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Koper-Lenkiewicz OM, Milewska AJ, Kamińska J, Sawicki K, Chrzanowski R, Zińczuk J, Reszeć J, Tylicka M, Matuszczak E, Matowicka-Karna J, Mariak Z, Mucha MW, Pawlak R, Dymicka-Piekarska V. Myelin-associated proteins are potential diagnostic markers in patients with primary brain tumour. Ann Med 2021; 53:1710-1721. [PMID: 34601991 PMCID: PMC8491661 DOI: 10.1080/07853890.2021.1983205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 09/13/2021] [Indexed: 11/30/2022] Open
Abstract
INTRODUCTION Taking into account the possibility of myelin-associated proteins having a role in brain tumour development, the study aimed to evaluate the diagnostic usefulness of myelin-associated proteins (Nogo-A, MAG, OMgp) released into extracellular space in patients with brain tumours. PATIENTS AND METHODS Protein concentration in primary brain tumour (n = 49) and non-tumoural subjects (n = 24) was measured in cerebrospinal fluid (CSF) and serum by means of ELISA. Immunohistochemistry for IDH1-R132H was done on 5-μm thick formalin-fixed, paraffin-embedded tumour sections with the use of an antibody specific for the mutant IDH1-R132H protein. RESULTS The receiver operator characteristic curve analysis showed that CSF Nogo-A and serum MAG were useful in differentiating patients with primary brain tumour from non-tumoural individuals. This was also true in the case of the separate analysis of the astrocytic tumour versus non-tumoural groups and the meningeal tumour versus non-tumoural groups. Neither Nogo-A nor MAG or OMgp concentrations were significantly different, in serum or CSF, between IDH1 wild-type astrocytic brain tumour patients compared to IDH1 mutant patients. CONCLUSIONS Our results indicated the potential usefulness of CSF Nogo-A and serum MAG evaluation as circulating biomarkers of primary brain tumours. Because blood is relatively easy to obtain, future research should be conducted to explicitly indicate the value of serum MAG concentration evaluation as a brain tumour biomarker.Key messagesMyelin-associated proteins may be circulating brain tumour biomarkers.Nogo-A and MAG proteins seem to be the most useful in brain tumour diagnosis.Decreased CSF Nogo-A concentration is an adverse prognostic factor for patients' survival.
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Affiliation(s)
- Olga M. Koper-Lenkiewicz
- Department of Clinical Laboratory Diagnostics, Medical University of Bialystok, Białystok, Poland
| | - Anna J. Milewska
- Department of Statistics and Medical Informatics, Medical University of Bialystok, Białystok, Poland
| | - Joanna Kamińska
- Department of Clinical Laboratory Diagnostics, Medical University of Bialystok, Białystok, Poland
| | - Karol Sawicki
- Department of Neurosurgery, Medical University of Bialystok, Białystok, Poland
| | - Robert Chrzanowski
- Department of Neurosurgery, Medical University of Bialystok, Białystok, Poland
| | - Justyna Zińczuk
- Department of Clinical Laboratory Diagnostics, Medical University of Bialystok, Białystok, Poland
| | - Joanna Reszeć
- Department of Medical Pathomorphology, Medical University of Bialystok, Białystok, Poland
| | - Marzena Tylicka
- Department of Biophysics, Medical University of Białystok, Białystok, Poland
| | - Ewa Matuszczak
- Department of Pediatric Surgery, Medical University of Białystok, Białystok, Poland
| | - Joanna Matowicka-Karna
- Department of Clinical Laboratory Diagnostics, Medical University of Bialystok, Białystok, Poland
| | - Zenon Mariak
- Department of Neurosurgery, Medical University of Bialystok, Białystok, Poland
| | - Mariusz W. Mucha
- Institute of Biomedical and Clinical Science, Hatherly Laboratories, University of Exeter Medical School, Exeter, UK
| | - Robert Pawlak
- Institute of Biomedical and Clinical Science, Hatherly Laboratories, University of Exeter Medical School, Exeter, UK
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Gelman S, Salteniene V, Pranculis A, Skieceviciene J, Zykus R, Petrauskas D, Kupcinskas L, Canbay A, Link A, Kupcinskas J. Plasma Nogo-A and placental growth factor levels are associated with portal hypertension in patients with liver cirrhosis. World J Gastroenterol 2019; 25:2935-2946. [PMID: 31249451 PMCID: PMC6589742 DOI: 10.3748/wjg.v25.i23.2935] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 04/18/2019] [Accepted: 04/29/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Clinically significant portal hypertension (CSPH) and severe portal hypertension (SPH) increase the risk for decompensation and life-threatening complications in liver cirrhosis. Pathologic angiogenesis might contribute to the formation of these conditions. Placental growth factor (PlGF) and Nogo-A protein are biomarkers of pathological angiogenesis, but data on their role in liver cirrhosis and portal hypertension is scarce.
AIM To determine plasma levels of PlGF and Nogo-A in patients with liver cirrhosis, CSPH, SPH and potential to predict portal hypertension.
METHODS A cohort of 122 patients with hepatitis C virus and/or alcohol-induced liver cirrhosis with characterized hepatic venous pressure gradient (HVPG) were included in the study. Demographic data, medical history, Child-Turcotte-Pugh and Model of End Stage liver disease score, clinical chemistry, liver stiffness values were recorded on the day of the procedure prior HVPG measurement. The degree of portal hypertension was determined by the invasive HVPG measurement. Nogo-A and PlGF plasma levels were evaluated using enzyme linked immunosorbent assay. The control group consisted of 30 healthy age- and sex- matched individuals.
RESULTS Peripheral PlGF levels were higher and Nogo-A levels were lower in patients with liver cirrhosis (23.20 vs 9.85; P < 0.0001 and 2.19 vs 3.12; P = 0.004 respectively). There was a positive linear correlation between peripheral levels of PlGF and HVPG (r = 0.338, P = 0.001) and negative linear correlation between the peripheral Nogo-A levels and HVPG (r = -0.267, P = 0.007). PlGF levels were higher in CSPH and SPH (P = 0.006; P < 0.0001) whereas Nogo-A levels were lower (P = 0.01; P < 0.033). Area under the curve for the diagnosis of CSPH for PlGF was 0.68 (P = 0.003) and for Nogo-A - 0.67 (P = 0.01); for SPH 0.714 (P < 0.0001) and 0.65 (P = 0.014) respectively. PlGF levels were higher and Nogo-A levels were lower in patients with esophageal varices (P < 0.05). PlGF cut-off value of 25 pg/mL distinguished patients with CSPH at 55.7% sensitivity and 76.7% specificity; whereas Nogo-A cut-off value of 1.12 ng/mL was highly specific (93.1%) for the diagnosis of CSPH.
CONCLUSION Plasma PlGF levels were higher while Nogo-A levels were lower in patients with liver cirrhosis and portal hypertension. Biomarkers showed moderate predictive value in determining CSPH and SPH.
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Affiliation(s)
- Sigita Gelman
- Department of Gastroenterology, Medical Academy, Lithuanian University of Health Sciences, Kaunas 44307, Lithuania
| | - Violeta Salteniene
- Institute for Digestive Research, Medical Academy, Lithuanian University of Health Sciences, Kaunas 44307, Lithuania
| | - Andrius Pranculis
- Department of Radiology, Medical Academy, Lithuanian University of Health Sciences, Kaunas 44307, Lithuania
| | - Jurgita Skieceviciene
- Institute for Digestive Research, Medical Academy, Lithuanian University of Health Sciences, Kaunas 44307, Lithuania
| | - Romanas Zykus
- Department of Gastroenterology, Medical Academy, Lithuanian University of Health Sciences, Kaunas 44307, Lithuania
| | - Dalius Petrauskas
- Department of Gastroenterology, Medical Academy, Lithuanian University of Health Sciences, Kaunas 44307, Lithuania
| | - Limas Kupcinskas
- Institute for Digestive Research and Department of Gastroenterology, Medical Academy, Lithuanian University of Health Sciences, Kaunas 44307, Lithuania
| | - Ali Canbay
- Department of Gastroenterology, Hepatology and Infectious Diseases Otto-von-Guericke University, Magdeburg 39106, Germany
| | - Alexander Link
- Department of Gastroenterology, Hepatology and Infectious Diseases Otto-von-Guericke University, Magdeburg 39106, Germany
| | - Juozas Kupcinskas
- Institute for Digestive Research and Department of Gastroenterology, Medical Academy, Lithuanian University of Health Sciences, Kaunas 44307, Lithuania
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Wang L, Shao Z, Chen S, Shi L, Li Z. A SLC24A2 Gene Variant Uncovered in Pancreatic Ductal Adenocarcinoma by Whole Exome Sequencing. TOHOKU J EXP MED 2018; 241:287-295. [PMID: 28413183 DOI: 10.1620/tjem.241.287] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) presents as an aggressive malignancy caused by environmental and genetic factors. In order to identify causal genes for PDAC, we performed whole exome sequencing (WES) to detect gene mutations in seven pairs of PDAC tissue and adjacent non-tumor tissue samples. Finally, we found a new nonsynonymous single nucleotide variant (nsSNV) in solute carrier 24 family member 2 (SLC24A2) gene resulting in the substitution of native glutamic acid (E) into aspartic acid (D) at position of 287 amino acid (E287D) in SLC24A2 protein, and confirmed this variant by Sanger gene sequencing. SLC24A2 is a potassium-dependent sodium-calcium exchanger and can transport metal ion across cell membrane. Multiple in silico variants' effects analyses methods including SIFT, PolyPhen, PROVEAN, and PANTHER demonstrated this variant had probably damaging effects, which was consistent with the results obtained from Mutation Taster software analysis with a probability of 0.99999997 to be "disease causing." The three dimension (3D) structure analysis results suggested this variant had little effects on the solubility and hydrophobicity of the protein; but it could decrease the protein stability by increasing the total protein structure energy (-8874.33 kJ/mol for the mutant and -8963.54 kJ/mol for the native) and by causing the mutant protein decreasing three stabilizing residues. Less stability of the mutant 287D protein than the native E287 protein was also supported by I-Mutant and Western-blotting analysis results. Overall, a new mutation in SLC24A2 gene was identified to decrease the stability of SLC24A2, which may have potential clinical usages.
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Affiliation(s)
- Lei Wang
- Digestive Endoscopy Center, Department of Gastroenterology, Changhai Hospital, Second Military Medical University
| | - Zhuo Shao
- Department of General Surgery, Changhai Hospital, Second Military Medical University
| | - Shiyue Chen
- Department of Radiology, Changhai Hospital, Second Military Medical University
| | - Lu Shi
- Department of Public Health Sciences, Clemson University
| | - Zhaoshen Li
- Digestive Endoscopy Center, Department of Gastroenterology, Changhai Hospital, Second Military Medical University
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Ding Y, Gao BB, Zhou L, Ye XH, Li H, Lai L, Huang JY. Clinical implications of plasma Nogo-A levels in patients with coronary heart disease. Arch Med Sci 2017; 13:771-777. [PMID: 28721144 PMCID: PMC5510510 DOI: 10.5114/aoms.2016.58713] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 12/28/2015] [Indexed: 11/28/2022] Open
Abstract
INTRODUCTION Nogo-A is an important neurite growth-regulatory protein in the adult and developing nervous system. Recently, increasing evidence has shown that Nogo-A plays important roles in cardiac development and may act as a potential indicator for heart failure. In addition, increased oxidative stress has been found in individuals with cardiovascular diseases. However, not much is known regarding the expression levels of Nogo-A and reactive oxygen species (ROS) in patients with coronary heart disease (CHD). Therefore, we sought to investigate the relationship between Nogo-A, ROS levels and CHD. MATERIAL AND METHODS The plasma Nogo-A and ROS concentrations of 122 acute coronary syndrome (ACS), 101 unstable angina pectoris (UAP), and 21 acute myocardial infarction (AMI) patients and 56 healthy controls were measured by enzyme-linked immunosorbent assay (ELISA). We further generated a receiver operating characteristic (ROC) curve to assess the diagnostic accuracy of Nogo-A and ROS in CHD. RESULTS The Nogo-A and ROS levels were significantly higher in patients with CHD than those in healthy controls. In addition, multivariate logistic regression analysis revealed that the level of Nogo-A (odds ratio (OR) = 1.624, 95% confidence interval: 1.125-2.293, p = 0.009) is a risk factor for prediction of CHD. Nogo-A has diagnostic value, with an optimal threshold of 5.466 ng/ml for maximized diagnostic performance (59% sensitivity and 78.6% specificity, area under curve, p < 0.05). However, ROS concentration is not a risk factor for prediction of CHD (OR = 0.999, 95% confidence interval: 0.997-1.001, p = 0.320). CONCLUSIONS Increased plasma Nogo-A level may be associated with CHD.
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Affiliation(s)
- Yu Ding
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Bei-Bei Gao
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Liang Zhou
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Xian-Hua Ye
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Hong Li
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Lei Lai
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Jin-Yu Huang
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
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Yi Y, Tian Z, Ju H, Ren G, Hu J. A novel NOTCH3 mutation identified in patients with oral cancer by whole exome sequencing. Int J Mol Med 2017; 39:1541-1547. [PMID: 28440410 DOI: 10.3892/ijmm.2017.2965] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 04/05/2017] [Indexed: 11/06/2022] Open
Abstract
Oral cancer is a serious disease caused by environmental factors and/or susceptible genes. In the present study, in order to identify useful genetic biomarkers for cancer prediction and prevention, and for personalized treatment, we detected somatic mutations in 5 pairs of oral cancer tissues and blood samples using whole exome sequencing (WES). Finally, we confirmed a novel nonsense single-nucleotide polymorphism (SNP; chr19:15288426A>C) in the NOTCH3 gene with sanger sequencing, which resulted in a N1438T mutation in the protein sequence. Using multiple in silico analyses, this variant was found to mildly damaging effects on the NOTCH3 gene, which was supported by the results from analyses using PANTHER, SNAP and SNPs&GO. However, further analysis using Mutation Taster revealed that this SNP had a probability of 0.9997 to be 'disease causing'. In addition, we performed 3D structure simulation analysis and the results suggested that this variant had little effect on the solubility and hydrophobicity of the protein and thus on its function; however, it decreased the stability of the protein by increasing the total energy following minimization (-1,051.39 kcal/mol for the mutant and -1,229.84 kcal/mol for the native) and decreasing one stabilizing residue of the protein. Less stability of the N1438T mutant was also supported by analysis using I-Mutant with a DDG value of -1.67. Overall, the present study identified and confirmed a novel mutation in the NOTCH3 gene, which may decrease the stability of NOTCH3, and may thus prove to be helpful in cancer prognosis.
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Affiliation(s)
- Yanjun Yi
- Department of Stomatology, Quzhou People's Hospital, Quzhou, Zhejiang 324000, P.R. China
| | - Zhuowei Tian
- Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai 200011, P.R. China
| | - Houyu Ju
- Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai 200011, P.R. China
| | - Guoxin Ren
- Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai 200011, P.R. China
| | - Jingzhou Hu
- Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai 200011, P.R. China
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Liu C, Eng C, Shen J, Lu Y, Takata Y, Mehdizadeh A, Chang GJ, Rodriguez-Bigas MA, Li Y, Chang P, Mao Y, Hassan MM, Wang F, Li D. Serum exosomal miR-4772-3p is a predictor of tumor recurrence in stage II and III colon cancer. Oncotarget 2016; 7:76250-76260. [PMID: 27788488 PMCID: PMC5342811 DOI: 10.18632/oncotarget.12841] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 10/11/2016] [Indexed: 01/19/2023] Open
Abstract
PURPOSE The study was aimed to evaluate the prognostic or predictive value of serum exosomal microRNAs (miRNAs) for tumor recurrence and response to adjuvant therapy in stage II and stage III colon cancer. RESULTS 145 differentially expressed mature miRNAs were identified (P<0.05) and 10 top hits were carried forward in validation test. MiR-4772-3p was significantly under-expressed in 27 patients with recurrence compared to in 57 patients without recurrence (P=0.002). The reduced expression was significantly related to increased risk of tumor recurrence and risk of death. As a predictor for tumor recurrence, ROC analysis revealed the AUC (95% CI) was 0.72 (0.59-0.85, P=0.001) for lower level of miR-4772-3p compared to 0.63 (0.51-0.75, P=0.062) for tumor site and 0.65 (0.51-0.78,P=0.034) for lymph node status. Among 66/84 patients who received FOLFOX adjuvant therapy, 9/10 (90%) patients with a lower level and 10/56 (18%) patients with a higher level of miR-4772-3p had tumor recurrence (P<0.001). MATERIALS AND METHODS Blood samples were prospectively collected from84 patients with stage II/III colon cancer after tumor resection and before adjuvant therapy. Serum exosomal miRNA profiles were determined by RNA sequencing. Differentially expressed mature miRNAs were identified between patients with or without tumor recurrence. The top hits were validated in individual RNA samples using quantitative real-time reverse transcription PCR. CONCLUSIONS Reduced expression of serum exosomal miR-4772-3p is a prognostic biomarker for tumor recurrence in stage II and stage III colon cancer patients. The predictive value of this marker for response to FOLFOX adjuvant therapy needs further investigation.
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Affiliation(s)
- Chang Liu
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
- Department of Gastroenterology and Hepatology, Jinling Hospital, Southern Medical University, Nanjing, China
| | - Cathy Eng
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jianjun Shen
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, Texas, USA
| | - Yue Lu
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, Texas, USA
| | - Yoko Takata
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, Texas, USA
| | - Amir Mehdizadeh
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - George J. Chang
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Miguel A. Rodriguez-Bigas
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Yanan Li
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Ping Chang
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Yixiang Mao
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Manal M. Hassan
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Fangyu Wang
- Department of Gastroenterology and Hepatology, Jinling Hospital, Southern Medical University, Nanjing, China
| | - Donghui Li
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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Jia S, Qiao X, Ye J, Fang X, Xu C, Cao Y, Zheng M. Nogo-C regulates cardiomyocyte apoptosis during mouse myocardial infarction. Cell Death Dis 2016; 7:e2432. [PMID: 27763637 PMCID: PMC5133994 DOI: 10.1038/cddis.2016.331] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Revised: 09/17/2016] [Accepted: 09/20/2016] [Indexed: 01/03/2023]
Abstract
Myocardial infarction is caused by insufficient coronary blood supply, which leads to myocardial damage and eventually the heart failure. Molecular mechanisms associated with the loss of cardiomyocytes during myocardial infarction (MI) and ischemia-related cardiac diseases are not yet fully understood. Nogo-C is an endoplasmic reticulum protein ubiquitously expressed in tissues including in the heart, however, the cardiac function of Nogo-C is still unknown. In the present study, we found that Nogo-C was upregulated in mouse hearts after MI, and hypoxic treatments also increased Nogo-C protein level in cardiomyocytes. Adenovirus mediated overexpression of Nogo-C led to cardiomyocyte apoptosis, whereas knockdown of Nogo-c by shRNA protected cardiomyocytes from hypoxia-induced cell apoptosis. Importantly, Nogo-C knockout mice displayed improved cardiac function, smaller infarct area, and less apoptotic cells after MI. Moreover, we found that miR-182 negatively regulated Nogo-C expression and was downregulated during MI, expressing miR-182 in cardiomyocytes protected hypoxia- and Nogo-C-mediated cell apoptosis. Our results indicate that increased cardiac Nogo-C expression is both sufficient and necessary for ischemia-induced cardiomyocyte apoptosis and cardiac dysfunction, suggesting that deregulation of Nogo-C by miRNA may be a potential therapeutic target for ischemia-related heart diseases.
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Affiliation(s)
- Shi Jia
- Department of Physiology and Pathophysiology, Health Science Center, Peking University, Beijing 100191, China
| | - Xue Qiao
- Department of Physiology and Pathophysiology, Health Science Center, Peking University, Beijing 100191, China
| | - Jingjing Ye
- Department of Physiology and Pathophysiology, Health Science Center, Peking University, Beijing 100191, China
| | - Xuan Fang
- Department of Physiology and Pathophysiology, Health Science Center, Peking University, Beijing 100191, China
| | - Chunling Xu
- Department of Physiology and Pathophysiology, Health Science Center, Peking University, Beijing 100191, China
| | - Yangpo Cao
- Department of Physiology and Pathophysiology, Health Science Center, Peking University, Beijing 100191, China
| | - Ming Zheng
- Department of Physiology and Pathophysiology, Health Science Center, Peking University, Beijing 100191, China
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Fang S, Zhang Y, Xu M, Xue C, He L, Cai L, Xing X. Identification of Damaging nsSNVs in HumanERCC2 Gene. Chem Biol Drug Des 2016; 88:441-50. [PMID: 27085493 DOI: 10.1111/cbdd.12772] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 03/29/2016] [Accepted: 03/30/2016] [Indexed: 01/05/2023]
Abstract
The hERCC2 gene is an important DNA repair molecule for initiating Cutaneous melanoma (CM). Therefore, it is advisable to study the possible functional SNVs in hERCC2. To achieve this goal, we collected total 2, 253 SNVs in hERCC2from the EMBL website, of which 303 are non-synonymous single nucleotide variants (nsSNVs). Then, SIFT and PolyPhen were used to predict the damaging nsSNVs, and four nsSNVs (rs368866996, rs377739017, rs370819591, and rs121913022) were suggested to be damaging mutations. Since I-Mutant2.0 showed a decrease in stability for the mutants containing each of the four nsSNVs, a 3D protein structure was modeled. Based on the comparison of the energy after minimization, RMSD and stabilizing residues between the native and mutant proteins' structure, rs121913022 was proposed to be the most damaging variant among the nsSNVs in hERCC2 gene by decreasing the stability of protein. The mutant G713R of hERCC2 protein caused by rs121913022 was found to have less expression level than native hERCC2 protein in melanoma cells. These results suggest that rs121913022 may have potentially important clinical and drug target implications.
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Affiliation(s)
- Shuo Fang
- Department of Plastic and Reconstruction, Shanghai Changhai Hospital Affiliated to Second Military Medical University, Shanghai, 200433, China.,Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Key Laboratory of Psychotic Disorders (No. 13dz2260500), Bio-X Institutes, Shanghai Jiaotong University, Shanghai, 200240, China
| | - Yuntong Zhang
- Department of Orthopedics, Shanghai Changhai Hospital Affiliated to Second Military Medical University, Shanghai, 200433, China
| | - Miao Xu
- Department of Plastic and Reconstruction Surgery, Xinhua Hospital, Shanghai Jiaotong University, Shanghai, 200092, China
| | - Chunyu Xue
- Department of Plastic and Reconstruction, Shanghai Changhai Hospital Affiliated to Second Military Medical University, Shanghai, 200433, China
| | - Lin He
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Key Laboratory of Psychotic Disorders (No. 13dz2260500), Bio-X Institutes, Shanghai Jiaotong University, Shanghai, 200240, China
| | - Lei Cai
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Key Laboratory of Psychotic Disorders (No. 13dz2260500), Bio-X Institutes, Shanghai Jiaotong University, Shanghai, 200240, China
| | - Xin Xing
- Department of Plastic and Reconstruction, Shanghai Changhai Hospital Affiliated to Second Military Medical University, Shanghai, 200433, China
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Dai X, Sun Z, Liang R, Li Y, Luo H, Huang Y, Chen M, Su Z, Xiao F. Recombinant Nogo-66 via soluble expression with SUMO fusion in Escherichia coli inhibits neurite outgrowth in vitro. Appl Microbiol Biotechnol 2015; 99:5997-6007. [PMID: 25758955 DOI: 10.1007/s00253-015-6477-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 02/10/2015] [Accepted: 02/12/2015] [Indexed: 11/28/2022]
Abstract
Nogo-66, a hydrophilic loop of 66 amino acids flank two hydrophobic domains of the Nogo-A C terminus, interacts with the Nogo-66 receptor (NgR) to exert numerous functions in the central nervous system (CNS). Nogo-66 has important roles in aspects of neuronal development, including cell migration, axon guidance, fasciculation, and dendritic branching, and in aspects of CNS plasticity, including oligodendrocyte differentiation and myelination. Here, the small ubiquitin-related modifier (SUMO) was fused to the target gene, Nogo-66, and the construct was expressed in Escherichia coli (E. coli). Under the optimal fermentation conditions, the soluble expression level of the fusion protein was 33 % of the total supernatant protein. After cleaving the fusion proteins with SUMO protease and purifying them by Ni-NTA affinity chromatography, the yield and purity of recombinant Nogo-66 obtained by 10-L scale fermentation were 23 ± 1.5 mg/L and greater than 93 %, respectively. The authenticity of the recombinant Nogo-66 was confirmed by an electrospray ionization-mass spectrometry analysis. The functional analyses indicated that the recombinant Nogo-66 was capable of binding the NgR specifically. The immunofluorescence results showed that the recombinant Nogo-66 could significantly inhibit neurite outgrowth of rat pheochromocytoma (PC12) cells stimulated by nerve growth factor and cerebellar granule cells (CGCs). Furthermore, Nogo-66 inhibited neurite outgrowth by increasing the level of phosphorylated Rho-associated coiled-coil-containing protein kinase 2 (ROCK2), collapsin response mediator protein 2 (CRMP2), and myosin light chain (MLC). This study provided a feasible and convenient production method for generating sufficient recombinant Nogo-66 for experimental and clinical applications.
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Affiliation(s)
- Xiaoyong Dai
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Jinan University, Guangzhou, 510632, People's Republic of China
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