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Pomyalov S, Minetti CA, Remeta DP, Bonala R, Johnson F, Zaitseva I, Iden C, Golebiewska U, Breslauer KJ, Shoham G, Sidorenko VS, Grollman AP. Structural and mechanistic insights into the transport of aristolochic acids and their active metabolites by human serum albumin. J Biol Chem 2024; 300:107358. [PMID: 38782206 DOI: 10.1016/j.jbc.2024.107358] [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: 10/24/2023] [Revised: 04/08/2024] [Accepted: 04/17/2024] [Indexed: 05/25/2024] Open
Abstract
Aristolochic acids I and II (AA-I/II) are carcinogenic principles of Aristolochia plants, which have been employed in traditional medicinal practices and discovered as food contaminants. While the deleterious effects of AAs are broadly acknowledged, there is a dearth of information to define the mechanisms underlying their carcinogenicity. Following bioactivation in the liver, N-hydroxyaristolactam and N-sulfonyloxyaristolactam metabolites are transported via circulation and elicit carcinogenic effects by reacting with cellular DNA. In this study, we apply DNA adduct analysis, X-ray crystallography, isothermal titration calorimetry, and fluorescence quenching to investigate the role of human serum albumin (HSA) in modulating AA carcinogenicity. We find that HSA extends the half-life and reactivity of N-sulfonyloxyaristolactam-I with DNA, thereby protecting activated AAs from heterolysis. Applying novel pooled plasma HSA crystallization methods, we report high-resolution structures of myristic acid-enriched HSA (HSAMYR) and its AA complexes (HSAMYR/AA-I and HSAMYR/AA-II) at 1.9 Å resolution. While AA-I is located within HSA subdomain IB, AA-II occupies subdomains IIA and IB. ITC binding profiles reveal two distinct AA sites in both complexes with association constants of 1.5 and 0.5 · 106 M-1 for HSA/AA-I versus 8.4 and 9.0 · 105 M-1 for HSA/AA-II. Fluorescence quenching of the HSA Trp214 suggests variable impacts of fatty acids on ligand binding affinities. Collectively, our structural and thermodynamic characterizations yield significant insights into AA binding, transport, toxicity, and potential allostery, critical determinants for elucidating the mechanistic roles of HSA in modulating AA carcinogenicity.
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Affiliation(s)
- Sergei Pomyalov
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Conceição A Minetti
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, Piscataway, New Jersey, USA
| | - David P Remeta
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, Piscataway, New Jersey, USA
| | - Radha Bonala
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, New York, USA
| | - Francis Johnson
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, New York, USA; Department of Chemistry, Stony Brook University, Stony Brook, New York, USA
| | - Irina Zaitseva
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, New York, USA
| | - Charles Iden
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, New York, USA
| | - Urszula Golebiewska
- Department of Physiology, Stony Brook University, Stony Brook, New York, USA; Department of Biological Sciences, Queensborough Community College, Bayside, New York, USA
| | - Kenneth J Breslauer
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, Piscataway, New Jersey, USA; Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey, USA.
| | - Gil Shoham
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel.
| | - Viktoriya S Sidorenko
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, New York, USA.
| | - Arthur P Grollman
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, New York, USA.
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Rajendran D, Varghese RP, C GPD, Shivashankar M, Chandrasekaran N. Interaction of antidiabetic formulation with nanoplastics and its binary influence on plasma protein. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 102:104249. [PMID: 37597672 DOI: 10.1016/j.etap.2023.104249] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/08/2023] [Accepted: 08/15/2023] [Indexed: 08/21/2023]
Abstract
Nanoplastics exposure to humans becomes inevitable due to its prevalence and permanence. Adsorption of emerging pollutant metformin hydrochloride (Met-HCl) -antidiabetic drug, on polystyrene nanoplastics (PSNPs) and influence on plasma protein binding was investigated. Fluorescence studies were carried out for human serum albumin (HSA) binding. Adsorption follows pseudo-second-order kinetics, intraparticle-diffusion, and Langmuir isotherm, undergoing both physisorption and chemisorption which was validated by FE-SEM, FTIR, and HRMS measurements. Complex, experiences static quenching mechanism by hydrogen bonding and VanderWaals force of attraction to HSA. FTIR confirms the secondary structural alteration of HSA. Since Met-HCl covers the NPs' surface, NPs' affinity for HSA is reduced and they might reach the target organs of Met-HCl, disrupt antidiabetic mechanisms and cause far-reaching implications. Results from molecular docking and simulation studies backed up these results as hydrophobic and hydrogen bonds dominate the binding process of the HSA-Met-HCl-PSNPs complex. This work will aid in understanding of the toxico-kinetics/dynamics of binary contaminants.
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Affiliation(s)
- Durgalakshmi Rajendran
- Centre for Nanobiotechnology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Rinku Polachirakkal Varghese
- Department of Integrative Biology, School of Bioscience and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - George Priya Doss C
- Department of Integrative Biology, School of Bioscience and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Murugesh Shivashankar
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Natarajan Chandrasekaran
- Centre for Nanobiotechnology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India.
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Zhuang Y, Wang Y, Li N, Meng H, Li Z, Luo J, Qiu Z. Hydrolytic Metabolism of Withangulatin A Mediated by Serum Albumin Instead of Common Esterases in Plasma. Eur J Drug Metab Pharmacokinet 2023:10.1007/s13318-023-00834-8. [PMID: 37344636 DOI: 10.1007/s13318-023-00834-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2023] [Indexed: 06/23/2023]
Abstract
BACKGROUND AND OBJECTIVES The oral bioavailability of withangulatin A (WA) is low and may undergo first-pass metabolism because of the presence of two esters bonds. This study aimed to identify the hydrolysis behavior and mechanism of WA, thus enriching its structure-pharmacokinetic relationship. METHODS The in vivo pharmacokinetic studies of WA in rats were first investigated, followed by in vitro assays including metabolic stability, phenotyping identification and metabolic kinetics assays. After screening out the responsible enzymes with higher catalytic capacity, molecular docking study was performed to demonstrate the interaction mode between WA and metabolic enzymes. Then, metabolites in human serum albumin (HSA) were identified by LC-TOF-MS/MS. RESULTS In rats, the oral bioavailability of WA was only 2.83%. In vitro, WA was hydrolyzed in both rat and human plasma and could not be inhibited by selective esterase inhibitors. Physiologic concentration of HSA not recombinant human carboxylesterases (rhCES) could significantly hydrolyze WA, and it had a similar hydrolytic capacity with human plasma to WA. Furthermore, WA could stably bind to HSA by forming hydrogen bonds with Lys199 and Arg410, accompanied by the metabolic reaction of the lactone ring opening. CONCLUSION The study showed that WA underwent obvious hydrolysis in rat and human plasma, which implied a strong first-pass effect. Serum albumin rather than common esterases primarily contributed to the hydrolytic metabolism of WA in plasma.
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Affiliation(s)
- Yu Zhuang
- Department of Pharmacology, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
- Zhejiang Institute for Food and Drug Control, Hangzhou, China
| | - Yuxiao Wang
- Department of Pharmacology, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Ning Li
- National Experimental Teaching Demonstration Center of Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Haitao Meng
- Shimadzu (China) Co., LTD, Nanjing Branch, Nanjing, China
| | - Zhiyu Li
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, China
| | - Jianguang Luo
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China.
| | - Zhixia Qiu
- Department of Pharmacology, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
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Wu D, Gucwa M, Czub MP, Cooper DR, Shabalin IG, Fritzen R, Arya S, Schwarz-Linek U, Blindauer CA, Minor W, Stewart AJ. Structural and biochemical characterisation of Co 2+-binding sites on serum albumins and their interplay with fatty acids. Chem Sci 2023; 14:6244-6258. [PMID: 37325156 PMCID: PMC10266443 DOI: 10.1039/d3sc01723k] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 05/08/2023] [Indexed: 06/17/2023] Open
Abstract
Serum albumin-Co2+ interactions are of clinical importance. They play a role in mediating the physiological effects associated with cobalt toxicity and are central to the albumin cobalt binding (ACB) assay for diagnosis of myocardial ischemia. To further understand these processes, a deeper understanding of albumin-Co2+ interactions is required. Here, we present the first crystallographic structures of human serum albumin (HSA; three structures) and equine serum albumin (ESA; one structure) in complex with Co2+. Amongst a total of sixteen sites bearing a cobalt ion across the structures, two locations were prominent, and they relate to metal-binding sites A and B. Site-directed mutagenesis and isothermal titration calorimetry (ITC) were employed to characterise sites on HSA. The results indicate that His9 and His67 contribute to the primary (putatively corresponding to site B) and secondary Co2+-binding sites (site A), respectively. The presence of additional multiple weak-affinity Co2+ binding sites on HSA was also supported by ITC studies. Furthermore, addition of 5 molar equivalents of the non-esterified fatty acid palmitate (C16:0) reduced the Co2+-binding affinity at both sites A and B. The presence of bound myristate (C14:0) in the HSA crystal structures provided insight into the fatty acid-mediated structural changes that diminish the affinity of the protein toward Co2+. Together, these data provide further support for the idea that ischemia-modified albumin corresponds to albumin with excessive fatty-acid loading. Collectively, our findings provide a comprehensive understanding of the molecular underpinnings governing Co2+ binding to serum albumin.
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Affiliation(s)
- Dongmei Wu
- School of Medicine, University of St Andrews St Andrews UK +44 (0)1334 463546
| | - Michal Gucwa
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine Charlottesville VA 22908-0736 USA +1 434-243-6865
- Doctoral School of Exact and Natural Sciences, Jagiellonian University Krakow Poland
| | - Mateusz P Czub
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine Charlottesville VA 22908-0736 USA +1 434-243-6865
| | - David R Cooper
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine Charlottesville VA 22908-0736 USA +1 434-243-6865
| | - Ivan G Shabalin
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine Charlottesville VA 22908-0736 USA +1 434-243-6865
| | - Remi Fritzen
- School of Medicine, University of St Andrews St Andrews UK +44 (0)1334 463546
| | - Swati Arya
- School of Medicine, University of St Andrews St Andrews UK +44 (0)1334 463546
| | | | | | - Wladek Minor
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine Charlottesville VA 22908-0736 USA +1 434-243-6865
| | - Alan J Stewart
- School of Medicine, University of St Andrews St Andrews UK +44 (0)1334 463546
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Rajendran D, Chandrasekaran N, Waychal Y, Mukherjee A. Nanoplastics alter the conformation and activity of human serum albumin. NANOIMPACT 2022; 27:100412. [PMID: 35934234 DOI: 10.1016/j.impact.2022.100412] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 07/07/2022] [Accepted: 07/29/2022] [Indexed: 06/15/2023]
Abstract
Nanoplastics finds its presence in most of the consumer products. Their chance of coming in contact with human cells and components is rampant. This study focuses on the interaction of polystyrene nanoplastics (PSNPs) with human serum albumin (HSA), ultimately causing structural and functional properties of the protein. Fluorescence and UV-Visible spectroscopic studies reported that PSNPs form a spontaneous ground-state complex with HSA, by hydrogen bonding, van der waal's, and hydrophobic force of attraction. This causes changes in the environment around major aromatic amino acids, especially tryptophan-214, which has a strong affinity with PSNPs. Further docking analysis confirmed hydrophobic interactions between PSNPs and aromatic amino acids in subdomain IIA of HSA. A shift in amide bands in HSA, as determined by FTIR analysis confirmed the disturbances in its secondary structure followed by reordering which will lead to the unfolding of HSA. Besides, PSNPs reduce the esterase activity of HSA by competitive inhibition. This molecular-level information such as binding energy, binding site, binding forces, reversible or irreversible binding, and structural changes of protein will shed light on the extent of toxicity in humans. This study will emphasize the urgent need for regulation of the use of nanoplastics (NPs) in consumer products, as well as the need for more research to determine the fate of NPs in the biological system.
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Affiliation(s)
- Durgalakshmi Rajendran
- Centre for Nanobiotechnology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Natarajan Chandrasekaran
- Centre for Nanobiotechnology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India.
| | - Yojana Waychal
- Centre for Nanobiotechnology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Amitava Mukherjee
- Centre for Nanobiotechnology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
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Ultrasound-based radiomics score: a potential biomarker for the prediction of progression-free survival in ovarian epithelial cancer. Abdom Radiol (NY) 2021; 46:4936-4945. [PMID: 34120235 DOI: 10.1007/s00261-021-03163-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 02/06/2023]
Abstract
PURPOSE More than 80% of patients with ovarian epithelial cancer (OEC) show complete remission after initial treatment but eventually experience recurrence of the disease. This study aimed to develop a radiomics signature to identify a new prognostic indicator based on preoperative ultrasound imaging. METHODS A total of 111 patients with OEC who underwent transvaginal ultrasound before surgery were included. Of these, 76 were divided into the training cohort and 35 into the test cohort. We defined the region of interest (ROI) of the tumor by manually drawing the tumor contour on the ultrasound image of the lesion. The radiomics features were extracted from ultrasound images. The radiomics score (Rad-Score) was constructed using the least absolute shrinkage and selection operator (LASSO) analysis and Cox regression. Combined with the ultrasound radiomics features, significant clinical variables were also used to establish predictive models for 5-year progression-free survival (PFS) prediction. The efficiency of the model was evaluated using the area under the curve (AUC). Kaplan-Meier analysis was used to evaluate the association between the Rad-Score and PFS. RESULTS The combined model was superior to the clinical and Rad-Score models in estimating 5-year PFS and achieved an AUC of 0.868 (95%CI 0.766-0.971) in the training cohort. The Rad-Score was negatively correlated with prognosis in the training and test cohorts. CONCLUSIONS The combined model that incorporated both clinical parameters and ultrasound radiomics features achieved a good prognosis in patients with OEC, which might aid clinical decision-making.
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Gao Y, Yue Y, Xiong S. An Albumin-Binding Domain Peptide Confers Enhanced Immunoprotection Against Viral Myocarditis by CVB3 VP1 Vaccine. Front Immunol 2021; 12:666594. [PMID: 34630378 PMCID: PMC8492941 DOI: 10.3389/fimmu.2021.666594] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 09/06/2021] [Indexed: 11/13/2022] Open
Abstract
Coxsackievirus B3 (CVB3)-induced viral myocarditis is a common clinical cardiovascular disease without effective available vaccine. In this study, we tried to potentiate the immunoprotection efficacy of our previous CVB3-specific VP1 protein vaccine by introducing a streptococcal protein G-derived, draining lymph nodes (dLNs)-targeting albumin-binding domain (ABD) peptide. We found that compared with the original VP1 vaccine, ABD-fused VP1 (ABD-VP1) vaccine gained the new ability to efficiently bind murine albumin both in vitro and in vivo, possessed a much longer serum half-life in serum and exhibited more abundance in the dLNs after immunization. Accordingly, ABD-VP1 immunization not only significantly facilitated the enrichment and maturation of dendritic cells (DCs), induced higher percentages of IFN-γ+ CD8 + cells in the dLNs, but also robustly promoted VP1-induced T cell proliferation and cytotoxic T lymphocyte (CTL) responses in the spleens. More importantly, ABD-VP1 also elicited higher percentages of protective CD44hi CD62Lhi memory T cells in dLNs and spleens. Consequently, obvious protective effect against viral myocarditis was conferred by ABD-VP1 vaccine compared to the VP1 vaccine, reflected by the less body weight loss, improved cardiac function, alleviated cardiac histomorphological changes and an increased 28-day survival rate. Our results indicated that the ABD might be a promising immune-enhancing regime for vaccine design and development.
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Affiliation(s)
| | - Yan Yue
- Jiangsu Provincial Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Science, Soochow University, Suzhou, China
| | - Sidong Xiong
- Jiangsu Provincial Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Science, Soochow University, Suzhou, China
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Abdellattif MH, Shahbaaz M, Arief MMH, Hussien MA. Oxazinethione Derivatives as a Precursor to Pyrazolone and Pyrimidine Derivatives: Synthesis, Biological Activities, Molecular Modeling, ADME, and Molecular Dynamics Studies. Molecules 2021; 26:molecules26185482. [PMID: 34576953 PMCID: PMC8468439 DOI: 10.3390/molecules26185482] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/28/2021] [Accepted: 08/31/2021] [Indexed: 11/21/2022] Open
Abstract
In this study, we used oxazinethione as a perfect precursor to synthesize new pyrimidine and pyrazole derivatives with potent biological activities. Biological activities were determined for all compounds against A. flavus, E. coli, S. aureus, and F. moniliform. Compounds 3, 4a-b, and 5 exhibited higher activities toward A. flavus, E. coli, S. aureus, and F. moniliform; this was indicated through the MIC (minimum inhibitory concentration). At the same time, anticancer activities were determined through four cell lines, Ovcar-3, Hela, MCF-7, and LCC-MMk. The results obtained indicated that compound 5 was the most potent compound for both cell lines. Molecular docking was studied by the MOE (molecular operating environment). The in silico ADME of compounds 2 and 5 showed good pharmacokinetic properties. The present research strengthens the applicability of these compounds as encouraging anticancer and antibacterial drugs. Moreover, JAGUAR module MD simulations were carried out at about 100 ns. In addition, spectroscopic studies were carried out to establish the reactions of the synthesized structure derivatives.
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Affiliation(s)
- Magda H. Abdellattif
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
- Correspondence: ; Tel.: +966-554156900
| | - Mohd Shahbaaz
- South African Medical Research Council Bioinformatics Institute, University of Western Cape, Private Bag X17, Bellville, Cape Town 7535, South Africa;
- Laboratory of Computational Modelling of Drugs, South Ural State University, 76 Lenin Prospects, 454080 Chelyabinsk, Russia
| | - M. M. H. Arief
- Chemistry Department, Faculty of Science, Benha University, Benha 13511, Egypt;
| | - Mostafa A. Hussien
- Department of Chemistry, Faculty of Science, Port Said University, Port Said 42521, Egypt;
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
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