Volume 150, Issue 3 pp. 451-459

Systemic and local interferon-gamma production following Mycobacterium ulcerans infection

H. S. Schipper

H. S. Schipper

Departments of Internal Medicine,

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B. Rutgers

B. Rutgers

Pathology and

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M. G. Huitema

M. G. Huitema

Immunology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands, and

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S. N. Etuaful

S. N. Etuaful

St Martin's Catholic Hospital, Agroyesum, Ghana

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B. D. Westenbrink

B. D. Westenbrink

Departments of Internal Medicine,

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P. C. Limburg

P. C. Limburg

Immunology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands, and

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W. TimensT. S. Van Der Werf

Corresponding Author

T. S. Van Der Werf

Departments of Internal Medicine,

T. S. van der Werf, Infectious diseases Service and Tuberculosis Unit, University Medical Center Groningen, University of Groningen, PO Box 30 001, 9700 RB Groningen, the Netherlands.
E-mail: [email protected]Search for more papers by this author
First published: 27 September 2007
Citations: 19

Summary

Buruli ulcer disease (BUD) is an emerging predominantly tropical disease caused by Mycobacterium ulcerans. The initial pre-ulcerative skin lesion often breaks down into an ulcer with undermined edges. Healing is common but may require considerable time, and scarring often results in functional limitations. Considerable evidence has now emerged that patients with early BUD cannot mount a sufficient protective T helper 1 (Th1) cell response to M. ulcerans, but uncertainty remains as to whether immune protection is restored over time. This study investigates the Th1 cell response of patients with various stages of BUD on mycobacterial antigens. We measured interferon (IFN)-γ levels after ex vivo whole blood stimulation with tuberculin purified protein derivative (PPD), and compared the Th1 cell response of individuals with pre-ulcerative, ulcerative and healed BUD as well as healthy controls. Moreover, the systemic Th1 cell response was related to histopathological features in the various stages of surgically resected BUD lesions. We show that patients with ulcerative and healed BUD produce significantly higher IFN-γ levels after mycobacterial ex vivo whole blood stimulation than healthy controls, and that patients with a granulomatous tissue response produce higher IFN-γ levels than individuals without. We therefore suggest that the mounted Th1 cell response in ulcerative BUD patients might be related to their histopathological tissue response.

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