**Background**
The maintenance of a robust immune system is critical for mammalian survival and overall health. Redox co-factors play a pivotal role in modulating cellular oxidative stress and supporting the enzymatic activities necessary for immune responses. Among these, certain orthoquinones act as essential nutrients that facilitate electron transfer and maintain cellular homeostasis. A deficiency in these vital co-factors can lead to severe physiological impairments, including compromised immunity and systemic developmental issues. Understanding the role of these metabolites is essential for developing nutritional and therapeutic interventions to enhance immune function. In this context, we will introduce a redox-cycling orthoquinone – Pyrroloquinoline quinone disodium salt.
**Definition**
Pyrroloquinoline quinone disodium salt is an anionic, redox-cycling orthoquinone that serves as a redox co-factor. It is an endogenous metabolite found in mammal tissues and is also isolated from cultures of methylotropic bacteria.
**In Vitro and In Vivo Studies**
According to the Pyrroloquinoline quinone disodium salt description, this compound is an essential nutrient for mammals and is particularly important for the regulation of immune function. The Pyrroloquinoline quinone disodium salt formula is $\text{C}_{14}\text{H}_4\text{N}_2\text{Na}_2\text{O}_8$ with a molecular weight of 374.17. Regarding its biological impact, Pyrroloquinoline quinone disodium salt in vivo studies have demonstrated that the absence of this nutrient leads to significant health deficits. Specifically, mouse pups born to and nursing from dams deprived of Pyrroloquinoline quinone disodium salt exhibit a compromised immune response. Furthermore, these deficient pups display clinical signs such as alopecia, a hunched posture, and an increased susceptibility to the development of aortic aneurysms. These findings highlight the critical role of this metabolite in maintaining vascular integrity and immune competence. In conclusion, Pyrroloquinoline quinone disodium salt is a vital redox co-factor essential for mammalian immune function and systemic development.
Keywords
Pyrroloquinoline quinone disodium, 122628-50-6, PQQ disodium, Methoxatin disodium, Endogenous Metabolite, redox, co-factor, anionic, methylotropic, bacteria, essential, nutrient, immune, function, Inhibitor
References
[1] Moog RS, et al. Evidence for methoxatin (pyrroloquinolinequinone) as the cofactor in bovine plasma amine oxidase from resonance Raman spectroscopy. Proc Natl Acad Sci U S A. 1986 Nov;83(22):8435-9.
[2] Bishop A, et al. Methoxatin (PQQ) in guinea-pig neutrophils. Free Radic Biol Med. 1994 Oct;17(4):311-20.