).No HSP90 was found in the seminal plasma before and after cryopreservation.Conclusion:HSP90 in human spermatozoa was decreased substantially after cryopreservation.This may results from protein degradation,rather than leakage into the seminal plasma.
文摘AIM: To address the effect of heat-shock protein 90(HSP90) inhibitors on the release of the hepatitis C virus(HCV), a cell culture-derived HCV(JFH1/HCVcc) from Huh-7 cells was examined.METHODS: We quantified both the intracellular and extracellular(culture medium) levels of the components(RNA and core) of JFH-1/HCVcc. The intracellular HCV RNA and core levels were determined after the JFH1/HCVcc-infected Huh-7 cells were treated with radicicol for 36 h. The extracellular HCV RNA and core protein levels were determined from the medium of the last 24 h of radicicol treatment. To determine the possible role of the HSP90 inhibitor in HCV release, we examined the effect of a combined application of low doses of the HSP90 inhibitor radicicol and the RNA replication inhibitors cyclosporin A(Cs A) or interferon. Finally, we statistically examined the combined effect of radicicoland Cs A using the combination index(CI) and graphical representation proposed by Chou and Talalay.RESULTS: We found that the HSP90 inhibitors had greater inhibitory effects on the HCV RNA and core protein levels measured in the medium than inside the cells. This inhibitory effect was observed in the presence of a low level of a known RNA replication inhibitor(Cs A or interferon-α). Treating the cells with a combination of radicicol and cyclosporin A for 24 h resulted in significant synergy(CI < 1) that affected the release of both the viral RNA and the core protein. CONCLUSION: In addition to having an inhibitory effect on RNA replication, HSP90 inhibitors may interfere with an HCV replication step that occurs after the synthesis of viral RNA, such as assembly and release.
文摘Researches on Candidal heat-shock protein 90 (HSP90) in recent years are summarized. Candida albicans is a commensal pathogen in human and animals. in immunocompromised individuals it behaves as an opportunist pathogen, giving rise to superficial or systemic infections. Systemic candidosis is a common cause of death among immunocompromised and debilitated patients, in which the mortality is as high as 70%. HSP90 is now recognized as an immunodominant antigen in C. albicans and plays a key role in systemic candidosis as a molecular chaperone. The 47-ku peptide is the breakdown product of HSP90. Patients who has recovered from systemic candidosis produce high titre of antibodies to 47-ku antigen, whereas the fatal cases have little antibody or falling titre? The three commonest epitopes of candidal HSP90 have been mapped, epitopes C, B and H. Epitopes C and H are immunogenic. The antibody probes of both epitopes may be developed into a new serological test agents for systemic candidosis due to rather
文摘为探究杜鹃花热激蛋白90(heat shock protein 90,Hsp90)在植物生长发育调节和高温胁迫响应中的作用,本研究以杜鹃花属中观赏价值高、环境适应性强的马银花(Rhododendron ovatum)为材料,利用生物信息学方法对其Hsp90家族开展全基因组水平鉴定以及基因结构、顺式作用元件、进化、表达模式等分析。结果表明马银花Hsp90家族有11个成员,分布在5条染色体上。启动子区顺式作用元件分析表明,Hsp90家族成员均参与植物激素代谢和逆境胁迫响应过程。利用马银花、拟南芥、番茄、茶、杜鹃、河南杜鹃、马缨杜鹃的Hsp90家族构建的系统进化树可被划分为4个主要分支。进化分析显示,Hsp90家族在杜鹃花属分化过程中受到纯化选择作用。Hsp90家族在不同组织器官中和高温处理下的表达模式表明,马银花Hsp90家族参与了花器官的发育和植物对高温胁迫的响应。本研究为杜鹃花Hsp90基因功能的深入解析奠定了基础。
基金financially supported by the Deanship of Research at Jordan University of Science and Technology,Irbid,Jordan
文摘Previous studies have confirmed that heat shock protein 90 overexpression can lead to dopaminergic neuronal death. This study was designed to further investigate what effects are produced by heat shock protein 90 after endurance exercise training. Immunohistochemistry results showed that exercise training significantly inhibited heat shock protein 90 overexpression in the soleus and gastrocnemius in Parkinson's disease rats, which is a potential therapeutic target for ameliorating skeletal muscle abnormalities in Parkinson's disease.
文摘Heat shock protein (HSP) is a kind of protein that mainly acts as a molecular chaperone to participate in the synthesis and folding of proteins, maintain the spatial conformation of proteins and protect cells from damage and other important biological functions. HSP90 plays an important role in maintaining molecular chaperone structure, regulating cell cycle and apoptosis, coordinating hormone signal transduction and promoting wound healing. And HSP90 also plays an important role in the occurrence and progression of tumors. In recent years, HSP90 inhibitors have made some achievements in molecular targeted therapy for malignant tumors, but further research is needed in clinical application. In this paper, the research status of the relationship between hepatocellular carcinoma targeted by heat shock protein 90 was reviewed.
文摘<strong>Objective:</strong> To explore the relationship between heat shock protein-90<i>α</i> (HSP-90<i>α</i>) and occurrence of prostate cancer, and clinical value of combined detection of serum HSP-90<i>α</i> and prostate specific antigen (PSA) in the diagnosis of prostate cancer. <strong>Method:</strong> A total of 30 patients with prostate cancer, 30 patients with benign prostatic hyperplasia (BPH) and 30 healthy men (control group) were selected from September 2018 to September 2019, then to detect levels of serum HSP-90<i>α</i>, total PSA and free PSA (FPSA) by ELISA, serum testosterone level by radioimmunoassay, prostate cancer tissue was removed by operation, and relative expression of tissue HSP-90<i>α</i> protein by Western blot. <strong>Results:</strong> The levels of serum HSP-90<i>α</i> and total PSA in prostate cancer group were significantly higher than other two groups, and testosterone level was lower than other two groups (P < 0.05);there was no difference of serum FPSA level between the three groups (P > 0.05). It was found by Pearson test that serum HSP-90<i>α</i> was positively correlated with total PSA level (r = 0.659, P = 0.005), while negatively correlated with testosterone level (r = -0.549, P = 0.006). According to TNM stage of prostate cancer, there were 17 cases of stage I - II, 13 cases of stage III - IV, 6 cases of Gleason score 1 - 4, 13 cases of 5 - 7, 11 cases of 8 - 10, tumor diameter range from 0.8 to 6.2 cm, with average of (3.9 ± 1.5) cm. The relative expression of HSP-90<i>α</i> protein in tumor tissue was closely related to TNM stage, Gleason score and tumor diameter (P < 0.05). By ROC analysis, it was found that accuracy of combined detection of serum HSP-90<i>α</i> and PSA levels for prostate cancer diagnosis was 0.896, and that of single PSA detection was 0.852. <strong>Conclusion:</strong> Higher expressions of HSP-90<i>α</i> in prostate cancer tissue and serum may be closely related to occurrence and development of prostate cancer, and combined detections of serum HSP-90<i>α</i> and PSA levels are of great significance in improving early diagnosis of prostate cancer.
