[The importance of immunogenetic studies in Itsenko-Cushing disease combined with other endocrine diseases]

Area of Science:

• Endocrinology
• Immunogenetics
• Human Genetics

Background:

• Itsenko-Cushing disease (ICD) affects endocrine function.
• Comorbidities in ICD patients can complicate diagnosis and pathogenesis understanding.
• Human Leukocyte Antigen (HLA) associations are studied in autoimmune and endocrine disorders.

Purpose of the Study:

• To investigate clinical and laboratory signs of associated endocrine diseases in Itsenko-Cushing disease patients.
• To identify specific Human Leukocyte Antigen (HLA) associations in different patient groups.
• To propose a method for distinguishing specific and nonspecific HLA associations in ICD.

Main Methods:

• Clinical and laboratory examination of 97 Itsenko-Cushing disease patients.
• Stratification of patients into two groups: those without concomitant endocrine diseases and those with associated endocrine diseases.
• Human Leukocyte Antigen (HLA) typing and association analysis, including a proposed method for specificity estimation.

Main Results:

• Two groups were identified: Group 1 (no comorbidities) with equal gender distribution and a predominance of HLA-DR7. Group 2 (with comorbidities) showed a female predominance and a higher incidence of HLA-DR5.
• A specific association of HLA-DR7 with Itsenko-Cushing disease was identified.
• Unspecific associations were noted for HLA-B8 and HLA-DR5.
• A specific polyendocrine autoimmune syndrome associated with Itsenko-Cushing disease was revealed.

Conclusions:

• The study distinguishes specific (DR7) and unspecific (B8, DR5) HLA associations in Itsenko-Cushing disease.
• A specific polyendocrine autoimmune syndrome linked to Itsenko-Cushing disease suggests a shared or related pathogenesis.
• Findings advance the understanding of Itsenko-Cushing disease pathogenesis and highlight the role of HLA in associated autoimmune conditions.