Points essentiels
Une lymphopénie est définie par un nombre de lymphocytes circulants < 1 500/mm3 chez l’adulte et 4 500/mm3 chez l’enfant avant 8 mois.
Nous proposons de classer les lymphopénies en fonction de leur mécanisme supposé
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les insuffisances de production, qui regroupent les déficits immunitaires primitifs ou secondaires à une dénutrition et/ou une carence en zinc
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les excès de catabolisme comprenant la radiothérapie, la chimiothérapie, les traitements immunosuppresseurs, l’infection VIH et le lupus érythémateux systémique
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les modifications de la répartition des lymphocytes, qui comprennent principalement l’hypersplénisme, certaines infections virales, le choc septique, les brûlures étendues, les granulomatoses et la corticothérapie
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les autres causes de lymphopénie, dont le mécanisme est encore mal compris : ethnie (Éthiopiens), insuffisance rénale, lymphome, tumeur solide, lymphopénie CD4 idiopathique.
Key points
Lymphopenia is defined as a peripheral lymphocyte count lower than 1500/mm3 in adults and 4500/mm3 in children younger than eight months of age.
We propose a classification of lymphopenia according to the mechanism involved
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lymphocyte production defects, including primary immune deficiencies and immune deficiencies secondary to malnutrition or zinc deprivation
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excess catabolism, due to causes including radiotherapy, chemotherapy, immunosuppressive therapy, HIV infection, and systemic lupus erythematosus
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abnormal lymphocyte trapping, including mainly splenomegaly, certain viral infections, septic shock, extended burns, systemic granulomatosis, and corticosteroids
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other causes of lymphocytopenia, with mechanisms that remain poorly understood: ethnicity (Ethiopians), lymphoma, renal insufficiency, and idiopathic CD4 lymphocytopenia.
Références
- 1.Buckley R.H. Primary immunodeficiency diseases due to defects in lymphocytes. N Engl J Med. 2000;343:1313–1324. doi: 10.1056/NEJM200011023431806. [DOI] [PubMed] [Google Scholar]
- 2.Notarangelo L.D., Mazza C., Forino C., Mazzolari E., Buzi F. AIRE and immunological tolerance: insights from the study of autoimmune polyendocrinopathy candidiasis and ectodermal dystrophy. Curr Opin Allergy Clin Immunol. 2004;4:491–496. doi: 10.1097/00130832-200412000-00004. [DOI] [PubMed] [Google Scholar]
- 3.Chandra R.K. Immunocompetence in undernutrition. J Pediatr. 1972;81:1194–1200. doi: 10.1016/s0022-3476(72)80262-2. [DOI] [PubMed] [Google Scholar]
- 4.Buckley R.H., Schiff R.I., Schiff S.E., Markert M.L., Williams L.W., Harville T.O. Human severe combined immunodeficiency: genetic, phenotypic, and functional diversity in one hundred eight infants. J Pediatr. 1997;130:378–387. doi: 10.1016/s0022-3476(97)70199-9. [DOI] [PubMed] [Google Scholar]
- 5.Puel A., Ziegler S.F., Buckley R.H., Leonard W.J. Defective IL7R expression in T(-)B(+)NK(+) severe combined immunodeficiency. Nat Genet. 1998;20:394–397. doi: 10.1038/3877. [DOI] [PubMed] [Google Scholar]
- 6.Oettinger M.A. Activation of V(D)J recombination by RAG1 and RAG2. Trends Genet. 1992;8:413–416. doi: 10.1016/0168-9525(92)90323-v. [DOI] [PubMed] [Google Scholar]
- 7.Nicolas N., Moshous D., Cavazzana-Calvo M., Papadopoulo D., de Chasseval R., Le Deist F. A human severe combined immunodeficiency (SCID) condition with increased sensitivity to ionizing radiations and impaired V(D)J rearrangements defines a new DNA recombination/ repair deficiency. J Exp Med. 1998;188:627–634. doi: 10.1084/jem.188.4.627. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 8.Parkman R., Gelfand E.W., Rosen F.S., Sanderson A., Hirschhorn R. Severe combined immunodeficiency and adenosine deaminase deficiency. N Engl J Med. 1975;292:714–719. doi: 10.1056/NEJM197504032921402. [DOI] [PubMed] [Google Scholar]
- 9.Group. WHOS. Primary Immunodeficiency diseases. Clin Exp Immunol. (1997); 109 1-28. [PubMed]
- 10.Leonard W.J., Noguchi M., Russell S.M., Mc Bride O.W. The molecular basis of X-linked severe combined immunodeficiency: the role of the interleukin-2 receptor gamma chain as a common gamma chain, gamma c. Immunol Rev. 1994;138:61–86. doi: 10.1111/j.1600-065x.1994.tb00847.x. [DOI] [PubMed] [Google Scholar]
- 11.Candotti F., Oakes S.A., Johnston J.A., Giliani S., Schumacher R.F., Mella P. Structural and functional basis for JAK3-deficient severe combined immunodeficiency. Blood. 1997;90:3996–4003. [PubMed] [Google Scholar]
- 12.Stephan V., Wahn V., Le Deist F., Dirksen U., Broker B., Muller-Fleckenstein I. Atypical X-linked severe combined immunodeficiency due to possible spontaneous reversion of the genetic defect in T cells. N Engl J Med. 1996;335:1563–1567. doi: 10.1056/NEJM199611213352104. [DOI] [PubMed] [Google Scholar]
- 13.Markert M.L. Purine nucleoside phosphorylase deficiency. Immunodefic Rev. 1991;3:45–81. [PubMed] [Google Scholar]
- 14.la Salle H., Hanau D., Fricker D., Urlacher A., Kelly A., Salamero J. Homozygous human TAP peptide transporter mutation in HLA class I deficiency. Science. 1994;265:237–241. doi: 10.1126/science.7517574. [DOI] [PubMed] [Google Scholar]
- 15.Molina I.J., Sancho J., Terhorst C., Rosen F.S., Remold-O’Donnell E.T. cells of patients with the Wiskott-Aldrich syndrome have a restricted defect in proliferative responses. J Immunol. 1993;151:4383–4390. [PubMed] [Google Scholar]
- 16.Levenson S.M., Gruber C.A., Rettura G., Gruber D.K., Demetriou A.A., Seifter E. Supplemental vitamin A prevents the acute radiation-induced defect in wound healing. Ann Surg. 1984;200:494–512. doi: 10.1097/00000658-198410000-00011. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 17.Fraker P.J., Jardieu P., Cook J. Zinc deficiency and immune function. Arch Dermatol. 1987;123:1699–1701. [PubMed] [Google Scholar]
- 18.Choi C.W., Sung H.J., Park K.H., Yoon S.Y., Kim S.J., Oh S.C. Early lymphopenia as a risk factor for chemotherapy-induced febrile neutropenia. Am J Hematol. 2003;73:263–266. doi: 10.1002/ajh.10363. [DOI] [PubMed] [Google Scholar]
- 19.Levy J.A. Infection by human immunodeficiency virus--CD4 is not enough. N Engl J Med. 1996;335:1528–1530. doi: 10.1056/NEJM199611143352011. [DOI] [PubMed] [Google Scholar]
- 20.Rivero S.J., Diaz-Jouanen E., Alarcon-Segovia D. Lymphopenia in systemic lupus erythematosus Clinical, diagnostic, and prognostic significance. Arthritis Rheum. 1978;21:295–305. doi: 10.1002/art.1780210302. [DOI] [PubMed] [Google Scholar]
- 21.Morell F., Levy G., Orriols R., Ferrer J., De Gracia J., Sampol G. Delayed cutaneous hypersensitivity tests and lymphopenia as activity markers in sarcoidosis. Chest. 2002;121:1239–1244. doi: 10.1378/chest.121.4.1239. [DOI] [PubMed] [Google Scholar]
- 22.Wahlstrom J., Berlin M., Skold C.M., Wigzell H., Eklund A., Grunewald J. Phenotypic analysis of lymphocytes and monocytes/macrophages in peripheral blood and bronchoalveolar lavage fluid from patients with pulmonary sarcoidosis. Thorax. 1999;54:339–346. doi: 10.1136/thx.54.4.339. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 23.Godeau B., Mainardi J.L., Roudot-Thoraval F., Hachulla E., Guillevin L., Huong Du L.T. Factors associated with Pneumocystis carinii pneumonia in Wegener's granulomatosis. Ann Rheum Dis. 1995;54:991–994. doi: 10.1136/ard.54.12.991. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 24.Heimann T.M., Bolnick K., Aufses A.H., Jr. Prognostic significance of severe preoperative lymphopenia in patients with Crohn's disease. Ann Surg. 1986;203:132–135. doi: 10.1097/00000658-198602000-00004. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 25.Wasmuth-Pietzuch A., Hansmann M., Bartmann P., Heep A. Congenital chylothorax: lymphopenia and high risk of neonatal infections. Acta Paediatr. 2004;93:220–224. doi: 10.1080/08035250310007312. [DOI] [PubMed] [Google Scholar]
- 26.Fries B.C., Khaira D., Pepe M.S., Torok-Storb B. Declining lymphocyte counts following cytomegalovirus (CMV) infection are associated with fatal CMV disease in bone marrow transplant patients. Exp Hematol. 1993;21:1387–1392. [PubMed] [Google Scholar]
- 27.Liu C.L., Lu Y.T., Peng M.J., Chen P.J., Lin R.L., Wu C.L., et al Clinical and laboratory features of severe acute respiratory syndrome vis-a-vis onset of fever. Chest. 2004;126:509–517. doi: 10.1378/chest.126.2.509. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 28.Uppal S.S., Tewari S.C., Verma S., Dhot P.S. Comparison of CD4 and CD8 lymphocyte counts in HIV-negative pulmonary TB patients with those in normal blood donors and the effect of antitubercular treatment: hospital-based flow cytometric study. Cytometry B Clin Cytom. 2004;61:20–26. doi: 10.1002/cyto.b.20018. [DOI] [PubMed] [Google Scholar]
- 29.Grossbard L.J., Desai M.H., Lemeshow S., Teres D. Lymphocytopenia in the surgical intensive care unit patient. Am Surg. 1984;50:209–212. [PubMed] [Google Scholar]
- 30.Bloemena E., Weinreich S., Schellekens P.T. The influence of prednisolone on the recirculation of peripheral blood lymphocytes in vivo. Clin Exp Immunol. 1990;80:460–466. doi: 10.1111/j.1365-2249.1990.tb03310.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 31.Fernandez-Fresnedo G., Ramos M.A., Gonzalez-Pardo M.C., de Francisco A.L., Lopez-Hoyos M., Arias M. B lymphopenia in uremia is related to an accelerated in vitro apoptosis and dysregulation of Bcl-2. Nephrol Dial Transplant. 2000;15:502–510. doi: 10.1093/ndt/15.4.502. [DOI] [PubMed] [Google Scholar]
- 32.Matsumoto Y., Shinzato T., Amano I., Takai I., Kimura Y., Morita H. Relationship between susceptibility to apoptosis and Fas expression in peripheral blood T cells from uremic patients: a possible mechanism for lymphopenia in chronic renal failure. Biochem Biophys Res Commun. 1995;215:98–105. doi: 10.1006/bbrc.1995.2438. [DOI] [PubMed] [Google Scholar]
- 33.Wolday D., Tsegaye A., Messele T. Low absolute CD4 counts in Ethiopians. Ethiop Med J. 2002;40:11–16. [PubMed] [Google Scholar]
- 34.Specht L., Nissen N.I. Prognostic factors in Hodgkin's disease stage IV. Eur J Haematol. 1988;41:359–367. doi: 10.1111/j.1600-0609.1988.tb00210.x. [DOI] [PubMed] [Google Scholar]
- 35.Claude L., Perol D., Ray-Coquard I., Petit T., Blay J.Y., Carrie C. Lymphopenia: A new independent prognostic factor for survival in patients treated with whole brain radiotherapy for brain metastases from breast carcinoma. Radiother Oncol. 2005 doi: 10.1016/j.radonc.2005.06.004. [DOI] [PubMed] [Google Scholar]
- 36.Duncan R.A., von Reyn C.F., Alliegro G.M., Toossi Z., Sugar A.M., Levitz S.M. Idiopathic CD4+ T-lymphocytopenia--four patients with opportunistic infections and no evidence of HIV infection. N Engl J Med. 1993;328:393–398. doi: 10.1056/NEJM199302113280604. [DOI] [PubMed] [Google Scholar]
- 37.Smith D.K., Neal J.J., Holmberg S.D. Unexplained opportunistic infections and CD4+ T-lymphocytopenia without HIV infection An investigation of cases in the United States. The Centers for Disease Control Idiopathic CD4+ T-lymphocytopenia Task Force. N Engl J Med. 1993;328:373–379. doi: 10.1056/NEJM199302113280601. [DOI] [PubMed] [Google Scholar]