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Wu S, Huang K, Chang C, Chu X, Zhang K, Li B, Yang T. Serum Proteomic Profiling in Patients with Chronic Obstructive Pulmonary Disease. Int J Chron Obstruct Pulmon Dis 2023; 18:1623-1635. [PMID: 37533772 PMCID: PMC10392904 DOI: 10.2147/copd.s413924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 07/03/2023] [Indexed: 08/04/2023] Open
Abstract
Purpose Chronic obstructive pulmonary disease (COPD) is a heterogeneous disease with high morbidity and mortality rates. This study used proteomic profiling of serum to identify the differentially expressed proteins in COPD patients compared with healthy controls, to expand the knowledge of COPD pathogenesis and to ascertain potential new targets for diagnosis and treatment of COPD. Methods Serum samples were collected from 56 participants (COPD group n = 28; Healthy Control group n = 28). A data-independent acquisition quantitative proteomics approach was used to identify differentially expressed proteins (DEPs) between the two groups. Gene Ontology (GO) functional annotation, Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway functional enrichment, and protein-protein interaction analyses of DEPs were conducted to identify their relevant biological processes, cellular components, and related pathways. We used a parallel reaction monitoring (PRM)-based targeted quantitative proteomics approach to validate those findings. Results Of 8484 peptides identified by searching the UniProtKB/Swiss-Prot knowledgebase, 867 proteins were quantifiable, of which 20 were upregulated and 35 were downregulated in the COPD group. GO functional annotation indicated that the subcellular localization of most DEPs was extracellular. The top three molecular functions of the DEPs were signaling receptor binding, antigen binding, and immunoglobulin receptor binding. The most relevant biological process was immune response. The transforming growth factor-β signaling pathway, Staphylococcus aureus infection, and hematopoietic cell lineage were the top three pathways identified in the KEGG pathway functional enrichment. Our PRM analyses confirmed the identification of 11 DEPs identified in our data-independent acquisition analyses, 8 DEPs were upregulated and 3 DEPs were downregulated. Conclusion This study using data-independent acquisition analyses with PRM confirmation of findings identified 11 DEPs in the serum of patients with COPD. These DEPs are potential diagnostic or prognostic biomarkers or may be future targets for the treatment of COPD.
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Affiliation(s)
- Sinan Wu
- National Center for Respiratory Medicine, Beijing, People’s Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People’s Republic of China
- Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People’s Republic of China
| | - Ke Huang
- National Center for Respiratory Medicine, Beijing, People’s Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People’s Republic of China
- Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People’s Republic of China
| | - Chenli Chang
- National Center for Respiratory Medicine, Beijing, People’s Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People’s Republic of China
- Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People’s Republic of China
- China-Japan Friendship Hospital (Institute of Clinical Medical Sciences), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People’s Republic of China
| | - Xu Chu
- National Center for Respiratory Medicine, Beijing, People’s Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People’s Republic of China
- Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People’s Republic of China
- Department of Pulmonary and Critical Care Medicine The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - Kun Zhang
- Biotree-Shanghai, Focus Dream Park, Shanghai, People’s Republic of China
| | - Baicun Li
- National Center for Respiratory Medicine, Beijing, People’s Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People’s Republic of China
- Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People’s Republic of China
| | - Ting Yang
- National Center for Respiratory Medicine, Beijing, People’s Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People’s Republic of China
- Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People’s Republic of China
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Kocaoğlu M, Kocaoğlu BE, Erol Aytekin S, Keskin DM, Güner ŞN, Keleş S, Reisli İ. Clinical and laboratory evaluation of Turkish children with IgG subclass deficiency. Pediatr Neonatol 2023; 64:38-45. [PMID: 36089538 DOI: 10.1016/j.pedneo.2022.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/14/2022] [Accepted: 04/28/2022] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND IgG subclass deficiency is a laboratory diagnosis and becomes important with recurrent infections. This study aimed to examine the demographic, clinical, and laboratory results of pediatric cases with IgG subclass deficiency and to improve the understanding of the clinical significance of IgG subclass deficiency. METHODS In this study, the clinical and laboratory features of 111 pediatric patients, with at least one whose serum IgG subclasses was measured as lower than 2 standard deviation of healthy aged-matched control values, were evaluated. The clinical and laboratory features of the cases with isolated IgG subclass deficiency (Group 1) and those with low serum levels of any of IgG, IgA, and IgM in addition to the IgG subclass deficiency (Group 2) were compared. RESULTS A total of 55 (49.54%) and 56 (50.45%) patients were included in Groups 1 and 2, respectively. Among our studied cases, 20 (18.1%) had a history of hospitalization in the neonatal period, 61 (54.95%) had at least one hospitalization due to infection, and 55 (49.54%) had a history of recurrent infection. The frequencies of these three conditions were statistically significantly higher in Group 2 (p < 0.05). The frequencies of infections in the last year in Groups 1 and 2 were 4.4 ± 1.2 and 5.4 ± 1.9, respectively (p < 0.05). As a result of recurrent infections, 43.24% (n = 48) of our patients received antibiotic prophylaxis, and 21.62% (n = 24) had immunoglobulin replacement therapy. Furthermore, the numbers of patients who needed these treatments were higher in Group 2 (p < 0.05). CONCLUSION In cases with IgG subclass deficiencies, concomitant main-group immunoglobulin deficiencies may increase the number and severity of infections, leading to hospitalizations, antibiotic prophylaxis, and immunoglobulin therapy. More attention should be paid to cases of immunoglobulin main-group deficiencies in the follow-up of these cases.
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Affiliation(s)
- Mehmet Kocaoğlu
- Dr. Ali Kemal Belviranlı Obstetrics and Children's Hospital, Konya, Turkey.
| | | | - Selma Erol Aytekin
- Department of Pediatric Immunology and Allergy, Necmettin Erbakan University Meram Medical Faculty, Konya, Turkey
| | | | - Şükrü Nail Güner
- Department of Pediatric Immunology and Allergy, Necmettin Erbakan University Meram Medical Faculty, Konya, Turkey
| | - Sevgi Keleş
- Department of Pediatric Immunology and Allergy, Necmettin Erbakan University Meram Medical Faculty, Konya, Turkey
| | - İsmail Reisli
- Department of Pediatric Immunology and Allergy, Necmettin Erbakan University Meram Medical Faculty, Konya, Turkey
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3
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Is Rituximab-Associated Hypogammaglobulinemia Always Linked to B-Cell Depletion? CHILDREN 2022; 9:children9020295. [PMID: 35205015 PMCID: PMC8870122 DOI: 10.3390/children9020295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 02/15/2022] [Accepted: 02/18/2022] [Indexed: 01/19/2023]
Abstract
We describe a case of a 3-year-old male toddler with a history of severe and refractory warm antibody autoimmune hemolytic anemia (w-AIHA) since early infancy and hypogammaglobulinemia persisting 20 months after rituximab administration (second-line rescue therapy). Specifically, although peripheral blood flow cytometry B-cell population counts signified B-cell recovery following completion of rituximab therapy, IgG levels were barely detectable. Detailed laboratory evaluation did not reveal any humoral or cell-mediated immunity impairment and the patient remained asymptomatic, without any infections or recurrence of w-AIHA. Due to severe hypogammaglobulinemia, he was placed on immunoglobulin replacement therapy (IVIG). The implemented PID (primary immunodeficiency) gene panel identified only variants of uncertain significance (VUS). The aim of this report is to underline the documentation of persisting hypogammaglobulinemia after rituximab despite peripheral blood B-cell reconstitution.
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Jeong JE, Jang YY. Diagnosis and treatment of immunoglobulin G subclass deficiency in a school-age child with recurrent wheezing. ALLERGY ASTHMA & RESPIRATORY DISEASE 2022. [DOI: 10.4168/aard.2022.10.1.55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Ji Eun Jeong
- Department of Pediatrics, Daegu Catholic University Medical Center, Daegu Catholic University School of Medicine, Daegu, Korea
| | - Yoon Young Jang
- Department of Pediatrics, Daegu Catholic University Medical Center, Daegu Catholic University School of Medicine, Daegu, Korea
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Perazzio SF, Palmeira P, Moraes-Vasconcelos D, Rangel-Santos A, de Oliveira JB, Andrade LEC, Carneiro-Sampaio M. A Critical Review on the Standardization and Quality Assessment of Nonfunctional Laboratory Tests Frequently Used to Identify Inborn Errors of Immunity. Front Immunol 2021; 12:721289. [PMID: 34858394 PMCID: PMC8630704 DOI: 10.3389/fimmu.2021.721289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 10/05/2021] [Indexed: 12/24/2022] Open
Abstract
Inborn errors of immunity (IEI), which were previously termed primary immunodeficiency diseases, represent a large and growing heterogeneous group of diseases that are mostly monogenic. In addition to increased susceptibility to infections, other clinical phenotypes have recently been associated with IEI, such as autoimmune disorders, severe allergies, autoinflammatory disorders, benign lymphoproliferative diseases, and malignant manifestations. The IUIS 2019 classification comprises 430 distinct defects that, although rare individually, represent a group affecting a significant number of patients, with an overall prevalence of 1:1,200-2,000 in the general population. Early IEI diagnosis is critical for appropriate therapy and genetic counseling, however, this process is deeply dependent on accurate laboratory tests. Despite the striking importance of laboratory data for clinical immunologists, several IEI-relevant immunoassays still lack standardization, including standardized protocols, reference materials, and external quality assessment programs. Moreover, well-established reference values mostly remain to be determined, especially for early ages, when the most severe conditions manifest and diagnosis is critical for patient survival. In this article, we intend to approach the issue of standardization and quality control of the nonfunctional diagnostic tests used for IEI, focusing on those frequently utilized in clinical practice. Herein, we will focus on discussing the issues of nonfunctional immunoassays (flow cytometry, enzyme-linked immunosorbent assays, and turbidimetry/nephelometry, among others), as defined by the pure quantification of proteins or cell subsets without cell activation or cell culture-based methods.
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Affiliation(s)
- Sandro Félix Perazzio
- Division of Rheumatology, Universidade Federal de São Paulo, Sao Paulo, Brazil.,Immunology Division, Fleury Medicine and Health Laboratory, Sao Paulo, Brazil
| | - Patricia Palmeira
- Laboratório de Investigação Médica (LIM-36), Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), Sao Paulo, Brazil
| | - Dewton Moraes-Vasconcelos
- Laboratório de Investigação Médica (LIM-56), Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), Sao Paulo, Brazil
| | - Andréia Rangel-Santos
- Laboratório de Investigação Médica (LIM-36), Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), Sao Paulo, Brazil
| | | | - Luis Eduardo Coelho Andrade
- Division of Rheumatology, Universidade Federal de São Paulo, Sao Paulo, Brazil.,Immunology Division, Fleury Medicine and Health Laboratory, Sao Paulo, Brazil
| | - Magda Carneiro-Sampaio
- Laboratório de Investigação Médica (LIM-36), Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), Sao Paulo, Brazil.,Department of Pediatrics, Faculdade de Medicina da Universidade de São Paulo (FMUSP), Sao Paulo, Brazil
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Zhang X, Wang J, Zhu K, Jin Y, Fu H, Mao J. Activated phosphoinositide 3-kinase delta syndrome misdiagnosed as anti-neutrophil cytoplasmic antibody-associated vasculitis: a case report. J Int Med Res 2021; 49:3000605211013222. [PMID: 34039074 PMCID: PMC8755648 DOI: 10.1177/03000605211013222] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Activated phosphoinositide 3-kinase delta syndrome (APDS) is a combined inborn error of immunity mainly caused by PIK3CD mutations. We herein describe a 4-year-old Chinese boy who was admitted for recurrent pneumonia and persistent hematuria and exhibited multisystem involvement and anti-neutrophil cytoplasmic antibody (ANCA) positivity. He was initially diagnosed with ANCA-associated vasculitis. However, genetic testing revealed a c.1574A>G PIK3CD mutation, resulting in a diagnosis of APDS1.
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Affiliation(s)
- Xiaojing Zhang
- Department of Nephrology, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Jingjing Wang
- Department of Nephrology, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Kun Zhu
- Department of Pathology, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Yanyan Jin
- Department of Nephrology, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Haidong Fu
- Department of Nephrology, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Jianhua Mao
- Department of Nephrology, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
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Immunoglobulin G Deficiency in Children with Recurrent Respiratory Infections with and Without History of Allergy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021. [PMID: 32519307 DOI: 10.1007/5584_2020_541] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
Recurrent respiratory tract infections (RTI) are one of the most common diseases in childhood. Frequent infections adversely affect the development of a child and may lead to suspicion of immunodeficiency. An additional allergy component is thought conducive to infection occurrence. In this study, we retrospectively assessed medical records of 524 children hospitalized with RTI. Patients were divided into two groups: RTI-alone (n = 394) and RTI with a history of allergy (n = 130). Overall, we found that a great majority of children with RTI had the immunoglobulin G within the normal limit, irrespective of allergy. A variable IgG deficiency, most often affecting IgG1, IgG3, and IgG4 subclass, was present in less than one-third of children. Proportions of specific IgG subclass deficiency, varying from about 10% to 40%, were similar in both RTI-alone and RTI-allergy groups. The only significant effect was a modestly smaller proportion of children with IgG4 deficiency in the RTI-allergy group when compared with the RTI-alone group. We also found that IgG deficiencies were age-dependent as their number significantly increased with children's age, irrespective of allergy. The results demonstrate a lack of distinct abnormalities in the immunoglobulin G profile which would be characteristic to a clinical history of allergy accompanying recurrent RTI in children. Thus, we conclude that the assessment of IgGs could hardly be of help in the differential diagnostics of the allergic background of RTI.
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Grunewald O, Lopez B, Brabant S, Rogeau S, Deschildre A, Phrommavanh V, Lefort M, Moitrot E, Gyselinckx D, Deleplancque AS, Lefevre G, Labalette M, Dubucquoi S. Immunoglobulin G (IgG) and IgG subclass reference intervals in children, using Optilite® reagents. ACTA ACUST UNITED AC 2018; 56:1319-1327. [DOI: 10.1515/cclm-2018-0001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 02/15/2018] [Indexed: 11/15/2022]
Abstract
Abstract
Background:
Immunoglobulin G (IgG) and IgG subclass assays are indicated in patients with suspected primary immunodeficiency (PID). Commercially available assays for IgG subclass determination are calibrated against various preparations, and so specific reference values are required for each of them. Using Optilite® reagents from The Binding Site Group Ltd., we sought to determine the pediatric IgG and IgG subclass reference intervals with respect to the ERM-DA470k certified reference material.
Methods:
Levels of IgG and IgG subclasses were analyzed in serum samples collected from a large cohort of PID-free children and adolescents. Reference intervals were calculated for previously published age groups (6–12 months, 12–18 months, 18 months–2 years, 2–3 years, 3–4 years, 4–6 years, 6–9 years, 9–12 years and 12–18 years), according to the Clinical and Laboratory Standards Institute’s C28-A3c protocol.
Results:
A total of 456 serum samples were analyzed. The correlation between the total IgG and the sum of the IgG subclasses was good (r2=0.96). No statistically significant gender-specific differences were observed. Our results for the changes over time in IgG and IgG subclass levels are consistent with previous reports. The differences between our lower/upper reference limits and those in the literature are probably due to variations in calibration.
Conclusions:
Our present results provide a reliable basis for the diagnosis of PIDs in childhood and for the accreditation of laboratories using Optilite® immunoturbidimetric reagents for IgG subclass measurement. Laboratory scientists and clinicians should be aware of the need for manufacturer-specific IgG subclass reference intervals.
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A reference interval for serum IgG subclasses in Chinese children. PLoS One 2018; 13:e0192923. [PMID: 29505563 PMCID: PMC5837086 DOI: 10.1371/journal.pone.0192923] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 01/12/2018] [Indexed: 11/19/2022] Open
Abstract
Background Reference intervals (RIs) for serum IgG subclasses vary greatly among different geographical regions. The present study aimed to establish RIs for serum IgG subclasses in Chinese children, which is essential for interpretation of laboratory findings and making clinical decisions. Methods This study was performed in accordance with guideline C28-A3, proposed by the International Federation of Clinical Chemistry and the Clinical and Laboratory Standards Institute. In total, 607 apparently healthy Chinese children were enrolled, and serum levels of IgG subclasses were measured. Individuals were stratified by age and the RIs were determined through statistical analysis. Results Following were the median values of RIs for serum IgG subclasses in Chinese children: IgG1, 2.78 g/L; IgG2, 0.85 g/L; IgG3, 0.13 g/L; IgG4, 0.06 g/L at 1–6 months of age; IgG1, 3.64 g/L; IgG2, 0.73 g/L; IgG3, 0.19 g/L; IgG4, 0.03 g/L at 6–12 months of age; IgG1, 5.15 g/L; IgG2, 0.87 g/L; IgG3, 0.19 g/L; IgG4, 0.07 g/L at 1–2 years of age; IgG1, 5.26 g/L; IgG2, 1.23 g/L; IgG3, 0.14 g/L; IgG4, 0.11 g/L at 2–3 years of age; IgG1, 6.33 g/L; IgG2, 1.8 g/L; IgG3, 0.2 g/L; IgG4, 0.21 g/L at age 3–4 years; IgG1, 7.05 g/L; IgG2, 1.87 g/L; IgG3, 0.25 g/L; IgG4, 0.29 g/L at 4–6 years of age; IgG1, 6.19 g/L; IgG2, 1.93 g/L; IgG3, 0.2 g/L; IgG4, 0.28 g/L at 6–9 years of age; IgG1, 6.76 g/L; IgG2, 2.29 g/L; IgG3, 0.27 g/L; IgG4, 0.37 g/L at 10–12 years of age; IgG1, 7.45 g/L; IgG2, 2.92 g/L; IgG3, 0.28 g/L; IgG4, 0.38 g/L at 13–16 years of age. Conclusion To our knowledge, this study is the first to establish RIs for serum IgG subclasses exclusively in Chinese children.
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