MPA Alters BCG-Induced Cytokine Secretion
Author Information
Author(s): Kleynhans Léanie, Du Plessis Nelita, Black Gillian F., Loxton André G., Kidd Martin, van Helden Paul D., Walzl Gerhard, Ronacher Katharina
Primary Institution: Stellenbosch University
Hypothesis
Does medroxyprogesterone acetate (MPA) affect immune responses to BCG in women using this contraceptive?
Conclusion
MPA use is associated with lower levels of certain cytokines in response to BCG, suggesting it may impact susceptibility to tuberculosis.
Supporting Evidence
- MPA users produced significantly lower levels of IL-1α, IL-12p40, IL-10, IL-13, and G-CSF in response to BCG.
- Lower circulating monocyte levels were observed in MPA users.
- MPA mimicked the effects of cortisol rather than progesterone on immune responses.
Takeaway
Women using a certain birth control called MPA may have weaker immune responses to a tuberculosis vaccine, which could make them more likely to get sick.
Methodology
The study involved a cross-sectional case control design with cytokine analysis from PBMCs of women using MPA and non-contraceptive users.
Potential Biases
Potential bias due to the exclusion of certain demographics like HIV positive and pregnant women.
Limitations
The small sample size for some analyses limits the ability to draw strong conclusions.
Participant Demographics
Female household contacts of active TB patients, ages 15-45, with 40.5% using contraceptives.
Statistical Information
P-Value
p<0.001
Confidence Interval
95% CI
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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