Protein profiling in systemic sclerosis patients with different pulmonary complications using proteomic antibody...

Area of Science:

• Biomarker discovery
• Proteomics
• Systemic sclerosis research

Background:

• Pulmonary arterial hypertension (PAH) and interstitial lung disease (ILD) are major causes of mortality in systemic sclerosis (SSc).
• Early detection of mild SSc pulmonary complications is crucial for improving patient prognosis.

Purpose of the Study:

• To identify novel serum biomarkers for the early detection of SSc-related pulmonary complications.
• To evaluate the potential of identified biomarkers in distinguishing SSc with PAH and ILD.

Main Methods:

• Utilized a proteomic antibody microarray to screen 1000 serum proteins.
• Verified differentially expressed proteins using ELISA.
• Correlated biomarker levels with clinical data from SSc patients.

Main Results:

• Identified 125 differentially expressed proteins; calcitonin, sclerostin (SOST), CD40, and fibronectin were selected for verification.
• Elevated serum calcitonin and SOST levels were observed across SSc pulmonary complication subgroups.
• Serum calcitonin levels were higher in SSc with PAH, while SOST levels correlated with ILD and other organ involvement.

Conclusions:

• Serum calcitonin and SOST are potential biomarkers for SSc-related PAH and ILD, respectively.
• Further research is required to validate these findings and elucidate underlying mechanisms.