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Choi EH, Lee SB, Lee DY, Kim GT, Shim SM, Park TS. Increased Intestinal Absorption of Vitamin U in Steamed Graviola Leaf Extract Activates Nicotine Detoxification. Nutrients 2019; 11:E1334. [PMID: 31207874 PMCID: PMC6627529 DOI: 10.3390/nu11061334] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/11/2019] [Accepted: 06/12/2019] [Indexed: 01/02/2023] Open
Abstract
Graviola leaves contain much vitamin U (vit U), but their sensory quality is not good enough for them to be developed as food ingredients. Addition of excipient natural ingredients formulated alongside vit U as active ingredients could enhance not only its sensory quality but also its bioavailability. The objectives of this study were to measure the bioaccessibility and intestinal cellular uptake of bioactive components, including rutin, kaempferol-rutinoside, and vit U, from steamed extract of graviola leaves (SGV) and SGV enriched with kale extract (SGK), and to examine how much they can detoxify nicotine in HepG2 cells. The bioaccessibility of vit U from SGV and SGK was 82.40% and 68.03%, respectively. The cellular uptake of vit U in SGK by Caco-2 cells was higher than that in SGV. Cotinine content converted from nicotine in HepG2 cells for 120 min was 0.22 and 0.25 μg/mg protein in 50 μg/mL of SGV and SGK, respectively, which were 2.86 and 3.57 times higher than the no-treatment control. SGK treatment of HepG2 cells upregulated CYP2A6 three times as much as did that of SGV. Our results suggest that graviola leaf extract enriched with excipient ingredients such as kale could improve vit U absorption and provide a natural therapy for detoxifying nicotine.
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Affiliation(s)
- Eun-Hye Choi
- Department of Food Science and Technology, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 05006, Korea.
| | - Seon-Bong Lee
- Department of Food Science and Technology, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 05006, Korea.
| | - Da-Yeon Lee
- Department of Food Science and Technology, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 05006, Korea.
| | - Goon-Tae Kim
- Department of Life Science, Gachon University, Bokjung-dong, Sujung-gu, Sungnam, Gyeonggi-do, Seongnam 13120, Korea.
| | - Soon-Mi Shim
- Department of Food Science and Technology, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 05006, Korea.
| | - Tae-Sik Park
- Department of Life Science, Gachon University, Bokjung-dong, Sujung-gu, Sungnam, Gyeonggi-do, Seongnam 13120, Korea.
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52
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Zhang B, Lu Y, Li P, Wen X, Yang J. Study on the absorption of corosolic acid in the gastrointestinal tract and its metabolites in rats. Toxicol Appl Pharmacol 2019; 378:114600. [PMID: 31150656 DOI: 10.1016/j.taap.2019.114600] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 05/24/2019] [Accepted: 05/27/2019] [Indexed: 11/19/2022]
Abstract
Corosolic acid (CRA) has been widely used as a food supplement. However, its pharmacokinetic behavior still needs to be explored. In this study, the absorption of CRA in stomach and intestine were investigated by in situ gastric absorption and in situ single-pass perfusion, respectively. Furthermore, the metabolites of CRA in rat plasma, bile, and urine were identified by UPLC-QTOF-MS. The enzymes responsible for its metabolism were explored by rat liver microsome (RLMs). The effects of plasma containing metabolites on cancer cell growth and glucose consumption were evaluated by HT29 and HepG2 cells receptively. The results showed that CRA absorption rate is approximately 20% to 40% in stomach. It has similar absorption rate constant (Ka) in duodenum/jejunum/ileum/colon. However, its effective permeability (Peff) in ileum at 9 μg/mL is significantly higher than the Peff in colon. Moreover, five possible metabolites were identified in plasma and bile, suggesting CRA could be metabolized through methyl carboxylation, hydroxylation, methyl aldehyde substitution, glucuronidation, and acetylation in vivo. Meanwhile, CYP1A2 and CYP3A4 were found to participate in its metabolism. The plasma containing metabolites of CRA significantly inhibited the growth of HT29 colon cancer cells and stimulated glucose consumption of HepG2 cells. Taken together, these results demonstrated that CRA has good absorption in both stomach and small intestine, but it could be metabolized partly due to CYP1A2 and CYP3A4 in vivo. Its metabolites might be responsible for the excellent anti-cancer and anti-diabetes activities of CRA. This study will provide evidence for further CRA development.
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Affiliation(s)
- Biying Zhang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 211198, China.
| | - Yawen Lu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 211198, China.
| | - Ping Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 211198, China
| | - Xiaodong Wen
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 211198, China.
| | - Jie Yang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 211198, China.
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53
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Hebenstreit D, Pichler R, Heidegger I. Drug-Drug Interactions in Prostate Cancer Treatment. Clin Genitourin Cancer 2019; 18:e71-e82. [PMID: 31677899 DOI: 10.1016/j.clgc.2019.05.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/16/2019] [Accepted: 05/20/2019] [Indexed: 12/24/2022]
Abstract
Polypharmacy is associated with an increased risk of drug-drug interactions (DDIs), which can cause serious and debilitating drug-induced adverse events. With a steadily aging population and associated increasing multimorbidity and polypharmacy, the potential for DDIs becomes considerably important. Prostate cancer (PCa) is the most common cancer in men and occurs mostly in elderly men in the Western world. Therefore, the aim of this review is to give an overview of DDIs in PCa therapy to better understand pharmacodynamic and pharm kinetic side effects as well as their interactions with other medications. Last, we explore potential future strategies, which might help to optimize treatment and reduce adverse events patients with polypharmacy and PCa.
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Affiliation(s)
- Doris Hebenstreit
- Department of Urology, Medical University Innsbruck, Innsbruck, Austria
| | - Renate Pichler
- Department of Urology, Medical University Innsbruck, Innsbruck, Austria
| | - Isabel Heidegger
- Department of Urology, Medical University Innsbruck, Innsbruck, Austria.
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54
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Abstract
Oral administration of a solid dosage form requires drug dissolution in the gastrointestinal tract before absorption. Solubility is a key factor controlling dissolution, and it is recognized that, within the intestinal tract, this is influenced by the luminal fluid pH, amphiphile content, and composition. Various simulated intestinal fluid recipes have been introduced to mimic this behavior and studied using a range of different experimental techniques. In this article, we have measured equilibrium solubility utilizing a novel four component mixture design (4CMD) with biorelevant amphiphiles (bile salt, phospholipid, oleate, and monoglyceride) within a matrix of three pH values (5, 6, and 7) and total amphiphile concentrations (11.7, 30.6, and 77.5 mM) to provide a topographical and statistical overview. Three poorly soluble drugs representing acidic (indomethacin), basic (carvedilol), and neutral (fenofibrate) categories have been studied. The macroscopic solubility behavior agrees with literature and exhibits an overall increasing solubility from low pH and total amphiphile concentration to high pH and total amphiphile concentration. Within the matrix, all three drugs display different topographies, which can be related to the statistical effect levels of the individual amphiphiles or amphiphile interactions on solubility. The study also identifies previously unreported three and four way factor interactions notably between bile salt, phospholipid, pH, and total amphiphile concentration. In addition, the results also reveal that solubility variability is linked to the number of amphiphiles and the respective ratios in the measurement fluid, with the minimum variation present in systems containing all four amphiphiles. The individual 4CMD experiments within the matrix can be linked to provide a possible intestinal solubility window for each drug that could be applied in PBPK modeling systems. Overall the approach provides a novel overview of intestinal solubility topography along with greater detail on the impact of the various factors studied; however, each matrix requires 351 individual solubility measurements. Further studies will be required to refine the experimental protocol in order the maximize information garnered while minimizing the number of measurements required.
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Affiliation(s)
- Claire Dunn
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Jeremy Perrier
- 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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Subramaniam M, Enns CB, Loewen ME. Sigmoidal kinetics define porcine intestinal segregation of electrogenic monosaccharide transport systems as having multiple transporter population involvement. Physiol Rep 2019; 7:e14090. [PMID: 31062524 PMCID: PMC6503033 DOI: 10.14814/phy2.14090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 04/09/2019] [Accepted: 04/10/2019] [Indexed: 01/22/2023] Open
Abstract
Kinetic characterization of electrogenic sodium-dependent transport in Ussing chambers of d-glucose and d-galactose demonstrated sigmoidal/Hill kinetics in the porcine jejunum and ileum, with the absence of transport in the distal colon. In the jejunum, a high-affinity, super-low-capacity (Ha/sLc) kinetic system accounted for glucose transport, and a low-affinity, low-capacity (La/Lc) kinetic system accounted for galactose transport. In contrast, the ileum demonstrated a high-affinity, super-high-capacity (Ha/sHc) glucose transport and a low-affinity, high-capacity (La/Hc) galactose transport systems. Jejunal glucose transport was not inhibited by dapagliflozin, but galactose transport was inhibited. Comparatively, ileal glucose and galactose transport were both sensitive to dapagliflozin. Genomic and gene expression analyses identified 10 of the 12 known SLC5A family members in the porcine jejunum, ileum, and distal colon. Dominant SGLT1 (SLC5A1) and SGLT3 (SLC5A4) expression was associated with the sigmoidal Ha/sLc glucose and La/Lc galactose transport systems in the jejunum. Comparatively, the dominant expression of SGLT1 (SLC5A1) in the ileum was only associated with Ha glucose and La galactose kinetic systems. However, the sigmoidal kinetics and overall high capacity (Hc) of transport is unlikely accounted for by SGLT1 (SLC5A1) alone. Finally, the absence of transport and lack of pharmacological inhibition in the colon was associated with the poor expression of SLC5A genes. Altogether, the results demonstrated intestinal segregation of monosaccharide transport fit different sigmoidal kinetic systems. This reveals multiple transporter populations in each system, supported by gene expression profiles and pharmacological inhibition. Overall, this work demonstrates a complexity to transporter involvement in intestinal electrogenic monosaccharide absorption systems not previously defined.
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Affiliation(s)
- Marina Subramaniam
- Department of Veterinary Biomedical SciencesWestern College of Veterinary MedicineUniversity of SaskatchewanSaskatoonSaskatchewanCanada
| | - Cole B. Enns
- Department of Veterinary Biomedical SciencesWestern College of Veterinary MedicineUniversity of SaskatchewanSaskatoonSaskatchewanCanada
| | - Matthew E. Loewen
- Department of Veterinary Biomedical SciencesWestern College of Veterinary MedicineUniversity of SaskatchewanSaskatoonSaskatchewanCanada
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Palaniappan B, Manoharan P, Arthur S, Singh S, Murughiyan U, Sundaram U. Stimulation of constitutive nitric oxide uniquely and compensatorily regulates intestinal epithelial cell brush border membrane Na absorption. Physiol Rep 2019; 7:e14086. [PMID: 31074207 PMCID: PMC6509550 DOI: 10.14814/phy2.14086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 04/10/2019] [Accepted: 04/12/2019] [Indexed: 02/04/2023] Open
Abstract
In the mammalian small intestine, sodium is primarily absorbed by Na+ /H+ exchange (NHE3) and Na-glucose cotransport (SGLT1) in the brush border membrane (BBM) of villus cells. However, how enhanced cellular constitutive nitric oxide (cNO) may affect NHE3 and SGLT1 remains unclear. Both in vivo in rabbit intestinal villus cells and in vitro IEC-18 cells, administration of NO donor, GSNAP, modestly increased cNO. GSNAP stimulated SGLT1 in villus and IEC-18 cells. The mechanism of stimulation was secondary to an increase in the affinity of SGLT1 for glucose. The change in SGLT1 was not secondary to altered Na-extruding capacity of the cell since Na+ /K+ -ATPase was decreased by GSNAP treatment. In contrast, GSNAP inhibited NHE3 activity in villus cell BBM. The mechanism of NHE3 inhibition was secondary to reduced BBM transporter numbers. These studies demonstrated that the physiological increase in cNO uniquely regulates mammalian small intestinal NHE3 and SGLT1 to maintain Na homeostasis.
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Affiliation(s)
- Balasubramanian Palaniappan
- Department of Clinical and Translational SciencesJoan C Edwards School of MedicineMarshall UniversityHuntingtonWest Virginia
| | - Palanikumar Manoharan
- Department of Clinical and Translational SciencesJoan C Edwards School of MedicineMarshall UniversityHuntingtonWest Virginia
| | - Subha Arthur
- Department of Clinical and Translational SciencesJoan C Edwards School of MedicineMarshall UniversityHuntingtonWest Virginia
| | - Soudamani Singh
- Department of Clinical and Translational SciencesJoan C Edwards School of MedicineMarshall UniversityHuntingtonWest Virginia
| | - Usha Murughiyan
- Department of Clinical and Translational SciencesJoan C Edwards School of MedicineMarshall UniversityHuntingtonWest Virginia
| | - Uma Sundaram
- Department of Clinical and Translational SciencesJoan C Edwards School of MedicineMarshall UniversityHuntingtonWest Virginia
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Abstract
A growing literature is dedicated to the understanding of carotenoid beneficial health effects. However, the absorption process of this broad family of molecules is still poorly understood. These highly lipophilic plant metabolites are usually weakly absorbed. It was long believed that β-carotene absorption (the principal provitamin A carotenoid in the human diet), and thus all other carotenoid absorption, was driven by passive diffusion through the brush border of the enterocytes. The identification of transporters able to facilitate carotenoid uptake by the enterocytes has challenged established statements. After a brief overview of carotenoid metabolism in the human upper gastrointestinal tract, a focus will be put on the identified proteins participating in the transport and the metabolism of carotenoids in intestinal cells and the regulation of these processes. Further progress in the understanding of the molecular mechanisms regulating carotenoid intestinal absorption is still required to optimize their bioavailability and, thus, their health effects.
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Affiliation(s)
- Emmanuelle Reboul
- Aix-Marseille University, INRA, INSERM, C2VN, 13005 Marseille, France.
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58
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Kapoian T, Khalil S, O'Mara NB, Brink DM, Daugirdas JT. Modeled Daily Ingested, Absorbed and Bound Phosphorus: New Measures of Mineral Balance in Hemodialysis Patients. Am J Nephrol 2019; 49:368-376. [PMID: 30939469 DOI: 10.1159/000499438] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 03/01/2019] [Indexed: 11/19/2022]
Abstract
BACKGROUND Control of predialysis serum phosphorus in hemodialysis patients is challenging. We explored the utility of a novel kinetic phosphorus modeling program. METHODS As part of a quality assurance program, urea kinetic modeling results were combined with those from phosphorus kinetic modeling to compute modeled daily ingested phosphorus (DIP) and components making up this metric, including absorbed, bound, and nonabsorbed, nonbound phosphorus. RESULTS In 182 hemodialysis patients, DIP averaged 1,089 ± 348 mg/day in men and 934 ± 292 in women (p < 0.002) and correlated substantially with body weight. DIP/kg bodyweight (12.8 ± 3.40 mg/kg) was not significantly different between the sexes. Prescribed equivalent binder dose (EBD) was 4.98 ± 3.61 and 4.53 ± 3.02 g/day in men and women, respectively (p NS). Protein catabolic rate (PCR) was significantly higher in men (64.4 ± 18) g/day vs. women (48.2 ± 15.6, p < 0.001), and the DIP/PCR ratio was 17.4 ± 4.81 in men vs. 20.1 ± 5.76 in women (p < 0.001). Presence of residual kidney function was associated with a lower prescribed EBD dose (4.08 ± 2.62 vs. 5.38 ± 3.81 g/day, p < 0.01). Self-reported poor binder compliance was associated with higher DIP or DIP/kg as well as higher prescribed EBD. In anuric patients, DIP/kg was increased in patients consuming diets with high phosphate additive content and those reporting poor compliance with the prescribed dose of phosphate binders. CONCLUSIONS The combination of urea kinetic and phosphorus modeling can be used to estimate measures related to phosphorus intake. High DIP/PCR or DIP/kg body weight values in anuric patients suggest consumption of a diet high in phosphorus additives or noncompliance with the prescribed amount of phosphorus binders.
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Affiliation(s)
- Toros Kapoian
- Rutgers, Robert Wood Johnson Medical School, Dialysis Clinic, Inc., North Brunswick, New Jersey, USA
| | - Steven Khalil
- Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA
| | | | - Diane M Brink
- Dialysis Clinic, Inc., North Brunswick, New Jersey, USA
| | - John T Daugirdas
- Department of Medicine, University of Illinois College of Medicine, Chicago, Illinois, USA,
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59
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Meoli L, Ben-Zvi D, Panciotti C, Kvas S, Pizarro P, Munoz R, Stylopoulos N. Intestine-Specific Overexpression of LDLR Enhances Cholesterol Excretion and Induces Metabolic Changes in Male Mice. Endocrinology 2019; 160:744-758. [PMID: 30566603 PMCID: PMC6399722 DOI: 10.1210/en.2018-00098] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 12/13/2018] [Indexed: 12/13/2022]
Abstract
Roux-en-Y gastric bypass (RYGB) surgery is one of the most effective treatment options for severe obesity and related comorbidities, including hyperlipidemia, a well-established risk factor of cardiovascular diseases. Elucidating the molecular mechanisms underlying the beneficial effects of RYGB may facilitate development of equally effective, but less invasive, treatments. Recent studies have revealed that RYGB increases low-density lipoprotein receptor (LDLR) expression in the intestine of rodents. Therefore, in this study we first examined the effects of RYGB on intestinal cholesterol metabolism in human patients, and we show that they also exhibit profound changes and increased LDLR expression. We then hypothesized that the upregulation of intestinal LDLR may be sufficient to decrease circulating cholesterol levels. To this end, we generated and studied mice that overexpress human LDLR specifically in the intestine. This perturbation significantly affected intestinal metabolism, augmented fecal cholesterol excretion, and induced a reciprocal suppression of the machinery related to luminal cholesterol absorption and bile acid synthesis. Circulating cholesterol levels were significantly decreased and, remarkably, several other metabolic effects were similar to those observed in RYGB-treated rodents and patients, including improved glucose metabolism. These data highlight the importance of intestinal cholesterol metabolism for the beneficial metabolic effects of RYGB and for the treatment of hyperlipidemia.
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Affiliation(s)
- Luca Meoli
- Center for Basic and Translational Obesity Research, Boston Children’s Hospital, Boston, Massachusetts
- Division of Endocrinology, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Danny Ben-Zvi
- Center for Basic and Translational Obesity Research, Boston Children’s Hospital, Boston, Massachusetts
- Division of Endocrinology, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts
- Department of Developmental Biology and Cancer Research, Institute for Medical Research Israel–Canada, Hebrew University–Hadassah Medical School, Jerusalem, Israel
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, Massachusetts
| | - Courtney Panciotti
- Center for Basic and Translational Obesity Research, Boston Children’s Hospital, Boston, Massachusetts
- Division of Endocrinology, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Stephanie Kvas
- Center for Basic and Translational Obesity Research, Boston Children’s Hospital, Boston, Massachusetts
- Division of Endocrinology, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Palmenia Pizarro
- Department of Digestive Surgery, School of Medicine, Pontificia Universidad Católica, Santiago, Chile
| | - Rodrigo Munoz
- Department of Digestive Surgery, School of Medicine, Pontificia Universidad Católica, Santiago, Chile
| | - Nicholas Stylopoulos
- Center for Basic and Translational Obesity Research, Boston Children’s Hospital, Boston, Massachusetts
- Division of Endocrinology, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts
- Correspondence: Nicholas Stylopoulos, MD, Division of Endocrinology, CLS16066, Boston Children’s Hospital, 300 Longwood Avenue, Boston, Massachusetts 02115.
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Stephens CE, Whittamore JM, Hatch M. 125 Iodide as a surrogate tracer for epithelial chloride transport by the mouse large intestine in vitro. Exp Physiol 2019; 104:334-344. [PMID: 30615234 PMCID: PMC6397055 DOI: 10.1113/ep087445] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 01/02/2019] [Indexed: 12/25/2022]
Abstract
NEW FINDINGS What is the central question of this study? The tracer 36 Cl- , currently used to measure transepithelial Cl- fluxes, has become prohibitively expensive, threatening its future use. 125 Iodide, previously validated alongside 36 Cl- as a tracer of Cl- efflux by cells, has not been tested as a surrogate for 36 Cl- across epithelia. What is the main finding and its importance? We demonstrate that 125 I- can serve as an inexpensive replacement for measuring Cl- transport across mouse large intestine, tracking Cl- transport in response to cAMP stimulation (inducing Cl- secretion) in the presence and absence of the main gastrointestinal Cl- -HCO3- exchanger, DRA. ABSTRACT Chloride transport is important for driving fluid secretion and absorption by the large intestine, with dysregulation resulting in diarrhoea-associated pathologies. The radioisotope 36 Cl- has long been used as a tracer to measure epithelial Cl- transport but is prohibitively expensive. 125 Iodide has been used as an alternative to 36 Cl- in some transport assays but has never been validated as an alternative for tracing bidirectional transepithelial Cl- fluxes. The goal of this study was to validate 125 I- as an alternative to 36 Cl- for measurement of Cl- transport by the intestine. Simultaneous fluxes of 36 Cl- and 125 I- were measured across the mouse caecum and distal colon. Net Cl- secretion was induced by the stimulation of cAMP with a cocktail of forskolin (FSK) and 3-isobutyl-1-methylxanthine (IBMX). Unidirectional fluxes of 125 I- correlated well with 36 Cl- fluxes after cAMP-induced net Cl- secretion, occurring predominantly through a reduction in the absorptive mucosal-to-serosal Cl- flux rather than by stimulation of the secretory serosal-to-mucosal Cl- flux. Correlations between 125 I- fluxes and 36 Cl- fluxes were maintained in epithelia from mice lacking DRA (Slc26a3), the main Cl- -HCO3- exchanger responsible for Cl- absorption by the large intestine. Lower rates of Cl- and I- absorption in the DRA knockout intestine suggest that DRA might have a previously unrecognized role in iodide uptake. This study validates that 125 I- traces transepithelial Cl- fluxes across the mouse large intestine, provides insights into the mechanism of net Cl- secretion and suggests that DRA might be involved in intestinal iodide absorption.
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Affiliation(s)
- Christine E Stephens
- Department of Pathology, Immunology, and Laboratory Medicine, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Jonathan M Whittamore
- Department of Pathology, Immunology, and Laboratory Medicine, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Marguerite Hatch
- Department of Pathology, Immunology, and Laboratory Medicine, College of Medicine, University of Florida, Gainesville, FL, USA
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61
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Xiong Y, Zou Y, Chen L, Xu Y, Wang S. Development and In Vivo Evaluation of Ziyuglycoside I-Loaded Self-Microemulsifying Formulation for Activity of Increasing Leukocyte. AAPS PharmSciTech 2019; 20:101. [PMID: 30721444 PMCID: PMC6373417 DOI: 10.1208/s12249-019-1313-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 01/14/2019] [Indexed: 01/30/2023] Open
Abstract
Ziyuglycoside I (ZgI), a major effective ingredient of Sanguisorba officinalis L, has shown good activity in increasing leukocyte of myelosuppression mice. However, oral ZgI therapy has been deterred by poor bioavailability because of its low aqueous solubility and permeability. Our study was to develop ZgI-loaded self-microemulsifying drug delivery system (SMEDDS) and evaluate its intestinal absorption, and pharmacokinetic and pharmacodynamic activity for increasing leukocyte. The formulation was designed and optimized by measuring the equilibrium solubility of ZgI in different vehicles and the pseudoternary phase diagram. Further, morphology, particle size, stability, in vitro release, in situ single-pass intestinal perfusion (SPIP), in vivo activity, and in vivo pharmacokinetic (PK) of ZgI-SMEDDS were charactered or studied. Optimized formulations for in vitro dissolution were Obleique CC497, Tween-20, and Transcutol HP with a proportion of 0.25/0.45/0.30 via D-optimal mixture design. Results showed that the solubility of ZgI was enhanced up to 23.93 mg/g and its average particle size was 207.92 ± 2.13 nm. The release of ZgI had been greatly improved by the SMEDDS. In SPIP, the intestinal absorption of SMEDDS was much better than plain ZgI. In PK, we found the oral bioavailability of ZgI-SMEDDS was 6.94-fold higher absolute bioavailability (21.94 ± 4.67) % than ZgI (3.16 ± 0.89) %. The most important was that the mice WBC of ZgI-SMEDDS group was significantly higher than that of the ZgI group. Our study suggested that SMEDDS could increase the solubility of ZgI, which was beneficial to improve oral bioavailability and enhance biological activity.
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Affiliation(s)
- Yongai Xiong
- School of Pharmacy, Zunyi Medical University, West No. 6 Xuefu Road, Xinpu District, Zunyi, 563000 Guizhou People’s Republic of China
| | - Ya Zou
- School of Pharmacy, Zunyi Medical University, West No. 6 Xuefu Road, Xinpu District, Zunyi, 563000 Guizhou People’s Republic of China
| | - Li Chen
- School of Pharmacy, Zunyi Medical University, West No. 6 Xuefu Road, Xinpu District, Zunyi, 563000 Guizhou People’s Republic of China
| | - Yingshu Xu
- School of Pharmacy, Zunyi Medical University, West No. 6 Xuefu Road, Xinpu District, Zunyi, 563000 Guizhou People’s Republic of China
| | - Sen Wang
- School of Pharmacy, Zunyi Medical University, West No. 6 Xuefu Road, Xinpu District, Zunyi, 563000 Guizhou People’s Republic of China
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Nakano T, Inoue I, Murakoshi T. A Newly Integrated Model for Intestinal Cholesterol Absorption and Efflux Reappraises How Plant Sterol Intake Reduces Circulating Cholesterol Levels. Nutrients 2019; 11:nu11020310. [PMID: 30717222 PMCID: PMC6412963 DOI: 10.3390/nu11020310] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 01/28/2019] [Accepted: 01/29/2019] [Indexed: 12/27/2022] Open
Abstract
Cholesterol homeostasis is maintained through a balance of de novo synthesis, intestinal absorption, and excretion from the gut. The small intestine contributes to cholesterol homeostasis by absorbing and excreting it, the latter of which is referred to as trans-intestinal cholesterol efflux (TICE). Because the excretion efficiency of endogenous cholesterol is inversely associated with the development of atherosclerosis, TICE provides an attractive therapeutic target. Thus, elucidation of the mechanism is warranted. We have shown that intestinal cholesterol absorption and TICE are inversely correlated in intestinal perfusion experiments in mice. In this review, we summarized 28 paired data sets for absorption efficiency and fecal neutral sterol excretion, a surrogate marker of TICE, obtained from 13 available publications in a figure, demonstrating the inverse correlation were nearly consistent with the assumption. We then offer a bidirectional flux model that accommodates absorption and TICE occurring in the same segment. In this model, the brush border membrane (BBM) of intestinal epithelial cells stands as the dividing ridge for cholesterol fluxes, making the opposite fluxes competitive and being coordinated by shared BBM-localized transporters, ATP-binding cassette G5/G8 and Niemann-Pick C1-like 1. Furthermore, the idea is applied to address how excess plant sterol/stanol (PS) intake reduces circulating cholesterol level, because the mechanism is still unclear. We propose that unabsorbable PS repeatedly shuttles between the BBM and lumen and promotes concomitant cholesterol efflux. Additionally, PSs, which are chemically analogous to cholesterol, may disturb the trafficking machineries that transport cholesterol to the cell interior.
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Affiliation(s)
- Takanari Nakano
- Department of Biochemistry, Faculty of Medicine, Saitama Medical University, Saitama 350-0495, Japan.
| | - Ikuo Inoue
- Department of Diabetes and Endocrinology, Faculty of Medicine, Saitama Medical University, Saitama 350-0495, Japan.
| | - Takayuki Murakoshi
- Department of Biochemistry, Faculty of Medicine, Saitama Medical University, Saitama 350-0495, Japan.
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Kubbinga M, Augustijns P, García MA, Heinen C, Wortelboer HM, Verwei M, Langguth P. The effect of chitosan on the bioaccessibility and intestinal permeability of acyclovir. Eur J Pharm Biopharm 2019; 136:147-155. [PMID: 30682491 DOI: 10.1016/j.ejpb.2019.01.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 01/09/2019] [Accepted: 01/21/2019] [Indexed: 11/18/2022]
Abstract
Chitosan is object of pharmaceutical research as a candidate permeability enhancer. However, chitosan was recently shown to reduce the oral bioavailability of acyclovir in humans. The effect of chitosan on two processes determining the oral bioavailability of acyclovir, bioaccessibility and intestinal absorption, was now investigated. Acyclovir's bioaccessibility was studied using the dynamic TNO gastro-Intestinal Model (TIM-1). Four epithelial models were used for permeability experiments: a Caco-2 cell model in absence and presence of mucus and both rat and porcine excised intestinal segments. Study concentrations of acyclovir (0.8 g/l) and chitosan (1.6 g/l and 4 g/l) were in line with those used in the aforementioned human study. No effect of chitosan was measured on the bioaccessibility of acyclovir in the TIM-1 system. The results obtained with the Caco-2 models were not in line with the in vivo data. The tissue segment models (rat and porcine intestine) showed a negative trend of acyclovir's permeation in presence of chitosan. The Ussing type chamber showed to be the most biopredictive, as it did point to an overall statistically significantly reduced absorption of acyclovir. This model thus seems most appropriate for pharmaceutical development purposes, in particular when interactions between excipients and drugs are to become addressed.
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Affiliation(s)
- Marlies Kubbinga
- National Institute for Public Health and the Environment, Bilthoven, the Netherlands; Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Mainz, Germany; Medicines Evaluation Board, Utrecht, the Netherlands
| | - Patrick Augustijns
- Drug Delivery and Disposition, KU Leuven, Department of Pharmaceutical and Pharmacological Sciences, Belgium
| | - Mauricio A García
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Mainz, Germany
| | - Christian Heinen
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Mainz, Germany
| | | | - Miriam Verwei
- TNO Zeist, the Netherlands; TNO Triskelion, Zeist, the Netherlands
| | - Peter Langguth
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Mainz, Germany.
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Liu CS, Liang X, Wei XH, Chen FL, Tang QF, Tan XM. Comparative pharmacokinetics of major bioactive components from Puerariae Radix-Gastrodiae Rhizome extracts and their intestinal absorption in rats. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1105:38-46. [PMID: 30562628 DOI: 10.1016/j.jchromb.2018.12.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 12/01/2018] [Accepted: 12/10/2018] [Indexed: 11/13/2022]
Abstract
Puerariae Radix (PR) and Gastrodiae Rhizome (GR) is frequently used in traditional herbal formulas to treat cardio-cerebral vascular diseases due to their synergistic effects. In this study, to elucidate the action mechanism of PR-GR in vivo, a simple and reliable ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) method for simultaneous determination of nine bioactive ingredients from PR-GR in plasma was developed and applied to a comparative pharmacokinetic study following oral administration of PR, GR, and PR-GR aqueous extracts in rats. The effect of GR on the absorption of components of PR was also investigated by single-pass intestinal perfusion study. Results showed that comparing to the single herbs, PR-GR extract significantly increased the systemic exposure of puerarin, 3'-hydroxypuerarin, 3'-methoxypuerarin, 6″-O-xylosylpuerarin, daidzin, genistein, and gastrodin. Moreover, the intestinal absorption of puerarin and daidzin could be improved by GR extract and inhibitors of P-glycoprotein and multidrug resistanceassociated protein 2, respectively. These results indicate that the combination of PR and GR increases the levels of their bioactive ingredients exposed in the blood, and GR increases the absorption of ingredients of PR may by inhibition of the efflux mediated by P-glycoprotein and multidrug resistanceassociated protein 2. This is the first report for the pharmacokinetics and intestinal absorption of PR-GR, which may explain their synergetic effects in the treatment of circulatory systematic diseases and provide a meaningful insight for their clinical applications.
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Affiliation(s)
- Chang-Shun Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, PR China
| | - Xiao Liang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, PR China
| | - Xiao-Han Wei
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, PR China
| | - Fei-Long Chen
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, PR China
| | - Qing-Fa Tang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, PR China
| | - Xiao-Mei Tan
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, PR China.
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Shokry DS, Waters LJ, Parkes GMB, Mitchell JC. Incorporating physiologically relevant mobile phases in micellar liquid chromatography for the prediction of human intestinal absorption. Biomed Chromatogr 2018; 32:e4351. [PMID: 30062715 PMCID: PMC6282790 DOI: 10.1002/bmc.4351] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 07/17/2018] [Accepted: 07/20/2018] [Indexed: 11/24/2022]
Abstract
Micellar liquid chromatography is a popular method used in the determination of a compound's lipophilicity. This study describes the use of the obtained micelle-water partition coefficient (log Pmw ) by such a method in the prediction of human intestinal absorption (HIA). As a result of the close resemblance of the novel composition of the micellar mobile phase to that of physiological intestinal fluid, prediction was deemed to be highly successful. The unique micellar mobile phase consisted of a mixed micellar mixture of lecithin and six bile salts, i.e. a composition matching that found in the human intestinal environment, prepared in ratios resembling those in the intestine. This is considered to be the first method to use a physiological mixture of biosurfactants in the prediction of HIA. As a result, a mathematical model with high predictive ability (R2 PRED = 81%) was obtained using multiple linear regression. The micelle-water partition coefficient (log Pmw ) obtained from micellar liquid chromatography was found to be a successful tool for prediction where the final optimum model included log Pmw and polar surface area as key descriptors with high statistical significance for the prediction of HIA. This can be attributed to the nature of the mobile phase used in this study which contains the lecithin-bile salt complex, thus forming a bilayer system and therefore mimicking absorption across the intestinal membrane.
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Affiliation(s)
- Dina S. Shokry
- Faculty of Engineering and Science, Medway Centre for Formulation ScienceUniversity of GreenwichKentUK
| | - Laura J. Waters
- School of Applied SciencesUniversity of HuddersfieldHuddersfieldUK
| | | | - John C. Mitchell
- Faculty of Engineering and Science, Medway Centre for Formulation ScienceUniversity of GreenwichKentUK
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Inoue M, Okamoto Y, Atsumi Y, Shiojiri M, Hidaka M, Tanaka T, Tsutsumi T, Shirasaka N, Tokumura A. Addition of high load of lysophosphatidic acid to standard and high-fat chows causes no significant changes of its circulating and peripheral tissue levels but affects body weight and visceral fat mass of mice. Biofactors 2018; 44:548-557. [PMID: 30368958 DOI: 10.1002/biof.1451] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 08/08/2018] [Accepted: 08/09/2018] [Indexed: 01/17/2023]
Abstract
Oral administration of lysophosphatidic acid (LPA), a critical intercellular lipid mediator, exerts wound healing and antiulcer effects on gastrointestinal system. To evaluate effects of food-derived LPA on body homeostasis, we measured LPA levels by liquid chromatography-tandem mass spectrometry in chows, feces, plasma, liver, and visceral fat of mice fed a normal or high-fat chow supplemented with or without LPA-rich soybean phospholipids for 30 days. Reductions in daily body weight gains and visceral fat mass were mainly related to lower chow intake by mice fed the LPA-rich high-fat chow, whereas reduced body weight gains and fat mass were mainly related to decreased intestinal triacylglycerol absorption in mice fed LPA-rich chow. Our results showed no significant increase in plasma, liver, or adipose LPA levels, even if a quite high LPA concentration (2.0%) in chows was ingested daily, suggesting limited effects of food-derived LPA on the lumen side of the digestive tract. © 2018 BioFactors, 44(6):548-557, 2018.
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Affiliation(s)
- Manami Inoue
- Department of Pharmaceutical Health Chemistry, Institute of Biomedical Sciences, Tokushima University, Tokushima, Japan
| | - Yoko Okamoto
- Department of Pharmaceutical Health Chemistry, Institute of Biomedical Sciences, Tokushima University, Tokushima, Japan
| | - Yuta Atsumi
- Bio Chemicals Department, Enzymes Division, Product Development Section, Nagase ChemteX Corporation, Fukuchiyama, Kyoto, Japan
| | - Masatoshi Shiojiri
- Bio Chemicals Department, Enzymes Division, Product Development Section, Nagase ChemteX Corporation, Fukuchiyama, Kyoto, Japan
| | - Mayumi Hidaka
- Department of Life Sciences, Faculty of Pharmacy, Yasuda Women's University, Asaminamiku, Hiroshima, Japan
| | - Tamotsu Tanaka
- Department of Pharmaceutical Health Chemistry, Institute of Biomedical Sciences, Tokushima University, Tokushima, Japan
| | - Toshihiko Tsutsumi
- Department of Pharmaceutics, Graduate School of Clinical Pharmacy, Kyushu University of Health and Welfare, Nobeoka, Japan
| | - Naoki Shirasaka
- Bio Chemicals Department, Enzymes Division, Product Development Section, Nagase ChemteX Corporation, Fukuchiyama, Kyoto, Japan
| | - Akira Tokumura
- Department of Pharmaceutical Health Chemistry, Institute of Biomedical Sciences, Tokushima University, Tokushima, Japan
- Department of Life Sciences, Faculty of Pharmacy, Yasuda Women's University, Asaminamiku, Hiroshima, Japan
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Marcucci G, Masi L, Ferrarì S, Haffner D, Javaid MK, Kamenický P, Reginster JY, Rizzoli R, Brandi ML. Phosphate wasting disorders in adults. Osteoporos Int 2018; 29:2369-2387. [PMID: 30014155 DOI: 10.1007/s00198-018-4618-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 06/19/2018] [Indexed: 12/14/2022]
Abstract
A cause of hypophosphatemia is phosphate wasting disorders. Knowledge concerning mechanisms involved in phosphate wasting disorders has greatly increased in the last decade by the identification of phosphatonins, among them FGF-23. FGF-23 is a primarily bone derived factor decreasing renal tubular reabsorption of phosphate and the synthesis of calcitriol. Currently, pharmacological treatment of these disorders offers limited efficacy and is potentially associated to gastrointestinal, renal, and parathyroid complications; therefore, efforts have been directed toward newer pharmacological strategies that target the FGF-23 pathway. This review focuses on phosphate metabolism, its main regulators, and phosphate wasting disorders in adults, highlighting the main issues related to diagnosis and current and new potential treatments.
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Affiliation(s)
- G Marcucci
- Metabolic Bone Diseases Unit, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - L Masi
- Metabolic Bone Diseases Unit, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - S Ferrarì
- Division of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - D Haffner
- Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, Hannover, Germany
| | - M K Javaid
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - P Kamenický
- Service d'Endocrinologie et des Maladies de la Reproduction, Centre de référence des Maladies Rares du métabolisme du calcium et du phosphore, Hopital de Bicêtre - AP-HP, 94275, Le Kremlin-Bicêtre, France
| | - J-Y Reginster
- Department of Public Health, Epidemiology and Health Economics, University of Liège, Liège, Belgium
| | - R Rizzoli
- Division of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - M L Brandi
- Metabolic Bone Diseases Unit, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy.
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Choksi YA, Reddy VK, Singh K, Barrett CW, Short SP, Parang B, Keating CE, Thompson JJ, Verriere TG, Brown RE, Piazuelo MB, Bader DM, Washington MK, Mittal MK, Brand T, Gobert AP, Coburn LA, Wilson KT, Williams CS. BVES is required for maintenance of colonic epithelial integrity in experimental colitis by modifying intestinal permeability. Mucosal Immunol 2018; 11:1363-1374. [PMID: 29907869 PMCID: PMC6162166 DOI: 10.1038/s41385-018-0043-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 03/31/2018] [Accepted: 04/15/2018] [Indexed: 02/04/2023]
Abstract
Blood vessel epicardial substance (BVES), or POPDC1, is a tight junction-associated transmembrane protein that modulates epithelial-to-mesenchymal transition (EMT) via junctional signaling pathways. There have been no in vivo studies investigating the role of BVES in colitis. We hypothesized that BVES is critical for maintaining colonic epithelial integrity. At baseline, Bves-/- mouse colons demonstrate increased crypt height, elevated proliferation, decreased apoptosis, altered intestinal lineage allocation, and dysregulation of tight junctions with functional deficits in permeability and altered intestinal immunity. Bves-/- mice inoculated with Citrobacter rodentium had greater colonic injury, increased colonic and mesenteric lymph node bacterial colonization, and altered immune responses after infection. We propose that increased bacterial colonization and translocation result in amplified immune responses and worsened injury. Similarly, dextran sodium sulfate (DSS) treatment resulted in greater histologic injury in Bves-/- mice. Two different human cell lines (Caco2 and HEK293Ts) co-cultured with enteropathogenic E. coli showed increased attaching/effacing lesions in the absence of BVES. Finally, BVES mRNA levels were reduced in human ulcerative colitis (UC) biopsy specimens. Collectively, these studies suggest that BVES plays a protective role both in ulcerative and infectious colitis and identify BVES as a critical protector of colonic mucosal integrity.
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Affiliation(s)
- Yash A Choksi
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Vishruth K Reddy
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Kshipra Singh
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Caitlyn W Barrett
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Sarah P Short
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Bobak Parang
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Cody E Keating
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Joshua J Thompson
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Thomas G Verriere
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Rachel E Brown
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - M Blanca Piazuelo
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - David M Bader
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - M Kay Washington
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Mukul K Mittal
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Thomas Brand
- Developmental Dynamics, Heart Science Centre, Imperial College London, London, UK
| | - Alain P Gobert
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Lori A Coburn
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Veterans Affairs Tennessee Valley Health Care System, Nashville, TN, USA
| | - Keith T Wilson
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN, USA
- Veterans Affairs Tennessee Valley Health Care System, Nashville, TN, USA
- Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Christopher S Williams
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA.
- Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN, USA.
- Veterans Affairs Tennessee Valley Health Care System, Nashville, TN, USA.
- Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN, USA.
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Deng J, Jhandey A, Zhu X, Yang Z, Yik KFP, Zuo Z, Lam TN. In silico drug absorption tract: An agent-based biomimetic model for human oral drug absorption. PLoS One 2018; 13:e0203361. [PMID: 30169515 PMCID: PMC6118387 DOI: 10.1371/journal.pone.0203361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 08/20/2018] [Indexed: 11/26/2022] Open
Abstract
Background An agent-based modeling approach has been suggested as an alternative to traditional, equation-based modeling methods for describing oral drug absorption. It enables researchers to gain a better understanding of the pharmacokinetic (PK) mechanisms of a drug. This project demonstrates that a biomimetic agent-based model can adequately describe the absorption and disposition kinetics both of midazolam and clonazepam. Methods An agent-based biomimetic model, in silico drug absorption tract (ISDAT), was built to mimic oral drug absorption in humans. The model consisted of distinct spaces, membranes, and metabolic enzymes, and it was altogether representative of human physiology relating to oral drug absorption. Simulated experiments were run with the model, and the results were compared to the referent data from clinical equivalence trials. Acceptable similarity was verified by pre-specified criteria, which included 1) qualitative visual matching between the clinical and simulated concentration-time profiles, 2) quantitative similarity indices, namely, weighted root mean squared error (RMSE), and weighted mean absolute percentage error (MAPE) and 3) descriptive similarity which requires less than 25% difference between key PK parameters calculated by the clinical and the simulated concentration-time profiles. The model and its parameters were iteratively refined until all similarity criteria were met. Furthermore, simulated PK experiments were conducted to predict bioavailability (F). For better visualization, a graphical user interface for the model was developed and a video is available in Supporting Information. Results Simulation results satisfied all three levels of similarity criteria for both drugs. The weighted RMSE was 0.51 and 0.92, and the weighted MAPE was 5.99% and 8.43% for midazolam and clonazepam, respectively. Calculated PK parameter values, including area under the curve (AUC), peak plasma drug concentration (Cmax), time to reach Cmax (Tmax), terminal elimination rate constant (Kel), terminal elimination half life (T1/2), apparent oral clearance (CL/F), and apparent volume of distribution (V/F), were reasonable compared to the referent values. The predicted absolute oral bioavailability (F) was 44% for midazolam (literature reported value, 31–72%) and 93% (literature reported value, ≥ 90%) for clonazepam. Conclusion The ISDAT met all the pre-specified similarity criteria for both midazolam and clonazepam, and demonstrated its ability to describe absorption kinetics of both drugs. Therefore, the validated ISDAT can be a promising platform for further research into the use of similar in silico models for drug absorption kinetics.
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Affiliation(s)
- Jianyuan Deng
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Anika Jhandey
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - Xiao Zhu
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Zhibo Yang
- Department of Computer Science, Stony Brook University, Stony Brook, NY, United States of America
| | - Kin Fu Patrick Yik
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Zhong Zuo
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Tai Ning Lam
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- * E-mail:
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Xu L, Cai J, Tian A, Qian K, Qin R, Qi S, Tan X, Qiu Y, Gong M, Han B, Hu X. The Effect of Prim-O-Glucosylcimifugin on Tryptase-Induced Intestinal Barrier Dysfunction in Caco-2 Cells. Biol Pharm Bull 2018; 41:1355-1361. [PMID: 29910215 DOI: 10.1248/bpb.b18-00059] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The intestinal barrier dysfunction is a critical pathological change in irritable bowel syndrome (IBS). The objective of this study was to evaluate the effect of Prim-O-glucosylcimifugin (POG) on intestinal barrier dysfunction and reveal possible molecular mechanisms. Human colon adenocarcinoma cell line (Caco-2) cell monolayers induced by tryptase (TRYP) were used to establish an intestinal barrier dysfunction model. Caco-2 cell monolayers from both functional and dysfunctional samples were treated with POG (30, 60 and 120 µg/mL) for 2, 8, 24, 36, 48 and 72 h. The Caco-2 cell monolayers were assessed by measurement of trans-epithelial electrical resistance (TEER) and percentage of fluorescein permeation (PFP). The expression of Protease Activated Receptor 2 (PAR-2) and myosin light chain kinase (MLCK) mRNA was analyzed by RT-PCR and the level of Zonula Occludens-1 (ZO-1) protein expression was determined by Western blot. In addition, the impact of POG on the distribution of the tight juction protein of Occludin was performed by immunofluorescence. Our results showed that POG elevated the TEER and decreased the PFP of the functional Caco-2 cell monolayers, as well as the dysfunctional Caco-2 cell monolayers. Furthermore, POG inhibited the expression of PAR-2 mRNA and MLCK mRNA and increased the level of ZO-1 protein expression in dysfunctional Caco-2 cells. The distribution of the Occludin proteins was ameliorated simultaneously. This study demonstrates that POG can enhance the intestinal barrier function of Caco-2 cell monolayers by inhibiting the expression of PAR-2 and MLCK and up-regulating the expression of ZO-1 protein, and ameliorated the distribution of Occludin protein.
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Affiliation(s)
- Lu Xu
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Jieyi Cai
- The First Affiliated Hospital of Guangdong Pharmaceutical University
| | - Aofei Tian
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Kai Qian
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Renan Qin
- Guangzhou Baiyun Mountain Hutchison Whampoa Traditional Chinese Medicine Co., Ltd
| | - Shaoyun Qi
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Xupeng Tan
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Yuqin Qiu
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Mengjuan Gong
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Bin Han
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
| | - Xuguang Hu
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University
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Li Q, Yang Y, Zhou T, Wang R, Li N, Zheng M, Li YY, Zhang JQ, Wu F, Yang BC, Ma YM, Ma BL. A Compositive Strategy to Study the Pharmacokinetics of TCMs: Taking Coptidis Rhizoma, and Coptidis Rhizoma-Glycyrrhizae Radix et Rhizoma as Examples. Molecules 2018; 23:molecules23082042. [PMID: 30111723 PMCID: PMC6222803 DOI: 10.3390/molecules23082042] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 08/07/2018] [Accepted: 08/11/2018] [Indexed: 12/30/2022] Open
Abstract
Pharmacokinetic studies are crucial for elucidating the effective constituents and formula compatibility of traditional Chinese medicines (TCMs). However, studies have usually been limited to single dosages and detection of systemic blood concentrations. To obtain comprehensive pharmacokinetic information, here we propose a multi-dosage and multi-sampling (blood from portal vein or systemic circulation, and liver) strategy to comparatively study the pharmacokinetics of multi-form TCMs, i.e., pure constituents, TCMs, or TCM formula extracts. Based on this strategy, we studied the pharmacokinetics of pure berberine, berberine in Coptidis Rhizoma (CRE), and berberine in Coptidis Rhizoma-Glycyrrhizae Radix et Rhizoma extracts (CR-GRE). After simple calculation and comparison of the obtained area under the curve (AUC) values, the results revealed the drastically different pharmacokinetic properties of pure berberine compared to CRE and CR-GRE. The results contribute to explaining the pharmacological loss of berberine activity after purification and the compatibility of the CR-GR drug pair. The results also innovatively showed that it was intestinal absorption that differentiated the pharmacokinetics of CRE and pure berberine, and CRE and CR-GRE. In conclusion, we propose a composite strategy to comparatively study the pharmacokinetics of TCMs, which could provide sufficient information to obtain a comprehensive view, before follow-up mechanism-of-action studies.
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Affiliation(s)
- Qiao Li
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Yan Yang
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Ting Zhou
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Rui Wang
- Engineering Research Center of Modern Preparation Technology of TCM of Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Na Li
- Department of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Min Zheng
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Yuan-Yuan Li
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Ji-Quan Zhang
- Engineering Research Center of Modern Preparation Technology of TCM of Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Fei Wu
- Engineering Research Center of Modern Preparation Technology of TCM of Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Bai-Can Yang
- Department of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Yue-Ming Ma
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Bing-Liang Ma
- Department of Pharmacology, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
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Oh AR, Sohn S, Lee J, Park JM, Nam KT, Hahm KB, Kim YB, Lee HJ, Cha JY. ChREBP deficiency leads to diarrhea-predominant irritable bowel syndrome. Metabolism 2018; 85:286-297. [PMID: 29669261 PMCID: PMC7400734 DOI: 10.1016/j.metabol.2018.04.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 04/04/2018] [Accepted: 04/10/2018] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Fructose malabsorption is a common digestive disorder in which absorption of fructose in the small intestine is impaired. An abnormality of the main intestinal fructose transporter proteins has been proposed as a cause for fructose malabsorption. However the underlying molecular mechanism for this remains unclear. In this study, we investigated whether carbohydrate response element-binding protein (ChREBP) plays a role in intestinal fructose absorption through the regulation of genes involved in fructose transport and metabolism and ion transport. METHODS Wild type (WT) and Chrebp knockout (KO) mice (6 or 8 weeks old) were fed a control diet (55% starch, 15% maltodextrin 10) or high-fructose diet (HFrD, 60% fructose, 10% starch) for 3-12 days. Body weight and food intake were measured, signs of fructose malabsorption were monitored, and the expression of genes involved in fructose transport/metabolism and ion transport was evaluated. Furthermore, transient transfection and chromatin immunoprecipitation were performed to show the direct interaction between ChREBP and carbohydrate response elements in the promoter of Slc2A5, which encodes the fructose transporter GLUT5. RESULTS Chrebp KO mice fed the control diet maintained a constant body weight, whereas those fed a HFrD showed significant weight loss within 3-5 days. In addition, Chrebp KO mice fed the HFrD exhibited a markedly distended cecum and proximal colon containing both fluid and gas, suggesting incomplete fructose absorption. Fructose-induced increases of genes involved in fructose transport (GLUT5), fructose metabolism (fructokinase, aldolase B, triokinase, and lactate dehydrogenase), and gluconeogenesis (glucose-6-phosphatase and fructose-1,6-bisphosphatase) were observed in the intestine of WT but not of Chrebp KO mice. Moreover the Na+/H+ exchanger NHE3, which is involved in Na+ and water absorption in the intestine, was significantly decreased in HFrD-fed Chrebp KO mice. Consistent with this finding, the high-fructose diet-fed Chrebp KO mice developed severe diarrhea. Results of chromatin immunoprecipitation assays showed a direct interaction of ChREBP with the Glut5 promoter, but not the Nhe3 promoter, in the small intestine. Ectopic co-expression of ChREBP and its heterodimer partner Max-like protein X activated the Glut5 promoter in Caco-2BBE cells. CONCLUSIONS ChREBP plays a key role in the dietary fructose transport as well as conversion into lactate and glucose through direct transcriptional control of genes involved in fructose transport, fructolysis, and gluconeogenesis. Moreover, ablation of Chrebp results in a severe diarrhea in mice fed a high-fructose diet, which is associated with the insufficient induction of GLUT5 in the intestine.
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Affiliation(s)
- Ah-Reum Oh
- Department of Biochemistry, Lee Gil Ya Cancer and Diabetes Institute, GAIHST, Gachon University College of Medicine, Incheon 21999, Republic of Korea
| | - Seonyong Sohn
- Department of Biochemistry, Lee Gil Ya Cancer and Diabetes Institute, GAIHST, Gachon University College of Medicine, Incheon 21999, Republic of Korea
| | - Junghoon Lee
- Department of Biochemistry, Lee Gil Ya Cancer and Diabetes Institute, GAIHST, Gachon University College of Medicine, Incheon 21999, Republic of Korea
| | - Jong-Min Park
- CHA Cancer Prevention Research Center, CHA Bio Complex, CHA University, Seongnam 13488, Republic of Korea
| | - Ki Taek Nam
- Severance Biomedical Science Institute, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Ki-Baik Hahm
- CHA Cancer Prevention Research Center, CHA Bio Complex, CHA University, Seongnam 13488, Republic of Korea
| | - Young-Bum Kim
- Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02215, USA
| | - Ho-Jae Lee
- Department of Biochemistry, Lee Gil Ya Cancer and Diabetes Institute, GAIHST, Gachon University College of Medicine, Incheon 21999, Republic of Korea
| | - Ji-Young Cha
- Department of Biochemistry, Lee Gil Ya Cancer and Diabetes Institute, GAIHST, Gachon University College of Medicine, Incheon 21999, Republic of Korea; Gachon Medical Research Institute, Gil Medical Center, Incheon 21565, Republic of Korea.
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Sharif Makhmal Zadeh B, Esfahani G, Salimi A. Permeability of Ciprofloxacin-Loaded Polymeric Micelles Including Ginsenoside as P-glycoprotein Inhibitor through a Caco-2 Cells Monolayer as an Intestinal Absorption Model. Molecules 2018; 23:E1904. [PMID: 30065147 PMCID: PMC6222528 DOI: 10.3390/molecules23081904] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 06/06/2018] [Accepted: 06/07/2018] [Indexed: 11/24/2022] Open
Abstract
The low oral bioavailability of ciprofloxacin is associated with two distinct challenges: its low aqueous solubility and efflux by p-glycoproteins (P-gp) in the intestinal membrane. Several studies were conducted in order to improve its solubility and permeability through the gastrointestinal membrane. In this study, in a full factorial design study, eight polymeric micelles were prepared and their characteristics, including particle size, loading and release rate were evaluated. Polymeric micelles demonstrated particle sizes below 190 nm and 27⁻88% loading efficiency. Drug release was affected by drug solubility, polymeric micelle erosion and swelling in simulated gastrointestinal fluids. An optimized polymeric micelle was prepared based on appropriate characteristics such as high drug loading and low particle size; and was used for a permeation study on Caco-2 cells. Optimized polymeric micelles with and without ginsenoside and ginsenoside alone enhanced drug permeability through Caco-2 cells significantly in the absorptive direction. The effect of ginsenoside was dose dependent and the maximum effect was seen in 0.23 mg/mL concentration. Results showed that P-gp may not be responsible for ciprofloxacin secretion into the gut. The main mechanism of ciprofloxacin transport through Caco-2 cells in both directions is active diffusion and P-gp has inhibitory effects on ciprofloxacin permeability in the absorptive direction that was blocked by ginsenoside and micelles without ginsenoside.
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Affiliation(s)
- Behzad Sharif Makhmal Zadeh
- Nanotechnology Research Center, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Golestan Ave, Ahvaz 67123, Iran.
| | - Golbarg Esfahani
- Nanotechnology Research Center, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Golestan Ave, Ahvaz 67123, Iran.
| | - Anayatollah Salimi
- Nanotechnology Research Center, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Golestan Ave, Ahvaz 67123, Iran.
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Moran ET. Nutrients central to maintaining intestinal absorptive efficiency and barrier integrity with fowl. Poult Sci 2018; 96:1348-1363. [PMID: 27665014 DOI: 10.3382/ps/pew337] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 08/05/2016] [Indexed: 01/10/2023] Open
Abstract
The small intestinal mucosa acts to recover nutrients from the lumen while providing a barrier against potential hazards. Its unstirred water layer (USWL) at the lumen interface involves membrane associated mucin linearly protruding from underlying microvilli that entangles secretory mucin released from local goblet cells. Both mucin sources are dominated by repetitive O-glycosylated areas dependant on threonine, serine, glycine, and proline. Secretory mucin differs from membrane attached mucin by further employing multiple cystines that interconnect these areas into a net-like molecular sieve. All of the glycosylated areas have ionizable acidic groups credited with reducing pH from that in the lumen to create a micro environment favoring enzymes finalizing digestion while optimizing nutrient terms for absorption. Erosion of the USWL and/or abuse of the membrane due to lumen threats require continuous repair. The aforementioned amino acids are necessary in substantial amounts while vitamin B6 collaborates with vitamin A as meaningful cofactors for mucin synthesis. Marginal inadequacies of these nutrients during inordinate demand are expected to impair mucin replacement. In turn, marginal increases in feed conversion likely occur while fostering the probability of necrotic enteritis together with gizzard erosions. Abuse of the absorptive membrane is of particular concern from fatty acid hydroperoxides because of their continual presence in feed and inability of the USWL to provide protection. These hydroperoxides threaten membrane integrity by their inclusion in micelles during digestive events with fat thereby permitting transit through the USWL. Once coalesced with membrane phospholipids, structural aberrations are visualized as interfering with nutrient recovery while enabling leakage of cell contents to potentiate wet excreta. Inclusion of dietary vitamin E along with vitamin A into micelles with fatty acid hydroperoxides provides relief by quenching further peroxidation. Assuring cystine, threonine, glycine, and serine that are directly available as such together with vitamins A, E, and B6 represents one approach toward optimizing maintenance of the intestinal mucosa.
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Tso P, Vurma M, Ko CW, Lee D, DeMichele S. Effect of mono- and diglycerides on the digestion and absorption of lutein in lymph fistula rats. Am J Physiol Gastrointest Liver Physiol 2018; 315:G95-G103. [PMID: 29470144 PMCID: PMC6109709 DOI: 10.1152/ajpgi.00236.2017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 02/16/2018] [Accepted: 02/16/2018] [Indexed: 01/31/2023]
Abstract
Breast milk lutein is better absorbed by infants than lutein delivered in infant formula. Therefore, we wanted to better understand the possible absorption differences of lutein in breast milk vs. that in infant formula by determining its bioavailability after gastric administration and whether the intestinal absorption of lutein can be improved by using new delivery vehicles. Study 1 compared the intestinal uptake,and the lymphatic and portal transport of lutein in conscious lymph fistula rats. Four groups of lymph- and portal vein-cannulated rats ( n = 8-10/group) were randomized to receive via gastric tube increasing doses (10, 20, 40, or 80 mg/kg) of 20% lutein in safflower oil (SO) suspension to assess whether there was a saturable level of lutein that could be absorbed and transported in lymph. Aliquots of hourly portal blood and lymph were taken for lutein and zeaxanthin analyses. The dose-response study showed that 20 mg/kg lutein was the saturable level of lymphatic lutein absorption with no lutein detected in portal circulation at any dosage level tested. Study 2 randomized five groups of lymph fistula rats ( n = 4-9/group) to receive 20 mg/kg lutein from either lutein in SO or lutein in four different mono- and diglyceride oils (MDGs). Gastric infusion of lutein suspended in MDG (20 mg/kg) significantly improved (71-211%, P < 0.05) lymphatic lutein output 2-6 h after lipid feeding vs. lutein in SO. Lymphatic zeaxanthin (10% of the lutein fed mixture) transport in both Study 1 and Study 2 followed that of lutein. We conclude that a mixture of MDGs helps solubilize lutein and facilitate gastrointestinal micelle formation, thus improving lymphatic lutein absorption compared with triglyceride oils. NEW & NOTEWORTHY This paper describes how lutein is digested and absorbed by the gastrointestinal tract by using the conscious lymph fistula rat model. Our dose-response study showed that absorption and lymphatic transport of lutein is a saturable process with no lutein detected in portal circulation at any dosage level tested. Our paper also provides insight into how this process can be improved by modifying the typical lipid mixtures carrying the lutein.
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Affiliation(s)
- Patrick Tso
- Department of Pathology and Laboratory Medicine, Metabolic Disease Institute, University of Cincinnati , Cincinnati, Ohio
| | - Mustafa Vurma
- Discovery and Product Research and Development, Abbott Nutrition, Abbott Laboratories , Columbus, Ohio
| | - Chih-Wei Ko
- Department of Pathology and Laboratory Medicine, Metabolic Disease Institute, University of Cincinnati , Cincinnati, Ohio
| | - Dana Lee
- Department of Pathology and Laboratory Medicine, Metabolic Disease Institute, University of Cincinnati , Cincinnati, Ohio
| | - Stephen DeMichele
- Discovery and Product Research and Development, Abbott Nutrition, Abbott Laboratories , Columbus, Ohio
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Sølling ASK, Tougaard BG, Harsløf T, Langdahl B, Brockstedt HK, Byg KE, Ivarsen P, Ystrøm IK, Mose FH, Isaksson GL, Hansen MSS, Nagarajah S, Ejersted C, Bendstrup E, Rejnmark L. Non-parathyroid hypercalcemia associated with paraffin oil injection in 12 younger male bodybuilders: a case series. Eur J Endocrinol 2018; 178:K29-K37. [PMID: 29599408 DOI: 10.1530/eje-18-0051] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 03/29/2018] [Indexed: 11/08/2022]
Abstract
INTRODUCTION Injection of paraffin oil to augment muscles size is a troubling phenomenon known to cause a foreign body reaction with formation of granulomas. In a few case reports, long-term side effects have been reported in terms of hypercalcemia and renal failure. METHODS We identified a case series of 12 male bodybuilders presenting with non-parathyroid hypercalcemia who previously had injected paraffin oil to increase muscles size. RESULTS At admission, all patients had moderate-to-severe hypercalcemia with suppressed PTH levels and impaired renal function. Calcitriol levels were within the normal range or slightly elevated. Follow-up measurements showed marked hypercalciuria with nearly normal levels of bone turnover markers. A correlation was found between levels of peptidyl dipeptidase and calcitriol (R = 0.812, P = 0.050). Treatment with antiresorptive agents seemed less effective than glucocorticoids, which resulted in a significantly lowering of ionized calcium levels and improved renal function, although no patients were cured by this treatment. Immunosuppression with azathioprine or mycophenolate may have a glucocorticoid-saving effect. One patient had surgery with removal of affected muscle tissue, without any apparent effect on plasma calcium levels. CONCLUSION The hypercalcemia and associated hypercalciuria seems to be due to an intestinal hyperabsorption of calcium. It remains to be elucidated, whether an increased calcitriol synthesis within granulomas is the only (main) mechanism by which intestinal calcium absorption is increased. Glucocorticoids seem most appropriate as the first choice for treatment. Bodybuilders should be warned against use of intramuscular oil injections (and other substances), as this may have severe adverse health consequences.
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Affiliation(s)
| | - Birgitte G Tougaard
- Department of Nephrology and Internal MedicineRegional Hospital Kolding, Kolding, Denmark
| | - Torben Harsløf
- Department of Endocrinology and Internal MedicineTHG, Aarhus University Hospital, Aarhus, Denmark
| | - Bente Langdahl
- Department of Endocrinology and Internal MedicineTHG, Aarhus University Hospital, Aarhus, Denmark
| | | | - Keld-Erik Byg
- Department of RheumatologyOdense University Hospital, Odense, Denmark
| | - Per Ivarsen
- Department of NephrologyAarhus University Hospital, Aarhus, Denmark
| | | | - Frank Holden Mose
- University Clinic in Nephrology and HypertensionRegional Hospital West Jutland and Aarhus University, Holstebro, Denmark
| | - Gustaf Lissel Isaksson
- Department of Nephrology and Internal MedicineRegional Hospital Kolding, Kolding, Denmark
| | - Morten Steen Svarer Hansen
- Department of Nephrology and Internal MedicineRegional Hospital Kolding, Kolding, Denmark
- Department of EndocrinologyOdense University Hospital, Odense, Denmark
| | - Subagini Nagarajah
- Department of Nephrology and Internal MedicineRegional Hospital Kolding, Kolding, Denmark
- Department of Cardiovascular and Renal ResearchInstitute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | | | - Elisabeth Bendstrup
- Department of Respiratory Diseases and AllergyAarhus University Hospital, Aarhus, Denmark
| | - Lars Rejnmark
- Department of Endocrinology and Internal MedicineTHG, Aarhus University Hospital, Aarhus, Denmark
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Affiliation(s)
- C J Taylor
- Division of Child Health, University of Sheffield, UK
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Ayaz MM, Sajid M, Das SN, Hanif M. Report: An ex vivo up-take of levamisole molecules by cestode (Monezia expensa) of goat (Capra hirsa) and its detection through RP-HPLC. Pak J Pharm Sci 2018; 31:961-966. [PMID: 29716880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Detection of various molecules of drugs remained a prime issue especially in tissues of animals, humans and in their target parasites. The cestode/tapeworms pose a dilemma because of their weird body composition and uptake pattern of nutrients and medicines especially through absorption by tegument. We selected levamisole; thought to be potent antiparasitic/ani-cestodal drug. The uptake of levamisole (LEV) through cestodeal tissues is studied through HPCL in this paper. High performance liquid chromatography technique has been utilized to know the uptake of levamisole in tissues of cestodes of Goat (Monezia expensa) in small ruminants. The drug was exposed to M. expensa by in vitro till its death or a parasite ceases its movement. The tissue/ part of proglattids of the M. expensa were homogenized with some modifications and levamisole extraction was performed with liquid phase extraction method. The evaporation of solvent was done and the residual cestodal tissues were cleaned by solid phase. After the solid phase extraction method, the recovery of drug, detection and quantification of levamisole from cestodal tissues was determined through Reverse Phase Column High Performance Liquid Chromatography (RP-HPLC). Levamisole (LEV) molecules assay was obtained on a C18 reverse-phase (20um, 6mm x 150mm) column at flow rate of 1ml/min using acetonitrile and ammonium acetate as mobile phase and UV detection was done at 254nm. The development of method of Levamisole (LEV) detection from cestodal tissues by HPLC in vitro samples has been demonstrated first time in Pakistan, which can provide the solution of parasitic control and provide in sight in to the uptake of anti cestodal drugs either against human or livestock parasites.
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Affiliation(s)
- Muhammad Mazhar Ayaz
- Department of Pathobiology, Faculty of Veterinary Sciences, Bahauddin Zakariya University, Multan, Pakistan
| | | | | | - Muhammad Hanif
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
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Shibao CA, Celedonio JE, Tamboli R, Sidani R, Love-Gregory L, Pietka T, Xiong Y, Wei Y, Abumrad NN, Abumrad NA, Flynn CR. CD36 Modulates Fasting and Preabsorptive Hormone and Bile Acid Levels. J Clin Endocrinol Metab 2018; 103:1856-1866. [PMID: 29546316 PMCID: PMC6446573 DOI: 10.1210/jc.2017-01982] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 03/07/2018] [Indexed: 01/16/2023]
Abstract
CONTEXT Abnormal fatty acid (FA) metabolism contributes to diabetes and cardiovascular disease. The FA receptor CD36 has been linked to risk of metabolic syndrome. In rodents CD36 regulates various aspects of fat metabolism, but whether it has similar actions in humans is unknown. We examined the impact of a coding single-nucleotide polymorphism in CD36 on postprandial hormone and bile acid (BA) responses. OBJECTIVE To examine whether the minor allele (G) of coding CD36 variant rs3211938 (G/T), which reduces CD36 level by ∼50%, influences hormonal responses to a high-fat meal (HFM). DESIGN Obese African American (AA) women carriers of the G allele of rs3211938 (G/T) and weight-matched noncarriers (T/T) were studied before and after a HFM. SETTING Two-center study. PARTICIPANTS Obese AA women. INTERVENTION HFM. MAIN OUTCOME MEASURES Early preabsorptive responses (10 minutes) and extended excursions in plasma hormones [C-peptide, insulin, incretins, ghrelin fibroblast growth factor (FGF)19, FGF21], BAs, and serum lipoproteins (chylomicrons, very-low-density lipoprotein) were determined. RESULTS At fasting, G-allele carriers had significantly reduced cholesterol and glycodeoxycholic acid and consistent but nonsignificant reductions of serum lipoproteins. Levels of GLP-1 and pancreatic polypeptide (PP) were reduced 60% to 70% and those of total BAs were 1.8-fold higher. After the meal, G-allele carriers displayed attenuated early (-10 to 10 minute) responses in insulin, C-peptide, GLP-1, gastric inhibitory peptide, and PP. BAs exhibited divergent trends in G allele carriers vs noncarriers concomitant with differential FGF19 responses. CONCLUSIONS CD36 plays an important role in the preabsorptive hormone and BA responses that coordinate brain and gut regulation of energy metabolism.
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Affiliation(s)
- Cyndya A Shibao
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Correspondence and Reprint Requests: Charles Robb Flynn, PhD, Department of Surgery, MRBIV Room 8465A, 2213 Garland Avenue, Vanderbilt University Medical Center, Nashville, Tennessee 37232. E-mail: ; or Cyndya Shibao, MD, Department of Medicine, Division of Medicine, 562 Preston Research Building, Vanderbilt University Medical Center, Nashville, Tennessee 37232. E-mail:
| | - Jorge E Celedonio
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Robyn Tamboli
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Reem Sidani
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Latisha Love-Gregory
- Department of Medicine, Center for Human Nutrition, Washington University School of Medicine, St. Louis, Missouri
| | - Terri Pietka
- Department of Medicine, Center for Human Nutrition, Washington University School of Medicine, St. Louis, Missouri
| | - Yanhua Xiong
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Yan Wei
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of General Surgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Naji N Abumrad
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Nada A Abumrad
- Department of Medicine, Center for Human Nutrition, Washington University School of Medicine, St. Louis, Missouri
| | - Charles Robb Flynn
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Correspondence and Reprint Requests: Charles Robb Flynn, PhD, Department of Surgery, MRBIV Room 8465A, 2213 Garland Avenue, Vanderbilt University Medical Center, Nashville, Tennessee 37232. E-mail: ; or Cyndya Shibao, MD, Department of Medicine, Division of Medicine, 562 Preston Research Building, Vanderbilt University Medical Center, Nashville, Tennessee 37232. E-mail:
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Lertsuwan K, Wongdee K, Teerapornpuntakit J, Charoenphandhu N. Intestinal calcium transport and its regulation in thalassemia: interaction between calcium and iron metabolism. J Physiol Sci 2018; 68:221-232. [PMID: 29484538 PMCID: PMC10717198 DOI: 10.1007/s12576-018-0600-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 02/17/2018] [Indexed: 01/19/2023]
Abstract
Osteoporosis and derangement of calcium homeostasis are common complications of thalassemia. Despite being an important process for bone and calcium metabolism, little is known about intestinal calcium transport in thalassemia. Recent reports of decreases in both intestinal calcium transport and bone mineral density in thalassemic patients and animal models suggested that defective calcium absorption might be a cause of thalassemic bone disorder. Herein, the possible mechanisms associated with intestinal calcium malabsorption in thalassemia are discussed. This includes alterations in the calcium transporters and hormonal controls of the transcellular and paracellular intestinal transport systems in thalassemia. In addition, the effects of iron overload on intestinal calcium absorption, and the reciprocal interaction between iron and calcium transport in thalassemia are elaborated. Understanding the mechanisms underlining calcium malabsorption in thalassemia would lead to development of therapeutic agents and mineral supplements that restore calcium absorption as well as prevent osteoporosis in thalassemic patients.
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Affiliation(s)
- Kornkamon Lertsuwan
- Department of Biochemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok, 10400, Thailand
- Center of Calcium and Bone Research (COCAB), Faculty of Science, Mahidol University, Rama VI Road, Bangkok, 10400, Thailand
| | - Kannikar Wongdee
- Center of Calcium and Bone Research (COCAB), Faculty of Science, Mahidol University, Rama VI Road, Bangkok, 10400, Thailand
- Office of Academic Management, Faculty of Allied Health Sciences, Burapha University, Chonburi, Thailand
| | - Jarinthorn Teerapornpuntakit
- Center of Calcium and Bone Research (COCAB), Faculty of Science, Mahidol University, Rama VI Road, Bangkok, 10400, Thailand
- Department of Physiology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Narattaphol Charoenphandhu
- Center of Calcium and Bone Research (COCAB), Faculty of Science, Mahidol University, Rama VI Road, Bangkok, 10400, Thailand.
- Department of Physiology, Faculty of Science, Mahidol University, Rama VI Road, Bangkok, 10400, Thailand.
- Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, Thailand.
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Abstract
Several proteins have been implicated in fatty acid (FA) transport by enterocytes including the scavenger receptor CD36 (SR-B2), the scavenger receptor B1 (SR-B1) a member of the CD36 family and the FA transport protein 4 (FATP4). Here, we review the regulation of enterocyte FA uptake and its function in lipid absorption including prechylomicron formation, assembly and transport. Emphasis is given to CD36, which is abundantly expressed along the digestive tract of rodents and humans and has been the most studied. We also address the pleiotropic functions of CD36 that go beyond lipid absorption and metabolism to include recent evidence of its impact on intestinal homeostasis and barrier maintenance. Areas of progress involving contribution of membrane phospholipid remodeling and of cytosolic FA-binding proteins, FABP1 and FABP2 to fat absorption will be covered. © 2018 American Physiological Society. Compr Physiol 8:493-507, 2018.
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Affiliation(s)
- Vincenza Cifarelli
- Department of Internal Medicine, Center for Human Nutrition, Washington University School of Medicine, St Louis, Missouri, USA
| | - Nada A. Abumrad
- Department of Internal Medicine, Center for Human Nutrition, Washington University School of Medicine, St Louis, Missouri, USA
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82
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Chan LKY, Wang Y, Ng EKW, Leung PS. Na + /H + exchanger 3 blockade ameliorates type 2 diabetes mellitus via inhibition of sodium-glucose co-transporter 1-mediated glucose absorption in the small intestine. Diabetes Obes Metab 2018; 20:709-717. [PMID: 29110392 DOI: 10.1111/dom.13151] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 10/12/2017] [Accepted: 10/29/2017] [Indexed: 01/02/2023]
Abstract
AIM To elucidate the role of Na+ /H+ exchanger 3 (NHE3) in sodium-glucose co-transporter 1 (SGLT1)-mediated small intestinal brush border membrane (BBM) glucose absorption and its functional implications in type 2 diabetes mellitus (T2DM). MATERIALS AND METHODS Human jejunal samples were obtained from patients undergoing gastrectomy. 14 C-glucose absorption was measured by liquid scintillation counting. NHE3 expression was suppressed by siRNA-mediated knockdown or augmented in Caco2 cells. Glucose and insulin tolerance in db/db and m+/db mice was assessed with oral and intraperitoneal glucose tolerance tests, and an intraperitoneal insulin tolerance test. Insulin resistance and β-cell function were assessed using homeostatic model assessment of insulin resistance and β-cell function. RESULTS NHE3 expression was upregulated in db/db mouse jejunal BBM and high-glucose-treated Caco2 cells. NHE3 blockade impaired SGLT1-mediated glucose absorption in human jejunum, m+/db and db/db mouse jejunums, and Caco2 cells, via serum/glucocorticoid-regulated kinase 1 (SGK1). NHE3 knockdown suppressed SGLT1-mediated glucose uptake and reduced mRNA and protein levels of SGK1 and SGLT1, which were conversely enhanced by NHE3 overexpression. Chronic S3226 treatment diminished postprandial glucose levels and ameliorated glucose intolerance in db/db mice. CONCLUSION NHE3 is essential in the modulation of small intestinal BBM glucose absorption. Our findings provide a rationale for future possible clinical application of NHE3 for treatment of T2DM through reducing intestinal glucose uptake and counteracting postprandial hyperglycaemia.
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Affiliation(s)
- Leo K Y Chan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Yi Wang
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Enders K W Ng
- Department of Surgery, Prince of Wales Hospital, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Po Sing Leung
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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83
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Xiao C, Stahel P, Carreiro AL, Buhman KK, Lewis GF. Recent Advances in Triacylglycerol Mobilization by the Gut. Trends Endocrinol Metab 2018; 29:151-163. [PMID: 29306629 DOI: 10.1016/j.tem.2017.12.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 11/30/2017] [Accepted: 12/04/2017] [Indexed: 11/26/2022]
Abstract
Dietary lipid absorption and lipoprotein secretion by the gut are important in maintaining whole-body energy homeostasis and have significant implications for health and disease. The processing of dietary lipids, including storage within and subsequent mobilization and transport from enterocyte cytoplasmic lipid droplets or other intestinal lipid storage pools (including the secretary pathway, lamina propria and lymphatics) and secretion of chylomicrons, involves coordinated steps that are subject to various controls. This review summarizes recent advances in our understanding of the mechanisms that underlie lipid storage and mobilization by small intestinal enterocytes and the intestinal lymphatic vasculature. Therapeutic targeting of lipid processing by the gut may provide opportunities for the treatment and prevention of dyslipidemia, and for improving health status.
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Affiliation(s)
- Changting Xiao
- Departments of Medicine and Physiology, Division of Endocrinology and Metabolism, Banting and Best Diabetes Centre, University of Toronto, Toronto, ON, Canada
| | - Priska Stahel
- Departments of Medicine and Physiology, Division of Endocrinology and Metabolism, Banting and Best Diabetes Centre, University of Toronto, Toronto, ON, Canada
| | - Alicia L Carreiro
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907, USA
| | - Kimberly K Buhman
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907, USA
| | - Gary F Lewis
- Departments of Medicine and Physiology, Division of Endocrinology and Metabolism, Banting and Best Diabetes Centre, University of Toronto, Toronto, ON, Canada.
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84
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Ainousah B, Perrier J, Dunn C, Khadra I, Wilson CG, Halbert G. Dual Level Statistical Investigation of Equilibrium Solubility in Simulated Fasted and Fed Intestinal Fluid. Mol Pharm 2017; 14:4170-4180. [PMID: 29072917 PMCID: PMC5735376 DOI: 10.1021/acs.molpharmaceut.7b00869] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 10/24/2017] [Accepted: 10/26/2017] [Indexed: 11/28/2022]
Abstract
The oral route is the preferred option for drug administration but contains the inherent issue of drug absorption from the gastro-intestinal tract (GIT) in order to elicit systemic activity. A prerequisite for absorption is drug dissolution, which is dependent upon drug solubility in the variable milieu of GIT fluid, with poorly soluble drugs presenting a formulation and biopharmaceutical challenge. Multiple factors within GIT fluid influence solubility ranging from pH to the concentration and ratio of amphiphilic substances, such as phospholipid, bile salt, monoglyceride, and cholesterol. To aid in vitro investigation simulated intestinal fluids (SIF) covering the fasted and fed state have been developed. SIF media is complex and statistical design of experiment (DoE) investigations have revealed the range of solubility values possible within each state due to physiological variability along with the media factors and factor interactions which influence solubility. However, these studies require large numbers of experiments (>60) and are not feasible or sensible within a drug development setting. In the current study a smaller dual level, reduced experimental number (20) DoE providing three arms covering the fasted and fed states along with a combined analysis has been investigated. The results indicate that this small scale investigation is feasible and provides solubility ranges that encompass published data in human and simulated fasted and fed fluids. The measured fasted and fed solubility ranges are in agreement with published large scale DoE results in around half of the cases, with the differences due to changes in media composition between studies. Indicating that drug specific behaviors are being determined and that careful media factor and concentration level selection is required in order to determine a physiologically relevant solubility range. The study also correctly identifies the major single factor or factors which influence solubility but it is evident that lower significance factors (for example bile salt) are not picked up due to the lower sample number employed. A similar issue is present with factor interactions with only a limited number available for study and generally not determined to have a significant solubility impact due to the lower statistical power of the study. The study indicates that a reduced experimental number DoE is feasible, will provide solubility range results with identification of major solubility factors however statistical limitations restrict the analysis. The approach therefore represents a useful initial screening tool that can guide further in depth analysis of a drug's behavior in gastrointestinal fluids.
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Affiliation(s)
- Bayan
E Ainousah
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Jeremy Perrier
- 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 Halbert
- Strathclyde Institute of
Pharmacy and Biomedical Sciences, University
of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
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85
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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86
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Affiliation(s)
- Salvatore Benvenga
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
- Master Program on Childhood, Adolescent and Women's Endocrine Health, University of Messina, Messina, Italy
- Interdepartmental Program of Molecular & Clinical Endocrinology, and Women's Endocrine Health, University hospital, Policlinico Universitario G. Martino, Messina, Italy
| | - Flavia Di Bari
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy.
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Heizati M, Li N, Shao L, Yao X, Wang Y, Hong J, Zhou L, Zhang D, Chang G, Abulikemu S. Does increased serum d-lactate mean subclinical hyperpermeability of intestinal barrier in middle-aged nonobese males with OSA? Medicine (Baltimore) 2017; 96:e9144. [PMID: 29245360 PMCID: PMC5728975 DOI: 10.1097/md.0000000000009144] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Few attention has been directed to the potential effects of intermittent hypoxia experienced in obstructive sleep apnea on the integrity and permeability of intestinal barrier, particularly in adults. Therefore, we evaluated alteration in serum d-lactate concentration in middle-aged males with obstructive sleep apnea to value permeability of intestinal barrier. In this current cross-sectional study, consecutive 159 males were studied. Obstructive sleep apnea was determined by polysomnography and apnea hypopnea index ≥15 event/h was defined as obstructive sleep apnea. D-lactate, lipopolysaccharide binding protein, interleukin-1β, interleukin-6 and tumor necrosis factor-α by ELISA method. Nonobese obstructive sleep apnea (OSA) males showed significantly higher serum d-LA than did nonobese [1374.35 (816-1735) μg/L vs 1166.43 (730-1815) μg/L, P = .018], and obese non-OSA ones [1374.35 (816-1735) μg/L vs 1188.75 (736-1557) μg/L, P = .045], whereas serum LBP levels showed no differences within groups. Serum IL-1β was also slightly higher in nonobese OSA males, but with statistical significance, than in nonobese (19.39 ± 4.67 ng/L vs 17.25 ± 3.66 ng/L, P = .041), and obese non-OSA ones (19.39 ± 4.67 ng/L vs 17.42 ± 3.79 ng/L, P = .047), whereas other biomarkers, IL-6 and TNF-a did not show significant differences among groups. In stepwise multiple linear regression analysis, serum d-LA was independently positively associated with AHI (B = 5.577, P = .022), and ODI3 (B = 4.550, P = .024) and negatively with LSaO2 (B = -12.234, P = .019). Finally, we arrived at a conclusion that serum d-lactate was increased in nonobese middle-aged males with obstrutive sleep apnea, possibly suggesting existence of subclinical disruption of intestinal barrier, and showed significant associations with inflammatory mediators, possibly being involved in systemic inflammation of obstructive sleep apnea.
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88
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Chiang PC, Sutherlin D, Pang J, Salphati L. Investigation of Dose-Dependent Factors Limiting Oral Bioavailability: Case Study With the PI3K-δ Inhibitor. J Pharm Sci 2017; 105:1802-1809. [PMID: 27238480 DOI: 10.1016/j.xphs.2016.04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 03/31/2016] [Accepted: 04/01/2016] [Indexed: 11/20/2022]
Abstract
It is understood that a potential issue for drugs with poor aqueous solubility is low oral absorption. If oral exposure issues arise when working with a low solubility drug candidate, the common action is to rely on enabling formulations to solve the issue. However, this approach becomes troublesome in the pre-clinical setting where compound absorption, distribution, metabolism, excretion properties are suboptimal and more factors limiting bioavailability may be at play. A narrow focus on solubility enhancement without a full understanding of compound absorption, distribution, metabolism, excretion properties can produce data that cloak the actual phenomena driving exposure. Compound 1 is a potent and selective PI3Kdelta inhibitor with poor aqueous solubility. In a pharmacokinetic study on dogs, exposure was found to be less than dose-linear. Besides the solubility, further investigations were conducted to identify other factors limiting oral exposure. It was observed that these limiting factors are dose dependent. Results from modeling pharmacokinetic under low-dose conditions suggest that exposure is significantly limited by metabolism and no exposure improvements should be expected from enabled formulations. Furthermore, enabling formulations are expected to exert a beneficial influence at higher doses. An in vivo test was conducted in dogs to verify this phenomenon.
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Affiliation(s)
- Po-Chang Chiang
- Small Molecule Research, Genentech, 1 DNA Way, South San Francisco, California 94080.
| | - Daniel Sutherlin
- Small Molecule Research, Genentech, 1 DNA Way, South San Francisco, California 94080
| | - Jodie Pang
- Small Molecule Research, Genentech, 1 DNA Way, South San Francisco, California 94080
| | - Laurent Salphati
- Small Molecule Research, Genentech, 1 DNA Way, South San Francisco, California 94080
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Qin Y, Nyheim H, Haram EM, Moritz JM, Hustvedt SO. A novel self-micro-emulsifying delivery system (SMEDS) formulation significantly improves the fasting absorption of EPA and DHA from a single dose of an omega-3 ethyl ester concentrate. Lipids Health Dis 2017; 16:204. [PMID: 29037249 PMCID: PMC5644165 DOI: 10.1186/s12944-017-0589-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 10/03/2017] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Absorption of EPA and DHA from Omega-3-acid ethyl ester (EE) concentrate supplements occurs most efficiently when taken in context of a fatty meal; adequate fat intake is required to release bile salts that emulsify and pancreatic enzymes that digest omega-3-containing lipids in the intestine. Current guidelines recommend reduction in fat intake and therefore there is a need to optimize the absorption of Omega-3 in those consuming low-fat or no-fat meals. To this end, BASF has developed an Absorption Acceleration Technology, a novel self-micro-emulsifying delivery system (SMEDS) formulation of highly concentrated Omega-3-acid EE which enables rapid emulsification and microdroplet formation upon entering the aqueous environment of the gut therefore enhances the absorption. METHODS Two separate single dose, crossover studies were conducted to determine the relative bioavailability of omega-3-acid EE concentrate, either as a novel SMEDS formulation (PRF-021) or as control, in healthy fasted male and female adults at two dose levels (Study 1 "low dose": 630 mg EPA + DHA in PRF-021 vs. 840 mg EPA + DHA in control; Study 2 "high dose": 1680 mg EPA + DHA in PRF-021 vs. 3360 mg EPA + DHA in control). Blood samples were collected immediately before supplementation and at defined time intervals for 48 h. Plasma concentration of total EPA and DHA were determined for pharmacokinetic analysis, area under the curve (AUC) and maximum observed concentration (Cmax) was determined. RESULTS Total EPA plus DHA absorption from SMEDS formulation PRF-021 were 6.4 and 11.5 times higher compared to control in low- and high-dose studies respectively, determined as the ratio of baseline corrected, dose normalized AUC0-24h of PRF-021 over that of control. EPA and DHA individually showed differing levels of enhancement: the AUC0-24h ratio for EPA was 23.8 and 25.7 in low and high dose studies, respectively, and the AUC0-24h ratio for DHA was 3.6 and 5.6 in low and high dose studies, respectively. Cmax was also increased for both EPA and DHA 2.7- to 9.2-fold. CONCLUSION PRF-021 is a novel SMEDS formulation of Omega-3-acid EE demonstrating a marked improvement in absorption of a single dose of EPA and DHA EE under fasted conditions. This allows adequate absorption of Omega-3 from the supplement without the requirement of a high-fat meal.
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Affiliation(s)
- Yan Qin
- Pronova Biopharma Norge AS, part of BASF, P.O. Box 420, NO-1327 Lysaker, Norway
| | - Hilde Nyheim
- Pronova Biopharma Norge AS, part of BASF, P.O. Box 420, NO-1327 Lysaker, Norway
| | - Else Marie Haram
- Pronova Biopharma Norge AS, part of BASF, P.O. Box 420, NO-1327 Lysaker, Norway
| | | | - Svein Olaf Hustvedt
- Pronova Biopharma Norge AS, part of BASF, P.O. Box 420, NO-1327 Lysaker, Norway
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90
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Reznicek J, Ceckova M, Ptackova Z, Martinec O, Tupova L, Cerveny L, Staud F. MDR1 and BCRP Transporter-Mediated Drug-Drug Interaction between Rilpivirine and Abacavir and Effect on Intestinal Absorption. Antimicrob Agents Chemother 2017; 61:e00837-17. [PMID: 28696229 PMCID: PMC5571350 DOI: 10.1128/aac.00837-17] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 06/24/2017] [Indexed: 01/11/2023] Open
Abstract
Rilpivirine (TMC278) is a highly potent nonnucleoside reverse transcriptase inhibitor (NNRTI) representing an effective component of combination antiretroviral therapy (cART) in the treatment of HIV-positive patients. Many antiretroviral drugs commonly used in cART are substrates of ATP-binding cassette (ABC) and/or solute carrier (SLC) drug transporters and, therefore, are prone to pharmacokinetic drug-drug interactions (DDIs). The aim of our study was to evaluate rilpivirine interactions with abacavir and lamivudine on selected ABC and SLC transporters in vitro and assess its importance for pharmacokinetics in vivo Using accumulation assays in MDCK cells overexpressing selected ABC or SLC drug transporters, we revealed rilpivirine as a potent inhibitor of MDR1 and BCRP, but not MRP2, OCT1, OCT2, or MATE1. Subsequent transport experiments across monolayers of MDCKII-MDR1, MDCKII-BCRP, and Caco-2 cells demonstrated that rilpivirine inhibits MDR1- and BCRP-mediated efflux of abacavir and increases its transmembrane transport. In vivo experiments in male Wistar rats confirmed inhibition of MDR1/BCRP in the small intestine, leading to a significant increase in oral bioavailability of abacavir. In conclusion, rilpivirine inhibits MDR1 and BCRP transporters and may affect pharmacokinetic behavior of concomitantly administered substrates of these transporters, such as abacavir.
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Affiliation(s)
- Josef Reznicek
- Charles University, Faculty of Pharmacy in Hradec Kralove, Department of Pharmacology and Toxicology, Hradec Kralove, Czech Republic
| | - Martina Ceckova
- Charles University, Faculty of Pharmacy in Hradec Kralove, Department of Pharmacology and Toxicology, Hradec Kralove, Czech Republic
| | - Zuzana Ptackova
- Charles University, Faculty of Pharmacy in Hradec Kralove, Department of Pharmacology and Toxicology, Hradec Kralove, Czech Republic
| | - Ondrej Martinec
- Charles University, Faculty of Pharmacy in Hradec Kralove, Department of Pharmacology and Toxicology, Hradec Kralove, Czech Republic
| | - Lenka Tupova
- Charles University, Faculty of Pharmacy in Hradec Kralove, Department of Pharmacology and Toxicology, Hradec Kralove, Czech Republic
| | - Lukas Cerveny
- Charles University, Faculty of Pharmacy in Hradec Kralove, Department of Pharmacology and Toxicology, Hradec Kralove, Czech Republic
| | - Frantisek Staud
- Charles University, Faculty of Pharmacy in Hradec Kralove, Department of Pharmacology and Toxicology, Hradec Kralove, Czech Republic
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Nilaweera KN, Cabrera-Rubio R, Speakman JR, O'Connor PM, McAuliffe A, Guinane CM, Lawton EM, Crispie F, Aguilera M, Stanley M, Boscaini S, Joyce S, Melgar S, Cryan JF, Cotter PD. Whey protein effects on energy balance link the intestinal mechanisms of energy absorption with adiposity and hypothalamic neuropeptide gene expression. Am J Physiol Endocrinol Metab 2017; 313:E1-E11. [PMID: 28325732 DOI: 10.1152/ajpendo.00356.2016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 03/17/2017] [Accepted: 03/17/2017] [Indexed: 02/08/2023]
Abstract
We tested the hypothesis that dietary whey protein isolate (WPI) affects the intestinal mechanisms related to energy absorption and that the resulting energy deficit is compensated by changes in energy balance to support growth. C57BL/6 mice were provided a diet enriched with WPI with varied sucrose content, and the impact on energy balance-related parameters was investigated. As part of a high-sucrose diet, WPI reduced the hypothalamic expression of pro-opiomelanocortin gene expression and increased energy intake. The energy expenditure was unaffected, but epididymal weight was reduced, indicating an energy loss. Notably, there was a reduction in the ileum gene expression for amino acid transporter SLC6a19, glucose transporter 2, and fatty acid transporter 4. The composition of the gut microbiota also changed, where Firmicutes were reduced. The above changes indicated reduced energy absorption through the intestine. We propose that this mobilized energy in the adipose tissue and caused hypothalamic changes that increased energy intake, acting to counteract the energy deficit arising in the intestine. Lowering the sucrose content in the WPI diet increased energy expenditure. This further reduced epididymal weight and plasma leptin, whereupon hypothalamic ghrelin gene expression and the intestinal weight were both increased. These data suggest that when the intestine-adipose-hypothalamic pathway is subjected to an additional energy loss (now in the adipose tissue), compensatory changes attempt to assimilate more energy. Notably, WPI and sucrose content interact to enable the component mechanisms of this pathway.
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Affiliation(s)
- Kanishka N Nilaweera
- Food Biosciences Department, Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland;
| | - Raul Cabrera-Rubio
- Food Biosciences Department, Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland
| | - John R Speakman
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, Scotland
| | - Paula M O'Connor
- Food Biosciences Department, Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland
| | - AnneMarie McAuliffe
- Food Biosciences Department, Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland
| | - Caitriona M Guinane
- Food Biosciences Department, Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland
| | - Elaine M Lawton
- Food Biosciences Department, Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland
| | - Fiona Crispie
- Food Biosciences Department, Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland
| | - Mònica Aguilera
- APC Microbiome Institute, University College Cork, Cork, Ireland
| | - Maurice Stanley
- APC Microbiome Institute, University College Cork, Cork, Ireland
- School of Biochemistry and Cell Biology, University College Cork, Cork, Ireland
| | - Serena Boscaini
- Food Biosciences Department, Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland
- Department of Anatomy and Neurosciences, University College Cork, Cork, Ireland; and
| | - Susan Joyce
- APC Microbiome Institute, University College Cork, Cork, Ireland
- School of Biochemistry and Cell Biology, University College Cork, Cork, Ireland
| | - Silvia Melgar
- APC Microbiome Institute, University College Cork, Cork, Ireland
| | - John F Cryan
- APC Microbiome Institute, University College Cork, Cork, Ireland
- Department of Anatomy and Neurosciences, University College Cork, Cork, Ireland; and
| | - Paul D Cotter
- Food Biosciences Department, Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland
- APC Microbiome Institute, University College Cork, Cork, Ireland
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Alkaade S, Vareedayah AA. A primer on exocrine pancreatic insufficiency, fat malabsorption, and fatty acid abnormalities. Am J Manag Care 2017; 23:S203-S209. [PMID: 28727474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Exocrine pancreatic insufficiency (EPI) is characterized by a deficiency of exocrine pancreatic enzymes, resulting in deficits in digestion of all macronutrients, with deficiencies in digestion of fats being the most clinically relevant. The leading cause of EPI is chronic pancreatitis. However, many other causes and conditions may be implicated, including cystic fibrosis, pancreatic duct obstruction, gastric and pancreatic surgery, diabetes mellitus and other conditions. Physical and biochemical causes of EPI include decreased production and secretion of lipase, increased lipase destruction, pancreatic duct obstruction, decreased lipase stimulation and degradation, as well as gastrointestinal motility disorders. EPI is largely diagnosed clinically, and is often identified by symptoms such as steatorrhea, weight loss, abdominal discomfort, and abdominal bloating. Lifestyle modifications (eg, smoking cessation, limiting or avoiding alcoholic drinks, and reducing dietary fat intake) and exogenous pancreatic enzyme supplements are commonly used to help restore normal digestion and absorption of dietary nutrients in patients with EPI.
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Affiliation(s)
- Samer Alkaade
- Saint Louis University, 3635 Vista Ave at Grand Blvd, St Louis, MO 63110. E-mail:
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93
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Abstract
Iron is an essential trace element ensuring many functions in the body. However, excess iron can be toxic with deleterious consequences on function and tissue integrity. The understanding of the molecular and cellular mechanisms allowing iron level to be kept at physiological concentration has greatly progressed in recent years, in particular with the identification of the iron-regulatory hormone, hepcidin and its receptor ferroportin, the sole iron exporter known to date. This discovery has improved our ability to diagnose and manage iron disorders and offered new therapeutic perspectives for an important class of human diseases. However many questions remain to be answered. With the development of high-throughput techniques and the "omics" strategies (transcriptomic, proteomic, metabolomic, etc.), we should be able in the coming years to identify new iron regulatory pathways and to assign original roles for iron in normal cellular processes but also in diseases. À more complete iron regulatory network should be established with the identification of the crosstalk between intracellular and systemic iron homeostasis.
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Affiliation(s)
- S Vaulont
- Département endocrinologie, métabolisme et diabète, 24, rue du Faubourg-Saint-Jacques, 75014, Paris; Institut Cochin, INSERM U1016, CNRS UMR 8104, Paris, France.
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94
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Hong B, Chen H, Han J, Xie Q, He J, Bai K, Dong Y, Yi R. A Study of 11-[³H]-Tetrodotoxin Absorption, Distribution, Metabolism and Excretion (ADME) in Adult Sprague-Dawley Rats. Mar Drugs 2017; 15:md15060159. [PMID: 28574462 PMCID: PMC5484109 DOI: 10.3390/md15060159] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 05/19/2017] [Accepted: 05/25/2017] [Indexed: 11/16/2022] Open
Abstract
Tetrodotoxin (TTX) is a powerful sodium channel blocker that in low doses can safely relieve severe pain. Studying the absorption, distribution, metabolism and excretion (ADME) of TTX is challenging given the extremely low lethal dose. We conducted radiolabeled ADME studies in Sprague-Dawley rats. After a single dose of 6 μg/(16 μCi/kg) 11-[³H]TTX, pharmacokinetics of plasma total radioactivity were similar in male and female rats. Maximum radioactivity (5.56 ng Eq./mL) was reached in 10 min. [³H]TTX was below detection in plasma after 24 h. The area under the curve from 0 to 8 h was 5.89 h·ng Eq./mL; mean residence time was 1.62 h and t½ was 2.31 h. Bile secretion accounted for 0.43% and approximately 51% of the dose was recovered in the urine, the predominant route of elimination. Approximately 69% was recovered, suggesting that hydrogen tritium exchange in rats produced tritiated water excreted in breath and saliva. Average total radioactivity in the stomach, lungs, kidney and intestines was higher than plasma concentrations. Metabolite analysis of plasma, urine and feces samples demonstrated oxidized TTX, the only identified metabolite. In conclusion, TTX was rapidly absorbed and excreted in rats, a standard preclinical model used to guide the design of clinical trials.
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Affiliation(s)
- Bihong Hong
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China.
- Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
| | - Hui Chen
- Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
| | - Jiacai Han
- Department of Inspection and Quarantine of Goods, Pingtan Entry-Exit Inspection & Quarantine Bureau of P.R.C, Pingtan 350400, China.
| | - Quanling Xie
- Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
| | - Jianlin He
- Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
| | - Kaikai Bai
- Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
| | - Yanming Dong
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China.
| | - Ruizao Yi
- Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China.
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95
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Wang Y, Brasseur JG. Three-dimensional mechanisms of macro-to-micro-scale transport and absorption enhancement by gut villi motions. Phys Rev E 2017; 95:062412. [PMID: 28709220 DOI: 10.1103/physreve.95.062412] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Indexed: 06/07/2023]
Abstract
We evaluate the potential for physiological control of intestinal absorption by the generation of "micromixing layers" (MMLs) induced by coordinated motions of mucosal villi coupled with lumen-scale "macro" eddying motions generated by gut motility. To this end, we apply a three-dimensional (3D) multigrid lattice-Boltzmann model of a lid-driven macroscale cavity flow with microscale fingerlike protuberances at the lower surface. Integrated with a previous 2D study of leaflike villi, we generalize to 3D the 2D mechanisms found there to enhance nutrient absorption by controlled villi motility. In three dimensions, increased lateral spacing within villi within groups that move axially with the macroeddy reduces MML strength and absorptive enhancement relative to two dimensions. However, lateral villi motions create helical 3D particle trajectories that enhance absorption rate to the level of axially moving 2D leaflike villi. The 3D enhancements are associated with interesting fundamental adjustments to 2D micro-macro-motility coordination mechanisms and imply a refined potential for physiological or pharmaceutical control of intestinal absorption.
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Affiliation(s)
- Yanxing Wang
- School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Department of Mechanical and Nuclear Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - James G Brasseur
- Department of Mechanical and Nuclear Engineering, Pennsylvania State University, University Park, PA 16802, USA
- Department of Aerospace Engineering Sciences, University of Colorado Boulder, Boulder, CO 80309, USA
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96
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Jonker A, Yu P. The Occurrence, Biosynthesis, and Molecular Structure of Proanthocyanidins and Their Effects on Legume Forage Protein Precipitation, Digestion and Absorption in the Ruminant Digestive Tract. Int J Mol Sci 2017; 18:E1105. [PMID: 28531145 PMCID: PMC5455013 DOI: 10.3390/ijms18051105] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 05/08/2017] [Accepted: 05/15/2017] [Indexed: 12/28/2022] Open
Abstract
Forages grown in temperate regions, such as alfalfa (Medicago sativa L.) and white clover (Trefolium repens L.), typically have a high nutritional value when fed to ruminants. Their high protein content and degradation rate result, however, in poor utilization of protein from the forage resulting in excessive excretion of nitrogen into the environment by the animal. Proanthocyanindins (also known as condensed tannins) found in some forage legumes such as birdsfoot trefoil (Lotus corniculatus L.), bind to dietary protein and can improve protein utilization in the animal. This review will focus on (1) the occurrence of proanthocyanidins; (2) biosynthesis and structure of proanthocyanidins; (3) effects of proanthocyanidins on protein metabolism; (4) protein precipitating capacity of proanthocyanidins and their effects on true intestinal protein adsorption by ruminants; and (5) effect on animal health, animal performance and environmental emissions.
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Affiliation(s)
- Arjan Jonker
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK S7N 5A8, Canada.
- Grasslands Research Centre, AgResearch Ltd., Tennent Drive, Private Bag 11008, Palmerston North 4442, New Zealand.
| | - Peiqiang Yu
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK S7N 5A8, Canada.
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97
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Muscher-Banse AS, Marholt L, Eigendorf N, Wilkens MR, Schröder B, Breves G, Cehak A. Segmental diversity of phosphate transport along the intestinal axis in horses. J Anim Sci 2017; 95:165-172. [PMID: 28177365 DOI: 10.2527/jas.2016.0939] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
For horses, distinct differences in intestinal phosphate transport have been postulated to account for the unique features of hind gut fermentation compared to other monogastric animals and ruminants. So far published data on mechanisms and underlying transport proteins involved in intestinal phosphate transport in the horse are still missing. Therefore we investigated intestinal phosphate transport in horses at both functional and molecular levels. Segmental diversity of intestinal phosphate transport along the intestinal axis was documented using the Ussing chamber technique. A transcellular phosphate secretion in the jejunum was confirmed. Furthermore, 2 sodium-dependent phosphate cotransporters, NaPiIIb and PiT1, were first detected in the equine intestine at mRNA level with PiT1 being expressed in both the small and large intestine, and NaPiIIb being solely expressed in the large intestine. In the colon, unidirectional net flux rates of phosphate were significantly greater compared to flux rates in other segments ( < 0.005) suggesting the colon as a major site for phosphate absorption in horses. Phosphate transport in the colon was mainly transcellular and mediated by a sodium-gradient as documented by Ussing chamber experiments and uptake of phosphate into colonic brush border membrane vesicles. In summary, the present study demonstrated mechanisms and transporters of intestinal phosphate transport in equine intestinal tissues with distinct differences between intestinal segments providing a new basis for a better understanding of intestinal phosphate transport in horses.
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98
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Xing S, Song Y, Liang JB, Faseleh Jahromi M, Shokryazda P, Mi J, Zhu C, Wang J, Liao X. In vitro assessment on effect of duodenal contents on the lead (Pb 2+) binding capacity of two probiotic bacterial strains. Ecotoxicol Environ Saf 2017; 139:78-82. [PMID: 28113114 DOI: 10.1016/j.ecoenv.2017.01.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 01/06/2017] [Accepted: 01/06/2017] [Indexed: 06/06/2023]
Abstract
In vitro Lead (Pb2+) binding capacity of two probiotic bacteria strains, namely Bifidobacterium longumBB79 and Lactobacillus pentosusITA23, was assessed following incubation with the intestinal contents (IC) of laying hens. Results of this study demonstrated that IC treatment significantly enhanced (P<0.01) Pb2+ binding capacity of both bacterial strains. Fourier transform infrared analysis indicated that several functional groups (O-H or N-H, C-H, C˭O, C-O, and C-O-C) on the bacteria cell wall involved in metal ion binding were altered after IC incubation, and new groups appeared between the 3700cm-1 and 4000cm-1bands. Transmission electron microscopy demonstrated that after incubation with IC, unidentified IC components created new binding sites on the bacterial cell surface. These particles also changed the mechanism of Pb2+ binding of the two strains from intracellular accumulation to extracellular adsorption.
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Affiliation(s)
- Sicheng Xing
- College of Animal Science, South China Agriculture University, Guangzhou 510642, China
| | - Ying Song
- College of Animal Science, South China Agriculture University, Guangzhou 510642, China
| | - Juan Boo Liang
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Mohammad Faseleh Jahromi
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Serdang 43400, Malaysia; Agriculture Biotechnology Research Institute of Iran (ABRII), East and North‑East Branch, P.O.B. 91735 844, Mashhad, Iran
| | - Parisa Shokryazda
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Serdang 43400, Malaysia; Agriculture Biotechnology Research Institute of Iran (ABRII), East and North‑East Branch, P.O.B. 91735 844, Mashhad, Iran
| | - Jiandui Mi
- College of Animal Science, South China Agriculture University, Guangzhou 510642, China
| | - Cui Zhu
- Agro-biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Jie Wang
- College of Food Science, South China Agriculture University, Guangzhou 510642, China
| | - Xindi Liao
- College of Animal Science, South China Agriculture University, Guangzhou 510642, China.
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99
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Sunuwar L, Asraf H, Donowitz M, Sekler I, Hershfinkel M. The Zn 2+-sensing receptor, ZnR/GPR39, upregulates colonocytic Cl - absorption, via basolateral KCC1, and reduces fluid loss. Biochim Biophys Acta Mol Basis Dis 2017; 1863:947-960. [PMID: 28093242 PMCID: PMC5557417 DOI: 10.1016/j.bbadis.2017.01.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 01/10/2017] [Accepted: 01/12/2017] [Indexed: 12/13/2022]
Abstract
Administration of zinc, as a complement to oral rehydration solutions, effectively diminishes duration and severity of diarrhea, but it is not known whether it merely fulfills a nutritional deficiency, or if zinc has a direct role of regulating solute absorption. We show that Zn2+ acts via a specific receptor, ZnR/GPR39, to reduce fluid loss. Intestinal fluid secretion triggered by cholera toxin (CTx) was lower in WT mice compared to ZnR/GPR39 KO. In the absence of dietary Zn2+ we observed similar fluid accumulation in WT and ZnR/GPR39 KO mice, indicating that Zn2+ and ZnR/GPR39 are both required for a beneficial effect of Zn2+ in diarrhea. In primary colonocytes and in Caco-2 colonocytic cells, activation of ZnR/GPR39 enhanced Cl- transport, a critical factor in diarrhea, by upregulating K+/Cl- cotransporter (KCC1) activity. Importantly, we show basolateral expression of KCC1 in mouse and human colonocytes, thus identifying a novel Cl- absorption pathway. Finally, inhibition of KCC-dependent Cl- transport enhanced CTx-induced fluid loss. Altogether, our data indicate that Zn2+ acting via ZnR/GPR39 has a direct role in controlling Cl- absorption via upregulation of basolateral KCC1 in the colon. Moreover, colonocytic ZnR/GPR39 and KCC1 reduce water loss during diarrhea and may therefore serve as effective drug targets.
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Affiliation(s)
- Laxmi Sunuwar
- Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Hila Asraf
- Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Mark Donowitz
- Department of Medicine, Division of Gastroenterology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Israel Sekler
- Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Michal Hershfinkel
- Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.
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100
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Nicolas JM, Bouzom F, Hugues C, Ungell AL. Oral drug absorption in pediatrics: the intestinal wall, its developmental changes and current tools for predictions. Biopharm Drug Dispos 2017; 38:209-230. [PMID: 27976409 PMCID: PMC5516238 DOI: 10.1002/bdd.2052] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 11/21/2016] [Accepted: 11/30/2016] [Indexed: 12/14/2022]
Abstract
The dissolution, intestinal absorption and presystemic metabolism of a drug depend on its physicochemical characteristics but also on numerous physiological (e.g. gastrointestinal pH, volume, transit time, morphology) and biochemical factors (e.g. luminal enzymes and flora, intestinal wall enzymes and transporters). Over the past decade, evidence has accumulated indicating that these factors may differ in children and adults resulting in age-related changes in drug exposure and drug response. Thus, drug dosage may require adjustment for the pediatric population to ensure the desired therapeutic outcome and to avoid side-effects. Although tremendous progress has been made in understanding the effects of age on intestinal physiology and function, significant knowledge gaps remain. Studying and predicting pharmacokinetics in pediatric patients remains challenging due to ethical concerns associated with clinical trials in this vulnerable population, and because of the paucity of predictive in vitro and in vivo animal assays. This review details the current knowledge related to developmental changes determining intestinal drug absorption and pre-systemic metabolism. Supporting experimental approaches as well as physiologically based pharmacokinetic modeling are also discussed together with their limitations and challenges. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Jean-Marie Nicolas
- Non-Clinical Development Department, UCB Biopharma sprl, Braine-l'Alleud, Belgium
| | - François Bouzom
- Non-Clinical Development Department, UCB Biopharma sprl, Braine-l'Alleud, Belgium
| | - Chanteux Hugues
- Non-Clinical Development Department, UCB Biopharma sprl, Braine-l'Alleud, Belgium
| | - Anna-Lena Ungell
- Non-Clinical Development Department, UCB Biopharma sprl, Braine-l'Alleud, Belgium
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