Tylvalosin

Tylvalosin (Acetylisovaleryltylo?sin) is an orally active, broad-spectrum macrolide antibiotic with antimicrobial activity. Tylvalosin is an antiviral agent used to study PRRSV infection. Tylvalosin induces apoptosis. Tylvalosin also has anti-inflammatory activity, alleviates oxidative stress, and alleviates acute lung injury by inhibiting NF-魏B activation.

Tylvalosin (10 渭g/mL; 0.5, 1 h) increases caspase-3 cleavage in porcine neutrophils, leading to DNA fragmentation during apoptosis^[4].
Tylvalosin (0.1-10 渭g/mL; 0.5 h) promotes endocytosis of porcine neutrophils by macrophages without changing phagocytosis^[4].

Tylvalosin tartrate (160 mg/kg; po; 7 d) can reduce the stress state of pigs during the immunization process with PRRSV inactivated vaccine and improve the health of pig^[5].

[1]. Albert Philip Adrian Mockett, et al. Use of tylvalosin as antiviral agent. Patent. WO2008007104.

[2]. Zhao Z, et al. Tylvalosin exhibits anti-inflammatory property and attenuates acute lung injury in different models possibly through suppression of NF-魏B activation. Biochem Pharmacol. 2014 Jul 1;90(1):73-87. 

[3]. Moges R, et al. Anti-Inflammatory Benefits of Antibiotics: Tylvalosin Induces Apoptosis of Porcine Neutrophils and Macrophages, Promotes Efferocytosis, and Inhibits Pro-Inflammatory CXCL-8, IL1伪, and LTB4 Production, While Inducing the Release of Pro-Resolving Lipoxin A4 and Resolvin D1. Front Vet Sci. 2018 Apr 11;5:57.