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Ashok A, H S A. Identification of DPP-IV inhibitory peptides derived from buffalo colostrum: Mining through bioinformatics, in silico and in vitro approaches. J Mol Recognit 2024; 37:e3090. [PMID: 38803118 DOI: 10.1002/jmr.3090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 04/18/2024] [Accepted: 05/12/2024] [Indexed: 05/29/2024]
Abstract
Bioactive peptides derived from foods provide physiological health benefits beyond nutrition. This study focused on profiling small peptide inhibitors against two key serine proteases, dipeptidyl peptidase-IV (DPP-IV) and prolyl oligopeptidase (POP). DPP-IV is a well-known protein involved in diverse pathways regulating inflammation, renal, cardiovascular physiology, and glucose homeostasis. POP is yet another key target protein for neurodegenerative disorders. The study evaluated peptide libraries of buffalo colostrum whey and fat globule membrane proteins derived from pepsin and pepsin-pancreatin digestion through in silico web tools and structure-based analysis by molecular docking and binding free-energy estimation, followed by in vitro assay for DPP-IV inhibition for the lead peptides. The bioinformatic study indicated 49 peptides presented motifs with DPP-IV inhibition while 5 peptides with sequences for POP inhibition. In the molecular docking interactions study, 22 peptides interacted with active site residues of DPP-IV and 3 peptides with that of POP. The synthesized peptides, SFVSEVPEL and LTFQHNF inhibited DPP-IV in vitro with an IC50 of 193.5 μM and 1.782 mM, respectively. The study revealed the key residues for inhibition of DPP-IV and POP thus affirming the DPP-IV inhibitory potential of milk-derived peptides.
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Affiliation(s)
- Arpitha Ashok
- DOS in Biotechnology, University of Mysore, Mysuru, India
| | - Aparna H S
- DOS in Biotechnology, University of Mysore, Mysuru, India
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Alshehri MM, Kumar N, Kuthi NA, Olaide Z, Alshammari MK, Bello RO, Alghazwni MK, Alshehri AM, Alshlali OM, Ashimiyu-Abdusalam Z, Umar HI. Computer-aided drug discovery of c-Abl kinase inhibitors from plant compounds against chronic myeloid leukemia. J Biomol Struct Dyn 2024:1-21. [PMID: 38517058 DOI: 10.1080/07391102.2024.2329297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 03/06/2024] [Indexed: 03/23/2024]
Abstract
Chronic myeloid leukemia (CML) is a hematological malignancy characterized by the neoplastic transformation of hematopoietic stem cells, driven by the Philadelphia (Ph) chromosome resulting from a translocation between chromosomes 9 and 22. This Ph chromosome harbors the breakpoint cluster region (BCR) and the Abelson (ABL) oncogene (BCR-ABL1) which have a constitutive tyrosine kinase activity. However, the tyrosine kinase activity of BCR-ABL1 have been identified as a key player in CML initiation and maintenance through c-Abl kinase. Despite advancements in tyrosine kinase inhibitors, challenges such as efficacy, safety concerns, and recurring drug resistance persist. This study aims to discover potential c-Abl kinase inhibitors from plant compounds with anti-leukemic properties, employing drug-likeness assessment, molecular docking, in silico pharmacokinetics (ADMET) screening, density function theory (DFT), and molecular dynamics simulations (MDS). Out of 58 screened compounds for drug-likeness, 44 were docked against c-Abl kinase. The top hit compound (isovitexin) and nilotinib (control drug) were subjected to rigorous analyses, including ADMET profiling, DFT evaluation, and MDS for 100 ns. Isovitexin demonstrated a notable binding affinity (-15.492 kcal/mol), closely comparable to nilotinib (-16.826 kcal/mol), showcasing a similar binding pose and superior structural stability and reactivity. While these findings suggest isovitexin as a potential c-Abl kinase inhibitor, further validation through urgent in vitro and in vivo experiments is imperative. This research holds promise for providing an alternative avenue to address existing CML treatment and management challenges.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Mohammed M Alshehri
- Pharmaceutical Care Department, Ministry of National Guard-Health Affairs, Riyadh, Kingdom of Saudi Arabia
| | - Neeraj Kumar
- Department of Pharmaceutical Chemistry, Bhupal Nobles' College of Pharmacy, Udaipur, India
| | - Najwa Ahmad Kuthi
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia (UTM), Johor, Malaysia
| | - Zainab Olaide
- Department of Biochemistry, Ibrahim Badamasi Babangida University, Lapai, Nigeria
| | | | - Ridwan Opeyemi Bello
- Computer-Aided Therapeutic Discovery and Design Platform, Federal University of Technology, Akure, Nigeria
| | | | | | | | - Zainab Ashimiyu-Abdusalam
- Computer-Aided Therapeutic Discovery and Design Platform, Federal University of Technology, Akure, Nigeria
- Department of Biochemistry and Nutrition, Nigerian Institute of Medical Research, Yaba, Nigeria
| | - Haruna Isiyaku Umar
- Computer-Aided Therapeutic Discovery and Design Platform, Federal University of Technology, Akure, Nigeria
- Department of Biochemistry, Federal University of Technology, Akure, Nigeria
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Xu HH, Yang L, Tang MX, Ye AP, Tu BD, Jiang ZH, Yi JF. From cis-Lobeline to trans-Lobeline: Study on the Pharmacodynamics and Isomerization Factors. Molecules 2022; 27:molecules27196253. [PMID: 36234790 PMCID: PMC9573392 DOI: 10.3390/molecules27196253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 09/14/2022] [Accepted: 09/19/2022] [Indexed: 11/29/2022] Open
Abstract
Lobeline is an alkaloid derived from the leaves of an Indian tobacco plant (Lobelia inflata), which has been prepared by chemical synthesis. It is classified as a partial nicotinic agonist and has a long history of therapeutic usage ranging from emetic and respiratory stimulant to tobacco smoking cessation agent. The presence of both cis and trans isomers in lobeline is well known, and many studies on the relationship between the structure and pharmacological activity of lobeline and its analogs have been reported. However, it is a remarkable fact that no studies have reported the differences in pharmacological activities between the two isomers. In this article, we found that different degrees of isomerization of lobeline injection have significant differences in respiratory excitatory effects in pentobarbital sodium anesthetized rats. Compared with cis-lobeline injections, the respiratory excitatory effect was significantly reduced by 50.2% after administration of injections which contained 36.9% trans-lobeline. The study on the influencing factors of isomerization between two isomers shown that this isomerization was a one-way isomerism and only converted from cis to trans, where temperature was the catalytic factor and pH was the key factor. This study reports a new discovery. Despite the widespread use of ventilators, first-aid medicines such as nikethamide and lobeline has retired to second line, but as a nonselective antagonist with high affinity for a4b2 and a3b2 nicotinic acetylcholine receptors (nAChRs). In recent years, lobeline has shown great promise as a therapeutic drug for mental addiction and nervous system disorders, such as depression, Alzheimer disease and Parkinson disease. Therefore, we suggest that the differences between two isomers should be concerned in subsequent research papers and applications.
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Affiliation(s)
- Huan-Hua Xu
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China
| | - Liang Yang
- School of Chemistry and Chemical Engineering, Hefei Normal University, Hefei 230601, China
| | - Ming-Xia Tang
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China
| | - An-Ping Ye
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China
| | - Bo-Dan Tu
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China
| | - Zhen-Hong Jiang
- Jiangxi Province Key Laboratory of Molecular Medicine, Nanchang 330006, China
| | - Jian-Feng Yi
- Research Center for Differentiation and Development of Traditional Chinese Medicine Basic Theory, Jiangxi University of Chinese Medicine, Nanchang 330004, China
- Correspondence:
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Huang P, Lv A, Yan Q, Jiang Z, Yang S. The structure and molecular dynamics of prolyl oligopeptidase from Microbulbifer arenaceous provide insights into catalytic and regulatory mechanisms. ACTA CRYSTALLOGRAPHICA SECTION D STRUCTURAL BIOLOGY 2022; 78:735-751. [DOI: 10.1107/s2059798322004247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 04/20/2022] [Indexed: 11/10/2022]
Abstract
Prolyl oligopeptidases (POPs) are atypical serine proteases that are unique in their involvement in the maturation and degradation of prolyl-containing peptide hormones and neuropeptides. They are potential pharmaceutical targets for the treatment of several neurodegenerative disorders, such as Alzheimer's disease. In this study, the catalytic and substrate-regulatory mechanisms of a novel bacterial POP from Microbulbifer arenaceous (MaPOP) were investigated. The crystal structure revealed that the catalytic triad of MaPOP was covered by the central tunnel of an unusual β-propeller domain. The tunnel not only provided the sole access to the active site for oligopeptides, but also protected large structured peptides or proteins from accidental proteolysis. The enzyme was able to cleave angiotensin I specifically at the carboxyl side of the internal proline residue, but could not hydrolyze long-chain bovine insulin B in vitro. Like the ligand-free structure, MaPOP bound to the transition-state analog inhibitor ZPR was also in a closed state, which was not modulated by the common `latching loop' found in other POPs. The substrate-assisted catalytic mechanism of MaPOP reported here may represent a common mechanism for all POPs. These results may facilitate a better understanding of the catalytic behavior of POPs under physiological conditions.
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