Abstract:
:The objective of this study was to assess the clinical and histopathological relationship between pulmonary fibrosis and type 1 diabetes. We examined clinical pulmonary function parameters and transbronchial lung biopsies to assess associated histopathological changes in 12 type 1 diabetic patients presenting with dyspnea. Lung CT images pulmonary function tests from 12 diabetic patients without dyspnea and from 12 matched normal subjects served as controls. A similar histopathological analysis, including cytokine levels and pro-fibrotic markers, was performed on lung tissues in mice after the induction of experimental diabetes in an attempt to strengthen the link between diabetes and pulmonary fibrosis. Pulmonary function parameters (FVC, FEV1, TLC, and DLco/VA) were significantly reduced in diabetic patients with dyspnea and without dyspnea, compared to controls. Both patient groups also had increased lung CT scores and symptoms compared to normal controls, though the greatest increases were in the diabetic patients with dyspnea. Chronic hyperglycemia induced in mice led to histopathological changes in the lungs that were similar to those found in the human diabetic subjects and included alveoli compression by hyperplastic interstitium infiltrated with inflammatory cells and fibrotic in nature. Two inflammatory related genes, TNF-α and PAI-1, and two fibrosis-related genes, CTGF and fibronectin, demonstrated increased mRNA and protein expression in diabetic mouse lungs. In conclusion, there were significant clinical and histopathological correlations between pulmonary fibrosis and the presence of type 1 diabetes. Diabetes was clinically associated with pulmonary fibrosis and dysfunction in humans, and diabetes induction led to a similar pulmonary fibrosis in an experimental model. These clinical and non-clinical data suggest that diabetes is an independent risk factor for pulmonary fibrosis.
journal_name
Cell Biochem Biophysjournal_title
Cell biochemistry and biophysicsauthors
Hu Y,Ma Z,Guo Z,Zhao F,Wang Y,Cai L,Yang Jdoi
10.1007/s12013-014-0068-4subject
Has Abstractpub_date
2014-11-01 00:00:00pages
1385-91issue
2eissn
1085-9195issn
1559-0283journal_volume
70pub_type
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