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Toxoplasma gondii & Human Phenotype

Compendium of Known Effects and Ongoing Research

genetic-characterization

Strategies developed by Toxoplasma gondii to survive in the host

January 31, 2020
Zhu, W. B., Li, J. Y., Pappoe, F., Shen, J. L., Yu, L.
Frontiers in Microbiology 2019, 10
Click for abstract
One of the most successful intracellular parasites, Toxoplasma gondii has developed several strategies to avoid destruction by the host. These include approaches such as rapid and efficient cell invasion to avoid phagocytic engulfment, negative regulation of the canonical CD40-CD40L-mediated autophagy pathway, impairment of the noncanonical IFN-gamma-dependent autophagy pathway, and modulation of host cell survival and death to obtain lifelong parasite survival. Different virulent strains have even evolved different ways to cope with and evade destruction by the host. This review aims to illustrate every aspect of the game between the host and Toxoplasma during the process of infection. A better understanding of all aspects of the battle between Toxoplasma and its hosts will be useful for the development of better strategies and drugs to control the parasite.

Tagged: acute virulence, autophagy, autophagy proteins, cell invasion, dense granule protein, genetic-characterization, human-fibroblasts, immune evasion, immune-response, mironeme proteins, nitric oxide, Toxoplasma

Reviews

Toxoplasma gondii infection in cancer patients: Prevalence, risk factors, genotypes and association with clinical diagnosis

October 9, 2015
Cong, W., Liu, G. H., Meng, Q. F., Dong, W., Qin, S. Y., Zhang, F. K., Zhang, X. Y., Wang, X. Y., Qian, A. D.,
Cancer Letters 2015; 359: 307-313
Click for abstract
Prevalence of human infection with Toxoplasma gondii has been increasing in China due to the increasing number of cats. However, little is known of the epidemiology of T. gondii infection in different cancer patient groups. Thus, a case-control study of 900 cancer patients and 900 controls was conducted to detect anti-T. gondii antibodies by ELISA in China. Genomic DNA was extracted from the diseased tissues of 510 patients and the T. gondii B1 gene was amplified using a semi-nested PCR. DNA samples giving positive B1 amplification were then genetically characterized using multi-locus PCR-RFLP. The prevalence of anti-T. gondii IgG in cancer patients (35.56%) was significantly higher than that in controls (17.44%). The highest T. gondii seroprevalence was detected in lung cancer patients (60.94%), followed by cervical cancer patients (50%), brain cancer patients (42.31%) and endometrial cancer patients (41.67%). Exposure with soil and consumption of raw/undercooked meat were significantly associated with T. gondii infection in cancer patients. Three T. gondii genotypes (ToxoDB#9, ToxoDB#10 and Type I variant) were identified. In conclusion, T gondii infection is a severe problem in cancer patients and it is imperative that improved integrated measures should be conducted to prevent and control T gondii infection in cancer patients.

Tagged: america, antibodies, cancer-patients, china, clonal lineages, comprise, europe, genetic-characterization, genotype, oocysts, pregnant women, prevalence, risk factors, strains, Toxoplasma gondii

Physical health

Topics

  • Behavior 105
  • Cognitive functions 64
  • Mental health 439
  • Morphology 6
  • Motor functions 10
  • Personality 36
  • Physical health 134
  • Reproduction 36
  • Reviews 40
  • Sensory functions 3
  • Uncategorized 2

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Recent articles

  • Mortality Patterns of Toxoplasmosis and Its Comorbidities in Tanzania: A 10-Year Retrospective Hospital-Based Survey February 6, 2020
  • The role of latent toxoplasmosis in the aetiopathogenesis of schizophrenia–the risk factor or an indication of a contact with cat? February 6, 2020
  • The Association between Toxoplasma gondii Infection and Risk of Parkinson’s Disease: A Systematic Review and Meta-Analysis February 6, 2020

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