A neoclerodane orthoester and other new neoclerodane diterpenoids from Teucrium yemense chemistry and effect on secretion of insulin

Abstract Teucrium yemense, a medicinal plant commonly grown in Saudi Arabia and Yemen, is traditionally used to treat infections, kidney diseases, rheumatism, and diabetes. Extraction of the dried aerial parts of the plant with methanol, followed by further extraction with butanol and chromatography...

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Autores principales: Mohammad Nur-e-Alam, Ifat Parveen, Barrie Wilkinson, Sarfaraz Ahmed, Rahman M. Hafizur, Ahmed Bari, Timothy J. Woodman, Michael D. Threadgill, Adnan J. Al-Rehaily
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Publicado: Nature Portfolio 2021
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spelling oai:doaj.org-article:82fc41ffecd743cc935b70e07d5596b32021-12-02T14:27:59ZA neoclerodane orthoester and other new neoclerodane diterpenoids from Teucrium yemense chemistry and effect on secretion of insulin10.1038/s41598-021-87513-32045-2322https://doaj.org/article/82fc41ffecd743cc935b70e07d5596b32021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87513-3https://doaj.org/toc/2045-2322Abstract Teucrium yemense, a medicinal plant commonly grown in Saudi Arabia and Yemen, is traditionally used to treat infections, kidney diseases, rheumatism, and diabetes. Extraction of the dried aerial parts of the plant with methanol, followed by further extraction with butanol and chromatography, gave twenty novel neoclerodanes. Their structures, relative configurations and some conformations were determined by MS and 1-D and 2-D NMR techniques. Most were fairly conventional but one contained an unusual stable orthoester, one had its (C-16)–(C-13)–(C-14)–(C-15) (tetrahydro)furan unit present as a succinic anhydride and one had a rearranged carbon skeleton resulting from ring-contraction to give a central octahydroindene bicyclic core, rather than the usual decalin. Mechanisms are proposed for the biosynthetic formation of the orthoester and for the ring-contraction. Four novel neoclerodanes increased the glucose-triggered release of insulin from isolated murine pancreatic islets by more than the standard drug tolbutamide, showing that they are potential leads for the development of new anti-diabetic drugs.Mohammad Nur-e-AlamIfat ParveenBarrie WilkinsonSarfaraz AhmedRahman M. HafizurAhmed BariTimothy J. WoodmanMichael D. ThreadgillAdnan J. Al-RehailyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-17 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Mohammad Nur-e-Alam
Ifat Parveen
Barrie Wilkinson
Sarfaraz Ahmed
Rahman M. Hafizur
Ahmed Bari
Timothy J. Woodman
Michael D. Threadgill
Adnan J. Al-Rehaily
A neoclerodane orthoester and other new neoclerodane diterpenoids from Teucrium yemense chemistry and effect on secretion of insulin
description Abstract Teucrium yemense, a medicinal plant commonly grown in Saudi Arabia and Yemen, is traditionally used to treat infections, kidney diseases, rheumatism, and diabetes. Extraction of the dried aerial parts of the plant with methanol, followed by further extraction with butanol and chromatography, gave twenty novel neoclerodanes. Their structures, relative configurations and some conformations were determined by MS and 1-D and 2-D NMR techniques. Most were fairly conventional but one contained an unusual stable orthoester, one had its (C-16)–(C-13)–(C-14)–(C-15) (tetrahydro)furan unit present as a succinic anhydride and one had a rearranged carbon skeleton resulting from ring-contraction to give a central octahydroindene bicyclic core, rather than the usual decalin. Mechanisms are proposed for the biosynthetic formation of the orthoester and for the ring-contraction. Four novel neoclerodanes increased the glucose-triggered release of insulin from isolated murine pancreatic islets by more than the standard drug tolbutamide, showing that they are potential leads for the development of new anti-diabetic drugs.
format article
author Mohammad Nur-e-Alam
Ifat Parveen
Barrie Wilkinson
Sarfaraz Ahmed
Rahman M. Hafizur
Ahmed Bari
Timothy J. Woodman
Michael D. Threadgill
Adnan J. Al-Rehaily
author_facet Mohammad Nur-e-Alam
Ifat Parveen
Barrie Wilkinson
Sarfaraz Ahmed
Rahman M. Hafizur
Ahmed Bari
Timothy J. Woodman
Michael D. Threadgill
Adnan J. Al-Rehaily
author_sort Mohammad Nur-e-Alam
title A neoclerodane orthoester and other new neoclerodane diterpenoids from Teucrium yemense chemistry and effect on secretion of insulin
title_short A neoclerodane orthoester and other new neoclerodane diterpenoids from Teucrium yemense chemistry and effect on secretion of insulin
title_full A neoclerodane orthoester and other new neoclerodane diterpenoids from Teucrium yemense chemistry and effect on secretion of insulin
title_fullStr A neoclerodane orthoester and other new neoclerodane diterpenoids from Teucrium yemense chemistry and effect on secretion of insulin
title_full_unstemmed A neoclerodane orthoester and other new neoclerodane diterpenoids from Teucrium yemense chemistry and effect on secretion of insulin
title_sort neoclerodane orthoester and other new neoclerodane diterpenoids from teucrium yemense chemistry and effect on secretion of insulin
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/82fc41ffecd743cc935b70e07d5596b3
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