Korean J Parasitol.  2015 Oct;53(5):597-603. 10.3347/kjp.2015.53.5.597.

Activation of MAPK Is Required for ROS Generation and Exocytosis in HMC-1 Cells Induced by Trichomonas vaginalis-Derived Secretory Products

• Narantsogt G
• Min A
• Nam YH
• Lee YA
• Kim KA
• Agvaandaram G
• Dorjsuren
• El-Benna J
• Shin MH

• KMID: 2381782
• DOI: http://doi.org/10.3347/kjp.2015.53.5.597

Abstract

Trichomonas vaginalis is a flagellated protozoan parasite that causes vaginitis and cervicitis in women and asymptomatic urethritis and prostatitis in men. Mast cells have been reported to be predominant in vaginal smears and vaginal walls of patients infected with T. vaginalis. Mitogen-activated protein kinase (MAPK), activated by various stimuli, have been shown to regulate the transcriptional activity of various cytokine genes in mast cells. In this study, we investigated whether MAPK is involved in ROS generation and exocytotic degranulation in HMC-1 cells induced by T. vaginalis-derived secretory products (TvSP). We found that TvSP induces the activation of MAPK and NADPH oxidase in HMC-1 cells. Stimulation with TvSP induced phosphorylation of MAPK and p47phox in HMC-1 cells. Stimulation with TvSP also induced up-regulation of CD63, a marker for exocytosis, along the surfaces of human mast cells. Pretreatment with MAPK inhibitors strongly inhibited TvSP-induced ROS generation and exocytotic degranulation. Finally, our results suggest that TvSP induces intracellular ROS generation and exocytotic degranulation in HMC-1 via MAPK signaling.

Keyword

Trichomonas vaginalis; secretory product; mast cell; MAPK; ROS generation; exocytotic degranulation

MeSH Terms

Cell Degranulation
Cell Line
*Exocytosis
Humans
Mast Cells/*drug effects/*metabolism
Mitogen-Activated Protein Kinases/*metabolism
Reactive Oxygen Species/*metabolism
Trichomonas vaginalis/*metabolism
Virulence Factors/*metabolism
Mitogen-Activated Protein Kinases
Reactive Oxygen Species
Virulence Factors