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Infect Immun. 1987 September; 55(9): 2110-2116

Stimulation of bone resorption by inflamed nasal mucosa, dermonecrotic toxin-containing conditioned medium from Pasteurella multocida, and purified dermonecrotic toxin from P. multocida.

T G Kimman, C W Löwik, L J van de Wee-Pals, C W Thesingh, P Defize, E M Kamp and O L Bijvoet

ABSTRACT

The effects of inflamed nasal mucosa from pigs with atrophic rhinitis (AR), cell extract from Bordetella bronchiseptica, conditioned medium from Pasteurella multocida, and purified dermonecrotic toxin (DNT) from P. multocida on mouse fetal long bones in organ culture were studied. Inflamed nasal "AR mucosa" stimulated the release of 45Ca from prelabeled cultures, while histologically the formation of calcified matrix was impaired as well. B. bronchiseptica cell extract only transiently increased 45Ca release, but also impaired the formation of matrix. 45Ca release was also stimulated by DNT-containing conditioned medium from P. multocida and by purified DNT. The effect of DNT was biphasic: low doses (1 to 25 ng/ml) slightly stimulated bone resorption, higher doses were inhibitory. The stimulatory action of DNT on 45Ca release was accompanied by an increase in numbers of preosteoclasts and osteoclasts. The significance of these findings for the pathogenesis of AR is discussed.

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Infect Immun. 1987 September; 55(9): 2110-2116

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