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Bangar NS, Ravindran S, Shaikh SA, Shah N, Tupe RS. Homeopathic Formulations of Syzygium jambolanum Alleviate Glycation-Mediated Structural and Functional Modifications of Albumin: Evaluation through Multi-Spectroscopic and Microscopic Approaches. HOMEOPATHY 2024; 113:98-111. [PMID: 37857331 DOI: 10.1055/s-0043-1771024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
BACKGROUND The growing interest in identifying the mode of action of traditional medicines has strengthened its research. Syzygium jambolanum (Syzyg) is commonly prescribed in homeopathy and is a rich source of phytochemicals. OBJECTIVE The present study aims to shed light on the anti-glycation molecular mechanism of Syzyg mother tincture (MT), 30c, and 200c on glycated human serum albumin (HSA) by multi-spectroscopic and microscopic approaches. METHODS The phytochemicals and antioxidant potential of the Syzyg formulations were estimated by the high-performance liquid chromatography and spectroscopic technique, respectively. Glycation was initiated by incubating HSA with methylglyoxal, three Syzyg formulations, and the known inhibitor aminoguanidine in separate tubes at 37°C for 48 hours. The formation of glycation adducts was assessed by spectrofluorometer and affinity chromatography. The structural modifications were analyzed through circular dichroism, Fourier transform infrared spectroscopy, turbidity, 8-anilinonapthalene-1-sulfonic acid fluorescence, and nuclear magnetic resonance. Further, the formation of the aggregates was examined by thioflavin T, native-polyacrylamide gel electrophoresis, and transmission electron microscopy. Additionally, the functional modifications of glycated HSA were determined by esterase-like activity and antioxidant capacity. The binding analysis of Syzyg formulations with glycated HSA was evaluated by surface plasmon resonance (SPR). RESULTS Syzyg formulations MT, 30c, and 200c contained gallic acid and ellagic acid as major phytochemicals, with concentrations of 16.02, 0.86, and 0.52 µg/mL, and 227.35, 1.35, and 0.84 µg/mL, respectively. Additionally, all three formulations had remarkable radical scavenging ability and could significantly inhibit glycation compared with aminoguanidine. Further, Syzyg formulations inhibited albumin's structural and functional modifications. SPR data showed that Syzyg formulations bind to glycated HSA with an equilibrium dissociation constant of 1.10 nM. CONCLUSION Syzyg formulations inhibited the glycation process while maintaining the structural and functional integrity of HSA.
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Affiliation(s)
- Nilima S Bangar
- Symbiosis School of Biological Sciences, Symbiosis International (Deemed University), Lavale, Pune, Maharashtra, India
| | - Selvan Ravindran
- Symbiosis School of Biological Sciences, Symbiosis International (Deemed University), Lavale, Pune, Maharashtra, India
| | - Shamim A Shaikh
- Rajiv Gandhi Institute of IT and Biotechnology, Bharati Vidyapeeth (Deemed to be University), Katraj, Pune, Maharashtra, India
| | - Nilesh Shah
- Department of Surgery and Homeopathic Therapeutics, Bharati Vidyapeeth (Deemed to be University), Homoeopathic Medical College, Katraj, Pune, Maharashtra, India
| | - Rashmi S Tupe
- Symbiosis School of Biological Sciences, Symbiosis International (Deemed University), Lavale, Pune, Maharashtra, India
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Soares MAG, de Aquino PA, Costa T, Serpa C, Chaves OA. Insights into the effect of glucose on the binding between human serum albumin and the nonsteroidal anti-inflammatory drug nimesulide. Int J Biol Macromol 2024; 265:131148. [PMID: 38547949 DOI: 10.1016/j.ijbiomac.2024.131148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 03/04/2024] [Accepted: 03/25/2024] [Indexed: 04/01/2024]
Abstract
Glucose interacts with human serum albumin (HSA, the main protein responsible for the biodistribution of drugs in the bloodstream) and consequently affects the binding capacity of exogenous compounds. Thus, in this work, the interactive profile between HSA and the anti-inflammatory drug nimesulide (NMD, used mainly by patients with diabetic neuropathy to relieve acute or chronic pains) was characterized in nonglycemic, normoglycemic (80 mg/dL), and hyperglycemic (320 mg/dL) conditions by biophysics techniques. There is a spontaneous and ground-state association HSA:NMD under physiological conditions. Therefore, the Stern-Volmer constant (Ksv) can also be used to estimate the binding affinity. The Ksv values for nonglycemic, normoglycemic, and hyperglycemic conditions are around 104 M-1, indicating a moderate affinity of NMD to albumin that was slightly improved by glucose levels. Additionally, the binding is enthalpically and entropically driven mainly into subdomains IIA or IIIA. The binding perturbs weakly the α-helix content of albumin, however, glucose potentially stabilizes the tertiary structure, decreasing the structural perturbation upon NMD binding and improves the complex HSA:NMD stability. Overall, the biophysical characterization indicated that glucose levels might slightly positively impact the pharmacokinetic profile of NMD, allowing NMD to achieve its therapeutical potential without affecting drastically its effective dosages.
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Affiliation(s)
- Marilia Amável Gomes Soares
- Comissão Brasileira de Energia Nuclear, Instituto de Engenharia Nuclear, Laboratório de Nanoradiofármacos e Síntese de Novos Radiofármacos, 21941906 Rio de Janeiro, Brazil.
| | - Paloma Anorita de Aquino
- Departamento de Ciências Farmacêuticas, Universidade Federal Rural do Rio de Janeiro, 23890-000 Seropédica, Rio de Janeiro, Brazil
| | - Telma Costa
- CQC-IMS, Departamento de Química, Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal
| | - Carlos Serpa
- CQC-IMS, Departamento de Química, Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal
| | - Otávio Augusto Chaves
- CQC-IMS, Departamento de Química, Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal; Laboratório de Imunofarmacologia, Centro de Pesquisa, Inovação e Vigilância em COVID-19 e Emergências Sanitárias (CPIV), Instituto Oswaldo Cruz (IOC), Fundação Oswaldo Cruz (Fiocruz), 21040-361 Rio de Janeiro, RJ, Brazil.
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Zambre S, Bangar N, Mistry A, Katarmal P, Khan MS, Ahmed I, Tupe R, Roy B. Aldosterone, Methylglyoxal, and Glycated Albumin Interaction with Macrophage Cells Affects Their Viability, Activation, and Differentiation. ACS OMEGA 2024; 9:11848-11859. [PMID: 38497023 PMCID: PMC10938338 DOI: 10.1021/acsomega.3c09420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 02/06/2024] [Accepted: 02/13/2024] [Indexed: 03/19/2024]
Abstract
BACKGROUND The inflammatory response in diabetes is strongly correlated with increasing amounts of advanced glycation end products (AGEs), methylglyoxal (MGO), aldosterone (Aldo), and activation of macrophages. Aldo is known to be associated with increased pro-inflammatory responses in general, but its significance in inflammatory responses under glycated circumstances has yet to be understood. In the current work, the aim of our study was to study the macrophage immune response in the presence of AGEs, MGO, and Aldo to comprehend their combined impact on diabetes-associated complications. METHODS AND RESULTS The viability of macrophages upon treatment with glycated HSA (Gly-HSA) promoted cell growth as the concentration increased from 100 to 500 μg/mL, whereas MGO at a high concentration (≥300 μM) significantly hampered cell growth. At lower concentrations (0.5-5 nM), Aldo strongly promoted cell growth, whereas at higher concentrations (50 nM), it was seen to inhibit growth when used for cell treatment for 24 h. Aldo had no effect on MGO-induced cell growth inhibition after 24 h of treatment. However, compared to MGO or Aldo treatment alone, an additional decrease in viability could be seen after 48 h of treatment with a combination of MGO and Aldo. Treatment with Aldo and MGO induced expression of TNF-α independently and when combined. However, when combined, Aldo and MGO significantly suppressed the expression of TGF-β. Aldo, Gly-HSA, and MGO strongly induced the transcription of NF-κB and RAGE mRNA and, as expected, also promoted the formation of reactive oxygen species. Also, by inducing iNOS and MHC-II and suppressing CD206 transcript expression, Gly-HSA strongly favored the differentiation of macrophages into M1 type (pro-inflammatory). On the other hand, the combination of Aldo and MGO strongly induced the expression of MHC-II, CD206, and ARG1 (M2 macrophage marker). These findings suggest that Gly-HSA, MGO, and Aldo differently influence macrophage survival, activation, and differentiation. CONCLUSIONS Overall, this study gives an insight into the effects of glycated protein and MGO in the presence of Aldo on macrophage survival, activation, differentiation, and inflammatory response.
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Affiliation(s)
- Saee Zambre
- Symbiosis
School of Biological Sciences (SSBS), Symbiosis
International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
| | - Nilima Bangar
- Symbiosis
School of Biological Sciences (SSBS), Symbiosis
International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
| | - Armaan Mistry
- Symbiosis
School of Biological Sciences (SSBS), Symbiosis
International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
| | - Poonam Katarmal
- Symbiosis
School of Biological Sciences (SSBS), Symbiosis
International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
| | - Mohd Shahnawaz Khan
- Department
of Biochemistry, College of Science, King
Saud University, Riyadh 11451, Saudi Arabia
| | - Irshad Ahmed
- Department
of Biochemistry and Structural Biology, School of Medicine, UT Health Science Center, San Antonio, Texas 78229, United States
| | - Rashmi Tupe
- Symbiosis
School of Biological Sciences (SSBS), Symbiosis
International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
| | - Bishnudeo Roy
- Symbiosis
School of Biological Sciences (SSBS), Symbiosis
International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India
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Martinez Pomier K, Ahmed R, Huang J, Melacini G. Inhibition of toxic metal-alpha synuclein interactions by human serum albumin. Chem Sci 2024; 15:3502-3515. [PMID: 38455030 PMCID: PMC10915811 DOI: 10.1039/d3sc06285f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 01/12/2024] [Indexed: 03/09/2024] Open
Abstract
Human serum albumin (HSA), the most abundant protein in plasma and cerebrospinal fluid, not only serves as a crucial carrier of various exogenous and endogenous ligands but also modulates the aggregation of amyloidogenic proteins, including alpha synuclein (αSyn), which is associated with Parkinson's disease and other α-synucleinopathies. HSA decreases αSyn toxicity through the direct binding to monomeric and oligomeric αSyn species. However, it is possible that HSA also sequesters metal ions that otherwise promote aggregation. Cu(ii) ions, for example, enhance αSyn fibrillization in vitro, while also leading to neurotoxicity by generating reactive oxygen species (ROS). However, it is currently unclear if and how HSA affects Cu(ii)-binding to αSyn. Using an integrated set of NMR experiments, we show that HSA is able to chelate Cu(ii) ions from αSyn more efficiently than standard chelators such as EDTA, revealing an unexpected cooperativity between the HSA metal-binding sites. Notably, fatty acid binding to HSA perturbs this cooperativity, thus interfering with the sequestration of Cu(ii) ions from αSyn. We also observed that glycation of HSA diminished Cu(ii)-binding affinity, while largely preserving the degree of cooperativity between the HSA metal-binding sites. Additionally, our results show that Cu(ii)-binding to HSA stabilizes the interactions of HSA with αSyn primarily at two different regions, i.e. the N-terminus, Tyr 39 and the majority of the C-terminus. Our study not only unveils the effect of fatty acid binding and age-related posttranslational modifications, such as glycation, on the neuroprotective mechanisms of HSA, but also highlights the potential of αSyn as a viable NMR-based sensor to investigate HSA-metal interactions.
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Affiliation(s)
| | - Rashik Ahmed
- Department of Chemistry and Chemical Biology, McMaster University ON L8S 4M1 Canada
| | - Jinfeng Huang
- Department of Chemistry and Chemical Biology, McMaster University ON L8S 4M1 Canada
| | - Giuseppe Melacini
- Department of Chemistry and Chemical Biology, McMaster University ON L8S 4M1 Canada
- Department of Biochemistry and Biomedical Sciences, McMaster University Hamilton ON L8S 4M1 Canada
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Sonpasare K, Lalchandani DS, Chenkual L, Sathala PK, Khatoon R, Porwal PK. Effect of glycation-induced concentration-dependent change in albumin structure and alteration in its binding capacity. J Biomol Struct Dyn 2024:1-10. [PMID: 38381667 DOI: 10.1080/07391102.2024.2316783] [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: 11/20/2023] [Accepted: 02/03/2024] [Indexed: 02/23/2024]
Abstract
Reducing sugars causes confirmatory alterations in albumin structure by the nonenzymatic glycation of the amino group of serum albumin. In this study, glucose and its hazardous metabolic products like glyoxal and methylglyoxal were incubated with bovine serum albumin (BSA). The confirmational changes in BSA molecule's structure by glycating substances was investigated using a variety of spectroscopic methods, including deconvolutionFourier Transform Infra-red (FT-IR) spectroscopy, fluorescence spectroscopy, UV spectroscopy and circular dichroism (CD) spectroscopy. Dynamic fluorescence quenching was observed in the case of glucose, while static quenching was observed in the case of methyl glyoxal and glyoxal. Similarly, employing deconvolution FT-IR spectroscopy and CD spectroscopy for determination of change in secondary structures in terms signature of α-helix, β-turn, β-sheet and random coil modifications. Destabilization or unfolding of the albumin structure, due to the disruption of the hydrogen bonding pattern that stabilizes the albumin manifold, causes a 25-50% reduction in α-helix and a 2-fold increase in β-sheet and turns in glycated BSA. The competitive displacement interaction studies with warfarin were performed using the ultrafiltration technique and quantitative determination of free drug in ultrafiltrate using LC-MS/MS. The binding of carbamazepine (CBZ) or its active metabolite to proteins was unaffected by the glycation of BSA with glucose and methyl glyoxal. Nevertheless, with glyoxal-modified BSA, it changed the binding of selected analytes significantly. Based on in vitro observations and results, it could be anticipated that the serum CBZ concentration variation may be worsened in uncontrolled diabetes circumstances, with an overall variance of 30-40% possible.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Kailas Sonpasare
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research-Guwahati (NIPER-G), Guwahati, Assam, India
| | - Dimple S Lalchandani
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research-Guwahati (NIPER-G), Guwahati, Assam, India
| | - Laltanpuii Chenkual
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research-Guwahati (NIPER-G), Guwahati, Assam, India
| | - Pavan Kumar Sathala
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research-Guwahati (NIPER-G), Guwahati, Assam, India
| | - Raheema Khatoon
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research-Guwahati (NIPER-G), Guwahati, Assam, India
| | - Pawan Kumar Porwal
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research-Guwahati (NIPER-G), Guwahati, Assam, India
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Apte M, Khan MS, Bangar N, Gvalani A, Naz H, Tupe RS. Crosstalk between Aldosterone and Glycation through Rac-1 Induces Diabetic Nephropathy. ACS OMEGA 2023; 8:37264-37273. [PMID: 37841153 PMCID: PMC10568578 DOI: 10.1021/acsomega.3c05085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 09/14/2023] [Indexed: 10/17/2023]
Abstract
Background: Advanced glycation end products (AGEs) interaction with its receptor (RAGE) and aldosterone (Aldo) through the mineralocorticoid receptor (MR) activates Rac-1 and NF-κB independently in diabetic nephropathy (DN). However, the crosstalk of Aldo with AGEs-RAGE is still unresolved. Our study examined the impact of the AGEs-Aldo complex on renal cells and its effect on the RAGE-MR interaction. Methods and results: Glycation of human serum albumin (HSA) (40 mg/mL) with methylglyoxal (10 mM) in the presence of Aldo (100 nM) and aminoguanidine (AG) (100 nM) was performed. Glycation markers such as fructosamine and carbonyl groups and fluorescence of AGEs, pentosidine, and tryptophan followed by protein modification were measured. Renal (HEK-293T) cells were treated with the glycated HSA-Aldo (200 μg/mL) along with FPS-ZM1 and spironolactone antagonists for RAGE and Aldo, respectively, for 24 h. Glycation markers and esRAGE levels were measured. Protein and mRNA levels of RAGE, MR, Rac-1, and NF-κB were estimated. Glycation markers were enhanced with Aldo when albumin was only 14-16% glycated. AGEs-Aldo complex upregulated RAGE, MR, Rac-1 and NF-κB expressions. However, FPS-ZM1 action might have activated the RAGE-independent pathway, further elevating MR, Rac-1, and NF-κB levels. Conclusion: Our study concluded that the presence of Aldo has a significant impact on glycation. In the presence of AGEs-Aldo, RAGE-MR crosstalk exerts inflammatory responses through Rac-1 in DN. Insights into this molecular interplay are crucial for developing novel therapeutic strategies to alleviate DN in the future.
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Affiliation(s)
- Mayura Apte
- Symbiosis
School of Biological Sciences, Symbiosis
International (Deemed University) (SIU), Lavale, Pune, Maharashtra State 412115, India
| | - Mohd Shahnawaz Khan
- Department
of Biochemistry, College of Science, King
Saud University, Riyadh 11451, Saudi Arabia
| | - Nilima Bangar
- Symbiosis
School of Biological Sciences, Symbiosis
International (Deemed University) (SIU), Lavale, Pune, Maharashtra State 412115, India
| | - Armaan Gvalani
- Symbiosis
School of Biological Sciences, Symbiosis
International (Deemed University) (SIU), Lavale, Pune, Maharashtra State 412115, India
| | - Huma Naz
- Department
of Internal Medicine, University of Missouri, Mizzou, Columbia, Missouri65211, United States
| | - Rashmi S. Tupe
- Symbiosis
School of Biological Sciences, Symbiosis
International (Deemed University) (SIU), Lavale, Pune, Maharashtra State 412115, India
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Moosavi R, Alizadeh N. Silver Nanoclusters as Label Free Non-enzymatic Fast Glucose Assay with the Fluorescent Enhancement Signal. J Fluoresc 2023:10.1007/s10895-023-03407-9. [PMID: 37656303 DOI: 10.1007/s10895-023-03407-9] [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: 07/08/2023] [Accepted: 08/16/2023] [Indexed: 09/02/2023]
Abstract
A simple and low-cost green preparation method was used for BSA capped silver nanoclusters (BSA-Ag NCs) as turn on fluorescent probe for glucose. Non-enzymatic fast glucose detection assay with a widest concentration range was proposed which requires neither nanoclusters (NCs) modification nor complicated enzyme immobilization. The DLS analysis, HRTEM patterns, fluorescence and UV-visible measurement well supported the synthesis product. The advantages of the fabricated glucose sensor based on fluorescence increasing of probe compared to other established optical techniques was inspected and summarized as well. The glucose sensor exhibited a high sensitivity, fast response time (in seconds), satisfactory selectivity, well stability (at least two months), low detection limit (31 µmol L- 1) and a wide concentration response (three orders of magnitudes) to glucose between 0.1 and 92 mmol L- 1 as calibration plot. A theoretical model of the sensing mechanism based on the binding interaction of glucose to BSA-Ag NCs is proposed and data fitting demonstrated a good agreement between the experimental and theoretically calculated fluorescence data. The facile preparation and excellent sensing performance of BSA-Ag NCs in the real samples (plasma and juice) make sure that synthesized probe material is a promising candidate for advanced enzyme-free glucose sensing approach.
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Affiliation(s)
- Razieh Moosavi
- Departmentof Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran
| | - Naader Alizadeh
- Departmentof Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
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Paar M, Fengler VH, Reibnegger G, Schnurr K, Waterstradt K, Schwaminger SP, Stauber RE, Oettl K. Determination of binding characteristics as a measure for effective albumin using different methods. Biochim Biophys Acta Gen Subj 2023:130427. [PMID: 37454915 DOI: 10.1016/j.bbagen.2023.130427] [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: 06/29/2023] [Revised: 07/13/2023] [Accepted: 07/13/2023] [Indexed: 07/18/2023]
Abstract
BACKGROUND & AIMS Transport functions of albumin are of clinical and pharmacological interest and are determined by albumin's properties like posttranslational modifications or bound ligands. Both are affected in pathological conditions and in therapeutic grade albumin solutions. The term effective albumin concentration was introduced as a measure of functionally intact albumin. Our aim was to evaluate the impact of ligands and modifications with different approaches as a measure of effective albumin. APPROACH & RESULTS We used a spin labelled fatty acid and dansylsarcosine to characterize binding properties of albumin i) prepared from plasma of patients and healthy control donors, ii) measured directly out of plasma, iii) research grade albumin, iv) in vitro modified albumin, and v) therapeutic infusion solutions before and after removal of stabilizers. Bilirubin is the main determinant for binding function in patients' albumin. In in vitro prepared albumin bound fatty acids correlated with impaired binding. Human nonmercaptalbumin1, not human nonmercaptalbumin2, showed reduced binding properties. Binding and transport function of therapeutic albumin was severely impaired and restored by filtration. Glycation of research grade albumin had no effect on the binding of dansylsarcosine and only a minor effect on fatty acid binding. CONCLUSIONS Our results suggest that effective albumin -in terms of binding properties- is primarily determined by bound ligands and only to a minor extent by posttranslational modifications. Characterizing albumin directly from plasma better reflects the physiological situation whereas in the case of therapeutic grade albumin stabilizers should be removed to make its binding properties accessible.
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Affiliation(s)
- Margret Paar
- Medical University of Graz, Otto Loewi Research Center, Division of Medicinal Chemistry, Neue Stiftingtalstrasse 6, 8010, Graz, Austria
| | - Vera H Fengler
- University of Graz, Institute of Molecular Biosciences, Humboldtstrasse 50, 8010, Graz, Austria
| | - Gilbert Reibnegger
- Medical University of Graz, Otto Loewi Research Center, Division of Medicinal Chemistry, Neue Stiftingtalstrasse 6, 8010, Graz, Austria
| | - Kerstin Schnurr
- MedInnovation GmbH, Wissenschaftsstandort Berlin-Adlershof (WISTA), Groß-Berliner Damm 151, 12487 Berlin, Germany
| | - Katja Waterstradt
- MedInnovation GmbH, Wissenschaftsstandort Berlin-Adlershof (WISTA), Groß-Berliner Damm 151, 12487 Berlin, Germany
| | - Sebastian P Schwaminger
- Medical University of Graz, Otto Loewi Research Center, Division of Medicinal Chemistry, Neue Stiftingtalstrasse 6, 8010, Graz, Austria; BioTechMed-Graz, Mozartgasse 12, 8010 Graz, Austria
| | - Rudolf E Stauber
- Medical University of Graz, Department of Internal Medicine, Division of Gastroenterology and Hepatology, Auenbruggerplatz 15, 8036 Graz, Austria
| | - Karl Oettl
- Medical University of Graz, Otto Loewi Research Center, Division of Medicinal Chemistry, Neue Stiftingtalstrasse 6, 8010, Graz, Austria.
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Gaikwad DD, Bangar NS, Apte MM, Gvalani A, Tupe RS. Mineralocorticoid interaction with glycated albumin downregulates NRF - 2 signaling pathway in renal cells: Insights into diabetic nephropathy. Int J Biol Macromol 2022; 220:837-851. [PMID: 35987363 DOI: 10.1016/j.ijbiomac.2022.08.095] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 06/30/2022] [Accepted: 08/13/2022] [Indexed: 12/20/2022]
Abstract
In diabetic nephropathy, hyperglycemia elevates albumin glycation and also results in increased plasma aldosterone. Both glycation and aldosterone are reported to cause oxidative stress by downregulating the NRF-2 pathway and thereby resulting in reduced levels of antioxidants and glycation detoxifying enzymes. We hypothesize that an interaction between aldosterone and glycated albumin may be responsible for amplified oxidative stress and concomitant renal cell damage. Hence, human serum albumin was glycated by methylglyoxal (MGO) in presence of aldosterone. Different structural modifications of albumin, functional modifications and aldosterone binding were analyzed. HEK-293 T cells were treated with aldosterone+glycated albumin along with inhibitors of receptors for mineralocorticoid (MR) and advanced glycation endproducts (RAGE). Cellular MGO content, antioxidant markers (nitric oxide, glutathione, catalase, superoxide dismutase, glutathione peroxidase), detoxification enzymes (aldose reductase, Glyoxalase I, II), their expression along with NRF-2 and Keap-1 were measured. Aldosterone binds to albumin with high affinity which is static and spontaneous. Cell treatment by aldosterone+glycated albumin increased intracellular MGO, MR and RAGE expression; hampered antioxidant, detoxification enzyme activities and reduced NRF-2, Keap-1 expression. Thus, the glycated albumin-aldosterone interaction and its adverse effect on renal cells were confirmed. The results will help in developing better pharmacotherapeutic strategies for diabetic nephropathy.
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Affiliation(s)
- Deepesh D Gaikwad
- Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University) (SIU), Lavale, Pune, Maharashtra State, India
| | - Nilima S Bangar
- Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University) (SIU), Lavale, Pune, Maharashtra State, India
| | - Mayura M Apte
- Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University) (SIU), Lavale, Pune, Maharashtra State, India
| | - Armaan Gvalani
- Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University) (SIU), Lavale, Pune, Maharashtra State, India
| | - Rashmi S Tupe
- Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University) (SIU), Lavale, Pune, Maharashtra State, India.
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10
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Jacobs M, Geiger MK, Summers SE, DeLuca CP, Zinn KR, Spence DM. Albumin Glycation Affects the Delivery of C-Peptide to the Red Blood Cells. ACS MEASUREMENT SCIENCE AU 2022; 2:278-286. [PMID: 35726250 PMCID: PMC9204818 DOI: 10.1021/acsmeasuresciau.2c00001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/21/2022] [Accepted: 02/22/2022] [Indexed: 06/15/2023]
Abstract
Serum albumin is a prominent plasma protein that becomes modified in hyperglycemic conditions. In a process known as glycation, these modifications can change the structure and function of proteins, which decrease ligand binding capabilities and alter the bioavailability of ligands. C-peptide is a molecule that binds to the red blood cell (RBC) and stimulates the release of adenosine triphosphate (ATP), which is known to participate in the regulation of blood flow. C-peptide binding to the RBC only occurs in the presence of albumin, and downstream signaling cascades only occur when the albumin and C-peptide complex contains Zn2+. Here, we measure the binding of glycated bovine serum albumin (gBSA) to the RBC in conditions with or without C-peptide and Zn2+. Key to these studies is the analytical sample preparation involving separation of BSA fractions with boronate affinity chromatography and characterization of the varying glycation levels with mass spectrometry. Results from this study show an increase in binding for higher % glycation of gBSA to the RBCs, but a decrease in ability to deliver C-peptide (0.75 ± 0.11 nM for 22% gBSA) compared to samples with less glycation (1.22 ± 0.16 nM for 13% gBSA). A similar trend was measured for Zn2+ delivery to the RBC as a function of glycation percentage. When 15% gBSA or 18% gBSA was combined with C-peptide/Zn2+, the derived ATP release from the RBCs significantly increased to 113% or 36%, respectively. However, 26% gBSA with C-peptide/Zn2+ had no significant increase in ATP release from RBCs. These results indicate that glycation of BSA interferes in C-peptide and Zn2+ binding to the RBC and subsequent RBC ATP release, which may have implications in C-peptide therapy for people with type 1 diabetes.
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Affiliation(s)
- Monica
J. Jacobs
- Department
of Comparative Medicine and Integrative Biology, Michigan State University, 784 Wilson Road, East Lansing, Michigan 48824, United States
- Institute
for Quantitative Health Sciences & Engineering, Michigan State University, 775 Woodlot Drive, East Lansing, Michigan 48824, United
States
| | - Morgan K. Geiger
- Department
of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan 48824, United States
- Institute
for Quantitative Health Sciences & Engineering, Michigan State University, 775 Woodlot Drive, East Lansing, Michigan 48824, United
States
| | - Suzanne E. Summers
- Department
of Biomedical Engineering, Michigan State
University, 775 Woodlot
Drive, East Lansing, Michigan 48824, United States
- Institute
for Quantitative Health Sciences & Engineering, Michigan State University, 775 Woodlot Drive, East Lansing, Michigan 48824, United
States
| | - Charles P. DeLuca
- Institute
for Quantitative Health Sciences & Engineering, Michigan State University, 775 Woodlot Drive, East Lansing, Michigan 48824, United
States
| | - Kurt R. Zinn
- Department
of Biomedical Engineering, Michigan State
University, 775 Woodlot
Drive, East Lansing, Michigan 48824, United States
- Institute
for Quantitative Health Sciences & Engineering, Michigan State University, 775 Woodlot Drive, East Lansing, Michigan 48824, United
States
| | - Dana M. Spence
- Department
of Biomedical Engineering, Michigan State
University, 775 Woodlot
Drive, East Lansing, Michigan 48824, United States
- Institute
for Quantitative Health Sciences & Engineering, Michigan State University, 775 Woodlot Drive, East Lansing, Michigan 48824, United
States
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11
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Gupta A, Khursheed M, Arif Z, Badar A, Alam K. Methylglyoxal-induces multiple stable changes in human serum albumin before forming nephrotoxic advanced glycation end-products: Injury demonstration in human embryonic kidney cells. Int J Biol Macromol 2022; 214:252-263. [PMID: 35716786 DOI: 10.1016/j.ijbiomac.2022.06.096] [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: 05/09/2022] [Revised: 06/02/2022] [Accepted: 06/12/2022] [Indexed: 11/05/2022]
Abstract
The minor fraction of methylglyoxal that is not metabolized in healthy humans reacts with macromolecules to form AGEs. In diabetics, the formation of MG is accelerated; its level may be enhanced multifold. The glyoxalase enzymes responsible for the regular and effective clearance of excess methylglyoxal may become defective in diabetes mellitus leading to its retention in cells and plasma. The methylglyoxal-modified-HSA was prepared, characterised by multiple biophysical techniques and biochemical (s) and its damaging effect was examined on embryonic kidney cell line HEK 293. The UV results showed hyperchromicity in MG-modified-HSA while nitroblue tetrazolium and fluorescence data suggested AGEs formation in comparison to control HSA. Upward shift of negative peaks in CD suggested reduction in α-helicity. Accelerated mobility and diffused broad bands observed in native and SDS polyacrylamide gel, respectively suggest neutralization of some of the positive charges on MG-modified-HSA as well as generation of cross-links. As observed by trypan blue assay, MTT, LDH activity assay, acridine orange, propidium iodide, ethidium bromide, 4',6-diamidino-2-phenylindole (DAPI) staining and ROS measurements, the MG-HSA AGEs caused damage to human embryonic kidney cells. The data suggest that MG-HSA AGEs may trigger powerful inflammatory responses at cellular level which might set the stage for nephrotoxicity in diabetics.
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Affiliation(s)
- Akankcha Gupta
- Department of Biochemistry, Jawaharlal Nehru Medical College, Faculty of Medicine, Aligarh Muslim University, Aligarh, U.P., India
| | - Manal Khursheed
- Department of Biochemistry, Jawaharlal Nehru Medical College, Faculty of Medicine, Aligarh Muslim University, Aligarh, U.P., India
| | - Zarina Arif
- Department of Biochemistry, Jawaharlal Nehru Medical College, Faculty of Medicine, Aligarh Muslim University, Aligarh, U.P., India
| | - Asim Badar
- Department of Biochemistry, Jawaharlal Nehru Medical College, Faculty of Medicine, Aligarh Muslim University, Aligarh, U.P., India
| | - Khursheed Alam
- Department of Biochemistry, Jawaharlal Nehru Medical College, Faculty of Medicine, Aligarh Muslim University, Aligarh, U.P., India.
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12
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Comprehensive profiling and kinetic studies of glycated lysine residues in human serum albumin. Anal Bioanal Chem 2022; 414:4861-4875. [PMID: 35538229 DOI: 10.1007/s00216-022-04108-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 04/11/2022] [Accepted: 04/29/2022] [Indexed: 01/09/2023]
Abstract
Lysine residues of proteins slowly react with glucose forming Amadori products. In hyperglycemic conditions, such as diabetes mellitus, this non-enzymatic glycation becomes more pervasive causing severe medical complications. The structure and conformation of a protein predisposes lysine sites to differing reactivity influenced by their steric availability and amino acid microenvironment. The goal of our study was to identify these sites in albumin and measure glycation affinities of lysine residues. We applied a bottom-up approach utilizing a combination of three LC-MS instruments: timsTOF, Orbitrap, and QTRAP. To prove applicability to samples of varying glycemic status, we compared in vitro glycated and non-glycated HSA, as well as diabetic and non-diabetic individual samples. The analysis of lysine glycation affinities based on peptide intensities provide a semi-quantitative approach, as the results depend on the mass spectrometry platform used. We found that glycation levels based on multiple reaction monitoring (MRM) quantitation better reflect individual glycemic status and that the glycation percentage for each site is in linear relation to all other sites. To develop an approach which more accurately reflects glycation affinity, we developed a kinetics model which uses results from stable isotope dilution HPLC-MRM methodology. Through glycation of albumin at different glucose concentrations, we determine the rate constants of glycation for every lysine residue by simultaneous comparative analysis.
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13
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A novel strategy for production of liraglutide precursor peptide and development of a new long-acting incretin mimic. PLoS One 2022; 17:e0266833. [PMID: 35500009 PMCID: PMC9060347 DOI: 10.1371/journal.pone.0266833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 03/29/2022] [Indexed: 11/27/2022] Open
Abstract
Nowadays, a small number of incretin mimics are used to treat type 2 diabetes mellitus (T2DM) due to their longer half-life. The present study aimed to introduce a novel method for producing the liraglutide precursor peptide (LPP) and developing a potentially new incretin mimic. Here, human αB-crystallin (αB-Cry) was ligated to the LPP at the gene level, and the gene construct was expressed in Escherichia coli with a relatively good efficiency. The hybrid protein (αB-lir) was then purified by a precipitation method followed by anion exchange chromatography. After that, the peptide was released from the carrier protein by a chemical cleavage method yielding about 70%. The LPP was then purified by gel filtration chromatography, and HPLC estimated its purity to be about 98%. Also, the molecular mass of the purified peptide was finally confirmed by mass spectroscopy analysis. Assessment of the secondary structures suggested a dominant α-helical structure for the LPP and a β-sheet rich structure for the hybrid protein. The subcutaneous injection of the LPP and the αB-lir hybrid protein significantly reduced the blood sugar levels in healthy and diabetic mice and stimulated insulin secretion. Also, the hybrid protein exerts its bioactivities more effectively than the LPP over a relatively longer period of time. The results of this study suggested a novel method for the easy and cost-effective production of the LPP and introduced a new long-acting incretin mimic that can be potentially used for the treatment of T2DM patients.
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14
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Albumin Binds COVID-19 Spike 1 Subunit and Predicts In-Hospital Survival of Infected Patients—Possible Alteration by Glucose. J Clin Med 2022; 11:jcm11030587. [PMID: 35160039 PMCID: PMC8836760 DOI: 10.3390/jcm11030587] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/17/2022] [Accepted: 01/20/2022] [Indexed: 01/27/2023] Open
Abstract
(1) Background: This study aimed to analyze if the serum albumin levels of hospitalized SARS-CoV-2 (COVID-19) patients on admission could predict <30 days in-hospital all-cause mortality, and if glucose levels on admission affected this predictive ability. (2) Methods: A multicenter retrospective cohort of 1555 COVID-19-infected adult patients from public hospitals of the Madrid community were analyzed. (3) Results: Logistic regression analysis showed increased mortality for ages higher than 49 y. After adjusting for age, comorbidities and on-admission glucose levels, it was found that on-admission serum albumin ≥3.5 g/dL was significantly associated with reduced mortality (OR 0.48; 95%CI:0.36–0.62). There was an inverse concentration-dependent association between on-admission albumin levels and <30 days in-hospital all-cause mortality. However, when on-admission glucose levels were above 125 mg/dL, higher levels of serum albumin were needed to reach an association with survival. In vitro experiments showed that the spike protein S1 subunit of SARS-CoV-2 binds to native albumin. The binding ability of native albumin to the spike protein S1 subunit was decreased in the presence of an increasing concentration of glycated albumin. (4) Conclusions: On-admission serum albumin levels were inversely associated with <30 days in-hospital all-cause mortality. Native albumin binds the spike protein S1 subunit, suggesting that native albumin may act as a scavenger of the SARS-CoV-2 virus.
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15
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Oligomerization, albumin binding and catabolism of therapeutic peptides in the subcutaneous compartment: An investigation on lipidated GLP-1 analogs. J Pharm Biomed Anal 2022; 210:114566. [PMID: 35042144 DOI: 10.1016/j.jpba.2021.114566] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 12/22/2021] [Accepted: 12/28/2021] [Indexed: 11/20/2022]
Abstract
Lipidation, a common strategy to improve half-life of therapeutic peptides, affects their tendency to oligomerize, their interaction with plasmatic proteins, and their catabolism. In this work, we have leveraged the use of NMR and SPR spectroscopy to elucidate oligomerization propensity and albumin interaction of different analogs of the two marketed lipidated GLP-1 agonists liraglutide and semaglutide. As most lipidated therapeutic peptides are administered by subcutaneous injection, we have also assessed in vitro their catabolism in the SC tissue using the LC-HRMS-based SCiMetPep assay. We observed that oligomerization had a shielding effect against catabolism. At the same time, binding to albumin may provide only limited protection from proteolysis due to the higher unbound peptide fraction present in the subcutaneous compartment with respect to the plasma. Finally, identification of catabolites in rat plasma after SC dosing of semaglutide showed a good correlation with the in vitro data, with Tyr19-Leu20 being the major cleavage site. Early characterization of the complex interplay between oligomerization, albumin binding, and catabolism at the injection site is essential for the synthesis of lipidated peptides with good pharmacokinetic profiles.
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16
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Grigoryan H, Imani P, Dudoit S, Rappaport SM. Extending the HSA-Cys34-Adductomics Pipeline to Modifications at Lys525. Chem Res Toxicol 2021; 34:2549-2557. [PMID: 34788011 DOI: 10.1021/acs.chemrestox.1c00311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We previously developed an adductomics pipeline that employed nanoflow liquid chromatography and high-resolution tandem mass spectrometry (nLC-HR-MS/MS) plus informatics to perform an untargeted detection of modifications to Cys34 in the tryptic T3 peptide of human serum albumin (HSA) (21ALVLIAFAQYLQQC34PFEDHVK41). In order to detect these peptide modifications without targeting specific masses, the pipeline interrogates MS2 ions that are signatures of the T3 peptide. The pipeline had been pilot-tested with archived plasma from healthy human subjects, and several of the 43 Cys34 adducts were highly associated with the smoking status. In the current investigation, we adapted the pipeline to include modifications to the ε-amino group of Lys525─a major glycation site in HSA─and thereby extend the coverage to products of Schiff bases that cannot be produced at Cys34. Because trypsin is generally unable to digest proteins at modified lysines, our pipeline detects miscleaved tryptic peptides with the sequence 525KQTALVELVK534. Adducts of both Lys525 and Cys34 are measured in a single nLC-HR-MS/MS run by increasing the mass range of precursor ions in MS1 scans and including both triply and doubly charged precursor ions for collision-induced dissociation fragmentation. For proof of principle, we applied the Cys34/Lys525 pipeline to archived plasma specimens from a subset of the same volunteer subjects used in the original investigation. Twelve modified Lys525 peptides were detected, including products of glycation (fructosyl-lysine plus advanced-glycated-end products), acetylation, and elimination of ammonia and water. Surprisingly, the carbamylated and glycated adducts were present at significantly lower levels in smoking subjects. By including a larger class of in vivo nucleophilic substitution reactions, the Cys34/Lys525 adductomics pipeline expands exposomic investigations of unknown human exposure to reactive electrophiles derived from both exogenous and endogenous sources.
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Affiliation(s)
- Hasmik Grigoryan
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, California 94720, United States
| | - Partow Imani
- Division of Biostatistics, School of Public Health, University of California, Berkeley, California 94720, United States
| | - Sandrine Dudoit
- Division of Biostatistics, School of Public Health, University of California, Berkeley, California 94720, United States.,Department of Statistics, University of California, Berkeley, California 94720, United States
| | - Stephen M Rappaport
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, California 94720, United States
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17
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Povaliaeva A, Bogdanov V, Pigarova E, Zhukov A, Dzeranova L, Belaya Z, Rozhinskaya L, Mel’nichenko G, Mokrysheva N. Assessment of Vitamin D Metabolism in Patients with Cushing's Disease in Response to 150,000 IU Cholecalciferol Treatment. Nutrients 2021; 13:nu13124329. [PMID: 34959880 PMCID: PMC8704048 DOI: 10.3390/nu13124329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/26/2021] [Accepted: 11/27/2021] [Indexed: 12/12/2022] Open
Abstract
In this study we aimed to assess vitamin D metabolism in patients with Cushing’s disease (CD) compared to healthy individuals in the setting of bolus cholecalciferol treatment. The study group included 30 adults with active CD and the control group included 30 apparently healthy adults with similar age, sex and BMI. All participants received a single dose (150,000 IU) of cholecalciferol aqueous solution orally. Laboratory assessments including serum vitamin D metabolites (25(OH)D3, 25(OH)D2, 1,25(OH)2D3, 3-epi-25(OH)D3 and 24,25(OH)2D3), free 25(OH)D, vitamin D-binding protein (DBP) and parathyroid hormone (PTH) as well as serum and urine biochemical parameters were performed before the intake and on Days 1, 3 and 7 after the administration. All data were analyzed with non-parametric statistics. Patients with CD had similar to healthy controls 25(OH)D3 levels (p > 0.05) and higher 25(OH)D3/24,25(OH)2D3 ratios (p < 0.05) throughout the study. They also had lower baseline free 25(OH)D levels (p < 0.05) despite similar DBP levels (p > 0.05) and lower albumin levels (p < 0.05); 24-h urinary free cortisol showed significant correlation with baseline 25(OH)D3/24,25(OH)2D3 ratio (r = 0.36, p < 0.05). The increase in 25(OH)D3 after cholecalciferol intake was similar in obese and non-obese states and lacked correlation with BMI (p > 0.05) among patients with CD, as opposed to the control group. Overall, patients with CD have a consistently higher 25(OH)D3/24,25(OH)2D3 ratio, which is indicative of a decrease in 24-hydroxylase activity. This altered activity of the principal vitamin D catabolism might influence the effectiveness of cholecalciferol treatment. The observed difference in baseline free 25(OH)D levels is not entirely clear and requires further study.
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18
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Wiglusz K, Żurawska-Płaksej E, Rorbach-Dolata A, Piwowar A. How Does Glycation Affect Binding Parameters of the Albumin-Gliclazide System in the Presence of Drugs Commonly Used in Diabetes? In Vitro Spectroscopic Study. Molecules 2021; 26:molecules26133869. [PMID: 34202801 PMCID: PMC8270297 DOI: 10.3390/molecules26133869] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 11/16/2022] Open
Abstract
In this research, the selected drugs commonly used in diabetes and its comorbidities (gliclazide, cilazapril, atorvastatin, and acetylsalicylic acid) were studied for their interactions with bovine serum albumin-native and glycated. Two different spectroscopic methods, fluorescence quenching and circular dichroism, were utilized to elucidate the binding interactions of the investigational drugs. The glycation process was induced in BSA by glucose and was confirmed by the presence of advanced glycosylation end products (AGEs). The interaction between albumin and gliclazide, with the presence of another drug, was confirmed by calculation of association constants (0.11-1.07 × 104 M-1). The nature of changes in the secondary structure of a protein depends on the drug used and the degree of glycation. Therefore, these interactions may have an influence on pharmacokinetic parameters.
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Affiliation(s)
- Katarzyna Wiglusz
- Department of Analytical Chemistry, Wroclaw Medical University, Borowska 211, PL-50556 Wrocław, Poland;
| | - Ewa Żurawska-Płaksej
- Department of Toxicology, Wroclaw Medical University, Borowska 211, PL-50556 Wrocław, Poland; (A.R.-D.); (A.P.)
- Department of Pharmaceutical Biochemistry, Wroclaw Medical University, Borowska 211, PL-50556 Wrocław, Poland
- Correspondence: ; Tel.: +48-71-784-0453
| | - Anna Rorbach-Dolata
- Department of Toxicology, Wroclaw Medical University, Borowska 211, PL-50556 Wrocław, Poland; (A.R.-D.); (A.P.)
| | - Agnieszka Piwowar
- Department of Toxicology, Wroclaw Medical University, Borowska 211, PL-50556 Wrocław, Poland; (A.R.-D.); (A.P.)
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19
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Evaluation of Vitamin D Metabolism in Patients with Type 1 Diabetes Mellitus in the Setting of Cholecalciferol Treatment. Nutrients 2020; 12:nu12123873. [PMID: 33352890 PMCID: PMC7767242 DOI: 10.3390/nu12123873] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/11/2020] [Accepted: 12/14/2020] [Indexed: 11/16/2022] Open
Abstract
In this prospective controlled study, we examined 25 adults with adequately controlled (HbA1c level < 8.0%) type 1 diabetes mellitus (T1DM) and 49 conditionally healthy adults, intending to reveal the diversity of vitamin D metabolism in the setting of cholecalciferol intake at a therapeutic dose. All patients received a single dose (150,000 IU) of cholecalciferol aqueous solution orally. Laboratory assessments including serum vitamin D metabolites (25(OH)D3, 25(OH)D2, 1,25(OH)2D3, 3-epi-25(OH)D3 and 24,25(OH)2D3), free 25(OH)D, vitamin D-binding protein (DBP) and parathyroid hormone (PTH) as well as serum and urine biochemical parameters were performed before the intake and on Days 1, 3 and 7 after the administration. The studied groups had no significant differences in baseline parameters except that the patients with diabetes showed higher baseline levels of free 25(OH)D (p < 0.05). They also lacked a correlation between the measured and calculated free 25(OH)D in contrast to the patients from the control group (r = 0.41, p > 0.05 vs. r = 0.88, p < 0.05), possibly due to the glycosylation of binding proteins, which affects the affinity constant for 25(OH)D. The elevation of vitamin D levels after the administration of cholecalciferol was comparable in both groups, with slightly higher 25(OH)D3 levels observed in the diabetes group throughout the study since Day 1 (p < 0.05). Overall, our data indicate that in patients with adequately controlled T1DM 25(OH)D3 levels and the therapeutic response to cholecalciferol is similar to that in healthy individuals.
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20
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Yousefpour P, Varanko A, Subrahmanyan R, Chilkoti A. Recombinant Fusion of Glucagon‐Like Peptide‐1 and an Albumin Binding Domain Provides Glycemic Control for a Week in Diabetic Mice. ADVANCED THERAPEUTICS 2020. [DOI: 10.1002/adtp.202000073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Parisa Yousefpour
- Department of Biomedical Engineering Duke University Durham NC 27708 USA
| | - Anastasia Varanko
- Department of Biomedical Engineering Duke University Durham NC 27708 USA
| | | | - Ashutosh Chilkoti
- Department of Biomedical Engineering Duke University Durham NC 27708 USA
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21
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Leboffe L, di Masi A, Polticelli F, Trezza V, Ascenzi P. Structural Basis of Drug Recognition by Human Serum Albumin. Curr Med Chem 2020; 27:4907-4931. [DOI: 10.2174/0929867326666190320105316] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 02/12/2019] [Accepted: 03/06/2019] [Indexed: 12/18/2022]
Abstract
Background:
Human serum albumin (HSA), the most abundant protein in plasma,
is a monomeric multi-domain macromolecule with at least nine binding sites for endogenous
and exogenous ligands. HSA displays an extraordinary ligand binding capacity as a depot and
carrier for many compounds including most acidic drugs. Consequently, HSA has the potential
to influence the pharmacokinetics and pharmacodynamics of drugs.
Objective:
In this review, the structural determinants of drug binding to the multiple sites of
HSA are analyzed and discussed in detail. Moreover, insight into the allosteric and competitive
mechanisms underpinning drug recognition, delivery, and efficacy are analyzed and discussed.
Conclusion:
As several factors can modulate drug binding to HSA (e.g., concurrent administration
of drugs competing for the same binding site, ligand binding to allosteric-coupled
clefts, genetic inherited diseases, and post-translational modifications), ligand binding to HSA
is relevant not only under physiological conditions, but also in the pharmacological therapy
management.
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Affiliation(s)
- Loris Leboffe
- Department of Sciences, University Roma Tre, Viale Guglielmo Marconi 446, I-00146 Roma, Italy
| | - Alessandra di Masi
- Department of Sciences, University Roma Tre, Viale Guglielmo Marconi 446, I-00146 Roma, Italy
| | - Fabio Polticelli
- Department of Sciences, University Roma Tre, Viale Guglielmo Marconi 446, I-00146 Roma, Italy
| | - Viviana Trezza
- Department of Sciences, University Roma Tre, Viale Guglielmo Marconi 446, I-00146 Roma, Italy
| | - Paolo Ascenzi
- Interdepartmental Laboratory for Electron Microscopy, Roma Tre University, Via della Vasca Navale 79, I- 00146 Roma, Italy
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22
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Delveaux J, Turpin C, Veeren B, Diotel N, Bravo SB, Begue F, Álvarez E, Meilhac O, Bourdon E, Rondeau P. Antirhea borbonica Aqueous Extract Protects Albumin and Erythrocytes from Glycoxidative Damages. Antioxidants (Basel) 2020; 9:antiox9050415. [PMID: 32408712 PMCID: PMC7278591 DOI: 10.3390/antiox9050415] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/08/2020] [Accepted: 05/09/2020] [Indexed: 12/11/2022] Open
Abstract
Diabetes constitutes a major health problem associated with severe complications. In hyperglycemic conditions, chronically increased oxidation and glycation of circulating components lead to advanced glycation end-products (AGEs) formation, a key contributor in diabetes complication progression. In line with literature documenting the beneficial properties of herbal teas, this study evaluates the antioxidant/glycant properties of Antirhea borbonica (Ab). Ab aqueous extract effects were tested on human albumin or erythrocytes submitted to methyl glyoxal-mediated glycoxidative damages. By using mass spectrometry, Ab aqueous extracts revealed to be rich in polyphenols. All tested biomarkers of oxidation and glycation, such as AGE, ketoamine, oxidized thiol groups, were decreased in albumin when glycated in the presence of Ab aqueous extract. Ab extract preserve erythrocyte from methylglyoxal (MGO)-induced damages in terms of restored membrane deformability, reduced oxidative stress and eryptosis phenomenon. Antioxidant capacities of Ab extract on erythrocytes were retrieved in vivo in zebrafish previously infused with MGO. These results bring new evidences on the deleterious impacts of glycation on albumin and erythrocyte in diabetes. Furthermore, it reveals antioxidant and antiglycant properties of Ab that could be used for the dietary modulation of oxidative stress and glycation in hyperglycemic situations.
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Affiliation(s)
- Jade Delveaux
- Université de La Réunion, INSERM, UMR 1188 Diabète athérothombose Thérapies Réunion Océan Indien (DéTROI), 97400 Saint-Denis de La Réunion, France; (J.D.); (C.T.); (B.V.); (N.D.); (F.B.); (O.M.)
| | - Chloé Turpin
- Université de La Réunion, INSERM, UMR 1188 Diabète athérothombose Thérapies Réunion Océan Indien (DéTROI), 97400 Saint-Denis de La Réunion, France; (J.D.); (C.T.); (B.V.); (N.D.); (F.B.); (O.M.)
| | - Bryan Veeren
- Université de La Réunion, INSERM, UMR 1188 Diabète athérothombose Thérapies Réunion Océan Indien (DéTROI), 97400 Saint-Denis de La Réunion, France; (J.D.); (C.T.); (B.V.); (N.D.); (F.B.); (O.M.)
| | - Nicolas Diotel
- Université de La Réunion, INSERM, UMR 1188 Diabète athérothombose Thérapies Réunion Océan Indien (DéTROI), 97400 Saint-Denis de La Réunion, France; (J.D.); (C.T.); (B.V.); (N.D.); (F.B.); (O.M.)
| | - Susana B. Bravo
- Proteomic Unit and Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Complexo Hospitalario Universitario de Santiago de Compostela (CHUS), SERGAS, 15706 Santiago de Compostela, Spain; (S.B.B.); (E.Á.)
| | - Floran Begue
- Université de La Réunion, INSERM, UMR 1188 Diabète athérothombose Thérapies Réunion Océan Indien (DéTROI), 97400 Saint-Denis de La Réunion, France; (J.D.); (C.T.); (B.V.); (N.D.); (F.B.); (O.M.)
| | - Ezequiel Álvarez
- Proteomic Unit and Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Complexo Hospitalario Universitario de Santiago de Compostela (CHUS), SERGAS, 15706 Santiago de Compostela, Spain; (S.B.B.); (E.Á.)
- CIBERCV, 28029 Madrid, Spain
| | - Olivier Meilhac
- Université de La Réunion, INSERM, UMR 1188 Diabète athérothombose Thérapies Réunion Océan Indien (DéTROI), 97400 Saint-Denis de La Réunion, France; (J.D.); (C.T.); (B.V.); (N.D.); (F.B.); (O.M.)
- Centre hospitalier universitaire de La Réunion, 97400 Saint Denis, France
| | - Emmanuel Bourdon
- Université de La Réunion, INSERM, UMR 1188 Diabète athérothombose Thérapies Réunion Océan Indien (DéTROI), 97400 Saint-Denis de La Réunion, France; (J.D.); (C.T.); (B.V.); (N.D.); (F.B.); (O.M.)
- Correspondence: (E.B.); (P.R.); Tel.: +262(0)-2-62-93-88-43 (P.R.); Fax: +262(0)-2-62-93-88-01 (P.R.)
| | - Philippe Rondeau
- Université de La Réunion, INSERM, UMR 1188 Diabète athérothombose Thérapies Réunion Océan Indien (DéTROI), 97400 Saint-Denis de La Réunion, France; (J.D.); (C.T.); (B.V.); (N.D.); (F.B.); (O.M.)
- Correspondence: (E.B.); (P.R.); Tel.: +262(0)-2-62-93-88-43 (P.R.); Fax: +262(0)-2-62-93-88-01 (P.R.)
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Sambol M, Ester K, Landgraf S, Mihaljević B, Cindrić M, Kralj M, Basarić N. Competing photochemical reactions of bis-naphthols and their photoinduced antiproliferative activity. Photochem Photobiol Sci 2019; 18:1197-1211. [PMID: 30820496 DOI: 10.1039/c8pp00532j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The photophysical properties and photochemical reactivities of a series of bis-naphthols 4a-4e and bis-anthrols 5a and 5e were investigated by preparative irradiation in CH3OH, fluorescence spectroscopy and laser flash photolysis (LFP). Methanolysis taking place via photodehydration (bis-naphthols: ΦR = 0.04-0.05) is in competition with symmetry breaking charge separation (SB-CS). The SB-CS gave rise to radical ions that were detected for 4a and 4e by LFP. Photodehydration gave quinone methides (QMs) that were also detected by LFP (λmax = 350 nm, τ ≈ 1-2 ms). In the aqueous solvent, excited state proton transfer (ESPT) competes with the abovementioned processes, giving rise to naphtholates, but the process is inefficient and can only be observed in the buffered aqueous solution at pH > 7. Since the dehydration of bis-naphthols delivers QMs, their potential antiproliferative activity was investigated by an MTT test on three human cancer cell lines (NCI-H1299, lung carcinoma; MCF-7, breast adenocarcinoma; and SUM159, pleomorphic breast carcinoma). Cells were treated with 4 or 5 with or without irradiation (350 nm). An enhancement of the activity (up to 10-fold) was observed upon irradiation, which may be associated with QM formation. However, these QMs do not cross-link DNA. The activity is most likely associated with the alkylation of proteins present in the cell cytoplasm, as evidenced by photoinduced alkylation of bovine and human serum albumins by 4a.
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Affiliation(s)
- Matija Sambol
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, 10 000 Zagreb, Croatia.
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