# Beta-2 Glycoprotein I IgA Isotype: An Important Consideration in Secondary Hypertension

## TL;DR

This paper discusses a case where IgA antibodies against beta-2 glycoprotein I were linked to a hypertensive emergency, suggesting their potential role in antiphospholipid syndrome.

## Contribution

The paper highlights the clinical relevance of IgA anti-beta-2 glycoprotein I antibodies, which are not currently part of standard diagnostic criteria for antiphospholipid syndrome.

## Key findings

- A patient with hypertensive emergency had IgA anti-beta-2 glycoprotein I antibodies detected.
- IgA isotype may be clinically significant in antiphospholipid syndrome despite not being part of current diagnostic criteria.

## Abstract

Anti-beta-2 glycoprotein I antibodies are an important player in hypercoagulable states, including those that lead to antiphospholipid syndrome. Traditionally, assays have only detected IgG and IgM isotypes of this antibody. However, newer assays also detect the IgA isotype. The problem lies in the largely unknown significance of this IgA isotype. This paper describes a middle-aged male who presented with hypertensive emergency and was later found to have IgA anti-beta-2 glycoprotein I antibodies. He was treated with multiple anti-hypertensives, aspirin, and statin therapy. In addition to the case, we discuss the implications of this IgA isotype and how it may relate to antiphospholipid syndrome, despite not currently being included in the laboratory diagnostic criteria for the disease.