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Abuhassan Q, Silva MI, Tamimi RAR, Khadra I, Batchelor HK, Pyper K, Halbert GW. A novel simulated media system for in vitro evaluation of bioequivalent intestinal drug solubility. Eur J Pharm Biopharm 2024; 199:114302. [PMID: 38657741 DOI: 10.1016/j.ejpb.2024.114302] [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: 03/26/2024] [Revised: 04/15/2024] [Accepted: 04/21/2024] [Indexed: 04/26/2024]
Abstract
Orally administered solid drug must dissolve in the gastrointestinal tract before absorption to provide a systemic response. Intestinal solubility is therefore crucial but difficult to measure since human intestinal fluid (HIF) is challenging to obtain, varies between fasted (Fa) and fed (Fe) states and exhibits inter and intra subject variability. A single simulated intestinal fluid (SIF) cannot reflect HIF variability, therefore current approaches are not optimal. In this study we have compared literature Fa/FeHIF drug solubilities to values measured in a novel in vitro simulated nine media system for either the fasted (Fa9SIF) or fed (Fe9SIF) state. The manuscript contains 129 literature sampled human intestinal fluid equilibrium solubility values and 387 simulated intestinal fluid equilibrium solubility values. Statistical comparison does not detect a difference (Fa/Fe9SIF vs Fa/FeHIF), a novel solubility correlation window enclosed 95% of an additional literature Fa/FeHIF data set and solubility behaviour is consistent with previous physicochemical studies. The Fa/Fe9SIF system therefore represents a novel in vitro methodology for bioequivalent intestinal solubility determination. Combined with intestinal permeability this provides an improved, population based, biopharmaceutical assessment that guides formulation development and indicates the presence of food based solubility effects. This transforms predictive ability during drug discovery and development and may represent a methodology applicable to other multicomponent fluids where no single component is responsible for performance.
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Affiliation(s)
- Qamar Abuhassan
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom; Department of Pharmaceutics and Pharmaceutical Technology, School of Pharmacy, University of Jordan, Amman 11942, Jordan
| | - Maria Inês Silva
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Rana Abu-Rajab Tamimi
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Ibrahim Khadra
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Hannah K Batchelor
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Kate Pyper
- Department of Mathematics and Statistics, University of Strathclyde, Livingstone Tower, 26 Richmond Street, Glasgow G1 1XH, United Kingdom
| | - Gavin W Halbert
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom.
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2
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Jia W, Li Y, Cheung KCP, Zheng X. Bile acid signaling in the regulation of whole body metabolic and immunological homeostasis. SCIENCE CHINA. LIFE SCIENCES 2024; 67:865-878. [PMID: 37515688 DOI: 10.1007/s11427-023-2353-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 04/23/2023] [Indexed: 07/31/2023]
Abstract
Bile acids (BAs) play a crucial role in nutrient absorption and act as key regulators of lipid and glucose metabolism and immune homeostasis. Through the enterohepatic circulation, BAs are synthesized, metabolized, and reabsorbed, with a portion entering the vascular circulation and distributing systemically. This allows BAs to interact with receptors in all major organs, leading to organ-organ interactions that regulate both local and global metabolic processes, as well as the immune system. This review focuses on the whole-body effects of BA-mediated metabolic and immunological regulation, including in the brain, heart, liver, intestine, eyes, skin, adipose tissue, and muscle. Targeting BA synthesis and receptor signaling is a promising strategy for the development of novel therapies for various diseases throughout the body.
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Affiliation(s)
- Wei Jia
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.
| | - Yitao Li
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
| | - Kenneth C P Cheung
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
| | - Xiaojiao Zheng
- Center for Translational Medicine and Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China.
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3
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Silva MI, Khadra I, Pyper K, Halbert GW. Structured solubility behaviour in fed simulated intestinal fluids. Eur J Pharm Biopharm 2023; 193:58-73. [PMID: 37890541 DOI: 10.1016/j.ejpb.2023.10.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 10/03/2023] [Accepted: 10/23/2023] [Indexed: 10/29/2023]
Abstract
Intestinal drug solubility is a key parameter controlling absorption after the administration of a solid oral dosage form. The ability to measure fed state solubility in vitro is limited and multiple simulated intestinal fluid recipes have been developed but with no consensus which is optimal. This study has utilised nine bioequivalent simulated fed intestinal media recipes that cover over 90% of the compositional variability of sampled fed human intestinal fluid. The solubility of 24 drugs (Acidic; furosemide, ibuprofen, indomethacin, mefenamic acid, naproxen, phenytoin, piroxicam, valsartan, zafirlukast: Basic; aprepitant, atazanavir, bromocriptine, carvedilol, dipyridamole, posaconazole, tadalafil: Neutral; acyclovir, carbamazepine, felodipine, fenofibrate, griseofulvin, itraconazole, paracetamol, probucol) has been assessed to determine if structured solubility behaviour is present. The measured solubility behaviour can be split into four categories and is consistent with drug physicochemical properties and previous solubility studies. For acidic drugs (category 1) solubility is controlled by media pH and the lowest and highest pH media identify the lowest and highest solubility in 90% of cases. For weakly acidic, basic and neutral drugs (category 2) solubility is controlled by media pH and total amphiphile concentration (TAC), a consistent solubility pattern is evident with variation related to individual drug media component interactions. The lowest and highest pH × TAC media identify the lowest and highest solubility in 70% and 90% of cases respectively. Four drugs, which are non-ionised in the media systems (category 3), have been identified with a very narrow solubility range, indicating minimal impact of the simulated media on solubility. Three drugs exhibit solubility behaviour that is not consistent with the remainder (category 4). The results indicate that the use of two bioequivalent fed intestinal media from the original nine will identify in vitro the maximum and minimum solubility values for the majority of drugs and due to the media derivation this is probably applicable in vivo. When combined with a previous fasted study, this introduces interesting possibilities to measure a solubility range in vitro that can provide Quality by Design based decisions to rationalise drug and formulation development. Overall this indicates that the multi-dimensional media system is worthy of further investigation as in vitro tool to assess fed intestinal solubility.
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Affiliation(s)
- Maria Inês Silva
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Ibrahim Khadra
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Kate Pyper
- Department of Mathematics and Statistics, University of Strathclyde, Livingstone Tower, 26 Richmond Street, Glasgow G1 1XH, United Kingdom
| | - Gavin W Halbert
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom.
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Wang K, Amidon GL, Smith DE. Physiological Dynamics in the Upper Gastrointestinal Tract and the Development of Gastrointestinal Absorption Models for the Immediate-Release Oral Dosage Forms in Healthy Adult Human. Pharm Res 2023; 40:2607-2626. [PMID: 37783928 DOI: 10.1007/s11095-023-03597-8] [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: 05/31/2023] [Accepted: 08/26/2023] [Indexed: 10/04/2023]
Abstract
This review is a revisit of various oral drug absorption models developed in the past decades, focusing on how to incorporate the physiological dynamics in the upper gastrointestinal (GI) tract. For immediate-release oral drugs, GI absorption is a critical input of drug exposure and subsequent human body response, yet difficult to model largely due to the complex GI environment. One of the biggest hurdles lies at capturing the high within-subject variability (WSV) of bioavailability measures, which can be mechanistically explained by the GI physiological dynamics. A thorough summary of how GI dynamics is handled in the absorption models would promote the development of mechanism-based oral drug absorption models, aid in the design of clinical studies regarding dosing regimens and bioequivalence studies based on WSV, and advance the decision-making on formulation selection.
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Affiliation(s)
- Kai Wang
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, 48109, USA.
| | - Gordon L Amidon
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, 48109, USA
| | - David E Smith
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, 48109, USA
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5
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Kesharwani SS, Ibrahim F. A Combined In-Vitro and GastroPlus® Modeling to Study the Effect of Intestinal Precipitation on Cinnarizine Plasma Profile in a Fasted State. AAPS PharmSciTech 2023; 24:121. [PMID: 37173520 DOI: 10.1208/s12249-023-02577-w] [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: 02/13/2023] [Accepted: 05/01/2023] [Indexed: 05/15/2023] Open
Abstract
Poorly water-soluble weak base molecules such as cinnarizine often exhibit pH-dependent solubility within the gastrointestinal tract. This means that their solubility can be influenced by the pH of the surrounding environment, and this can affect their oral absorption. The differential pH solubility between the fasted-state stomach and intestine is an important consideration when studying the oral absorption of cinnarizine. Cinnarizine has moderate permeability and is known to exhibit supersaturation and precipitation in fasted-state simulated intestinal fluid (FaSSIF), which can significantly impact its oral absorption. The present work is aimed at studying the precipitation behavior of cinnarizine in FaSSIF using biorelevant in vitro tools and GastroPlus® modeling, to identify the factors contributing to the observed variability in clinical plasma profiles. The study found that cinnarizine demonstrated variable precipitation rates under different bile salt concentrations, which could impact the concentration of the drug available for absorption. The results also showed that a precipitation-integrated modeling approach accurately predicted the mean plasma profiles from the clinical studies. The study concluded that intestinal precipitation may be one of the factors contributing to the observed variability in Cmax but not the AUC of cinnarizine. The study further suggests that the integration of experimental precipitation results representing a wider range of FaSSIF conditions would increase the probability of predicting some of the observed variability in clinical results. This is important for biopharmaceutics scientists, as it can help them evaluate the risk of in vivo precipitation impacting drug and/or drug product performance.
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Affiliation(s)
- Siddharth S Kesharwani
- US Early Development Biopharmacy, Synthetics Platform, Sanofi, 350 Water Street, MA, 02141, Cambridge, USA
| | - Fady Ibrahim
- US Early Development Biopharmacy, Synthetics Platform, Sanofi, 350 Water Street, MA, 02141, Cambridge, USA.
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Li T, Han K, Feng G, Guo J, Wang J, Wan Z, Wu X, Yang X. Bile Acid Profile Influences Digestion Resistance and Antigenicity of Soybean 7S Protein. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:2999-3009. [PMID: 36723618 DOI: 10.1021/acs.jafc.2c07687] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Soybean 7S storage protein (β-conglycinin) is the most important allergen, exhibits resistance in gastrointestinal (GI) digestion, and causes allergies in humans and animals. A previous study has demonstrated that 7S proteins contained innate amyloid aggregates, but the fate of these specific protein aggregates in intestinal digestion and correlation to allergenicity are unclear. In this study, via a modified INFOGEST static in vitro digestion and IgE binding test, we illustrate that the survived amyloid aggregates of soybean 7S protein in GI digestion might be dominant IgE epitopes of soybean protein in humans. The impact of conjugated primary bile acid salt (BS) profile on digestion resistance and immunogenicity of soybean protein is assessed, regarding the binding affinity of BS to protein aggregates with consideration of the BS composition and the physiologically relevant colloidal structure. The results show that chenodeoxycholate-containing colloidal structures exhibit high affinity and unfolding capacity to protein amyloid aggregates, promoting proteolysis by pancreatic enzymes and thus mitigating the antigenicity of soybean protein. This study presents a novel understanding of bile acid profile and colloidal structure influence on the digestibility and antigenicity of dietary proteins. It should be helpful to design in vitro digestion protocol and accurately replicate physiologically relevant digestion conditions.
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Affiliation(s)
- Tanghao Li
- Laboratory of Food Proteins and Colloids, School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
| | - Kaining Han
- Laboratory of Food Proteins and Colloids, School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
| | - Guangxin Feng
- Laboratory of Food Proteins and Colloids, School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
| | - Jian Guo
- Laboratory of Food Proteins and Colloids, School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
| | - Jinmei Wang
- Laboratory of Food Proteins and Colloids, School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
| | - Zhili Wan
- Laboratory of Food Proteins and Colloids, School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
| | - Xuli Wu
- School of Public Health, Health Science Center, Shenzhen University, Shenzhen 518060, China
| | - Xiaoquan Yang
- Laboratory of Food Proteins and Colloids, School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
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7
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Kambayashi A, Shirasaka Y. Food effects on gastrointestinal physiology and drug absorption. Drug Metab Pharmacokinet 2023; 48:100488. [PMID: 36737277 DOI: 10.1016/j.dmpk.2022.100488] [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: 10/12/2022] [Revised: 12/01/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022]
Abstract
Food ingestion affects the oral absorption of many drugs in humans. In this review article, we summarize the physiological factors in the gastrointestinal (GI) tract that affect the in vivo performance of orally administered solid dosage forms in fasted and fed states in humans. In particular, we discuss the effects of food ingestion on fluid characteristics (pH, bile concentration, and volume) in the stomach and small intestine, GI transit of water and dosage forms, and microbiota. Additionally, case examples of food effects on GI physiology and subsequent changes in oral drug absorption are provided. Furthermore, the effects of food, especially fruit juices (e.g., grapefruit, orange, apple) and green tea, on transporter-mediated permeation and enzyme-catalyzed metabolism of drugs in intestinal epithelial cells are also summarized comprehensively.
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Affiliation(s)
- Atsushi Kambayashi
- Pharmaceutical Research and Technology Labs, Astellas Pharma Inc., 180 Ozumi, Yaizu, Shizuoka, 425-0072, Japan; School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Yoshiyuki Shirasaka
- Faculty of Pharmacy, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan.
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8
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Effect of the Production Parameters and In Vitro Digestion on the Content of Polyphenolic Compounds, Phenolic Acids, and Antiradical Properties of Innovative Snacks Enriched with Wild Garlic ( Allium ursinum L.) Leaves. Int J Mol Sci 2022; 23:ijms232214458. [PMID: 36430937 PMCID: PMC9692538 DOI: 10.3390/ijms232214458] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/15/2022] [Accepted: 11/19/2022] [Indexed: 11/23/2022] Open
Abstract
A new type of corn snack has been created containing additions of wild garlic (Allium ursinum L.). This medicinal and dietary plant has a long tradition of use in folk medicine. However, studies on wild garlic composition and activity are fairly recent and scarce. This research aimed to investigate the influence of the screw speed and A. ursinum amounts on the antiradical properties as well as the content of polyphenolic compounds and individual phenolic acids of innovative snacks enriched with wild garlic leaves. The highest radical scavenging activity and content of polyphenols and phenolic acids were found in the snacks enriched with 4% wild garlic produced using screw speed 120 rpm. The obtained findings demonstrated that snacks enriched with wild garlic are a rich source of polyphenolic compounds. Since the concentration of such compounds is affected by many factors, e.g., plant material, presence of other compounds, and digestion, the second aim of this study was to determine radical scavenging activity, the content of polyphenols, and individual phenolic acids of snacks after in vitro simulated gastrointestinal digestion. Using an in vitro two-stage model, authors noted a significant difference between the concentration of polyphenolic compounds and the polyphenol content of the plant material before digestion.
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9
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Molecular and in vivo studies of a glutamate-class prolyl-endopeptidase for coeliac disease therapy. Nat Commun 2022; 13:4446. [PMID: 35915115 PMCID: PMC9343461 DOI: 10.1038/s41467-022-32215-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 07/21/2022] [Indexed: 11/25/2022] Open
Abstract
The digestion of gluten generates toxic peptides, among which a highly immunogenic proline-rich 33-mer from wheat α-gliadin, that trigger coeliac disease. Neprosin from the pitcher plant is a reported prolyl endopeptidase. Here, we produce recombinant neprosin and its mutants, and find that full-length neprosin is a zymogen, which is self-activated at gastric pH by the release of an all-β pro-domain via a pH-switch mechanism featuring a lysine plug. The catalytic domain is an atypical 7+8-stranded β-sandwich with an extended active-site cleft containing an unprecedented pair of catalytic glutamates. Neprosin efficiently degrades both gliadin and the 33-mer in vitro under gastric conditions and is reversibly inactivated at pH > 5. Moreover, co-administration of gliadin and the neprosin zymogen at the ratio 500:1 reduces the abundance of the 33-mer in the small intestine of mice by up to 90%. Neprosin therefore founds a family of eukaryotic glutamate endopeptidases that fulfils requisites for a therapeutic glutenase. Celiac disease is characterized by intolerance to gluten, a cereal protein. Here, the authors show that neprosin, a glutamate peptidase from the pitcher plant, efficiently cleaves gluten components under physiological conditions in vitro and in the gut of mice.
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10
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Orlistat disposition in the human jejunum and the effect of lipolysis inhibition on bile salt concentrations and composition. Int J Pharm 2022; 621:121807. [DOI: 10.1016/j.ijpharm.2022.121807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 04/30/2022] [Accepted: 05/02/2022] [Indexed: 11/21/2022]
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11
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Lex TR, Rodriguez JD, Zhang L, Jiang W, Gao Z. Development of In Vitro Dissolution Testing Methods to Simulate Fed Conditions for Immediate Release Solid Oral Dosage Forms. AAPS J 2022; 24:40. [PMID: 35277760 DOI: 10.1208/s12248-022-00690-5] [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: 08/20/2021] [Accepted: 02/10/2022] [Indexed: 11/30/2022] Open
Abstract
In vitro dissolution testing is widely used to mimic and predict in vivo performance of oral drug products in the gastrointestinal (GI) tract. This literature review assesses the current in vitro dissolution methodologies being employed to simulate and predict in vivo drug dissolution under fasted and fed conditions, with emphasis on immediate release (IR) solid oral dosage forms. Notable human GI physiological conditions under fasted and fed states have been reviewed and summarized. Literature results showed that dissolution media, mechanical forces, and transit times are key dissolution test parameters for simulating specific postprandial conditions. A number of biorelevant systems, including the fed stomach model (FSM), GastroDuo device, dynamic gastric model (DGM), simulated gastrointestinal tract models (TIM), and the human gastric simulator (HGS), have been developed to mimic the postprandial state of the stomach. While these models have assisted in expanding physiological relevance of in vitro dissolution tests, in general, these models lack the ability to fully replicate physiological conditions/processes. Furthermore, the translatability of in vitro data to an in vivo system remains challenging. Additionally, physiologically based pharmacokinetic (PBPK) modeling has been employed to evaluate the effect of food on drug bioavailability and bioequivalence. Here, we assess the current status of in vitro dissolution methodologies and absorption PBPK modeling approaches to identify knowledge gaps and facilitate further development of in vitro dissolution methods that factor in fasted and fed states. Prediction of in vivo drug performance under fasted and fed conditions via in vitro dissolution testing and modeling may potentially help efforts in harmonizing global regulatory recommendations regarding in vivo fasted and fed bioequivalence studies for solid oral IR products.
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Affiliation(s)
- Timothy R Lex
- Division of Complex Drug Analysis, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, St. Louis, Missouri, 63110, USA
| | - Jason D Rodriguez
- Division of Complex Drug Analysis, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, St. Louis, Missouri, 63110, USA
| | - Lei Zhang
- Office of Research and Standards, Office of Generic Drugs, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, Maryland, 20993, USA
| | - Wenlei Jiang
- Office of Research and Standards, Office of Generic Drugs, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, Maryland, 20993, USA.
| | - Zongming Gao
- Division of Complex Drug Analysis, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, St. Louis, Missouri, 63110, USA.
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12
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Wollmer E, Ungell AL, Nicolas JM, Klein S. Review of paediatric gastrointestinal physiology relevant to the absorption of orally administered medicines. Adv Drug Deliv Rev 2022; 181:114084. [PMID: 34929252 DOI: 10.1016/j.addr.2021.114084] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 11/13/2021] [Accepted: 12/13/2021] [Indexed: 12/11/2022]
Abstract
Despite much progress in regulations to improve paediatric drug development, there remains a significant need to develop better medications for children. For the design of oral dosage forms, a detailed understanding of the specific gastrointestinal (GI) conditions in children of different age categories and how they differ from GI conditions in adults is essential. Several review articles have been published addressing the ontogeny of GI characteristics, including luminal conditions in the GI tract of children. However, the data reported in most of these reviews are of limited quality because (1) information was cited from very old publications and sometimes low quality sources, (2) data gaps in the original data were filled with textbook knowledge, (3) data obtained on healthy and sick children were mixed, (4) average data obtained on groups of patients were mixed with data obtained on individual patients, and (5) results obtained using investigative techniques that may have altered the outcome of the respective studies were considered. Consequently, many of these reviews draw conclusions that may be incorrect. The aim of the present review was to provide a comprehensive and updated overview of the available original data on the ontogeny of GI luminal conditions relevant to oral drug absorption in the paediatric population. To this end, the PubMed and Web of Science metadatabases were searched for appropriate studies that examined age-related conditions in the oral cavity, esophagus, stomach, small intestine, and colon. Maturation was observed for several GI parameters, and corresponding data sets were identified for each paediatric age group. However, it also became clear that the ontogeny of several GI traits in the paediatric population is not yet known. The review article provides a robust and valuable data set for the development of paediatric in vitro and in silico biopharmaceutical tools to support the development of age-appropriate dosage forms. In addition, it provides important information on existing data gaps and should provide impetus for further systematic and well-designed in vivo studies on GI physiology in children of specific age groups in order to close existing knowledge gaps and to sustainably improve oral drug therapy in children.
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13
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Lemos HD, Prado LD, Rocha HVA. Use of biorelevant dissolution media in dissolution tests as a predictive method of oral bioavailability. BRAZ J PHARM SCI 2022. [DOI: 10.1590/s2175-97902022e19759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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14
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O'Farrell C, Stamatopoulos K, Simmons M, Batchelor H. In vitro models to evaluate ingestible devices: Present status and current trends. Adv Drug Deliv Rev 2021; 178:113924. [PMID: 34390774 DOI: 10.1016/j.addr.2021.113924] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 08/03/2021] [Accepted: 08/09/2021] [Indexed: 12/14/2022]
Abstract
Orally ingestible medical devices offer significant opportunity in the diagnosis and treatment of gastrointestinal conditions. Their development necessitates the use of models that simulate the gastrointestinal environment on both a macro and micro scale. An evolution in scientific technology has enabled a wide range of in vitro, ex vivo and in vivo models to be developed that replicate the gastrointestinal tract. This review describes the landscape of the existing range of in vitro tools that are available to characterize ingestible devices. Models are presented with details on their benefits and limitations with regards to the evaluation of ingestible devices and examples of their use in the evaluation of such devices is presented where available. The multitude of models available provides a suite of tools that can be used in the evaluation of ingestible devices that should be selected on the functionality of the device and the mechanism of its function.
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Affiliation(s)
- Connor O'Farrell
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Konstantinos Stamatopoulos
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK; Biopharmaceutics, Pharmaceutical Development, PDS, MST, RD Platform Technology & Science, GSK, David Jack Centre, Park Road, Ware, Hertfordshire SG12 0DP, UK
| | - Mark Simmons
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Hannah Batchelor
- Strathclyde Institute of Pharmacy and Biomedical Sciences, 161 Cathedral Street, Glasgow G4 0RE, UK.
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15
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Dening TJ, Douglas JT, Hageman MJ. Do Macrocyclic Peptide Drugs Interact with Bile Salts under Simulated Gastrointestinal Conditions? Mol Pharm 2021; 18:3086-3098. [PMID: 34255531 DOI: 10.1021/acs.molpharmaceut.1c00309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Peptide drugs face several barriers to oral delivery, including enzymatic degradation in the gastrointestinal tract and low membrane permeability. Importantly, the direct interaction between various biorelevant colloids (i.e., bile salt micelles and bile salt-phospholipid mixed micelles) present in the aqueous gastrointestinal environment and peptide drug molecules has not been studied. In this work, we systematically characterized interactions between a water-soluble model peptide drug, octreotide, and a range of physiologically relevant bile salts in solution. Octreotide membrane flux in pure bile salt solutions and commercially available biorelevant media, i.e., fasted state simulated intestinal fluid (FaSSIF) and fed state simulated intestinal fluid (FeSSIF), was evaluated using a side-by-side diffusion cell equipped with a cellulose dialysis membrane. All seven micellar bile salt solutions as well as FaSSIF and FeSSIF decreased octreotide membrane flux, and dihydroxy bile salts were found to have a much larger effect than trihydroxy bile salts. An inverse relationship between octreotide membrane flux and pancreatic enzymatic stability was also observed; bile salt micelles and bile salt-phospholipid mixed micelles provided a protective effect toward enzymatic degradation and prolonged octreotide half-life in vitro. Diffusion ordered nuclear magnetic resonance (DOSY NMR) spectroscopy and dynamic light scattering (DLS) were used as complementary experimental techniques to confirm peptide-micelle interactions in solution. Experiments were also performed using desmopressin as a second model peptide drug; desmopressin interacted with bile salts in solution, albeit to a lower extent relative to octreotide. The findings described herein demonstrate that amphiphilic, water-soluble peptide drugs do interact with bile salts and phospholipids in solution, with an effect on peptide membrane flux and enzymatic stability. Correspondingly, oral peptide drug absorption and bioavailability may be impacted.
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Affiliation(s)
- Tahnee J Dening
- Department of Pharmaceutical Chemistry, School of Pharmacy, The University of Kansas, 2093 Constant Avenue, Lawrence, Kansas 66047, United States
| | - Justin T Douglas
- Nuclear Magnetic Resonance Core Laboratory, The University of Kansas, Lawrence, Kansas 66047, United States
| | - Michael J Hageman
- Department of Pharmaceutical Chemistry, School of Pharmacy, The University of Kansas, 2093 Constant Avenue, Lawrence, Kansas 66047, United States
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16
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Jereb R, Opara J, Bajc A, Petek B. Evaluating the Impact of Physiological Properties of the Gastrointestinal Tract On Drug In Vivo Performance Using Physiologically Based Biopharmaceutics Modeling and Virtual Clinical Trials. J Pharm Sci 2021; 110:3069-3081. [PMID: 33878322 DOI: 10.1016/j.xphs.2021.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/12/2021] [Accepted: 04/12/2021] [Indexed: 12/13/2022]
Abstract
The physiological properties of the gastrointestinal tract, such as pH, fluid volume, bile salt concentration, and gastrointestinal transit time, are highly variable in vivo. These properties can affect the dissolution and absorption of a drug, depending on its properties and formulation. The effect of gastrointestinal physiology on the bioperformance of a drug was studied in silico for a delayed-release pantoprazole tablet and an immediate-release dolutegravir tablet. Physiologically based absorption models were developed and virtual clinical trials were performed. Reasons for the variability in drug bioperformance between subjects were investigated, taking into account differences in gastrointestinal tract characteristics, pharmacokinetic parameters, and additional parameters (e.g., permeability). Default software parameters describing gastrointestinal physiology in the fasted and fed states, and variation in these parameters, were altered to match variability in these parameters reported in vivo. The altered model physiologies better described the variability of gastrointestinal conditions, and therefore the results of virtual trials using these physiologies are likely to be more relevant in vivo. With such altered gastrointestinal physiologies used to develop models, it is possible to obtain additional knowledge and improve the understanding of subject-formulation interactions.
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Affiliation(s)
- Rebeka Jereb
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva cesta 7, 1000 Ljubljana, Slovenia; Lek Pharmaceuticals d.d., a Sandoz Company, Verovškova ulica 57, 1526 Ljubljana, Slovenia.
| | - Jerneja Opara
- Lek Pharmaceuticals d.d., a Sandoz Company, Verovškova ulica 57, 1526 Ljubljana, Slovenia
| | - Aleksander Bajc
- Lek Pharmaceuticals d.d., a Sandoz Company, Verovškova ulica 57, 1526 Ljubljana, Slovenia
| | - Boštjan Petek
- Lek Pharmaceuticals d.d., a Sandoz Company, Verovškova ulica 57, 1526 Ljubljana, Slovenia
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17
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Impact of gastrointestinal tract variability on oral drug absorption and pharmacokinetics: An UNGAP review. Eur J Pharm Sci 2021; 162:105812. [PMID: 33753215 DOI: 10.1016/j.ejps.2021.105812] [Citation(s) in RCA: 125] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 02/19/2021] [Accepted: 03/16/2021] [Indexed: 12/17/2022]
Abstract
The absorption of oral drugs is frequently plagued by significant variability with potentially serious therapeutic consequences. The source of variability can be traced back to interindividual variability in physiology, differences in special populations (age- and disease-dependent), drug and formulation properties, or food-drug interactions. Clinical evidence for the impact of some of these factors on drug pharmacokinetic variability is mounting: e.g. gastric pH and emptying time, small intestinal fluid properties, differences in pediatrics and the elderly, and surgical changes in gastrointestinal anatomy. However, the link of colonic factors variability (transit time, fluid composition, microbiome), sex differences (male vs. female) and gut-related diseases (chronic constipation, anorexia and cachexia) to drug absorption variability has not been firmly established yet. At the same time, a way to decrease oral drug pharmacokinetic variability is provided by the pharmaceutical industry: clinical evidence suggests that formulation approaches employed during drug development can decrease the variability in oral exposure. This review outlines the main drivers of oral drug exposure variability and potential approaches to overcome them, while highlighting existing knowledge gaps and guiding future studies in this area.
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18
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Effinger A, McAllister M, Tomaszewska I, O'Driscoll CM, Taylor M, Gomersall S, Heaton J, Smith KL, Sarcevica I, Young SL, Fotaki N. Investigating the Impact of Crohn's Disease on the Bioaccessibility of a Lipid-Based Formulation with an In Vitro Dynamic Gastrointestinal Model. Mol Pharm 2021; 18:1530-1543. [PMID: 33656882 DOI: 10.1021/acs.molpharmaceut.0c00807] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The aim of the study was to investigate the impact of Crohn's disease (CD) on the performance of a lipid-based formulation of ciprofloxacin in a complex gastrointestinal simulator (TIM-1, TNO) and to compare the luminal environment in terms of bile salt and lipid composition in CD and healthy conditions. CD conditions were simulated in the TIM-1 system with a reduced concentration of porcine pancreatin and porcine bile. The bioaccessibility of ciprofloxacin was similar in simulated CD and healthy conditions considering its extent as well as its time course in the jejunum and ileum filtrate. Differences were observed in terms of the luminal concentration of triglycerides, monoglycerides, and fatty acids in the different TIM-1 compartments, indicating a reduction and delay in the lipolysis of formulation excipients in CD. The quantitative analysis of bile salts revealed higher concentrations for healthy conditions (standard TIM-1 fasted-state protocol) in the duodenum and jejunum TIM-1 compartments compared to published data in human intestinal fluids of healthy subjects. The reduced concentrations of bile salts in simulated CD conditions correspond to the levels observed in human intestinal fluids of healthy subjects in the fasted state.A lipidomics approach with ultra performance liquid chromatography (UPLC)/mass spectrometry (MS) has proven to be a time-efficient method to semiquantitatively analyze differences in fatty acid and bile salt levels between healthy and CD conditions. The dynamic luminal environment in CD and healthy conditions after administration of a lipid-based formulation can be simulated using the TIM-1 system. For ciprofloxacin, an altered luminal lipid composition had no impact on its performance indicating a low risk of altered performance in CD patients.
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Affiliation(s)
- Angela Effinger
- Department of Pharmacy and Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | | | | | - Caitriona M O'Driscoll
- School of Pharmacy, University College Cork, Cavanagh Pharmacy Building, Cork T12 YT20, Ireland
| | - Mark Taylor
- Pfizer Analytical Research and Development, Sandwich CT13 9NJ, U.K
| | - Steve Gomersall
- Pfizer Analytical Research and Development, Sandwich CT13 9NJ, U.K
| | - James Heaton
- Pfizer Analytical Research and Development, Sandwich CT13 9NJ, U.K
| | - Kieran L Smith
- Pfizer Analytical Research and Development, Sandwich CT13 9NJ, U.K
| | - Inese Sarcevica
- Pfizer Analytical Research and Development, Sandwich CT13 9NJ, U.K
| | - Sam L Young
- Pfizer Drug Product Design, Sandwich CT13 9NJ, U.K
| | - Nikoletta Fotaki
- Department of Pharmacy and Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, U.K
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19
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Madsen CM, Plum J, Hens B, Augustijns P, Müllertz A, Rades T. Exploring the Impact of Intestinal Fluid Components on the Solubility and Supersaturation of Danazol. J Pharm Sci 2021; 110:2479-2488. [PMID: 33428916 DOI: 10.1016/j.xphs.2020.12.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 11/10/2020] [Accepted: 12/14/2020] [Indexed: 02/06/2023]
Abstract
Eleven simulated intestinal fluids (SIF) were designed using a Design of Experiment (DoE) approach. The DoE SIF covered a range of compositions of fasted state human intestinal fluid (FaHIF) with regard to pH, bile salt (BS), and phospholipid (PL). Using the model compound danazol, the apparent crystalline solubility (aCS) and apparent amorphous solubility (aAS), as well as the supersaturation propensity was determined in the DoE SIF media. The aCS of danazol was dependent on the composition of the SIF, with PL as the main factor, and a small effect from BS and an interaction between BS and PL. From the DoE solubility data a model was derived, which could predict aCS in commercially available SIF (FaSSIF-V1 and -V2) and in a range of FaHIF. The aAS of danazol was differently affected by the SIF composition than the aCS; PL was again the main factor influencing the aAS, but interactions between BS and pH, as well as pH and PL were also important. The supersaturation propensities of danazol in the DoE SIF media were affected by the same factors as the aCS. Hence, the supersaturation behaviour and aCS of danazol, were found to be closely related.
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Affiliation(s)
- Cecilie Maria Madsen
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark; Pharmaceutical R&D, H. Lundbeck A/S, Valby, Denmark; Pharmaceutical Sciences, Janssen, Beerse, Belgium
| | - Jakob Plum
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark
| | - Bart Hens
- Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium
| | - Patrick Augustijns
- Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium
| | - Anette Müllertz
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark; Bioneer:FARMA, University of Copenhagen, Copenhagen, Denmark.
| | - Thomas Rades
- Department of Pharmacy, University of Copenhagen, Copenhagen, Denmark; Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
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20
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Pentafragka C, Vertzoni M, Dressman J, Symillides M, Goumas K, Reppas C. Characteristics of contents in the upper gastrointestinal lumen after a standard high-calorie high-fat meal and implications for the in vitro drug product performance testing conditions. Eur J Pharm Sci 2020; 155:105535. [DOI: 10.1016/j.ejps.2020.105535] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/27/2020] [Accepted: 08/28/2020] [Indexed: 12/30/2022]
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21
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Parrow A, Larsson P, Augustijns P, Bergström CAS. Molecular Dynamics Simulations on Interindividual Variability of Intestinal Fluids: Impact on Drug Solubilization. Mol Pharm 2020; 17:3837-3844. [PMID: 32787279 PMCID: PMC7704030 DOI: 10.1021/acs.molpharmaceut.0c00588] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
![]()
Efficient delivery
of oral drugs is dependent on their solubility
in human intestinal fluid, a complex and dynamic fluid that contains
colloidal structures composed of small molecules. These structures
solubilize poorly water-soluble compounds, increasing their apparent
solubility, and possibly their bioavailability. In this study, we
conducted coarse-grained molecular dynamics simulations with data
from duodenal fluid samples previously acquired from five healthy
volunteers. In these simulations, we observed the self-assembly of
mixed micelles of bile salts, phospholipids, and free fatty acids.
The micelles were ellipsoids with a size range of 4–7 nm. Next,
we investigated micelle affinities of three model drugs. The affinities
in our simulation showed the same trend as literature values for the
solubility enhancement of drugs in human intestinal fluids. This type
of simulations is useful for studies of events and interactions taking
place in the small intestinal fluid.
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Affiliation(s)
- Albin Parrow
- Department of Pharmacy, Uppsala University, Uppsala Biomedical Center, P.O. Box 580, SE-751 23 Uppsala, Sweden
| | - Per Larsson
- Department of Pharmacy, Uppsala University, Uppsala Biomedical Center, P.O. Box 580, SE-751 23 Uppsala, Sweden.,The Swedish Drug Delivery Center, Department of Pharmacy, Uppsala University, Uppsala Biomedical Center, P.O. Box 580, SE-751 23 Uppsala, Sweden
| | - Patrick Augustijns
- Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, O&N II Gasthuisberg, Herestraat 49, Box 921, 3000 Leuven, Belgium
| | - Christel A S Bergström
- Department of Pharmacy, Uppsala University, Uppsala Biomedical Center, P.O. Box 580, SE-751 23 Uppsala, Sweden.,The Swedish Drug Delivery Center, Department of Pharmacy, Uppsala University, Uppsala Biomedical Center, P.O. Box 580, SE-751 23 Uppsala, Sweden
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22
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Pyper K, Brouwers J, Augustijns P, Khadra I, Dunn C, Wilson CG, Halbert GW. Multidimensional analysis of human intestinal fluid composition. Eur J Pharm Biopharm 2020; 153:226-240. [PMID: 32585351 DOI: 10.1016/j.ejpb.2020.06.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 06/07/2020] [Accepted: 06/08/2020] [Indexed: 12/14/2022]
Abstract
The oral administration of solid dosage forms is the commonest method to achieve systemic therapy and relies on the drug's solubility in human intestinal fluid (HIF), a key factor that influences bioavailability and biopharmaceutical classification. However, HIF is difficult to obtain and is known to be variable, which has led to the development of a range of simulated intestinal fluid (SIF) systems to determine drug solubility in vitro. In this study we have applied a novel multidimensional approach to analyse and characterise HIF composition using a published data set in both fasted and fed states with a view to refining the existing SIF approaches. The data set provided 152 and 172 measurements of five variables (total bile salt, phospholipid, total free fatty acid, cholesterol and pH) in time-dependent HIF samples from 20 volunteers in the fasted and fed state, respectively. The variable data sets for both fasted state and fed state are complex, do not follow normal distributions but the amphiphilic variable concentrations are correlated. When plotted 2-dimensionally a generally ellipsoid shaped data cloud with a positive slope is revealed with boundaries that enclose published fasted or fed HIF compositions. The data cloud also encloses the majority of fasted state and fed state SIF recipes and illustrates that the structured nature of design of experiment (DoE) approaches does not optimally cover the variable space and may examine media compositions that are not biorelevant. A principal component analysis in either fasted or fed state in combination with fitting an ellipsoid shape to enclose the data results in 8 points that capture over 95% of the compositional variability of HIF. The variable's average rate of concentration change in both fasted state and fed state over a short time scale (10 min) is zero and a Euclidean analysis highlights differences between the fasted and fed states and among individual volunteers. The results indicate that a 9-point DoE (8 + 1 central point) could be applied to investigate drug solubility in vitro and provide statistical solubility limits. In addition, a single point could provide a worst-case solubility measurement to define the lowest biopharmaceutical classification boundary or for use during drug development. This study has provided a novel description of HIF composition. The approach could be expanded in multiple ways by incorporation of further data sets to improve the statistical coverage or to cover specific patient groups (e.g., paediatric). Further development might also be possible to analyse information on the time dependent behaviour of HIF and to guide HIF sampling and analysis protocols.
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Affiliation(s)
- Kate Pyper
- Department of Mathematics and Statistics, University of Strathclyde, Livingstone Tower, 26 Richmond Street, Glasgow G1 1XH, United Kingdom
| | - Joachim Brouwers
- Drug Delivery and Disposition, KU Leuven, ON2, Herestraat 49 Box 921, 3000 Leuven, Belgium
| | - Patrick Augustijns
- Drug Delivery and Disposition, KU Leuven, ON2, Herestraat 49 Box 921, 3000 Leuven, Belgium
| | - I Khadra
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - C Dunn
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - C G Wilson
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - G W Halbert
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom.
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23
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Ahmad TR, Higuchi S, Bertaggia E, Hung A, Shanmugarajah N, Guilz NC, Gamarra JR, Haeusler RA. Bile acid composition regulates the manganese transporter Slc30a10 in intestine. J Biol Chem 2020; 295:12545-12558. [PMID: 32690612 DOI: 10.1074/jbc.ra120.012792] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 07/10/2020] [Indexed: 12/11/2022] Open
Abstract
Bile acids (BAs) comprise heterogenous amphipathic cholesterol-derived molecules that carry out physicochemical and signaling functions. A major site of BA action is the terminal ileum, where enterocytes actively reuptake BAs and express high levels of BA-sensitive nuclear receptors. BA pool size and composition are affected by changes in metabolic health, and vice versa. One of several factors that differentiate BAs is the presence of a hydroxyl group on C12 of the steroid ring. 12α-Hydroxylated BAs (12HBAs) are altered in multiple disease settings, but the consequences of 12HBA abundance are incompletely understood. We employed mouse primary ileum organoids to investigate the transcriptional effects of varying 12HBA abundance in BA pools. We identified Slc30a10 as one of the top genes differentially induced by BA pools with varying 12HBA abundance. SLC30A10 is a manganese efflux transporter critical for whole-body manganese excretion. We found that BA pools, especially those low in 12HBAs, induce cellular manganese efflux and that Slc30a10 induction by BA pools is driven primarily by lithocholic acid signaling via the vitamin D receptor. Administration of lithocholic acid or a vitamin D receptor agonist resulted in increased Slc30a10 expression in mouse ileum epithelia. These data demonstrate a previously unknown role for BAs in intestinal control of manganese homeostasis.
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Affiliation(s)
- Tiara R Ahmad
- Department of Pathology and Cell Biology, Columbia University, New York, New York, USA.,Naomi Berrie Diabetes Center, Columbia University, New York, New York, USA
| | - Sei Higuchi
- Department of Pathology and Cell Biology, Columbia University, New York, New York, USA.,Naomi Berrie Diabetes Center, Columbia University, New York, New York, USA
| | - Enrico Bertaggia
- Department of Pathology and Cell Biology, Columbia University, New York, New York, USA.,Naomi Berrie Diabetes Center, Columbia University, New York, New York, USA
| | - Allison Hung
- Naomi Berrie Diabetes Center, Columbia University, New York, New York, USA
| | - Niroshan Shanmugarajah
- Department of Pathology and Cell Biology, Columbia University, New York, New York, USA.,Naomi Berrie Diabetes Center, Columbia University, New York, New York, USA
| | - Nicole C Guilz
- Naomi Berrie Diabetes Center, Columbia University, New York, New York, USA
| | - Jennifer R Gamarra
- Naomi Berrie Diabetes Center, Columbia University, New York, New York, USA
| | - Rebecca A Haeusler
- Department of Pathology and Cell Biology, Columbia University, New York, New York, USA .,Naomi Berrie Diabetes Center, Columbia University, New York, New York, USA
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24
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Broesder A, Kosta AMMAC, Woerdenbag HJ, Nguyen DN, Frijlink HW, Hinrichs WLJ. pH-dependent ileocolonic drug delivery, part II: preclinical evaluation of novel drugs and novel excipients. Drug Discov Today 2020; 25:1374-1388. [PMID: 32562842 DOI: 10.1016/j.drudis.2020.06.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 05/18/2020] [Accepted: 06/08/2020] [Indexed: 01/18/2023]
Abstract
Novel drugs and novel excipients in pH-dependent ileocolonic drug delivery systems have to be tested in animals. Which animal species are suitable and what in vivo methods are used to verify ileocolonic drug delivery?
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Affiliation(s)
- Annemarie Broesder
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Anne-Marijke M A C Kosta
- University of Groningen, University Medical Center Groningen, Department of Biomedical Sciences of Cells and Systems, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Herman J Woerdenbag
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Duong N Nguyen
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Henderik W Frijlink
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Wouter L J Hinrichs
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands.
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25
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Broesder A, Woerdenbag HJ, Prins GH, Nguyen DN, Frijlink HW, Hinrichs WLJ. pH-dependent ileocolonic drug delivery, part I: in vitro and clinical evaluation of novel systems. Drug Discov Today 2020; 25:1362-1373. [PMID: 32554060 DOI: 10.1016/j.drudis.2020.06.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 05/18/2020] [Accepted: 06/08/2020] [Indexed: 02/07/2023]
Abstract
After the pH dependency of novel pH-dependent ileocolonic drug delivery systems is confirmed in vitro, their performance should be evaluated in human volunteers.
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Affiliation(s)
- Annemarie Broesder
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Herman J Woerdenbag
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Grietje H Prins
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Duong N Nguyen
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Henderik W Frijlink
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Wouter L J Hinrichs
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands.
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26
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Wojtunik-Kulesza K, Oniszczuk A, Oniszczuk T, Combrzyński M, Nowakowska D, Matwijczuk A. Influence of In Vitro Digestion on Composition, Bioaccessibility and Antioxidant Activity of Food Polyphenols-A Non-Systematic Review. Nutrients 2020; 12:E1401. [PMID: 32414132 PMCID: PMC7284996 DOI: 10.3390/nu12051401] [Citation(s) in RCA: 170] [Impact Index Per Article: 42.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/05/2020] [Accepted: 05/11/2020] [Indexed: 12/18/2022] Open
Abstract
There is increased interest in following a healthy lifestyle and consuming a substantial portion of secondary plant metabolites, such as polyphenols, due to their benefits for the human body. Food products enriched with various forms of fruits and vegetables are sources of pro-health components. Nevertheless, in many cases, the level of their activities is changed in in vivo conditions. The changes are strictly connected with processes in the digestive system that transfigure the structure of the active compounds and simultaneously keep or modify their biological activities. Much attention has focused on their bioavailability, a prerequisite for further physiological functions. As human studies are time consuming, costly and restricted by ethical concerns, in vitro models for investigating the effects of digestion on these compounds have been developed to predict their release from the food matrix, as well as their bioaccessibility. Most typically, models simulate digestion in the oral cavity, the stomach, the small intestine and, occasionally, the large intestine. The presented review aims to discuss the impact of in vitro digestion on the composition, bioaccessibility and antioxidant activity of food polyphenols. Additionally, we consider the influence of pH on antioxidant changes in the aforementioned substances.
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Affiliation(s)
| | - Anna Oniszczuk
- Department of Inorganic Chemistry, Medical University of Lublin, Chodźki 4a, 20-093 Lublin, Poland;
| | - Tomasz Oniszczuk
- Department of Thermal Technology and Food Process Engineering, University of Life Sciences in Lublin, Głęboka 31, 20-612 Lublin, Poland
| | - Maciej Combrzyński
- Department of Thermal Technology and Food Process Engineering, University of Life Sciences in Lublin, Głęboka 31, 20-612 Lublin, Poland
| | - Dominika Nowakowska
- Department of General Ophthalmology, Medical University of Lublin, Chmielna 1, 20-079 Lublin, Poland;
| | - Arkadiusz Matwijczuk
- Department of Physics, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland
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27
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Stamatopoulos K, Pathak SM, Marciani L, Turner DB. Population-Based PBPK Model for the Prediction of Time-Variant Bile Salt Disposition within GI Luminal Fluids. Mol Pharm 2020; 17:1310-1323. [DOI: 10.1021/acs.molpharmaceut.0c00019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Shriram M. Pathak
- Certara Ltd (Simcyp Division), Level 2-Acero, 1 Concourse Way, Sheffield S1 2BJ, United Kingdom
| | - Luca Marciani
- Nottingham Digestive Diseases Centre and National Institute for Health Research, Biomedical Research Unit, Nottingham University Hospitals, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - David B. Turner
- Certara Ltd (Simcyp Division), Level 2-Acero, 1 Concourse Way, Sheffield S1 2BJ, United Kingdom
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Ahmad TR, Haeusler RA. Bile acids in glucose metabolism and insulin signalling - mechanisms and research needs. Nat Rev Endocrinol 2019; 15:701-712. [PMID: 31616073 PMCID: PMC6918475 DOI: 10.1038/s41574-019-0266-7] [Citation(s) in RCA: 167] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/11/2019] [Indexed: 12/12/2022]
Abstract
Of all the novel glucoregulatory molecules discovered in the past 20 years, bile acids (BAs) are notable for the fact that they were hiding in plain sight. BAs were well known for their requirement in dietary lipid absorption and biliary cholesterol secretion, due to their micelle-forming properties. However, it was not until 1999 that BAs were discovered to be endogenous ligands for the nuclear receptor FXR. Since that time, BAs have been shown to act through multiple receptors (PXR, VDR, TGR5 and S1PR2), as well as to have receptor-independent mechanisms (membrane dynamics, allosteric modulation of N-acyl phosphatidylethanolamine phospholipase D). We now also have an appreciation of the range of physiological, pathophysiological and therapeutic conditions in which endogenous BAs are altered, raising the possibility that BAs contribute to the effects of these conditions on glycaemia. In this Review, we highlight the mechanisms by which BAs regulate glucose homeostasis and the settings in which endogenous BAs are altered, and provide suggestions for future research.
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Affiliation(s)
- Tiara R Ahmad
- Naomi Berrie Diabetes Center, Columbia University Medical Center, New York, NY, USA
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, USA
| | - Rebecca A Haeusler
- Naomi Berrie Diabetes Center, Columbia University Medical Center, New York, NY, USA.
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, USA.
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29
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Elkhabaz A, Moseson DE, Brouwers J, Augustijns P, Taylor LS. Interplay of Supersaturation and Solubilization: Lack of Correlation between Concentration-Based Supersaturation Measurements and Membrane Transport Rates in Simulated and Aspirated Human Fluids. Mol Pharm 2019; 16:5042-5053. [PMID: 31638397 DOI: 10.1021/acs.molpharmaceut.9b00956] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Supersaturating formulations are increasingly being used to improve the absorption of orally administered poorly water-soluble drugs. To better predict outcomes in vivo, we must be able to accurately determine the degree of supersaturation in complex media designed to provide a surrogate for the gastrointestinal environment. Herein, we demonstrate that relying on measurements based on consideration of the total dissolved concentration leads to underestimation of supersaturation and consequently membrane transport rates. Crystalline and amorphous solubilities of two compounds, atazanavir and posaconazole, were evaluated in six different media. Concurrently, diffusive flux measurements were performed in a side-by-side diffusion cell to determine the activity-based supersaturation by evaluating membrane transport rates at the crystalline and amorphous solubilities. Solubility values were found to vary in each medium because of different solubilization capacities. Concentration-based supersaturation ratios were also found to vary for the different media. Activity-based measurements, however, were largely independent of the medium, leading to relatively constant values for the estimated supersaturation. These findings have important consequences for modeling and prediction of supersaturation impact on the absorption rate as well as for better defining the thermodynamic driving force for crystallization in complex media.
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Affiliation(s)
- Ahmed Elkhabaz
- Department of Industrial and Physical Pharmacy, College of Pharmacy , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Dana E Moseson
- Department of Industrial and Physical Pharmacy, College of Pharmacy , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Joachim Brouwers
- Drug Delivery and Disposition , KU Leuven , Leuven 3000 , Belgium
| | | | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, College of Pharmacy , Purdue University , West Lafayette , Indiana 47907 , United States
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30
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Walther B, Lett AM, Bordoni A, Tomás‐Cobos L, Nieto JA, Dupont D, Danesi F, Shahar DR, Echaniz A, Re R, Fernandez AS, Deglaire A, Gille D, Schmid A, Vergères G. GutSelf: Interindividual Variability in the Processing of Dietary Compounds by the Human Gastrointestinal Tract. Mol Nutr Food Res 2019; 63:e1900677. [PMID: 31483113 PMCID: PMC6900003 DOI: 10.1002/mnfr.201900677] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 07/25/2019] [Indexed: 12/19/2022]
Abstract
Nutritional research is currently entering the field of personalized nutrition, to a large extent driven by major technological breakthroughs in analytical sciences and biocomputing. An efficient launching of the personalized approach depends on the ability of researchers to comprehensively monitor and characterize interindividual variability in the activity of the human gastrointestinal tract. This information is currently not available in such a form. This review therefore aims at identifying and discussing published data, providing evidence on interindividual variability in the processing of the major nutrients, i.e., protein, fat, carbohydrates, vitamins, and minerals, along the gastrointestinal tract, including oral processing, intestinal digestion, and absorption. Although interindividual variability is not a primary endpoint of most studies identified, a significant number of publications provides a wealth of information on this topic for each category of nutrients. This knowledge remains fragmented, however, and understanding the clinical relevance of most of the interindividual responses to food ingestion described in this review remains unclear. In that regard, this review has identified a gap and sets the base for future research addressing the issue of the interindividual variability in the response of the human organism to the ingestion of foods.
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Affiliation(s)
- Barbara Walther
- AgroscopeFederal Department of Economic AffairsEducation and Research EAER3003BerneSwitzerland
| | - Aaron M. Lett
- Section for Nutrition ResearchDepartment of MedicineImperial College LondonLondonUK
| | - Alessandra Bordoni
- Department of Agri‐Food Sciences and TechnologiesUniversity of Bologna47521CesenaItaly
| | | | | | - Didier Dupont
- UMR 1253Science et Technologie du Lait et de l'ŒufINRA35000RennesFrance
| | - Francesca Danesi
- Department of Agri‐Food Sciences and TechnologiesUniversity of Bologna47521CesenaItaly
| | - Danit R. Shahar
- Department of Public HealthThe S. Daniel Abraham International Center for Health and NutritionBen‐Gurion University of the Negev84105Beer‐ShevaIsrael
| | - Ana Echaniz
- Cambridge Food Science LtdCB23 5ABCambridgeUK
| | - Roberta Re
- Cambridge Food Science LtdCB23 5ABCambridgeUK
| | | | - Amélie Deglaire
- UMR 1253Science et Technologie du Lait et de l'ŒufINRA35000RennesFrance
| | - Doreen Gille
- AgroscopeFederal Department of Economic AffairsEducation and Research EAER3003BerneSwitzerland
| | - Alexandra Schmid
- AgroscopeFederal Department of Economic AffairsEducation and Research EAER3003BerneSwitzerland
| | - Guy Vergères
- AgroscopeFederal Department of Economic AffairsEducation and Research EAER3003BerneSwitzerland
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31
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Segregur D, Flanagan T, Mann J, Moir A, Karlsson EM, Hoch M, Carlile D, Sayah-Jeanne S, Dressman J. Impact of Acid-Reducing Agents on Gastrointestinal Physiology and Design of Biorelevant Dissolution Tests to Reflect These Changes. J Pharm Sci 2019; 108:3461-3477. [DOI: 10.1016/j.xphs.2019.06.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 06/25/2019] [Accepted: 06/25/2019] [Indexed: 02/07/2023]
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32
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Papadatou-Soulou E, Mason J, Parsons C, Oates A, Thyagarajan M, Batchelor HK. Magnetic Resonance Imaging Quantification of Gastrointestinal Liquid Volumes and Distribution in the Gastrointestinal Tract of Children. Mol Pharm 2019; 16:3896-3903. [PMID: 31373502 DOI: 10.1021/acs.molpharmaceut.9b00510] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The volume and localization of fluid in the paediatric gastrointestinal tract is crucial to the design of in vitro and in silico models that predict the absorption of oral drugs administered to children. Previous studies have used magnetic resonance imaging (MRI) to quantify fluid volumes and localization in the intestines of adults; this study is the first to undertake similar analysis of pediatric participants. This study quantified the amount and distribution of fluid in fasted and fluid-fed children using MRI data captured during the routine clinical assessment. Data from 32 fasted children (aged 0-16 years) and 23 fluid-fed children (aged 8-16 years) were evaluated. The gastric volume ranged from 0 to 9 mL in the fasted and 19-423 mL in the fluid-fed state. The small intestinal volume was recorded to be 0-51 mL in the fasted and 6-91 mL in the fluid-fed state with an average number of 7.7 and 22.4 fluid pockets, respectively. The data showed significant differences in gastric volumes and the number of fluid pockets in the small intestine for age-matched fasted and fluid-fed children (p < 0.05). Both the number and the volume of pockets reported in children are much lower than those previously reported in adults. This study is the first to report intestinal volumes and localization in children and provides new information to achieve the design of biorelevant in vitro models and real values to update in silico models. The data available from both fluid-fed and fasted children show the extremes of fluid volumes that are present in the gastro-intestinal tract which is useful to understand the variability associated with drug absorption in children.
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Affiliation(s)
- Eleni Papadatou-Soulou
- School of Pharmacy, Institute of Clinical Sciences , University of Birmingham , Edgbaston , B15 2TT , U.K
| | - Julie Mason
- School of Pharmacy, Institute of Clinical Sciences , University of Birmingham , Edgbaston , B15 2TT , U.K
| | - Caron Parsons
- University Hospitals Coventry and Warwickshire NHS Trust , Clifford Bridge Road , Coventry CV2 2DX , U.K
| | - Adam Oates
- Birmingham Children's Hospital NHS Trust , Steelhouse Lane , Birmingham B4 6NH , U.K
| | | | - Hannah Katharine Batchelor
- School of Pharmacy, Institute of Clinical Sciences , University of Birmingham , Edgbaston , B15 2TT , U.K
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33
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Cummins G, Cox BF, Ciuti G, Anbarasan T, Desmulliez MPY, Cochran S, Steele R, Plevris JN, Koulaouzidis A. Gastrointestinal diagnosis using non-white light imaging capsule endoscopy. Nat Rev Gastroenterol Hepatol 2019; 16:429-447. [PMID: 30988520 DOI: 10.1038/s41575-019-0140-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Capsule endoscopy (CE) has proved to be a powerful tool in the diagnosis and management of small bowel disorders since its introduction in 2001. However, white light imaging (WLI) is the principal technology used in clinical CE at present, and therefore, CE is limited to mucosal inspection, with diagnosis remaining reliant on visible manifestations of disease. The introduction of WLI CE has motivated a wide range of research to improve its diagnostic capabilities through integration with other sensing modalities. These developments have the potential to overcome the limitations of WLI through enhanced detection of subtle mucosal microlesions and submucosal and/or transmural pathology, providing novel diagnostic avenues. Other research aims to utilize a range of sensors to measure physiological parameters or to discover new biomarkers to improve the sensitivity, specificity and thus the clinical utility of CE. This multidisciplinary Review summarizes research into non-WLI CE devices by organizing them into a taxonomic structure on the basis of their sensing modality. The potential of these capsules to realize clinically useful virtual biopsy and computer-aided diagnosis (CADx) is also reported.
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Affiliation(s)
- Gerard Cummins
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK.
| | | | - Gastone Ciuti
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy
| | | | - Marc P Y Desmulliez
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
| | - Sandy Cochran
- School of Engineering, University of Glasgow, Glasgow, UK
| | - Robert Steele
- School of Medicine, University of Dundee, Dundee, UK
| | - John N Plevris
- Centre for Liver and Digestive Disorders, The Royal Infirmary of Edinburgh, Edinburgh, UK
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34
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Impact of regional differences along the gastrointestinal tract of healthy adults on oral drug absorption: An UNGAP review. Eur J Pharm Sci 2019; 134:153-175. [DOI: 10.1016/j.ejps.2019.04.013] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/03/2019] [Accepted: 04/09/2019] [Indexed: 02/06/2023]
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35
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Elvang PA, Bohsen MS, Stein PC, Bauer-Brandl A, Riethorst D, Brouwers J, Augustijns P, Brandl M. Co-existing colloidal phases of human duodenal aspirates: Intraindividual fluctuations and interindividual variability in relation to molecular composition. J Pharm Biomed Anal 2019; 170:22-29. [DOI: 10.1016/j.jpba.2019.03.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 03/11/2019] [Accepted: 03/13/2019] [Indexed: 10/27/2022]
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36
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Mimicking regional and fasted/fed state conditions in the intestine with the mucus-PVPA in vitro model: The impact of pH and simulated intestinal fluids on drug permeability. Eur J Pharm Sci 2019; 132:44-54. [DOI: 10.1016/j.ejps.2019.02.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 02/01/2019] [Accepted: 02/25/2019] [Indexed: 12/20/2022]
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37
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Variations in gastrointestinal lipases, pH and bile acid levels with food intake, age and diseases: Possible impact on oral lipid-based drug delivery systems. Adv Drug Deliv Rev 2019; 142:3-15. [PMID: 30926476 DOI: 10.1016/j.addr.2019.03.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 02/27/2019] [Accepted: 03/25/2019] [Indexed: 12/21/2022]
Abstract
The lipids and some surfactants present in oral lipid-based drug delivery systems are potential substrates for the various lipases involved in gastrointestinal (GI) lipolysis. The levels of these enzymes, together with pH and biliairy secretion, are important parameters that condition the fate of lipid-based formulations (LBF) and the dispersion, solubilization and absorption of lipophilic drugs in the GI tract. Since in vitro methods of digestion are now combined with dissolution assays for a better assessment of LBF performance, it is essential to have a basic knowledge on lipase, pH and bile acid (BA) levels in vivo to develop relevant in vitro models. While these parameters and their variations in healthy subjects are today well documented, in vivo data on specific populations (age groups, patients with various diseases, patients with treatment affecting GI tract parameters, …) are scarce and obtaining them from clinical studies is sometimes difficult due to ethical limitations. Here we collected some in vivo data already available on the levels of digestive lipases, gastric and intestinal pH, and BAs at various ages and in patients with exocrine pancreatic insufficiency, a pathological situation that leads to drastic changes in GI tract parameters and impacts pharmacological treatments.
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38
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Craven MD, Washabau RJ. Comparative pathophysiology and management of protein-losing enteropathy. J Vet Intern Med 2019; 33:383-402. [PMID: 30762910 PMCID: PMC6430879 DOI: 10.1111/jvim.15406] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 11/30/2018] [Indexed: 12/17/2022] Open
Abstract
Protein‐losing enteropathy, or PLE, is not a disease but a syndrome that develops in numerous disease states of differing etiologies and often involving the lymphatic system, such as lymphangiectasia and lymphangitis in dogs. The pathophysiology of lymphatic disease is incompletely understood, and the disease is challenging to manage. Understanding of PLE mechanisms requires knowledge of lymphatic system structure and function, which are reviewed here. The mechanisms of enteric protein loss in PLE are identical in dogs and people, irrespective of the underlying cause. In people, PLE is usually associated with primary intestinal lymphangiectasia, suspected to arise from genetic susceptibility, or “idiopathic” lymphatic vascular obstruction. In dogs, PLE is most often a feature of inflammatory bowel disease (IBD), and less frequently intestinal lymphangiectasia, although it is not proven which process is the true driving defect. In cats, PLE is relatively rare. Review of the veterinary literature (1977‐2018) reveals that PLE was life‐ending in 54.2% of dogs compared to published disease‐associated deaths in IBD of <20%, implying that PLE is not merely a continuum of IBD spectrum pathophysiology. In people, diet is the cornerstone of management, whereas dogs are often treated with immunosuppression for causes of PLE including lymphangiectasia, lymphangitis, and crypt disease. Currently, however, there is no scientific, extrapolated, or evidence‐based support for an autoimmune or immune‐mediated mechanism. Moreover, people with PLE have disease‐associated loss of immune function, including lymphopenia, severe CD4+ T‐cell depletion, and negative vaccinal titers. Comparison of PLE in people and dogs is undertaken here, and theories in treatment of PLE are presented.
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Affiliation(s)
- Melanie D Craven
- Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada
| | - Robert J Washabau
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota
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39
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Pentafragka C, Symillides M, McAllister M, Dressman J, Vertzoni M, Reppas C. The impact of food intake on the luminal environment and performance of oral drug products with a view to in vitro and in silico simulations: a PEARRL review. J Pharm Pharmacol 2018; 71:557-580. [DOI: 10.1111/jphp.12999] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 08/04/2018] [Indexed: 01/24/2023]
Abstract
Abstract
Objectives
Using the type of meal and dosing conditions suggested by regulatory agencies as a basis, this review has two specific objectives: first, to summarize our understanding on the impact of food intake on luminal environment and drug product performance and second, to summarize the usefulness and limitations of available in vitro and in silico methodologies for the evaluation of drug product performance after food intake.
Key findings
Characterization of the luminal environment and studies evaluating product performance in the lumen, under conditions suggested by regulatory agencies for simulating the fed state, are limited. Various in vitro methodologies have been proposed for evaluating drug product performance in the fed state, but systematic validation is lacking. Physiologically based pharmacokinetic (PBPK) modelling approaches require the use of in vitro biorelevant data and, to date, have been used primarily for investigating the mechanisms via which an already observed food effect is mediated.
Summary
Better understanding of the impact of changes induced by the meal administration conditions suggested by regulatory agencies on the luminal fate of the drug product is needed. Relevant information will be useful for optimizing the in vitro test methods and increasing the usefulness of PBPK modelling methodologies.
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Affiliation(s)
- Christina Pentafragka
- Department of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - Mira Symillides
- Department of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Jennifer Dressman
- Institute of Pharmaceutical Technology, Goethe University, Frankfurt/Main, Germany
| | - Maria Vertzoni
- Department of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - Christos Reppas
- Department of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
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40
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Humbert L, Rainteau D, Tuvignon N, Wolf C, Seksik P, Laugier R, Carrière F. Postprandial bile acid levels in intestine and plasma reveal altered biliary circulation in chronic pancreatitis patients. J Lipid Res 2018; 59:2202-2213. [PMID: 30206181 DOI: 10.1194/jlr.m084830] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 08/29/2018] [Indexed: 12/15/2022] Open
Abstract
Bile acid (BA) secretion and circulation in chronic pancreatitis (CP) patients with exocrine pancreatic insufficiency (EPI) were investigated by simultaneously measuring postprandial levels of individual BAs in duodenal contents and blood plasma using LC-MS/MS. CP patients and healthy volunteers (HVs) were intubated with gastric and duodenal tubes prior to the administration of a test meal and continuous aspiration of duodenal contents. Pancreatic lipase outputs in CP patients were very low (0.7 ± 0.2 mg) versus HVs (116.7 ± 68.1 mg; P < 0.005), thus confirming the severity of EPI. Duodenal BA outputs were reduced in CP patients (1.00 ± 0.89 mmol; 0.47 ± 0.42 g) versus HVs (5.52 ± 4.53 mmol; 2.62 ± 2.14 g; P < 0.15). Primary to secondary BA ratio was considerably higher in CP patients (38.09 ± 48.1) than HVs (4.15 ± 2.37; P < 0.15), indicating an impaired transformation of BAs by gut microbiota. BA concentrations were found below the critical micellar concentration in CP patients, while a high BA concentration peak corresponding to gallbladder emptying was evidenced in HVs. Conversely, BA plasma concentration was increased in CP patients versus HVs suggesting a cholangiohepatic shunt of BA secretion. Alterations of BA circulation and levels may result from the main biliary duct stenosis observed in these CP patients and may aggravate the consequences of EPI on lipid malabsorption.
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Affiliation(s)
- Lydie Humbert
- Sorbonne Universités, UPMC, INSERM ERL1157, CNRS UMR 7203 LBM, CHU Saint Antoine, Paris, France
| | - Dominique Rainteau
- Sorbonne Universités, UPMC, INSERM ERL1157, CNRS UMR 7203 LBM, CHU Saint Antoine, Paris, France .,Assistance Publique-Hôpitaux de Paris, PM2 Peptidomique and Métabolomique Hôpital Saint Antoine, Paris, France
| | - Noshine Tuvignon
- CNRS, Aix-Marseille Université, UMR 7281 Bioénergétique et Ingénerie des Protéines, Marseille, France.,Assistance Publique-Hôpitaux de Marseille, Service d'Hépato-gastroentérologie, Hôpital de la Timone, Marseille, France
| | | | - Philippe Seksik
- Sorbonne Universités, UPMC, INSERM ERL1157, CNRS UMR 7203 LBM, CHU Saint Antoine, Paris, France.,Service d'Hépato-gastroentérologie, Hôpital Saint Antoine, Paris, France
| | - René Laugier
- CNRS, Aix-Marseille Université, UMR 7281 Bioénergétique et Ingénerie des Protéines, Marseille, France.,Assistance Publique-Hôpitaux de Marseille, Service d'Hépato-gastroentérologie, Hôpital de la Timone, Marseille, France
| | - Frédéric Carrière
- CNRS, Aix-Marseille Université, UMR 7281 Bioénergétique et Ingénerie des Protéines, Marseille, France
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41
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Human intestinal fluid factors affecting intestinal drug permeation in vitro. Eur J Pharm Sci 2018; 121:338-346. [DOI: 10.1016/j.ejps.2018.06.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 05/16/2018] [Accepted: 06/10/2018] [Indexed: 11/24/2022]
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42
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Guimarães M, Statelova M, Holm R, Reppas C, Symilllides M, Vertzoni M, Fotaki N. Biopharmaceutical considerations in paediatrics with a view to the evaluation of orally administered drug products - a PEARRL review. ACTA ACUST UNITED AC 2018; 71:603-642. [PMID: 29971768 DOI: 10.1111/jphp.12955] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 05/28/2018] [Indexed: 12/25/2022]
Abstract
OBJECTIVES In this review, the current biopharmaceutical approaches for evaluation of oral formulation performance in paediatrics are discussed. KEY FINDINGS The paediatric gastrointestinal (GI) tract undergoes numerous morphological and physiological changes throughout its development and growth. Some physiological parameters are yet to be investigated, limiting the use of the existing in vitro biopharmaceutical tools to predict the in vivo performance of paediatric formulations. Meals and frequencies of their administration evolve during childhood and affect oral drug absorption. Furthermore, the establishment of a paediatric Biopharmaceutics Classification System (pBCS), based on the adult Biopharmaceutics Classification System (BCS), requires criteria adjustments. The usefulness of computational simulation and modeling for extrapolation of adult data to paediatrics has been confirmed as a tool for predicting drug formulation performance. Despite the great number of successful physiologically based pharmacokinetic models to simulate drug disposition, the simulation of drug absorption from the GI tract is a complicating issue in paediatric populations. SUMMARY The biopharmaceutics tools for investigation of oral drug absorption in paediatrics need further development, refinement and validation. A combination of in vitro and in silico methods could compensate for the uncertainties accompanying each method on its own.
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Affiliation(s)
- Mariana Guimarães
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
| | - Marina Statelova
- Department of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - René Holm
- Drug Product Development, Janssen Research and Development, Johnson & Johnson, Beerse, Belgium
| | - Christos Reppas
- Department of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - Moira Symilllides
- Department of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - Maria Vertzoni
- Department of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - Nikoletta Fotaki
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
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43
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O'Shea JP, Holm R, O'Driscoll CM, Griffin BT. Food for thought: formulating away the food effect - a PEARRL review. ACTA ACUST UNITED AC 2018; 71:510-535. [PMID: 29956330 DOI: 10.1111/jphp.12957] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 06/03/2018] [Indexed: 12/14/2022]
Abstract
OBJECTIVES Co-ingestion of oral dosage forms with meals can cause substantial changes in bioavailability relative to the fasted state. Food-mediated effects on bioavailability can have significant consequences in drug development, regulatory and clinical settings. To date, the primary focus of research has focused on the ability to mechanistically understand the causes and predict the occurrence of these effects. KEY FINDINGS The current review describes the mechanisms underpinning the occurrence of food effects, sheds new insights on the relative frequency for newly licensed medicines and describes the various methods by which they can be overcome. Analysis of oral medicines licensed by either the EMA or FDA since 2010 revealed that over 40% display significant food effects. Due to altered bioavailability, these medicines are often required to be dosed, rather restrictively, in either the fed or the fasted state, which can hinder clinical usefulness. SUMMARY There are clinical and commercial advantages to predicting the presence of food effects early in the drug development process, in order to mitigate this risk of variable food effect bioavailability. Formulation approaches aimed at reducing variable food-dependent bioavailability, through the use of bio-enabling formulations, are an essential tool in addressing this challenge and the latest state of the art in this field are summarised here.
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Affiliation(s)
| | - René Holm
- Drug Product Development, Janssen Research and Development, Johnson and Johnson, Beerse, Belgium
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Bauer PV, Duca FA, Waise TMZ, Dranse HJ, Rasmussen BA, Puri A, Rasti M, O'Brien CA, Lam TKT. Lactobacillus gasseri in the Upper Small Intestine Impacts an ACSL3-Dependent Fatty Acid-Sensing Pathway Regulating Whole-Body Glucose Homeostasis. Cell Metab 2018. [PMID: 29514066 DOI: 10.1016/j.cmet.2018.01.013] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Long-chain acyl-CoA synthetase (ACSL)-dependent upper small intestinal lipid metabolism activates pre-absorptive pathways to regulate metabolic homeostasis, but whether changes in the upper small intestinal microbiota alter specific fatty acid-dependent pathways to impact glucose homeostasis remains unknown. We here first find that upper small intestinal infusion of Intralipid, oleic acid, or linoleic acid pre-absorptively increases glucose tolerance and lowers glucose production in rodents. High-fat feeding impairs pre-absorptive fatty acid sensing and reduces upper small intestinal Lactobacillus gasseri levels and ACSL3 expression. Transplantation of healthy upper small intestinal microbiota to high-fat-fed rodents restores L. gasseri levels and fatty acid sensing via increased ACSL3 expression, while L. gasseri probiotic administration to non-transplanted high-fat-fed rodents is sufficient to restore upper small intestinal ACSL3 expression and fatty acid sensing. In summary, we unveil a glucoregulatory role of upper small intestinal L. gasseri that impacts an ACSL3-dependent glucoregulatory fatty acid-sensing pathway.
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Affiliation(s)
- Paige V Bauer
- Toronto General Hospital Research Institute, UHN, MaRS Centre, Toronto Medical Discovery Tower, Room 10-705, 101 College Street, Toronto, ON M5G 1L7, Canada; Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Frank A Duca
- Toronto General Hospital Research Institute, UHN, MaRS Centre, Toronto Medical Discovery Tower, Room 10-705, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - T M Zaved Waise
- Toronto General Hospital Research Institute, UHN, MaRS Centre, Toronto Medical Discovery Tower, Room 10-705, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Helen J Dranse
- Toronto General Hospital Research Institute, UHN, MaRS Centre, Toronto Medical Discovery Tower, Room 10-705, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Brittany A Rasmussen
- Toronto General Hospital Research Institute, UHN, MaRS Centre, Toronto Medical Discovery Tower, Room 10-705, 101 College Street, Toronto, ON M5G 1L7, Canada; Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Akshita Puri
- Princess Margaret Cancer Centre, UHN, Toronto, ON M5G 2M9, Canada
| | - Mozhgan Rasti
- Toronto General Hospital Research Institute, UHN, MaRS Centre, Toronto Medical Discovery Tower, Room 10-705, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Catherine A O'Brien
- Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada; Princess Margaret Cancer Centre, UHN, Toronto, ON M5G 2M9, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Tony K T Lam
- Toronto General Hospital Research Institute, UHN, MaRS Centre, Toronto Medical Discovery Tower, Room 10-705, 101 College Street, Toronto, ON M5G 1L7, Canada; Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada; Department of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada; Banting and Best Diabetes Centre, University of Toronto, Toronto, ON M5G 2C4, Canada.
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45
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Zhou Z, Dunn C, Khadra I, Wilson CG, Halbert GW. Influence of Physiological Gastrointestinal Surfactant Ratio on the Equilibrium Solubility of BCS Class II Drugs Investigated Using a Four Component Mixture Design. Mol Pharm 2017; 14:4132-4144. [PMID: 28749696 PMCID: PMC5717620 DOI: 10.1021/acs.molpharmaceut.7b00354] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Accepted: 07/27/2017] [Indexed: 12/21/2022]
Abstract
The absorption of poorly water-soluble drugs is influenced by the luminal gastrointestinal fluid content and composition, which control solubility. Simulated intestinal fluids have been introduced into dissolution testing including endogenous amphiphiles and digested lipids at physiological levels; however, in vivo individual variation exists in the concentrations of these components, which will alter drug absorption through an effect on solubility. The use of a factorial design of experiment and varying media by introducing different levels of bile, lecithin, and digested lipids has been previously reported, but here we investigate the solubility variation of poorly soluble drugs through more complex biorelevant amphiphile interactions. A four-component mixture design was conducted to understand the solubilization capacity and interactions of bile salt, lecithin, oleate, and monoglyceride with a constant total concentration (11.7 mM) but varying molar ratios. The equilibrium solubility of seven low solubility acidic (zafirlukast), basic (aprepitant, carvedilol), and neutral (fenofibrate, felodipine, griseofulvin, and spironolactone) drugs was investigated. Solubility results are comparable with literature values and also our own previously published design of experiment studies. Results indicate that solubilization is not a sum accumulation of individual amphiphile concentrations, but a drug specific effect through interactions of mixed amphiphile compositions with the drug. This is probably due to a combined interaction of drug characteristics; for example, lipophilicity, molecular shape, and ionization with amphiphile components, which can generate specific drug-micelle affinities. The proportion of each component can have a remarkable influence on solubility with, in some cases, the highest and lowest points close to each other. A single-point solubility measurement in a fixed composition simulated media or human intestinal fluid sample will therefore provide a value without knowledge of the surrounding solubility topography meaning that variability may be overlooked. This study has demonstrated how the amphiphile ratios influence drug solubility and highlights the importance of the envelope of physiological variation when simulating in vivo drug behavior.
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Affiliation(s)
- Zhou Zhou
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Claire Dunn
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Ibrahim Khadra
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Clive G. Wilson
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Gavin W. Halbert
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
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46
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Cummins G, Yung DE, Cox BF, Koulaouzidis A, Desmulliez MPY, Cochran S. Luminally expressed gastrointestinal biomarkers. Expert Rev Gastroenterol Hepatol 2017; 11:1119-1134. [PMID: 28849686 DOI: 10.1080/17474124.2017.1373017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A biomarker is a measurable indicator of normal biologic processes, pathogenic processes or pharmacological responses. The identification of a useful biomarker is challenging, with several hurdles to overcome before clinical adoption. This review gives a general overview of a range of biomarkers associated with inflammatory bowel disease or colorectal cancer along the gastrointestinal tract. Areas covered: These markers include those that are already clinically accepted, such as inflammatory markers such as faecal calprotectin, S100A12 (Calgranulin C), Fatty Acid Binding Proteins (FABP), malignancy markers such as Faecal Occult Blood, Mucins, Stool DNA, Faecal microRNA (miRNA), other markers such as Faecal Elastase, Faecal alpha-1-antitrypsin, Alpha2-macroglobulin and possible future markers such as microbiota, volatile organic compounds and pH. Expert commentary: There are currently a few biomarkers that have been sufficiently validated for routine clinical use at present such as FC. However, many of these biomarkers continue to be limited in sensitivity and specificity for various GI diseases. Emerging biomarkers have the potential to improve diagnosis and monitoring but further study is required to determine efficacy and validate clinical utility.
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Affiliation(s)
- Gerard Cummins
- a Institute of Sensors, Signals and Systems, School of Engineering and Physical Sciences , Heriot-Watt University , Edinburgh , UK
| | - Diana E Yung
- b The Royal Infirmary of Edinburgh , Endoscopy Unit , Edinburgh , UK
| | - Ben F Cox
- c School of Medicine , University of Dundee , Dundee , UK
| | | | - Marc P Y Desmulliez
- a Institute of Sensors, Signals and Systems, School of Engineering and Physical Sciences , Heriot-Watt University , Edinburgh , UK
| | - Sandy Cochran
- d Medical and Industrial Ultrasonics, School of Engineering , University of Glasgow , Glasgow , UK
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47
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Exploring drug solubility in fasted human intestinal fluid aspirates: Impact of inter-individual variability, sampling site and dilution. Int J Pharm 2017; 528:471-484. [DOI: 10.1016/j.ijpharm.2017.05.072] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 05/29/2017] [Accepted: 05/30/2017] [Indexed: 12/06/2022]
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Preclinical Pharmacokinetics and First-in-Human Pharmacokinetics, Safety, and Tolerability of Velpatasvir, a Pangenotypic Hepatitis C Virus NS5A Inhibitor, in Healthy Subjects. Antimicrob Agents Chemother 2017; 61:AAC.02084-16. [PMID: 28193657 DOI: 10.1128/aac.02084-16] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 02/04/2017] [Indexed: 12/13/2022] Open
Abstract
Preclinical characterization of velpatasvir (VEL; GS-5816), an inhibitor of the hepatitis C virus (HCV) NS5A protein, demonstrated that it has favorable in vitro and in vivo properties, including potent antiviral activity against hepatitis C virus genotype 1 to 6 replicons, good metabolic stability, low systemic clearance, and adequate bioavailability and physicochemical properties, to warrant clinical evaluation. The phase 1 (first-in-human) study evaluated the safety, tolerability, and pharmacokinetics of VEL in healthy human subjects following administration of single and multiple (n = 7) once-daily ascending doses and of VEL in the presence and absence of food. Following administration of single and multiple doses, VEL was safe and well tolerated when administered at up to 450 mg and when administered with food. The pharmacokinetic behavior of VEL observed in humans was generally in agreement with that seen during preclinical characterization. Following administration of multiple doses, VEL trough concentrations were significantly greater than the protein-adjusted half-maximal (50%) effective concentration of VEL against HCV genotype 1 to 6 replicons at all evaluated doses greater than 5 mg. The pharmacokinetics of VEL were not significantly affected by administration with food. Collectively, the results of this study support the further clinical investigation of VEL administered once daily as part of a regimen with other pangenotypic direct-acting antivirals for the treatment of HCV infection.
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49
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Prediction of Ketoconazole absorption using an updated in vitro transfer model coupled to physiologically based pharmacokinetic modelling. Eur J Pharm Sci 2017; 100:42-55. [DOI: 10.1016/j.ejps.2016.12.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 12/14/2016] [Accepted: 12/19/2016] [Indexed: 12/29/2022]
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50
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Lu J, Ormes JD, Lowinger M, Mann AKP, Xu W, Patel S, Litster JD, Taylor LS. Compositional effect of complex biorelevant media on the crystallization kinetics of an active pharmaceutical ingredient. CrystEngComm 2017. [DOI: 10.1039/c7ce01128h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bile salts impact crystal nucleation and growth of supersaturated solutions of poorly water soluble drugs.
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Affiliation(s)
- Jennifer Lu
- School of Chemical Engineering
- Purdue University
- Indiana 47907
- USA
| | - James D. Ormes
- Discovery Pharmaceutical Sciences
- MRL, Merck & Co., Inc
- Rahway
- USA
| | | | | | - Wei Xu
- Preformulation
- MRL, Merck & Co., Inc
- West Point
- USA
| | | | - James D. Litster
- School of Chemical Engineering
- Purdue University
- Indiana 47907
- USA
- Department of Chemical and Biological Engineering
| | - Lynne S. Taylor
- Department of Industrial and Physical Pharmacy
- Purdue University
- Indiana 47907
- USA
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