Title Rhinovirus C15 Attenuates Relaxation and cAMP Production in Human Airways and Smooth Muscle.
Author Gebski, Eric B; Parikh, Vishal; Lam, Hong; Kim, Nicholas; Bochkov, Yury; Cao, Gaoyuan; Panettieri, Reynold A Jr; Kurten, Richard; Gern, James; An, Steven S; Koziol-White, Cynthia J
Journal Am J Respir Cell Mol Biol Publication Year/Month 2023-Apr
PMID 37098126 PMCID -N/A-
Affiliation + expend 1.Rutgers Institute for Translational Medicine and Science, Child Health Institute, Rutgers University, New Brunswick, New Jersey, United States.

Rhinoviruses (RV) evoke up to 85% of acute asthma exacerbations in children, 50% in adults, and can induce airway hyperresponsiveness and decrease efficacy of current therapeutics to provide symptom relief. Utilizing human precision cut lung slices (hPCLS), primary human air-liquid interface differentiated airway epithelial cells (HAEC), and human airway smooth muscle (HASM) as pre-clinical experimental models, we demonstrated that RV-C15 attenuates agonist-induced bronchodilation. Specifically, airway relaxation to formoterol and cholera toxin, but not forskolin, was attenuated following hPCLS exposure to RV-C15. In isolated HASM cells, exposure to conditioned media from RV-exposed HAEC decreased cellular relaxation to isoproterenol and PGE2, but not forskolin. Additionally, cAMP generation elicited by formoterol and isoproterenol, but not forskolin, was attenuated following HASM exposure to RV-C15-conditioned HAEC media. HASM exposure to RV-C15-conditioned HAEC media modulated expression of components of relaxation pathways, specifically GNAI1 and GRK2. Strikingly, similar to exposure to intact RV-C15, hPCLS exposed to UV inactivated RV-C15 showed markedly attenuated airways relaxation in response to formoterol, suggesting that the mechanism(s) of RV-C15 mediated loss of bronchodilation is independent of virus replication pathways. Further studies are warranted to identify soluble factor(s) regulating the epithelial-driven smooth muscle loss of beta2-adrenergic receptor (beta2AR) function.

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