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Banki K, Perl A. Cell type-specific regulation of the pentose phosphate pathway during development and metabolic stress-driven autoimmune diseases: Relevance for inflammatory liver, renal, endocrine, cardiovascular and neurobehavioral comorbidities, carcinogenesis, and aging. Autoimmun Rev 2025; 24:103781. [PMID: 40010622 DOI: 10.1016/j.autrev.2025.103781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2025] [Revised: 02/19/2025] [Accepted: 02/20/2025] [Indexed: 02/28/2025]
Abstract
The pathogenesis of autoimmunity is incompletely understood which limits the development of effective therapies. New compelling evidence indicates that the pentose phosphate pathway (PPP) profoundly regulate lineage development in the immune system that are influenced by genetic and environmental factors during metabolic stress underlying the development of autoimmunity. The PPP provides two unique metabolites, ribose 5-phosphate for nucleotide biosynthesis in support of cell proliferation and NADPH for protection against oxidative stress. The PPP operates two separate branches, oxidative (OxPPP) and non-oxidative (NOxPPP). While the OxPPP functions in all organisms, the NOxPPP reflects adaptation to niche-specific metabolic requirements. The OxPPP primarily depends on glucose 6-phosphate dehydrogenase (G6PD), whereas transaldolase (TAL) controls the rate and directionality of metabolic flux though the NOxPPP. G6PD is essential for normal development but its partial deficiency protects from malaria. Although men and mice lacking TAL develop normally, they exhibit liver cirrhosis progressing to hepatocellular carcinoma. Mechanistic target of rapamycin-dependent loss of paraoxonase 1 drives autoimmunity and cirrhosis in TAL deficiency, while hepatocarcinogenesis hinges on polyol pathway activation via aldose reductase (AR). Accumulated polyols, such as erythritol, xylitol, and sorbitol, which are commonly used as non-caloric sweeteners, may act as pro-inflammatory oncometabolites under metabolic stress, such as TAL deficiency. The TAL/AR axis is identified as a checkpoint of pathogenesis and target for treatment of metabolic stress-driven systemic autoimmunity with relevance for inflammatory liver, renal and cardiovascular disorders, diabetes, carcinogenesis, and aging.
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Affiliation(s)
- Katalin Banki
- Departments of Medicine, Microbiology and Immunology, Biochemistry and Molecular Biology, and Pathology, State University of New York Upstate Medical University, Norton College of Medicine, 750 East Adams Street, Syracuse, NY 13210, USA
| | - Andras Perl
- Departments of Medicine, Microbiology and Immunology, Biochemistry and Molecular Biology, and Pathology, State University of New York Upstate Medical University, Norton College of Medicine, 750 East Adams Street, Syracuse, NY 13210, USA.
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Essouma M, Noubiap JJ. Lupus and other autoimmune diseases: Epidemiology in the population of African ancestry and diagnostic and management challenges in Africa. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. GLOBAL 2024; 3:100288. [PMID: 39282618 PMCID: PMC11399606 DOI: 10.1016/j.jacig.2024.100288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 02/15/2024] [Accepted: 02/23/2024] [Indexed: 09/19/2024]
Abstract
Autoimmune diseases are prevalent among people of African ancestry living outside Africa. However, the burden of autoimmune diseases in Africa is not well understood. This article provides a global overview of the current burden of autoimmune diseases in individuals of African descent. It also discusses the major factors contributing to autoimmune diseases in this population group, as well as the challenges involved in diagnosing and managing autoimmune diseases in Africa.
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Affiliation(s)
- Mickael Essouma
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Cameroon
| | - Jean Jacques Noubiap
- Division of Cardiology, Department of Medicine, University of California-San Francisco, San Francisco, Calif
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3
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Buckner JH. Translational immunology: Applying fundamental discoveries to human health and autoimmune diseases. Eur J Immunol 2023; 53:e2250197. [PMID: 37101346 PMCID: PMC10600327 DOI: 10.1002/eji.202250197] [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: 01/04/2023] [Revised: 03/10/2023] [Accepted: 04/25/2023] [Indexed: 04/28/2023]
Abstract
Studying the human immune system is challenging. These challenges stem from the complexity of the immune system itself, the heterogeneity of the immune system between individuals, and the many factors that lead to this heterogeneity including the influence of genetics, environment, and immune experience. Studies of the human immune system in the context of disease are increased in complexity as multiple combinations and variations in immune pathways can lead to a single disease. Thus, although individuals with a disease may share clinical features, the underlying disease mechanisms and resulting pathophysiology can be diverse among individuals with the same disease diagnosis. This has consequences for the treatment of diseases, as no single therapy will work for everyone, therapeutic efficacy varies among patients, and targeting a single immune pathway is rarely 100% effective. This review discusses how to address these challenges by identifying and managing the sources of variation, improving access to high-quality, well-curated biological samples by building cohorts, applying new technologies such as single-cell omics and imaging technologies to interrogate samples, and bringing to bear computational expertise in conjunction with immunologists and clinicians to interpret those results. The review has a focus on autoimmune diseases, including rheumatoid arthritis, MS, systemic lupus erythematosus, and type 1 diabetes, but its recommendations are also applicable to studies of other immune-mediated diseases.
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Affiliation(s)
- Jane H Buckner
- Center for Translational Immunology, Benaroya Research Institute, Virginia Mason Hospital, Seattle, WA, USA
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4
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Frazzei G, van Vollenhoven RF, de Jong BA, Siegelaar SE, van Schaardenburg D. Preclinical Autoimmune Disease: a Comparison of Rheumatoid Arthritis, Systemic Lupus Erythematosus, Multiple Sclerosis and Type 1 Diabetes. Front Immunol 2022; 13:899372. [PMID: 35844538 PMCID: PMC9281565 DOI: 10.3389/fimmu.2022.899372] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 05/30/2022] [Indexed: 12/16/2022] Open
Abstract
The preclinical phase of autoimmune disorders is characterized by an initial asymptomatic phase of varying length followed by nonspecific signs and symptoms. A variety of autoimmune and inflammatory manifestations can be present and tend to increase in the last months to years before a clinical diagnosis can be made. The phenotype of an autoimmune disease depends on the involved organs, the underlying genetic susceptibility and pathophysiological processes. There are different as well as shared genetic or environmental risk factors and pathophysiological mechanisms between separate diseases. To shed more light on this, in this narrative review we compare the preclinical disease course of four important autoimmune diseases with distinct phenotypes: rheumatoid arthritis (RA), Systemic Lupus Erythematosus (SLE), multiple sclerosis (MS) and type 1 diabetes (T1D). In general, we observed some notable similarities such as a North-South gradient of decreasing prevalence, a female preponderance (except for T1D), major genetic risk factors at the HLA level, partly overlapping cytokine profiles and lifestyle risk factors such as obesity, smoking and stress. The latter risk factors are known to produce a state of chronic systemic low grade inflammation. A central characteristic of all four diseases is an on average lengthy prodromal phase with no or minor symptoms which can last many years, suggesting a gradually evolving interaction between the genetic profile and the environment. Part of the abnormalities may be present in unaffected family members, and autoimmune diseases can also cluster in families. In conclusion, a promising strategy for prevention of autoimmune diseases might be to address adverse life style factors by public health measures at the population level.
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Affiliation(s)
- Giulia Frazzei
- Department of Rheumatology and Clinical Immunology, Amsterdam Rheumatology and Immunology Centre, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
- Department of Experimental Immunology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
- *Correspondence: Giulia Frazzei,
| | - Ronald F. van Vollenhoven
- Department of Rheumatology and Clinical Immunology, Amsterdam Rheumatology and Immunology Centre, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
- Amsterdam Rheumatology Center, Amsterdam, Netherlands
| | - Brigit A. de Jong
- Department of Neurology, MS Center Amsterdam, Amsterdam University Medical Center (UMC), Vrije Universiteit Amsterdam, Amsterdam Neuroscience, Amsterdam, Netherlands
| | - Sarah E. Siegelaar
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Dirkjan van Schaardenburg
- Department of Rheumatology and Clinical Immunology, Amsterdam Rheumatology and Immunology Centre, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
- Amsterdam Rheumatology and Immunology Center, Reade, Amsterdam, Netherlands
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5
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The Autoantigen Repertoire and the Microbial RNP World. Trends Mol Med 2021; 27:422-435. [PMID: 33722441 DOI: 10.1016/j.molmed.2021.02.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/30/2021] [Accepted: 02/13/2021] [Indexed: 02/08/2023]
Abstract
Although autoimmunity and autoimmune disease (AID) are relatively common, the repertoire of autoantigens is paradoxically very limited. Highly enriched in this autoantigen repertoire are nucleic acids and their binding proteins, which together form large macromolecular structures. Most of these complexes are of ancient evolutionary origin, with homologs throughout multiple kingdoms of life. Why and if these nucleic acid-protein particles drive the development of autoimmunity remains unresolved. Recent advances in our understanding of the microbiome may provide clues about the origins of autoimmunity - and the particular puzzle of why the autoantigen repertoire is so particularly enriched in ribonucleoprotein particles (RNPs). We discuss the possibility that autoimmunity to some RNPs may arise from molecular mimicry to microbial orthologs.
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From incomplete to complete systemic lupus erythematosus; A review of the predictive serological immune markers. Semin Arthritis Rheum 2020; 51:43-48. [PMID: 33360229 DOI: 10.1016/j.semarthrit.2020.11.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 11/06/2020] [Accepted: 11/12/2020] [Indexed: 01/27/2023]
Abstract
Systemic lupus erythematosus (SLE) is a complex and heterogeneous autoimmune disease. A main challenge faced by clinicians is early identification of SLE, frequently resulting in diagnostic delay. Timely treatment, however, is important to limit disease progression, and prevent organ damage and mortality. Often, patients present with clinical symptoms and immunologic abnormalities suggestive of SLE, while not meeting classification criteria yet. This is referred to as incomplete SLE (iSLE). However, not all these patients will develop SLE. Therefore, there is need for predictive biomarkers that can distinguish patients at high risk of developing SLE, in order to allow early treatment. This article reviews the current literature on immunological changes in patients with stages preceding SLE, focusing on autoantibodies, type-I and -II interferons, and the complement system. We also provide an overview of possible predictive markers for progression to SLE that are applicable in daily clinical practice.
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Rodríguez-Lago I, Zabana Y, Barreiro-de Acosta M. Diagnosis and natural history of preclinical and early inflammatory bowel disease. Ann Gastroenterol 2020; 33:443-452. [PMID: 32879589 PMCID: PMC7406806 DOI: 10.20524/aog.2020.0508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 05/24/2020] [Indexed: 12/18/2022] Open
Abstract
Inflammatory bowel disease is a chronic and progressive disorder of the
gastrointestinal tract. A relevant proportion of patients develop complicated
lesions, defined as strictures, fistulas and/or abscesses already at diagnosis,
and this proportion increases over time. The preclinical phase defines the
period of time from the appearance of the first immune disturbances until the
development of overt disease, and it may be present months to years before the
diagnosis. Multiple biomarkers (e.g., C-reactive protein, interleukin-6, fecal
calprotectin) and cellular mechanisms (e.g., complement cascade, lysosomes,
innate immunity, and glycosaminoglycan metabolism) are already altered during
this period. Research in this area allows the description of the initial immune
disturbances that may identify potential targets and lead to the development of
new drug therapies. During this period, different interventions in high-risk
individuals, including drugs or environmental factors, will open the possibility
of innovative strategies focused on the reduction of complications, or even
prevention trials for inflammatory bowel disease. Here, we review the most
relevant findings regarding the characteristics, prevalence and biomarkers
associated with preclinical disease, along with their possible use in our future
clinical practice.
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Affiliation(s)
- Iago Rodríguez-Lago
- Gastroenterology Department, Hospital de Galdakao and Biocruces Bizkaia Health Research Institute, Galdakao (Iago Rodríguez-Lago)
| | - Yamile Zabana
- Gastroenterology Department, Hospital Universitari Mútua Terrassa, Terrassa (Yamile Zabana).,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd) (Yamile Zabana)
| | - Manuel Barreiro-de Acosta
- Gastroenterology Department, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela (Manuel Barreiro-de Acosta), Spain
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Pisetsky DS. Evolving story of autoantibodies in systemic lupus erythematosus. J Autoimmun 2020; 110:102356. [PMID: 31810857 PMCID: PMC8284812 DOI: 10.1016/j.jaut.2019.102356] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 11/01/2019] [Indexed: 01/02/2023]
Abstract
Systemic lupus erythematosus (SLE) is a prototypic autoimmune disease characterized by antinuclear antibody (ANA) production. ANAs bind to DNA, RNA and complexes of proteins and nucleic acids and are important markers for diagnosis and activity. According to current models, ANAs originate from antigen-driven processes; nevertheless, antibody responses to both DNA and RNA binding proteins display features unexpected in terms of current paradigms for antigenicity. These differences may reflect disturbances in both B and T cells critical for autoreactivity. Clinically, ANA testing has new uses for determining classification as well as assessing eligibility for clinical trials. Studies of patients with established disease show frequent seronegativity. In this setting, seronegativity may indicate a stage of disease called post-autoimmunity in which the natural history of disease or effects of immunosuppressive therapies modifies responses. The new uses of ANA testing highlight the importance of understanding autoantigenicity and developing sensitive and informative assays for clinical assessments.
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Affiliation(s)
- David S Pisetsky
- Division of Rheumatology and Immunology, Duke University Medical Center and Medical Research Service, Durham Veterans Administration Medical Center, Durham, NC, USA.
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Chen Y, Yang M, Long D, Li Q, Zhao M, Wu H, Lu Q. Abnormal expression of BAFF and its receptors in peripheral blood and skin lesions from systemic lupus erythematosus patients. Autoimmunity 2020; 53:192-200. [PMID: 32157911 DOI: 10.1080/08916934.2020.1736049] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease that is characterized by abnormal T and B cells. B-cell activating factor (BAFF) has been suggested to play a crucial role in lupus by promoting the proliferation, differentiation, and survival of B cells. Increased serum levels of BAFF have been found in patients with lupus. However, the expression of BAFF and its receptors on immune cells and in skin has not been systematically reported before. Here, we report that SLE patients showed increased levels of BAFF on circulating CD3+ T cells and B-cell maturation antigen (BCMA) on CD14+ monocytes and dramatically increased expression of BAFF in lupus skin lesions compared with those of healthy controls. TACI was undetectable on circulating immune cells. An increased serum level of BAFF was also confirmed in lupus patients in this study. Our findings may provide a better understanding of the pathogenesis and predictors of BAFF antibody treatment response, as well as potential targets for skin therapies.
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Affiliation(s)
- Yongjian Chen
- Hunan Key Laboratory of Medical Epigenomics, Department of Dermatology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Ming Yang
- Hunan Key Laboratory of Medical Epigenomics, Department of Dermatology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Di Long
- Hunan Key Laboratory of Medical Epigenomics, Department of Dermatology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Qianwen Li
- Hunan Key Laboratory of Medical Epigenomics, Department of Dermatology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Ming Zhao
- Hunan Key Laboratory of Medical Epigenomics, Department of Dermatology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Haijing Wu
- Hunan Key Laboratory of Medical Epigenomics, Department of Dermatology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Qianjin Lu
- Hunan Key Laboratory of Medical Epigenomics, Department of Dermatology, The Second Xiangya Hospital of Central South University, Changsha, China
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Gatto M, Saccon F, Zen M, Iaccarino L, Doria A. Preclinical and early systemic lupus erythematosus. Best Pract Res Clin Rheumatol 2019; 33:101422. [PMID: 31810542 DOI: 10.1016/j.berh.2019.06.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The challenge of early diagnosis and treatment is a timely issue in the management of systemic lupus erythematosus (SLE), as autoimmunity starts earlier than its clinical manifestations. Hence, growing efforts for stratification of patients according to the individual risk of developing specific clinical manifestations and/or predicting a better response to a given treatment have led to the proposal of several biomarkers, which require validation for use in clinical practice. In this viewpoint, we aim at distinguishing and discussing the features and the approach to asymptomatic immunological abnormalities potentially heralding the development of SLE, defined as preclinical lupus, and clinical manifestations consistent with SLE not yet fulfilling classification criteria, defined as early lupus. In case of preclinical SLE, careful surveillance using available screening tools is paramount, while patients with early lupus deserve an appropriate and timely diagnosis and, consequently, a proper treatment including hydroxychloroquine as the anchor drug.
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Affiliation(s)
- Mariele Gatto
- Division of Rheumatology, Department of Medicine, University of Padova, Italy
| | - Francesca Saccon
- Division of Rheumatology, Department of Medicine, University of Padova, Italy
| | - Margherita Zen
- Division of Rheumatology, Department of Medicine, University of Padova, Italy
| | - Luca Iaccarino
- Division of Rheumatology, Department of Medicine, University of Padova, Italy
| | - Andrea Doria
- Division of Rheumatology, Department of Medicine, University of Padova, Italy.
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Hu X, Liu H, Du J, Chen Y, Yang M, Xie Y, Chen J, Yan S, Ouyang S, Gong Z. The clinical significance of plasma CFHR 1-5 in lupus nephropathy. Immunobiology 2019; 224:339-346. [PMID: 30975435 DOI: 10.1016/j.imbio.2019.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 03/28/2019] [Accepted: 03/28/2019] [Indexed: 10/27/2022]
Abstract
A deficiency of complement factor H may lead to excessive consumption of C3 and an increase in C3b deposition, which are important pathological characteristics of lupus nephritis. Complement factor H-related proteins (CFHRs), comprising CFHR1 to CFHR5 (CFHR1-5), are members of the wider factor H/CFHR family. Their role in lupus nephritis remains unclear. In this study, we compared circulating levels of CFHR1-5 in 152 patients diagnosed with lupus nephritis and 20 unrelated healthy individuals to explore the relationship between the expression of CFHR1-5 and development of the disease. We found that plasma levels of CFHR3 and CFHR5 were higher in patients with lupus nephritis than in healthy individuals; also, CFHR3 and CFHR5 concentrations increased with increasing systemic lupus erythematosus disease activity index (SLEDAI) values (P < 0.05). Pearson's and Spearman's correlation test results confirmed that plasma CFHR3 and CFHR5 levels in lupus nephritis patients were positively correlated with proteinuria and levels of creatinine (Cr) and anti-dsDNA (correlation coefficients = 0.491-0.717, P < 0.05), while they were negatively correlated with plasma C3 levels and eGFR [correlation coefficients = -(0.706-0.788), P < 0.05]. Receiver operating characteristic (ROC) curve analysis results confirmed that plasma CFHR3 and CFHR5 levels were predictive of SLEDAI values and disease end points (area under the curve = 0.664-0.884, P < 0.05), with patients with both high CFHR3 and high CFHR5 exhibiting the shortest progression-free survival. Thus, both CFHR3 and CFHR5 are of prognostic value in lupus nephritis status.
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Affiliation(s)
- Xiaofang Hu
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China; National Clinical Research Center for Geriatric Disorders (Xiangya), Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Hengdao Liu
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 410013, China
| | - Jie Du
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China; National Clinical Research Center for Geriatric Disorders (Xiangya), Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Ying Chen
- Department of Nephrology, Hunan Provincial People's Hospital, The first-affiliated hospital of Hunan normal university, Changsha, Hunan, 410005, China
| | - Ming Yang
- Department of Nephrology, The Affiliated Zhu Zhou Hospital Xiangya Medical College, Central South University, Zhuzhou Hunan 412007, China
| | - Yuhong Xie
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China; National Clinical Research Center for Geriatric Disorders (Xiangya), Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Juan Chen
- Department of Nephrology, Hunan Provincial People's Hospital, The first-affiliated hospital of Hunan normal university, Changsha, Hunan, 410005, China
| | - Siyuan Yan
- Department of Nephrology, Hunan Provincial People's Hospital, The first-affiliated hospital of Hunan normal university, Changsha, Hunan, 410005, China
| | - Shaxi Ouyang
- Department of Nephrology, Hunan Provincial People's Hospital, The first-affiliated hospital of Hunan normal university, Changsha, Hunan, 410005, China.
| | - Zhicheng Gong
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China; National Clinical Research Center for Geriatric Disorders (Xiangya), Xiangya Hospital, Central South University, Changsha 410008, Hunan, China.
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