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Mee Sun Ock 10 Articles
Identification of the transcriptome profile of Miamiensis avidus after mebendazole treatment
Hyunsu Kim, A-Reum Lee, Kyung-Yoon Jeon, Eun-Ji Ko, Hee-Jae Cha, Mee Sun Ock
Kosin Med J. 2022;37(3):203-212.   Published online May 16, 2022
DOI: https://doi.org/10.7180/kmj.22.003
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Abstract PDFPubReader   ePub   CrossRef-TDMCrossref - TDM
Background
The scuticociliate Miamiensis avidus is a major pathogenic agent that causes significant economic losses in the flounder aquaculture industry. Many different types of drugs are being tested to control this disease, including mebendazole, which is a broad-spectrum antiprotozoal agent. The purpose of this study was to determine whether mebendazole worked in vitro against M. avidus and to explore its mechanism of action.
Methods
Transcriptome and gene ontology analyses were conducted to investigate the specifically expressed gene profile. We confirmed the cytotoxic effect of mebendazole against M. avidus when it was applied intermittently for a total of three times. We also identified differentially expressed genes using transcriptome analysis.
Results
Most of the upregulated genes were membrane transport-related genes, including Na+/K+-ATPase. Most of the downregulated genes were categorized into three groups: tubulin-related, metabolism-related, and transport-related genes. The expression levels of glucose uptake-related genes decreased due to the inhibition of tubulin polymerization, but this was not statistically significant.
Conclusions
Our results demonstrate that intermittent treatment with mebendazole has a significant cytotoxic effect on M. avidus. Furthermore, mebendazole induces downregulation of the tubulin-alpha chain and metabolism-related genes. It is presumed that this leads to a glucose shortage and the death of M. avidus. Transcriptome analysis will provide useful clues for further studies on mebendazole applications for scutica control.
Transcriptome analysis of the pathogenic ciliate Miamiensis avidus after hydrogen peroxide treatment
Hyunsu Kim, A-Reum Lee, Kyung-Yoon Jeon, Eun-Ji Ko, Hee-Jae Cha, Mee Sun Ock
Kosin Med J. 2022;37(1):52-60.   Published online March 11, 2022
DOI: https://doi.org/10.7180/kmj.21.040
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Abstract PDFPubReader   ePub   CrossRef-TDMCrossref - TDM
Background
The scuticociliate Miamiensis avidus is a highly pathogenic ciliate responsible for serious damage to various organs of aquaculture fish. In particular, the olive flounder aquaculture industry is suffering massive losses due to M. avidus infection. Hydrogen peroxide (H2O2) is one of the most widely used chemicals for scuticociliate treatment. Despite the superior killing effect of H2O2, studies on transcription levels and gene expression changes after H2O2 treatment are limited. We conducted an mRNA transcriptome analysis to compare the expressed gene (DEG) profiles between the ciliate and cyst-like stages of M. avidus after H2O2 treatment.
Methods
We applied differentially expressed gene profiling to identify DEGs during the ciliate and cyst-like stages of M. avidus.
Results
There were 5,967 DEGs among the 9,075 transcripts identified, and 50 of these DEGs were significantly different (p<0.05). Among these, 21 DEGs were upregulated and 29 were downregulated in the cyst-like stage. The most significantly upregulated genes during the change to the cyst-like stage were cytochrome c oxidase genes. Genes related to the calcium channel were also highly upregulated.
Conclusion
The significant upregulation of cytochrome c gene expression and cytosolic calcium ion channel-related gene expression after H2O2 treatment suggests that ciliate mortality occurred through apoptosis. The formation of the cyst-like stage is considered a temporary form during the process of apoptosis. Information on the gene expression profile of M. avidus in response to H2O2 is expected to contribute to the understanding of the mechanism of action of therapeutic agents against this pathogen.
Preventive and Therapeutic Effects of Anisakis simplex Larval Protein in a Mouse Model of Crohn’S Disease
Hee-Jae Cha, Mee Sun Ock
Kosin Med J. 2013;28(2):107-113.   Published online January 19, 2013
DOI: https://doi.org/10.7180/kmj.2013.28.2.107
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Abstract PDFPubReader   ePub   CrossRef-TDMCrossref - TDM
Objectives

Some helminths have been known to have a treatment effect in inflammatory bowel diseases, including Crohn’s disease (CD); however, live parasite therapy can cause unwanted side effects. To develop a safe therapeutic, we investigated the preventive or therapeutic potential of proteins from the third stage larva of A. simplex in a mouse model. We also analyzed the cytokine profile from splenic and mesenteric lymph node lymphocytes to elucidate the underlying immunological mechanism.

Methods

CD was induced in mice with DSS, and the effect of an A. simplex larval protein on CD was assessed. A change in body weight and DAI (disease activity index) were observed in mice. The expression levels of cytokines from mesenteric lymph nodes (MLN) compared to splenic lymphocytes were measured with ELISA.

Results

Peritoneal administration of preventive and therapeutic A. simplex larval proteins attenuated DSS-induced CD by a reduction of the DAI and weight loss. A shortening of colon length was more definitely observed in the therapeutic group than in the preventive group. The cytokine expression levels were more obvious in lymphocytes from mesenteric lymph nodes than from splenic lymphocytes.

Conclusions

Taken together, these results suggest that A. simplex proteins can change cytokine profiles and may have a preventive effect in DSS-induced CD mice.

Anisakidosis in Korea; Changes Over the Last Decade
Hee Jae Cha, Mee Sun Ock
Kosin Med J. 2012;27(2):73-78.   Published online December 27, 2012
DOI: https://doi.org/10.7180/kmj.2012.27.2.73
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Abstract PDFPubReader   ePub   CrossRef-TDMCrossref - TDM

Anisakidosis is caused by Anisakis simplex and other anisakids larvae parasitizing marine fish and cephalopods. A lot of case reports about anisakidosis have been published in Korea because of raw fish eating habits. Recently seafood consumption has continued to increase due to health concerns and thus, it increases the risk for infectious diseases including anisakidosis. The aim of this review is to analyze the clinical and epidemiological characteristics of anisakidosis during the last 10 years in Korea, based on the case reports published from 2000 to 2010. The incidence age was changed from 30s and 40s to 50s. The young generation was considered to consume seafood in various ways, including raw fish as well. The most noticeable change was the appearance of Anisakis allergy patients over the last decade. The patients showed abdominal pain, urticaria after eating sea food. It reaffirmed that anisakid infection induces not only gastric and intestinal anisakidosis but also cause allergic reaction. Anisakid should be considered as a possible causative food allergen provoking allergic responses after eating raw fish.

Citations

Citations to this article as recorded by  
  • Anisakidosis
    Heung Up Kim
    The Korean Journal of Helicobacter and Upper Gastrointestinal Research.2019; 19(1): 23.     CrossRef
  • An Overview of Fish-borne Nematodiases among Returned Travelers for Recent 25 Years– Unexpected Diseases Sometimes Far Away from the Origin
    Jorge Costa Eiras, Gilberto Cezar Pavanelli, Ricardo Massato Takemoto, Yukifumi Nawa
    The Korean Journal of Parasitology.2018; 56(3): 215.     CrossRef
Hydrolases Activity of Excretory-Secretory Proteins and Crude Extract from Anisakis simplex Larval Stages
Mee Sun Ock
Kosin Med J. 2008;23(4):64-68.   Published online December 31, 2008
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Two Cases of Rifampicin Induced Pseudomembranous Colitis in Patients Who Underwent Anti-Tuberculosis Therapy
Bong Jin Kim, Kyun Hong Kwon, Chang Sup Lim, Ja Young Kim, Joung Boom Hong, Mee Sun Ock, Yong Mock Bae, Jee Yeon Kim
Kosin Med J. 2008;23(4):264-267.   Published online December 31, 2008
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Cloning and sequence analysis of a cDNA from Dermatophagoides farinae homologous to group III allergen
Bong Jin Kim, Sun Mi Kim, Tai Hyun Yu, Mee Sun Ock
Kosin Med J. 2006;21(1):242-247.
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Comparative Study on the Specificity and the Sensitivity of Immunoserologic Tests for Trematodes
Mee Sun Ock
The Journal of Kosin Medical College. 1992;8(1):57-62.
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  • 1 Download
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Karyotype analysis of Blattella germanica L. and Blattella nipponica Asahina in Korea
Mee Sun Ock, Kang Ryune Kim
The Journal of Kosin Medical College. 1989;5(2):21-25.
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Transfer of Immunity by Serum and lymphoid cells immunized with Clonorchis sinensis
Mee sun Ock
The Journal of Kosin Medical College. 1988;4(1):85-91.
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  • 1 Download
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KMJ : Kosin Medical Journal