U.S. flag

An official website of the United States government

Format

Send to:

Choose Destination

Severe combined immunodeficiency due to CTPS1 deficiency(IMD24)

MedGen UID:
863054
Concept ID:
C4014617
Disease or Syndrome
Synonym: Immunodeficiency 24
Modes of inheritance:
Autosomal recessive inheritance
MedGen UID:
141025
Concept ID:
C0441748
Intellectual Product
Source: Orphanet
A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in individuals with two pathogenic alleles, either homozygotes (two copies of the same mutant allele) or compound heterozygotes (whereby each copy of a gene has a distinct mutant allele).
 
Gene (location): CTPS1 (1p34.2)
 
Monarch Initiative: MONDO:0014391
OMIM®: 615897
Orphanet: ORPHA420573

Definition

IMD24 is an autosomal recessive immunodeficiency characterized by the impaired capacity of activated T and B cells to proliferate in response to antigen receptor-mediated activation. Patients have early onset of severe chronic viral infections, mostly caused by herpesviruses, including Epstein-Barr virus (EBV) and varicella zoster virus (VZV); they also suffer from recurrent encapsulated bacterial infections, a spectrum typical of a combined deficiency of adaptive immunity (CID) (summary by Martin et al., 2014). [from OMIM]

Clinical features

From HPO
Lymphoproliferative disorder
MedGen UID:
6162
Concept ID:
C0024314
Neoplastic Process
A disorder characterized by proliferation of lymphocytes at various stages of differentiation. Lymphoproliferative disorders can be neoplastic (clonal, as in lymphomas and leukemias) or reactive (polyclonal, as in infectious mononucleosis).
Respiratory tract infection
MedGen UID:
11199
Concept ID:
C0035243
Disease or Syndrome
An infection of the upper or lower respiratory tract.
Immunodeficiency
MedGen UID:
7034
Concept ID:
C0021051
Disease or Syndrome
Failure of the immune system to protect the body adequately from infection, due to the absence or insufficiency of some component process or substance.
Lymphopenia
MedGen UID:
7418
Concept ID:
C0024312
Disease or Syndrome
A reduced number of lymphocytes in the blood.
Decreased CD4:CD8 ratio
MedGen UID:
163125
Concept ID:
C0853905
Finding
An abnormal reduction of the relative proportion of CD4+ to CD8+ T cells.
Recurrent viral infections
MedGen UID:
332357
Concept ID:
C1837066
Finding
Increased susceptibility to viral infections, as manifested by recurrent episodes of viral infection.
Severe viral infection
MedGen UID:
479058
Concept ID:
C3277428
Finding
An unusually severe viral infection.
Decreased circulating IgG2 level
MedGen UID:
867187
Concept ID:
C4021545
Finding
A reduction in immunoglobulin levels of the IgG2 subclass in the blood circulation.
Defective T cell proliferation
MedGen UID:
868165
Concept ID:
C4022557
Cell or Molecular Dysfunction
A reduced ability of a T cell population to expand by cell division following T cell activation.
Decreased specific pneumococcal antibody level
MedGen UID:
868496
Concept ID:
C4022890
Finding
The presence of normal overall immunoglobulin levels with deficiency of specific immunoglobulins directed against pneumococci.
Decreased proportion of memory B cells
MedGen UID:
893145
Concept ID:
C4072913
Finding
A reduction in the normal proportion of memory B cells (CD19+/CD27+) in circulation relative to the total number of B cells. Memory B cells develop from naive B cells. Upon antigen rechallenge, memory B cells rapidly expand and differentiate into plasma cells under the cognate control of memory Th cells (Phase IV).
Reduced antigen-specific T cell proliferation
MedGen UID:
1621145
Concept ID:
C4531148
Finding
Impaired proliferation and expansion of a T cell population following activation by an antigenic stimulus.
Severe varicella zoster infection
MedGen UID:
1688785
Concept ID:
C5139168
Disease or Syndrome
An unusually severe form of varicella zoster virus (VZV) infection. In the majority of the cases, especially in children, varicella is a very mild infection characterised by skin lesions, low grade fever and malaise. Severe infection is characterized by manifestions including VZV pneumonia, hepatitis, meningitis, and disseminated varicella.
Persistent viremia
MedGen UID:
1692312
Concept ID:
C5139222
Finding
Persistence of virus in the blood circulation longer than would be normal in an immunocompetent host.
Partial absence of specific antibody response to tetanus vaccine
MedGen UID:
1699537
Concept ID:
C5139460
Finding
A reduced ability to synthesize postvaccination antibodies against a tetanus antigen, as measured by antibody titer determination following vaccination.
Decreased circulating IgG level
MedGen UID:
1720114
Concept ID:
C5234937
Finding
An abnormally decreased level of immunoglobulin G (IgG) in blood.
Reduced proportion of mucosal-associated invariant T cells
MedGen UID:
1782351
Concept ID:
C5539885
Finding
A decreased proportion of circulating mucosal-associated invariant T (MAIT) cells relative to total T cell count.

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVSevere combined immunodeficiency due to CTPS1 deficiency

Recent clinical studies

Etiology

Cohen JI
Curr Top Microbiol Immunol 2015;390(Pt 1):241-65. doi: 10.1007/978-3-319-22822-8_10. PMID: 26424649Free PMC Article

Diagnosis

Alonso L, Méndez-Echevarría A, Rudilla F, Mozo Y, Soler-Palacin P, Sisinni L, Bueno D, Riviere J, de Paz R, Sánchez-Zapardiel E, Querol S, Rodriguez-Pena R, López-Granados E, Gimeno R, Díaz de Heredia C, Pérez-Martínez A
J Clin Immunol 2021 May;41(4):748-755. Epub 2021 Jan 18 doi: 10.1007/s10875-020-00961-w. PMID: 33462728
Chinen J, Notarangelo LD, Shearer WT
J Allergy Clin Immunol 2015 May;135(5):1132-41. doi: 10.1016/j.jaci.2015.02.037. PMID: 25956014

Therapy

Alonso L, Méndez-Echevarría A, Rudilla F, Mozo Y, Soler-Palacin P, Sisinni L, Bueno D, Riviere J, de Paz R, Sánchez-Zapardiel E, Querol S, Rodriguez-Pena R, López-Granados E, Gimeno R, Díaz de Heredia C, Pérez-Martínez A
J Clin Immunol 2021 May;41(4):748-755. Epub 2021 Jan 18 doi: 10.1007/s10875-020-00961-w. PMID: 33462728

Supplemental Content

Table of contents

    Clinical resources

    Practice guidelines

    • Bookshelf
      See practice and clinical guidelines in NCBI Bookshelf. The search results may include broader topics and may not capture all published guidelines. See the FAQ for details.

    Recent activity

    Your browsing activity is empty.

    Activity recording is turned off.

    Turn recording back on

    See more...