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Peterson B, Jacobsz C, Hamman J, Viljoen A, Steyn D. Pharmacokinetic interactions: The effects of selected herbal extracts on permeation of P-glycoprotein substrate drugs across excised pig intestinal tissue. JOURNAL OF HERBMED PHARMACOLOGY 2021. [DOI: 10.34172/jhp.2022.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Introduction: There is growing concern that co-administered herbal medicines may alter the pharmacokinetics and, therefore, the efficacy and toxicity of Western drugs. The aim of this study was to investigate the potential membrane permeation modulating effects of four herbal extracts, i.e., Harpagophytum procumbens, Hoodia gordonii, Leonotis leonurus, and Vitis vinifera on a model compound, Rhodamine 123 (RH-123). Methods: An in vitro permeation model, i.e., excised pig intestinal tissue, mounted to test chambers in a Sweetana-Grass diffusion apparatus, was used to measure the bi-directional transport of RH-123 in the presence and in the absence of four herbal extracts. The concentration of transported RH-123 in each sample was determined by means of fluorescence spectroscopic analysis. The integrity of the mounted jejunum tissue during experimentation was confirmed by measuring the permeation of Lucifer Yellow through these membranes. Trans-epithelial electrical resistance (TEER) of the mounted membranes was also measured at the onset and termination of each experiment to monitor whether tight junction modulation occurred. Results: H. procumbens extract increased the secretory transport of RH-123, indicative of the induction of P-glycoprotein (P-gp) mediated efflux. H. gordonii extract also increased RH-123’s absorptive transport, coupled with a subsequent decrease in its secretory transport, indicating the P-gp related efflux inhibition. Contrary, L. leonurus extract reduced RH-123’s absorptive transport, accompanied by an increase in its secretory transport. V. vinifera seed extract, however, increased both the absorptive and secretory transport of RH-123. A reduction in TEER was observed in the presence of V. vinifera extract, indicating the modulation of tight junction integrity. Conclusion: The ex vivo pharmacokinetics interactions recorded in the current study suggest that the co-administration of herbal medicines could alter the extent of membrane permeation of Western drugs.
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Affiliation(s)
- Bianca Peterson
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen™), North-West University, Potchefstroom 2520, South Africa
| | - Corneli Jacobsz
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen™), North-West University, Potchefstroom 2520, South Africa
| | - Josias Hamman
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen™), North-West University, Potchefstroom 2520, South Africa
| | - Alvaro Viljoen
- Faculty of Science, Department of Pharmaceutical Sciences and SAMRC Herbal Drugs Research Unit, Tshwane University of Technology, Pretoria, South Africa
| | - Dewald Steyn
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen™), North-West University, Potchefstroom 2520, South Africa
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Permeability of Buccal Mucosa. Pharmaceutics 2021; 13:pharmaceutics13111814. [PMID: 34834229 PMCID: PMC8624797 DOI: 10.3390/pharmaceutics13111814] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/18/2021] [Accepted: 10/23/2021] [Indexed: 11/23/2022] Open
Abstract
The buccal mucosa provides an alternative route of drug delivery that can be more beneficial compared to other administration routes. Although numerous studies and reviews have been published on buccal drug delivery, an extensive review of the permeability data is not available. Understanding the buccal mucosa barrier could provide insights into the approaches to effective drug delivery and optimization of dosage forms. This paper provides a review on the permeability of the buccal mucosa. The intrinsic permeability coefficients of porcine buccal mucosa were collected. Large variability was observed among the published permeability data. The permeability coefficients were then analyzed using a model involving parallel lipoidal and polar transport pathways. For the lipoidal pathway, a correlation was observed between the permeability coefficients and permeant octanol/water partition coefficients (Kow) and molecular weight (MW) in a subset of the permeability data under specific conditions. The permeability analysis suggested that the buccal permeation barrier was less lipophilic than octanol. For the polar pathway and macromolecules, a correlation was observed between the permeability coefficients and permeant MW. The hindered transport analysis suggested an effective pore radius of 1.5 to 3 nm for the buccal membrane barrier.
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Houriet J, Arnold YE, Pellissier L, Kalia YN, Wolfender JL. Using Porcine Jejunum Ex Vivo to Study Absorption and Biotransformation of Natural Products in Plant Extracts: Pueraria lobata as a Case Study. Metabolites 2021; 11:metabo11080541. [PMID: 34436482 PMCID: PMC8398828 DOI: 10.3390/metabo11080541] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 07/30/2021] [Accepted: 08/11/2021] [Indexed: 11/16/2022] Open
Abstract
Herbal preparations (HPs) used in folk medicine are complex mixtures of natural products (NPs). Their efficacy in vivo after ingestion depends on the uptake of the active ingredient, and, in some cases, their metabolites, in the gastrointestinal tract. Thus, correlating bioactivities measured in vitro and efficacy in vivo is a challenge. An extract of Pueraria lobata rich in different types of isoflavones was used to evaluate the capacity of viable porcine small intestine ex vivo to elucidate the absorption of HP constituents, and, in some cases, their metabolites. The identification and transport of permeants across the jejunum was monitored by liquid chromatography-mass spectrometry (LC-MS), combining targeted and untargeted metabolite profiling approaches. It was observed that the C-glycoside isoflavones were stable and crossed the intestinal membrane, while various O-glycoside isoflavones were metabolized into their corresponding aglycones, which were then absorbed. These results are consistent with human data, highlighting the potential of using this approach. A thorough investigation of the impact of absorption and biotransformation was obtained without in vivo studies. The combination of qualitative untargeted and quantitative targeted LC-MS methods effectively monitored a large number of NPs and their metabolites, which is essential for research on HPs.
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Affiliation(s)
- Joëlle Houriet
- School of Pharmaceutical Sciences, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva, Switzerland; (J.H.); (Y.E.A.); (L.P.); (Y.N.K.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva, Switzerland
| | - Yvonne E. Arnold
- School of Pharmaceutical Sciences, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva, Switzerland; (J.H.); (Y.E.A.); (L.P.); (Y.N.K.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva, Switzerland
| | - Léonie Pellissier
- School of Pharmaceutical Sciences, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva, Switzerland; (J.H.); (Y.E.A.); (L.P.); (Y.N.K.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva, Switzerland
| | - Yogeshvar N. Kalia
- School of Pharmaceutical Sciences, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva, Switzerland; (J.H.); (Y.E.A.); (L.P.); (Y.N.K.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva, Switzerland
| | - Jean-Luc Wolfender
- School of Pharmaceutical Sciences, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva, Switzerland; (J.H.); (Y.E.A.); (L.P.); (Y.N.K.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva, Switzerland
- Correspondence:
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Pinto S, Pintado ME, Sarmento B. In vivo, ex vivo and in vitro assessment of buccal permeation of drugs from delivery systems. Expert Opin Drug Deliv 2019; 17:33-48. [PMID: 31786958 DOI: 10.1080/17425247.2020.1699913] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Introduction: Buccal mucosa has been described as an attractive site for local and systemic drug delivery, owing its accessibility, safety, and excellent blood supply. The absorption of drugs through buccal mucosa has been assessed by in vivo, ex vivo and in vitro permeability studies, using animal and cell-based models with close resemblance to the human buccal mucosa.Areas covered: This paper focuses on the current in vivo, ex vivo and in vitro permeability studies to analyze the absorption of compounds of interest through buccal mucosa, as well as their advantages and limitations in the preclinical studies of the drugs absorption profiles. The techniques for preparation and preservation of the animal buccal tissue are also discussed to evaluate their interference in the integrity and permeability of the tissues.Expert opinion: Overall, the permeability studies have been useful to evaluate the drugs absorption and to clarify the mechanism of transport of drugs across human buccal mucosa, as well as to explain the enhancement of permeability provided by certain dosage forms. Currently, several researchers have demonstrated particular interest in ex vivo permeability studies, due to their effectiveness in the evaluation of drug absorption and low costs in the acquisition of buccal mucosa samples.
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Affiliation(s)
- Soraia Pinto
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,INEB - Instituto Nacional de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
| | - Manuela E Pintado
- Escola Superior de Biotecnologia, Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Porto, Portugal
| | - Bruno Sarmento
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,INEB - Instituto Nacional de Engenharia Biomédica, Universidade do Porto, Porto, Portugal.,Instituto Universitário de Ciências da Saúde, CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Gandra, Portugal
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Molecular matchmaking between the popular weight-loss herb Hoodia gordonii and GPR119, a potential drug target for metabolic disorder. Proc Natl Acad Sci U S A 2014; 111:14571-6. [PMID: 25246581 DOI: 10.1073/pnas.1324130111] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
African cactiform Hoodia gordonii (Asclepiadaceae) has been used for thousands of years by Xhomani Bushmen as an anorexant during hunting trips and has been proposed as a new agent for the management of body weight. However, its in vivo targets and molecular mechanisms remain elusive. GPR119, a G protein-coupled receptor highly expressed in pancreatic β cells and intestinal L cells, has been demonstrated to facilitate glucose-stimulated insulin secretion (GSIS) and represents a novel and attractive target for the therapy of metabolic disorders. Here, we disclose that Gordonoside F (a steroid glycoside isolated from H. gordonii), but not the widely known P57, activates specifically GPR119. Successful synthesis of Gordonoside F facilitates further characterization of this compound. Gordonoside F promotes GSIS both in vitro and in vivo and reduces food intake in mice. These effects are mediated by GPR119 because GPR119 knockout prevents the therapeutic effects of Gordonoside F. Interestingly, the appetite-suppressing effect of Hoodia extract was also partially blocked by GPR119 knockout. Our results demonstrate for the first time, to our knowledge, that GPR119 is a direct target and one of the major mechanisms underlying the therapeutic effect of the popular "weight loss" herb H. gordonii. Given the long history of safe application of this herb in weight control, it is foreseeable that the novel scaffold of Gordonoside F provides a promising opportunity to develop new drugs in treating metabolic diseases.
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Smith C, Krygsman A. Hoodia gordonii: to eat, or not to eat. JOURNAL OF ETHNOPHARMACOLOGY 2014; 155:987-991. [PMID: 24955559 DOI: 10.1016/j.jep.2014.06.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 06/03/2014] [Accepted: 06/14/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Hoodia gordonii (family Apocynaceae) has become known globally for its claimed effect of appetite suppression. Despite a relatively large body of evidence of the plant׳s chemical make-up, peer-reviewed studies to provide scientific information on physiological effects of Hoodia gordonii are relatively sparse. The role of the pregnane glycoside P57-commonly accepted to be responsible for appetite suppression-has been questioned recently. Furthermore, a variety of physiological side-effects associated with consumption of the plant in extracted form questions its suitability for consumption. Although adverse effects have been described before, the relative abundance of non-peer-reviewed data originating from patent documents and lay publication for advertising, which specifically only focus on beneficial outcomes, skews the view of the risk-benefit-balance. Here we provide a review of peer-reviewed studies on the plant׳s physiological effects. Novel data from an in vivo rodent study further elucidate the benefit-to-risk ratio associated with consumption. CONCLUSIONS we conclude that although Hoodia gordonii seems to have a desired effect on appetite and weight loss, this effect may at least in part be a secondary symptom of the serious adverse effects that are associated with consumption of the high doses required to achieve therapeutic clinical effect.
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Affiliation(s)
- Carine Smith
- Department Physiological Sciences, Stellenbosch University, Stellenbosch, Private Bag X1, Matieland 7602, South Africa.
| | - Annadie Krygsman
- Department Physiological Sciences, Stellenbosch University, Stellenbosch, Private Bag X1, Matieland 7602, South Africa
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