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Suzuki A, Hirokawa M, Kanematsu R, Tanaka A, Yamao N, Higuchi M, Hayashi T, Kuma S, Miyauchi A. B-cell to T-cell ratio as a novel indicator in flow cytometry in the diagnosis of thyroid lymphoma. Endocr J 2022; 69:291-297. [PMID: 34670907 DOI: 10.1507/endocrj.ej21-0451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Preoperative flow cytometry is recommended to prove the monoclonality and confirm the diagnosis of thyroid lymphoma. However, lymphoma cases without light chain restriction may also have monoclonality. The aim of our study was to identify a novel marker for thyroid lymphomas using aspirated materials for flow cytometry. We retrospectively analyzed 26 patients with primary thyroid lymphomas and 16 patients with benign lymphoproliferative lesions. The materials for flow cytometry were obtained by fine-needle aspiration cytology using a 22-gauge needle under ultrasound guidance. Light chain restriction was defined as a κ to λ ratio of less than 0.5 or more than 3.0. According to the light chain-positive rate, 25% or less and more than 25% were classified as the low and high light chain-positive rate groups, respectively. B-cell predominance was defined as a CD19 to CD4 ratio (B- to T-cell ratio) of more than 2.0. B-cell predominance was more frequently observed in lymphomas (88.5%) than in benign lymphoproliferative lesions (25.0%; p < 0.001). Light chain restriction based on the κ/λ ratio was detected in 69.2% of lymphomas, but not in benign lymphoproliferative lesions. Among lymphomas belonging to the low light chain-positive rate group, 88.9% did not exhibit light chain restriction and B-cell predominance was present. In contrast, benign lymphoproliferative lesions with B-cell predominance were not detected in the low light chain-positive rate group. B-cell predominance was a useful indicator for diagnosing thyroid lymphoma in the low light chain-positive rate group without light chain restriction.
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Affiliation(s)
- Ayana Suzuki
- Department of Diagnostic Pathology and Cytology, Kuma Hospital, Hyogo 650-0011, Japan
| | - Mitsuyoshi Hirokawa
- Department of Diagnostic Pathology and Cytology, Kuma Hospital, Hyogo 650-0011, Japan
| | - Risa Kanematsu
- Department of Diagnostic Pathology and Cytology, Kuma Hospital, Hyogo 650-0011, Japan
| | - Aki Tanaka
- Department of Diagnostic Pathology and Cytology, Kuma Hospital, Hyogo 650-0011, Japan
| | - Naoki Yamao
- Department of Diagnostic Pathology and Cytology, Kuma Hospital, Hyogo 650-0011, Japan
| | - Miyoko Higuchi
- Department of Diagnostic Pathology and Cytology, Kuma Hospital, Hyogo 650-0011, Japan
| | - Toshitetsu Hayashi
- Department of Diagnostic Pathology and Cytology, Kuma Hospital, Hyogo 650-0011, Japan
| | - Seiji Kuma
- Department of Diagnostic Pathology and Cytology, Kuma Hospital, Hyogo 650-0011, Japan
| | - Akira Miyauchi
- Department of Surgery, Kuma Hospital, Hyogo 650-0011, Japan
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2
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Teniente-Serra A, Soldevila B, Quirant-Sánchez B, Fernández MA, Ester Condins A, Puig-Domingo M, Pujol-Borrell R, Martínez-Cáceres EM. Distinct pattern of peripheral lymphocyte subsets in Graves' disease with persistency of anti-TSHR autoantibodies. Autoimmunity 2019; 52:220-227. [PMID: 31366254 DOI: 10.1080/08916934.2019.1646253] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Background: Graves' disease (GD) is characterized by the production of autoantibodies against the TSHR (TRAbs). With long-term treatment, serum concentrations of TRAbs decline but in some patients, despite being clinically stable, TRAbs persist for many years.Objective: To investigate whether GD patients with persistence of TRAbs constitute a subset of patients that could be identified by phenotypic analysis of circulating lymphocytes, suggesting disease heterogeneity.Materials and methods: Peripheral blood lymphocytes (including naïve, memory and effector T and B cells, Th17, regulatory T cells (Treg), recent thymic emigrants (RTEs) and double positive CD4+CD8+ (DP) cells) were analysed by flow cytometry in a cross-sectional study in 25 clinically stable GD patients, five patients at onset of GD disease and 40 healthy donors (HDs).Results: GD patients with persistence of TRAbs showed a lower percentage of Treg and lower absolute numbers of central and effector memory CD8+ T cells than HD. No differences in RTEs were found in peripheral blood from GD patients compared to HD. Stable GD patients had higher percentage of DP cells of effector phenotype than HD.Conclusions: Using extensive phenotypic analysis of lymphocyte subpopulations, it is possible to detect changes that help to identify patients with persistent TSHR antibodies and may contribute to understand why the autoimmune response is maintained.
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Affiliation(s)
- Aina Teniente-Serra
- Immunology Division, LCMN Germans Trias i Pujol University Hospital Badalona, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Barcelona, Spain.,Institut d'Investigació en Ciències de la Salut Germans Trias i Pujol, Barcelona, Spain
| | - Berta Soldevila
- Endocrinology and Nutrition Department, Hospital Universitari Germans Trias i Pujol, Barcelona, Spain
| | - Bibiana Quirant-Sánchez
- Immunology Division, LCMN Germans Trias i Pujol University Hospital Badalona, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Barcelona, Spain.,Institut d'Investigació en Ciències de la Salut Germans Trias i Pujol, Barcelona, Spain
| | - Marco A Fernández
- Flow Cytometry Facility, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
| | | | - Manuel Puig-Domingo
- Institut d'Investigació en Ciències de la Salut Germans Trias i Pujol, Barcelona, Spain.,Endocrinology and Nutrition Department, Hospital Universitari Germans Trias i Pujol, Barcelona, Spain
| | - Ricardo Pujol-Borrell
- Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Barcelona, Spain.,Immunology Division, Hospital Universitari Vall d'Hebron, Vall d'Hebron Institut de Recerca, Barcelona, Spain
| | - Eva M Martínez-Cáceres
- Immunology Division, LCMN Germans Trias i Pujol University Hospital Badalona, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Barcelona, Spain.,Institut d'Investigació en Ciències de la Salut Germans Trias i Pujol, Barcelona, Spain
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3
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Stacchini A, Demurtas A, Aliberti S. Extranodal Lymphoproliferative Processes and Flow Cytometry. Acta Cytol 2016; 60:315-325. [PMID: 27537785 DOI: 10.1159/000448021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 06/28/2016] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Fine-needle aspiration (FNA) cytology is a safe and cost-effective technique for the diagnosis of lymphoproliferative processes, especially when correlated with clinical and imaging studies. However, cytology alone may be unable to detect a lymphoid neoplastic process, as architectural features are less obvious than in histologic preparations and, in certain cases, reactive processes may mimic lymphoma. Flow cytometry (FC) has been recognized as an important ancillary technique in the diagnosis of lymphoid neoplasms and it can be used in conjunction with FNA in the evaluation of lymphoproliferative processes. STUDY DESIGN We performed a review of the published literature concerning FC applied to the detection of salivary glands and thyroid lymphoproliferative processes, which are frequently related to autoimmune diseases and difficult to diagnose by cytomorphology alone. RESULTS FC is able to detect and subtype non-Hodgkin lymphomas and may contribute to the exclusion of a neoplastic process in cytologically unclear cases. CONCLUSIONS FC can be successfully applied in the differential diagnosis of lymphoproliferative processes in the head and neck region. The FNA-FC combined approach can reduce time to therapy and may prevent unnecessary surgical biopsies.
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Affiliation(s)
- Alessandra Stacchini
- Flow Cytometry Unit, Anatomic Pathology, Diagnostic Laboratory Department, Città della Salute e della Scienza, Turin, Italy
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4
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Stacchini A, Pacchioni D, Demurtas A, Aliberti S, Cassenti A, Isolato G, Gazzera C, Veltri A, Sapino A, Papotti M, Freddi M, Palestini N, Sisto G, Novero D. Utilility of flow cytometry as ancillary study to improve the cytologic diagnosis of thyroid lymphomas. CYTOMETRY PART B-CLINICAL CYTOMETRY 2014; 88:320-9. [DOI: 10.1002/cyto.b.21204] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 10/10/2014] [Accepted: 11/06/2014] [Indexed: 12/30/2022]
Affiliation(s)
- Alessandra Stacchini
- Diagnostic Laboratory Department; Flow Cytometry Unit, Citta' della Salute e della Scienza; Turin Italy
| | - Donatella Pacchioni
- Diagnostic Laboratory Department; Pathology Service, Citta' della Salute e della Scienza; Turin Italy
| | - Anna Demurtas
- Diagnostic Laboratory Department; Flow Cytometry Unit, Citta' della Salute e della Scienza; Turin Italy
| | - Sabrina Aliberti
- Diagnostic Laboratory Department; Flow Cytometry Unit, Citta' della Salute e della Scienza; Turin Italy
| | - Adele Cassenti
- Diagnostic Laboratory Department; Pathology Service, Citta' della Salute e della Scienza; Turin Italy
| | - Giuseppe Isolato
- Diagnostic Imaging Department; Citta' della Salute e della Scienza; Turin Italy
| | - Carlo Gazzera
- Diagnostic Imaging Department; Citta' della Salute e della Scienza; Turin Italy
| | - Andrea Veltri
- Department of Clinical and Biomedical Sciences; University of Turin at San Luigi Hospital; Orbassano Turin Italy
| | - Anna Sapino
- Diagnostic Laboratory Department; Pathology Service, Citta' della Salute e della Scienza; Turin Italy
| | - Mauro Papotti
- Department of Clinical and Biomedical Sciences; University of Turin at San Luigi Hospital; Orbassano Turin Italy
| | - Milena Freddi
- Surgery Department; Citta' della Salute e della Scienza; Turin Italy
| | - Nicola Palestini
- Surgery Department; Citta' della Salute e della Scienza; Turin Italy
| | - Gabriella Sisto
- Surgery Department; Citta' della Salute e della Scienza; Turin Italy
| | - Domenico Novero
- Diagnostic Laboratory Department; Pathology Service, Citta' della Salute e della Scienza; Turin Italy
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5
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Bossowski A, Stasiak-Barmuta A, Urban M. Relationship between CTLA-4 and CD28 molecule expression on T lymphocytes and stimulating and blocking autoantibodies to the TSH-receptor in children with Graves' disease. HORMONE RESEARCH 2005; 64:189-97. [PMID: 16220002 DOI: 10.1159/000088875] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2005] [Accepted: 09/02/2005] [Indexed: 01/06/2023]
Abstract
The present study was performed to elucidate the relationship between CTLA-4/CD28 molecules and stimulating (TSAb) and blocking (TBAb) antibodies to the TSH-receptor (TSH-R) in Graves' disease. CD28 and CD152 (CTLA-4) are glycoprotein molecules which provide a potent costimulatory signal for T-cell activation and proliferation via interactions with their ligands, B7.1/B7.2 molecules, which are present on the surface of antigen-presenting cells. The aim of the study was to estimate the expression of cytotoxic T-lymphocyte-associated antigen-4 (CTLA-4, CD152), CD28, B7.1 (CD80), and B7.2 (CD86) molecules on peripheral blood cells in patients with Graves' disease (GD) (n = 55, mean age 15.5 +/- 5.1 years) and nontoxic nodular goiter (NTNG) (n = 55, mean age 15.2 +/- 4.5 years), in comparison with sex and age-matched healthy control subjects (n = 55, mean age 15.2 +/- 3.9 years). The expression of the costimulatory molecules on mononuclear cells was analyzed by three-color flow cytometry using a Coulter EPICS XL cytometer. Detection of TSAb and TBAb to the TSH-R using JPO9 CHO cells in unfractionated serum was measured by a highly sensitive commercial radioimmunoassay. When compared with healthy control subjects and euthyroid patients with GD, untreated patients with GD showed a significant increase of CD152+ (p < 0.001, p < 0.001) and CD28+ (p < 0.01, NS) T lymphocytes, respectively. After 6-12 months of methimazole therapy, the percentage of these cells in the peripheral blood of hyperthyroid patients returned to normal values. In addition, patients with GD showed an increase in the percentage of both B7.1 (3.8%) and B7.2 (18.4%) molecules on activated monocytes, compared to patients with NTNG (0.5% p < 0.05, 2.5% p < 0.01, respectively) and healthy control subjects (0.2% p < 0.05, 0.8% p < 0.003, respectively). In patients with untreated GD there was a statistically significant positive correlation between the expression of CTLA-4 on the surface of peripheral blood T cells and the index of TSAb antibodies (R = 0.54, p < 0.001) as well as a negative correlation with TBAb antibody titer (R = -0.58, p < 0.001). However, no such correlations were noted with regard to CD28 and anti-TPO, anti-TG, and TRAb antibodies. We conclude that changes in the expression of costimulatory molecules on the surface of peripheral blood T cells and their significant relationship with the level of antithyroid antibodies indicate an involvement of these molecules in the pathogenesis of GD.
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Affiliation(s)
- Artur Bossowski
- 2nd Department of Children's Diseases, Medical University of Białystok, Białystok, Poland.
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6
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Aksoy DY, Kerimoglu U, Okur H, Canpinar H, Karaağaoğlu E, Yetgin S, Kansu E, Gedik O. Effects of prophylactic thyroid hormone replacement in euthyroid Hashimoto's thyroiditis. Endocr J 2005; 52:337-43. [PMID: 16006728 DOI: 10.1507/endocrj.52.337] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Hashimoto's thyroiditis is the most frequent autoimmune thyroid disease. L-thyroxine therapy can reduce the incidence and alleviate the symptoms of this disease. The aim of this study was to evaluate the effects of prophylactic L-thyroxine treatment on clinical and laboratory findings of patients who were euthyroid at the time of diagnosis. Thirty-three patients who had diagnosis of euthyroid Hashimoto's thyroiditis were randomized to two groups, one group received prophylactic L-thyroxine treatment and the other was followed-up without treatment. Initial thyroid function tests, autoantibodies, ultrasonography, fine needle aspiration biopsy and peripheral blood lymphocyte subsets were similar in the two study groups. After 15 months of L-thyroxine treatment, there was a significant increase in free T4 and a significant decrease in TSH and anti-thyroglobulin antibody anti-thyroid peroxidase antibody levels. CD8+ cell counts increased in both groups, CD4/CD8 levels decreased significantly because of the increase in CD8+ cell count levels. Though there was no change in cytological findings, ultrasonography showed a decrease in thyroid volume in L-thyroxine receiving patients whereas an increase was detected in patients who were followed without treatment. In conclusion, prophylactic thyroid hormone therapy can be used in patients with Hashimoto's thyroiditis even if they are euthyroid.
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Affiliation(s)
- Duygu Yazgan Aksoy
- Section of Endocrinology and Metabolism, Department of Internal Medicine, Hacettepe University, Ankara, Turkey
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7
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Bossowski A, Urban M, Stasiak-Barmuta A. Analysis of changes in the percentage of B (CD19) and T (CD3) lymphocytes, subsets CD4, CD8 and their memory (CD45RO), and naive (CD45RA) T cells in children with immune and non-immune thyroid diseases. J Pediatr Endocrinol Metab 2003; 16:63-70. [PMID: 12585342 DOI: 10.1515/jpem.2003.16.1.63] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Graves' disease (GD) is an autoimmune thyroid disease caused by immunological abnormality. The immune cells (lymphocytes T and B) which infiltrate the thyroid gland play a key role in the development of autoimmune thyroid disease (AITD). The aim of this study was to evaluate the differences between distribution of T (CD3) lymphocytes, subsets CD4, CD8, and their memory (CD45RO), and naive (CD45RA) T cells and B (CD19) lymphocytes in the peripheral blood of patients with Graves' disease (GD) (n = 33, mean age 15.9 +/- 5.9 years) and non-toxic nodular goiter (NTNG) (n = 25, mean age 15.2 years), in comparison to age- and sexmatched healthy control subjects (n = 25, mean age 15.9 years). The percentages of peripheral blood lymphocyte subsets were analyzed by three-color flow cytometry using a Coulter EPICS XL cytometer. In the untreated Graves' patients we observed an increase in the percentage of CD19+ (p<0.007, p<0.003), CD4+ (p<0.004, p<0.017), CD4+CD45RO+ (p<0.04, NS), CD4/CD8 ratio (p<0.002, p<0.001) and a decrease in the percentage of CD8+ (p<0.02, p<0.02), CD4+CD45RA+ (p<0.04, p<0.03) cells in comparison to the healthy control subjects and euthyroid Graves' patients. These abnormalities were absent in children with non-toxic nodular goiter. In addition, the levels of CD3+, CD4+CD8+, CD8+CD45RO+ T cells and CD8 lymphocytes co-expressing CD45RA and CD45RO antigens were similar in all groups and no statistically significant differences were found in comparison to the healthy controls. In the untreated Graves' patients we found a positive correlation between serum levels of fT4 and fT3 and the percentage of CD19+ lymphocytes (r = 0.45, p<0.01, r = 0.37, p<0.04), between serum level of fT4 and the percentage of CD4CD45RO (r = 0.4, p<0.02) lymphocytes and between concentration of TRAb and CD4+ (r = 0.38, p <0.04) and CD19+ (r = 0.39, p<0.016) cells. Statistically significant negative correlations existed between TRAb, TPO-Ab or TG-Ab concentration in blood serum and the percentage of CD8+ lymphocytes (r = -0.55, p<0.002; r = -0.41, p<0.02; r = -0.51, p<0.004), and between fT4 concentration and the percentage of CD8+ (r = -0.39, p<0.02) lymphocytes. No such correlation was detected in patients with non-toxic nodular goiter. We conclude that the abnormal distribution of B lymphocytes, memory and naive T cell subsets in the peripheral blood in children and adolescents with untreated Graves' disease suggests their role in the development of autoimmunity. The normalization in the percentage of these immune cells after thyrostatic treatment in comparison to newly diagnosed patients confirms the immunomodulatory effect of methimazole therapy.
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Affiliation(s)
- Artur Bossowski
- 2nd Department of Children's Diseases, Medical Academy of Białystok, Poland.
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8
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Padberg S, Heller K, Usadel KH, Schumm-Draeger PM. One-year prophylactic treatment of euthyroid Hashimoto's thyroiditis patients with levothyroxine: is there a benefit? Thyroid 2001; 11:249-55. [PMID: 11327616 DOI: 10.1089/105072501750159651] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Studies in animal models of spontaneous Hashimoto's autoimmune thyroiditis (HT) show that prophylactic treatment with levothyroxine (LT4) can reduce incidence and degree of lymphocytic infiltration in HT. The aim of the present study was to clarify whether there is a benefit of prophylactic treatment with LT4 in patients with euthyroid HT with respect to the progression of the autoimmune process. Twenty-one patients with euthyroid HT were checked for thyroid function (thyrotropin [TSH], free triiodothyronine [FT3], free thyroxine [FT4]), thyroid volume, antibodies (thyroglobulin [Tg-Ab], thyroid peroxidase [TPO-Ab]), and lymphocyte subsets. Peripheral (PBL) and thyroid-derived lymphocytes (TL) were analyzed by triple color flow cytometry. One-half of the patients with euthyroid HT were treated with LT4 for 1 year (n = 10). The other half (n = 11) were never treated with LT4. TL were obtained by fine-needle aspiration biopsy (FNAB). Thirteen healthy subjects (C) without medical history of thyroid disease served as controls concerning PBL, and patients with non-toxic nodular goiter (NG; n = 10) served as controls concerning TL. Thyroid-derived T-helper cells were found more frequently in euthyroid patients with HT compared to patients with NG (p < 0.01). After 1 year of therapy with LT4, TPO-Abs and B lymphocytes decreased significantly only in the treated group of euthyroid patients with HT (p < 0.05). In contrast, TPO-Abs levels did not change or even increased in untreated euthyroid patients with HT. Thyroid volume did not differ before and after therapy. Prophylactic treatment of euthyroid patients with HT reduced both serological and cellular markers of autoimmune thyroiditis. Therefore, prophylactic LT4 treatment might be useful to stop the progression or even manifestation of the disease. However, the long-term clinical benefit of prophylactic LT4 therapy in euthyroid patients with HT is yet to be established.
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Affiliation(s)
- S Padberg
- Medica Clinic l, Endocrinology, Center of Internal Medicine, Johann Wolfgang Goethe-University, Frankfurt/Main, Germany
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9
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Cignarelli M, Triggiani V, Ciampolillo A, Ambrosi A, Giorgino F, Liso V, Giorgino R. High frequency of incidental diagnosis of extrathyroidal neoplastic diseases at the fine-needle aspiration biopsy of laterocervical lymph nodes in patients with thyroid nodules. Thyroid 2001; 11:65-71. [PMID: 11272099 DOI: 10.1089/10507250150500685] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study was undertaken to evaluate the frequency of the incidental diagnosis of extrathyroidal lymph node diseases at ultrasound-guided fine-needle aspiration biopsy/cytology (FNAB/C) being done to check the presence of metastatic thyroid cancer in 30 subjects with thyroid nodule (TN) and enlarged cervical lymph nodes (CLN). The patients in whom cytology suggested the presence of malignancy in the TN or in the CLN underwent surgical removal for histologic diagnosis. The spectrum of diseases revealed by this survey included: (1) 10 benign diseases including 1 case of Piringer-Kuchinka lymphadenitis with benign TN; (2) 10 metastatic thyroid cancers (2 anaplastic and 8 papillary cancers); (3) 3 benign TN associated with metastatic invasion of cervical lymph nodes from lung (2 cases) and breast (1 case) cancer; (4) 1 Hodgkin's lymphoma of the cervical lymph nodes with hyperplastic TN; (5) 3 nodal lymphomas with benign thyroid nodule and 2 cases of thyroid lymphoma with nodal invasion; and (6) 1 nodal sarcoidosis with benign TN. The results of this study demonstrate that important neoplastic and hematologic diseases affecting the cervical lymph nodes may frequently be incidentally detected using ultrasonography (US) and FNAB/C in the diagnostic procedure for thyroid nodule.
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Affiliation(s)
- M Cignarelli
- Cattedra di Endocrinologia e Malattie Metaboliche, Università degli Studi di Foggia, Italy.
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10
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Chapal N, Peraldi-Roux S, Bresson D, Pugniere M, Mani JC, Granier C, Baldet L, Guerrier B, Pau B, Bouanani M. Human anti-thyroid peroxidase single-chain fragment variable of Ig isolated from a combinatorial library assembled in-cell: insights into the in vivo situation. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2000; 164:4162-9. [PMID: 10754281 DOI: 10.4049/jimmunol.164.8.4162] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In an attempt to explore the natural variable heavy and light chain (VH/VL) pairing of autoantibodies involved in Graves' disease, we constructed a phage-displayed Ab library obtained by in-cell PCR of thyroid-infiltrating cells. We report here the molecular cloning and characterization of human single-chain fragment variable regions (scFv) specific for thyroid peroxidase (TPO) generated from this library. On the basis of the nucleotide sequences, three different scFvs were obtained (ICA1, ICB7, and ICA5). All were encoded by genes derived from the VH1 and Vlambda1 gene families. Using BIACORE for epitope mapping and kinetic analysis, we showed that these scFvs exhibited high affinity (Kd = 1 nM) for TPO and recognized three different epitopes. The biological relevance of these scFvs as compared with serum anti-TPO autoantibodies was assessed by competition studies. Sera from all the 29 Graves' disease patients tested were able to strongly inhibit (60-100%) the binding of the 3 scFvs to TPO. These data demonstrate that the in-cell PCR library generated human anti-TPO scFvs that retained the VH/VL pairing found in vivo and that the different epitope specificities defined by these scFvs overlapped with those found in the sera of patients with autoimmune thyroid disease.
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Affiliation(s)
- N Chapal
- Faculté de Pharmacie, Unité Mixte de Recherche 9921, Institut de Biotechnologie en Immunoanalyse et Pharmacologie, Montpellier, France
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