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Alkaloids from Popowia perakensis King and their potential as Dipeptidyl peptidase IV (DPP IV) inhibitors


Affiliations
1 Department of Chemistry, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak, Malaysia
2 Department of Chemistry, Faculty of Science, Universiti of Malaya, 50603 Kuala Lumpur, Malaysia
3 Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728 Kuala Lumpur, Malaysia
     

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A study on the alkaloidal composition on the Malaysian Annonaceae species, i.e Popowia perakensis King has been carried out. Barks of Popowia perakensis were extracted with hexane, dichloromethane and methanol, respectively. Dichloromethane extract further underwent the acid base treatment to give the alkaloidal crude extract. Isolation of compounds was carried out using various chromatography techniques including column chromatography and thin layer chromatography. Spectroscopic methods notably 1H, 13C NMR, IR, UV and GCMS spectroscopy were utilized to identify pure compounds in addition to comparison of reported data. Two azaanthraquinones alkaloids namely cleistopholine 1 and 6-methoxycleistopholine 2 together with simple isoquinolone alkaloid, N-methylcorydaldine 3 had been isolated. All three alkaloids are known but they were isolated for the first time from this species. Cleistopholine 1 was tested for Dipeptidyl peptidase IV (DPP IV) inhibition to investigate its potential antidiabetic activities. Results revealed that this compound showed quite weak (6.26 %) inhibitory activities as compared to the positive control, Diprotin A (81.46 %). The quantity of the other two compounds was insufficient for the screening purposes.

Keywords

Popowia perakensis King, Annonaceae, Azaanthraquinones, Simple Isoquinolone, DPP IV Activity.
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  • Alkaloids from Popowia perakensis King and their potential as Dipeptidyl peptidase IV (DPP IV) inhibitors

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Authors

Saripah Salbiah Syed Abdul Azziz
Department of Chemistry, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak, Malaysia
Mat Ropi Mukhtar
Department of Chemistry, Faculty of Science, Universiti of Malaya, 50603 Kuala Lumpur, Malaysia
A. Hadi
Department of Chemistry, Faculty of Science, Universiti of Malaya, 50603 Kuala Lumpur, Malaysia
Yuhanis Mhd Bakri
Department of Chemistry, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak, Malaysia
Ahmed Kareem Obaid Aldulaimi
Department of Chemistry, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak, Malaysia
Khalijah Awang
Department of Chemistry, Faculty of Science, Universiti of Malaya, 50603 Kuala Lumpur, Malaysia
Yumi Zuhanis Has-Yun Hashim
Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728 Kuala Lumpur, Malaysia

Abstract


A study on the alkaloidal composition on the Malaysian Annonaceae species, i.e Popowia perakensis King has been carried out. Barks of Popowia perakensis were extracted with hexane, dichloromethane and methanol, respectively. Dichloromethane extract further underwent the acid base treatment to give the alkaloidal crude extract. Isolation of compounds was carried out using various chromatography techniques including column chromatography and thin layer chromatography. Spectroscopic methods notably 1H, 13C NMR, IR, UV and GCMS spectroscopy were utilized to identify pure compounds in addition to comparison of reported data. Two azaanthraquinones alkaloids namely cleistopholine 1 and 6-methoxycleistopholine 2 together with simple isoquinolone alkaloid, N-methylcorydaldine 3 had been isolated. All three alkaloids are known but they were isolated for the first time from this species. Cleistopholine 1 was tested for Dipeptidyl peptidase IV (DPP IV) inhibition to investigate its potential antidiabetic activities. Results revealed that this compound showed quite weak (6.26 %) inhibitory activities as compared to the positive control, Diprotin A (81.46 %). The quantity of the other two compounds was insufficient for the screening purposes.

Keywords


Popowia perakensis King, Annonaceae, Azaanthraquinones, Simple Isoquinolone, DPP IV Activity.

References