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genetic immunodeficiencies

congenital immunodeficiencies, primary immunodeficiencies, constitutional immunodeficiencies

 

Types

-  predominant antibody deficiencies

-  combined immunodeficiencies

-  immunodeficiency syndrome-associated phenotypic anomalies

-  phagocytic function diseases (defects in phagocytes)(#11106721#)

-  CD18 deficiency (LFA1 deficiency) (type 1 leukocyte adhesion defect)
-  type 2 leukocyte adhesion deffect (GDP mannose conversion to fucose deficiency)

-  complement deficiencies

-  immunodeficiency associated with other diseases (secondary immunodeficiencies)

-  immunodeficiency with chromosomal disease

-  immunodeficiency with constitutional skeletal diseases

-  immunodeficiency with generalized growth retardation

-  immunodeficiency with skin diseases

-  immunodeficiency with hereddtary metabolic diseases

-  increased immunoglobulin loss

-  miscellaneous

References

-  Lim MS, Elenitoba-Johnson KS. The molecular pathology of primary immunodeficiencies. J Mol Diagn. 2004 May;6(2):59-83 . PMID: #15096561#

-  Lekstrom-Himes JA, Gallin JI. Immunodeficiency diseases caused by defects in phagocytes. N Engl J Med. 2000 Dec 7;343(23):1703-14. PMID: #11106721#

-  Buckley RH. Primary immunodeficiency diseases due to defects in lymphocytes. N Engl J Med. 2000 Nov 2;343(18):1313-24. PMID: #11058677#

-  Elenitoba-Johnson KS, Jaffe ES. Lymphoproliferative disorders associated with congenital immunodeficiencies. Semin Diagn Pathol. 1997 Feb;14(1):35-47. PMID: #9044508#

-  Huber J, Zegers BJ, Schuurman HJ. Pathology of congenital immunodeficiencies. Semin Diagn Pathol. 1992 Feb;9(1):31-62. PMID: #1561487#


Primary immunodeficiencies and maturation of T and B Lymphocytes. -

From N Engl J Med. 1995 Aug 17;333(7):431-40

Progenitor cells derived from hematopoietic stem cells enter the thymus and undergo several stages of maturation, during which the and chains of the T-cell receptor and the five chains of CD3 are expressed.1 Immature T cells transiently express both CD4 and CD8. The interaction of CD4 with MHC class II molecules or of CD8 with MHC class I molecules on thymic stromal cells is instrumental in determining whether the cells will survive to become mature CD4+ or CD8+ T cells.2

Lymphoid progenitor B cells interact with neighboring stromal cells in bone marrow to give rise to a population of pre-B cells.3 Pre-B cells first express µ heavy chains in their cytoplasm and then an IgM-receptor complex. The transmembrane immunoglobulin and signal-transduction unit, which is analogous to T-cell CD3, is also expressed.4 The pre -B cells subsequently express and light chains to become IgM-bearing mature B cells committed to an antibody specificity that they and their mature plasma-cell progeny will produce.5 On leaving the bone marrow, IgM-bearing B cells acquire surface IgD. These mature B cells can respond positively to an antigen and to help from CD4 T cells by undergoing proliferation and differentiation; ultimately, they secrete antibody of all the immunoglobulin classes.

The red bars indicate where maturation is blocked in autosomal recessive and X-linked severe combined immunodeficiency, X-linked agammaglobulinemia, MHC class I and II deficiencies, and the hyper-IgM syndrome.



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