Related Experiment Videos
Natural killer cells in dilated cardiomyopathy
1First Department of Internal Medicine, Niigata University School of Medicine, Japan.
The Tohoku Journal of Experimental Medicine
|April 1, 1988
Summary
Natural killer (NK) cell activity is reduced in patients with dilated cardiomyopathy, particularly in milder cases. This suggests a link between impaired NK cell function and the development of this heart condition.
Area of Science:
- Immunology
- Cardiology
- Cellular Biology
Background:
- Dilated cardiomyopathy (DCM) is linked to immune system dysfunction.
- Reduced suppressor T cell and natural killer (NK) cell activity suggest immune involvement in DCM pathogenesis.
Purpose of the Study:
- To investigate NK cell subsets and activity in DCM patients.
- To correlate NK cell findings with clinical disease progression.
Main Methods:
- Assayed peripheral blood NK cell subsets (Leu 7, Leu 11, Leu 15, Leu 2a) and activity in 44 DCM patients.
- Compared results with healthy individuals and clinical course.
- Utilized interleukin-2 (IL-2) and gallium-67 (Ga-67) myocardial scintigraphy.
Main Results:
- DCM patients showed increased Leu 7 and Leu 11 positive cells compared to controls.
- NK cell activity was decreased in all DCM patients, most notably in mild cases.
- IL-2 did not restore NK cell activity.
- Severe DCM cases had more males and shorter clinical courses.
- Four mild DCM patients showed Ga-67 myocardial accumulation.
Conclusions:
- Impaired NK cell function is associated with DCM, especially milder forms.
- Chronic myocarditis pathophysiology may involve NK cell dysfunction in DCM.
- NK cell inhibition could play a role in the development of mild DCM.