ABSTRACT
Objective:To study the correlation of serum tenascin C (TNC) and bronchopulmonary dysplasia (BPD) comorbid pulmonary hypertension (PH) in preterm infants.Methods:From January 2017 to June 2020, preterm infants (gestational age<32 weeks) diagnosed of severe BPD admitted to the Neonatal Intensive Care Unit of our hospital were prospectively studied. Comorbidity of PH was evaluated using echocardiography and the infants were assigned into PH (+) group and PH (-) group. At the same time, serum TNC was examined and the correlation between serum TNC level and PH in infants with severe BPD was analyzed.Results:A total of 59 infants with severe BPD were enrolled, including 21 cases comorbid PH (35.6%). The serum TNC level in the PH (+) group was significantly higher than the PH (-) group [(123.7±41.1) ng/ml vs. (78.2±20.2) ng/ml, P<0.05]. Correlation analysis showed a positive correlation between the serum TNC level and systolic pulmonary artery pressure (sPAP) ( r=0.861, P<0.001).The area under the receiver operating characteristic curve of serum TNC predicting BPD comorbid PH was 0.884. The sensitivity and specificity of serum TNC predicting BPD comorbid PH were 84.0% and 76.9% with TNC≥87.7 ng/ml as the cut-off. Conclusions:Severe BPD comorbid PH is common. The serum TNC level in infants with severe BPD comorbid PH is increased and positively correlated with sPAP. The serum TNC level has certain clinical value in predicting and evaluating the severity of BPD comorbid PH.
ABSTRACT
Objective:To compare peripheral blood tenascin-C (TN-C) level in patients with Kawasaki disease (KD) on admission, after treatment and at recovery, and to assess the potential of TN-C as a novel predictor for coronary artery lesion.Methods:Retrospective study.Blood samples of 44 KD patients [including 21 patients with coronary artery lesions (CAL + group) and 23 patients without coronary artery lesions(CAL - group)], 39 anaphylactoid purpura patients and 36 non-infected and non-vasculitis controls in the Affiliated Hospital of North Sichuan Medical College during January 1, 2018 and November 1, 2018 were collected.TN-C level was measured by enzyme-linked immunosorbent assay.Normally distributed data were compared by the t test; otherwise, they were compared by the Mann- Whitney U test. Pearson product-moment correlation coefficient or Spearman rank correlation coefficient was used to analyze the correlation between TN-C and other laboratory indexes. Results:For KD patients, TN-C levels on admission [(32.0±13.8) μg/L] and after treatment [(33.5±11.4) μg/L] were significantly higher than that at recovery [(23.3±10.8) μg/L](all P<0.01), which was positively correlated with C-reactive protein ( r=0.317, P=0.038), and negatively correlated with sodium level ( r=-0.472, P=0.004). No significant difference in TN-C level was found between CAL + group and CAL - group [on admission: (31.7±15.4) μg/L vs.(32.3±12.5) μg/L; after treatment: (32.2±11.6) μg/L vs.(34.8±11.3) μg/L; at recovery: (22.6±7.3) μg/L vs.(24.0±13.4) μg/L; all P>0.05]. In addition, TN-C level in patients with KD [(32.0±13.8) μg/L] and anaphylactoid purpura [(37.2±18.2) μg/L] was significantly higher than that of control children [(24.0±8.05) μg/L] (all P<0.01). Conclusions:The study findings are able to prove the potential of peripheral blood TN-C as a predictor for coronary artery lesion in KD patients, nor as a maker of vascular injury.Nevertheless, it may be used as an indicator of immune response in the acute phase of KD.
ABSTRACT
Objective:To explore the serum tenascin-C levels in patients with acute ST-segment elevation myocardial infarction (STEMI) and its impact on the long-term prognosis.Methods:One hundred and thirteen STEMI patients who were admitted to the Department of Cardiology of the First Affiliated Hospital of Dalian Medical University and successfully underwent emergency PCI from June 2015 to June 2016 were included in this prospective study. The serum tenascin-C levels were measured during hospitalization, and the patients were divided into tenascin-C ≥ 120 μg/L group and tenascin-C<120 μg/L group according to the serum tenascin-C level. Major adverse cardiovascular events (MACE) were observed during the 5 years follow up in all patients. According to the incidence of MACE, the patients were divided into MACE group and non-MACE group, and the predictive factors of MACE were analyzed. Continuous variables were presented as the mean±standard deviation and compared with the Student′s t-test. Categorical variables were presented as percentages and compared with the Chi-square test or Fisher′s exact test. Receiver operating characteristic (ROC) curve was used to analyze the value of serum tenascin-C level in predicting MACE in STEMI patients. Kaplan Meier survival analysis was used to compare the incidence of MACE between two groups. Cox proportional hazards regression model was used to analyze the risk factors of MACE during the 5 years follow up.Results:The serum tenascin-C levels in the STEMI patients increased on the first day after the onset of disease (46.5±24.8 μg/L), peaked on the third day (97.5±41.2 μg/L), and then gradually decreased. All patients were followed up for 5 years. There were 37 cases of MACE, including 4 cases of cardiac death (3.5%), 14 cases of heart failure (12.4%), 14 cases of recurrent myocardial infarction or revascularization (12.4%), and 5 cases of stroke (4.4%). For prediction of MACE, the area under the curve of the serum TN-C level was 0.953 (95% CI 0.918-0.988, P<0.05), which was thus a valuable biomarker in predicting MACE for STEMI patients. The incidence of MACE in the group of tenascin-C≥120 μg/L group was higher than that in the group of tenascin-C<120 μg/L group (86.4% [19/22] vs 19.8% [18/91]), and Kaplan-Meier survival analysis showed that the difference was statistically significant ( P<0.05). Cox proportional hazards model analysis showed that serum tenascin-C level was an independent predictor of MACE for STEMI patients during the 5 years follow-up ( HR=1.007, 95% CI 1.001-1.012, P<0.05). In addition, other variables including high sensitivity C-reactive protein ( HR=1.028, 95% CI 1.007-1.049, P<0.05), and cardiac troponin Ⅰ ( HR=1.004, 95% CI 1.000-1.008, P<0.05) were also found to be the independent predictors of MACE. Conclusions:The serum tenascin-C levels in STEMI patients increased significantly during the acute disease phase. Detecting the serum tenascin-C levels is valuable for predicting MACE in STEMI patients, and serum tenascin-C is an independent predictor of MACE in STEMI patients during the long-term follow-up period after acute myocardial infarction.
ABSTRACT
Objective To investigate the relationship between tenascin-C (TNC) and acute rejection (AR) early after liver transplantation. Methods Six Brown Norway (BN) rats and 16 Lewis rats were divided into the AR group (Lewis→BN, 6 donors and 6 recipients) and control group (Lewis→Lewis, 5 donors and 5 recipients). The transplant liver tissues from rats in two groups were subjected to pathological examination. The rejection activity index (RAI) was evaluated by Banff schema. The expression of TNC proteins in the transplant liver tissues were determined by immunohistochemical staining and Western blot. The expression level of serum TNC was detected by enzyme-linked immune absorbent assay (ELISA), and the correlation between TNC and RAI score was analyzed. Results Pathological examination of the transplant liver at 7 d after liver transplantation showed that the RAI score in the AR group was higher than that in the control group. Immunohistochemical staining results found that the distribution of TNC positive cells of the transplant liver in the AR group was more than that in control group at postoperative 7 d. Western blot showed that the relative expression level of TNC protein in the AR group was significantly higher than that in the control group at 7 d after liver transplantation (t=5.112, P=0.007). ELISA results revealed that the serum TNC expression level in the AR group was significantly higher than that in the control group at 7 d after liver transplantation (t=3.152, P=0.012). The serum TNC expression level was positively correlated with the RAI score (r=0.790 9, P=0.004). Conclusions The expression level of TNC is associated with AR after liver transplantation. TNC may become a novel target for diagnosis and treatment of AR early after liver transplantation.
ABSTRACT
Objective To investigate the clinical implications of serum tenascin-C (TNC) levels for lung injury and the prognosis in acute paraquat (PQ) poisoning patients.Methods Clinical data of acute PQ poisoning patients hospitalized in Emergency Department of First Hospital of China Medical University from January 1 to December 31,2017 were prospectively collected.Patients' serum samples were obtained on admission and serum TNC levels were quantified by a commercially available enzymelinked immunosorbent assays (ELISA) kit.Patients were followed up to 28 d after poisoning and divided into the survival and non-survival groups.The differences of clinical data together with serum TNC level between the two groups were analyzed by univariable analysis.The correlation between serum TNC level and liver function,renal function and artery blood gas results was analyzed.Logistic regression analysis was used for assessing the independent risk factors of death.ROC curves of related parameters were plotted and the area under the curve (AUC) was calculated.Results Eighty-two patients were enrolled in this study:35 patients in the non-survival group and 47 patients in the survival group.There was no significant difference of data on admission between the two groups,including pH,PaO2,Cr,BUN,ALT,TBil,AMS,TNC,lung CT positive rate.But PaCO2,Lac,urine paraquat concentration and serum TNC level on admission were significantly different between the survival and non-survival groups.Furthermore,serum TNC level was correlated significantly with the worst PaO2 value,pH,and lung CT positive rate within 72 h from admission,especially the worst PaO2 value (r=-0.801,P＜0.01).Logistic regression analysis showed that the serum TNC level on admission was an independent risk factor for the prognosis of acute PQ poisoning patients.The AUC was 0.895 and the cutoff value was 41.9 ng/mL.Conclusion The early serum TNC level in acute PQ poisoning patients can predict the degree of lung injury and evaluate the prognosis.
ABSTRACT
The expression levels of serum tenascin-C, osteopontin(OPN), and transforming growth factor-β1(TGF-β1) in the patients of diabetic mellitus were measured by ELISA. With the increase of the UACR, the expression of tenascin-C, osteopontin, and transforming growth factor-β1 showed a trend of increase and hypertension will argument this phenomenon. Pearson correlation analysis showed that levels of tenascin-C were positively correlated with HbA1C , body mass index, systolic blood pressure, diastolic blood pressure, UACR, osteopontin, and transforming growth factor-β1.
ABSTRACT
Objective To explore the clinical application of the expression of LOXL2 mRNA and Tenascin-C mRNA in tissues for the disease with the bile duct cancer.Methods The serum and clinical data in 35 cases of patients with the bile duct cancer (cancer group) and 28 cases of patients with normal bile duct tissue (control group) were collected,used the real-time fluorescent quantitative PCR (real-time-PCR,RT-PCR) technology to detect the expression of LOXL2 mRNA and TenascinC mRNA in tissues toobserve the relationship between the changes and the bile duct cancer for the two markers.Results The expression of LOXL2 mRNA and Tenascin-C mRNA in tissues in the cancer group were 1.27±0.18 and 1.39±0.19,which of ones in the control group were 0.20±0.06 and 0.23±0.06.In the cancer group,the expression of LOXL2 mRNA and Tenascin-C mRNA in tissues respectively with comparision to those in the control group were significantly higher,the differences had statistical significance(t=52.18,56.87,P＜0.01),which of ones in the cancer group was positively related (r=0.687,P＜0.01).Conclution The expression of LOXL2 mRNA and Tenascin-C mRNA in tissues may be a molecular targets for the disease with the bile duct cancer in the early diagnosis and judgment of progression in the courses of this disease.
ABSTRACT
Transplantation of bone marrow derived stem cells (BMSCs) has been reported inhibits liver fibrosis. Several in vitro studies by co-culturing BMSCs and hepatic stellate cells (HSCs) indirectly or directly in 2D models showed inhibition of HSC as the key player in liver fibrosis. In this study, we investigated direct effect of BMSCs on HSCs by co-culturing BMSCs and HSCs in 3D model as it represents the liver microenvironment with intricate cell-cell and cell-matrix interactions. Primary isolated rat HSCs and BMSCs were directly co-cultured at 1:1 ratio with hanging drop method. The monoculture of rat HSCs served as positive control. Mono-culture and co-culture samples were harvested on day 3, 5 and 7 for histological analysis. The samples were analyzed for extracellular matrix deposition by Masson's Trichrome staining, tenascin-C immunocytochemistry, resting HSC's state as shown by positive Oil Red O stained cells. Our results indicated CD90+CD34− BMSCs anti-liver fibrosis potency as evidenced by higher proportion of Oil Red O-positive cells in the co-culture group compared to the monoculture group and the significant decrease in extracellular matrix deposition as well as the decrease in tenascin-C expression in the co-culture group (p<0.05) compared to the monoculture group. These findings demonstrate that BMSCs have a potential therapeutic effect against liver fibrotic process through their capacity to inhibit HSCs activation and their effect in minimizing extracellular matrix deposition.
Subject(s)
Animals , Rats , Bone Marrow , Coculture Techniques , Extracellular Matrix , Fibrosis , Hepatic Stellate Cells , Immunohistochemistry , In Vitro Techniques , Liver , Liver Cirrhosis , Methods , Stem Cells , TenascinABSTRACT
Objective To explore the feasibility of 7.0T MR scanner in mouse aorta atherosclerosis models.Visualising the TN-C in atherosclerotic plaque by immunohistochemistry and its correlation with CD68 to provide experimental basis for the feasibility of TN-C in targeted MRI.Methods ApoE-/- mice and wild type C57 mice were fed on high fat diet to establish aorta atherosclerosis model (n=10),the aorta were observed by MRI after 14 weeks.The aorta specimens were taken to stain with HE to observe the pathological changes.The plaque was stained with oil red O,anti-TNC and TN-C antibody respectively to observe the fat,CD68 and TN-C in plaque.Results 7.0 MRI showed the aortic wall of the experimental group was thicker,high signal on T1 WI and PDWI,and low signal on T2 WI after 14 weeks.The histopathlogic examination showed the intima was obviously thicker,and the lumen was ir-regulary narrow.Both of CD68 and TN-C were highly expressed in plaque,and the distribution of TN-C correlated with CD68.In the control group,no case showed hyper-signal in the vessel wall of aorta or narrow lumen by MRI,and the histopathlogy showed no for-mation of atherosclerotic plaque in the aorta.Conclusion Aorta atherosclerotic plaque can be established through high fat diet on ApoE-/- mouse,and 7.0 MR can successfully detect it.TN-C is high expressed in AS plaque and the expression is correlated with CD68,which may suggest that they may collaborate in the development of AS.Detecting TN-C could be useful for the further study of atherosclerotic plaque.
ABSTRACT
Acute aortic dissection(AAD) is a medical emergency caused by the destruction of the aortic tunica media and is always fatal. Genetic disorders are known to be responsible for AAD, but little is known about the etiology of other non-genetic cases. Tenascin-C(TnC) is a large extracellular matrix glycoprotein and mechanical stretching can up-regulate TnC expression. TnC knockout (TnC-KO) mice have higher blood pressure in the aortic artery and are liable to develop AAD; and mice with AAD have more inflammatory cells in the aortic tissue. TnC prevents aorta from AAD by regulating ECM structure, regulating vascular smooth muscle cell function and inhibiting inflammatory response in the aorta. In this paper we reviewed the role of TnC in the development and progression of AAD.
ABSTRACT
10.3969/j.issn.2095-4344.2013.26.005
ABSTRACT
Objective The purpose of the present study was to investigate the effect of peroxisome proliferator-activated receptors δ（PPAR δ）activation with dietary GW610742X on the expression of tenascin-C in the infarcted and remodeling myocardium.Methods Sixty male Wistar rats were divided into four groups,including control group,sham group,myocardial infarction（MI） group,and MI＋GW610742X（GW）group.The left coronary artery was ligated to establish the MI model.PPAR δ activator GW610742X（100mg/kg/d）was administrated into the rats of GW group.At 3 months after procedure,the expression and distribution of tenascin-C in left ventricular free wall from each group were examined by Western blotting and immunofluorescence,respectively.Results After 3 months following procedure,there were obvious necrosis and fibrosis in left ventricular free wall from MI group.The expression of tenascin-C in MI and GW group was significantly higher than those in control and sham group（P 〈 0.01）.Moreover,tenascin-C expression in GW group was remarkably decreased compared to MI group（P 〈 0.05）.Additionally,tenascin-C expression in sham group was similar to that in control group（P 〉 0.05）.Conclusion The tenascin-C is upregulated in infarcted myocardium during the remodeling process,which can be significantly attenuated by PPAR δ activation.
ABSTRACT
Objective To investigate the effect of glucocortieoids on tenasein C(TNC) expression in nasal polyp tissues and airway epithelia,and explore the possible mechanism of glucocorticoids inhibiting remodeling of nasal polyp tissue.Methods The enzyme linked immunosorbent assay(ELISA) was used to detect the protein levels of tenascin C and transforming growth factor-β1(TGF-β1) in nasal polyp tissues from intranasal glucocorticoids (Budesonide,BUD) treated group and untreated group.The cell culture,real-time RT-PCR and in situ ELISA were employed to investigate the regulatory effects of budesonide on the TNC mRNA and protein expression in BEAS-2B immortalized human bronchial epithelial cells.Results The protein levels of TNC and TGF-β1 were decreased in nasal polyp tissues from intranasal BUD-treated group as compared with untreated group(P<0.01).There was a significantly positive correlation between TNC and TGF-β1 protein levels in nasal polyp tissues (r =0.68,P<0.01).After preincubation with BUD,TNC mRNA and protein expression induced by TGF-β1 in BEAS-2B cells was significantly decreased(P<0.01).Conclusion Glucocorticoids might participate in the regulation of tissue remodeling in nasal polyp by inhibiting the TGF-β1 expression in nasal polyp tissue and suppressing the induction of TGF-β1 to up-regulatie the TNC expression in airway epithelia.
ABSTRACT
As lesões proliferativas não-neoplásicas correspondem a respostas teciduais decorrentes de estímulos crônicos de longa duração. Dentro deste grupo enquadra-se o granuloma piogênico, lesão periférica de células gigantes, fibroma ossificante periférico e hiperplasia fibrosa. O objetivo da pesquisa foi observar através da técnica da imuno-histoquímica, se existem diferenças na intensidade, padrão, continuidade e localização da expressão das proteínas da matriz extracelular representadas pela tenascina-C e fibronectina, com a finalidade de contribuir para o melhor entendimento dessas lesões. Utilizou-se 05 casos de cada entidade patológica supracitada, além de 05 espécimes de mucosa oral normal com finalidade comparativa. Observou-se a expressão da tenascina-C e fibronectina na interface epitélio-conjuntivo, bem como na proximidade de vasos sanguíneos nas hiperplasias fibrosas inflamatórias, lesão periférica de células gigantes e fibromas ossificantes, evidenciando o seu envolvimento nos processos de remodelação tecidual. Nossos resultados demonstram que a tenascina-C e a fibronectina são componentes teciduais importantes no desenvolvimento dessas patologias.
The no neoplasic proliferative lesions correspond the tissue reactive originating of long duration chronic stimulus. In this group frame pyogenic granuloma, peripheral giant cell granuloma, peripheral fibroma ossifying and fibrous hyperplasia. The aim of the research was observe, using immunohistochemical technique, if to exist differences in intensity, pattern, continuity and localization of the expression of the proteins of the matrix extrecellar, represent by tenascin-C and fibronectin, with finality of contribute for a best knowledge these lesions. Evaluated 05 cases of each lesion, as well as 05 specimen of normal oral mucosa with comparative finality. It was observed expression in interface conjunctive-epithelium, as well as in the proximity of blood vesseis in the fibrous hyperplasia, peripheral giant cell lesion and ossifying fibroma, evidencing your involvement in the process of improvement of the tissues. Our results demonstrate that those proteins can participate in the development these pathologies, fortifying as soon, your involvement in the process of improvement of the tissues.
Subject(s)
Immunohistochemistry , Fibronectins , TenascinABSTRACT
0.05).Tn-C、CD44v6 were negative expression in group C.Conclusion Tn-C、CD44v6 protein are useful in early diagnosis of follicular thyroid carcinoma.
ABSTRACT
Objective To explore the temporal and spatial expression pattern of tenascin-c(tnc) and tenascin-w(tnw) in zebrafish early development,to further explore the role of tenacsin in zebrafish embryo development,and the association between them.Methods Zebrafish embryos at 2 hours post fertilization(hpf),4 hpt,8 hpt,10 hpf,24 hpt,48 hpr,72 hpf and 7 days post fertilization(dpf) were collected to extract RNA for reverse transcription-polymerase chain reaction(RT-PCR) and fix the embryos at different stages for in situ hybridization.Temporal and spatial expression pattern of tnc and tnw on different stages of zebrafish early development was observed.Results tnc and tnw all expressed in zebrafish from 24 hpf to 7 dpf,but did not expressed from 2 hpf to 10 hpf.Tnc expressed at pharyngeal arch,notochord,somite in 24 hpf,then weakly expressed at somite,but highly expressed at otic vesicle,pectoral fin and hindbrain in 48 hpf,and tnc was expressed at hindbrain,pharyngeal and notochord and disappeared at somite and pectoral.tnw expressed at hindbrain,midbrain and otic vesicle in 24 hpf,expressed at somite,notochord,hindbrain,otic vesicle and pharyngeal in 48 hpf.In 72 hpf,tnw expressed weakly at somite and notochord.Conclusions Zebrafish tnc and tnw have special temporal and spatial expression pattern,and share partial overlapping expression pattern.
ABSTRACT
Objective To investigate the effect of Tenascin-C on remodeling of ventricle in mice with chronic autoimmune myocarditis.Methods Seventy-five specific pathogen-free BALB/c mice were divided into experimental group(n=45)and control group(n=30).Animals in experimental group were immunized with an emulsion of polypeptides(myhc-? 614-629)and complete Freund's adjuvant(CFA)on day 1 and day 8,while those in control group with equal volume of mixture of phosphate buffer solution(PBS)and CFA.Groups of mice were sacrificed respectively on day 21,day 75 and day 120 after the first immunization.Hematoxylin and eosin(H-E)staining was used to identify the areas of inflammation,and Masson staining was used to identify the areas of fibrosis.The Tenascin-C protein expression in myocardium was detected by Western blotting.The content of serum procollagen type-Ⅲ amino-terminal propeptide(PⅢNP)was measured by radioimmunoassay.The correlation between Tenascin-C protein expression and content of serum PⅢNP was analyzed.Results On day 21,inflammatory infiltration in the myocardium was remarkable,with slight deposition of collagen in the interstitial tissue.On day 75 and day 120,inflammatory infiltration in myocardium was markedly reduced,but with more marked deposition of collagen.The Tenascin-C protein expression in myocardium and the content of serum PⅢNP were significantly higher in experimental group than in control group(P
ABSTRACT
Objective To explore the expression pattern of tenascin-c(tnc)gene in zebrafish embryo abnormal development which was induced by ethanol,and to further understand the function of tnc gene in embryo develepment.Methods Zebrafish were treated with ethanol at different concentration from 100 to 500 mmol/L,and embryos at 24 and 48 hours were collected and fixed,then tnc expression pattern was observed by in situ hybridization and reverse transcriptase-polymerase chain reaction(RT-PCR).Results The result of RT-PCR showed that ethanol at 100 and 200 mmol/L could increase the expression of tnc,while the result of in situ hybridization showed that,while ethanol at 300 mmol/L and above decrease the expression of tnc in presumptive position at 24 hours,and ethanol at 100 mmol/L and above caused increase expression of tnc in zebrafish heart.Conclusions tnc is increased when treated with 100 and 200 mmol/L ethanol and is presented in the abnormal development of hearts of zebrafish,which can promote the normal development of embryos in some degrees.The expression pattern of tnc in pathologic state is highly conserved in all vertebrate,and in adult and embryos as well.