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Otgongerel D, Lee HJ, Jo SA. Induction of ICAM1 in Brain Vessels is Implicated in an Early AD Pathogenesis by Modulating Neprilysin. Neuromolecular Med 2022. [PMID: 35948857 DOI: 10.1007/s12017-022-08726-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Accepted: 07/26/2022] [Indexed: 10/15/2022]
Abstract
Intercellular adhesion molecule 1 (ICAM1) is a vessel adhesion protein induced during brain vascular inflammation, which could be closely linked with the development of Alzheimer's disease (AD). This study investigated the effect of ICAM1 on amyloid-degrading enzymes (ADEs) in endothelial cells and their potential involvement in inflammation and AD progression. TNF-α treatment increased ICAM1 in human brain microvascular endothelial cells (HBMVECs) but decreased the neprilysin (NEP) protein level. Knock-down of ICAM1 using siRNA enhanced NEP, which increased the degradation of amyloid-β. In the brains of 4-month-old AD transgenic mice (APPswe/PSEN1dE9), there were significantly higher levels of ICAM1 expression and amyloid deposits but lower levels of NEP and insulin-degrading enzymes (IDE), demonstrating an inverse correlation of ICAM1 with NEP and IDE expression. Further studies demonstrated significantly increased GFAP protein levels in the brain, specifically localized near blood vessels, of both TNF-α-injected and 4-month-old AD transgenic mice. Taken together, the induction of ICAM1 in endothelial cells suppresses NEP expression, accelerating the accumulation of amyloid-β in blood vessels. It also enhances leukocyte adhesion to blood vessels stimulating the migration of leukocytes into the brain, subsequently triggering brain inflammation.
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Wechjakwen N, Aroonnual A, Prangthip P, Soonthornworasiri N, Phienluphon PP, Lainampetch J, Kwanbunjan K. Associations between the rs5498 (A > G) and rs281432 (C > G) polymorphisms of the ICAM1 gene and atherosclerotic cardiovascular disease risk, including hypercholesterolemia. PeerJ 2022; 10:e12972. [PMID: 35282277 PMCID: PMC8916030 DOI: 10.7717/peerj.12972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 01/30/2022] [Indexed: 01/11/2023] Open
Abstract
Background Atherosclerotic cardiovascular disease (ASCVD) originates from complex risk factors, including age, gender, dyslipidemia, obesity, race, genetic and genetic variation. ICAM1 gene polymorphisms are a significant risk factor for ASCVD. However, the impact of the rs5498 and rs281432 polymorphisms on the prevalence of hypercholesterolemia (HCL) has not been reported. Therefore, we determine the relationships between single nucleotide polymorphisms (SNPs), including rs5498 and rs281432 on Intercellular adhesion molecule 1 gene (ICAM1) and ASCVD susceptibility in patients with HCL. Methods The clinical characteristics of 278 participants were assessed, and classified to groups having HCL and without HCL. ICAM1 SNPs genotyping was performed by DNA sequencing, and ICAM1 expression was measured using real-time PCR. Results Positive dominant model rs5498 participants had twice the risk of HCL (95% confidence interval (CI): [1.24-3.23], P = 0.005). The frequency of the G allele in rs5498 was 1.69 times higher in participants with HCL than in controls (95% CI [1.15-2.47], P = 0.007). Participants with the rs5498 AG or GG variants and high ICAM1 mRNA expression (≥3.12) had 2.49 times the risk (95% CI [1.42-4.38], P = 0.001), and those with a high LDL-C concentration (≥3.36 mmol/L) had 2.09 times the risk (95% CI [1.19-3.66], P = 0.010) of developing ASCVD compared with those with low ICAM1 mRNA and LDL-C levels. Interestingly, participants carrying the rs5498 AG or GG variants who had tachycardia (resting heart rates (RHRs) >100 beats/min) had a 5.02-times higher risk than those with a lower RHR (95% CI [1.35-18.63], P = 0.016). Conclusions It may consider the G allele in ICAM1 rs5498 is associated with a higher risk of ASCVD in Thai people with HCL, and is also positively associated with ICAM1 mRNA expression, LDL-C concentration, and RHR.
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Affiliation(s)
- Naruemon Wechjakwen
- Department of Tropical Nutrition and Food Science, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Amornrat Aroonnual
- Department of Tropical Nutrition and Food Science, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Pattaneeya Prangthip
- Department of Tropical Nutrition and Food Science, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | | | - Jirayu Lainampetch
- Department of Nutrition, Faculty of Public health, Mahidol University, Bangkok, Thailand
| | - Karunee Kwanbunjan
- Department of Tropical Nutrition and Food Science, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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Abstract
The genetic variants of orosomucoid-like protein 3 (ORMDL3) gene are associated with highly significant increases in the number of human rhinovirus (HRV)-induced wheezing episodes in children. Recent investigations have been focused on the mechanisms of ORMDL3 in rhinovirus infection for asthma and asthma exacerbations. ORMDL3 not only regulates major human rhinovirus receptor intercellular adhesion molecule 1 expression, but also plays pivotal roles in viral infection through metabolisms of ceramide and sphingosine-1-phosphate, endoplasmic reticulum (ER) stress, ER-Golgi interface and glycolysis. Research on the roles of ORMDL3 in HRV infection will lead us to identify new biomarkers and novel therapeutic targets in childhood asthma and viral induced asthma exacerbations.
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Affiliation(s)
- You-Ming Zhang
- Section of Genomic and Environmental Medicine, National Heart and Lung Institute, Molecular Genetics Group, Division of Respiratory Sciences, Imperial College London, London SW3 6LY, United Kingdom
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Koga M, Kishi M, Fukusako T, Ikuta N, Kato M, Kanda T. Antecedent infections in Fisher syndrome: sources of variation in clinical characteristics. J Neurol 2019; 266:1655-1662. [PMID: 30955122 PMCID: PMC6586698 DOI: 10.1007/s00415-019-09308-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/01/2019] [Accepted: 04/01/2019] [Indexed: 11/28/2022]
Abstract
The clinical features of Guillain–Barré syndrome (GBS) are highly variable, according to the type of antecedent infection. Although a major GBS phenotype, Fisher syndrome (FS), has been shown to be preceded by infections similar to those preceding GBS, whether or not the clinical features in FS also vary according to antecedent infection remains unclarified. Frequent antecedent infections among this study of 70 FS patients included Haemophilus influenzae [n = 15 (21%)], Campylobacter jejuni [n = 10 (14%)], and cytomegalovirus (CMV) [n = 6 (8.6%)]. Compared with other FS patients, H. influenzae-seropositive FS patients more frequently had a history of prior upper respiratory tract infection; double vision as the initial symptom; and, except for oculomotor disturbance, more rarely showed cranial nerve involvement. C. jejuni-related FS occurred predominantly in younger male patients and characteristically presented with blurred vision. According to GBS disability scale, CMV-related FS tended to be more severe, although every patient received immunotherapy. Serum anti-GQ1b IgG antibodies were detected in most cases, regardless of antecedent infection type. At the nadir of illness, the most frequent diagnosis in H. influenzae-related cases was “pure FS” without limb weakness or central nervous system involvement (71%), in C. jejuni-related cases “incomplete FS” such as acute ophthalmoparesis with or without ataxia (60%), and in CMV-related cases (50%) advanced conditions such as GBS overlap and Bickerstaff brainstem encephalitis. These findings indicate that the type of preceding infection determined the neurological features of FS. CMV-related FS appeared to be similar to H. influenzae- and C. jejuni-related FS regarding anti-GQ1b antibody-mediated pathogenesis, as opposed to CMV-related GBS.
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Affiliation(s)
- Michiaki Koga
- Department of Neurology and Clinical Neuroscience, Yamaguchi University Graduate School of Medicine, Minami-kogushi 1-1-1, Ube, Yamaguchi, 755-8505, Japan.
| | - Masahiko Kishi
- Neurology, Internal Medicine, Sakura Medical Center, Toho University, Chiba, Japan.,Yachiyo Rehabilitation Hospital, Chiba, Japan
| | - Toshihiro Fukusako
- Department of Neurology, Yamaguchi Prefectural Grand Medical Center, Yamaguchi, Japan
| | - Naomi Ikuta
- Department of Neurology, Ube-Kosan Central Hospital, Yamaguchi, Japan
| | - Masayuki Kato
- Department of Neurology, Shimonoseki Medical Center, Yamaguchi, Japan
| | - Takashi Kanda
- Department of Neurology and Clinical Neuroscience, Yamaguchi University Graduate School of Medicine, Minami-kogushi 1-1-1, Ube, Yamaguchi, 755-8505, Japan
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Abu Seman N, Anderstam B, Wan Mohamud WN, Östenson CG, Brismar K, Gu HF. Genetic, epigenetic and protein analyses of intercellular adhesion molecule 1 in Malaysian subjects with type 2 diabetes and diabetic nephropathy. J Diabetes Complications 2015; 29:1234-9. [PMID: 26255081 DOI: 10.1016/j.jdiacomp.2015.07.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 06/30/2015] [Accepted: 07/03/2015] [Indexed: 11/26/2022]
Abstract
AIMS Recent research has implicated that the inflammation may be a key pathophysiological mechanism in diabetic nephropathy (DN). Intercellular adhesion molecule 1 (ICAM-1) is an acute phase marker of inflammation. In the present study, we carried out genetic, epigenetic and protein analyses of ICAM-1 in a Malaysian population, including normal glucose tolerance (NGT) subjects and type 2 diabetes (T2D) patients with or without DN in order to evaluate its role in DN. METHODS Analyses of DNA polymorphism and methylation in the ICAM1 gene were performed with TaqMan allelic discrimination and pyrosequencing, respectively. Plasma ICAM-1 levels were determined using an enzyme-linked immune-sorbent assay kit. RESULTS We found that the ICAM1 K469E(A/G) polymorphism (rs5498) was significantly associated with DN. Particularly, 86.1% of T2D patients with DN carried heterozygous genotype compared to the patients without DN (68.6%). Furthermore, plasma ICAM-1 levels were increased from NGT subjects to T2D patients without and with DN (P<0.001). The NGT subjects carrying heterozygous genotype had significantly lower plasma ICAM-1 levels compared to the K469(A/A) genotype carriers (P=0.009). In the ICAM1 gene promoter, DNA methylation levels of CpG sites were low, and no association of the ICAM1 DNA methylation alteration with DN was detected. CONCLUSION The present study provided evidence that the ICAM1 K469E(A/G) polymorphism with high heterozygous index and elevation of plasma ICAM-1 levels were associated with DN in a Malaysian population. Further prospective study of ICAM-1 protein according to the ICAM1 K469E(A/G) genotypes is necessary for predicting the susceptibility to T2D and DN.
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Affiliation(s)
- Norhashimah Abu Seman
- Rolf Luft Research Center for Diabetes and Endocrinology, Department of Molecular Medicine and Surgery, Karolinska University Hospital, Solna, Karolinska Institutet, Stockholm, Sweden; Cardiovascular, Diabetes and Nutrition Research Centre, Institute for Medical Research, Kuala Lumpur, Malaysia
| | - Björn Anderstam
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska University Hospital, Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Wan Nazaimoon Wan Mohamud
- Cardiovascular, Diabetes and Nutrition Research Centre, Institute for Medical Research, Kuala Lumpur, Malaysia
| | - Claes-Göran Östenson
- Rolf Luft Research Center for Diabetes and Endocrinology, Department of Molecular Medicine and Surgery, Karolinska University Hospital, Solna, Karolinska Institutet, Stockholm, Sweden
| | - Kerstin Brismar
- Rolf Luft Research Center for Diabetes and Endocrinology, Department of Molecular Medicine and Surgery, Karolinska University Hospital, Solna, Karolinska Institutet, Stockholm, Sweden
| | - Harvest F Gu
- Rolf Luft Research Center for Diabetes and Endocrinology, Department of Molecular Medicine and Surgery, Karolinska University Hospital, Solna, Karolinska Institutet, Stockholm, Sweden.
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Aydın AF, Develi-İş S, Doğru-Abbasoğlu S, Vural P, Ozderya A, Karadağ B, Uysal M. Polymorphisms of endothelin 1 (G5665T and T-1370G) and endothelin receptor type A (C+70G and G-231A) in Graves' disease. Int Immunopharmacol 2013; 18:198-202. [PMID: 24291390 DOI: 10.1016/j.intimp.2013.11.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 11/07/2013] [Accepted: 11/19/2013] [Indexed: 10/25/2022]
Abstract
PURPOSE Endothelin 1 (EDN1) is a strong angiogenic and mitogenic factor, playing a key role in hypervascularization, thyroid follicle cell hyperplasia, and lymphocyte infiltration in the thyroid gland of patients with Graves' disease (GD). EDN1 induces angiogenesis and mitogenesis via endothelin receptor type A (EDNRA). This study examined the possible association of EDN1 (G5665T and T-1370G) and EDNRA (C+70G and G-231A) single nucleotide polymorphisms (SNPs) with the occurrence of GD, and evaluates the relationship between genotypes and clinical/laboratory manifestations of GD. MATERIALS AND METHODS We analyzed genotype and allele distributions of EDN1 and EDNRA polymorphisms in 165 patients with GD and 181 healthy controls by real-time PCR combined with melting curve analysis. RESULTS No significant associations between GD and variant alleles of the studied polymorphisms were observed. However, the anti-thyroid peroxidase (anti-TPO) and anti-thyroglobulin (anti-TG) levels in EDN1 G5665T GG genotype were higher than those in T allele carriers (GT+TT) (p=0.001 and p=0.026, respectively). In addition, anti-TPO levels in EDN1 T-1370G wild-type homozygous patients were found to be higher than in mutant gene carrying patients (GT+GG) (p=0.006). The presence of EDNRA+70G allele was associated with 3.37-fold increased risk for development of ophthalmopathy in GD patients (p=0.009). CONCLUSION Although there were no associations between EDN1 (G5665T and T-1370G) and EDNRA (C+70G and G-231A) SNPs and susceptibility to GD, EDN1 G5665T and T-1370G polymorphisms were related to alterations of autoantibody production and EDNRA C+70G polymorphism is related with increased risk for ophthalmopathy in GD patients.
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Affiliation(s)
- A Fatih Aydın
- Istanbul University, Istanbul Faculty of Medicine, Department of Biochemistry, Istanbul, Turkey
| | - Seval Develi-İş
- Istanbul University, Istanbul Faculty of Medicine, Department of Biochemistry, Istanbul, Turkey
| | - Semra Doğru-Abbasoğlu
- Istanbul University, Istanbul Faculty of Medicine, Department of Biochemistry, Istanbul, Turkey
| | - Pervin Vural
- Istanbul University, Istanbul Faculty of Medicine, Department of Biochemistry, Istanbul, Turkey.
| | - Ayşenur Ozderya
- Şişli Etfal Education and Research Hospital, II. Internal Medicine Clinic, Department of Endocrinology, Şişli, 34387 Istanbul, Turkey
| | - Berrin Karadağ
- Şişli Etfal Education and Research Hospital, II. Internal Medicine Clinic, Department of Endocrinology, Şişli, 34387 Istanbul, Turkey
| | - Müjdat Uysal
- Istanbul University, Istanbul Faculty of Medicine, Department of Biochemistry, Istanbul, Turkey
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Papi A, Contoli M, Adcock IM, Bellettato C, Padovani A, Casolari P, Stanciu LA, Barnes PJ, Johnston SL, Ito K, Caramori G. Rhinovirus infection causes steroid resistance in airway epithelium through nuclear factor κB and c-Jun N-terminal kinase activation. J Allergy Clin Immunol 2013; 132:1075-1085.e6. [PMID: 23871663 DOI: 10.1016/j.jaci.2013.05.028] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 05/13/2013] [Accepted: 05/25/2013] [Indexed: 01/17/2023]
Abstract
BACKGROUND Although inhaled glucocorticoids are the mainstays of asthma treatment, they are poorly effective at treating and preventing virus-induced asthma exacerbations. The major viruses precipitating asthma exacerbations are rhinoviruses. OBJECTIVE We sought to evaluate whether rhinovirus infection interferes with the mechanisms of action of glucocorticoids. METHODS Cultured primary human bronchial or transformed (A549) respiratory epithelial cells were infected with rhinovirus 16 (RV-16) before dexamethasone exposure. Glucocorticoid receptor (GR) α nuclear translocation, glucocorticoid response element (GRE) binding, and transactivation/transrepression functional readouts were evaluated by using immunocytochemistry, Western blotting, DNA binding assays, real-time quantitative PCR, coimmunoprecipitation, and ELISA techniques. Specific inhibitors of c-Jun N-terminal kinase (JNK) and of IκB kinase (IKK) were used to investigate the involvement of intracellular signaling pathways. RESULTS RV-16 infection impaired dexamethasone-dependent (1) inhibition of IL-1β-induced CXCL8 release, (2) induction of mitogen-activated protein kinase phosphatase 1 gene expression, and (3) binding of GR to GREs in airway epithelial cells. This was associated with impaired GRα nuclear translocation, as assessed by means of both immunochemistry (54.0% ± 6.8% vs 24.7% ± 3.8% GR-positive nuclei after 10 nmol/L dexamethasone treatment in sham- or RV-16-infected cells, respectively; P < .01) and Western blotting. RV-16 infection induced nuclear factor κB activation and GRα phosphorylation, which were prevented by inhibitors of IKK2 and JNK, respectively. In rhinovirus-infected cells the combination of JNK and IKK2 inhibitors totally restored dexamethasone suppression of CXCL8 release, induction of mitogen-activated protein kinase phosphatase 1 gene expression, and GRα nuclear translocation. CONCLUSION RV-16 infection of human airway epithelium induces glucocorticoid resistance. Inhibition of RV-16-induced JNK and nuclear factor κB activation fully reversed rhinovirus impairment of both GRα nuclear translocation and the transactivation/transrepression activities of glucocorticoids.
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Qiu W, Pham K, James I, Nolan D, Castley A, Christiansen FT, Czarniak P, Luo Y, Wu J, Garlepp M, Wilton S, Carroll WM, Mastaglia FL, Kermode AG. The influence of non-HLA gene polymorphisms and interactions on disease risk in a Western Australian multiple sclerosis cohort. J Neuroimmunol 2013; 261:92-7. [PMID: 23726763 DOI: 10.1016/j.jneuroim.2013.04.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2012] [Revised: 03/17/2013] [Accepted: 04/30/2013] [Indexed: 01/01/2023]
Abstract
Non-Human Leukocyte Antigen (HLA) genes have concomitant, although modest, effects on multiple sclerosis (MS) susceptibility; however findings have varied in different populations. Here we present the results of an association study of 16 single nucleotide polymorphisms (SNPs) in 10 non-HLA genes (IL7R, IL2RA, CLEC-16A, TYK2, CD58, IRF5, STAT3, CTLA-4, APOE, ICAM-1) in a Western Australian cohort of 350 MS patients and 498 population control subjects. Our results indicate that in this population, SNPs in IL7R, TYK2, IRF5 and APOE have modifying effects on MS susceptibility. We also found evidence of interactive protective effects between polymorphisms in the IL7R/CD58, CLEC-16A/CTLA-4, and TYK2/IRF5 genes, which in some instances are restricted within HLA- or gender-defined groups.
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Affiliation(s)
- Wei Qiu
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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Du FT, Lin HF, Ding W. A Modified Perfusion Method to Improve the Quality of Procured Donor Pancreas in Rats. Gastroenterology Res 2012; 5:227-231. [PMID: 27785212 PMCID: PMC5074818 DOI: 10.4021/gr501e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/10/2012] [Indexed: 11/25/2022] Open
Abstract
Background In this animal study, we evaluated a modified pancreas perfusion method to improve the quality of harvested pancreas in rats. In this model, the portal vein was used as the outflow route during the pancreas perfusion. Methods Forty-eight male Wistar rats were randomly divided into study group and control group, with 24 rats in each group. In the study group, the portal vein was used as outflow of perfusion. While in the control group, the post-hepatic vein (right artrium) was used as perfusion outflow. UW solution was used as perfusion and preservation solution. Pancreas tissue samples were collected at 6, 10, and 14 hours after perfusion and cold preserved for histology and immunohistochemistry examination, P-selection (PS) and ICAM-1 were determined. Pancreas samples were also examined using electronic microscope for ultra-structures. Results Compared with the study group, in the pancreas of control group there were significant pathological impairments and cellular ultra-structural alterations observed by immunohistochemistry and electronic microscope, and these impairments aggravated with time. There were mild histological alterations in the pancreas of study group. Conclusions During the donor pancreas perfusion, the early opening of portal vein as the outflow is better than the opening of the post-hepatic vein for the preservation of donor graft pancreas and the reduction of tissue impairments.
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Affiliation(s)
- Fu Tian Du
- Department of Hepatobiliary Surgery, Weifang People's Hospital, Weifang 261041, China
| | - Hong Feng Lin
- Department of Hepatobiliary Surgery, Weifang People's Hospital, Weifang 261041, China
| | - Wei Ding
- Department of Hepatobiliary Surgery, Weifang People's Hospital, Weifang 261041, China
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Yan MX, Ren HB, Kou Y, Meng M, Li YQ. Involvement of nuclear factor kappa B in high-fat diet-related pancreatic fibrosis in rats. Gut Liver 2012; 6:381-7. [PMID: 22844569 PMCID: PMC3404178 DOI: 10.5009/gnl.2012.6.3.381] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 12/25/2011] [Accepted: 01/31/2012] [Indexed: 01/11/2023] Open
Abstract
Background/Aims High-fat diets contribute to pancreatic fibrogenesis, but the pathogenesis remains unclear. This study investigated the role of nuclear factor kappa B (NF-κB) in high-fat diet-induced pancreatic fibrosis in rats. Methods Male Wistar rats were fed a high-fat diet or standard normal chow for 20 weeks. Pancreatic fibrosis was determined by Sirius red staining. Immunohistochemical staining, reverse transcription-polymerase chain reaction and Western blotting were used to identify NF-κB-associated genes or protein expressions. Results Inflammation, fat deposition, pancreatic stellate cell activation and fibrosis were observed in the pancreases of the high-fat diet group. NF-κB subunit p65 (NF-κB/p65) expression was localized to the nucleus, and intercellular adhesion molecule 1 (ICAM-1) was over-expressed. Pancreatic gene expression levels of NF-κB/p65, ICAM-1 and tumor necrosis factor α were all elevated significantly in rats fed a high-fat diet compared with control rats. Western blotting also revealed significantly increased levels of ICAM-1 and nuclear NF-κB/p65 in rats fed high-fat diets comparison with control rats. Conclusions NF-κB is involved in high-fat diet-related pancreatic fibrosis.
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Affiliation(s)
- Ming-Xian Yan
- Department of Gastroenterology, Shandong Qianfoshan Hospital, Shandong University School of Medicine, Shandong, China
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Cho EJ, Park JI, An JN, Kim YS. Induction of donor-specific tolerance: is this achievable? Korean J Intern Med 2012; 27:114. [PMID: 22403511 PMCID: PMC3295979 DOI: 10.3904/kjim.2012.27.1.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 11/13/2011] [Accepted: 11/13/2011] [Indexed: 11/27/2022] Open
Affiliation(s)
- Eun Jin Cho
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Ji In Park
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Jung Nam An
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Yon Su Kim
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
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