1
|
Bumiller-Bini Hoch V, Schneider L, Pumpe AE, Lüders E, Hundt JE, Boldt ABW. Marked to Die-Cell Death Mechanisms for Keratinocyte Acantholysis in Pemphigus Diseases. Life (Basel) 2022; 12:life12030329. [PMID: 35330080 PMCID: PMC8948972 DOI: 10.3390/life12030329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/15/2022] [Accepted: 02/18/2022] [Indexed: 11/17/2022] Open
Abstract
Pemphigus is a group of blistering autoimmune diseases causing painful skin lesions, characterized by acantholysis and by the production of autoantibodies against, mainly, adhesion proteins. We reviewed the literature for molecules and/ or features involved in the 12 cell death pathways described by Nomenclature Committee on Cell Death, taking place in pemphigus patients, cell lines, or human skin organ cultures treated with sera or IgG from pemphigus patients or in pemphigus mouse models, and found 61 studies mentioning 97 molecules involved in cell death pathways. Among the molecules, most investigated were pleiotropic molecules such as TNF and CASP3, followed by FASL and CASP8, and then by FAS, BAX, BCL2, and TP53, all involved in more than one pathway but interpreted to function only within apoptosis. Most of these previous investigations focused only on apoptosis, but four recent studies, using TUNEL assays and/or electron microscopy, disqualified this pathway as a previous event of acantholysis. For PV, apoptolysis was suggested as a cell death mechanism based on pathogenic autoantibodies diversity, mitochondrial dysfunction, and p38 MAPK signaling. To answer those many questions that remain on cell death and pemphigus, we propose well-controlled, statistically relevant investigations on pemphigus and cell death pathways besides apoptosis, to overcome the challenges of understanding the etiopathology of pemphigus diseases.
Collapse
Affiliation(s)
- Valéria Bumiller-Bini Hoch
- Laboratory of Human Molecular Genetics, Department of Genetics, Federal University of Paraná, Curitiba 81531-980, Brazil; (V.B.-B.H.); (L.S.)
- Postgraduate Program in Genetics, Department of Genetics, Federal University of Paraná (UFPR), Curitiba 81531-980, Brazil
- Lübeck Institute of Experimental Dermatology, University of Lübeck, 23562 Lübeck, Germany; (A.E.P.); (E.L.); (J.E.H.)
| | - Larissa Schneider
- Laboratory of Human Molecular Genetics, Department of Genetics, Federal University of Paraná, Curitiba 81531-980, Brazil; (V.B.-B.H.); (L.S.)
| | - Anna Elisabeth Pumpe
- Lübeck Institute of Experimental Dermatology, University of Lübeck, 23562 Lübeck, Germany; (A.E.P.); (E.L.); (J.E.H.)
| | - Emelie Lüders
- Lübeck Institute of Experimental Dermatology, University of Lübeck, 23562 Lübeck, Germany; (A.E.P.); (E.L.); (J.E.H.)
| | - Jennifer Elisabeth Hundt
- Lübeck Institute of Experimental Dermatology, University of Lübeck, 23562 Lübeck, Germany; (A.E.P.); (E.L.); (J.E.H.)
| | - Angelica Beate Winter Boldt
- Laboratory of Human Molecular Genetics, Department of Genetics, Federal University of Paraná, Curitiba 81531-980, Brazil; (V.B.-B.H.); (L.S.)
- Correspondence:
| |
Collapse
|
2
|
Jerbi A, Hachicha H, Feki S, Abida O, Bahloul E, Sellami K, Bouzid A, Turki H, Masmoudi A, Masmoudi H. Autoantibodies against Desmoglein 1 and 3 in South Tunisian pemphigus. LA TUNISIE MEDICALE 2021; 99:992-999. [PMID: 35288901 PMCID: PMC8972175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
BACKGROUND Desmoglein (Dsg) 1 and 3 are the 2 major autoantigens in pemphigus foliaceus (PF) and pemphigus vulgaris (PV). AIM We aimed to determine anti-Dsg1 and 3 Abs'usefulness in the diagnosis of pemphigus and to assess the correlation of these antibodies (Abs) with clinical phenotype and disease activity in south Tunisian patients. METHODS We retrospectively analyzed 131 samples from 82 patients (52 with PF and 30 with PV) during follow-up. Anti-Dsg1 and 3 Abs were measured by ELISA. Consecutive anti-Dsg1 and 3 Abs were correlated with disease activity. Receiver operating characteristics (ROC) curve were calculated to determine anti-Dsg1 and 3 Abs'cut-offs with optimal sensitivity and specificity for disease activity. RESULTS Anti-Dsg1 and 3 levels were associated to in PF and PV patients respectively (p<0,001). Anti-Dsg1 and 3 Ab were associated with skin (95%) and mucosal (60%) lesions, respectively. A significant decrease of anti-Dsg1 Abs was observed in patients with PF in clinical remission (36 ± 62 U/mL; (p=0,04). No correlation was found between anti-Dsg3 Abs and the course of mucosal lesions in PV (p=0,3). During follow-up, anti-Dsg1 Abs correlated with relapses (177 ±60 U/mL ; p=0,04). The 161,5 U/mL cut-off for anti-Dsg1 Abs provided 100% specificity and 86,4% sensitivity in PF disease activity. The 30,7U/mL cut-off for anti-Dsg3 provided 89,5% sensitivity and 100% specificity in PV. CONCLUSIONS High anti-Dsg3 Abs values are not always associated with PV disease activity. Anti-Dsg1 Abs showed a closer relationship with skin activity in PS and should be therefore taken into account in management of pemphigus patients.
Collapse
Affiliation(s)
- Ameni Jerbi
- 1-Laboratoire d’Immunologie, CHU Habib Bourguiba Sfax, Tunisie / Faculté de médecine de Sfax
| | - Hend Hachicha
- 1-Laboratoire d’Immunologie, CHU Habib Bourguiba Sfax, Tunisie / Faculté de médecine de Sfax
| | - Sawsan Feki
- 1-Laboratoire d’Immunologie, CHU Habib Bourguiba Sfax, Tunisie / Faculté de médecine de Sfax
| | - Olfa Abida
- 1-Laboratoire d’Immunologie, CHU Habib Bourguiba Sfax, Tunisie / Faculté de médecine de Sfax
| | - Emna Bahloul
- 2-Service de Dermatologie, CHU Hedi CHAKER Sfax, Tunisie / Faculté de médecine de Sfax
| | - Khadija Sellami
- 2-Service de Dermatologie, CHU Hedi CHAKER Sfax, Tunisie / Faculté de médecine de Sfax
| | - Amina Bouzid
- 1-Laboratoire d’Immunologie, CHU Habib Bourguiba Sfax, Tunisie / Faculté de médecine de Sfax
| | - Hamida Turki
- 2-Service de Dermatologie, CHU Hedi CHAKER Sfax, Tunisie / Faculté de médecine de Sfax
| | - Abderrahmen Masmoudi
- 2-Service de Dermatologie, CHU Hedi CHAKER Sfax, Tunisie / Faculté de médecine de Sfax
| | - Hatem Masmoudi
- 1-Laboratoire d’Immunologie, CHU Habib Bourguiba Sfax, Tunisie / Faculté de médecine de Sfax
| |
Collapse
|
3
|
Bumiller-Bini V, Cipolla GA, Spadoni MB, Augusto DG, Petzl-Erler ML, Beltrame MH, Boldt ABW. Condemned or Not to Die? Gene Polymorphisms Associated With Cell Death in Pemphigus Foliaceus. Front Immunol 2019; 10:2416. [PMID: 31681304 PMCID: PMC6813369 DOI: 10.3389/fimmu.2019.02416] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Accepted: 09/26/2019] [Indexed: 12/13/2022] Open
Abstract
Pemphigus foliaceus (PF) is an autoimmune blistering skin disease that occurs sporadically across the globe and is endemic in Brazil. Keratinocyte adhesion loss (acantholysis) is associated with high levels of anti-desmoglein 1 IgG autoantibodies, but the role of cell death is poorly understood in PF. Current evidence disqualifies apoptosis as the major cell death mechanism and no other process has yet been investigated. To approach the role of variation in genes responsible for cell death pathways in pemphigus susceptibility, we systematically investigated the frequencies of 1,167 polymorphisms from genes encoding products of all 12 well-established cell death cascades (intrinsic and extrinsic apoptosis, necrosis, necroptosis, ferroptosis, pyroptosis, parthanatos, entotic, NETotic, lysosome-dependent, autophagy-dependent, and immunogenic). By multivariate logistic regression, we compared allelic and genotypic frequencies of 227 PF patients and 194 controls obtained by microarray hybridization. We found 10 variants associated with PF (p < 0.005), belonging to six cell death pathways: apoptosis (TNF, TRAF2, CD36, and PAK2), immunogenic cell death (EIF2AK3, CD47, and SIRPA), necroptosis (TNF and TRAF2), necrosis (RAPGEF3), parthanatos (HK1), and pyroptosis (PRKN). Five polymorphisms were associated with susceptibility: TNF rs1800630*A (OR = 1.9, p = 0.0003), CD36 rs4112274*T (OR = 2.14, p = 0.0015), CD47 rs12695175*G (OR = 1.77, p = 0.0043), SIRPA rs6075340*A/A (OR = 2.75, p = 0.0009), and HK1 rs7072268*T (OR = 1.48, p = 0.0045). Other five variants were associated with protection: TRAF2 rs10781522*G (OR = 0.64, p = 0.0014), PAK2 rs9325377*A/A (OR = 0.48, p = 0.0023), EIF2AK3 rs10167879*T (OR = 0.48, p = 0.0007), RAPGEF3 rs10747521*A/A (OR = 0.42, p = 0.0040), and PRKN rs9355950*C (OR = 0.57, p = 0.0004). Through functional annotation, we found that all associated alleles, with the exception of PRKN rs9355950*C, were previously associated with differential gene expression levels in healthy individuals (mostly in skin and peripheral blood). Further functional validation of these genetic associations may contribute to the understanding of PF etiology and to the development of new drugs and therapeutic regimens for the disease.
Collapse
Affiliation(s)
- Valéria Bumiller-Bini
- Laboratory of Human Molecular Genetics, Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| | - Gabriel Adelman Cipolla
- Laboratory of Human Molecular Genetics, Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| | - Mariana Basso Spadoni
- Laboratory of Human Molecular Genetics, Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| | - Danillo Gardenal Augusto
- Department of Neurology, University of California, San Francisco, San Francisco, CA, United States
| | - Maria Luiza Petzl-Erler
- Laboratory of Human Molecular Genetics, Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| | - Marcia Holsbach Beltrame
- Laboratory of Human Molecular Genetics, Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| | - Angelica Beate Winter Boldt
- Laboratory of Human Molecular Genetics, Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| |
Collapse
|
4
|
Charfi A, Mahfoudh N, Kamoun A, Frikha F, Dammak C, Gaddour L, Hakim F, Maalej L, Mallek B, Kammoun I, Bahloul Z, Makni H. Association of HLA Alleles with Primary Sjögren Syndrome in the South Tunisian Population. Med Princ Pract 2019; 29:32-38. [PMID: 31272097 PMCID: PMC7024883 DOI: 10.1159/000501896] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 07/04/2019] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE In order to investigate human leukocyte antigen (HLA) genes predisposing to primary Sjögren syndrome (pSS), we conducted an association study using HLA loci (A, B, and DRB1) and 9 polymorphic microsatellite markers spanning the HLA region in pSS patients as compared to healthy individuals. SUBJECTS AND METHODS Forty-four patients fitting the European criteria of pSS and 123 healthy controls were analyzed for their HLA class I and class II alleles. HLA class I typing was performed using a standard microlymphocytotoxicity method followed by PCR-SSP. HLA-DRB1 genotyping was performed using PCR-SSP. We studied the polymorphism of 9 microsatellite markers for both groups. Microsatellite genotyping was performed using the PCR fluorescent technique. RESULTS We observed a positive association between HLA-B15 and pSS in the Tunisian population (p = 0.004, OR 7.57). The comparison of the frequencies of DRB1 alleles in pSS patients and controls confirmed the association of the DRB1*03 allele with pSS (p = 0.02, OR 2.36). On the other hand, the association study of microsatellite markers showed that the a9 allele of D6S265 marker and the a20 of C1.2.C were found to be positively associated with pSS as compared to controls (p =0.0003, OR 10.29, and p =0.001, OR 4.79, respectively). Using the "Haplo.stats" software analysis, we found that the most associated region was located in the HLA class I region and limited by HLA-A and D6S265 loci (p = 0.00056). CONCLUSION The results of this study support the hypothesis of the existence of a susceptibility gene for pSS located in the HLA class I and III regions.
Collapse
Affiliation(s)
- Aida Charfi
- Department of Histocompatibility, Hedi Chaker University Hospital, Sfax, Tunisia,
| | - Nadia Mahfoudh
- Department of Histocompatibility, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Arwa Kamoun
- Department of Histocompatibility, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Feten Frikha
- Department of Internal Medicine, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Chifa Dammak
- Department of Internal Medicine, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Lilia Gaddour
- Department of Histocompatibility, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Feiza Hakim
- Department of Histocompatibility, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Leila Maalej
- Department of Histocompatibility, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Bakhta Mallek
- Department of Histocompatibility, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Ines Kammoun
- Department of Histocompatibility, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Zouhir Bahloul
- Department of Internal Medicine, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Hafedh Makni
- Department of Histocompatibility, Hedi Chaker University Hospital, Sfax, Tunisia
| |
Collapse
|
5
|
Masmoudi H, Abida O, Masmoudi A, Turki H. Update on immunogenetics of Tunisian endemic pemphigus foliaceus. J Leukoc Biol 2018; 105:257-265. [DOI: 10.1002/jlb.mr0318-132r] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 10/19/2018] [Accepted: 11/13/2018] [Indexed: 01/15/2023] Open
Affiliation(s)
- Hatem Masmoudi
- Department of ImmunologyAutoimmunity and Immunogentics Resaerch UnitHabib Bourguiba HospitalUniversity of Sfax Sfax Tunisia
| | - Olfa Abida
- Department of ImmunologyAutoimmunity and Immunogentics Resaerch UnitHabib Bourguiba HospitalUniversity of Sfax Sfax Tunisia
| | | | - Hamida Turki
- Department of DermatologyHedi Chaker HospitalUniversity of Sfax Sfax Tunisia
| |
Collapse
|
6
|
Jerbi A, Hachicha H, Feki S, Bahloul E, Sellami K, Abida O, Charfi S, Bouzid A, Sellami Boudawara T, Turki H, Masmoudi A, Masmoudi H. Pemphigus herpetiformis in South Tunisia: a clinical expression of pemphigus foliaceus? Int J Dermatol 2018; 57:1094-1101. [DOI: 10.1111/ijd.14139] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 06/08/2018] [Accepted: 06/12/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Ameni Jerbi
- Immunology Department; Habib Bourguiba Hospital; University of Sfax; Sfax Tunisia
| | - Hend Hachicha
- Immunology Department; Habib Bourguiba Hospital; University of Sfax; Sfax Tunisia
| | - Sawsan Feki
- Immunology Department; Habib Bourguiba Hospital; University of Sfax; Sfax Tunisia
| | - Emna Bahloul
- Dermatology Department; Hedi Chaker Hospital; University of Sfax; Sfax Tunisia
| | - Khadija Sellami
- Dermatology Department; Hedi Chaker Hospital; University of Sfax; Sfax Tunisia
| | - Olfa Abida
- Immunology Department; Habib Bourguiba Hospital; University of Sfax; Sfax Tunisia
| | - Slim Charfi
- Pathology Department; Habib Bourguiba Hospital; University of Sfax; Sfax Tunisia
| | - Amina Bouzid
- Immunology Department; Habib Bourguiba Hospital; University of Sfax; Sfax Tunisia
| | | | - Hamida Turki
- Dermatology Department; Hedi Chaker Hospital; University of Sfax; Sfax Tunisia
| | | | - Hatem Masmoudi
- Immunology Department; Habib Bourguiba Hospital; University of Sfax; Sfax Tunisia
| |
Collapse
|
7
|
Involvement of the IL23/Th17 Pathway in the Pathogenesis of Tunisian Pemphigus Foliaceus. Mediators Inflamm 2018; 2018:8206983. [PMID: 30116153 PMCID: PMC6079402 DOI: 10.1155/2018/8206983] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 05/09/2018] [Accepted: 06/05/2018] [Indexed: 12/19/2022] Open
Abstract
Pemphigus foliaceus (PF) is a rare autoimmune skin disease caused by anti-Dsg1 pathogenic autoantibodies. It is considered as a Th2-mediated disease. Likewise, Th17 cells were recently described in the pathogenesis of the disease but their role is still unclear. We aimed to unravel the eventual implication of the IL23/Th17 pathway in the development of PF. A case-control study was conducted on 115 PF patients and 201 healthy controls using PCR-RFLP and AS-PCR methods. SNPs in IL23R, RORγt, IL17A, IL17F, IL17AR, TNFa, and STAT3 genes were genotyped. mRNA expression of IL23R and RORγt was evaluated using Q-PCR. The frequency of circulating Th17 cells was analyzed by flow cytometry. Genetic associations between IL23R>rs11209026, IL17A>rs3748067, IL17F>rs763780, and TNFa>rs1800629 and the susceptibility to PF were reported. Moreover, we revealed a significant increased frequency of circulating CD4+IL17+ cells as well as higher mRNA levels of RORγt and IL23R in PBMCs of patients. However, no significant increase of RORγt and IL23R mRNA expression was observed in lesional skin biopsies. In spite of the little size of specimens, our results provide converging arguments for the contribution of the IL23/Th17 pathway in the pathogenesis of PF.
Collapse
|
8
|
Hachicha H, Mahfoudh N, Fourati H, Elloumi N, Marzouk S, Feki S, Fakhfakh R, Frikha F, Ayadi A, Maatoug A, Gaddour L, Hakim F, Bahloul Z, Makni H, Masmoudi H, Kammoun A. HLA Class III: A susceptibility region to systemic lupus erythematosus in Tunisian population. PLoS One 2018; 13:e0198549. [PMID: 29912900 PMCID: PMC6005577 DOI: 10.1371/journal.pone.0198549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 05/21/2018] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Short tandem repeats (STR) are usually used as informative polymorphic markers for genetic mapping and for disease susceptibility analysis. The involvement of these microsatellite markers localized in the MHC region was reported in many auto-immune diseases. In this study we analyzed for the first time eight polymorphisms of microsatellite loci at the HLA region: D6S291, D6S273, TNFa, b and c, MICA, D6S265 and D6S276, in Tunisian systemic lupus erythematosus (SLE) patients. MATERIALS AND METHODS We performed a case control study in which the microsatellite loci were amplified using specific primers labeled with NED, VIC, PET or 6-FAM and analyzed using GeneScan software 3.7. For the statistical analysis, we used SPSS software and we performed a sub-haplotype scoring test using the haplo.stats software developed in the R language. RESULTS We found that two mean associated regions existed; the most statistically significant encompassed the 3 TNF markers (p = 0.0003, OR = 19.34); the latter covered the DR region. In fact, when scoring haplotypes in 3 marker- sliding windows, the p value increased as we moved away from the TNF region and decreased again when we approached the DRB1 locus. We also established for the first time the negative association between alleles of D6S291 and SLE. The majority of clinical and serological correlations were noted with TNF alleles. CONCLUSION Our results confirm the association between TNF and DRB1 polymorphisms and SLE. The association between alleles of D6S291 and SLE needs however to be verified by the analysis of other markers beyond this region.
Collapse
Affiliation(s)
- Hend Hachicha
- Immunology Department, Habib Bourguiba University Hospital, Sfax, Tunisia
- UR12SP14, Habib Bourguiba University Hospital, Sfax, Tunisia
- Faculty of Medicine of Sfax, University, Sfax, Tunisia
- * E-mail:
| | - Nadia Mahfoudh
- Histocompatibility Department, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Hajer Fourati
- UR12SP14, Habib Bourguiba University Hospital, Sfax, Tunisia
| | - Nesrine Elloumi
- UR12SP14, Habib Bourguiba University Hospital, Sfax, Tunisia
| | - Sameh Marzouk
- Internal Medicine Department, Hedi Chaker University Hospital of Sfax, Sfax, Tunisia
| | - Sawsan Feki
- Immunology Department, Habib Bourguiba University Hospital, Sfax, Tunisia
- UR12SP14, Habib Bourguiba University Hospital, Sfax, Tunisia
| | - Raouia Fakhfakh
- UR12SP14, Habib Bourguiba University Hospital, Sfax, Tunisia
| | - Faten Frikha
- Internal Medicine Department, Hedi Chaker University Hospital of Sfax, Sfax, Tunisia
| | - Abir Ayadi
- UR12SP14, Habib Bourguiba University Hospital, Sfax, Tunisia
| | - Amira Maatoug
- UR12SP14, Habib Bourguiba University Hospital, Sfax, Tunisia
| | - Lilia Gaddour
- Histocompatibility Department, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Feiza Hakim
- Histocompatibility Department, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Zouheir Bahloul
- Internal Medicine Department, Hedi Chaker University Hospital of Sfax, Sfax, Tunisia
| | - Hafedh Makni
- Histocompatibility Department, Hedi Chaker University Hospital, Sfax, Tunisia
| | - Hatem Masmoudi
- Immunology Department, Habib Bourguiba University Hospital, Sfax, Tunisia
- UR12SP14, Habib Bourguiba University Hospital, Sfax, Tunisia
| | - Arwa Kammoun
- Histocompatibility Department, Hedi Chaker University Hospital, Sfax, Tunisia
| |
Collapse
|
9
|
Dauber EM, Wenda S, Schwartz-Jungl EM, Glock B, Mayr WR. Sequence-based definition of eight short tandem repeat loci located within the HLA-region in an Austrian population. Forensic Sci Int Genet 2014; 14:168-73. [PMID: 25450788 DOI: 10.1016/j.fsigen.2014.10.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 09/23/2014] [Accepted: 10/13/2014] [Indexed: 11/29/2022]
Abstract
Sequenced allelic ladders are a prerequisite for reliable genotyping of short tandem repeat (STR) polymorphisms and consistent results across instrument platforms. For eight STR-loci located on the short arm of chromosome 6 (6p21.3), a sequenced based nomenclature was established according to international recommendations. Publicly available reference DNA samples were sequenced enabling interested laboratories to construct their own allelic ladders. Three tetrameric (D6S2691, D6S2678, DQIV), one trimeric (D6S2906) and four dimeric repeat loci (D6S2972, D6S2792, D6S2789, D6S273) were investigated. Apart from the very complex sequence structure at the DQIV locus, three loci showed a compound and four loci a simple repeat pattern. In the flanking regions of some loci additional single nucleotide and insertion/deletion polymorphisms occurred as well as sequence polymorphisms within the repeat region of alleles with the same length. In an Austrian Caucasoid population sample (n=293) between eight and 22 alleles were found. No significant deviation from Hardy-Weinberg expectations was observed, the power of discrimination ranged from 0.826 to 0.978. The loci cover the HLA-coding region from HLA-A to HLA-DQB1 and can be used for a better definition of HLA haplotypes for population and disease association studies, recombination point mapping, haematopoietic stem cell transplantation as well as for identity and relationship testing.
Collapse
Affiliation(s)
- Eva-Maria Dauber
- Department for Blood Group Serology and Transfusion Medicine, Medical University of Vienna, Austria.
| | - Sabine Wenda
- Department for Blood Group Serology and Transfusion Medicine, Medical University of Vienna, Austria
| | | | - Barbara Glock
- Department for Blood Group Serology and Transfusion Medicine, Medical University of Vienna, Austria
| | - Wolfgang R Mayr
- Department for Blood Group Serology and Transfusion Medicine, Medical University of Vienna, Austria
| |
Collapse
|
10
|
Achour Y, Kammoun A, Ben Hamad M, Mahfoudh N, Chaabane S, Marzouk S, Keskes L, Gaddour L, Bahloul Z, Maalej A. Association study of MICA gene polymorphisms with rheumatoid arthritis susceptibility in south Tunisian population. Int J Immunogenet 2014; 41:486-92. [PMID: 25256191 DOI: 10.1111/iji.12146] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 06/11/2014] [Accepted: 07/19/2014] [Indexed: 12/17/2022]
Abstract
The aim of this study was to investigate the role of major histocompatibility complex (MHC) class I chain-related gene A (MICA) polymorphisms, important in natural killer (NK) cell function, in patients with rheumatoid arthritis (RA). A transmembrane (TM) alanine-encoding GCT repeats, termed A4, A5, A5.1, A6 and A9 in the MICA gene, and single-nucleotide polymorphisms (SNPs): the Met129Val polymorphism (rs1051792) and the nonsynonymously coding SNP (rs1051794) were genotyped in 142 patients with RA and 123 unrelated healthy individuals using, respectively, PCR fluorescent method, nested PCR-RFLP and allele specific PCR (ASP). Association was assessed based on the χ2 test, genotype relative risk (GRR) and odds ratio (OR) with 95% confidence intervals (CIs). Our results show a trend of association of the different MICA genotypes G/G, G/A and A/A (P = 0.029) which did not attain the significance after Bonferroni's correction (pc = 0.08). Although, we revealed a significant association of the genotype A/A of MICA-250 in patients with RA compared to healthy controls (pc = 0.033). In contrast, no significant differences between alleles and genotypes frequencies were found either with MICA-TM or MICA met129 val (P > 0.05) in our sample. Moreover, stratification of patients with RA according to clinical and immunological data for the different polymorphisms studied shows a significant association of both MICA-250 G allele (pc = 0.0075) and MICA-250 GG genotype (pc = 0.008) and both allelic (val) (pc = 0.021) and genotypic (val/val) distribution (pc = 0.0095) for MICA met129 val in the RF-positive subgroup compared to RF-negative patients with RA. In contrast, we found a strong association of the MICA-TM A9 allele in RF-negative patients with RA (pc = 0.0003). This study indicates the involvement of the MICA-250 polymorphism in the genetic susceptibility and severity to RA and suggests that variations in MICA-TM and MICA met129 val may have an effect on RA severity in our south Tunisian sample.
Collapse
Affiliation(s)
- Y Achour
- Laboratory of Human Molecular Genetics, Faculty of Medicine, University of Sfax, Sfax, Tunisia
| | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Castro-Martínez XH, Leal-Cortés C, Flores-Martínez SE, García-Zapién AG, Sánchez-Corona J, Portilla-de Buen E, Gómez-Espinel I, Zamora-Ginez I, Pérez-Fuentes R, Islas-Andrade S, Revilla-Monsalve C, Guerrero-Romero F, Rodríguez-Morán M, Mendoza-Carrera F. Tumor necrosis factor haplotype diversity in Mestizo and native populations of Mexico. ACTA ACUST UNITED AC 2014; 83:247-59. [PMID: 24517517 DOI: 10.1111/tan.12300] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Revised: 12/06/2013] [Accepted: 01/06/2014] [Indexed: 11/30/2022]
Abstract
The so-called tumor necrosis factor (TNF) block includes the TNFA, lymphotoxin alpha and beta (LTA and LTB) genes with single-nucleotide polymorphisms (SNP) and microsatellites with an allele frequency that exhibits interpopulation variability. To date, no reports have included both SNPs and microsatellites at the TNF block to study Mestizo or Amerindian populations from Mexico. In this study, samples of five Mexican Mestizo populations (Durango, Guadalajara, Monterrey, Puebla, and Tierra Blanca) and four native-Mexican populations (North Lacandonians, South Lacandonians, Tepehuanos, and Yaquis) were genotyped for two SNPs (LTA+252A>G and TNFA-308G>A) and four microsatellites (TNFa, d, e, and f), to analyze the genetic substructure of the Mexican population. Allele and haplotype frequencies, linkage disequilibrium (LD), and interpopulation genetic relationships were calculated. There was significant LD along almost all of the TNF block but the lowest D' values were observed for the TNFf-TNFd pair. Mestizos showed higher allele and haplotype diversity than did natives. The genetic differentiation level was reduced among Mestizos; however, a slightly, but significant genetic substructure was observed between northern and southern Mexican Mestizos. Among the Amerindian populations, the genetic differentiation level was significantly elevated, particularly in both North and South Lacandonians. Furthermore, among Southern Lacandonians, inhabitants of Lacanja town were the most differentiated from all the Mexicans analyzed. The data presented here will serve as a reference for further population and epidemiological studies including these TNF polymorphisms in the Mexican population.
Collapse
Affiliation(s)
- X H Castro-Martínez
- Molecular Medicine Division, Centro de Investigación Biomédica de Occidente (CIBO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara, Mexico; Doctorate Program in Human Genetics, Universidad de Guadalajara, Guadalajara, Mexico
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|