Preclinical In Vitro Evaluation of an Innovative Nutraceutical Mixture Modulating the Histamine H1 Receptor-Preliminary Data.

The primary pathogenic mechanism of Type I hypersensitivity reactions involves histamine-mediated activation of the H1 receptor (H1R) and the subsequent signaling of the phospholipase C β-inositol trisphosphate (PLCβ-IP3) pathway. The present study evaluates the in vitro efficacy of a novel nutraceutical mixture-Quercetin, Perilla frutescens, Boswellia serrata, Blackcurrant, Parthenium, Helichrysum, Lactobacillus Acidophilus (L. acidophilus) and Bifidobacterium animalis (B. animalis)-in modulating HRH1 gene expression and the activation of the intracellular second messenger inositol trisphosphate (IP3). Quantitative PCR (qPCR) analysis revealed that the mixture downregulated HRH1 expression by approximately 33% (p < 0.05) compared to the control group. Furthermore, ELISA assays demonstrated that the mixture significantly reduced IP3 release by 10.30% (p < 0.05 vs. positive control). These results indicate that the nutraceutical mixture exerts its effects by modulating the H1R-PLCβ-IP3 pathway through the reduction in both H1 receptor gene expression and IP3 release. These findings suggest a potential mechanism of action involving the modulation of the histamine H1 receptor. Consequently, the mixture emerges as a promising candidate for further investigation into the H1R-IP3 activation cascade.