About this trial
The AYLo study (AutoimmunitY and Loss of y - Investigating the Role of Hematopoietic Mutations and Mosaic Mutation in the Y Chromosome in Autoimmune Rheumatologic Diseases) aims to systematically investigate hematopoietic mutations, such as hematopoietic (mosaic) loss of the Y chromosome (mLOY), focusing on their underlying causes, pathophysiological significance, patterns of manifestation, and impact on disease progression in autoimmune, rheumatologic disorders. This research seeks to bridge existing knowledge gaps by exploring how such mutations influence immune homeostasis, cellular function, and susceptibility to inflammation-driven pathologies.
Through the integration of advanced immunological profiling, the study aspires to uncover key mechanisms that drive the initiation, progression, and complications of autoimmune rheumatic diseases. These analyses will combine single nucleotide polymorphisms (SNP) arrays, multiplex assays, transcriptomics, and flow cytometry staining of peripheral blood mononuclear cells to delineate the interplay between hematopoietic mutations and immune dysregulation.
A further objective is the development of a multimodal framework for disease-specific characterization, enabling precise mapping of mutation-driven phenotypes across diverse autoimmune conditions. This framework will incorporate clinical, molecular, and imaging data.
Additionally, the AYLo study aims to explore the potential role of mLOY and other hematopoietic mutations as biomarkers for disease stratification, prognosis, and therapeutic response. The findings may open avenues for personalized treatment approaches, leveraging the molecular insights to inform targeted interventions and improve patient outcomes in autoimmune rheumatic disorders.
By integrating translational and basic science approaches, this study has the potential to redefine current paradigms in autoimmune disease research and therapy.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Male
> 50 years
Diagnosis of arthritis (RA, PsA), collagen diseases (SLE, systemic sclerosis, Sjögren's syndrome, mixed connective tissue diseases), vasculitis (eGPA, GPA, MPA, IgG4-related disease, GCA, PMR), sarcoidosis, COPD, ILD or asthma bronchiale confirmed by the treating physician.
Disqualifiers
Female
< 50 years
Male
> 50 years
Trial population
The study population includes male participants aged 50 years or older, divided into two groups: individuals with specific medical conditions (cases) and healthy controls. 1. Participants must have a diagnosis confirmed by the treating physician of one or more of the following conditions: Arthritis (RA, PsA), CTD (e.g., systemic lupus erythematosus \[SLE\], systemic sclerosis, Sjögren's syndrome, mixed connective tissue diseases), vasculitis ( eosinophilic granulomatosis with polyangiitis \[eGPA\], granulomatosis with polyangiitis \[GPA\], microscopic polyangiitis \[MPA\], IgG4-related disease, GCA + PMR), sarcoidosis, COPD, ILD, asthma bronchial 2. Healthy Controls: Healthy male participants aged 50 years or older without any of the following conditions: Autoimmune or rheumatological diseases Pulmonary preconditions 3. Exclusion Criteria: For both groups, females and individuals younger than 50 years are excluded.
Trial design
Case-control
Prospective
Treatments tested in this trial
Single nucleotide polymorphisms (SNP)
Diagnostic testUtilizing single nucleotide polymorphisms (SNP) genotyping mosaic loss of y (mLOY) of individual patient will be assessed.
3'mRNA sequencing
Diagnostic test3'mRNA sequencing analyzes gene expression profiles related to the immune response in different study cohorts, aiding in understanding the genetic underpinnings of inflammation and its association with mLOY.
Enzyme-linked immunosorbent assay (ELISA) and Legendplex Array
Diagnostic testUsed to measure cytokine levels in the serum of investigated patients, aiding in profiling inflammatory markers that are indicative of disease activity, response to treatment and consequence of mLOY..
Flow Cytometry
Diagnostic testEmployed to analyze immune cell phenotypes in investigated cohorts. This test helps identify various immune cell subsets and their activation states, which are critical for understanding disease mechanisms and its association with mLOY.
Laboratory assessment
Diagnostic testSerum Chemistry
Assessment of Pulmonary Involvement
Diagnostic testResults of routine clinical assessment of pulmonary involvement (such as lung ultrasound, computed tomography, chest x-ray, whole-body plethysmography) will be compared to mLOY, ELISA/ Legendplex/ flow cytometry/ transcriptome analysis results.
Treatment groups
13
Treatment groupsSee each treatment group below.
Trial outcomes
Primary outcomes
Quantification of the fraction of hematopoietic cells exhibiting mLOY.
Detection and quantification of the fraction of hematopoietic cells exhibiting mLOY in peripheral blood using SNP. Unit of Measure: Percentage (%).
Secondary outcomes
Changes in Immune Cell Phenotype
Identification and quantification of immune cell subtypes, using flow cytometry. Unit of Measure: Changes in levels (percentages).
Changes in Cytokine Profiles
Identification and quantification of cytokines using 3'-mRNA transcriptome analysis and ELISA/ Legendplex. Unit of Measure: Changes in levels (pg/mL)
Number of Participants with Detected Pulmonary Involvement
Detection of structural anomalies in the lung in clinical routine assessment using lung ultrasound, computed tomography, chest radiography and whole-body plethysmography. Unit of Measure: Number of participants.
Sponsors and contacts
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University of Bonn
Lead sponsor
University Hospital, Bonn
Sponsor institution