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The study of structure and effects of two new proanthocyanidins from Anogeissus pendula leaves on rumen enzyme activities
Journal article   Open access   Peer reviewed

The study of structure and effects of two new proanthocyanidins from Anogeissus pendula leaves on rumen enzyme activities

Suman Lata, Pushpendra Koli, Pushpendra Koli, Sultan Singh, B. K. Bhadoria, Umesh Chand and Yonglin Ren
Frontiers in veterinary science, Vol.10, Art. 1163197
2023
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CC BY V4.0 Open Access

Abstract

Anogeissus pendula bioactivity score drug score epicatechin gallocatechin proanthocyanidins
Two novel proanthocyanidins, (2R, 3R)-(+)-Gallocatechin-(4β → 8)4-(2R, 3R)-(+)-gallocatechin (compound 1) and 3-O-galloyl-(2S, 3S)-(–)-epicatechin-(4α → 8)-[3-O-galloyl-(2S, 3S)-(–)-epicatechin (4α → 8)]2-(2S, 3S)-(–)-epicatechin (compound 2), were structurally characterized from leaves of Anogeissus pendula. The structures were determined by ultraviolet spectroscopy (UV), proton nuclear magnetic resonance (1H NMR), 13C NMR, and heteronuclear multiple bond correlation. Molinspiration and Osiris property explorer applications were used to predict bioactivity and drug score. Drug scores of 0.08 and 0.05 were predicted for compounds 1 and 2, respectively. Predicted bioactivity scores were high. Due to their molecular weight, chemical structure, and conformation, the newly discovered proanthocyanidins possess an inclination to interact with proteins. Based on this premise, both compounds were subjected to in vitro testing against ruminal enzymes. They exhibited significant inhibition activities (p < 0.01) with a range of half maximal effective concentration (EC50) of 14.80–17.88 mg/mL of glutamic oxaloacetic transaminase in both protozoa and bacteria fractions. The ruminal glutamic pyruvic transaminase activity was significantly inhibited (p < 0.01) from EC50 12.59–16.29 mg/mL, and R-cellulase inhibition was recorded with EC50 18.20–21.98 mg/mL by compounds 1 and 2, respectively. Protease activity decreased with increasing incubation time and concentration of both compounds. The novel proanthocyanidins have potential roles in improving feed conversion ratios and in drug development.

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Collaboration types
Domestic collaboration
International collaboration
Citation topics
3 Agriculture, Environment & Ecology
3.51 Dairy & Animal Sciences
3.51.84 Ruminant Nutrition
Web Of Science research areas
Veterinary Sciences
ESI research areas
Plant & Animal Science
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