Disorders of adaptive immunity [DS:H02526] Primary immunodeficiency disease [DS:H01725]
Description
There are three major categories of antibody deficiencies: (a) defects in early B cell development, (b) hyper-IgM syndromes (also called class switch recombination defects), and (c) common variable immunodeficiency (CVID). Category (a) consists of agammaglobulinaemias (AGM). Defects in early B cell development are characterized by the onset of recurrent bacterial infections in the first 5 years of life, profound hypogammaglobulinemia, markedly reduced or absent B cells in the peripheral circulation, and (in the bone marrow) a severe block in B cell differentiation before the production of surface immunoglobulin-positive B cells. Mutations in Btk, the gene responsible for X-linked agammaglobulinemia (XLA), account for approximately 85% of affected patients. Approximately half of the remaining patients have mutations in genes encoding components of the pre-B cell receptor (pre-BCR) or BCR, including mu heavy chain (IGHM); the signal transduction molecules Ig-alpha (CD79A) and Ig-beta (CD79B); and lambda 5 (IGLL1), which forms the surrogate light chain with Vpre-B. A small number of patients with defects in BLNK, a scaffold protein that assembles signal transduction molecules activated by cross-linking of the BCR, have been reported.
Category
Immune system disease
Brite
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
H00085 Agammaglobulinemias
Pathway-based classification of diseases [BR:br08402]
Immune system
nt06537 TCR/BCR signaling
H00085 Agammaglobulinemias
Clinical characteristics and prenatal diagnosis for 22 families in Henan Province of China with X-linked agammaglobulinemia (XLA) related to Bruton's tyrosine kinase (BTK) gene mutations.
Growth hormone deficiency, formerly known as Pituitary dwarfism, is a heterogeneous condition characterized by growth retardation with short stature and normal body proportions caused by growth hormone deficiency.
Category
Endocrine and metabolic disease
Brite
Human diseases in ICD-11 classification [BR:br08403]
05 Endocrine, nutritional or metabolic diseases
Endocrine diseases
Disorders of the pituitary hormone system
5A61 Hypofunction or certain other specified disorders of pituitary gland
H00254 Growth hormone deficiency
Pathway-based classification of diseases [BR:br08402]
Immune system
nt06537 TCR/BCR signaling
H00254 Growth hormone deficiency
Endocrine system
nt06324 GHRH-GH-IGF signaling
H00254 Growth hormone deficiency
Pantel J, Legendre M, Cabrol S, Hilal L, Hajaji Y, Morisset S, Nivot S, Vie-Luton MP, Grouselle D, de Kerdanet M, Kadiri A, Epelbaum J, Le Bouc Y, Amselem S
Title
Loss of constitutive activity of the growth hormone secretagogue receptor in familial short stature.