Synthesis and evaluation of 4-Hydroxyderricini (4-HD) and its analogs as potential agents against tuberculosis

• Grant number: 19/11979-4
• Support Opportunities: Scholarships in Brazil - Master
• Start date: October 01, 2019
• End date: April 30, 2021
• Field of knowledge: Health Sciences - Pharmacy
• Principal Investigator: Luis Octávio Regasini
• Grantee: Reinaldo dos Santos Theodoro
• Host Institution: Instituto de Biociências, Letras e Ciências Exatas (IBILCE). Universidade Estadual Paulista (UNESP). Campus de São José do Rio Preto. São José do Rio Preto , SP, Brazil

Abstract

Tuberculostatics are crucial drugs to for life expectancy, mainly to HIV-positive patients. Several reasons justify the need for new antimycobacterial, including high morbilitiy and mortality related to tuberculosis. The resurgence of multidrug resistant (MDR-TB) and extensively drug resistant (XDR-TB), typical morphophysiological features of Mycobacterium tuberculosis, as well as phenotypical forms (active and latent), also are challenge to discovery of tuberculostatics. Thus, efforts are necessary to discover and develop tuberculostatic with innovative structural and mechanistic patterns. The current project aims the synthesis and biological evaluation of 4-hydroxyderricin (4-HD), an antibacterial C-isoprenylated chalcone with unexplored tuberculostatic activity. Three series of analogs of IBC will be synthesized. Series I, II and III will exhibit modifications on chalconic ring A, ring B and alpha,beta-unsaturated ketone, respectively. The synthetical strategy will include iodation and Suzuki coupling reactions, allowing C-prenylation at carbon C-3' (ring A). The antimycobacterial potency will be determined against sensitive H37Rv and clinical isolates (MDR-TB and XDR-TB) strains., indicating Minimum Inhibitory Concentration (MIC) values. The n-octanol/water partition coefficient (log Po/w) will be performed by HPLC-DAD experiment, aiming to relate hydrophobicity and antimycobacterial activity of chalcones. The values of log Po/w and melting points of chalcones will be used in the prection of water-solubility (log S), by using of General Solubility Equation. Antimycobacterial compounds (MIC H37Rv < 10 uM) will be submitted to toxicity evaluations against eukaryotic cells, including murine macrophages (J774A.1), human fibroblasts (MRC-5) and human hepatocytes HepG2), stablishing selective index (IS - IC50 eukaryote/MIC H37Rv). Chalcones that exhibited SI (macrophage) > 10 will be selected to evaluation against intramacrophagic forms of Erdman M. tuberculosis. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

TEMPONE, ANDRE GUSTAVO; DOS SANTOS THEODORO, REINALDO; ROMANELLI, MAIARA MARIA; FERREIRA, DAYANA AGNES SANTOS; AMARAL, MAIARA; DE ASSIS, LETICIA RIBEIRO; CRUZ, LUCAS MONTEIRO SANTA; COSTA, ALAN ROBERTO; ZANELLA, ROSEMEIRE COBO; CHRISTODOULIDES, MYRON; et al. A new reduced chalcone-derivative affects the membrane permeability and electric potential of multidrug-resistant Enterococcus faecalis. Chemico-Biological Interactions, v. 365, p. 8-pg., 2022-08-10. (14/18330-0, 21/04464-8, 18/26655-7, 19/11979-4, 17/50333-7, 18/15083-2, 09/53989-4)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

THEODORO, Reinaldo dos Santos. Synthesis and antibacterial and antimycobacterial evaluation of 4-hydroxyderricin and its analogs. 2022. Master's Dissertation - Universidade Estadual Paulista (Unesp). Instituto de Biociências Letras e Ciências Exatas. São José do Rio Preto São José do Rio Preto.