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[Inhibitory effect of interferon on expression of oncogene in over-proliferative smooth muscle cell]
Abstract:
The model of balloon angioplasty (BA) was founded in rabbit abdominal aorta. In situ hybridization was used with the probes of oncogenes c-fos, c-myc and N-ras labeled by digoxin in vessel segments after BA and with the probes of oncogenes c-fos, c-myc, and N-ras labeled by biotin in smooth muscle cell (SMC) irritated by cultured medium of vessel segments after BA. Overexpression of c-fos, c-myc and N-ras oncogenes occurred in vessel segments after BA mainly in atherosclerotic plaques. There was expression of oncogene in normal vessel segments. Overexpression appeared in the over-proliferative SMC irritated by cultured medium of vessel segments after BA. A expression of N-ras occurred on the membrane of cellular nucleus. There was no expression of oncogenes in the normal SMC of control group. Overexpression could be partly inhibited by interferon-gamma.
Insights
Balloon angioplasty (BA) triggers overexpression of c-fos, c-myc, and N-ras oncogenes in rabbit aorta smooth muscle cells (SMCs). Interferon-gamma partially inhibited this oncogene overexpression.
Area of Science:
- Vascular biology
- Oncogene research
- Regenerative medicine
Context:
- Balloon angioplasty (BA) is a common procedure to treat atherosclerotic stenosis.
- Understanding the molecular mechanisms underlying vascular remodeling post-BA is crucial.
Purpose:
- To investigate the expression of c-fos, c-myc, and N-ras oncogenes in vascular segments and smooth muscle cells (SMCs) following balloon angioplasty in a rabbit model.
- To explore the potential inhibitory effect of interferon-gamma on oncogene overexpression.
Summary:
- Balloon angioplasty induced overexpression of c-fos, c-myc, and N-ras oncogenes in rabbit abdominal aorta, particularly in atherosclerotic plaques and in vitro-cultured SMCs exposed to post-BA vessel segments.
- While normal vessel segments showed some oncogene expression, overexpression was prominent in the BA model.
- N-ras expression was observed on the cellular nucleus membrane of irritated SMCs.
- Interferon-gamma demonstrated a partial inhibitory effect on the observed oncogene overexpression.
Impact:
- This study provides insights into the molecular changes in vascular cells after balloon angioplasty, highlighting the role of specific oncogenes.
- Findings suggest potential therapeutic targets for managing post-angioplasty vascular remodeling and hyperplasia.
- The partial inhibition by interferon-gamma warrants further investigation for its clinical applicability.