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Simonetti A, Restaino A, Bernardi E, Ferrara OM, Margoni S, D’Onofrio AM, Ranieri F, Janiri D, Galluzzo V, Tosato M, Kotzalidis GD, Landi F, Sani G. Effect of Anti-Interleukin-6 Agents on Psychopathology in a Sample of Patients with Post-COVID-19 Syndrome: An Observational Study. Brain Sci 2024; 14:47. [PMID: 38248262 PMCID: PMC10813526 DOI: 10.3390/brainsci14010047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 12/23/2023] [Accepted: 12/26/2023] [Indexed: 01/23/2024] Open
Abstract
Interleukin 6 (IL-6) receptor inhibitors tocilizumab and sarilumab have recently been approved for severe coronavirus disease 2019 (COVID-19). They also affect mood, even though their effect on the post-COVID-19 syndrome-related psychopathology still has to be investigated. The aim of this study was to investigate their effect on psychopathology in a sample of patients with post-COVID-19 syndrome. We included 246 patients (34% female, 66% male) aged 18-75 years who had been hospitalized for COVID. Patients were split into those who received anti-IL-6 receptor agents (Anti-IL-6-R, N = 88) and those who did not (Ctrl, N = 158). The former group was further split into those receiving tocilizumab (TOC, N = 67) and those receiving sarilumab (SAR, N = 21). Groups were compared based on clinical characteristics before and during COVID-19 as well as on physical and psychiatric symptoms after COVID-19. Ctrl had less psychiatric and physical symptoms during hospitalization and more post-COVID-19 diarrhea, headache, cough, and dyspnea upon exertion than those receiving IL-6-receptor inhibitors. Ctrl also showed greater difficulties in emotion regulation. These differences were driven by TOC vs. Ctrl, whereas differences between SAR and Ctrl or TOC did not reach significance. IL-6 receptor inhibitors are related to a lower post-COVID-19 illness burden and seem to be effective in emotion regulation. Further research is needed to confirm these findings.
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Affiliation(s)
- Alessio Simonetti
- Department of Neuroscience, Section of Psychiatry, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy; (D.J.); (G.S.)
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, 1977 Butler Blvd., Houston, TX 77030, USA
| | - Antonio Restaino
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
| | - Evelina Bernardi
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
| | - Ottavia Marianna Ferrara
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
| | - Stella Margoni
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
| | - Antonio Maria D’Onofrio
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
| | - Federica Ranieri
- Department of Psychiatry, University of Campania Luigi Vanvitelli, 80138 Naples, Italy;
| | - Delfina Janiri
- Department of Neuroscience, Section of Psychiatry, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy; (D.J.); (G.S.)
| | - Vincenzo Galluzzo
- Department of Geriatrics, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (V.G.); (M.T.); (F.L.)
| | - Matteo Tosato
- Department of Geriatrics, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (V.G.); (M.T.); (F.L.)
- NESMOS (Neurosciences, Mental Health, and Sensory Organs) Department, Faculty of Medicine and Psychology, Sant’Andrea Hospital, Sapienza Università di Roma, Via di Grottarossa 1035-1039, 00189 Rome, Italy
| | - Georgios D. Kotzalidis
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
- NESMOS (Neurosciences, Mental Health, and Sensory Organs) Department, Faculty of Medicine and Psychology, Sant’Andrea Hospital, Sapienza Università di Roma, Via di Grottarossa 1035-1039, 00189 Rome, Italy
| | - Francesco Landi
- Department of Geriatrics, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (V.G.); (M.T.); (F.L.)
- Department of Geriatrics, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Gabriele Sani
- Department of Neuroscience, Section of Psychiatry, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy; (D.J.); (G.S.)
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
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Dey D, Mondal P, Moitra S, Saha GK, Podder S. Association of Interleukin 6 and Interleukin 8 genes polymorphisms with house dust mite-induced nasal-bronchial allergy in a sample of Indian patients. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2022. [DOI: 10.1186/s43042-022-00348-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Genetic background of nasal-bronchial allergy (NBA) is well documented. House Dust Mites (HDMs) are reported to elicit NBA symptoms. Susceptibility to HDM sensitization varies considerably from person to person. Interleukin 6 (IL 6) and Interleukin 8 (IL 8) are studied previously for genetic association with several diseases. To the best of our knowledge, the genetic association of HDM-induced NBA has not been largely reported from India. The aim of our present study was to evaluate any possible association of IL 6 and IL 8 gene polymorphisms with HDM-induced NBA in an Indian population.
Methods
IL 6 (− 572G/C, − 597G/A) and IL 8 polymorphisms (− 251A/T, + 781C/T) were analyzed in a HDM-sensitized group (N = 372) and a control group (N = 110). Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR–RFLP) based genotyping was done. Chi-square test and Fisher’s exact tests were applied for statistical analysis.
Results
IL 6 − 597G/A and IL 8 + 781C/T were not associated with HDM-sensitization, while IL 6 − 72G/C and IL 8 − 51A/T showed significant associations in terms of both genotype and allele frequencies. For both the SNPs, minor allele frequencies were significantly higher in the patients compared to the control. Moreover, IL 6 -572G/C and IL 8 -251A/T were found to be strongly linked with HDM sensitization and severity.
Conclusion
This is probably the pioneer study to describe the association of IL 6 and IL 8 polymorphisms with HDM sensitization in any Indian population. The results suggested that IL 6 -572G/C and IL 8 -251A/T may exert a risk of HDM sensitization leading to NBA.
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Karcıoğlu Batur L, Savaş S, Girgin E, Hekim N. Association of the IL-6R gene polymorphic variant rs2228145(C>A) with IL-6 gene polymorphisms in a healthy cohort of Turkish population. Genes Immun 2022; 23:118-122. [PMID: 35338260 PMCID: PMC8956139 DOI: 10.1038/s41435-022-00167-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 03/03/2022] [Accepted: 03/09/2022] [Indexed: 11/22/2022]
Abstract
The main aim of this study was to investigate the relationship of the carriership of rs2228145 allelic variations of IL-6R with two other allelic variations in IL-6 gene at rs1800795 and rs1800796 loci and with the laboratory data of a healthy cohort of the Turkish population. The data of 121 healthy Turkish subjects (aged 12–84 years) including the past diseases, comorbidities were collected. The laboratory parameters were compared by the frequency of alleles of rs2228145 (C>A). The possible association of polymorphism at rs2228145 locus with the age, gender, and body mass index (BMI) and the frequencies of alleles of rs1800795 and rs1800796 polymorphisms were evaluated. The majority of the subjects had allele A at rs2228145 locus and allele G at rs1800796 locus. The number of white blood cells, platelets, neutrophils and monocytes were significantly higher in the subjects with allele C than those with allele A at rs2228145 locus (P < 0.05). The concentrations of total and direct bilirubin, iron, Sex Hormone Binding Globulin (SHBG) and folic acid of the subjects with allele C were significantly lower than those with allele A (P < 0.05). The uric acid and fasting insulin levels were higher in the subjects with allele C compared with those allele A (P = 0.04). The diversities of the hematological parameters, laboratory findings of liver function tests and renal panel and hormone levels may be explained by the variants of rs2228145 locus at IL-6R gene among healthy Turkish individuals.
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Affiliation(s)
- Lutfiye Karcıoğlu Batur
- Department of Molecular Biology and Genetics, Faculty of Engineering and Natural Sciences, Biruni University, Istanbul, Turkey.
| | | | | | - Nezih Hekim
- Department of Molecular Biology and Genetics, Faculty of Engineering and Natural Sciences, Biruni University, Istanbul, Turkey
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Trovato M, Sciacchitano S, Facciolà A, Valenti A, Visalli G, Di Pietro A. Interleukin‑6 signalling as a valuable cornerstone for molecular medicine (Review). Int J Mol Med 2021; 47:107. [PMID: 33907833 PMCID: PMC8057292 DOI: 10.3892/ijmm.2021.4940] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 03/23/2021] [Indexed: 12/14/2022] Open
Abstract
The biological abilities of interleukin-6 (IL-6) have been under investigation for nearly 40 years. IL-6 works through an interaction with the complex peptide IL-6 receptor (IL-6R). IL-6 is built with four α-chain nanostructures, while two different chains, IL-6Rα (gp80) and gp130/IL6β (gp130), are included in IL-6R. The three-dimensional shapes of the six chains composing the IL-6/IL-6R complex are the basis for the nanomolecular roles of IL-6 signalling. Genes, pseudogenes and competitive endogenous RNAs of IL-6 have been identified. In the present review, the roles played by miRNA in the post-transcriptional regulation of IL-6 expression are evaluated. mRNAs are absorbed via the 'sponge' effect to dynamically balance mRNA levels and this has been assessed with regard to IL-6 transcription efficiency. According to current knowledge on molecular and nanomolecular structures involved in active IL-6 signalling, two different IL-6 models have been proposed. IL-6 mainly has functions in inflammatory processes, as well as in cognitive activities. Furthermore, the abnormal production of IL-6 has been found in patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2; also known as COVID-19). In the present review, both inflammatory and cognitive IL-6 models were analysed by evaluating the cytological and histological locations of IL-6 signalling. The goal of this review was to illustrate the roles of the classic and trans-signalling IL-6 pathways in endocrine glands such as the thyroid and in the central nervous system. Specifically, autoimmune thyroid diseases, disorders of cognitive processes and SARS-CoV-2 virus infection have been examined to determine the contribution of IL-6 to these disease states.
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Affiliation(s)
- Maria Trovato
- Department of Clinical and Experimental Medicine, University Hospital, I‑98125 Messina, Italy
| | | | - Alessio Facciolà
- Department of Clinical and Experimental Medicine, University Hospital, I‑98125 Messina, Italy
| | - Andrea Valenti
- Department of Clinical and Experimental Medicine, University Hospital, I‑98125 Messina, Italy
| | - Giuseppa Visalli
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Policlinico Universitario, I‑98125 Messina, Italy
| | - Angela Di Pietro
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Policlinico Universitario, I‑98125 Messina, Italy
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Ding HG, Yin YW, Liu SL. Interleukin-6 gene -572 G > C polymorphism and myocardial infarction risk. Open Med (Wars) 2020; 15:376-383. [PMID: 33335998 PMCID: PMC7712306 DOI: 10.1515/med-2020-0407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 12/27/2019] [Accepted: 02/20/2020] [Indexed: 11/15/2022] Open
Abstract
Introduction The association between interleukin-6 (IL-6) gene −572 G^C polymorphism and myocardial infarction (MI) risk has not been established. We adopted this meta-analysis for further insight into the case–control studies. Materials and methods To investigate the genetic association, we searched multiple databases, including Web of Science, EMbase, CBM disc, PubMed and CNKI. Also, we manually identified the searched references. All the statistical analyses were conducted using Stata 11.0. Results A total of five studies were identified, involving 2,526 MI cases and 3,027 controls. The results revealed a significant association between IL-6 gene −572 G^C polymorphism and MI, implying that the IL-6 gene −572 C allele may be a protective factor for MI (for C allele vs K allele: OR = 0.85, 95% CI = 0.73–0.99, p = 0.041; for C/C vs G/G: OR = 0.55, 95% CI = 0.31–0.98, p = 0.044; for C/C vs G/C + G/G: OR = 0.60, 95% CI = 0.41–0.89, p = 0.011). However, in the subgroup analysis with regard to ethnicity, no significant correlation was identified between IL-6 gene −572 G^C polymorphism and MI among Europeans. Conclusion The IL-6 gene −572 C allele may be a protective factor for MI. Future studies involving larger sample bases are still recommended.
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Affiliation(s)
- He-Guo Ding
- Department of Respiration, Huzhou 3rd Hospital, 2088 Tiaoxi Road, Huzhou, Zhejiang 313000, China
| | - Yan-Wei Yin
- Department of Emergency, Chinese PLA Air Force General Hospital, Beijing, China
| | - Sun-Lin Liu
- Department of Respiration, Huzhou 3rd Hospital, 2088 Tiaoxi Road, Huzhou, Zhejiang 313000, China
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Akinyemi R, Arnett DK, Tiwari HK, Ovbiagele B, Sarfo F, Srinivasasainagendra V, Irvin MR, Adeoye A, Perry RT, Akpalu A, Jenkins C, Owolabi L, Obiako R, Wahab K, Sanya E, Komolafe M, Fawale M, Adebayo P, Osaigbovo G, Sunmonu T, Olowoyo P, Chukwuonye I, Obiabo Y, Akpa O, Melikam S, Saulson R, Kalaria R, Ogunniyi A, Owolabi M. Interleukin-6 (IL-6) rs1800796 and cyclin dependent kinase inhibitor (CDKN2A/CDKN2B) rs2383207 are associated with ischemic stroke in indigenous West African Men. J Neurol Sci 2017; 379:229-235. [PMID: 28716248 DOI: 10.1016/j.jns.2017.05.046] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 05/09/2017] [Accepted: 05/22/2017] [Indexed: 12/24/2022]
Abstract
BACKGROUND Inherited genetic variations offer a possible explanation for the observed peculiarities of stroke in sub - Saharan African populations. Interleukin-6 polymorphisms have been previously associated with ischemic stroke in some non-African populations. AIM Herein we investigated, for the first time, the association of genetic polymorphisms of IL-6, CDKN2A- CDKN2B and other genes with ischemic stroke among indigenous West African participants in the Stroke Investigative Research and Education Network (SIREN) Study. METHODS Twenty-three previously identified single nucleotide polymorphisms (SNPs) in 14 genes of relevance to the neurobiology of ischemic stroke were investigated. Logistic regression models adjusting for known cardiovascular disease risk factors were constructed to assess the associations of the 23 SNPs in rigorously phenotyped cases (N=429) of ischemic stroke (Men=198; Women=231) and stroke- free (N=483) controls (Men=236; Women=247). RESULTS Interleukin-6 (IL6) rs1800796 (C minor allele; frequency: West Africans=8.6%) was significantly associated with ischemic stroke in men (OR=2.006, 95% CI=[1.065, 3.777], p=0.031) with hypertension in the model but not in women. In addition, rs2383207 in CDKN2A/CDKN2B (minor allele A with frequency: West Africans=1.7%) was also associated with ischemic stroke in men (OR=2.550, 95% CI=[1.027, 6.331], p=0.044) with primary covariates in the model, but not in women. Polymorphisms in other genes did not show significant association with ischemic stroke. CONCLUSION Polymorphisms rs1800796 in IL6 gene and rs2383207 in CDKN2A/CDKN2B gene have significant associations with ischemic stroke in indigenous West African men. CDKN2A/CDKN2B SNP rs2383207 is independently associated with ischemic stroke in indigenous West African men. Further research should focus on the contributions of inflammatory genes and other genetic polymorphisms, as well as the influence of sex on the neurobiology of stroke in people of African ancestry.
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Affiliation(s)
- Rufus Akinyemi
- University of Ibadan, Ibadan, Nigeria; Federal Medical Centre Abeokuta, Nigeria
| | | | | | | | - Fred Sarfo
- Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | | | | | | | | | | | | | | | | | | | | | | | - Michael Fawale
- Obafemi Awolowo University Teaching Hospital, Ile-Ife, Nigeria
| | - Philip Adebayo
- Ladoke Akintola University Teaching Hospital, Ogbomosho, Nigeria
| | | | | | - Paul Olowoyo
- Federal University Teaching Hospital Ido-Ekiti, Nigeria
| | | | - Yahaya Obiabo
- Delta State University Teaching Hospital, Oghara, Nigeria
| | | | | | | | - Raj Kalaria
- Newcastle University, Newcastle upon Tyne, UK
| | | | - Mayowa Owolabi
- University of Ibadan, Ibadan, Nigeria; WFNR-Blossom Specialist Medical Center Ibadan, Nigeria
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Luo Y, Zheng SG. Hall of Fame among Pro-inflammatory Cytokines: Interleukin-6 Gene and Its Transcriptional Regulation Mechanisms. Front Immunol 2016; 7:604. [PMID: 28066415 PMCID: PMC5165036 DOI: 10.3389/fimmu.2016.00604] [Citation(s) in RCA: 186] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 12/01/2016] [Indexed: 12/27/2022] Open
Abstract
Pro-inflammatory cytokines that are generated by immune system cells and mediate many kinds of immune responses are kinds of endogenous polypeptides. They are also the effectors of the autoimmune system. It is generally accepted that interleukin (IL)-4, IL-6, IL-9, IL-17, and tumor necrosis factor-α are pro-inflammatory cytokines; however, IL-6 becomes a protagonist among them since it predominately induces pro-inflammatory signaling and regulates massive cellular processes. It has been ascertained that IL-6 is associated with a large number of diseases with inflammatory background, such as anemia of chronic diseases, angiogenesis acute-phase response, bone metabolism, cartilage metabolism, and multiple cancers. Despite great progress in the relative field, the targeted regulation of IL-6 response for therapeutic benefits remains incompletely to be understood. Therefore, it is conceivable that understanding mechanisms of IL-6 from the perspective of gene regulation can better facilitate to determine the pathogenesis of the disease, providing more solid scientific basis for clinical treatment translation. In this review, we summarize the candidate genes that have been implicated in clinical target therapy from the perspective of gene transcription regulation.
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Affiliation(s)
- Yang Luo
- Department of Clinical Immunology of the Third Affiliated Hospital at the Sun Yat-sen University, Guangzhou, China; Division of Rheumatology, Department of Medicine at Penn State Hershey College of Medicine, Hershey, PA, USA
| | - Song Guo Zheng
- Department of Clinical Immunology of the Third Affiliated Hospital at the Sun Yat-sen University, Guangzhou, China; Division of Rheumatology, Department of Medicine at Penn State Hershey College of Medicine, Hershey, PA, USA
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Kumar P, Misra S, Kumar Yadav A, Kumar A, Sriwastva M, Prasad K. Relationship between Interleukin-6 (-174G/C and -572C/G) Promoter Gene Polymorphisms and Risk of Intracerebral Hemorrhage: A Meta-Analysis. Pulse (Basel) 2016; 4:61-68. [PMID: 27752477 DOI: 10.1159/000447677] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 06/15/2016] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Polymorphisms of -174G/C and -572C/G in the Interleukin-6 (IL-6) promoter gene can affect both transcription and secretion of IL-6 and may be involved in the inflammatory mechanisms in early and delayed phases after intracerebral hemorrhage (ICH). The role of these polymorphisms remains unclear for the pathogenesis of ICH. METHODS PubMed, EMBASE, MEDLINE and Google Scholar searches were conducted from January 1, 1950 to February 29, 2016 and were supplemented with relevant articles identified in the references. The following search terms were used: ('interleukin-6' or 'IL-6') and ('genetic polymorphism' or 'single nucleotide polymorphisms' or 'SNP') and ('intracerebral hemorrhage' or 'ICH') and ('hemorrhagic stroke' or 'HS'). Fixed or random effects models were used to estimate the pooled odds ratios and 95% confidence intervals. Begg's funnel plot was used to assess the potential for publication bias. RESULTS In our meta-analysis, three case-control studies involving 446 ICH cases and 2,322 controls were included. No significant association was observed for the IL-6 (-174G/C and -572C/G) gene polymorphisms with the risk of ICH under dominant, recessive and allelic models. CONCLUSION Our meta-analysis suggests that IL-6 gene polymorphisms are not associated with the risk of ICH. However, caution must be taken while considering the results of our meta-analysis due to the presence of small sample size. Our results cannot be extrapolated to represent the effect of entire IL-6 genetic polymorphism on stroke patients worldwide. Therefore, further well-designed studies with large sample size are warranted to validate our findings and provide a profound conclusion.
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Affiliation(s)
- Pradeep Kumar
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Shubham Misra
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Arun Kumar Yadav
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Amit Kumar
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Mukesh Sriwastva
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Kameshwar Prasad
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
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Gupta MK, Singh R, Banerjee M. Cytokine gene polymorphisms and their association with cervical cancer: A North Indian study. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2016. [DOI: 10.1016/j.ejmhg.2015.10.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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Kumar P, Kumar A, Sagar R, Misra S, Faruq M, Suroliya V, Vivekanandhan S, Kumar Srivastava A, Prasad K. Association between interleukin-6 (G174C and C572G) promoter gene polymorphisms and risk of ischemic stroke in North Indian population: a case-control study. Neurol Res 2016; 38:69-74. [PMID: 26883819 DOI: 10.1080/01616412.2015.1133028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
BACKGROUND Polymorphisms of G174C and C572G in the interleukin-6 (IL-6) promoter gene can affect both transcription and secretion of IL-6 and may be involved in inflammation related to and pathogenesis of ischemic stroke (IS). Whether these IL-6 gene polymorphisms are risk factors for IS or not, remains controversial. OBJECTIVE The aim of this study was to determine the association between IL-6 G174C and C572G gene polymorphisms and susceptibility to ischemic stroke in North Indian Population. METHODS Two hundred and fifty IS patients and 250 age- and sex-matched controls were studied. Genotyping was performed using SNaPshot method. Stroke was classified using Trial of Org 10172 in acute stroke treatment classification. Conditional logistic regression analysis was used to calculate the strength of association between IL-6 (G174C and C572G) polymorphisms and risk of IS. RESULTS Hypertension, diabetes, dyslipidemia, alcohol, smoking, family history of stroke, sedentary life style and low socioeconomic status were found to be associated with the risk of IS. Conditional logistic regression analysis showed a significant association of IL-6 G174C with the risk of IS under dominant model (OR, 1.61; 95%CI, 1.0-2.4; P value 0.02) and allelic model (OR, 1.5; 95%CI, 1.0-2.1; P value 0.02). For IL-6 C572G, multivariate adjusted analysis showed a significant association with the risk of IS under dominant model for overall IS (OR, 1.81; 95%CI, 1.04-3.15; P value 0.03) and small vessel disease subtype of IS (OR, 2.8; 95%CI, 1.3-6.0; P value 0.006). CONCLUSION Our results suggest that IL-6 (G174C) polymorphism is significantly associated with the risk of IS in North Indian population. However, IL-6 (C572G) polymorphism is found significantly associated with the risk of IS after adjusting the demographic and risk factors variables. Prospective studies with large sample size are required for independent validation. Our findings could be helpful in identifying individuals at increased risk for developing IS.
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Affiliation(s)
- Pradeep Kumar
- a Department of Neurology , All India Institute of Medical Sciences , New Delhi , India
| | - Amit Kumar
- a Department of Neurology , All India Institute of Medical Sciences , New Delhi , India
| | - Ram Sagar
- a Department of Neurology , All India Institute of Medical Sciences , New Delhi , India
| | - Shubham Misra
- a Department of Neurology , All India Institute of Medical Sciences , New Delhi , India
| | - Mohammad Faruq
- b Institutes of Genomics and Integrative Biology , New Delhi , India
| | - Varun Suroliya
- a Department of Neurology , All India Institute of Medical Sciences , New Delhi , India
| | - Subiah Vivekanandhan
- c Department of Neurobiochemistry , All India Institute of Medical Sciences , New Delhi , India
| | | | - Kameshwar Prasad
- a Department of Neurology , All India Institute of Medical Sciences , New Delhi , India
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Relationships between IL-6 gene polymorphism, low BMD and periodontitis in postmenopausal women. Arch Oral Biol 2015; 60:533-9. [DOI: 10.1016/j.archoralbio.2014.12.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 10/24/2014] [Accepted: 12/05/2014] [Indexed: 11/21/2022]
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Kumar P, Yadav AK, Kumar A, Sagar R, Pandit AK, Prasad K. Association between Interleukin-6 (G174C and G572C) promoter gene polymorphisms and risk of ischaemic stroke: A meta-analysis. Ann Neurosci 2015; 22:61-9. [PMID: 26130909 PMCID: PMC4480254 DOI: 10.5214/ans.0972.7531.220203] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 01/05/2015] [Accepted: 02/11/2015] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Interleukin-6 (IL-6), as one of the most typical pro-inflammatory and immunoregulatory cytokines, is believed to be associated with the genesis and maintenance of inflammatory response. Genetic association studies (GAS) that have investigated the association between Interleukin 6 (G174C and G572C) promoter gene polymorphisms and susceptibility to ischemic stroke (IS) which have produced contradictory and unconvincing results. PURPOSE The aim of this meta-analysis is to provide a relatively comprehensive account of the association of IL-6 (G174C and G572C) polymorphisms with susceptibility to IS. METHODS A literature search was conducted using electronic database PubMed, Medline, and Trip database for all case-control studies investigating for association of IL-6 genetic polymorphisms with ischemic stroke published till August 30, 2014. The following combinations of main keywords were used: ('Interleukin-6' or 'IL-6') and ('ischaemic stroke or 'cerebral infarction' or 'IS') and ('genetic polymorphism' or 'single nucleotide polymorphisms' or 'SNP'). Pooled Odds ratios (ORs) and 95% confidence intervals (CIs) were determined for IL-6 gene-disease association. Meta-analysis was carried out using Revman 5.3 software. RESULTS 16 case-control studies involving a total of 3,317 IS patients and 3,432 healthy controls for G174C polymorphism and 3 case-control studies with a total of 2,001 IS patients and 2,027 healthy controls for G572C IL-6 gene polymorphisms were included in a meta-analysis. For IL-6 G174C gene polymorphisms, no significant association was observed under dominant [GC + CC vs. GG: OR = 1.01, 95% CI: 0.77-1.34, P = 0. 92], recessive [CC vs. GG + GC: OR = 0.82, 95% CI: 0.40-1.70, P = 0. 59] and allelic model [C vs. G Allele: OR = 0.99, 95% CI: 0.74-1.31, P = 0. 93]. For IL-6 G572C, no significant association was observed under dominant [CC vs. GG + GC: OR = 0.99, 95% CI: 0.57-1.71, P = 0. 97], recessive [CC vs. GG + GC: OR = 0.93, 95% CI: 0.60-1.45, P = 0. 75] and allelic model [C vs. G Allele: OR = 0.95, 95% CI: 0.66-1.36, P = 0. 76]. CONCLUSION This meta-analysis shows that IL-6 (G174C) and IL-6 (G572C) gene polymorphisms may not be associated with an increased susceptibility to IS. Further studies are required for confirmatory results.
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Affiliation(s)
- Pradeep Kumar
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, INDIA
| | - Arun K Yadav
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, INDIA
| | - Amit Kumar
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, INDIA
| | - Ram Sagar
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, INDIA
| | - Awadh K Pandit
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, INDIA
| | - Kameshwar Prasad
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, INDIA
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Interleukin-6 signal transduction and its role in hepatic lipid metabolic disorders. Cytokine 2014; 66:133-42. [PMID: 24491813 DOI: 10.1016/j.cyto.2013.12.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2013] [Revised: 12/14/2013] [Accepted: 12/30/2013] [Indexed: 01/12/2023]
Abstract
Hepatic lipid dysregulation can lead to spectrum of metabolic disease conditions including metabolic syndrome (MS), fatty liver and diabetes. Liver lipids are regulated by a complex set of extra-hepatic and intra-hepatic factors including cellular cross-talk with variety of cells, inducing various cytokines. Interleukin 6(IL-6) is a pleiotropic cytokine that exerts both pro-inflammatory and anti-inflammatory effects on hepatic system through either JNK/STAT or ERK/MAPK signaling. Although, IL-6 has shown to protect the liver from fat storage in both rodent and human models and various IL-6(-/-) studies have supported this notion yet a question remains over its deleterious pro-inflammatory effects on hepatocytes. IL-6 ability to produce reactive oxygen species (ROS) and subsequently disturb the hepatic lipid balance has created a conundrum. Furthermore, IL-6 has shown to behave differently under different disease states within hepatocytes and hence, modulating the hepatic lipids accordingly. This review deals with the role of IL-6 on hepatic lipid metabolism and analyzes various data presented on this topic.
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Low prevalence of interleukin-6 haplotypes associated with a decreased risk of type 2 diabetes in Mexican subjects with a family history of type 2 diabetes. Arch Med Res 2013; 44:529-34. [PMID: 24051035 DOI: 10.1016/j.arcmed.2013.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 08/26/2013] [Indexed: 01/02/2023]
Abstract
BACKGROUND AND AIMS There is evidence that family history of type 2 diabetes (FHT2D) and single nucleotide polymorphisms (SNP) on the IL-6 gene promoter region are separately associated with the risk of developing type 2 diabetes. However the relationship between adult Mexican subjects with FHT2D and genotypes/haplotypes for IL-6 gene has not been explored. The aim of the present work was to study the prevalence of IL-6 -598G>A-572G>C-174G>C haplotypes among subjects with FHT2D and to determine whether their presence influences the relationship between FHT2D and risk factors for diabetes. METHODS Two hundred fifty eight nondiabetic subjects participated in this study; 153 with and 105 without FHT2D. Polymerase chain reaction-restriction fragment-length polymorphism (PCR-RFLP) was used for genotyping. Logistic regression analysis was employed to assess the impact of IL-6 haplotypes on FHT2D per se and hyperinsulinemia and insulin resistance as risk factors for diabetes. RESULTS Subjects with FHT2D showed a higher prevalence of hyperinsulinemia and insulin resistance (IR) than those without FHT2D (14.4 vs. 5.7%, p = 0.029, and 14.2 vs. 7.0% p = 0.050, respectively). Lower prevalence of -598 -572-174 (AGC)-haplotype (19%) in subjects with FHT2D was observed as well as a lower prevalence of hyperinsulinemia and IR among AGC haplotype carriers (12 and 14%, respectively). The relationship between FHT2D and IR was modified by the presence of AGC haplotype (from OR, 2.70; 95% CI, 0.99-7.36; p = 0.050 OR, 30.08; 95% CI, 0.58-1,568.06; p = 0.092). CONCLUSIONS IL-6 -598/-572/-174 (AGC) haplotype has a low prevalence among first-degree relatives of subjects with type 2 diabetes. Our results suggest that this haplotype is associated with decreased risk of type 2 diabetes in Mexican subjects with FHT2D.
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Akdis M, Burgler S, Crameri R, Eiwegger T, Fujita H, Gomez E, Klunker S, Meyer N, O'Mahony L, Palomares O, Rhyner C, Ouaked N, Quaked N, Schaffartzik A, Van De Veen W, Zeller S, Zimmermann M, Akdis CA. Interleukins, from 1 to 37, and interferon-γ: receptors, functions, and roles in diseases. J Allergy Clin Immunol 2011; 127:701-21.e1-70. [PMID: 21377040 DOI: 10.1016/j.jaci.2010.11.050] [Citation(s) in RCA: 518] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Revised: 11/11/2010] [Accepted: 11/12/2010] [Indexed: 12/17/2022]
Abstract
Advancing our understanding of mechanisms of immune regulation in allergy, asthma, autoimmune diseases, tumor development, organ transplantation, and chronic infections could lead to effective and targeted therapies. Subsets of immune and inflammatory cells interact via ILs and IFNs; reciprocal regulation and counter balance among T(h) and regulatory T cells, as well as subsets of B cells, offer opportunities for immune interventions. Here, we review current knowledge about ILs 1 to 37 and IFN-γ. Our understanding of the effects of ILs has greatly increased since the discoveries of monocyte IL (called IL-1) and lymphocyte IL (called IL-2); more than 40 cytokines are now designated as ILs. Studies of transgenic or knockout mice with altered expression of these cytokines or their receptors and analyses of mutations and polymorphisms in human genes that encode these products have provided important information about IL and IFN functions. We discuss their signaling pathways, cellular sources, targets, roles in immune regulation and cellular networks, roles in allergy and asthma, and roles in defense against infections.
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Affiliation(s)
- Mübeccel Akdis
- Swiss Institute of Allergy and Asthma Research, University of Zurich, Davos, Switzerland.
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Coker A, Arman A, Soylu O, Tezel T, Yildirim A. Lack of association between IL-1 and IL-6 gene polymorphisms and myocardial infarction in Turkish population. Int J Immunogenet 2011; 38:201-8. [PMID: 21199393 DOI: 10.1111/j.1744-313x.2010.00988.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Inflammation and genetics play a key role in the pathogenesis of atherosclerosis and its clinical result myocardial infarction (MI). Proinflammatory cytokines, IL-1 and IL-6, have been shown to play essential roles in developmental stages of coronary artery plaque formation. The aim of this study was to determine the association between IL-1 [IL-1RN, IL-1β (-511, +3953)], IL-6 [-174, -572, -597] gene polymorphisms and MI in Turkish population. A total of 402 people were participated; 235 healthy control subjects and 167 MI patients (MI<40, n: 72; MI>40, n: 95). Polymerase chain reaction (PCR) was used to determine the genotype of IL-1RN, whereas the genotypes of IL-1β (-511, +3953) and IL-6 (-174, -572, -597) were determined using PCR followed with restriction digestion analysis. There was no significant difference between MI and controls for IL-1RN, IL-1β-511, +3953 (P: 0.875, 0.608, 0.442) and IL-6 -174, -572, -597 (P: 0.977, 0.632, 0.584) gene polymorphisms. Lack of association was observed between MI at younger age (MI<40) and either IL-1RN VNTR, IL-1β-511, +3953 (P: 0.878, 0.732, 0.978) or IL-6 -174, -572, -597 (P: 0.313, 0.654, 0.552) gene polymorphisms. This study demonstrated that there was not any association between IL-1, IL-6 gene variants and MI in Turkish population. In addition, IL-1 and IL-6 gene polymorphisms did not affect MI at younger age (MI<40) or older age (MI>40). Thus, IL-1 and IL-6 single nucleotide polymorphisms may not be a risk factor for susceptibility to MI in Turkish population.
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Affiliation(s)
- A Coker
- The Faculty of Science and Letters, The Department of Molecular Biology and Genetics, Atakoy Campus,Istanbul Kultur University, Istanbul, Turkey.
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The effects of genetic polymorphisms of IL-6, IL-8, and IL-10 on Helicobacter pylori-induced gastroduodenal diseases in Korea. J Clin Gastroenterol 2009; 43:420-8. [PMID: 19077731 DOI: 10.1097/mcg.0b013e318178d1d3] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND The genes that encode proinflammatory and anti-inflammatory cytokines are good candidate markers of host susceptibility to gastroduodenal disease. The present study was performed to evaluate whether or not the genetic polymorphisms of IL-6, IL-8, and IL-10 are associated with gastroduodenal disease in the Korean population. METHODS This study enrolled 1187 patients, including controls, those with gastric cancer (GC), benign gastric ulcer (BGU), and duodenal ulcer patients. Six polymorphisms were genotyped, 3 of IL-10 (at -592, -819, and -1082), 1 of IL-8 (at -251), and 2 of IL-6 (at -174 and -572), by polymerase chain reaction-restriction fragment length polymorphism analysis. RESULTS The frequency of IL-10-1082 G carriers was higher in cases of a diffuse type GC [odds ratio (OR) 1.8, 95% confidence interval (CI): 1.0-3.1, P=0.041] or BGU (OR 1.6, 95% CI: 1.0-2.5, P=0.040), than in the control group regardless of Helicobacter pylori infection. The IL-8-251 A/A genotype was more common in H. pylori-positive patients with GC (OR 2.0, 95% CI: 1.2-3.6, P=0.013) or BGU (OR 2.7, 95% CI: 1.5-4.8, P=0.001) than in H. pylori-positive controls. In addition, the frequencies of IL-6-572 G/G (OR 0.3, 95% CI: 0.1-0.9, P=0.027) and of G carriers (OR 0.5, 95% CI: 0.4-0.8, P=0.003) were lower in H. pylori-positive duodenal ulcer patients than in H. pylori-positive controls. IL-10-592 C/C (OR 0.4, 95% CI: 0.2-0.9, P=0.028) was an independent factor associated with a decreased risk of the intestinal type of GC by multivariate analysis. Furthermore, a synergistic effect was observed between IL-10-592 A/A and IL-8-251 A/A with respect to the development of GC or BGU. CONCLUSIONS These results suggest that the genetic polymorphisms of these 3 inflammation-related cytokines, IL-10, IL-8, and IL-6, are associated with the development of H. pylori-associated gastroduodenal disease.
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Mocchegiani E, Malavolta M. Zinc-gene interaction related to inflammatory/immune response in ageing. GENES & NUTRITION 2008; 3:61-75. [PMID: 18850188 PMCID: PMC2467449 DOI: 10.1007/s12263-008-0085-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The pivotal role played by zinc-gene interaction in affecting some relevant cytokines (IL-6 and TNF-alpha) and heat shock proteins (HSP70-2) in ageing, successful ageing (nonagenarians) and the most common age-related diseases, such as atherosclerosis and infections, is now recognized. The polymorphisms of genes codifying proteins related to the inflammation are predictive on one hand in longevity, on the other hand they are associated with atherosclerosis or severe infections. Since the health life-span has a strong genetic component, which in turn also affected by nutritional factors like zinc, the association of these polymorphisms with innate immune response, zinc ion bioavailability and Metallothioneins (MT) homeostasis is an useful tool to unravel the role played by zinc-gene interactions in longevity, especially due to the inability of MT in zinc release in ageing and chronic inflammation. In ageing, this last fact leads to depressed innate immune response for host defence. In contrast, in very old age the inflammation is lower with subsequent more zinc ion bioavailability, less MT gene expression and satisfactory innate immunity. Therefore, the zinc-gene (IL-6, TNF-alpha, Hsp70-2) interactions, via MT homeostasis, are crucial to achieve successful ageing.
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Affiliation(s)
- Eugenio Mocchegiani
- Immunology Center (Laboratory of Nutrigenomic and Immunosenescence), Research Department, INRCA, Via Birarelli 8, 60121, Ancona, Italy,
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MAY LESTERT, SANTHANAM UMA, TATTER STEPHENB, GHRAYEB JOHN, SEHGAL PRAVINKUMARB. Multiple Forms of Human Interleukin-6. Ann N Y Acad Sci 2008. [DOI: 10.1111/j.1749-6632.1989.tb24004.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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RAY ANURADHA, TATTER STEPHENB, SANTHANAM UMA, HELFGOTT DAVIDC, MAY LESTERT, SEHGAL PRAVINKUMARB. Regulation of Expression of Interleukin-6. Ann N Y Acad Sci 2008. [DOI: 10.1111/j.1749-6632.1989.tb24028.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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BOWCOCK AM, RAY A, ERLICH HA, SEHGAL PB. The Molecular Genetics of Beta-2 Interferon/Interleukin-6 (IFNβ2/IL6)a. Ann N Y Acad Sci 2008. [DOI: 10.1111/j.1749-6632.1989.tb24027.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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REVEL MICHEL, ZILBERSTEIN ASHER, CHEN LOUISE, GOTHELF YAEL, BARASH ITAMAR, NOVICK DANIELA, RUBINSTEIN MENACHEM, MICHALEVICZ RITA. Biological Activities of Recombinant Human IFN-β2/IL-6 (E. coli)a. Ann N Y Acad Sci 2008. [DOI: 10.1111/j.1749-6632.1989.tb24007.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Matsuura Y, Tatsumi M, Enami K, Morikawa S, Yamazaki S, Kohase M. Expression of IL-6/IFN-beta 2 in a baculovirus system and its biological function. Ann N Y Acad Sci 2008; 557:122-8; discussion 129. [PMID: 2660693 DOI: 10.1111/j.1749-6632.1989.tb24005.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Y Matsuura
- National Institute of Health, Gakuen Musashimurayama-shi, Tokyo, Japan
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Vakili S, Caudill MA. Personalized nutrition: nutritional genomics as a potential tool for targeted medical nutrition therapy. Nutr Rev 2007; 65:301-15. [PMID: 17695371 DOI: 10.1111/j.1753-4887.2007.tb00308.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
An emerging goal of medical nutrition therapy is to tailor dietary advice to an individual's genetic profile. In the United States and elsewhere, "nutrigenetic" services are available over the Internet without the direct involvement of a health care professional. Among the genetic variants most commonly assessed by these companies are those found in genes that influence cardiovascular disease risk. However, the interpretation of DNA-based data is complex. The goal of this paper is to carefully examine nutritional genomics as a potential tool for targeted medical nutrition therapy. The approach is to use heart health susceptibility genes and their common genetic variants as the model.
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Affiliation(s)
- Sina Vakili
- Human Nutrition and Food Science Department, Cal Poly Pomona, 3801 W. Temple Ave., Pomona, CA 91768, USA
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Abstract
Cytokines are pleiotropic substances that are known to participate in inflammatory and immune responses as well as cell differentiation and proliferation. Interleukin-6 (IL-6) is a key cytokine with pro-inflammatory function. Wound healing is a complex cascade of physiologic events comprising inflammation, proliferation and remodeling, and proceeds with the integrated actions of different cells, cytokines, and the extracellular matrix. Aberrant wound healing results in keloid formation which causes disfigured appearance, discomfort, psychological stress, and patient frustration. In this review, the role of IL-6 signaling pathway in the pathogenesis of keloid is assessed and its potential as a therapeutic target is addressed. The existing data suggest that IL-6 mediated inflammation is a key player and may be considered as a common causative factor for development of keloid. Furthermore, in a recent comprehensive study, we confirmed the functional role of IL-6 signaling in keloid pathogenesis. Accordingly, inhibitory strategies of IL-6 signaling pathway by targeting the IL-6 receptors, its downstream effecters, or other molecules influencing this pathway appear to have considerable potential as new therapeutic or preventive challenges for keloid. Hopefully, several IL-6 blocking agents including a humanized antibody to IL-6 receptor have been developed and successfully used in clinical trials of inflammatory diseases. It is likely that these agents may prove worthy in the treatment or prevention of keloid as well. Future in-depth exploration of such challenges will shed light on their efficacy and safety for clinical application in keloid.
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Affiliation(s)
- Mohammad Ghazizadeh
- Department of Molecular Pathology, Institute of Gerontology, Postgraduate School of Medicine, Nippon Medical School.
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Holla LI, Fassmann A, Stejskalová A, Znojil V, Vanĕk J, Vacha J. Analysis of the Interleukin-6 Gene Promoter Polymorphisms in Czech Patients with Chronic Periodontitis. J Periodontol 2004; 75:30-6. [PMID: 15025214 DOI: 10.1902/jop.2004.75.1.30] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Chronic periodontitis is an inflammatory disease, which is a major cause of tooth loss. The proinflammatory cytokines interleukin-1 (IL-1) and interleukin-6 (IL-6) are key regulators of the host response to microbial infection and major modulators of extracellular matrix catabolism and bone resorption. The purpose of this study was to investigate the associations of chronic periodontitis with IL-6 gene polymorphisms (at positions -597 [G/A], -572 [G/C], and -174 [G/C]). METHODS We analyzed allele, genotype, and haplotype distributions of the IL-6 promoter variants in a case-control study involving 148 patients with chronic periodontitis and 107 unrelated controls. RESULTS Our results showed significant differences in the distributions of alleles and genotypes of the IL-6 (-572 G/C) polymorphism between patients and the control population (chi2 = 10.393, P= 0.001, P(corr) < 0.01). The difference was due to the underrepresentation of the -572 G/C heterozygotes in patients (6.1%) compared to controls (19.6%). Although no variant "CC" homozygotes were detected in our cases and controls, heterozygosity protected against chronic periodontitis, representing a 73% reduction of risk (odds ratio [OR] = 0.27, 95% confidence interval: 0.12-0.61) compared to wild-type homozygotes. However, there were no significant differences in genotype or allele frequencies between both groups for IL-6 -597 G/A and -174 G/C polymorphisms. CONCLUSION This study is the first, to our knowledge, suggesting that the -572 G/C polymorphism of the IL-6 gene may be one of the protective factors associated with lower susceptibility to chronic periodontitis.
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Affiliation(s)
- Lydie Izakovicova Holla
- Department of Pathological Physiology, Medical Faculty, Masaryk University, Brno, Czech Republic.
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Saha A, Bairwa NK, Ranjan A, Gupta V, Bamezai R. Two novel somatic mutations in the human interleukin 6 promoter region in a patient with sporadic breast cancer. ACTA ACUST UNITED AC 2003; 30:397-400. [PMID: 14675392 DOI: 10.1111/j.1365-2370.2003.00423.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two new single nucleotide mutations were observed within the promoter region of human interleukin-6 gene (IL-6) in the tumour sample of a patient with sporadic breast cancer, which was a somatic change. Both mutations, one at -125 (C > G) and the other at position -173 (G > T) from the translation start site, were transversions observed at new positions, not reported earlier. In addition to these two novel mutations in this patient, a known somatic polymorphism was also observed at position -174 (G > C) (from the transcription initiation site, redesignated as -236 from the translational initiation site as per the HUGO nomenclature). Further, a preliminary comparative analysis of the studied promoter region by the 'ConsInspector 3.0' program, where the mutated sequence (AF362378) was compared with the sequence existing in the database (Y00081), depicted the presence of the variations in putative binding sites for transcription factors such as glucocorticoid response element (GRE) and nuclear factor kappa-B (NFkappa-B), which could lead to differential expression of this gene.
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Affiliation(s)
- A Saha
- National Centre of Applied Human Genetics, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
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Hwang IR, Hsu PI, Peterson LE, Gutierrez O, Kim JG, Graham DY, Yamaoka Y. Interleukin-6 genetic polymorphisms are not related to Helicobacter pylori-associated gastroduodenal diseases. Helicobacter 2003; 8:142-8. [PMID: 12662382 DOI: 10.1046/j.1523-5378.2003.00135.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND Polymorphisms in the promoter region of the proinflammatory cytokine, interleukin (IL)-6 have been related to several chronic inflammatory diseases. Inter-individual variation in the severity of gastric inflammation may be important in determining the clinical outcome of an Helicobacter pylori infection and relate to polymorphisms in this region. MATERIALS AND METHODS We studied H. pylori-infected patients with duodenal ulcer or gastric cancer. In addition six gastric cancer cell lines, AGS, SNU-668, MKN-1, MKN-7, MKN28 and KATOIII, were cocultured with both cag pathogenicity island-positive and -negative H. pylori. Single nucleotide polymorphisms at positions -174, -572, and -597 in the IL-6 promoter region were identified by PCR-RFLP. The IL-6 production from the cancer cells was determined by ELISA. RESULTS Sixty patients with gastric cancer and 60 with duodenal ulcer were studied. The alleles at positions -174 and -597 were closely linked (-174G/-597G or -174C/-597A) regardless of the ethnic group or disease presentation. There was no difference in the allele frequency at any of the sites among patient groups. H. pylori-induced IL-6 production from the gastric cancer cell lines was also independent of the IL-6 polymorphisms or the presence of the cag pathogenicity island. CONCLUSIONS The genetic polymorphisms in IL-6 can be attributable to ethnicity and appear to be independent of the clinical outcome of an H. pylori infection.
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Affiliation(s)
- Il-Ran Hwang
- Department of Medicine, Veterans Affairs Medical Center and Baylor College of Medicine, Houston, Texas 77030, USA
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Vesce F, Scapoli C, Giovannini G, Tralli L, Gotti G, Valerio A, Piffanelli A. Cytokine imbalance in pregnancies with fetal chromosomal abnormalities. Hum Reprod 2002; 17:803-8. [PMID: 11870140 DOI: 10.1093/humrep/17.3.803] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND The aim of the present study is to investigate the levels of some of the cytokines which may be involved in the mechanisms leading to the impairment of placental perfusion and to the onset of uterine contractions in pregnancies with fetal genetic abnormalities compared with controls. METHODS The amniotic fluid and maternal plasma levels of interleukin-6, interleukin-8 and tumour necrosis factor-beta in patients with fetal chromosomal abnormalities were measured, as well as in euploid pregnancies in the seventh week of gestation. RESULTS An increase of interleukin-6 (P = 0.034) and a decrease of interleukin-8 (P < or =0.0001) in amniotic fluid, and a decrease of interleukin-6 in the maternal plasma (P = 0.026) was shown in pregnancies with fetal chromosomal abnormalities. A positive correlation was observed between amniotic interleukin-8 and serum interleukin-6 in the presence of fetal aneuploidy (P < 0.006). CONCLUSION Further investigations of cytokine imbalance in pregnancies with poor outcome as a consequence of genetic disorders rather than infection is warranted.
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Affiliation(s)
- F Vesce
- Department of Biomedical Sciences and Advanced Therapy, Section of Obstetrics and Gynaecology, University of Ferrara, 44100 Ferrara, Italy.
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Tuyt LM, Dokter WH, Vellenga E. Gene expression, biological effects and clinical aspects of lymphokines. Crit Rev Oncol Hematol 1997; 26:175-213. [PMID: 9481523 DOI: 10.1016/s1040-8428(97)10006-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- L M Tuyt
- Department of Hematology, University Hospital, Groningen, Netherlands
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32
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Affiliation(s)
- C E Hack
- Central Laboratory of the Netherlands Red Cross Blood Transfusion Service, University of Amsterdam, The Netherlands
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33
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Simpson RJ, Hammacher A, Smith DK, Matthews JM, Ward LD. Interleukin-6: structure-function relationships. Protein Sci 1997; 6:929-55. [PMID: 9144766 PMCID: PMC2143693 DOI: 10.1002/pro.5560060501] [Citation(s) in RCA: 270] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Interleukin-6 (IL-6) is a multifunctional cytokine that plays a central role in host defense due to its wide range of immune and hematopoietic activities and its potent ability to induce the acute phase response. Overexpression of IL-6 has been implicated in the pathology of a number of diseases including multiple myeloma, rheumatoid arthritis, Castleman's disease, psoriasis, and post-menopausal osteoporosis. Hence, selective antagonists of IL-6 action may offer therapeutic benefits. IL-6 is a member of the family of cytokines that includes interleukin-11, leukemia inhibitory factor, oncostatin M, cardiotrophin-1, and ciliary neurotrophic factor. Like the other members of this family, IL-6 induces growth or differentiation via a receptor-system that involves a specific receptor and the use of a shared signaling subunit, gp130. Identification of the regions of IL-6 that are involved in the interactions with the IL-6 receptor, and gp130 is an important first step in the rational manipulation of the effects of this cytokine for therapeutic benefit. In this review, we focus on the sites on IL-6 which interact with its low-affinity specific receptor, the IL-6 receptor, and the high-affinity converter gp130. A tentative model for the IL-6 hexameric receptor ligand complex is presented and discussed with respect to the mechanism of action of the other members of the IL-6 family of cytokines.
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MESH Headings
- Amino Acid Sequence
- Animals
- Antigens, CD/chemistry
- Antigens, CD/physiology
- Arthritis, Rheumatoid/immunology
- Castleman Disease/immunology
- Chromosome Mapping
- Chromosomes, Human, Pair 7
- Cytokines/physiology
- Female
- Growth Hormone/chemistry
- Humans
- Interleukin-6/biosynthesis
- Interleukin-6/chemistry
- Interleukin-6/physiology
- Models, Biological
- Models, Structural
- Molecular Sequence Data
- Multiple Myeloma/immunology
- Osteoporosis, Postmenopausal/immunology
- Protein Structure, Secondary
- Psoriasis/immunology
- Receptors, Interleukin/chemistry
- Receptors, Interleukin/physiology
- Receptors, Interleukin-6
- Receptors, Somatotropin/chemistry
- Sequence Alignment
- Sequence Homology, Amino Acid
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Affiliation(s)
- R J Simpson
- Joint Protein Structure Laboratory, Ludwig Institute for Cancer Research, (Melbourne Tumour Biology Branch), Parkville, Victoria, Australia.
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Malaguarnera M, Di Fazio I, Romeo MA, Restuccia S, Laurino A, Trovato BA. Elevation of interleukin 6 levels in patients with chronic hepatitis due to hepatitis C virus. J Gastroenterol 1997; 32:211-5. [PMID: 9085170 DOI: 10.1007/bf02936370] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Interleukin 6 (IL-6) is a pleiotropic cytokine produced by a wide variety of lymphoid and non-lymphoid tissues. We studied the relationship between IL-6 and the liver in an attempt to elucidate this cytokine's role in hepatitis C-induced liver inflammation. We investigated the behavior of serum IL-6 in 25 patients with chronic hepatitis C (divided into three groups depending on severity) and in 27 healthy controls. Our results showed a significant elevation (P < 0.0001) in serum IL-6 levels in the patients with chronic hepatitis C, correlated with the histological activity index (HAI) and their HCV-RNA serum levels. This rise may represent the expression of the hepatitis C virus-induced inflammatory state.
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Affiliation(s)
- M Malaguarnera
- Department of Internal Medicine and Geriatrics, University of Catania, Italy
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35
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Biffl WL, Moore EE, Moore FA, Peterson VM. Interleukin-6 in the injured patient. Marker of injury or mediator of inflammation? Ann Surg 1996; 224:647-64. [PMID: 8916880 PMCID: PMC1235442 DOI: 10.1097/00000658-199611000-00009] [Citation(s) in RCA: 389] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE The effects of interleukin (IL)-6 in the injured patient are examined in an attempt to clarify the potential pathophysiologic role of IL-6 in the response to injury. SUMMARY BACKGROUND DATA Interleukin-6 is an integral cytokine mediator of the acute phase response to injury and infection. However, prolonged and excessive elevations of circulating IL-6 levels in patients after trauma, burns, and elective surgery have been associated with complications and mortality. The mechanistic role of IL-6 in mediating these effects is unclear. METHODS A review of current literature is performed to summarize the origins, mechanisms of action, and biologic effects of IL-6 and to characterize the IL-6 response to injury. RESULTS Interleukin-6 is a multifunctional cytokine expressed by a variety of cells after a multitude of stimuli, under complex regulatory control mechanisms. The IL-6 response to injury is uniquely consistent and related to the magnitude of the insult. Moreover, the early postinjury IL-6 response correlates with complications as well as mortality. CONCLUSIONS Interleukin-6 appears to play an active role in the postinjury immune response, making it an attractive therapeutic target in attempts to control hyperinflammatory provoked organ injury.
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Affiliation(s)
- W L Biffl
- Department of Surgery, Denver General Hospital, Colorado 80204, USA
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36
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Diaw L, Lefebvre d'Hellencourt C, Cornillet I, Vuillier F, Guenounou M, Dighiero G. Expression and production of cytokines by heterohybrids and their parental B cells in CLL. Leuk Lymphoma 1996; 21:281-91. [PMID: 8726409 DOI: 10.3109/10428199209067609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Three hybrids derived from CD5+ B cell chronic lymphocytic leukemia (B-CLL) and their parental B cells were studied for phenotypic evolution, immunoglobulin (Ig), tumor necrosis factor-alpha (TNF-alpha) and interleukin-6 (IL-6) secretion. When phenotypic evolution was examined, hybrids showed the loss of classical B cell markers, indicating that they follow the same pattern of phenotypic differentiation as normal B cells. Hybrids displayed spontaneous high Ig secretion, which did not appear to be modified through stimulation by phorbol 12-myristate 13-acetate (PMA), recombinant interferon-gamma (rIFN-gamma) and Staphylococcus aureus Cowan I (SAC). Parental cells secreted minimal amounts of Ig spontaneously or through IFN-gamma and SAC stimulation, whereas PMA succeeded in increasing this secretion. An opposite pattern was observed when TNF-alpha and IL-6 secretion an expression at the mRNA level were assessed in hybrids and parental cells. TNF-alpha and IL-6 were spontaneously secreted by parental cells and this secretion was increased after PMA and SAC stimulation, both cytokine secretion and expression at the mRNA level were negative in hybrid cells. The absence of expression of these cytokines could be explained either by chromosomal loss or by down regulation. These results indicate that when parental CLL cells are induced to differentiate in the heterohybrid model, they acquire high spontaneous secretion of Ig, lose the classical B cell phenotypic markers and down regulate the expression of the cytokines studied.
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MESH Headings
- B-Lymphocytes/metabolism
- Blotting, Southern
- Chromosome Deletion
- Down-Regulation
- Gene Expression Regulation, Leukemic
- Humans
- Hybrid Cells
- Immunoglobulin M/physiology
- Interleukin-6/biosynthesis
- Interleukin-6/genetics
- Interleukin-6/metabolism
- Karyotyping
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Phenotype
- RNA, Messenger/metabolism
- Tumor Cells, Cultured
- Tumor Necrosis Factor-alpha/biosynthesis
- Tumor Necrosis Factor-alpha/genetics
- Tumor Necrosis Factor-alpha/metabolism
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Affiliation(s)
- L Diaw
- Unite d'Immunohematologie, Institut Pasteur, Paris, France
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Veldhuis GJ, Willemse PH, Mulder NH, Limburg PC, De Vries EG. Potential use of recombinant human interleukin-6 in clinical oncology. Leuk Lymphoma 1996; 20:373-9. [PMID: 8833392 DOI: 10.3109/10428199609052418] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Recombinant human IL-6 (rhIL-6) is a pleiotropic cytokine with stimulatory actions on the hematopoietic system, the immune system and hepatocytes. Clinical interest in the use of this cytokine was raised because of its thrombopoietic properties and also because of its anti-tumor activity, which was shown in vitro and in the preclinical setting. Various studies show that doses up to 10 mu kg/kg/d rhIL-6 before and after chemotherapy are tolerable and the most frequent side-effects encountered consist of flu-like symptoms. Furthermore, a consistent decrease in hemoglobin was reported during rhIL-6 treatment. This was probably due to hemodilution, although a change in ferrokinetics, may also at least partly, explain the anemia. An evident increase of platelets has been observed in various studies. After chemotherapy, rh-IL6 seemed to hasten platelet recovery, without affecting platelet nadir. Preliminary data from studies investigating the value of rhIL-6 as an anti-tumor agent in renal cell carcinoma and melanoma reported low response rates, between 8 and 14%. The results of rhIL-6 in ameliorating chemotherapy induced bone-marrow depression and especially thrombocytopenia, are promising and merit further phase III studies.
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Affiliation(s)
- G J Veldhuis
- Department of Internal Medicine, University Hospital, Groningen, The Netherlands
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Affiliation(s)
- M Lotz
- Department of Medicine, University of California, San Diego, La Jolla 92093-0663, USA
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39
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Affiliation(s)
- M Lotz
- Department of Medicine, University of California, San Diego, La Jolla 92093-0663
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Buyalos RP, Watson JM, Martinez-Maza O. Detection of interleukin-6 in human follicular fluid**Presented at the 46th Annual Meeting of The American Fertility Society, Washington, D.C., October 15 to 18, 1990.††Supported by a grant from the California Institute for Cancer Research, Los Angeles, California, and by grants CA 01588 from the National Institutes of Health and CA 09120 from the National Institutes of Health Tumor Immunology Institutional Training, Bethesda, Maryland. Fertil Steril 1992. [DOI: 10.1016/s0015-0282(16)55079-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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41
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Brach MA, Herrmann F. Interleukin 6: presence and future. INTERNATIONAL JOURNAL OF CLINICAL & LABORATORY RESEARCH 1992; 22:143-51. [PMID: 1520911 DOI: 10.1007/bf02591414] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This review article deals with the basic biological characteristics of the multifunctional cytokine interleukin-6 (IL-6) in man. Three central issues will be addressed more closely: the pathophysiological role of unbalanced IL-6 production in various disease states, the diagnostic usefulness of measurements of IL-6 in biological fluids, and the possible role of IL-6, IL-6 antagonists, and IL-6 derivatives as therapeutic tools in clinical medicine.
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Affiliation(s)
- M A Brach
- Department of Hematology and Oncology, University of Freiburg Medical Center, Federal Republic of Germany
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42
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Hirano T. Interleukin 6 (IL-6) and its receptor: their role in plasma cell neoplasias. INTERNATIONAL JOURNAL OF CELL CLONING 1991; 9:166-84. [PMID: 2061619 DOI: 10.1002/stem.5530090303] [Citation(s) in RCA: 90] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Interleukin 6 (IL-6) is a multifunctional cytokine regulating immune response acute phase reaction and hematopoiesis. IL-6 plays a critical role in B cell differentiation to plasma cells and is a potent growth factor for plasmacytoma and myeloma. Abnormal production of IL-6 has been suggested to be involved in polyclonal plasma cell abnormalities and plasma cell neoplasias. The deregulated expression of the IL-6 gene in transgenic mice resulted in the generation of malignant plasmacytoma. Based on these findings, it could be considered that continuous IL-6 gene expression plays an essential role in a multistep oncogenesis of plasma cell neoplasias. The role of IL-6 and its receptor in the generation of plasma cell neoplasias and the mechanisms of the IL-6 gene expression and IL-6 receptor-mediated signal transduction are described.
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Affiliation(s)
- T Hirano
- Division of Molecular Oncology, Biomedical Research Center, Osaka University Medical School, Japan
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Krueger J, Ray A, Tamm I, Sehgal PB. Expression and function of interleukin-6 in epithelial cells. J Cell Biochem 1991; 45:327-34. [PMID: 2045425 DOI: 10.1002/jcb.240450404] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Epithelial cells both produce and are affected by interleukin-6 (IL-6). Experiments with an adenocarcinoma-derived cell line (HeLa) reveal that activation of the transfected human IL-6 promoter occurs largely through two partially overlapping second messenger (cAMP, phorbol ester)- and cytokine (IL-1, TNF, serum)-responsive enhancer elements (MRE 1, -173 to -151 and MRE II, -158 to -145). MRE I contains the typical GACGTCA cAMP and phorbol ester-responsive (CRE-TRE) motif, whereas MRE II defines a new CRE/TRE motif that contains an imperfect dyad repeat. The mechanism of dexamethasone-mediated repression of IL-6 gene expression in epithelial cells involves occlusion of the entire MRE enhancer region and of the core-promoter elements (TATA-box and RNA start site) by ligand-activated glucocorticoid receptor. Enhanced levels of IL-6 expression are observed in many solid tumors and in the hyperproliferative (and glucocorticoid-suppressible) lesions of psoriasis. In cell culture, IL-6 enhances, inhibits, or has no effect on the proliferation of epithelial cells depending upon the cell-type examined. IL-6 enhances proliferation of keratinocytes but inhibits that of breast carcinoma cell lines ZR-75-1 and T-47D. In these breast carcinoma cells, IL-6 elicits a major change in cell phenotype which is characterized by a fibroblastoid morphology, enhanced motility, increased cell-cell separation, and decreased adherens type junctions (desmosomes and focal adhesions). The new data identify IL-6 as a regulator of epithelial cell growth and of cell-cell association.
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Affiliation(s)
- J Krueger
- Rockefeller University, New York, New York 10021
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Sawada T, Tsuda H, Takatsuki K. Spontaneous production of interleukin 6 by adult T-cell leukaemia cells. Br J Cancer 1990; 62:923-4. [PMID: 2257221 PMCID: PMC1971554 DOI: 10.1038/bjc.1990.410] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- T Sawada
- Second Department of Internal Medicine, Kumamoto University Medical School, Japan
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46
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Affiliation(s)
- T Matsuda
- Division of Molecular Oncology, Osaka University Medical School, Japan
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47
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LOHI JOUKO, PERTOVAARA LIISA, SISTONEN LEA, ALITALO KARI, KESKI-OJA JORMA. Regulation by TGF? of Genes Involved in Growth Control: Interleukin-6. Ann N Y Acad Sci 1990. [DOI: 10.1111/j.1749-6632.1990.tb16130.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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48
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Abstract
The cytokine interleukin-6 (IL-6) has emerged as a major systemic alarm signal which appears to be produced by essentially every injured tissue. Recent evidence points to the skin, particularly the injured skin, as one of the major sites of IL-6 production. The hallmark of IL-6 gene regulation is its induction by inflammation-associated cytokines, bacterial products, virus infection, and activation of any of the three major signal transduction pathways (diacylglycerol-, cAMP-, and Ca(++)-activated). Many of these inducers act largely through a 23-bp "multiple-response element" in the IL-6 promoter. Different cell types, including keratinocytes, secrete multiple post-translationally modified forms of IL-6. This cytokine, in turn, plays a key role in activating a variety of local and systemic host defense mechanisms that are aimed at limiting tissue injury. Thus, IL-6 elicits major changes in the biochemical, physiologic, and immunologic status of the host (e.g., the "acute phase" plasma protein response; activation of B, T, and NK-cell function). IL-6 enhances the proliferation of human keratinocytes and of many B-cell lines but inhibits that of certain carcinoma cell lines; nevertheless, IL-6 can enhance the motility of these carcinoma cells. Elevated levels of IL-6 are observed in human body fluids during acute and chronic infections, neoplasia, autoimmune diseases, and psoriasis and following third-degree burns. It is likely that IL-6 produced by cellular elements in the skin represents an important means of communication between the external environment and the millieu interieur.
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Affiliation(s)
- P B Sehgal
- Rockefeller University, New York, New York 10021
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49
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Romero R, Avila C, Santhanam U, Sehgal PB. Amniotic fluid interleukin 6 in preterm labor. Association with infection. J Clin Invest 1990; 85:1392-400. [PMID: 2332497 PMCID: PMC296584 DOI: 10.1172/jci114583] [Citation(s) in RCA: 440] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
To evaluate whether IL-6 participates in the host response to intrauterine infection, we studied IL-6 bioactivity and isoforms in amniotic fluid (AF). Two different assays for IL-6 were used: the hepatocyte stimulating factor assay (in Hep3B2 cells) and the SDS-PAGE/immunoblot assay. IL-6 determinations were performed in 205 AF samples. Samples were obtained from patients in the midtrimester of pregnancy (n = 25), at term with no labor (n = 31), at term in active labor (n = 40), and from patients in preterm labor (n = 109). Higher AF IL-6 levels were observed in women in preterm labor with intraamniotic infection than in women in preterm labor without intraamniotic infection (median = 375 ng/ml, range = 30-5000 ng/ml vs. median = 1.5 ng/ml, range = 0-500, respectively, P less than 0.0001). The 23-25- and 28-30-kD IL-6 species could be readily detected in SDS-PAGE immunoblots performed directly on 10-microliters aliquots of AF from patients with intraamniotic infection. Among women in preterm labor with culture-negative AF, those who failed to respond to subsequent tocolytic treatment had higher AF IL-6 concentrations than those who responded to therapy (median = 50 ng/ml vs. median = 1.2 ng/ml, respectively, P less than 0.05). Only low levels of IL-6 were detected in AF obtained from normal women in the midtrimester and third trimester of pregnancy. Decidual tissue explants obtained from the placentas of women undergoing elective cesarean section at term without labor (n = 11) produced IL-6 in response to bacterial endotoxin. In a pilot study, AF IL-6 was determined in 56 consecutive women admitted with preterm labor. All patients (n = 10) with elevated AF IL-6 (cutoff = 46 ng/ml) delivered a premature neonate. 4 of these 10 patients had positive AF cultures for microorganisms. These studies implicate IL-6 in the host response to intrauterine infection and suggest that evaluation of AF IL-6 levels may have diagnostic and prognostic value in the management of women in preterm labor.
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Affiliation(s)
- R Romero
- Department of Obstetrics and Gynecology, Yale University School of Medicine, New Haven, Connecticut 06510
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50
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Affiliation(s)
- P C Heinrich
- Institut für Biochemie der RWTH Aachen, Federal Republic of Germany
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