Harnessing the Role of HDAC6 in Idiopathic Pulmonary Fibrosis: Design, Synthesis, Structural Analysis, and Biological Evaluation of Potent Inhibitors.
Campiani, G., Cavella, C., Osko, J.D., Brindisi, M., Relitti, N., Brogi, S., Saraswati, A.P., Federico, S., Chemi, G., Maramai, S., Carullo, G., Jaeger, B., Carleo, A., Benedetti, R., Sarno, F., Lamponi, S., Rottoli, P., Bargagli, E., Bertucci, C., Tedesco, D., Herp, D., Senger, J., Ruberti, G., Saccoccia, F., Saponara, S., Gorelli, B., Valoti, M., Kennedy, B., Sundaramurthi, H., Butini, S., Jung, M., Roach, K.M., Altucci, L., Bradding, P., Christianson, D.W., Gemma, S., Prasse, A.(2021) J Med Chem 64: 9960-9988
- PubMed: 34251197 
- DOI: https://doi.org/10.1021/acs.jmedchem.1c00184
- Primary Citation of Related Structures:  
6V79 - PubMed Abstract: 
Idiopathic pulmonary fibrosis (IPF) is an interstitial lung disease characterized by a progressive-fibrosing phenotype. IPF has been associated with aberrant HDAC activities confirmed by our immunohistochemistry studies on HDAC6 overexpression in IPF lung tissues. We herein developed a series of novel h HDAC6 inhibitors, having low inhibitory potency over h HDAC1 and h HDAC8, as potential pharmacological tools for IPF treatment. Their inhibitory potency was combined with low in vitro and in vivo toxicity. Structural analysis of 6h and structure-activity relationship studies contributed to the optimization of the binding mode of the new molecules. The best-performing analogues were tested for their efficacy in inhibiting fibrotic sphere formation and cell viability, proving their capability in reverting the IPF phenotype. The efficacy of analogue 6h was also determined in a validated human lung model of TGF-β1-dependent fibrogenesis. The results highlighted in this manuscript may pave the way for the identification of first-in-class molecules for the treatment of IPF.
Organizational Affiliation: 
Department of Biotechnology, Chemistry and Pharmacy, DoE Department of Excellence 2018-2022, University of Siena, via Aldo Moro 2, 53100 Siena, Italy.