List of primary immunodeficiencies

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This is a list of primary immunodeficiencies (PID), which are immune deficiencies that are not secondary to another condition.

Contents

The International Union of Immunological Societies recognizes nine classes of primary immunodeficiencies, totaling approximately 430 conditions. [1] [2] A 2014 update of the classification guide added a 9th category and added 30 new gene defects from the prior 2009 version. [3] [4] The most recent classification was released in 2019. [5] The number of identified conditions continues to grow over time as more research is done.

The impact of primary immunodeficiencies ranges from mild to severe based on the condition. [6]

Combined T and B–cell immunodeficiencies

Genetic immunodeficiencies. (In general, those on the left are in Table I, while those on the right are in Table II, but there are exceptions.) Genetic Immunodeficiencies.svg
Genetic immunodeficiencies. (In general, those on the left are in Table I, while those on the right are in Table II, but there are exceptions.)

In these disorders both T lymphocytes and often B lymphocytes, regulators of adaptive immunity, are dysfunctional or decreased in number. The main members are various types of severe combined immunodeficiency (SCID). [7]

Predominantly antibody deficiencies

In primary antibody deficiencies, one or more isotypes of immunoglobulin are decreased or don't function properly. These proteins, generated by plasma cells, normally bind to pathogens, targeting them for destruction. [7]

Other well defined immunodeficiency syndrome

A number of syndromes escape formal classification but are otherwise recognizable by particular clinical or immunological features. [7]

Diseases of immune dysregulation

In certain conditions, the regulation rather than the intrinsic activity of parts of the immune system is the predominant problem. [7]

Congenital defects of phagocyte number, function, or both

Phagocytes are the cells that engulf and ingest pathogens (phagocytosis), and destroy them with chemicals. Monocytes/macrophages as well as granulocytes are capable of this process. In certain conditions, either the number of phagocytes is reduced or their functional capacity is impaired. [7]

Defects in innate immunity

Several rare conditions are due to defects in the innate immune system, which is a basic line of defense that is independent of the more advanced lymphocyte-related systems. Many of these conditions are associated with skin problems. [7]

Autoinflammatory disorders

Rather than predisposing for infections, most of the autoinflammatory disorders lead to excessive inflammation. Many manifest themselves as periodic fever syndromes. They may involve various organs directly, as well as predisposing for long-term damage (e.g. by leading to amyloid deposition). [7]

Complement deficiencies

The complement system is part of the innate as well as the adaptive immune system; it is a group of circulating proteins that can bind pathogens and form a membrane attack complex. Complement deficiencies are the result of a lack of any of these proteins. They may predispose to infections but also to autoimmune conditions. [7]

Phenocopies of primary immune deficiencies

Related Research Articles

<span class="mw-page-title-main">Thymus</span> Endocrine gland

The thymus is a specialized primary lymphoid organ of the immune system. Within the thymus, thymus cell lymphocytes or T cells mature. T cells are critical to the adaptive immune system, where the body adapts to specific foreign invaders. The thymus is located in the upper front part of the chest, in the anterior superior mediastinum, behind the sternum, and in front of the heart. It is made up of two lobes, each consisting of a central medulla and an outer cortex, surrounded by a capsule.

Immunodeficiency, also known as immunocompromisation, is a state in which the immune system's ability to fight infectious diseases and cancer is compromised or entirely absent. Most cases are acquired ("secondary") due to extrinsic factors that affect the patient's immune system. Examples of these extrinsic factors include HIV infection and environmental factors, such as nutrition. Immunocompromisation may also be due to genetic diseases/flaws such as SCID.

<span class="mw-page-title-main">Wiskott–Aldrich syndrome</span> Medical condition

Wiskott–Aldrich syndrome (WAS) is a rare X-linked recessive disease characterized by eczema, thrombocytopenia, immune deficiency, and bloody diarrhea. It is also sometimes called the eczema-thrombocytopenia-immunodeficiency syndrome in keeping with Aldrich's original description in 1954. The WAS-related disorders of X-linked thrombocytopenia (XLT) and X-linked congenital neutropenia (XLN) may present with similar but less severe symptoms and are caused by mutations of the same gene.

Hypogammaglobulinemia is an immune system disorder in which not enough gamma globulins are produced in the blood. This results in a lower antibody count, which impairs the immune system, increasing risk of infection. Hypogammaglobulinemia may result from a variety of primary genetic immune system defects, such as common variable immunodeficiency, or it may be caused by secondary effects such as medication, blood cancer, or poor nutrition, or loss of gamma globulins in urine, as in nonselective glomerular proteinuria. Patients with hypogammaglobulinemia have reduced immune function; important considerations include avoiding use of live vaccines, and take precautionary measures when traveling to regions with endemic disease or poor sanitation such as receiving immunizations, taking antibiotics abroad, drinking only safe or boiled water, arranging appropriate medical cover in advance of travel, and ensuring continuation of any immunoglobulin infusions needed.

Hyperimmunoglobulinemia E syndrome (HIES), of which the autosomal dominant form is called Job's syndrome or Buckley syndrome, is a heterogeneous group of immune disorders. Job's is also very rare at about 300 cases currently in the literature.

<span class="mw-page-title-main">X-linked severe combined immunodeficiency</span> Medical condition

X-linked severe combined immunodeficiency (X-SCID) is an immunodeficiency disorder in which the body produces very few T cells and NK cells.

<span class="mw-page-title-main">Dysgammaglobulinemia</span> Type of immune disorder

Dysgammaglobulinemia is a type of immune disorder characterized by a reduction in some types of gamma globulins, resulting in heightened susceptibility to some infectious diseases where primary immunity is antibody based.

<span class="mw-page-title-main">Hyper IgM syndrome</span> Primary immune deficiency disorders

Hyper IgM syndrome is a rare primary immune deficiency disorders characterized by low or absent levels of serum IgG, IgA, IgE and normal or increased levels of serum IgM.

<span class="mw-page-title-main">Hyper-IgM syndrome type 2</span> Primary immune deficiency disorder

Hyper IgM syndrome type 2 is a rare disease. Unlike other hyper-IgM syndromes, type 2 patients identified thus far did not present with a history of opportunistic infections. One would expect opportunistic infections in any immunodeficiency syndrome. The responsible genetic lesion is in the AICDA gene found at 12p13.

<span class="mw-page-title-main">Hyper-IgM syndrome type 5</span> Primary immune deficiency disorder

The fifth type of hyper-IgM syndrome has been characterized in three patients from France and Japan. The symptoms are similar to hyper IgM syndrome type 2, but the AICDA gene is intact.

Primary immunodeficiencies are disorders in which part of the body's immune system is missing or does not function normally. To be considered a primary immunodeficiency (PID), the immune deficiency must be inborn, not caused by secondary factors such as other disease, drug treatment, or environmental exposure to toxins. Most primary immunodeficiencies are genetic disorders; the majority are diagnosed in children under the age of one, although milder forms may not be recognized until adulthood. While there are over 430 recognized inborn errors of immunity (IEIs) as of 2019, the vast majority of which are PIDs, most are very rare. About 1 in 500 people in the United States are born with a primary immunodeficiency. Immune deficiencies can result in persistent or recurring infections, auto-inflammatory disorders, tumors, and disorders of various organs. There are currently limited treatments available for these conditions; most are specific to a particular type of PID. Research is currently evaluating the use of stem cell transplants (HSCT) and experimental gene therapies as avenues for treatment in limited subsets of PIDs.

An immune disorder is a dysfunction of the immune system. These disorders can be characterized in several different ways:

<span class="mw-page-title-main">Hyper-IgM syndrome type 3</span> Primary immune deficiency disorder

Hyper-IgM syndrome type 3 is a form of hyper IgM syndrome characterized by mutations of the CD40 gene. In this type, Immature B cells cannot receive signal 2 from helper T cells which is necessary to mature into mature B cells.

<span class="mw-page-title-main">Hyper-IgM syndrome type 4</span> Medical condition

Hyper-IgM syndrome type 4 is a form of Hyper IgM syndrome which is a defect in class switch recombination downstream of the AICDA gene that does not impair somatic hypermutation.

<span class="mw-page-title-main">X-linked reticulate pigmentary disorder</span> Rare X-linked genetic condition

X-linked reticulate pigmentary disorder is a rare X-linked genetic condition in which males manifest multiple systemic symptoms and a reticulated mottled brown pigmentation of the skin, which, on biopsy, demonstrated dermal deposits of amyloid. Females usually only have linear streaks of hyperpigmentation.

<span class="mw-page-title-main">CD25 deficiency</span> Medical condition

CD25 deficiency or interleukin 2 receptor alpha deficiency is an immunodeficiency disorder associated with mutations in the interleukin 2 receptor alpha (CD25) (IL2RA) gene. The mutations cause expression of a defective α chain or complete absence thereof, an essential part of high-affinity interleukin-2 (IL-2) receptors. The result is a syndrome described as IPEX-like or a SCID.

Mendelian susceptibility to mycobacterial disease (MSMD) is a rare genetic disease. It is a primary immunodeficiency featured by molecular defects in IL12/IFNγ dependent signalling pathway, leading to increased susceptibility to local or disseminated infections by environmental mycobacteria, Mycobacterium bovis Bacille Calmette-Guerin strain, nontyphoidal and typhoidal Salmonella serotypes.

Nuclear factor-kappa B Essential Modulator (NEMO) deficiency syndrome is a rare type of primary immunodeficiency disease that has a highly variable set of symptoms and prognoses. It mainly affects the skin and immune system but has the potential to affect all parts of the body, including the lungs, urinary tract and gastrointestinal tract. It is a monogenetic disease caused by mutation in the IKBKG gene. NEMO is the modulator protein in the IKK inhibitor complex that, when activated, phosphorylates the inhibitor of the NF-κB transcription factors allowing for the translocation of transcription factors into the nucleus.

An innate immune defect is a defect in the innate immune response that blunts the response to infection. These defects may occur in monocytes, neutrophils, natural killer cells, basophils, mast cells or complement proteins.

References

  1. Bousfiha, Aziz; Jeddane, Leïla; Picard, Capucine; Ailal, Fatima; Bobby Gaspar, H.; Al-Herz, Waleed; Chatila, Talal; Crow, Yanick J. (2018). "The 2017 IUIS Phenotypic Classification for Primary Immunodeficiencies". Journal of Clinical Immunology. 38 (1): 129–143. doi:10.1007/s10875-017-0465-8. ISSN   0271-9142. PMC   5742599 . PMID   29226301.
  2. Tangye, Stuart G.; Al-Herz, Waleed; Bousfiha, Aziz; Chatila, Talal; Cunningham-Rundles, Charlotte; Etzioni, Amos; Franco, Jose Luis; Holland, Steven M.; Klein, Christoph; Morio, Tomohiro; Ochs, Hans D. (2020-01-01). "Human Inborn Errors of Immunity: 2019 Update on the Classification from the International Union of Immunological Societies Expert Committee". Journal of Clinical Immunology. 40 (1): 24–64. doi:10.1007/s10875-019-00737-x. ISSN   1573-2592. PMC   7082301 . PMID   31953710.
  3. Waleed Al-Herz; Aziz Bousfiha; Jean-Laurent Casanova; et al. (2014). "Primary immunodeficiency diseases: an update on the classification from the International Union of Immunological Societies Expert Committee for Primary Immunodeficiency" (PDF). Frontiers in Immunology. 5 (162): 1–33. doi: 10.3389/fimmu.2014.00162 . PMC   4001072 . PMID   24795713.
  4. Notarangelo L, Casanova JL, Conley ME, et al. (2006). "Primary immunodeficiency diseases: an update from the International Union of Immunological Societies Primary Immunodeficiency Diseases Classification Committee Meeting in Budapest, 2005". J. Allergy Clin. Immunol. 117 (4): 883–96. doi: 10.1016/j.jaci.2005.12.1347 . PMID   16680902.
  5. Tangye, Stuart G.; Al-Herz, Waleed; Bousfiha, Aziz; Chatila, Talal; Cunningham-Rundles, Charlotte; Etzioni, Amos; Franco, Jose Luis; Holland, Steven M.; Klein, Christoph; Morio, Tomohiro; Ochs, Hans D. (2020-01-01). "Human Inborn Errors of Immunity: 2019 Update on the Classification from the International Union of Immunological Societies Expert Committee". Journal of Clinical Immunology. 40 (1): 24–64. doi:10.1007/s10875-019-00737-x. ISSN   1573-2592. PMC   7082301 . PMID   31953710.
  6. "Common Variable Immune Deficiency". NORD (National Organization for Rare Disorders). Retrieved 5 March 2019.
  7. 1 2 3 4 5 6 7 8 Notarangelo LD, Fischer A, Geha RS, et al. (December 2009). "Primary immunodeficiencies: 2009 update: The International Union of Immunological Societies (IUIS) Primary Immunodeficiencies (PID) Expert Committee". J. Allergy Clin. Immunol. 124 (6): 1161–78. doi:10.1016/j.jaci.2009.10.013. PMC   2797319 . PMID   20004777.