1
|
Khalid Zia M, Siddiqui T, Ansari S, Muaz M, Ahsan H, Halim Khan F. Insight into the molecular interaction between the anticancer drug, enzalutamide and human alpha-2-macroglobulin: Biochemical and biophysical approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 311:123957. [PMID: 38310741 DOI: 10.1016/j.saa.2024.123957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/21/2024] [Accepted: 01/22/2024] [Indexed: 02/06/2024]
Abstract
The drug pharmacokinetics is affected upon binding with proteins, thus making drug-protein interactions crucial. This study investigated the interaction between enzalutamide and human major antiproteinase alpha-2-macroglobulin (α2M) by using multi spectroscopic and calorimetric techniques. The spectroscopic techniques such as circular dichroism (CD), intrinsic fluorescence, and UV-visible absorption were used to determine the mechanism of enzalutamide-α2M interaction. Studies on the quenching of fluorescence at three different temperatures showed that the enzalutamide-α2M complex is formed through static quenching mechanism. The change in microenvironment around tyrosine residues in protein was detected through synchronised fluorescence. The secondary structure of α2M was slightly altered by enzalutamide according to far UV-CD spectral analysis. Changes in position of amide I band in FTIR spectra further confirm the secondary structural alteration in α2M. According to thermodynamic characteristics such as fluorescence quenching and isothermal titration calorimetry (ITC), hydrogen bonds and hydrophobic interactions were involved in the interaction machanism. The ITC reiterated the exothermic and spontaneous nature of the interaction. The lower proteinase inhibitory activity of the α2M-enzalutamide conjugate as reflects the disruption of the native α2M structure upon interaction with enzalutamide.
Collapse
Affiliation(s)
- Mohammad Khalid Zia
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India
| | - Tooba Siddiqui
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India
| | - Sana Ansari
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India
| | - Mohammad Muaz
- Interdisciplinary Nanotechnology Centre, Aligarh Muslim University, Aligarh 202002, India
| | - Haseeb Ahsan
- Department of Biochemistry, Faculty of Dentistry, Jamia Millia Islamia, New Delhi 110025, India
| | - Fahim Halim Khan
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India.
| |
Collapse
|
2
|
Pejchinovski I, Turkkan S, Pejchinovski M. Recent Advances of Proteomics in Management of Acute Kidney Injury. Diagnostics (Basel) 2023; 13:2648. [PMID: 37627907 PMCID: PMC10453063 DOI: 10.3390/diagnostics13162648] [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: 06/28/2023] [Revised: 07/31/2023] [Accepted: 08/03/2023] [Indexed: 08/27/2023] Open
Abstract
Acute Kidney Injury (AKI) is currently recognized as a life-threatening disease, leading to an exponential increase in morbidity and mortality worldwide. At present, AKI is characterized by a significant increase in serum creatinine (SCr) levels, typically followed by a sudden drop in glomerulus filtration rate (GFR). Changes in urine output are usually associated with the renal inability to excrete urea and other nitrogenous waste products, causing extracellular volume and electrolyte imbalances. Several molecular mechanisms were proposed to be affiliated with AKI development and progression, ultimately involving renal epithelium tubular cell-cycle arrest, inflammation, mitochondrial dysfunction, the inability to recover and regenerate proximal tubules, and impaired endothelial function. Diagnosis and prognosis using state-of-the-art clinical markers are often late and provide poor outcomes at disease onset. Inappropriate clinical assessment is a strong disease contributor, actively driving progression towards end stage renal disease (ESRD). Proteins, as the main functional and structural unit of the cell, provide the opportunity to monitor the disease on a molecular level. Changes in the proteomic profiles are pivotal for the expression of molecular pathways and disease pathogenesis. Introduction of highly-sensitive and innovative technology enabled the discovery of novel biomarkers for improved risk stratification, better and more cost-effective medical care for the ill patients and advanced personalized medicine. In line with those strategies, this review provides and discusses the latest findings of proteomic-based biomarkers and their prospective clinical application for AKI management.
Collapse
Affiliation(s)
- Ilinka Pejchinovski
- Department of Quality Assurance, Nikkiso Europe GmbH, 30885 Langenhagen, Germany; (I.P.); (S.T.)
| | - Sibel Turkkan
- Department of Quality Assurance, Nikkiso Europe GmbH, 30885 Langenhagen, Germany; (I.P.); (S.T.)
| | - Martin Pejchinovski
- Department of Analytical Instruments Group, Thermo Fisher Scientific, 82110 Germering, Germany
| |
Collapse
|
3
|
Potential anti-cancer effects of hibernating common carp (Cyprinus carpio) plasma on B16-F10 murine melanoma: In vitro and in vivo studies. Int J Biol Macromol 2023; 238:124058. [PMID: 36931484 DOI: 10.1016/j.ijbiomac.2023.124058] [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: 04/23/2022] [Revised: 03/12/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023]
Abstract
Melanoma is the major type of skin cancer, which its treatment is still a challenge in the world. In recent years, interest in hibernation-based therapeutic approaches for various biomedical applications has been increased. Many studies indicated that some factors in the blood plasma of hibernating animals such as alpha-2-macroglobulin (A2M) cause anti-proliferative effects. Considering that, the present study was conducted to investigate the anti-cancer effects of hibernating common carp plasma (HCCP) on murine melanoma (B16-F10) in vitro and in vivo. The effect of HCCP on cell viability, migration, apoptosis rate, and cell cycle distribution of B16-F10 cells, tumor growth, and rate of survival were evaluated. To investigate the role of A2M in the anti-cancer effects of HCCP, the gene of interest and proteins in HCCP and non-hibernating common carp plasma (NHCCP) were evaluated by quantitative reverse transcription-polymerase chain reaction (qRT-PCR) assay as well as sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and mass spectrometry analysis. Based on our findings, HCCP significantly decreased B16-F10 cell viability. Moreover, HCCP caused morphological alternations, inhibition of migration, induction of apoptosis, and significantly induced the cell cycle arrest at the G2/M phase. In addition, A2M level was significantly increased in HCCP compared with NHCCP. Taken together, our findings suggested that HCCP had the potential to be a promising novel therapeutic target for cancer treatment because of its anti-cancer properties.
Collapse
|
4
|
Exploring the interaction of myricetin with human alpha-2-macroglobulin: biophysical and in-silico analysis. J Biol Phys 2023; 49:29-48. [PMID: 36662317 PMCID: PMC9867608 DOI: 10.1007/s10867-022-09621-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 12/26/2022] [Indexed: 01/21/2023] Open
Abstract
Myricetin (MYR) is a bioactive secondary metabolite found in plants that is recognized for its nutraceutical value and is an essential constituent of various foods and beverages. It is reported to exhibit a plethora of activities, including antioxidant, antimicrobial, antidiabetic, anticancer, and anti-inflammatory. Alpha-2-macroglobulin (α2M) is a major plasma anti-proteinase that can inhibit proteinases of both human and non-human origin, regardless of their specificity and catalytic mechanism. Here, we explored the interaction of MYR-α2M using various biochemical and biophysical techniques. It was found that the interaction of MYR brings subtle change in its anti-proteolytic potential and thereby alters its structure and function, as can be seen from absorbance and fluorescence spectroscopy. UV spectroscopy of α2M in presence of MYR indicated the occurrence of hyperchromism, suggesting complex formation. Fluorescence spectroscopy reveals that MYR reduces the fluorescence intensity of native α2M with a shift in the wavelength maxima. At 318.15 K, MYR binds to α2M with a binding constant of 2.4 × 103 M-1, which indicates significant binding. The ΔG value was found to be - 7.56 kcal mol-1 at 298.15 K, suggesting the interaction to be spontaneous and thermodynamically favorable. The secondary structure of α2M does not involve any major change as was confirmed by CD analysis. The molecular docking indicates that Asp-146, Ser-172, Glu-174, and Tyr-180 were the key residues involved in α2M-MYR complex formation. This study contributes to our understanding of the function and mechanism of protein and flavonoid binding by providing a molecular basis of the interaction between MYR and α2M.
Collapse
|
5
|
Zia MK, Siddiqui T, Ahsan H, Khan FH. Comprehensive insight into the molecular interaction of an anticancer drug-ifosfamide with human alpha-2-macroglobulin: biophysical and in silico studies. J Biomol Struct Dyn 2022; 40:3907-3916. [PMID: 33267704 DOI: 10.1080/07391102.2020.1852115] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Ifosfamide is an active alkylating chemotherapeutic drug chemically related to nitrogen mustard. The pharmacokinetics of drugs is affected upon binding with protein, making the studies on drug-protein interaction promising. The present study investigates the interaction between ifosfamide and human antiproteinase-alpha-2-macroglobulin (α2M) by using multi-spectroscopic and in silico techniques. The UV-visible absorption, intrinsic fluorescence and circular dichroism (CD) spectroscopic methods were employed to unveil the mode and mechanism of ifosfamide-α2M interaction. Fluorescence quenching studies performed at three different temperatures indicated that ifosfamide-α2M complex formation involves static quenching. Far UV-CD spectra revealed a minor alteration in the secondary structure of α2M instigated by ifosfamide. The thermodynamic parameters determined by fluorescence quenching experiment and isothermal titration calorimetry (ITC) suggested that the complex between ifosfamide and α2M involves hydrogen bonding and hydrophobic interactions. Molecular docking illustrates that ifosfamide binds with moderate affinity to Lys1240, Asn173, Ser957, Leu955, Asp953, Lys1216 and Thr1236 residues during the interaction. Molecular dynamic (MD) simulation suggested that the ifosfamide forms a stable complex with α2M. Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Mohammad Khalid Zia
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Tooba Siddiqui
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Haseeb Ahsan
- Faculty of Dentistry, Department of Biochemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi, India
| | - Fahim Halim Khan
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| |
Collapse
|
6
|
Jourdi G, Abdoul J, Siguret V, Decleves X, Frezza E, Pailleret C, Gouin-Thibault I, Gandrille S, Neveux N, Samama CM, Pasquali S, Gaussem P. Induced forms of α 2-macroglobulin neutralize heparin and direct oral anticoagulant effects. Int J Biol Macromol 2021; 184:209-217. [PMID: 34126147 DOI: 10.1016/j.ijbiomac.2021.06.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 10/21/2022]
Abstract
Alpha2-macroglobulin (α2M) is a physiological macromolecule that facilitates the clearance of many proteinases, cytokines and growth factors in human. Here, we explored the effect of induced forms of α2M on anticoagulant drugs. Gla-domainless factor Xa (GDFXa) and methylamine (MA)-induced α2M were prepared and characterized by electrophoresis, immunonephelometry, chromogenic, clot waveform and rotational thromboelastometry assays. Samples from healthy volunteers and anticoagulated patients were included. In vivo neutralization of anticoagulants was evaluated in C57Bl/6JRj mouse bleeding-model. Anticoagulant binding sites on induced α2M were depicted by computer-aided energy minimization modeling. GDFXa-induced α2M neutralized dabigatran and heparins in plasma and whole blood. In mice, a single IV dose of GDFXa-induced α2M following anticoagulant administration significantly reduced blood loss and bleeding time. Being far easier to prepare, we investigated the efficacy of MA-induced α2M. It neutralized rivaroxaban, apixaban, dabigatran and heparins in spiked samples in a concentration-dependent manner and in samples from treated patients. Molecular docking analysis evidenced the ability of MA-induced α2M to bind non-covalently these compounds via some deeply buried binding sites. Induced forms of α2M have the potential to neutralize direct oral anticoagulants and heparins, and might be developed as a universal antidote in case of major bleeding or urgent surgery.
Collapse
Affiliation(s)
- Georges Jourdi
- Université de Paris, Innovative Therapies in Haemostasis, INSERM UMR_S1140, F-75006, Paris, France; AP-HP. Centre-Université de Paris, Hôpital Cochin, F-75014, Paris, France; Research Centre, Montreal Heart Institute, University of Montreal, Faculty of Pharmacy, Montreal, Canada.
| | - Johan Abdoul
- Université de Paris, Innovative Therapies in Haemostasis, INSERM UMR_S1140, F-75006, Paris, France
| | - Virginie Siguret
- Université de Paris, Innovative Therapies in Haemostasis, INSERM UMR_S1140, F-75006, Paris, France; AP-HP. Nord-Université de Paris, Hôpital Lariboisière, F-75010 Paris, France
| | - Xavier Decleves
- AP-HP. Centre-Université de Paris, Hôpital Cochin, F-75014, Paris, France; Université de Paris, Variabilité de réponse aux psychotropes, INSERM UMR_S1144, F-75006 Paris, France
| | - Elisa Frezza
- Laboratoire CiTCoM, Université de Paris, CNRS, F-75006 Paris, France
| | - Claire Pailleret
- Université de Paris, Innovative Therapies in Haemostasis, INSERM UMR_S1140, F-75006, Paris, France; Clinique du Mont Louis, F-75011 Paris, France
| | - Isabelle Gouin-Thibault
- Laboratoire d'hématologie, CHU Pontchaillou, Université de Rennes 1, CIC-Inserm1414, F-35000 Rennes, France
| | - Sophie Gandrille
- Université de Paris, Innovative Therapies in Haemostasis, INSERM UMR_S1140, F-75006, Paris, France; AP-HP. Centre-Université de Paris, Hôpital Européen Georges Pompidou, F-75015 Paris, France
| | - Nathalie Neveux
- AP-HP. Centre-Université de Paris, Hôpital Cochin, F-75014, Paris, France
| | - Charles Marc Samama
- Université de Paris, Innovative Therapies in Haemostasis, INSERM UMR_S1140, F-75006, Paris, France; AP-HP. Centre-Université de Paris, Hôpital Cochin, F-75014, Paris, France
| | - Samuela Pasquali
- Laboratoire CiTCoM, Université de Paris, CNRS, F-75006 Paris, France
| | - Pascale Gaussem
- Université de Paris, Innovative Therapies in Haemostasis, INSERM UMR_S1140, F-75006, Paris, France; AP-HP. Centre-Université de Paris, Hôpital Européen Georges Pompidou, F-75015 Paris, France.
| |
Collapse
|
7
|
Antipsychotic clozapine binding to alpha-2-macroglobulin protects interacting partners against oxidation and preserves the anti-proteinase activity of the protein. Int J Biol Macromol 2021; 183:502-512. [PMID: 33930446 DOI: 10.1016/j.ijbiomac.2021.04.155] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/23/2021] [Accepted: 04/24/2021] [Indexed: 12/20/2022]
Abstract
In this study, the interaction between clozapine, an atypical antipsychotic drug, and alpha-2-macroglobulin (α2M), a multipurpose anti-proteinase, was investigated under simulated (patho) physiological conditions using multiple spectroscopic techniques and molecular modeling. It was found that α2M binds clozapine with a moderate affinity (the binding constant of 0.9 × 105 M-1 at 37 °C). The preferable binding site for both clozapine's atropisomers was revealed to be a large pocket at the interface of C and D monomer subunits of the protein. Hydrogen bonds and the hydrophobic effect were proposed as dominant forces in complex formation. The binding of clozapine did not induce significant conformational change of the protein, as confirmed by virtually unaltered α2M secondary structure and anti-proteinase activity. However, both clozapine and α2M shielded each other from the deleterious influence of strong oxidants: sodium hypochlorite and 2,2'-azobis-2-methyl-propanimidamide dihydrochloride (AAPH). Moreover, clozapine in a concentration range that is usually targeted in the plasma during patients' treatment effectively protected the anti-proteinase activity of α2M under AAPH-induced free radical overproduction. Our results suggest that the cooperation between α2M and clozapine may be a path by which these two molecules synergistically protect neural tissue against injury caused by disturbed proteostasis or oxidative stress.
Collapse
|
8
|
Zia MK, Siddiqui T, Ahsan H, Khan FH. Characterization of the binding between anti-tumor drug 5-fluorouracil and human alpha-2-macroglobulin: spectroscopic and molecular docking analyses. J Biomol Struct Dyn 2021; 40:7949-7959. [PMID: 33798029 DOI: 10.1080/07391102.2021.1905550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
5-Fluorouracil (5-FU) is a well-recognized anticancer drug used in the treatment of tumors of head, neck and breast. Drug pharmacokinetics is affected upon binding with protein, thus, making drug-protein interactions imperative to study. Present work investigates the interaction between 5-FU and human major antiproteinase-alpha-2-macroglobulin (α2M) by multi-spectroscopic, calorimetric and molecular docking techniques. UV/Visible absorption, intrinsic fluorescence and circular dichroism (CD) spectroscopic methods have been employed to unveil the mode and mechanism of 5-FU-α2M interaction. Synchronous fluorescence showed alteration in the microenvironment of tryptophan and tyrosine residues of protein. Far UV-CD spectra suggest slight alterations in the secondary structure of α2M by 5-FU. Thermodynamic parameters determined by fluorescence quenching experiments and isothermal titration calorimetry (ITC) suggested the involvement of hydrogen bonds and hydrophobic interactions. Moreover, ITC corroborate the spontaneous and exothermic nature of the interaction process. Molecular docking illustrates that 5-FU binds with moderate affinity and Asp953, Tyr1264, Lys1236, Thr1232, Tyr1323 and Leu951 were the main residues involved. Molecular dynamics simulation studies suggested that 5-FU was stabilizing the α2M structure and forming a stable complex. It was concluded that 5-FU lower the antiproteolytic activity of α2M significantly and causes disruption in the native structure and conformation of α2M.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Mohammad Khalid Zia
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Tooba Siddiqui
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Haseeb Ahsan
- Department of Biochemistry, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, India
| | - Fahim Halim Khan
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| |
Collapse
|
9
|
Dixit S, Zia MK, Siddiqui T, Ahsan H, Khan FH. Interaction of organophosphate pesticide chlorpyrifos with alpha-2-macroglobulin: Biophysical and molecular docking approach. J Immunoassay Immunochem 2021; 42:138-153. [PMID: 33086912 DOI: 10.1080/15321819.2020.1837161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Organophosphate class of pesticides causes neurotoxicity and carcinogenicity in humans. Once inside the human body, these pesticides often interact with plasma proteins, such as alpha-2-macroglobulin (α2M) which is the key anti-proteinase. Our work focuses on the structural and functional alteration of α2M by chlorpyrifos (CPF), a member of organophosphates. We explored the binding interaction between alpha-2-macroglobulin and CPF by using UV absorption and fluorescence spectroscopy (steady state and synchronous), circular dichroism and molecular docking approach. The functional activity of α2M was analyzed by anti-proteinase trypsin inhibitory assay which showed dose-dependent decrease in alpha-2-macroglobulin antiproteolytic potential. UV absorption studies and fluorescence quenching experiments suggested the formation of a complex between α2M and CPF. The CD spectra suggested a reduction in the beta helical (β helix) content of α2M. Analysis of thermodynamic parameters suggested the process is spontaneous and endothermic with the ΔG and ΔH values being -5.501 kJ/mol, 11.49 kJ/mol, respectively. CPF binds with Ile-1390, Pro-1391, Leu-1392, Lys-1393, Val-1396, Lys-1397, Arg-1407, Thr-1408, Glu-1409, Val-1410, Asp-282, Glu-281 of α2M as suggested by molecular docking.
Collapse
Affiliation(s)
- Swati Dixit
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Mohammad Khalid Zia
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Tooba Siddiqui
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Haseeb Ahsan
- Faculty of Dentistry, Department of Biochemistry, Jamia Millia Islamia, New Delhi, India
| | - Fahim Halim Khan
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| |
Collapse
|
10
|
Integrated multi-spectroscopic and molecular modeling techniques to study the formation mechanism of hidden zearalenone in maize. Food Chem 2021; 351:129286. [PMID: 33640771 DOI: 10.1016/j.foodchem.2021.129286] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/13/2021] [Accepted: 02/01/2021] [Indexed: 02/06/2023]
Abstract
Hidden mycotoxins have been reported to be "protected" by macromolecular substances to escape routine determination, but release to free mycotoxins under gastrointestinal conditions. Nowadays, the hidden zearalenone (ZEN) that binding with macromolecular zein has been found in maize. However, the binding mechanism of ZEN with zein in maize has not been clarified. In this study, the formation of ZEN-zein complex was investigated applying ultrafiltration, multi-spectroscopic and molecular modeling techniques. The steady-state and transient fluorescence analysis suggested the ZEN could interact with zein to form the complex driven by hydrophobic force and hydrogen bonds, which is in accordance with the molecular modeling studies. The conformational changes of zein induced by binding with ZEN were revealed by Fourier transform infrared spectroscopy (FTIR) and circular dichroism (CD). Elucidating the binding mechanism between zein and ZEN could help the development of detecting hidden ZEN and guarantee the safety of maize products.
Collapse
|
11
|
Fang SH, Li YF, Jiang JR, Chen P. Relationship of α2-Macroglobulin with Steroid-Induced Femoral Head Necrosis: A Chinese Population-Based Association Study in Southeast China. Orthop Surg 2020; 11:481-486. [PMID: 31243924 PMCID: PMC6595108 DOI: 10.1111/os.12492] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 05/08/2019] [Accepted: 05/19/2019] [Indexed: 02/02/2023] Open
Abstract
Objective The present study aimed to identify the relationship of α‐2‐macroglobulin and microvascular vessel pathology with steroid‐induced femoral head necrosis in the Southeast Chinese population. Methods This study enrolled 40 patients diagnosed with steroid‐induced necrosis of the femoral head. Patients had various stages of femoral head necrosis. The differential expression of serum proteins and mRNA from patients with steroid‐induced necrosis of the femoral head (SINFH) and healthy volunteers was analyzed by western blot and quantitative polymerase chain reaction (QT‐PCR). The pathological change in osteocyte necrosis was indicated by hematoxylin and eosin stain and immunohistochemistry. Results Hematoxylin and eosin stain showed histopathology changes in the necrotic area of patients with steroid‐induced INFH: bone trabeculae were fewer and thinner, became broken, fragmented and structurally disordered; intraosseous adipose cells became enlarged; the arrangement of the osteoblasts became irregular; and vacant bone lacunae increased. QT‐PCR showed significantly lower levels of α‐2‐macroglobulin in the serum of patients with SINFH than in controls (P < 0.05). Immunohistochemical staining and western blotting demonstrated that the expression of α‐2‐macroglobulin was significantly decreased in the necrotic area of SINFH patients (P < 0.05). Conclusion The α‐2‐macroglobulin may be associated with the pathology of SINFH. The multiple pathological reactions occur in SINFH and α‐2‐macroglobulin may serve as a potential biomarker for the diagnosis of SINFH or a promising therapeutic target.
Collapse
Affiliation(s)
- Shan-Hong Fang
- Department of Orthopaedics, First Affiliated Hospital of Fujian Medical University, Fuzhou City, China
| | | | - Jia-Run Jiang
- Department of Orthopaedics, The Hospital of Changle District, Fuzhou City, China
| | - Peng Chen
- Department of Orthopaedics, First Affiliated Hospital of Fujian Medical University, Fuzhou City, China
| |
Collapse
|
12
|
Siddiqui T, Zia MK, Ali SS, Ahsan H, Khan FH. Investigating hydrogen peroxide induced damage to alpha-2-macroglobulin: Biophysical and thermodynamic study. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.06.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
13
|
Understanding the binding interaction between methotrexate and human alpha-2-macroglobulin: Multi-spectroscopic and computational investigation. Arch Biochem Biophys 2019; 675:108118. [DOI: 10.1016/j.abb.2019.108118] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 09/21/2019] [Accepted: 09/24/2019] [Indexed: 11/17/2022]
|
14
|
Siddiqui T, Zia MK, Ahsan H, Khan FH. Quercetin-induced inactivation and conformational alterations of alpha-2-macroglobulin: multi-spectroscopic and calorimetric study. J Biomol Struct Dyn 2019; 38:4107-4118. [PMID: 31543004 DOI: 10.1080/07391102.2019.1671232] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Quercetin is a widely used bioflavonoid found in onions, grapes, berries and citrus fruits. Under certain conditions, quercetin acts as a pro-oxidant thereby generating reactive oxygen species and promoting the oxidation of molecules. Our study investigates the effect of quercetin on the structure and function of alpha-2-macroglobulin (α2M) by employing various biophysical techniques and trypsin inhibitory assay. α2M is the major antiproteinase present in the plasma of vertebrates. Results of activity assay indicated that α2M loses its 56% of inhibitory activity on treatment with quercetin in the presence of light. UV spectroscopy reveals hyper chromaticity in absorption spectra of protein on interaction with quercetin suggesting structural change. The intrinsic fluorescence studies showed quenching of α2M spectra in the presence of quercetin, and the mode of quenching was found to be static in nature. Synchronous fluorescence indicated the alteration in the microenvironment of tryptophan residues. CD and FTIR spectroscopy confirms concentration-dependent alterations in secondary structure of α2M instigated by quercetin. The magnitude of binding constant, enthalpy change, entropy change and free energy change during the interaction process was determined by isothermal titration calorimetry. Hydrogen bonding and hydrophobic interaction were the main intermolecular forces involved during the process. This study identifies and signifies the damage induced by quercetin to α2M due to its pro-oxidant action. Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Tooba Siddiqui
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Mohammad Khalid Zia
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Haseeb Ahsan
- Department of Biochemistry, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, India
| | - Fahim Halim Khan
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| |
Collapse
|
15
|
Inactivation of Alpha-2-Macroglobulin by Photo-Illuminated Gallic Acid. J Fluoresc 2019; 29:969-979. [DOI: 10.1007/s10895-019-02410-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 07/02/2019] [Indexed: 12/29/2022]
|
16
|
Zia MK, Siddiqui T, Ali SS, Ahsan H, Khan FH. Deciphering the binding of dutasteride with human alpha-2-macroglobulin: Molecular docking and calorimetric approach. Int J Biol Macromol 2019; 133:1081-1089. [DOI: 10.1016/j.ijbiomac.2019.04.180] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 04/26/2019] [Accepted: 04/26/2019] [Indexed: 10/26/2022]
|
17
|
Ali SS, Zia MK, Siddiqui T, Ahsan H, Khan FH. Biophysical analysis of interaction between curcumin and alpha-2-macroglobulin. Int J Biol Macromol 2019; 128:385-390. [DOI: 10.1016/j.ijbiomac.2019.01.136] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 01/24/2019] [Accepted: 01/24/2019] [Indexed: 12/24/2022]
|
18
|
Zia MK, Siddiqui T, Ali SS, Ahsan H, Khan FH. Exploring the interaction of anti-androgen drug-bicalutamide with human alpha-2-macroglobulin: A biophysical investigation. Int J Biol Macromol 2018; 120:2285-2292. [DOI: 10.1016/j.ijbiomac.2018.08.117] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 08/17/2018] [Accepted: 08/23/2018] [Indexed: 11/17/2022]
|