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Zanoni F, Neugut YD, Obayemi JE, Liu L, Zhang JY, Ratner LE, Cohen DJ, Mohan S, Gharavi AG, Keating B, Kiryluk K. Genetic versus self-reported African ancestry of the recipient and neighborhood predictors of kidney transplantation outcomes in 2 multiethnic urban cohorts. Am J Transplant 2024; 24:1003-1015. [PMID: 38331047 PMCID: PMC11144562 DOI: 10.1016/j.ajt.2024.01.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 01/25/2024] [Accepted: 01/28/2024] [Indexed: 02/10/2024]
Abstract
African American (AA) kidney recipients have a higher risk of allograft rejection and failure compared to non-AAs, but to what extent these outcomes are due to genetic versus environmental effects is currently unknown. Herein, we tested the effects of recipient self-reported race versus genetic proportion of African ancestry (pAFR), and neighborhood socioeconomic status (SES) on kidney allograft outcomes in multiethnic kidney transplant recipients from Columbia University (N = 1083) and the University of Pennsylvania (N = 738). All participants were genotyped with SNP arrays to estimate genetic admixture proportions. US census tract variables were used to analyze the effect of neighborhood factors. In both cohorts, self-reported recipient AA race and pAFR were individually associated with increased risk of rejection and failure after adjustment for known clinical risk factors and neighborhood SES factors. Joint analysis confirmed that self-reported recipient AA race and pAFR were both associated with a higher risk of allograft rejection (AA: HR 1.61 (1.31-1.96), P = 4.05E-06; pAFR: HR 1.90 (1.46-2.48), P = 2.40E-06) and allograft failure (AA: HR 1.52 (1.18-1.97), P = .001; pAFR: HR 1.70 (1.22-2.35), P = .002). Further research is needed to disentangle the role of genetics versus environmental, social, and structural factors contributing to poor transplantation outcomes in kidney recipients of African ancestry.
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Affiliation(s)
- Francesca Zanoni
- Department of Nephrology, Dialysis and Kidney Transplantation, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy; Division of Nephrology, Department of Medicine, Vagelos College of Physicians & Surgeons, Columbia University, New York, New York, USA; Department of Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Y Dana Neugut
- Division of Pediatric Gastroenterology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Joy E Obayemi
- Department of Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Lili Liu
- Division of Nephrology, Department of Medicine, Vagelos College of Physicians & Surgeons, Columbia University, New York, New York, USA
| | - Jun Y Zhang
- Division of Nephrology, Department of Medicine, Vagelos College of Physicians & Surgeons, Columbia University, New York, New York, USA
| | - Lloyd E Ratner
- Department of Surgery, Columbia University, Vagelos College of Physicians & Surgeons, Columbia University, New York, New York, USA
| | - David J Cohen
- Division of Nephrology, Department of Medicine, Vagelos College of Physicians & Surgeons, Columbia University, New York, New York, USA
| | - Sumit Mohan
- Division of Nephrology, Department of Medicine, Vagelos College of Physicians & Surgeons, Columbia University, New York, New York, USA
| | - Ali G Gharavi
- Division of Nephrology, Department of Medicine, Vagelos College of Physicians & Surgeons, Columbia University, New York, New York, USA
| | - Brendan Keating
- Department of Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Krzysztof Kiryluk
- Division of Nephrology, Department of Medicine, Vagelos College of Physicians & Surgeons, Columbia University, New York, New York, USA.
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Wang CM, Tan KP, Wu YJJ, Zheng JW, Wu J, Chen JY. Functional MICA Variants Are Differentially Associated with Immune-Mediated Inflammatory Diseases. Int J Mol Sci 2024; 25:3036. [PMID: 38474281 PMCID: PMC10931785 DOI: 10.3390/ijms25053036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/25/2024] [Accepted: 03/04/2024] [Indexed: 03/14/2024] Open
Abstract
As the principal ligand for NKG2D, MICA elicits the recruitment of subsets of T cells and NK cells in innate immunity. MICA gene variants greatly impact the functionality and expression of MICA in humans. The current study evaluated whether MICA polymorphisms distinctively influence the pathogenesis of psoriasis (PSO), rheumatoid arthritis (RA), and systemic lupus erythematosus (SLE) in Taiwanese subjects. The distributions of MICA alleles and levels of serum soluble NKG2D were compared between healthy controls and patients with PSO, RA, and SLE, respectively. The binding capacities and cell surface densities of MICA alleles were assessed by utilizing stable cell lines expressing four prominent Taiwanese MICA alleles. Our data revealed that MICA*010 was significantly associated with risks for PSO and RA (PFDR = 1.93 × 10-15 and 0.00112, respectively), while MICA*045 was significantly associated with predisposition to SLE (PFDR = 0.0002). On the other hand, MICA*002 was associated with protection against RA development (PFDR = 4.16 × 10-6), while MICA*009 was associated with a low risk for PSO (PFDR = 0.0058). MICA*002 exhibited the highest binding affinity for NKG2D compared to the other MICA alleles. Serum concentrations of soluble MICA were significantly elevated in SLE patients compared to healthy controls (p = 0.01). The lack of cell surface expression of the MICA*010 was caused by its entrapment in the endoplasmic reticulum. As a prevalent risk factor for PSO and RA, MICA*010 is deficient in cell surface expression and is unable to interact with NKG2D. Our study suggests that MICA alleles distinctively contribute to the pathogenesis of PSO, RA, and SLE in Taiwanese people.
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Affiliation(s)
- Chin-Man Wang
- Department of Rehabilitation, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan 33302, Taiwan;
| | - Keng-Poo Tan
- Department of Medicine, Division of Allergy, Immunology and Rheumatology, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan 33305, Taiwan; (K.-P.T.); (Y.-J.J.W.); (J.-W.Z.)
| | - Yeong-Jian Jan Wu
- Department of Medicine, Division of Allergy, Immunology and Rheumatology, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan 33305, Taiwan; (K.-P.T.); (Y.-J.J.W.); (J.-W.Z.)
| | - Jian-Wen Zheng
- Department of Medicine, Division of Allergy, Immunology and Rheumatology, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan 33305, Taiwan; (K.-P.T.); (Y.-J.J.W.); (J.-W.Z.)
| | - Jianming Wu
- Department of Veterinary and Biomedical Sciences, Department of Medicine, University of Minnesota, St. Paul, MN 55108, USA
| | - Ji-Yih Chen
- Department of Medicine, Division of Allergy, Immunology and Rheumatology, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan 33305, Taiwan; (K.-P.T.); (Y.-J.J.W.); (J.-W.Z.)
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Said R, Sellami MH, Kaabi H, Hmida S. Minor histocompatibility antigens HA-8 and PANE1 in the TUNISIAN population. Mol Genet Genomic Med 2022; 10:e2050. [PMID: 36036171 PMCID: PMC9651600 DOI: 10.1002/mgg3.2050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/05/2022] [Accepted: 08/22/2022] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Minor histocompatibility antigens (mHAgs) are endogenous immunogenic peptides initially identified due to complications detected in several contexts of HLA geno-identical hematopoietic stem cell transplantation (HSCT). In this study, we chose to examine the molecular polymorphism of the mHAgs HA-8 and PANE1 in the Tunisian population. MATERIAL AND METHODS This study was conducted on 150 healthy and unrelated individuals. The DNA extraction and Sequence-Specific Primers PCR (PCR-SSP) methods were used for the molecular genotyping of the selected SNPs: PUM3 (rs2173904) and CENPM (rs5758511). RESULTS Our results show that, 94% of Tunisians are carriers of the PANE1R allele (immunogenic variant of the PANE1 mHAg) and 68% of Tunisians are carriers of the HA-8R allele (immunogenic variant of the HA-8 mHAg). Furthermore, this study shows that about 5% of the Tunisians are carrier of the PANE1R antigen and its HLA molecule of presentation (the PANE1R/HLA-A*0301 combination). However, only 2% of Tunisians are carrier of the HA-8R/HLA-A*0201 combination, that is, the HA8 immunogenic variant and its specific HLA molecule of presentation. CONCLUSION Our results are close to those reported in Caucasian, Asiatic, and African populations, this may be explained by the historical events experienced by Tunisia for millennia. These results could be used for further clinical and anthropological studies.
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Affiliation(s)
- Rahma Said
- Department of ImmunohaematologyNational Blood Transfusion Center of TunisTunisTunisia
| | | | - Houda Kaabi
- Department of ImmunohaematologyNational Blood Transfusion Center of TunisTunisTunisia
| | - Slama Hmida
- Department of ImmunohaematologyNational Blood Transfusion Center of TunisTunisTunisia
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Differential gene analysis during the development of obliterative bronchiolitis in a murine orthotopic lung transplantation model: A comprehensive transcriptome-based analysis. PLoS One 2020; 15:e0232884. [PMID: 32384121 PMCID: PMC7209239 DOI: 10.1371/journal.pone.0232884] [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: 09/10/2019] [Accepted: 04/23/2020] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Obliterative bronchiolitis (OB) is a known issue during minor histocompatibility antigen (mHA) disparity during lung transplantation. This study evaluated gene expression in a murine orthotropic lung transplantation model using microarray analysis. METHODS Left lungs from C57BL/10(H-2b) donor mice were transplanted into mHA-mismatched C57BL/6(H-2b) recipient mice. Three groups (OB, non-OB, and sham controls) were confirmed pathologically and analyzed. Gene expression changes in the lung grafts were determined by microarray and immunohistochemical staining, and genes were verified by quantitative PCR in the lungs and mediastinal lymph nodes (LNs). RESULTS A total of 1343 genes were upregulated in the OB lungs compared to the sham group. Significant upregulation was observed for genes related to innate, e.g. Tlr2 and CCL3 and adaptive immunity, e.g. H2-ab1 and Il-21. Positive labeling for MHC class II antigen was observed in the bronchial epithelium of OB accompanied with B cells. We found increased Tlr2, Ccl3, H2-ab1, Il-21, Ighg3, Ifng, and Pdcd1 mRNA expression in the OB lung, and increased Il-21, Ighg3, and Pdcd1 expression in the OB LNs. CONCLUSIONS Adaptive and innate immune reactions were involved in OB after lung transplantation, and genetic examination of related genes could be used for detection of OB.
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Abstract
Abstract
Background: Chronic kidney disease represents a world-wide health problem affecting approximately 195 million women around the world. Risk of development of chronic kidney disease is greater in women; therefore, the World Kidney Day 2018 was dedicated to kidney disease, treatment options, and its specifics in female patients.
Materials and Methods: We retrospectively analysed a cohort of 1,457 patients after kidney transplantation from all transplant centres in Slovakia over a period of ten years from 2005 – 2015.The parameters taken into account were cause of end-stage renal disease (ESRD), outcome of transplantation in a context of differences between the genders.
Results: During the ten-year period there were 557 transplanted women vs. 900 men. Among female recipient the dominant cause of ESRD was tubulointerstitial nephritis (males 22.3% vs. females 32.1%, p < 0.0001), other causes of ESRD where females were significantly more represented than men included polycystic kidney disease (males 11.6% vs. females 17.6%, p = 0.0013) and systemic lupus erythematosus (males 0.2% vs. females 2.3 %, p = 0.0001). There was no significant difference in 12-month, 5-year, and 10-year both graft and patient survival rates between men and women. Female recipients wait for kidney transplantation significantly longer in spite of comparable time spent on dialysis (males 32.9 months vs. females 39.4 months, p < 0.0001).
Conclusion: Despite comparable patient and graft survival rates in male and female recipients in our study there are other studies showing that gender as well as gender mismatch significantly influence the outcomes of transplantation.
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Single Nucleotide Polymorphisms in Renal Transplantation: Cannot See the Wood for the Trees. Transplantation 2019; 103:2464-2465. [PMID: 30768567 DOI: 10.1097/tp.0000000000002661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wang L, Wang X, Qu HY, Jiang S, Zhang J, Fu L, Buggs J, Pang B, Wei J, Liu R. Role of Kidneys in Sex Differences in Angiotensin II-Induced Hypertension. Hypertension 2017; 70:1219-1227. [PMID: 29061720 DOI: 10.1161/hypertensionaha.117.10052] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 08/10/2017] [Accepted: 09/26/2017] [Indexed: 12/31/2022]
Abstract
The significance of kidneys in regulation of sodium and water balance and hemodynamics has been demonstrated both in patients and animal models. In the present study, we tested our hypothesis that kidneys play an essential role in control of sex differences in angiotensin II (Ang II)-dependent hypertension. Kidney transplantations (KTXs) were performed between male (M) and female (F) C57BL/6 mice (donor→recipient: F→F, M→M, F→M, and M→F). Radiotelemetry transmitters were implanted for measurement of mean arterial pressure during the infusion of Ang II (600 ng·kg-1·min-1). Gene expressions and inflammatory responses in the transplanted grafts were assessed. We found that same-sex-KTX mice still exhibited sex differences in Ang II-dependent hypertension (31.3±0.8 mm Hg in M→M versus 12.2±0.6 mm Hg in F→F), which were reduced between males and females when they received kidneys of the opposite sex (32.9±1 mm Hg in M→F versus 22.3±0.7 mm Hg in F→M). The sex differences in gene expressions, including AT1R (angiotensin II receptor, type 1), AT1R/AT2R, ET-1 (endothelin-1), ETA (endothelin receptor type A), NHE3 (sodium-hydrogen exchanger 3), α-ENaC (α-epithelial sodium channel), and γ-ENaC, were unaltered in same-sex KTXs and much lessened in cross-sex KTXs. In addition, the cross-sex KTXs exhibited more robust inflammatory responses reflected by higher expression of IL-6 (interleukin 6), TNFα (tumor necrosis factor α), and KC (keratinocyte-derived chemokine) than same-sex KTX. Our results indicate that kidneys play an essential role in sex differences of Ang II-dependent hypertension. KTX of male kidneys to females augmented the blood pressure response, whereas KTX of female kidneys to males attenuated the blood pressure response. The host's extrarenal systems modulate expressions of many genes and inflammatory response, which may also contribute to the sex differences in blood pressure regulation.
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Affiliation(s)
- Lei Wang
- From the Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa (L.W., X.W., H.Y.Q., S.J., J.Z., B.P., J.W., R.L.); and Pathology (L.F.) and Tampa General Medical Group Transplant Surgery (J.B.), Tampa General Hospital, FL.
| | - Ximing Wang
- From the Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa (L.W., X.W., H.Y.Q., S.J., J.Z., B.P., J.W., R.L.); and Pathology (L.F.) and Tampa General Medical Group Transplant Surgery (J.B.), Tampa General Hospital, FL
| | - Helena Y Qu
- From the Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa (L.W., X.W., H.Y.Q., S.J., J.Z., B.P., J.W., R.L.); and Pathology (L.F.) and Tampa General Medical Group Transplant Surgery (J.B.), Tampa General Hospital, FL
| | - Shan Jiang
- From the Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa (L.W., X.W., H.Y.Q., S.J., J.Z., B.P., J.W., R.L.); and Pathology (L.F.) and Tampa General Medical Group Transplant Surgery (J.B.), Tampa General Hospital, FL
| | - Jie Zhang
- From the Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa (L.W., X.W., H.Y.Q., S.J., J.Z., B.P., J.W., R.L.); and Pathology (L.F.) and Tampa General Medical Group Transplant Surgery (J.B.), Tampa General Hospital, FL
| | - Liying Fu
- From the Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa (L.W., X.W., H.Y.Q., S.J., J.Z., B.P., J.W., R.L.); and Pathology (L.F.) and Tampa General Medical Group Transplant Surgery (J.B.), Tampa General Hospital, FL
| | - Jacentha Buggs
- From the Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa (L.W., X.W., H.Y.Q., S.J., J.Z., B.P., J.W., R.L.); and Pathology (L.F.) and Tampa General Medical Group Transplant Surgery (J.B.), Tampa General Hospital, FL
| | - Bo Pang
- From the Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa (L.W., X.W., H.Y.Q., S.J., J.Z., B.P., J.W., R.L.); and Pathology (L.F.) and Tampa General Medical Group Transplant Surgery (J.B.), Tampa General Hospital, FL
| | - Jin Wei
- From the Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa (L.W., X.W., H.Y.Q., S.J., J.Z., B.P., J.W., R.L.); and Pathology (L.F.) and Tampa General Medical Group Transplant Surgery (J.B.), Tampa General Hospital, FL
| | - Ruisheng Liu
- From the Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa (L.W., X.W., H.Y.Q., S.J., J.Z., B.P., J.W., R.L.); and Pathology (L.F.) and Tampa General Medical Group Transplant Surgery (J.B.), Tampa General Hospital, FL
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Wang L, Song J, Wang S, Buggs J, Chen R, Zhang J, Wang L, Rong S, Li W, Wei J, Liu R. Cross-sex transplantation alters gene expression and enhances inflammatory response in the transplanted kidneys. Am J Physiol Renal Physiol 2017; 313:F326-F338. [PMID: 28515172 DOI: 10.1152/ajprenal.00039.2017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 05/01/2017] [Accepted: 05/12/2017] [Indexed: 02/03/2023] Open
Abstract
Kidney transplantation (KTX) is a life-saving procedure for patients with end-stage renal disease. Expression levels of many genes in the kidney vary between males and females, which may play an essential role in the sex differences in graft function. However, whether these differences are affected after cross-sex-KTX is unknown. In the present study, we assessed postoperative changes in genotype, function, and inflammatory responses of the grafts in same-sex- and cross-sex-KTX. Single kidney transplants were performed between same and different sex C57BL/6 mice paired into four combination groups: female donor/female recipient (F/F); male donor/male recipient (M/M); female donor/male recipient (F/M); and male donor/female recipient (M/F). The remnant native kidney was removed 4 days posttransplant. Expression levels of genes related to the contractility of the afferent arteriole and tubular sodium reabsorption were assessed. Same-sex-KTX did not significantly alter the magnitude or sex difference pattern of gene expression in male or female grafts. Cross-sex-KTX showed an attenuated sex difference in gene expressions. The measurements of endothelin 1, endothelin ETA receptor, Na+-K--2Cl cotransporter 2 (NKCC2), and epithelial Na+ channels (ENaC) subunits exhibited decreases in M/F compared with M/M and increases in F/M compared with F/F. There were no significant differences in hemodynamics or sodium excretion in response to acute volume expansion for any sex combinations. Cross-sex-KTX stimulated more robust inflammatory responses than same-sex-KTX. IL-6 and KC mRNA levels elevated 5- to 20-fold in cross-sex-KTX compared with same-sex-KTX. In conclusion, cross-sex-KTX alters gene expression levels and induces inflammatory responses, which might play an important role in long-term graft function.
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Affiliation(s)
- Lei Wang
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida;
| | - Jiangping Song
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida.,State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Xi Cheng District, Beijing, China
| | - Shaohui Wang
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida
| | | | - Rongjun Chen
- Department of Nephrology, Hannover Medical School, Hannover, Germany
| | - Jie Zhang
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida
| | - Liqing Wang
- State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Xi Cheng District, Beijing, China
| | - Song Rong
- Department of Nephrology, Hannover Medical School, Hannover, Germany
| | - Wenbin Li
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida
| | - Jin Wei
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida
| | - Ruisheng Liu
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida
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Kemna M, Albers E, Bradford MC, Law S, Permut L, McMullan DM, Law Y. Impact of donor-recipient sex match on long-term survival after heart transplantation in children: An analysis of 5797 pediatric heart transplants. Pediatr Transplant 2016; 20:249-55. [PMID: 26690968 DOI: 10.1111/petr.12649] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/03/2015] [Indexed: 11/30/2022]
Abstract
The effect of donor-recipient sex matching on long-term survival in pediatric heart transplantation is not well known. Adult data have shown worse survival when male recipients receive a sex-mismatched heart, with conflicting results in female recipients. We analyzed 5795 heart transplant recipients ≤ 18 yr in the Scientific Registry of Transplant Recipients (1990-2012). Recipients were stratified based on donor and recipient sex, creating four groups: MM (N = 1888), FM (N = 1384), FF (N = 1082), and MF (N = 1441). Males receiving sex-matched donor hearts had increased unadjusted allograft survival at five yr (73.2 vs. 71%, p = 0.01). However, this survival advantage disappeared with longer follow-up and when adjusted for additional risk factors by multivariable Cox regression analysis. In contrast, for females, receiving a sex-mismatched heart was associated with an 18% higher risk of allograft loss over time compared to receiving a sex-matched heart (HR 1.18, 95% CI: 1.00-1.38) and a 26% higher risk compared to sex-matched male recipients (HR 1.26, 95% CI: 1.10-1.45). Females who receive a heart from a male donor appear to have a distinct long-term survival disadvantage compared to all other groups.
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Affiliation(s)
- Mariska Kemna
- Division of Pediatric Cardiology, Seattle Children's Hospital, University of Washington, Seattle, WA, USA
| | - Erin Albers
- Division of Pediatric Cardiology, Seattle Children's Hospital, University of Washington, Seattle, WA, USA
| | - Miranda C Bradford
- Core for Biomedical Statistics, Seattle Children's Hospital, Seattle, WA, USA
| | - Sabrina Law
- Division of Pediatric Cardiology, Columbia University College of Physicians and Surgeons, New York, NY, USA
| | - Lester Permut
- Division of Pediatric Cardiothoracic Surgery, Seattle Children's Hospital, University of Washington, Seattle, WA, USA
| | - D Mike McMullan
- Division of Pediatric Cardiothoracic Surgery, Seattle Children's Hospital, University of Washington, Seattle, WA, USA
| | - Yuk Law
- Division of Pediatric Cardiology, Seattle Children's Hospital, University of Washington, Seattle, WA, USA
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Kwak HH, Park KM, Nam HS, Park SM, Woo HM. Disparate hypervariable region-1 of mitochondrial DNA did not induce skin allograft rejection in cloned porcine models. Transplant Proc 2014; 45:1787-91. [PMID: 23769044 DOI: 10.1016/j.transproceed.2013.01.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Accepted: 01/15/2013] [Indexed: 10/26/2022]
Abstract
INTRODUCTION Alloantigen recognition in skin transplantation is the bane for surgeons. Several studies have mainly focused on the immunogenicity of major histocompatibility (MHC) antigens and H-Y minor histocompatibility antigens. However, the roles of the mitochondrial DNA (mtDNA) encorded miHA have not been identified. Therefore, we sought to address the antigenicity of the hypervariable region 1 (HV-1) of mtDNA in skin transplantation using cloned pig models. METHODS Swine leukocyte antigen and HV-1 of mtDNA were analyzed using sequencing methods. Skin transplantation was performed between MHC-matched, mtDNA-mismatched cloned miniature pigs. Full-thickness skin was grafted between cloned pigs without any immunosuppressants. The grafted tissues were observed for 3 months and evaluated histologically. RESULTS The cloned pigs shared identical MHC but mtDNA mismatched at 9 positions. Skin grafts between the cloned pigs were accepted and hair growth maintained, whereas MHC-mismatched grafts showed acute rejection within 7 days after transplantation and were replaced by hairless scar tissue. CONCLUSIONS HV-1 disparate skin grafts were not recognized as alloantigenic by MHC-matched cloned pigs.
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Affiliation(s)
- H-H Kwak
- Stem Cell Institute, Kangwon National University, ChunCheon, Gangwon-do, Korea
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Shaharuddin B, Ahmad S, Meeson A, Ali S. Concise review: immunological properties of ocular surface and importance of limbal stem cells for transplantation. Stem Cells Transl Med 2013; 2:614-24. [PMID: 23817133 DOI: 10.5966/sctm.2012-0143] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cornea transplantation has been considered to be different from other solid organ transplantation because of the assumed immune-privileged state of the anterior chamber of the eye. Three major lines of thought regarding the molecular mechanisms of immune privilege in the eye are as follows: (a) anatomical, cellular, and molecular barriers in the eye; (b) anterior chamber-associated immune deviation; and (c) immunosuppressive microenvironment in the eye. However, cornea transplants suffer allograft rejection when breached by vascularization. In recent developments, cellular corneal transplantation from cultivated limbal epithelial cells has shown impressive advances as a future therapy. The limbal stem cell niche contains stem cells that promote proliferation and migration and have immunosuppressive mechanisms to protect them from immunological reactions. Limbal stem cells are also noted to display an enhanced expression of genes for the antiapoptotic proteins, a property that is imperative for the survival of transplanted tissues. Further investigation of the molecular mechanisms regulating the immune regulation of limbal stem cells is relevant in the clinical setting to promote the survival of whole corneal and limbal stem cell transplantation.
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Affiliation(s)
- Bakiah Shaharuddin
- Institute of Genetic Medicine, Newcastle University, Newcastle-Upon-Tyne, United Kingdom
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