Receptor from Streptococcus pyogenes as a potential antidote against sperm immobilization factor-induced sperm...

Area of Science:

• Immunology
• Microbiology
• Reproductive Biology

Background:

• Molecular mimicry between host and microbial antigens can impact immune responses.
• Spermatozoa and bacteria share antigenic determinants, potentially leading to cross-reactivity.
• Sperm immobilization factor (SIF) is implicated in compromising sperm function.

Purpose of the Study:

• To demonstrate molecular mimicry between mouse spermatozoa and Streptococcus pyogenes.
• To investigate the role of shared antigenic determinants in sperm-bacteria interactions.
• To evaluate the therapeutic potential of identified receptors in mitigating SIF-induced infertility.

Main Methods:

• Isolation of shared antigenic determinants between mouse spermatozoa and Streptococcus pyogenes.
• In vitro assessment of sperm parameters (motility, viability, morphology, Mg2+-ATPase activity) following SIF exposure and treatment.
• In vivo studies using BALB/c mice to evaluate the efficacy of SIF-binding receptors in alleviating infertility.

Main Results:

• Shared antigenic determinants ameliorated SIF-compromised sperm parameters in vitro.
• SIF-binding receptors from both spermatozoa (MS-SBR) and bacteria (S-SBR) blocked FITC-labeled SIF binding.
• MS-SBR and S-SBR significantly alleviated SIF-induced infertility in female BALB/c mice.

Conclusions:

• Evidence supports molecular mimicry between spermatozoa and Streptococcus pyogenes.
• Shared antigenic determinants play a role in SIF-mediated effects on sperm.
• Identified receptors (MS-SBR, S-SBR) demonstrate potential for therapeutic intervention in infertility.