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Stanciu MC, Nichifor M, Teacă CA. Bile Acid Sequestrants Based on Natural and Synthetic Gels. Gels 2023; 9:500. [PMID: 37367171 DOI: 10.3390/gels9060500] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/16/2023] [Accepted: 06/16/2023] [Indexed: 06/28/2023] Open
Abstract
Bile acid sequestrants (BASs) are non-systemic therapeutic agents used for the management of hypercholesterolemia. They are generally safe and not associated with serious systemic adverse effects. Usually, BASs are cationic polymeric gels that have the ability to bind bile salts in the small intestine and eliminate them by excretion of the non-absorbable polymer-bile salt complex. This review gives a general presentation of bile acids and the characteristics and mechanisms of action of BASs. The chemical structures and methods of synthesis are shown for commercial BASs of first- (cholestyramine, colextran, and colestipol) and second-generation (colesevelam and colestilan) and potential BASs. The latter are based on either synthetic polymers such as poly((meth)acrylates/acrylamides), poly(alkylamines), poly(allylamines) and vinyl benzyl amino polymers or biopolymers, such as cellulose, dextran, pullulan, methylan, and poly(cyclodextrins). A separate section is dedicated to molecular imprinting polymers (MIPs) because of their great selectivity and affinity for the template molecules used in the imprinting technique. Focus is given to the understanding of the relationships between the chemical structure of these cross-linked polymers and their potential to bind bile salts. The synthetic pathways used in obtaining BASs and their in vitro and in vivo hypolipidemic activities are also introduced.
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Affiliation(s)
- Magdalena-Cristina Stanciu
- Natural Polymers, Bioactive and Biocompatible Materials Department, "Petru Poni" Institute of Macromolecular Chemistry, 41A, Gr. Ghica-Voda Alley, 700487 Iasi, Romania
| | - Marieta Nichifor
- Natural Polymers, Bioactive and Biocompatible Materials Department, "Petru Poni" Institute of Macromolecular Chemistry, 41A, Gr. Ghica-Voda Alley, 700487 Iasi, Romania
| | - Carmen-Alice Teacă
- Center for Advanced Research in Bionanoconjugates and Biopolymers, "Petru Poni" Institute of Macromolecular Chemistry, 41A, Gr. Ghica-Voda Alley, 700487 Iasi, Romania
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2
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Feng Y, Li Q, Ou G, Yang M, Du L. Bile acid sequestrants: a review of mechanism and design. J Pharm Pharmacol 2021; 73:855-861. [PMID: 33885783 DOI: 10.1093/jpp/rgab002] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 04/09/2021] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Bile acid sequestrants (BAS) are used extensively in the treatment of hypercholesterolaemia. This brief review aimed to describe the design and evaluation of three types of BAS: amphiphilic copolymers, cyclodextrin/poly-cyclodextrin and molecular imprinted polymers. The mechanisms underlying the action of BAS are also discussed. KEY FINDINGS BAS could lower plasma cholesterol, improve glycemic control in patients with type 2 diabetes and regulate balance energy metabolism via receptors or receptor-independent mediated mechanisms. Different types of BAS have different levels of ability to bind to bile acids, different stability and different in-vivo activity. CONCLUSIONS A growing amount of evidence suggests that bile acids play important roles not only in lipid metabolism but also in glucose metabolism. The higher selectivity, specificity, stability and in-vivo activity of BAS show considerable potential for lipid-lowering therapy.
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Affiliation(s)
- Yumiao Feng
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, China.,Pharmaceutical College, Henan University, Kaifeng, China
| | - Qian Li
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing, China.,Department of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Ge Ou
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing, China.,Department of Pharmacy, General Hospital of PLA, Beijing, China
| | - Meiyan Yang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| | - Lina Du
- Pharmaceutical College, Henan University, Kaifeng, China.,Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing, China.,Department of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
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Heřmánková E, Žák A, Poláková L, Hobzová R, Hromádka R, Širc J. Polymeric bile acid sequestrants: Review of design, in vitro binding activities, and hypocholesterolemic effects. Eur J Med Chem 2017; 144:300-317. [PMID: 29275230 DOI: 10.1016/j.ejmech.2017.12.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 12/04/2017] [Accepted: 12/04/2017] [Indexed: 01/06/2023]
Abstract
Polymeric bile acid sequestrants (BAS) have recently attracted much attention as lipid-lowering agents. These non-absorbable materials specifically bind bile acids (BAs) in the intestine, preventing bile acid (BA) reabsorption into the blood through enterohepatic circulation. Therefore, it is important to understand the structure-property relationships between the polymer sequestrant and its ability to bind specific BAs molecules. In this review, we describe pleiotropic effects of bile acids, and we focus on BAS with various molecular architectures that result in different mechanisms of BA sequestration. Here, we present 1) amphiphilic polymers based on poly(meth)acrylates, poly(meth)acrylamides, polyalkylamines and polyallylamines containing quaternary ammonium groups, 2) cyclodextrins, and 3) BAS prepared via molecular imprinting methods. The synthetic approaches leading to individual BAS preparation, as well as results of their in vitro BA binding activities and in vivo lipid-lowering activities, are discussed.
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Affiliation(s)
- Eva Heřmánková
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky sq. 2, CZ-162 06 Prague, Czech Republic.
| | - Aleš Žák
- 4th Department of Medicine, First Faculty of Medicine, Charles University, U Nemocnice 2, CZ-128 08 Prague, Czech Republic.
| | - Lenka Poláková
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky sq. 2, CZ-162 06 Prague, Czech Republic.
| | - Radka Hobzová
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky sq. 2, CZ-162 06 Prague, Czech Republic.
| | - Róbert Hromádka
- Research and Development Center, C2P s.r.o. Chlumec nad Cidlinou, Czech Republic.
| | - Jakub Širc
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky sq. 2, CZ-162 06 Prague, Czech Republic.
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Krishnaiah YSR, Yang Y, Bykadi S, Sayeed VA, Khan MA. Comparative evaluation of in vitro efficacy of colesevelam hydrochloride tablets. Drug Dev Ind Pharm 2013; 40:1173-9. [PMID: 23805883 DOI: 10.3109/03639045.2013.809534] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
CONTEXT Colesevelam hydrochloride is used as an adjunct to diet and exercise to reduce elevated low-density lipoprotein (LDL) cholesterol in patients with primary hyperlipidemia as well as to improve glycemic control in patients with type 2 diabetes. This is likely to result in submission of abbreviated new drug applications (ANDA). OBJECTIVE This study was conducted to compare the efficacy of two tablet products of colesevelam hydrochloride based on the in vitro binding of bile acid sodium salts of glycocholic acid (GC), glycochenodeoxycholic acid (GCDA) and taurodeoxycholic acid (TDCA). METHODS Kinetic binding study was carried out with constant initial bile salt concentrations as a function of time. Equilibrium binding studies were conducted under conditions of constant incubation time and varying initial concentrations of bile acid sodium salts. The unbound concentration of bile salts was determined in the samples of these studies. Langmuir equation was utilized to calculate the binding constants k1 and k2. RESULTS The amount of the three bile salts bound to both the products reached equilibrium at 3 h. The similarity factor (f2) was 99.5 based on the binding profile of total bile salts to the test and reference colesevelam tablets as a function of time. The 90% confidence interval for the test to reference ratio of k2 values were 96.06-112.07 which is within the acceptance criteria of 80-120%. CONCLUSION It is concluded from the results that the test and reference tablets of colesevelam hydrochloride showed a similar in vitro binding profile and capacity to bile salts.
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Affiliation(s)
- Yellela S R Krishnaiah
- Division of Product Quality Research, Office of Testing and Research, Office of Pharmaceutical Sciences, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring , MD , USA and
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Polomoscanik SC, Holmes-Farley SR, Petersen JS, Sacchiero RJ, Dhal PK. Hydrophobically Modified Poly(Allylamine) Hydrogels Containing Internal Quaternary Ammonium Groups as Cholesterol Lowering Agents: Synthesis, Characterization, and Biological Studies. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2012. [DOI: 10.1080/10601325.2012.728460] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Dhal PK, Gianolio DA, Miller RJ. (Bio)polymeric Hydrogels as Therapeutic Agents. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2011. [DOI: 10.1080/10601325.2011.620418] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Hanus M, Zhorov E. Bile acid salt binding with colesevelam HCl is not affected by suspension in common beverages. J Pharm Sci 2007; 95:2751-9. [PMID: 16937334 DOI: 10.1002/jps.20734] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
It has been previously reported that anions in common beverages may bind to bile acid sequestrants (BAS), reducing their capacity for binding bile acid salts. This study examined the ability of the novel BAS colesevelam hydrochloride (HCl), in vitro, to bind bile acid sodium salts following suspension in common beverages. Equilibrium binding was evaluated under conditions of constant time and varying concentrations of bile acid salts in simulated intestinal fluid (SIF). A stock solution of sodium salts of glycochenodeoxycholic acid (GCDC), taurodeoxycholic acid (TDC), and glycocholic acid (GC), was added to each prepared sample of colesevelam HCl. Bile acid salt binding was calculated by high-performance liquid chromatography (HPLC) analysis. Kinetics experiments were conducted using constant initial bile acid salt concentrations and varying binding times. The affinity, capacity, and kinetics of colesevelam HCl binding for GCDC, TDC, and GC were not significantly altered after suspension in water, carbonated water, Coca-Cola, Sprite, grape juice, orange juice, tomato juice, or Gatorade. The amount of bile acid sodium salt bound as a function of time was unchanged by pretreatment with any beverage tested. The in vitro binding characteristics of colesevelam HCl are unchanged by suspension in common beverages.
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Affiliation(s)
- Martin Hanus
- Analytical Research and Development, Genzyme Drug and Biomaterial Research and Development, Waltham, Massachussets 02451, USA
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Huval CC, Holmes‐Farley SR, Mandeville WH, Petersen JS, Sacchiero RJ, Maloney C, Dhal PK. Ammonium and Guanidinium Functionalized Hydrogels as Bile Acid Sequestrants: Synthesis, Characterization, and Biological Properties. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2004. [DOI: 10.1081/ma-120028203] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Syntheses of hydrophobically modified cationic hydrogels by copolymerization of alkyl substituted diallylamine monomers and their use as bile acid sequestrants. Eur Polym J 2004. [DOI: 10.1016/j.eurpolymj.2003.11.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Abstract
Bile acids derived from cholesterol and oxysterols derived from cholesterol and bile acid synthesis pathways are signaling molecules that regulate cholesterol homeostasis in mammals. Many nuclear receptors play pivotal roles in the regulation of bile acid and cholesterol metabolism. Bile acids activate the farnesoid X receptor (FXR) to inhibit transcription of the gene for cholesterol 7alpha-hydroxylase, and stimulate excretion and transport of bile acids. Therefore, FXR is a bile acid sensor that protects liver from accumulation of toxic bile acids and xenobiotics. Oxysterols activate the liver orphan receptors (LXR) to induce cholesterol 7alpha-hydroxylase and ATP-binding cassette family of transporters and thus promote reverse cholesterol transport from the peripheral tissues to the liver for degradation to bile acids. LXR also induces the sterol response element binding protein-1c that regulates lipogenesis. Therefore, FXR and LXR play critical roles in coordinate control of bile acid, cholesterol, and triglyceride metabolism to maintain lipid homeostasis. Nuclear receptors and bile acid/oxysterol-regulated genes are potential targets for developing drug therapies for lowering serum cholesterol and triglycerides and treating cardiovascular and liver diseases.
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Affiliation(s)
- John Y L Chiang
- Department of Biochemistry and Molecular Pathology, Northeastern Ohio Universities College of Medicine, Rootstown, Ohio 44272, USA.
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Zhu XX, Brizard F, Piché J, Yim CT, Brown GR. Bile Salt Anion Sorption by Polymeric Resins: Comparison of a Functionalized Polyacrylamide Resin with Cholestyramine. J Colloid Interface Sci 2000; 232:282-288. [PMID: 11097762 DOI: 10.1006/jcis.2000.7157] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cholestyramine and a cross-linked polyacrylamide resin with lateral alkyl quaternary ammonium groups (QPDA12) were used to study their ability to bind several bile salt anions (including the cholate, glycocholate, taurocholate, and chenodeoxycholate), individually and competitively, from phosphate buffer solutions at room temperature. The latter resin showed high affinities for all the bile salt anions examined, while cholestyramine exhibited a high affinity only for the more hydrophobic chenodeoxycholate. However, for the binding with cholestyramine, cooperative effects were more pronounced, leading to the enhancement of sorption at higher concentrations. The Langmuir equation and its modified versions were used in the interpretation of both individual and competitive binding of bile salts. The data from competitive binding studies indicated that the presence of the tightly bound chenodeoxycholate did not significantly diminish the ability of QPDA12 resin to bind cholate. However, for cholestyramine, the sorption of chenodeoxycholate increased the relative binding affinity for the more hydrophilic cholate, revealing a novel "cooperative" effect involving different bile salt anions. The latter results suggest that the observed higher affinity of QPDA12 is brought about predominantly through the hydrophobic interactions with the pendant alkyl groups rather than with the resin backbone. Copyright 2000 Academic Press.
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Affiliation(s)
- XX Zhu
- Département de chimie, Université de Montréal, succursale Centre-ville, Montréal, Quebec, H3C 3J7, Canada
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Nichifor M, Cristea D, Carpov A. Sodium cholate sorption on cationic dextran hydrogel microspheres. 1. Influence of the chemical structure of functional groups. Int J Biol Macromol 2000; 28:15-21. [PMID: 11033173 DOI: 10.1016/s0141-8130(00)00145-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
New hydrogel microspheres based on crosslinked dextran, containing pendant quaternary ammonium groups with different chemical structures have been synthesized and tested as possible bile acid sorbents The in vitro sodium cholate sorption by these hydrogels has been followed in the absence or in the presence of competing anions The sorption results have indicated a strong influence of the chemical structure of functional groups on both the affinity and selectivity towards cholate ions. The best sorption performances were obtained with hydrogels having in the structure of functional groups an alkyl substituent with the length higher than C(8).
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Affiliation(s)
- M Nichifor
- Institute of Macromolecular Chemistry 'Petru Poni', Aleea Grigore Ghica Voda 41 A, 6600, Iasi, Romania.
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Boehler N, Riottot M, Férézou J, Souidi M, Milliat F, Sérougne C, Smith JL, Lutton C. Antilithiasic effect of β-cyclodextrin in LPN hamster: comparison with cholestyramine. J Lipid Res 1999. [DOI: 10.1016/s0022-2275(20)32152-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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