Lifestyle
- Manage stress through relaxation techniques
- Regular moderate exercise
- Adequate sleep
Immunoglobulin A · IgA · Salivary IgA
IgA measures the concentration of immunoglobulin A, an antibody that plays a crucial role in mucosal immunity.
Reference ranges can vary based on age and laboratory methods. No significant sex-specific differences.
Immunoglobulin A (IgA) is a critical component of the immune system, primarily found in mucosal areas such as the gut, respiratory tract, and urogenital tract, as well as in saliva, tears, and breast milk. It plays a key role in mucosal immunity by preventing pathogen adherence to epithelial cells and neutralizing toxins. Researchers have observed that IgA is involved in the first line of defense against infections, particularly those affecting mucosal surfaces. Clinically, IgA is significant in diagnosing and monitoring conditions like IgA nephropathy, an autoimmune kidney disease characterized by IgA deposition in the glomeruli, leading to kidney damage. Elevated IgA levels can indicate autoimmune activity or chronic infections, while low levels may suggest immunodeficiency. In the context of athletic performance and biohacking, IgA levels can reflect immune system robustness, with implications for recovery and susceptibility to infections. However, researchers have found that factors such as stress, nutritional status, and circadian rhythms can influence IgA levels. For instance, salivary IgA can decrease under acute stress, as seen in studies involving L-Theanine, which modulates stress responses. Therefore, when interpreting IgA levels, it is crucial to consider potential confounders such as recent infections, stress, and time of day, as these can affect the results.
Klinische Bedeutung
Elevated IgA levels may indicate autoimmune diseases like IgA nephropathy or chronic infections. Reduced levels can suggest immunodeficiency or increased susceptibility to infections.
Progressively rising IgA levels may suggest worsening autoimmune activity or chronic infection. Re-test in 4-6 weeks to confirm trends.
Falling IgA levels could indicate improvement in autoimmune conditions or resolution of infections.
Re-test Interval
4 weeks if outside optimal range
Note:
Consult a healthcare provider before starting any supplements, especially if you have underlying health conditions.
IgA levels can vary throughout the day; morning samples may provide more consistent results.
Testing Frequency
Annually for general health monitoring, more frequently if monitoring specific conditions.
May affect
Current research suggests that reference ranges and optimal targets for immunoglobulin A (IgA) in various clinical contexts, such as IgA nephropathy and SARS-CoV-2 infection, remain inadequately defined. Researchers have not yet established the impact of confounders like age, sex, and ethnicity on IgA levels and their clinical implications. Additionally, unanswered clinical questions include the predictive value of IgA levels for treatment responses in IgAN and the role of IgA in long-term immunity against respiratory viruses.
1,113
Total Citations
11
Human/RCT
8.7
Avg. Influence
2025
Latest
Researchers found that L-Theanine, an amino acid from green tea, reduced heart rate and salivary immunoglobulin A (s-IgA) responses during stress tasks. This suggests that L-Theanine may help mitigate physiological stress responses. The study indicates that L-Theanine could influence sympathetic nervous system activity.
Researchers examined immunoglobulin A nephropathy (IgAN), the most common primary glomerulonephritis, which can lead to chronic kidney disease in up to 40% of patients. They found significant variability in disease progression and outcomes across different populations, and noted that current diagnostic methods rely on kidney biopsy due to the lack of specific biomarkers. The study highlights ongoing research into the disease's pathophysiology and potential new treatments.
Researchers identified that gut microbiota-specific IgA+ B cells can traffic to the central nervous system (CNS) in multiple sclerosis (MS). The study found a strong IgA enrichment in active MS, suggesting a role for IgA in neuroinflammation. This highlights the potential of IgA as a biomarker for MS.
This study reviewed immunoglobulin A (IgA) deficiency, the most common primary immunodeficiency, noting its prevalence and associated health issues. Researchers found that while many individuals are asymptomatic, those with symptoms often experience severe infections. The study highlights the need for careful management of IgA deficiency, particularly in relation to autoimmune diseases.
In a clinical trial, researchers observed that telitacicept significantly reduced levels of galactose-deficient IgA1 and IgA-containing immune complexes in patients with immunoglobulin A nephropathy (IgAN). The study found these reductions were associated with decreased proteinuria, indicating a potential biomarker for treatment response. The findings support the need for further investigation into serum biomarkers for predicting clinical outcomes.
Researchers explored the presence of immunoglobulin A antibodies against myelin oligodendrocyte glycoprotein (MOG) in patients with central nervous system demyelination. They found isolated MOG-IgA in a subgroup of patients, suggesting it may serve as a novel diagnostic biomarker. The study indicates that MOG-IgA could be relevant in understanding the pathogenesis of demyelinating diseases.
Researchers explored the role of microscopic hematuria as a potential risk factor for progression in immunoglobulin A nephropathy (IgAN). The study discussed the challenges in standardizing hematuria assessments and called for its inclusion in clinical decision-making to guide treatment strategies in IgAN.
This study reported two cases of immunoglobulin A vasculitis following COVID-19 vaccination, highlighting the potential for vaccines to trigger such conditions. Researchers observed symptoms including purpura and arthritis, with laboratory findings indicating mild inflammation. The cases suggest a need for awareness of vaccine-related adverse effects, although a coincidence cannot be ruled out.
Researchers reviewed the role of immunoglobulin A (IgA) in response to SARS-CoV-2 infection, emphasizing its importance as a mucosal antibody in the respiratory tract. They found that IgA could serve as a diagnostic and prognostic marker for COVID-19, highlighting its potential in early detection strategies. The study suggests that targeting IgA in vaccines may enhance mucosal immunity against respiratory viruses.
Researchers investigated post-transplant immunoglobulin A (IgA) deposition in kidney allografts, noting its association with allograft loss. They found that latent mesangial IgA deposition could be detected through biopsy, but the clinical significance and treatment strategies remain unclear. The study emphasizes the need for non-invasive biomarkers to predict the progression of asymptomatic IgA deposition.
Research publications about Immunglobulin A over time
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