Cvetkovski, Aleksandar and Gjorgieva Ackova, Darinka and Smilkov, Katarina (2019) Screening for nutraceutical - drug interactions toward the non-covalent interactions of their solid binary systems. In: The European Network on Understanding Gastrointestinal Absorption-related Processes (UNGAP) Annual Meeting, 12-13 Feb 2019, Sofia, Bulgaria.
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Abstract
The revealed immunomodulating, antioxidant, chemopreventive and anticancer activity of the piperine, mayor alkaloid in fruits of the black pepper (Piper nigrum Linn.) and the long pepper (Piper Longum Linn.) which for many centuries are broadly used both as spice and as remedy in culinary and traditional medicine, respectively spurs our interest on the research of enhancing its low bioavailability.
On a purpose to study interactions between piperine and different pharmacotherapy classes of drugs and other natural compounds with both therapeutic and biological activity that differ by their molecular structures, our initial approach is to apply crystal engineering concept for growing single crystalline phases of cocrystallzed piperine with selected models of drug and natural compounds. Referring to the ternary amide structure of piperine which is formed between piperidine in chair conformation and piperic acid (5-(3,4-methylenedioxyphenyl)-2,4-pentadienoic acid), its side chain with conjugated double bonds impacts to the appearance of piperine in four possible geometric isomers [1,2]. We envisage that structural flexibility of piperine is favourable for forming amide-amide type of non-covalent H-bond interactions with drugs (e.g. secondary amide moiety in molecule of perindopril – ACE inhibitor, tertiary amide in prazosin- α-adrenoceptor antagonists, primary amide in carbamazepine – antiepileptic drug and etc. ) and for forming amide-catvoxylate and amide-hydroxyl H-bonding interaction with drugs and natural compounds (e.g. ascorbic acid with enediole structure and curcumine with β-diketo and hydroxyl benzoic moieties in its structure).
Regarding to our previously resolved structure of cocrystalized curcumine with ternary N-compound (not yet published) we present case study of solid binary systems containing piperine in combination with drugs and natural compounds with therapeutically activity.
Spectroscopic (FR-IR, Raman), Thermal (DSC-TG) and powder R-ray diffraction analyses confirms the H-bonding interactions and resolved structures reveal the patterns of packing and directionality of the interactions in crystal structures that offer opportunity to predict the mode of interactions of piperine in in vivo testing.
Grynpas M, Lindley FP. (1975) Acta Crystallogr B Struct Sci Cryst Eng Mater; 31: 2663–67.
Gorgani L, Mohammadi M, Najafpour GD, Nikzad M (2017) Compr Rev Food Sci Food Saf; 16: 124-40
| Item Type: | Conference or Workshop Item (Lecture) |
|---|---|
| Subjects: | Medical and Health Sciences > Basic medicine Engineering and Technology > Chemical engineering Natural sciences > Chemical sciences Engineering and Technology > Materials engineering Engineering and Technology > Nano-technology |
| Divisions: | Faculty of Medical Science |
| Depositing User: | Aleksandar Cvetkovski |
| Date Deposited: | 11 Sep 2019 12:16 |
| Last Modified: | 11 Sep 2019 12:16 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/22462 |
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