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Related Experiment Video

Updated: Dec 21, 2025

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The Ratiometric Transcript Signature MX2/GPR183 Is Consistently Associated With RTS,S-Mediated Protection Against

Ying Du1, Ethan G Thompson2, Julius Muller3

  • 1Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, United States.

Frontiers in Immunology
|May 16, 2020
PubMed
Summary
This summary is machine-generated.

The RTS,S/AS01 malaria vaccine offers partial protection. A specific blood transcript ratio (MX2/GPR183) measured after immunization helps identify individuals who develop protective immunity, complementing antibody levels.

Keywords:
clinical immunologyhuman challengeinterferon responsemalaria vaccinessystems vaccinologyvaccine correlates

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Area of Science:

  • Immunology
  • Vaccinology
  • Infectious Diseases

Background:

  • The RTS,S/AS01 vaccine confers partial protection against *Plasmodium falciparum* malaria.
  • Determinants of vaccine-induced protection remain incompletely understood.
  • Previous studies linked anti-circumsporozoite protein (CSP) antibody titers and blood RNA signatures to RTS,S/AS01 efficacy in controlled human malaria infection (CHMI) models.

Purpose of the Study:

  • To identify host biomarkers that predict RTS,S/AS01 vaccine efficacy.
  • To investigate the host immune response signatures associated with protection against malaria following RTS,S/AS01 vaccination.

Main Methods:

  • Analysis of host blood transcriptomes from five independent RTS,S vaccination CHMI studies.
  • Quantification of gene expression ratios, specifically MX2/GPR183, one day post-third immunization.
  • Correlation of transcriptomic signatures with protection status against malaria challenge.

Main Results:

  • A transcript ratio of MX2/GPR183, measured one day after the third RTS,S/AS01 immunization, effectively distinguishes between protected and non-protected individuals.
  • This MX2/GPR183 ratiometric signature provides predictive information complementary to anti-CSP antibody titers.
  • The findings suggest a role for interferon and oxysterol signaling pathways in the mechanism of RTS,S/AS01 vaccine action.

Conclusions:

  • The MX2/GPR183 blood transcript ratio is a promising host biomarker for predicting RTS,S/AS01 vaccine efficacy.
  • This molecular signature enhances the identification of individuals who mount a protective immune response to the malaria vaccine.
  • The study highlights potential pathways involved in RTS,S/AS01-mediated protection, guiding future vaccine development and immune response studies.