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Biomedical subjects

J B Klein

Publications and source records attributed to J B Klein.

63 records · Page 4Linked to original sources

A successful cardiac transplantation program using combined university and community resources.

From August 1984 to August 1986, 75 patients with end-stage heart disease and cardiac failure were evaluated. Twenty-five patients received orthotopic cardiac transplants from donors as far away as 1300 miles with an ischemic time of less than 4 hours. Seventeen of 25 patients are alive 3-24 months after transplantation. Evidence of rejection was seen in each patient. Twelve patients had mild, easily controlled rejection; 13 patients had severe rejection averaging 3.1 episodes per patient. The initial immunosuppressive regimen included cyclosporine and prednisone. To decrease complications related to high dose steroids, azathioprine has recently been added to our maintenance regimen to lessen steroid requirements. Acute rejection episodes were treated with 500-1000 mg of methylprednisolone for 3 days; antithymocyte globulin or the murine monoclonal antibody, OKT3, was added for severe or resistant rejection episodes. Three patients died of rejection, and two patients died of infection. Seventeen of 18 survivors are New York Heart Association (NYHA) Class I; 15 patients have returned to employment or full activity. Because of new developments in support of transplant candidates and treatment of complications, as well as the introduction of cyclosporine, orthotopic cardiac transplantation has become an effective treatment for end-stage heart disease.

Costs and Cost Analysis↗

The effects of interferon-alpha/beta in a model of rat heart transplantation.

Interferons have multiple immunologic effects. One such effect is the activation of expression of cell surface antigens. Interferon alpha/beta enhance expression of class I but not class II histocompatibility antigens. Contradictory information has been published regarding the effect of interferon-alpha/beta administration in patients with kidney transplantation. In a model of rat heart transplantation we demonstrated that administration of interferon-alpha/beta accelerated rejection in a dose-dependent fashion in the absence of maintenance cyclosporine. Animals treated with maintenance cyclosporine had evidence of increased rejection at 20 days that was resolved completely at 45 days with cyclosporine alone.

Animals↗