KEGG   DISEASE: T-B+Severe combined immunodeficiency
H00091                      Disease                                
T-B+Severe combined immunodeficiency
Disorders of adaptive immunity [DS:H02526]
Primary immunodeficiency disease [DS:H01725]
Severe combined immunodeficiency (SCID) comprises a heterogeneous group of monogenic disorders that result in early-onset severe infections by a range of pathogens (such as bacteria, viruses and fungi). Typically, patients with SCID have a severe defect in T-cell differentiation, along with direct or indirect impairment of B-cell development and function. SCIDs with lack of circulating T cells but a normal number of B cells accounts for 30 to 50% of all cases of human SCIDs. The most frequent form of SCID, X-linked SCID (SCID-X1), is caused by mutations in the gamma-chain-encoding gene. Gamma-chain is a common subunit shared by several cytokine receptors. It results in an absence of both mature T lymphocytes and NK lymphocytes. The second most common variant is autosomal recessive and due to mutations of the JAK3 gene. IL-7R alpha gene mutations result in a pure T-cell deficiency. Rare cases of SCID consisting of pure T-cell deficiencies have been attributed to defects in key proteins involved in pre-TCR/TCR signaling. Deficiency in the CD45 phosphatase has been reported in two cases of SCID, while defects in CD3 delta, CD3 epsilon and CD3 zeta have also been described.
Primary immunodeficiency
Human diseases [BR:br08402]
 Immune system diseases
  Primary immunodeficiency
   H00091  T-B+Severe combined immunodeficiency
Human diseases in ICD-11 classification [BR:br08403]
 04 Diseases of the immune system
  Primary immunodeficiencies
   4A01  Primary immunodeficiencies due to disorders of adaptive immunity
    H00091  T-B+Severe combined immunodeficiency
hsa05340  Primary immunodeficiency
hsa04659  Th17 cell differentiation
hsa04658  Th1 and Th2 cell differentiation
IL2RG [HSA:3561] [KO:K05070]
JAK3 [HSA:3718] [KO:K11218]
IL7R [HSA:3575] [KO:K05072]
PTPRC [HSA:5788] [KO:K06478]
CD3D [HSA:915] [KO:K06450]
CD3E [HSA:916] [KO:K06451]
CD247 [HSA:919] [KO:K06453]
CORO1A [HSA:11151] [KO:K13882]
BCL11B [HSA:64919] [KO:K22046]
Other DBs
ICD-11: 4A01.10
ICD-10: D81
MeSH: D053632
OMIM: 608971 300400 606367 610163 615401 617237
Fischer A, Le Deist F, Hacein-Bey-Abina S, Andre-Schmutz I, Basile Gde S, de Villartay JP, Cavazzana-Calvo M.
Severe combined immunodeficiency. A model disease for molecular immunology and therapy.
Immunol Rev 203:98-109 (2005)
Morra M, Geigenmuller U, Curran J, Rainville IR, Brennan T, Curtis J, Reichert V, Hovhannisyan H, Majzoub J, Miller DT.
Genetic diagnosis of primary immune deficiencies.
Immunol Allergy Clin North Am 28:387-412, x (2008)
Geha RS, Notarangelo LD, Casanova JL, Chapel H, Conley ME, Fischer A, Hammarstrom L, Nonoyama S, Ochs HD, Puck JM, Roifman C, Seger R, Wedgwood J.
Primary immunodeficiency diseases: an update from the International Union of Immunological Societies Primary Immunodeficiency Diseases Classification Committee.
J Allergy Clin Immunol 120:776-94 (2007)
PMID:26482257 (IL2RG, JAK3, IL7R, PTPRC, CD3D, CD3E, CD247, CORO1A)
Picard C, Al-Herz W, Bousfiha A, Casanova JL, Chatila T, Conley ME, Cunningham-Rundles C, Etzioni A, Holland SM, Klein C, Nonoyama S, Ochs HD, Oksenhendler E, Puck JM, Sullivan KE, Tang ML, Franco JL, Gaspar HB
Primary Immunodeficiency Diseases: an Update on the Classification from the International Union of Immunological Societies Expert Committee for Primary Immunodeficiency 2015.
J Clin Immunol 35:696-726 (2015)
PMID:27959755 (BCL11B)
Punwani D, Zhang Y, Yu J, Cowan MJ, Rana S, Kwan A, Adhikari AN, Lizama CO, Mendelsohn BA, Fahl SP, Chellappan A, Srinivasan R, Brenner SE, Wiest DL, Puck JM
Multisystem Anomalies in Severe Combined Immunodeficiency with Mutant BCL11B.
N Engl J Med 375:2165-2176 (2016)

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