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Nitric oxide is not involved in Neisseria gonorrhoeae-induced cellular damage of human fallopian tubes in vitro

Garcia, Katherine, Rubilar, Paulina S., Vargas, Macarena F., Cardenas, Hugo, Rios, Miguel A., Orihuela, Pedro A., Vargas, Renato H., Fuhrer, Juan, Heckels, John E., Christodoulides, Myron and Velasquez, Luis A. (2010) Nitric oxide is not involved in Neisseria gonorrhoeae-induced cellular damage of human fallopian tubes in vitro Biological Research, 43, pp. 39-50. (doi:10.4067/S0716-97602010000100006).

Record type: Article


In the present study, we investigated whether cellular damage, as demonstrated by lactate dehydrogenase
(LDH) release in the human fallopian tube (FT) infected by Neisseria gonorrhoeae (Ngo), correlated with
high levels of nitric oxide synthase (NOS) mRNA and enzyme activity. Infection with Ngo induced a
significant increase (~35-fold) in mRNA transcripts of the inducible isoform of NOS.

Paradoxically, a reduction in NOS enzyme activity was observed in infected cultures, suggesting that gonococcal infection possibly influences translation of iNOS mRNA to the enzyme. In addition, treatment with the NOS inhibitor
TRIM did not prevent gonococcal-induced cellular damage. In contrast, the addition of the inhibitor L-NAME induced a 40% reduction in LDH release, which correlated with a ~50% reduction in gonococcal numbers.

Moreover, treatment of normal FT explants with an exogenous NO donor, SNAP, did not induce significant
cellular damage. Taken together, our data suggest that NO does not contribute to cellular damage during
infection of the human FT with Neisseria gonorrhoeae.

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Published date: 2010
Keywords: cellular damage, fallopian tubes, neisseria gonorrhoeae, nitric oxide


Local EPrints ID: 160441
ISSN: 0716-9760
PURE UUID: b52f627d-d80c-4019-836e-f587e2fa163a

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Date deposited: 14 Jul 2010 12:58
Last modified: 18 Jul 2017 12:35

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Author: Katherine Garcia
Author: Paulina S. Rubilar
Author: Macarena F. Vargas
Author: Hugo Cardenas
Author: Miguel A. Rios
Author: Pedro A. Orihuela
Author: Renato H. Vargas
Author: Juan Fuhrer
Author: John E. Heckels
Author: Luis A. Velasquez

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