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Source: Thailand Medical News  Oct 31, 2019  3 years, 10 months, 4 weeks, 19 hours, 59 minutes ago

Researchers Discover Inflammatory Protein That Can Stop Herpes Virus Spread

Researchers Discover Inflammatory Protein That Can Stop Herpes Virus Spread
Source: Thailand Medical News  Oct 31, 2019  3 years, 10 months, 4 weeks, 19 hours, 59 minutes ago
In a major breakthrough research, medical scientists at the University of Arizona College of Medicine have discovered a function in a pro-inflammatory protein that could play an important part in improving current and future therapeutics for the herpes virus.

The research study, published in the Journal of Immunology, investigated whether the protein IL-36g is an essential component of the immune response to a herpes infection, or if other mechanisms can compensate for the lack of IL-36g.

Cytokines, proteins essential to the immune system, coordinate the response to pathogens and allow for cell-to-cell communication. IL-36g is a pro-inflammatory cytokine identified 20 years ago. Over the years, researchers have shown that it exhibits an important function in chronic inflammatory diseases, but only recently have scientists studied its role in infectious diseases such as herpes.

Dr Melissa Herbst-Kralovetz, PhD, senior and corresponding author of the study and associate professor in the Department of Basic Medical Sciences at the College of Medicine,Phoenix in a phone interview with Thailand Medical News commented,  “We were the first group to detect IL-36g in the female reproductive tract and have been extending this work to evaluate the extent that this molecule can protect against, or contribute to, genital infection,”

The breakthrough study was led by Dr Jameson Gardner, a graduate research student in the laboratory of Dr. Herbst-Kralovetz who also commented,“Researchers have worked for decades to develop a vaccine to protect against genital herpes, but none has successfully passed through clinical trials.These efforts have taught us so much about the immune response in the female reproductive tract, but the lack of success potentially indicates that we need to better understand important underlying immune mechanisms in the female reproductive tract as we seek to improve women’s health.”
More than 260 million women worldwide are living with this lifelong infection and transmitting it to new individuals daily despite the widespread use of antiviral medications to treat genital herpes.

After the initial genital herpes simplex virus 2 (HSV-2) infection in the vaginal epithelium, the virus spreads through the nervous system, where it establishes latency. The virus goes into “hiding,” where it persists for a lifetime and periodically reactivates, causing lesions.

Dr Jameson Gardner further commented, “We really were excited to see that after intravaginal HSV-2 infection, the virus was able to spread systemically throughout the nervous system and to the brain in those lacking IL-36g, whereas our control group, which had the gene intact, was significantly more protected against HSV-2 sp read in the nervous system. We’ve shown that IL-36g appears to function in a previously uncharacterized manner to protect against herpes virus neuroinvasion (an infection that affects the nervous system).”

Dr. Herbst-Kralovetz further added “We stumbled across this neuroinvasion finding and we were able to confirm that IL-36g is limiting the spread of herpes virus from the genital tract to the nervous system.”

The exact mechanism in which IL-36g protects against neuroinvasion is unknown,but is an exciting and important area of future research.

In addition, researchers concluded IL-36g played a critical role in recruiting neutrophils, a type of white blood cell that protects against invading pathogens.

Dr Jameson Gardner said “Our understanding of how IL-36g functions can aid in the development of novel therapeutics to protect against and hopefully decrease the burden of STIs around the world. The global disease burden of sexually transmitted infections is huge, and this work helps us to better understand the role IL-36g plays in the female reproductive tract and how that could impact women’s health in general.”
Besides females, the herpes virus or HSV-2 affects millions of males and infections are also increasing through male to male sexual relations.

IL-36γ Is a Key Regulator of Neutrophil Infiltration in the Vaginal Microenvironment and Limits Neuroinvasion in Genital HSV-2 Infection. Jameson K. Gardner, Alison Swaims-Kohlmeier and Melissa M. Herbst-Kralovetz. J Immunol October 2, 2019, ji1900280; DOI:


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