Selective immunoglobulin A deficiency
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:
Synonyms and keywords:
Overview
Selective Immunoglobulin A( IgA) deficiency is the most common primary immunodeficiency and is defined as "serum level of IgA equal or below 7mg/dl in the presence of normal level of other immunoglobulins in individuals older than four years of age and in which other causes of hypogammaglobulinemia have been excluded.[1]
Historical Perspective
- Immunoglobulin A was first discovered in the serum by Graber and Williams in 1953.
- Within 10 years, the first cases with selective IgA deficiency were identified in healthy as well as in patients with ataxia telangiectasia.[2][3]
Classification
Selective IgA deficiency can be classified based on either the laboratory values of B-cells subsets or the clinical phenotype of individuals with the condition.
Classification Based on Memory B cell Population
SIgAD can be classified based on the laboratory values of the B-cell subsets such as naive, IgM memory, switched memory or IgM+CD21- B cells in patients as compared to healthy individuals.[4]
Percentage of switched Memory B cells (CD 19+, CD 21+, IgD-) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
SIgAD1 Less than 0.4% of switched memory B cells (CD19+, CD21+, IgD-) | SIgAD2 Greater than 0.4% of switched memory B cells (CD19+, CD21+, IgD-) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Classification Based on the Clinical Presentation
- Health related quality of life(HRQL) can be compromised by the severity of symptoms in patients with selective IgA deficiency. It is classified based on the clinical presentation of the patients suffering from it.[5][6][7][8][9][10][11][12][13][14][15]
Clinical Phenotypes | Description |
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Asymptomatic |
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Minor Infections |
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Allergy |
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Autoimmune |
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Severe symptoms |
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Pathophysiology
Pathogenesis
- Several studies were carried out to establish the mechanism involved in selective IgA immunodeficiency but the exact pathogensis is still not clear.
- SIgAD has been attributed to an intrinsic B cell lymphocyte defect, T cell lymphocyte abnormalities and most recently an impairment in cytokine regulation indicating that it is a heterogenous dysfunction.[8][16][17]
- The most common pathological process involved in patients with selective immunoglobulin A deficiency is a maturation defect in B cells to produce IgA.[18]
- Normally, the surface immunoglobulins are acquired in a sequential manner in B- cell differentiation. The first surface immunoglobulin to appear on B cells is IgM, as the cells mature they acquire surface IgD and sometimes IgA or IgG. A fully differentiated B cell performs a specfic function which means it would bear a specfic surface immunoglobulin.It is found that Patients with sIgAD have B cells arrested at a stage where they coexpress surface IgM, IgD as well as IgA and donot develop into IgA secreting plasma cells.[19].
- The abnormality appears to involve stem cells as it can be passed on by bone marrow transplantation.[20]
- Cytokine dysregulation such as lack of IL-4, IL-6, IL-7, IL-10, TGF-b and most recently IL-21 is suggested to play a role in SIgAD[17][21]
Genetics
- Several genetic mutations are associated with SIgAD which suggest its polygenic nature but whtether and how they imply causation is yet to be established.
SIgAD association with MHC and Non MHC Genes | ||||
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MHC Susceptibility genes | Non MHC Susceptibility genes | |||
- Mutation in tumor necrosis factor receptor superfamily member 13B (TNFRSF13B) gene that encodes for tumor necrosis factor receptor superfamily member 13B (TNFRSF13B) protein also known as "transmembrane activator and calcium-modulator and cyclophilin ligand interactor"(TACI), a molecule responsible for isotype switching in B-cells is also found in this condition.[30][31]
Associated Conditions
- Common Variable Immunodeficiency
- Autoimmune Disorders
- Ataxia Telangiectasia[38][39]
- Risk for Cancer
- There is an increased risk of cancer specifically of the gastrointestinal tract in adults. Though children with IgA deficiency are not at increased risk for cancers.[40][41]
Causes
The cause of selective IgA deficiency has not been identified. To review risk factors for the development of this disease, click causes.
Differentiating IgA Deficiency from Other Diseases
IgA defieciency should be differentiated from other disorders leading to hypogammaglobulinemia and defects of humoral immunity. The following conditions may be considered as differentials:[42][43][44][45][46][47][48][1][49][8][50][51][52][53][54][35][55][56][57][58][59][60][61][62][63][64][65][66][62][67][68][69][70][71][72][73][74][75][76][77][31][78][79][80][81][82][83][84][85][86][87]
Disorder | Defect (Mechanism of Development) | Characteristic Features | Clinical Presentation | Laboratory Findings |
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X-Linked (Bruton) Agammaglobulinemia |
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Selective IgA Deficiency |
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Common Variable Immunodeficiency |
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Autosomal dominant hype IgE syndrome (Job's Syndrome) |
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Severe combined immunodeficiency (SCID) |
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Ataxia Telangiectasia |
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Hyper IgM Syndrome |
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Wiskott-Aldrich Syndrome |
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- Malignancy: can cause the reduction in the immunoglobulin production.[88]
- Viral infections: such as Epstein-Barr virus, HIV, cytomegalovirus are other causes of hypogammaglobulinemia..
- Side effect of certain medications: Some drugs include systemic glucocorticoids, phenytoin, and carbamazepine, have been associated with IgG deficiency.[89]
- Other causes of primary humoral immunodeficiencies.
- Smoking: may cause IgG2 subclass deficiency.[90]
- Protein-losing conditions: enteropathies, nephrotic syndrome, burns, and other traumas may cause abnormal loss of immunoglobulins.
fferential dx3].
Epidemiology and Demographics
The incidence/prevalence of [disease name] is approximately [number range] per 100,000 individuals worldwide.
OR
In [year], the incidence/prevalence of [disease name] was estimated to be [number range] cases per 100,000 individuals worldwide.
OR
In [year], the incidence of [disease name] is approximately [number range] per 100,000 individuals with a case-fatality rate of [number range]%.
Patients of all age groups may develop [disease name].
OR
The incidence of [disease name] increases with age; the median age at diagnosis is [#] years.
OR
[Disease name] commonly affects individuals younger than/older than [number of years] years of age.
OR
[Chronic disease name] is usually first diagnosed among [age group].
OR
Selective IgA is more common in caucasians with the prevalence of 1/600
OR
[Disease name] usually affects individuals of the [race 1] race. [Race 2] individuals are less likely to develop [disease name].
[Disease name] affects men and women equally.
OR
[Gender 1] are more commonly affected by [disease name] than [gender 2]. The [gender 1] to [gender 2] ratio is approximately [number > 1] to 1.
The majority of [disease name] cases are reported in [geographical region].
OR
[Disease name] is a common/rare disease that tends to affect [patient population 1] and [patient population 2].
Risk Factors
- Positive family history of IgA deficiency or common variabe immnodeficiency.[91].
- The familial inheritance pattern is variable.[92]
- Moreover peneterance of IgAD in the offspring varies with the gender of the tranmitting parent with affected mother being more likely to transfer the disease to her offspring.[93].
Screening
As high rate of familial inheritance can be seen in families with SIgAD, so It is recommended to do the screening in first-degree relatives of such patients.[94]
Natural History, Complications, and Prognosis
Natural History
- Children less than 4 years of age may have transient IgA defiecncy and have a full recovery.[95].
- Majority of the patients older than 4 years of age with SIgAD remain asymptomatic. Some of them will develop minor infections, allergies, autoimmune conditions and very few cases will have severe symptoms or progress to CVID.[96]
Complications
Prognosis
- Prognosis in patients with selective IgA deficiency depends on the clinical phenotype and is generally good as most of the patient are asymptomatic.
- Sponatanous recovery has been seen in rare cases with partial IgA deficiency.[97]
- In rare occasions, the disease may progress to Combined variable immunodeficiency which doesn't predict a favourable outcome..[11][98]
Diagnostic Criteria
- Selective IgA deficiency is a laboratory finding that may not be associated with significant clinical presentaion.
- Mainly based on direct measurement of serum IgA levels.
- Serum IgA levels less than 0.7 mg/dl in the presence of normal IgG and IgM is diagnostic
- There should be high suspicion of SIgAD in patients having blood transfusion reaction.
Symptoms
- The majority of patients with SIgAD are asymptomatic. when symptomatic patient may present with sinopulmonary infections, gastrointestinal infections, allergies and autoimmune conditions
Physical Examination
Patients with [disease name] usually appear [general appearance]. Physical examination of patients with [disease name] is usually remarkable for [finding 1], [finding 2], and [finding 3].
OR
Common physical examination findings of [disease name] include [finding 1], [finding 2], and [finding 3].
OR
The presence of [finding(s)] on physical examination is diagnostic of [disease name].
OR
The presence of [finding(s)] on physical examination is highly suggestive of [disease name].
Laboratory Findings
- serum IgA less than 0.7 mg/dl with normal levels of IgM and IgG.
Electrocardiogram
There are no ECG findings associated with SIgAD
X-ray
There are no x-ray findings associated with SIgAD.
Echocardiography or Ultrasound
There are no echocardiography/ultrasound findings associated with SIgAD.
CT scan
There are no CT scan findings associated with SIgAD.
MRI
There are no MRI findings associated with SIgAD.
Treatment
- There is no specific treatment for selective IgA deficiency. Individuals can be managed based on their symptoms as the presentation varies.
Medical Therapy
- Antibiotics are used to treat infections in patients with SIgAD.
Primary Prevention
- Selective IgA deficiency can be genetically transmitted and has a variable inheritance pattern and there are no established measures for the primary prevention.
Secondary Prevention and Tertiary Prevention
Effective measures for the secondary and tertiary prevention of selective IgA deficiency include
- Patient education,
- Vaccination,
- Use of prophylactic antibiotics
- Patient Education
- Patient with severe IgA deficiency can have anaphylactic reactions secondary to blood transfusion or its products. It is specifically seen in patients with undetectable serum IgA levels. These patients develop anti IgA antibodies so they should be advised to wear medical alert bracelet.[99][100][1]
- IgA levels should be periodically monitored in asymptomatic patients.
- Vaccination:
- Pneumococcal vaccine is recommended in patients with SIgAD to reduce the risk of sino-pulmonary infections.
- Use of antibiotics:
- Prophylactic antibiotics can be given to patients with SIgAD to prevent infections and other complications.[101]
References
- ↑ 1.0 1.1 1.2 Yel L (January 2010). "Selective IgA deficiency". J. Clin. Immunol. 30 (1): 10–6. doi:10.1007/s10875-009-9357-x. PMC 2821513. PMID 20101521.
- ↑ DUNN HG, MEUWISSEN H, LIVINGSTONE CS, PUMP KK (November 1964). "ATAXIA-TELANGIECTASIA". Can Med Assoc J. 91: 1106–18. PMC 1928365. PMID 14229760.
- ↑ Crabbé PA, Heremans JF (April 1966). "Lack of gamma A-immunoglobulin in serum of patients with steatorrhoea". Gut. 7 (2): 119–27. PMC 1552348. PMID 4160439.
- ↑ Aghamohammadi A, Abolhassani H, Biglari M, Abolmaali S, Moazzami K, Tabatabaeiyan M, Asgarian-Omran H, Parvaneh N, Mirahmadian M, Rezaei N (2011). "Analysis of switched memory B cells in patients with IgA deficiency". Int. Arch. Allergy Immunol. 156 (4): 462–8. doi:10.1159/000323903. PMID 21832837.
- ↑ Jörgensen GH, Gardulf A, Sigurdsson MI, Arnlaugsson S, Hammarström L, Ludviksson BR (March 2014). "Health-related quality of life (HRQL) in immunodeficient adults with selective IgA deficiency compared with age- and gender-matched controls and identification of risk factors for poor HRQL". Qual Life Res. 23 (2): 645–58. doi:10.1007/s11136-013-0491-9. PMID 24022790.
- ↑ Yazdani R, Latif A, Tabassomi F, Abolhassani H, Azizi G, Rezaei N, Aghamohammadi A (2015). "Clinical phenotype classification for selective immunoglobulin A deficiency". Expert Rev Clin Immunol. 11 (11): 1245–54. doi:10.1586/1744666X.2015.1081565. PMID 26306496.
- ↑ Hauge SC, Jensen CK, Nielsen LK, Pedersen OB, Sørensen E, Thørner LW, Hjalgrim H, Erikstrup C, Nielsen KR, Kaspersen KA, Didriksen M, Dziegiel M, Ullum H (March 2018). "The association of IgA deficiency on infection rate, self-perceived health, and levels of C-reactive protein in healthy blood donors". APMIS. 126 (3): 248–256. doi:10.1111/apm.12807. PMID 29484746.
- ↑ 8.0 8.1 8.2 Cunningham-Rundles C (September 2001). "Physiology of IgA and IgA deficiency". J. Clin. Immunol. 21 (5): 303–9. PMID 11720003.
- ↑ Jörgensen GH, Gardulf A, Sigurdsson MI, Arnlaugsson S, Hammarström L, Ludviksson BR (March 2014). "Health-related quality of life (HRQL) in immunodeficient adults with selective IgA deficiency compared with age- and gender-matched controls and identification of risk factors for poor HRQL". Qual Life Res. 23 (2): 645–58. doi:10.1007/s11136-013-0491-9. PMID 24022790.
- ↑ Latiff AH, Kerr MA (March 2007). "The clinical significance of immunoglobulin A deficiency". Ann. Clin. Biochem. 44 (Pt 2): 131–9. doi:10.1258/000456307780117993. PMID 17362578.
- ↑ 11.0 11.1 Aghamohammadi A, Mohammadi J, Parvaneh N, Rezaei N, Moin M, Espanol T, Hammarstrom L (2008). "Progression of selective IgA deficiency to common variable immunodeficiency". Int. Arch. Allergy Immunol. 147 (2): 87–92. doi:10.1159/000135694. PMID 18520152.
- ↑ Cheraghi T, Aghamohammadi A, Mirminachi B, Keihanian T, Hedayat E, Abolhassani H, Sagvand BT, Rezaei N (2014). "Prediction of the evolution of common variable immunodeficiency: HLA typing for patients with selective IgA deficiency". J Investig Allergol Clin Immunol. 24 (3): 198–200. PMID 25011360.
- ↑ Turner MW (October 1991). "Deficiency of mannan binding protein--a new complement deficiency syndrome". Clin. Exp. Immunol. 86 Suppl 1: 53–6. PMC 1554043. PMID 1934604.
- ↑ Aittoniemi J, Baer M, Soppi E, Vesikari T, Miettinen A (March 1998). "Mannan binding lectin deficiency and concomitant immunodefects". Arch. Dis. Child. 78 (3): 245–8. PMC 1717510. PMID 9613355.
- ↑ Aittoniemi J, Koskinen S, Laippala P, Laine S, Miettinen A (June 1999). "The significance of IgG subclasses and mannan-binding lectin (MBL) for susceptibility to infection in apparently healthy adults with IgA deficiency". Clin. Exp. Immunol. 116 (3): 505–8. PMC 1905297. PMID 10361242.
- ↑ Soheili H, Abolhassani H, Arandi N, Khazaei HA, Shahinpour S, Hirbod-Mobarakeh A, Rezaei N, Aghamohammadi A (2013). "Evaluation of natural regulatory T cells in subjects with selective IgA deficiency: from senior idea to novel opportunities". Int. Arch. Allergy Immunol. 160 (2): 208–14. doi:10.1159/000339867. PMID 23018812.
- ↑ 17.0 17.1 Ramsay AJ, Husband AJ, Ramshaw IA, Bao S, Matthaei KI, Koehler G, Kopf M (April 1994). "The role of interleukin-6 in mucosal IgA antibody responses in vivo". Science. 264 (5158): 561–3. PMID 8160012.
- ↑ Wang Z, Yunis D, Irigoyen M, Kitchens B, Bottaro A, Alt FW, Alper CA (June 1999). "Discordance between IgA switching at the DNA level and IgA expression at the mRNA level in IgA-deficient patients". Clin. Immunol. 91 (3): 263–70. doi:10.1006/clim.1999.4702. PMID 10370371.
- ↑ Conley ME, Cooper MD (August 1981). "Immature IgA B cells in IgA-deficient patients". N. Engl. J. Med. 305 (9): 495–7. doi:10.1056/NEJM198108273050905. PMID 6973088.
- ↑ Hammarström L, Lönnqvist B, Ringdén O, Smith CI, Wiebe T (April 1985). "Transfer of IgA deficiency to a bone-marrow-grafted patient with aplastic anaemia". Lancet. 1 (8432): 778–81. PMID 2858666.
- ↑ Borte S, Pan-Hammarström Q, Liu C, Sack U, Borte M, Wagner U, Graf D, Hammarström L (November 2009). "Interleukin-21 restores immunoglobulin production ex vivo in patients with common variable immunodeficiency and selective IgA deficiency". Blood. 114 (19): 4089–98. doi:10.1182/blood-2009-02-207423. PMID 19738033.
- ↑ Oen K, Petty RE, Schroeder ML (March 1982). "Immunoglobulin A deficiency: genetic studies". Tissue Antigens. 19 (3): 174–82. PMID 7089956.
- ↑ Hammarström L, Smith CI (January 1983). "HLA-A, B, C and DR antigens in immunoglobulin A deficiency". Tissue Antigens. 21 (1): 75–9. PMID 6601317.
- ↑ Ferreira RC, Pan-Hammarström Q, Graham RR, Gateva V, Fontán G, Lee AT, Ortmann W, Urcelay E, Fernández-Arquero M, Núñez C, Jorgensen G, Ludviksson BR, Koskinen S, Haimila K, Clark HF, Klareskog L, Gregersen PK, Behrens TW, Hammarström L (September 2010). "Association of IFIH1 and other autoimmunity risk alleles with selective IgA deficiency". Nat. Genet. 42 (9): 777–80. doi:10.1038/ng.644. PMID 20694011.
- ↑ MacHulla HK, Schönermarck U, Schaaf A, Müller LP, Kloss C, Krüger J, Kunze G, Schönermarck G, Langner J (August 2000). "HLA-A, B, Cw and DRB1, DRB3/4/5, DQB1, DPB1 frequencies in German immunoglobulin A-deficient individuals". Scand. J. Immunol. 52 (2): 207–11. PMID 10931389.
- ↑ Olerup O, Smith CI, Hammarström L (September 1990). "Different amino acids at position 57 of the HLA-DQ beta chain associated with susceptibility and resistance to IgA deficiency". Nature. 347 (6290): 289–90. doi:10.1038/347289a0. PMID 1976229.
- ↑ Schroeder HW, Zhu ZB, March RE, Campbell RD, Berney SM, Nedospasov SA, Turetskaya RL, Atkinson TP, Go RC, Cooper MD, Volanakis JE (February 1998). "Susceptibility locus for IgA deficiency and common variable immunodeficiency in the HLA-DR3, -B8, -A1 haplotypes". Mol. Med. 4 (2): 72–86. PMC 2230309. PMID 9508785.
- ↑ Reil A, Bein G, Machulla HK, Sternberg B, Seyfarth M (November 1997). "High-resolution DNA typing in immunoglobulin A deficiency confirms a positive association with DRB1*0301, DQB1*02 haplotypes". Tissue Antigens. 50 (5): 501–6. PMID 9389325.
- ↑ Volanakis JE, Zhu ZB, Schaffer FM, Macon KJ, Palermos J, Barger BO, Go R, Campbell RD, Schroeder HW, Cooper MD (June 1992). "Major histocompatibility complex class III genes and susceptibility to immunoglobulin A deficiency and common variable immunodeficiency". J. Clin. Invest. 89 (6): 1914–22. doi:10.1172/JCI115797. PMC 295891. PMID 1351062.
- ↑ Castigli E, Wilson SA, Garibyan L, Rachid R, Bonilla F, Schneider L, Geha RS (August 2005). "TACI is mutant in common variable immunodeficiency and IgA deficiency". Nat. Genet. 37 (8): 829–34. doi:10.1038/ng1601. PMID 16007086.
- ↑ 31.0 31.1 Salzer U, Chapel HM, Webster AD, Pan-Hammarström Q, Schmitt-Graeff A, Schlesier M, Peter HH, Rockstroh JK, Schneider P, Schäffer AA, Hammarström L, Grimbacher B (August 2005). "Mutations in TNFRSF13B encoding TACI are associated with common variable immunodeficiency in humans". Nat. Genet. 37 (8): 820–8. doi:10.1038/ng1600. PMID 16007087.
- ↑ Schroeder HW, Zhu ZB, March RE, Campbell RD, Berney SM, Nedospasov SA, Turetskaya RL, Atkinson TP, Go RC, Cooper MD, Volanakis JE (February 1998). "Susceptibility locus for IgA deficiency and common variable immunodeficiency in the HLA-DR3, -B8, -A1 haplotypes". Mol. Med. 4 (2): 72–86. PMC 2230309. PMID 9508785.
- ↑ Johnson ML, Keeton LG, Zhu ZB, Volanakis JE, Cooper MD, Schroeder HW (June 1997). "Age-related changes in serum immunoglobulins in patients with familial IgA deficiency and common variable immunodeficiency (CVID)". Clin. Exp. Immunol. 108 (3): 477–83. PMC 1904696. PMID 9182895.
- ↑ Ludvigsson JF, Neovius M, Hammarström L (May 2014). "Association between IgA deficiency & other autoimmune conditions: a population-based matched cohort study". J. Clin. Immunol. 34 (4): 444–51. doi:10.1007/s10875-014-0009-4. PMID 24584841.
- ↑ 35.0 35.1 Jacob CM, Pastorino AC, Fahl K, Carneiro-Sampaio M, Monteiro RC (May 2008). "Autoimmunity in IgA deficiency: revisiting the role of IgA as a silent housekeeper". J. Clin. Immunol. 28 Suppl 1: S56–61. doi:10.1007/s10875-007-9163-2. PMID 18202833.
- ↑ Wang N, Shen N, Vyse TJ, Anand V, Gunnarson I, Sturfelt G, Rantapää-Dahlqvist S, Elvin K, Truedsson L, Andersson BA, Dahle C, Ortqvist E, Gregersen PK, Behrens TW, Hammarström L (2011). "Selective IgA deficiency in autoimmune diseases". Mol. Med. 17 (11–12): 1383–96. doi:10.2119/molmed.2011.00195. PMC 3321806. PMID 21826374.
- ↑ Erkoçoğlu M, Civelek E, Kocabaş CN (October 2016). "Unusual presentation: Concurrent IgA deficiency and idiopathic pulmonary hemosiderosis". Pediatr. Pulmonol. 51 (10): E34–E36. doi:10.1002/ppul.23445. PMID 27120139.
- ↑ Staples ER, McDermott EM, Reiman A, Byrd PJ, Ritchie S, Taylor AM, Davies EG (August 2008). "Immunodeficiency in ataxia telangiectasia is correlated strongly with the presence of two null mutations in the ataxia telangiectasia mutated gene". Clin. Exp. Immunol. 153 (2): 214–20. doi:10.1111/j.1365-2249.2008.03684.x. PMC 2492895. PMID 18505428.
- ↑ Chopra C, Davies G, Taylor M, Anderson M, Bainbridge S, Tighe P, McDermott EM (May 2014). "Immune deficiency in Ataxia-Telangiectasia: a longitudinal study of 44 patients". Clin. Exp. Immunol. 176 (2): 275–82. doi:10.1111/cei.12262. PMC 3992040. PMID 24387201.
- ↑ Ludvigsson JF, Neovius M, Ye W, Hammarström L (February 2015). "IgA deficiency and risk of cancer: a population-based matched cohort study". J. Clin. Immunol. 35 (2): 182–8. doi:10.1007/s10875-014-0124-2. PMID 25589342.
- ↑ Shalapour S, Lin XJ, Bastian IN, Brain J, Burt AD, Aksenov AA, Vrbanac AF, Li W, Perkins A, Matsutani T, Zhong Z, Dhar D, Navas-Molina JA, Xu J, Loomba R, Downes M, Yu RT, Evans RM, Dorrestein PC, Knight R, Benner C, Anstee QM, Karin M (November 2017). "Inflammation-induced IgA+ cells dismantle anti-liver cancer immunity". Nature. 551 (7680): 340–345. doi:10.1038/nature24302. PMC 5884449. PMID 29144460.
- ↑ Agarwal S, Cunningham-Rundles C (September 2007). "Assessment and clinical interpretation of reduced IgG values". Ann. Allergy Asthma Immunol. 99 (3): 281–3. doi:10.1016/S1081-1206(10)60665-5. PMC 3099256. PMID 17910333.
- ↑ Korthäuer U, Graf D, Mages HW, Brière F, Padayachee M, Malcolm S, Ugazio AG, Notarangelo LD, Levinsky RJ, Kroczek RA (February 1993). "Defective expression of T-cell CD40 ligand causes X-linked immunodeficiency with hyper-IgM". Nature. 361 (6412): 539–41. doi:10.1038/361539a0. PMID 7679206.
- ↑ Levy J, Espanol-Boren T, Thomas C, Fischer A, Tovo P, Bordigoni P, Resnick I, Fasth A, Baer M, Gomez L, Sanders EA, Tabone MD, Plantaz D, Etzioni A, Monafo V, Abinun M, Hammarstrom L, Abrahamsen T, Jones A, Finn A, Klemola T, DeVries E, Sanal O, Peitsch MC, Notarangelo LD (July 1997). "Clinical spectrum of X-linked hyper-IgM syndrome". J. Pediatr. 131 (1 Pt 1): 47–54. PMID 9255191.
- ↑ Winkelstein JA, Marino MC, Ochs H, Fuleihan R, Scholl PR, Geha R, Stiehm ER, Conley ME (November 2003). "The X-linked hyper-IgM syndrome: clinical and immunologic features of 79 patients". Medicine (Baltimore). 82 (6): 373–84. doi:10.1097/01.md.0000100046.06009.b0. PMID 14663287.
- ↑ Subauste CS, Wessendarp M, Sorensen RU, Leiva LE (June 1999). "CD40-CD40 ligand interaction is central to cell-mediated immunity against Toxoplasma gondii: patients with hyper IgM syndrome have a defective type 1 immune response that can be restored by soluble CD40 ligand trimer". J. Immunol. 162 (11): 6690–700. PMID 10352287.
- ↑ Hayward AR, Levy J, Facchetti F, Notarangelo L, Ochs HD, Etzioni A, Bonnefoy JY, Cosyns M, Weinberg A (January 1997). "Cholangiopathy and tumors of the pancreas, liver, and biliary tree in boys with X-linked immunodeficiency with hyper-IgM". J. Immunol. 158 (2): 977–83. PMID 8993019.
- ↑ Davies EG, Thrasher AJ (April 2010). "Update on the hyper immunoglobulin M syndromes". Br. J. Haematol. 149 (2): 167–80. doi:10.1111/j.1365-2141.2010.08077.x. PMC 2855828. PMID 20180797.
- ↑ Suzuki H, Kaneko H, Fukao T, Jin R, Kawamoto N, Asano T, Matsui E, Kasahara K, Kondo N (March 2009). "Various expression patterns of alpha1 and alpha2 genes in IgA deficiency". Allergol Int. 58 (1): 111–7. doi:10.2332/allergolint.O-08-549. PMID 19153537.
- ↑ Edwards E, Razvi S, Cunningham-Rundles C (April 2004). "IgA deficiency: clinical correlates and responses to pneumococcal vaccine". Clin. Immunol. 111 (1): 93–7. doi:10.1016/j.clim.2003.12.005. PMID 15093556.
- ↑ Chipps BE, Talamo RC, Winkelstein JA (April 1978). "IgA deficiency, recurrent pneumonias, and bronchiectasis". Chest. 73 (4): 519–26. PMID 305332.
- ↑ Zinneman HH, Kaplan AP (September 1972). "The association of giardiasis with reduced intestinal secretory immunoglobulin A". Am J Dig Dis. 17 (9): 793–7. PMID 5056860.
- ↑ Aghamohammadi A, Cheraghi T, Gharagozlou M, Movahedi M, Rezaei N, Yeganeh M, Parvaneh N, Abolhassani H, Pourpak Z, Moin M (January 2009). "IgA deficiency: correlation between clinical and immunological phenotypes". J. Clin. Immunol. 29 (1): 130–6. doi:10.1007/s10875-008-9229-9. PMID 18683032.
- ↑ Janzi M, Kull I, Sjöberg R, Wan J, Melén E, Bayat N, Ostblom E, Pan-Hammarström Q, Nilsson P, Hammarström L (October 2009). "Selective IgA deficiency in early life: association to infections and allergic diseases during childhood". Clin. Immunol. 133 (1): 78–85. doi:10.1016/j.clim.2009.05.014. PMID 19541543.
- ↑ Conley ME, Notarangelo LD, Etzioni A (December 1999). "Diagnostic criteria for primary immunodeficiencies. Representing PAGID (Pan-American Group for Immunodeficiency) and ESID (European Society for Immunodeficiencies)". Clin. Immunol. 93 (3): 190–7. doi:10.1006/clim.1999.4799. PMID 10600329.
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- ↑ T. Zenone, P. J. Souquet, C. Cunningham-Rundles & J. P. Bernard (1996). "Hodgkin's disease associated with IgA and IgG subclass deficiency". Journal of internal medicine. 240 (2): 99–102. PMID 8810936. Unknown parameter
|month=
ignored (help) - ↑ W. B. Klaustermeyer, M. E. Gianos, M. L. Kurohara, H. T. Dao & D. C. Heiner (1992). "IgG subclass deficiency associated with corticosteroids in obstructive lung disease". Chest. 102 (4): 1137–1142. PMID 1343817. Unknown parameter
|month=
ignored (help) - ↑ I. Qvarfordt, G. C. Riise, B. A. Andersson & S. Larsson (2001). "IgG subclasses in smokers with chronic bronchitis and recurrent exacerbations". Thorax. 56 (6): 445–449. PMID 11359959. Unknown parameter
|month=
ignored (help) - ↑ Vorechovský I, Zetterquist H, Paganelli R, Koskinen S, Webster AD, Björkander J, Smith CI, Hammarström L (November 1995). "Family and linkage study of selective IgA deficiency and common variable immunodeficiency". Clin. Immunol. Immunopathol. 77 (2): 185–92. PMID 7586726.
- ↑ Picard C, Bobby Gaspar H, Al-Herz W, Bousfiha A, Casanova JL, Chatila T, Crow YJ, Cunningham-Rundles C, Etzioni A, Franco JL, Holland SM, Klein C, Morio T, Ochs HD, Oksenhendler E, Puck J, Tang M, Tangye SG, Torgerson TR, Sullivan KE (January 2018). "International Union of Immunological Societies: 2017 Primary Immunodeficiency Diseases Committee Report on Inborn Errors of Immunity". J. Clin. Immunol. 38 (1): 96–128. doi:10.1007/s10875-017-0464-9. PMC 5742601. PMID 29226302. Vancouver style error: initials (help)
- ↑ Vorechovský I, Webster AD, Plebani A, Hammarström L (April 1999). "Genetic linkage of IgA deficiency to the major histocompatibility complex: evidence for allele segregation distortion, parent-of-origin penetrance differences, and the role of anti-IgA antibodies in disease predisposition". Am. J. Hum. Genet. 64 (4): 1096–109. PMC 1377834. PMID 10090895.
- ↑ Karaca NE, Severcan EU, Bilgin BG, Azarsiz E, Akarcan S, Gunaydın NC, Gulez N, Genel F, Aksu G, Kutukculer N (2018). "Familial inheritance and screening of first-degree relatives in common variable immunodeficiency and immunoglobulin A deficiency patients". Int J Immunopathol Pharmacol. 32: 2058738418779458. doi:10.1177/2058738418779458. PMC 6073834. PMID 29978731.
- ↑ Nurkic J, Numanovic F, Arnautalic L, Tihic N, Halilovic D, Jahic M (December 2014). "Diagnostic significance of reduced IgA in children". Med Arch. 68 (6): 381–3. doi:10.5455/medarh.2014.68.381-383. PMC 4314178. PMID 25648982.
- ↑ Aytekin C, Tuygun N, Gokce S, Dogu F, Ikinciogullari A (October 2012). "Selective IgA deficiency: clinical and laboratory features of 118 children in Turkey". J. Clin. Immunol. 32 (5): 961–6. doi:10.1007/s10875-012-9702-3. PMID 22547079.
- ↑ Plebani A, Ugazio AG, Monafo V, Burgio GR (April 1986). "Clinical heterogeneity and reversibility of selective immunoglobulin A deficiency in 80 children". Lancet. 1 (8485): 829–31. PMID 2870316.
- ↑ Litzman J, Burianova M, Thon V, Lokaj J (1996). "Progression of selective IgA deficiency to common variable immunodeficiency in a 16 year old boy". Allergol Immunopathol (Madr). 24 (4): 174–6. PMID 8939274.
- ↑ Horn J, Thon V, Bartonkova D, Salzer U, Warnatz K, Schlesier M, Peter HH, Grimbacher B (February 2007). "Anti-IgA antibodies in common variable immunodeficiency (CVID): diagnostic workup and therapeutic strategy". Clin. Immunol. 122 (2): 156–62. doi:10.1016/j.clim.2006.10.002. PMID 17137841.
- ↑ Burks AW, Sampson HA, Buckley RH (February 1986). "Anaphylactic reactions after gamma globulin administration in patients with hypogammaglobulinemia. Detection of IgE antibodies to IgA". N. Engl. J. Med. 314 (9): 560–4. doi:10.1056/NEJM198602273140907. PMID 3945295.
- ↑ Freeman AF, Holland SM (December 2009). "Antimicrobial prophylaxis for primary immunodeficiencies". Curr Opin Allergy Clin Immunol. 9 (6): 525–30. doi:10.1097/ACI.0b013e328332be33. PMID 19812481.