Lipoteichoic acid and Wall teichoic acid (LTA/WTA)

Teichoic acids (TA) and lipoteichoic acids (LTA) are major anionic glycopolymers found within the cell wall of Gram-positive bacteria, including the Lactobacillus genus. Wall teichoic acids (WTA) are covalently linked to peptidoglycan, while LTAs are anchored to the cytoplasmic membrane via a lipid moiety (Brown et al., 2013). These molecules play critical roles in maintaining cell wall integrity, regulating ion homeostasis, and facilitating bacterial adhesion to host tissues (Swoboda et al., 2010). In the context of Lactobacillus, LTAs are significant immunomodulators that interact with host Pattern Recognition Receptors, specifically Toll-like Receptor 2 (TLR2) (Grangette et al., 2005). This interaction can trigger anti-inflammatory or pro-inflammatory cytokine profiles, contributing to the probiotic effects of these bacteria. While often viewed as beneficial in commensals, LTAs in pathogenic species are potent inflammatory mediators and serve as targets for certain antibiotics like daptomycin. Daptomycin disrupts the cell membrane in an LTA-dependent manner, leading to rapid bacterial cell death (Heidary et al., 2014). Research into Lactobacillus LTAs focuses on their potential to treat inflammatory bowel diseases and allergies through immune system priming.

Other names

Lipoteichoic acidWall teichoic acidLTAWTAGlycerol phosphate polymerRibitol phosphate polymerLactobacillus LTA

Antibiotics like daptomycin bind to LTA to facilitate membrane insertion and disruption (Heidary et al., 2014). Probiotic LTAs act as agonists for host Toll-like receptor 2 (TLR2) to modulate immune signaling and cytokine production (Grangette et al., 2005).