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Manning MC, Holcomb RE, Payne RW, Stillahn JM, Connolly BD, Katayama DS, Liu H, Matsuura JE, Murphy BM, Henry CS, Crommelin DJA. Stability of Protein Pharmaceuticals: Recent Advances. Pharm Res 2024:10.1007/s11095-024-03726-x. [PMID: 38937372 DOI: 10.1007/s11095-024-03726-x] [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: 03/25/2024] [Accepted: 06/03/2024] [Indexed: 06/29/2024]
Abstract
There have been significant advances in the formulation and stabilization of proteins in the liquid state over the past years since our previous review. Our mechanistic understanding of protein-excipient interactions has increased, allowing one to develop formulations in a more rational fashion. The field has moved towards more complex and challenging formulations, such as high concentration formulations to allow for subcutaneous administration and co-formulation. While much of the published work has focused on mAbs, the principles appear to apply to any therapeutic protein, although mAbs clearly have some distinctive features. In this review, we first discuss chemical degradation reactions. This is followed by a section on physical instability issues. Then, more specific topics are addressed: instability induced by interactions with interfaces, predictive methods for physical stability and interplay between chemical and physical instability. The final parts are devoted to discussions how all the above impacts (co-)formulation strategies, in particular for high protein concentration solutions.'
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Affiliation(s)
- Mark Cornell Manning
- Legacy BioDesign LLC, Johnstown, CO, USA.
- Department of Chemistry, Colorado State University, Fort Collins, CO, USA.
| | - Ryan E Holcomb
- Legacy BioDesign LLC, Johnstown, CO, USA
- Department of Chemistry, Colorado State University, Fort Collins, CO, USA
| | - Robert W Payne
- Legacy BioDesign LLC, Johnstown, CO, USA
- Department of Chemistry, Colorado State University, Fort Collins, CO, USA
| | - Joshua M Stillahn
- Legacy BioDesign LLC, Johnstown, CO, USA
- Department of Chemistry, Colorado State University, Fort Collins, CO, USA
| | | | | | | | | | | | - Charles S Henry
- Department of Chemistry, Colorado State University, Fort Collins, CO, USA
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2
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Samadian H, Merzel RL, Dyson JM, Chen J, Frey C, Jones A, Vartanian M, Ward BB, Banaszak Holl MM. Anti-tumor Effect of Folate-Binding Protein: In Vitro and In Vivo Studies. Mol Pharm 2022; 19:843-852. [PMID: 35133169 DOI: 10.1021/acs.molpharmaceut.1c00794] [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: 02/05/2023]
Abstract
Folate receptor (FR) overexpression in a wide range of solid tumors provides an opportunity to develop novel, targeted cancer therapeutics. In this study, we investigated whether prebinding the chemotherapeutic methotrexate (MTX) to folate-binding protein (FBP), the soluble form of FR, would enable the protein to serve as a targeted therapeutic vector, enhancing uptake into tumor cells and improving therapeutic efficacy. In an in vivo study, using an FR-overexpressing KB xenograft model in SCID mice, modest improvement in inhibiting tumor growth was observed for the MTX/FBP mixtures as compared to saline control and free MTX. Surprisingly, FBP alone inhibited tumor growth compared to saline control, free MTX, and FBP/MTX. In order to better understand this effect, we investigated the cytotoxicity of micromolar concentrations of FBP in vitro using the KB, HeLa, and A549 cancer cell lines. Our results revealed concentration-dependent apoptosis (24 h; 10-50 μM) in all three cell lines accompanied by a time- and concentration-dependent reduction (6, 12, and 24 h; 10-50 μM) in metabolic activity and compromised cell plasma membrane integrity. This study demonstrates an apoptosis pathway for cytotoxicity of FBP, an endogenous serum protein, in cancer cell lines with widely varying levels of FR expression. Furthermore, in vivo tumor growth suppression for xenograft KB tumors in SCID mice was observed. These studies suggest novel strategies for the elimination of cancer cells employing endogenous, serum transport proteins.
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Affiliation(s)
- Hajar Samadian
- Department of Chemical and Biological Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Rachel L Merzel
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Jennifer M Dyson
- Faculty of Engineering, Monash University, Clayton, Victoria 3800, Australia.,Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia.,Cancer Program, Monash Biomedicine Discovery Institute, Clayton, Victoria 3800, Australia
| | - Junjie Chen
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Carolina Frey
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Alexis Jones
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Mark Vartanian
- Oral and Maxillofacial Surgery/Hospital Dentistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Brent B Ward
- Oral and Maxillofacial Surgery/Hospital Dentistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Mark M Banaszak Holl
- Department of Chemical and Biological Engineering, Monash University, Clayton, Victoria 3800, Australia
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3
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Mylkie K, Nowak P, Rybczynski P, Ziegler-Borowska M. Polymer-Coated Magnetite Nanoparticles for Protein Immobilization. MATERIALS (BASEL, SWITZERLAND) 2021; 14:E248. [PMID: 33419055 PMCID: PMC7825442 DOI: 10.3390/ma14020248] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/26/2020] [Accepted: 12/28/2020] [Indexed: 11/20/2022]
Abstract
Since their discovery, magnetic nanoparticles (MNPs) have become materials with great potential, especially considering the applications of biomedical sciences. A series of works on the preparation, characterization, and application of MNPs has shown that the biological activity of such materials depends on their size, shape, core, and shell nature. Some of the most commonly used MNPs are those based on a magnetite core. On the other hand, synthetic biopolymers are used as a protective surface coating for these nanoparticles. This review describes the advances in the field of polymer-coated MNPs for protein immobilization over the past decade. General methods of MNP preparation and protein immobilization are presented. The most extensive section of this article discusses the latest work on the use of polymer-coated MNPs for the physical and chemical immobilization of three types of proteins: enzymes, antibodies, and serum proteins. Where possible, the effectiveness of the immobilization and the activity and use of the immobilized protein are reported. Finally, the information available in the peer-reviewed literature and the application perspectives for the MNP-immobilized protein systems are summarized as well.
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Affiliation(s)
| | | | | | - Marta Ziegler-Borowska
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland; (K.M.); (P.N.); (P.R.)
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Testing for Ketoprofen Binding to HSA Coated Magnetic Nanoparticles under Normal Conditions and after Oxidative Stress. Molecules 2020; 25:molecules25081945. [PMID: 32331398 PMCID: PMC7221658 DOI: 10.3390/molecules25081945] [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: 04/02/2020] [Revised: 04/18/2020] [Accepted: 04/21/2020] [Indexed: 11/29/2022] Open
Abstract
Binding and transport of ligands is one of the most important functions of human blood serum proteins. Human serum albumin is found in plasma at the highest concentration. Because of this, it is important to study protein–drug interactions for this albumin. Since there is no single model describing this interaction, it is necessary to measure it for each active substance. Drug binding should also be studied in conditions that simulate pathological conditions of the body, i.e., after oxidative stress. Due to this, it is expected that the methods for testing these interactions need to be easy and fast. In this study, albumin immobilized on magnetic nanoparticles was successfully applied in the study of protein–drug binding. Ketoprofen was selected as a model drug and interactions were tested under normal conditions and artificially induced oxidative stress. The quality of obtained results for immobilized protein was confirmed with those for free albumin and literature data. It was shown that the type of magnetic core coverage does not affect the quality of the obtained results. In summary, a new, fast, effective, and universal method for testing protein–drug interactions was proposed, which can be performed in most laboratories.
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Rey EG, Finkelstein JL, Erickson D. Fluorescence lateral flow competitive protein binding assay for the assessment of serum folate concentrations. PLoS One 2019; 14:e0217403. [PMID: 31166978 PMCID: PMC6550397 DOI: 10.1371/journal.pone.0217403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 05/11/2019] [Indexed: 01/21/2023] Open
Abstract
Folate is a micronutrient required for the production of new cells, making it a key factor in early fetal development and ensuring normal growth and maintenance of health. The increase in consumption of folate due to increased periconceptional supplementation and fortification of grains in many countries has led to a decrease in occurrence of folate deficiency and a class of birth defects called neural tube defects. However, an opportunity remains to further improve folate status of populations in areas with limited access to fortified foods and supplementation. Screening of women of reproductive age and other vulnerable populations for folate status would increase our understanding of the magnitude of the burden of folate deficiency and inform monitoring of public health programs. Current gold standard methods for folate assessment are time-intensive and require cold chain, sophisticated laboratory infrastructure, and highly-trained personnel. Our lateral flow assay is low-cost, easy to use, and allows a user to assess folate insufficiency at the point of care in less than 40 minutes. We evaluated the sensitivity and specificity of our assay in 24 human serum samples, including 8 samples with folate concentrations less than 10.0 nmol/L and 14 samples less than 13.4 nmol/L using the Immulite 2000 commercial assay as a reference standard. The sensitivity and specificity were found to be 93% (95% CI: 54.7-100.0) and 91% (95% CI: 80.0-100.0), respectively, when using our test to determine folate insufficiency based on a cutoff of 13.4 nmol/L. Our point-of-care diagnostic test for folate concentrations could inform screening and public health programs in at-risk populations.
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Affiliation(s)
- Elizabeth G. Rey
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York, United States of America
| | - Julia L. Finkelstein
- Division of Nutritional Sciences, Cornell University, Ithaca, New York, United States of America
| | - David Erickson
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York, United States of America
- Division of Nutritional Sciences, Cornell University, Ithaca, New York, United States of America
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Merzel R, Orr BG, Banaszak Holl MM. Distributions: The Importance of the Chemist's Molecular View for Biological Materials. Biomacromolecules 2018; 19:1469-1484. [PMID: 29663809 PMCID: PMC5954352 DOI: 10.1021/acs.biomac.8b00375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 04/15/2018] [Indexed: 12/29/2022]
Abstract
Characterization of materials with biological applications and assessment of physiological effects of therapeutic interventions are critical for translating research to the clinic and preventing adverse reactions. Analytical techniques typically used to characterize targeted nanomaterials and tissues rely on bulk measurement. Therefore, the resulting data represent an average structure of the sample, masking stochastic (randomly generated) distributions that are commonly present. In this Perspective, we examine almost 20 years of work our group has done in different fields to characterize and control distributions. We discuss the analytical techniques and statistical methods we use and illustrate how we leverage them in tandem with other bulk techniques. We also discuss the challenges and time investment associated with taking such a detailed view of distributions as well as the risks of not fully appreciating the extent of heterogeneity present in many systems. Through three case studies showcasing our research on conjugated polymers for drug delivery, collagen in bone, and endogenous protein nanoparticles, we discuss how identification and characterization of distributions, i.e., a molecular view of the system, was critical for understanding the observed biological effects. In all three cases, data would have been misinterpreted and insights missed if we had only relied upon spatially averaged data. Finally, we discuss how new techniques are starting to bridge the gap between bulk and molecular level analysis, bringing more opportunity and capacity to the research community to address the challenges of distributions and their roles in biology, chemistry, and the translation of science and engineering to societal challenges.
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Affiliation(s)
- Rachel
L. Merzel
- Department
of Chemistry and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Bradford G. Orr
- Department
of Chemistry and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, United States
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7
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Merzel RL, Frey C, Chen J, Garn R, van Dongen M, Dougherty CA, Kandaluru AK, Low PS, Marsh ENG, Banaszak Holl MM. Conjugation Dependent Interaction of Folic Acid with Folate Binding Protein. Bioconjug Chem 2017; 28:2350-2360. [PMID: 28731321 DOI: 10.1021/acs.bioconjchem.7b00373] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Serum proteins play a critical role in the transport, uptake, and efficacy of targeted drug therapies, and here we investigate the interactions between folic acid-polymer conjugates and serum folate binding protein (FBP), the soluble form of the cellular membrane-bound folate receptor. We demonstrate that both choice of polymer and method of ligand conjugation affect the interactions between folic acid-polymer conjugates and serum FBP, resulting in changes in the folic acid-induced protein aggregation process. We have previously demonstrated that individual FBP molecules self-aggregate into nanoparticles at physiological concentrations. When poly(amidoamine) dendrimer-folic acid conjugates bound to FBP, the distribution of nanoparticles was preserved. However, the dendritic conjugates produced larger nanoparticles than those formed in the presence of physiologically normal human levels of folic acid, and the conjugation method affected particle size distribution. In contrast, poly(ethylene glycol)-folic acid conjugates demonstrated substantially reduced binding to FBP, did not cause folic acid-induced aggregation, and fully disrupted FBP self-aggregation. On the basis of these results, we discuss the potential implications for biodistribution, trafficking, and therapeutic efficacy of targeted nanoscale therapeutics, especially considering the widespread clinical use of poly(ethylene glycol) conjugates. We highlight the importance of considering specific serum protein interactions in the rational design of similar nanocarrier systems. Our results suggest that prebinding therapeutic nanocarriers to serum FBP may allow folate-specific metabolic pathways to be exploited for delivery while also affording benefits of utilizing an endogenous protein as a vector.
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Affiliation(s)
| | | | | | | | | | | | - Ananda Kumar Kandaluru
- Department of Chemistry, Purdue University , West Lafayette, Indiana 47907, United States
| | - Philip S Low
- Department of Chemistry, Purdue University , West Lafayette, Indiana 47907, United States
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Merzel RL, Boutom SM, Chen J, Frey C, Shedden K, Marsh ENG, Banaszak Holl MM. Folate binding protein: therapeutic natural nanotechnology for folic acid, methotrexate, and leucovorin. NANOSCALE 2017; 9:2603-2615. [PMID: 28155935 DOI: 10.1039/c6nr09060e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Blood serum proteins play a critical role in the transport, biodistribution, and efficacy of systemically-delivered therapeutics. Here, we have investigated the concentration- and ligand-dependent aggregation of folate binding protein (FBP), focusing in particular on folic acid, an important vitamin and targeting agent; methotrexate, an antifolate drug used to treat cancer and rheumatoid arthritis; and leucovorin which is used to decrease methotrexate toxicity. We employed atomic force microscopy to characterize, on a particle-by-particle basis, the volumes of the FBP nanoparticles that form upon ligand binding. We measured the distribution of FBP nanoparticle volumes as a function of ligand concentration over physiologically- and therapeutically-relevant ranges. At physiologically-relevant concentrations, significant differences in particle volume distributions exist that we hypothesize are consistent with different trafficking mechanisms for folic acid and methotrexate. In addition, we hypothesize leucovorin is trafficked and delivered like folic acid at therapeutically-relevant concentrations. We propose that changes in dosing procedures could improve the delivery and therapeutic index for methotrexate and other folic acid-targeted drug conjugates and imaging agents. Specifically, we suggest pre-binding the drugs to FBP may provide a better formulation for drug delivery of methotrexate for both cancer and rheumatoid arthritis. This would be analogous to pre-binding paclitaxel to albumin, which is already used in the clinic.
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Affiliation(s)
- Rachel L Merzel
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA.
| | - Sarah M Boutom
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA.
| | - Junjie Chen
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA.
| | - Carolina Frey
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA.
| | - Kerby Shedden
- Department of Statistics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - E Neil G Marsh
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA. and Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Mark M Banaszak Holl
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA. and Department of Biomedical Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA and Program in Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA
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9
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Ki MR, Nguyen TKM, Kim SH, Kwon I, Pack SP. Chimeric protein of internally duplicated α-type carbonic anhydrase from Dunaliella species for improved expression and CO 2 sequestration. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.05.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Minton AP. Recent applications of light scattering measurement in the biological and biopharmaceutical sciences. Anal Biochem 2016; 501:4-22. [PMID: 26896682 PMCID: PMC5804501 DOI: 10.1016/j.ab.2016.02.007] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 02/04/2016] [Accepted: 02/05/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Allen P Minton
- Laboratory of Biochemistry and Genetics, National Institutes of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, 20892, USA.
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11
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Chen J, van Dongen MA, Merzel RL, Dougherty CA, Orr BG, Kanduluru AK, Low PS, Marsh ENG, Banaszak Holl MM. Substrate-Triggered Exosite Binding: Synergistic Dendrimer/Folic Acid Action for Achieving Specific, Tight-Binding to Folate Binding Protein. Biomacromolecules 2016; 17:922-7. [PMID: 26815158 DOI: 10.1021/acs.biomac.5b01586] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Polymer-ligand conjugates are designed to bind proteins for applications as drugs, imaging agents, and transport scaffolds. In this work, we demonstrate a folic acid (FA)-triggered exosite binding of a generation five poly(amidoamine) (G5 PAMAM) dendrimer scaffold to bovine folate binding protein (bFBP). The protein exosite is a secondary binding site on the protein surface, separate from the FA binding pocket, to which the dendrimer binds. Exosite binding is required to achieve the greatly enhanced binding constants and protein structural change observed in this study. The G5Ac-COG-FA1.0 conjugate bound tightly to bFBP, was not displaced by a 28-fold excess of FA, and quenched roughly 80% of the initial fluorescence. Two-step binding kinetics were measured using the intrinsic fluorescence of the FBP tryptophan residues to give a KD in the low nanomolar range for formation of the initial G5Ac-COG-FA1.0/FBP* complex, and a slow conversion to the tight complex formed between the dendrimer and the FBP exosite. The extent of quenching was sensitive to the choice of FA-dendrimer linker chemistry. Direct amide conjugation of FA to G5-PAMAM resulted in roughly 50% fluorescence quenching of the FBP. The G5Ac-COG-FA, which has a longer linker containing a 1,2,3-triazole ring, exhibited an ∼80% fluorescence quenching. The binding of the G5Ac-COG-FA1.0 conjugate was compared to poly(ethylene glycol) (PEG) conjugates of FA (PEGn-FA). PEG2k-FA had a binding strength similar to that of FA, whereas other PEG conjugates with higher molecular weight showed weaker binding. However, no PEG conjugates gave an increased degree of total fluorescence quenching.
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Affiliation(s)
| | | | | | | | | | - Ananda Kumar Kanduluru
- Department of Chemistry and Center for Drug Discovery, Purdue University , West Lafayette, Indiana 47907, United States
| | - Philip S Low
- Department of Chemistry and Center for Drug Discovery, Purdue University , West Lafayette, Indiana 47907, United States
| | - E Neil G Marsh
- Department of Biological Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Mark M Banaszak Holl
- Macromolecular Science and Engineering, University of Michigan , Ann Arbor, Michigan 48109, United States
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Holm J, Bruun SW, Hansen SI. The complex interplay between ligand binding and conformational structure of the folate binding protein (folate receptor): Biological perspectives. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2015; 1854:1249-59. [PMID: 26116148 DOI: 10.1016/j.bbapap.2015.06.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 06/05/2015] [Accepted: 06/23/2015] [Indexed: 11/27/2022]
Abstract
This review analyzes how interplay between folate binding and changes in folate binding protein (FBP) conformation/self-association affects the biological function of FBP. Concentration-dependent, reversible self-association of hydrophobic apo-FBP at pI=7.4 is associated with decreased affinity for folate, probably due to shielding of binding sites between interacting hydrophobic patches. Titration with folate removes apo-monomers, favoring dissociation of self-associated apo-FBP into apo-monomers. Folate anchors to FBP through a network of hydrogen bonds and hydrophobic interactions, and the binding induces a conformational change with formation of hydrophilic and stable holo-FBP. Holo-FBP exhibits a ligand-mediated concentration-dependent self-association into multimers of great thermal and chemical stability due to strong intermolecular forces. Both ligand and FBP are thus protected against biological/physicochemical decomposition. In biological fluids with low FBP concentrations, e.g., saliva, semen and plasma, hydrophobic apo-monomers and hydrophilic holo-monomers associate into stable asymmetrical complexes with aberrant binding kinetics unless detergents, e.g., cholesterol or phospholipids are present.
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Affiliation(s)
- Jan Holm
- Department of Clinical Biochemistry, Nordsjællands Hospital - Hillerød, University Hospital Copenhagen, Dyrehavevej 29, DK-3400 Hillerød, Denmark.
| | - Susanne W Bruun
- Faculty of Science, Department of Food Science, Spectroscopy and Chemometrics, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg, Denmark
| | - Steen I Hansen
- Department of Clinical Biochemistry, Nordsjællands Hospital - Hillerød, University Hospital Copenhagen, Dyrehavevej 29, DK-3400 Hillerød, Denmark.
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13
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Merzel RL, Chen JJ, Marsh ENG, Holl MMB. Folate binding protein—Outlook for drug delivery applications. CHINESE CHEM LETT 2015. [DOI: 10.1016/j.cclet.2014.12.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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