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Cyclosporine induced myocardial fibrosis: a unique controlled case report
Insights
Cyclosporine can cause perimyocytic fibrosis in transplanted hearts, even without rejection. This drug-induced fibrosis was not observed in the patient's native heart, suggesting it affects only the transplanted organ.
Area of Science:
- Cardiology
- Immunosuppression Research
- Transplantation Medicine
Background:
- Cyclosporine is a common immunosuppressant used in organ transplantation.
- Perimyocytic fibrosis has been observed in donor hearts of patients treated with cyclosporine.
- The effect of cyclosporine on non-transplanted hearts is not well understood.
Observation:
- A patient with a heterotopic heart transplant was monitored via serial endomyocardial biopsies of both native and donor hearts.
- The donor heart showed significant perimyocytic fibrosis.
- The native heart did not exhibit any signs of fibrosis.
Findings:
- Cyclosporine-induced perimyocytic fibrosis appears to be specific to the transplanted heart.
- Fibrosis occurred in the absence of any rejection episodes.
- No restrictive hemodynamic effects were noted up to three years post-transplant.
Implications:
- Cyclosporine's fibrotic effects may be limited to allografted organs.
- Further research is needed to understand the mechanisms of cyclosporine-induced fibrosis in transplanted hearts.
- This finding is relevant for the use of cyclosporine in both cardiac and non-cardiac organ transplantation.
Abstract:
Many patients treated with cyclosporine in the Stanford Heart Transplant Program have exhibited perimyocytic fibrosis in the donor heart, seen on endomyocardial biopsy specimen. Although restrictive hemodynamic effects have not been observed up to three years after transplantation, there is a possibility that such changes could become a problem. With the increasing use of cyclosporine in non-cardiac organ transplantation, it is of interest to examine the effect of this drug upon the non transplanted heart. This was possible in a man who underwent a heterotopic heart transplantation 3 1/2 years ago, and who has been followed with serial endomyocardial biopsies from both hearts. Although there were no episodes of rejection the donor heart developed significant perimyocytic fibrosis which was not seen in the native heart. This study suggests that cyclosporine induced fibrosis only occurs in the transplanted heart.