1
|
Mahmoudpour SH, Valerio L, Douxfils J, Mahan CE, Jankowski M, Quitzau K, Konstantinides SV, Barco S. Potential Drug Interactions between Recombinant Interleukin-2 and Direct Oral Anticoagulants: Indirect Evidence from In Vivo Animal Studies. Hamostaseologie 2020; 40:679-686. [PMID: 32325520 DOI: 10.1055/a-1120-4064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Recombinant interleukin-2 (rIL-2) is indicated for metastatic renal cell carcinoma and melanoma. Over recent years low-dose rIL-2 has been studied for the treatment of autoimmune diseases and acute coronary syndrome because of its ability to expand and activate T regulatory (Treg) cells. However, several medical conditions potentially benefiting from rIL-2 administrations are characterized by an intrinsic prothrombotic risk, thus requiring concurrent anticoagulation. In our systematic review of the literature, we investigated the potential for drug interactions between oral anticoagulants and rIL-2 by assessing the influence of rIL-2 administration on transporters and cytochromes determining the pharmacokinetics of (direct) oral anticoagulants. We extracted data from 12 studies, consisting of 11 animal studies and one study in humans. Eight studies investigated the pharmacokinetics of P-glycoprotein (P-gp) substrates and reported that the intraperitoneal rIL-2 administration may inhibit intestinal P-gp. Four studies on hepatic cytochrome P450 yielded conflicting results. The only human study included in this systematic review concluded that rIL-2 suppresses the hepatic cytochrome P450, but only if given at higher doses. Based on the results from animal studies, the co-administration of rIL-2 and dabigatran etexilate, a substrate of intestinal P-gp, may lead to higher dabigatran plasma concentrations and bioavailability. Human studies should confirm whether this potential interaction is clinically relevant.
Collapse
Affiliation(s)
- Seyed Hamidreza Mahmoudpour
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Mainz, Germany.,Department of Biometry and Bioinformatics, Institute for Medical Biostatistics, Epidemiology, and Informatics (IMBEI), University Medical Center Mainz, Mainz, Germany
| | - Luca Valerio
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Mainz, Germany
| | - Jonathan Douxfils
- Department of Pharmacy, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Namur, Belgium
| | - Charles E Mahan
- Presbyterian Healthcare Services, University of New Mexico, Albuquerque, United States
| | - Marius Jankowski
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Mainz, Germany
| | - Kurt Quitzau
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Mainz, Germany
| | - Stavros V Konstantinides
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Mainz, Germany.,Department of Cardiology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Stefano Barco
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Mainz, Germany.,Clinic of Angiology, University Hospital and University of Zurich, Zurich, Switzerland
| |
Collapse
|
2
|
Interferon-alpha improves docetaxel antitumoral and antimetastatic efficiency in Lewis lung carcinoma bearing mice. Life Sci 2012; 91:843-51. [PMID: 23047021 DOI: 10.1016/j.lfs.2012.08.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 08/09/2012] [Accepted: 08/27/2012] [Indexed: 11/22/2022]
Abstract
AIMS Interferon-alpha (IFN-α) was shown to reduce P-glycoprotein (P-gp) expression and activity in several tissues. The purpose of this study was to evaluate the impact of IFN-α pretreatment on the antitumoral and antimetastatic, Docetaxel (DTX, P-gp substrate), on Lewis Lung Cancer (3LL) bearing mice and to correlate it to DTX pharmacokinetics. MAIN METHODS Six groups of C57/Bl6 mice received subcutaneous (s.c.) 2.10(6) 3LL cells, then IFN-α 4MIU/kg for 7days, then received or did not receive i.v. or oral DTX (30mg/kg). Pharmacokinetic studies were done on a part of the mice: DTX concentrations were assessed in plasma and tumors, where AUC were estimated with the Bailer method, and half-lives and MRT were determined with a non-compartmental analysis. Tumor growth was assessed more than 21days: animals were then sacrificed and lung metastases number was counted. Kaplan-Meier analysis was made to analyze survival data during the survey period. KEY FINDINGS DTX i.v. associated with IFN-α significantly improved mouse survival (19.6±0.6days vs. 17.1±0.8days for control mice, p=0.047) with greater antimetastatic effects (87.5% reduction in the number of metastases compared to control mice). The effect on tumor growth was not modified within the IFN-α/DTX i.v. treated groups when compared to mice receiving DTX i.v. alone. The pharmacokinetic analysis showed an increase of DTX concentrations in tumors at 30min after DTX i.v. administration and an increase in the oral bioavailability of orally given DTX following an IFN-α treatment. SIGNIFICANCE Our study established that IFN-α increases DTX uptake in tumors, improves its antitumoral efficiency and improves animals' survival.
Collapse
|
3
|
Drug transport into the central nervous system: using newer findings about the blood–brain barriers. Drug Deliv Transl Res 2012; 2:152-9. [DOI: 10.1007/s13346-012-0058-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
4
|
Manford F, Riffo-Vasquez Y, Spina D, Page CP, Hutt AJ, Moore V, Johansson F, Forbes B. Lack of difference in pulmonary absorption of digoxin, a P-glycoprotein substrate, in mdr1a-deficient and mdr1a-competent mice. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.60.10.0006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Although in-vitro experiments have suggested that P-glycoprotein (P-gp) may have an important influence on the disposition of inhaled drugs, the effect of P-gp on absorption from the lung in-vivo has not been reported previously. The aim of this study was to compare the pulmonary absorption of digoxin, a well-characterised substrate for P-gp, in mdr1a (–/–) (P-gp-deficient) and mdr1a (+/+) (P-gp-competent) mice. Digoxin was administered by intratracheal instillation over 3–4 s, a method demonstrated to result in dispersion of the dose to all regions of the lung. Drug distribution was determined in the lungs, plasma, brain, heart, liver and kidney of individual mice after 5, 10, 30, 60 and 90 min. Digoxin was cleared rapidly from the lung after intratracheal administration. No differences were observed in the maximum serum concentrations between mdr1a (+/+) and mdr1a (–/–) mice (37.8 ± 6.9 and 38.8 ± 15.8 ng mL−1, respectively). The serum concentration versus time profiles were similar in both strains; the area under the drug serum concentration versus time curve (AUC) was 2010 and 1812 ng mL−1 min in mdr1a (–/–) and mdr1a (+/+) mice, respectively. For organs harvested at the end of the experiment (90 min), the only significant difference between the strains was the markedly elevated concentration of digoxin in the brains of mdr1a (–/–) mice. In conclusion, digoxin is rapidly absorbed from the mouse lung following tracheal instillation, with no difference in the rate or extent of absorption between mdr1a-deficient and -competent mice. This suggests that, in contrast to the scenario suggested by in-vitro data, P-gp in the respiratory epithelium may have little influence on the disposition of drugs that are well absorbed from the lung.
Collapse
Affiliation(s)
- Fergus Manford
- King's College London, Pharmaceutical Science Division, 150 Stamford Street, London, UK
| | - Yanira Riffo-Vasquez
- King's College London, Sackler Institute of Pulmonary Pharmacology, Pharmaceutical Science Division, 5th floor Hodgkin Building, Guy's Campus, London, UK
| | - Domenico Spina
- King's College London, Sackler Institute of Pulmonary Pharmacology, Pharmaceutical Science Division, 5th floor Hodgkin Building, Guy's Campus, London, UK
| | - Clive P Page
- King's College London, Sackler Institute of Pulmonary Pharmacology, Pharmaceutical Science Division, 5th floor Hodgkin Building, Guy's Campus, London, UK
| | - Andrew J Hutt
- King's College London, Pharmaceutical Science Division, 150 Stamford Street, London, UK
| | - Vanessa Moore
- AstraZeneca R&D Charnwood, Bakewell Road, Loughborough, UK
| | | | - Ben Forbes
- King's College London, Pharmaceutical Science Division, 150 Stamford Street, London, UK
| |
Collapse
|
5
|
Delivery of peptide and protein drugs over the blood-brain barrier. Prog Neurobiol 2009; 87:212-51. [PMID: 19395337 DOI: 10.1016/j.pneurobio.2008.12.002] [Citation(s) in RCA: 177] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2007] [Revised: 11/11/2008] [Accepted: 12/17/2008] [Indexed: 12/12/2022]
Abstract
Peptide and protein (P/P) drugs have been identified as showing great promises for the treatment of various neurodegenerative diseases. A major challenge in this regard, however, is the delivery of P/P drugs over the blood-brain barrier (BBB). Intense research over the last 25 years has enabled a better understanding of the cellular and molecular transport mechanisms at the BBB, and several strategies for enhanced P/P drug delivery over the BBB have been developed and tested in preclinical and clinical-experimental research. Among them, technology-based approaches (comprising functionalized nanocarriers and liposomes) and pharmacological strategies (such as the use of carrier systems and chimeric peptide technology) appear to be the most promising ones. This review combines a comprehensive overview on the current understanding of the transport mechanisms at the BBB with promising selected strategies published so far that can be applied to facilitate enhanced P/P drug delivery over the BBB.
Collapse
|
6
|
Hosten B, Abbara C, Petit B, Dauvin A, Bourasset F, Farinotti R, Gonin P, Bonhomme-Faivre L. Effect of Interleukin-2 Pretreatment on Paclitaxel Absorption and Tissue Disposition after Oral and Intravenous Administration in Mice. Drug Metab Dispos 2008; 36:1729-35. [DOI: 10.1124/dmd.107.019091] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
|
7
|
Ben Reguiga M, Bonhomme-Faivre L, Farinotti R. Bioavailability and tissular distribution of docetaxel, a P-glycoprotein substrate, are modified by interferon-alpha in rats. J Pharm Pharmacol 2007; 59:401-8. [PMID: 17331344 DOI: 10.1211/jpp.59.3.0010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Interferon-alpha (IFN-alpha) inhibits intestinal P-glycoprotein (P-gp) expression in rats. In the present study, the effects of repeated pre-treatment with recombinant human INF-alpha (rhIFN-alpha) on oral and intravenous pharmacokinetics of a P-gp substrate, docetaxel (DTX; Taxotere) were investigated in a rat model. The bioavailability and distribution in different organs were also studied. Sprague-Dawley rats were subcutaneously pre-treated with either rhIFN-alpha for 8 days (4MIU kg(-1), once daily) or with pegylated-IFN-alpha (ViraferonPeg; 60 microg kg(-1), Days 1, 4 and 7). The rats were then distributed into sub-groups (n = 5-6) according to the pre-treatment type, and received one dose of [(14)C]DTX (20 mgkg(-1)) either orally or intravenously. Pharmacokinetics studies were then performed over 240 min, at the end of which tissues (intestine, liver, kidneys, lung, heart and brain) were immediately removed for radioactivity quantitation. Non-pegylated and pegylated IFN-alpha both increased DTX oral bioavailability parameters: C(max) (17.0+/-4.0 microg L(-1) (P < 0.02) and 18+/-5.5 microg L(-1) (P < 0.05), respectively, vs 7.4+/-2.5 microg L(-1) for the control) and AUC (0.036+/-0.010 microg h mL(-1) (P < 0.01) and 0.033+/-0.009 microg h mL(-1) (P < 0.01), respectively, versus 0.012+/-0.004 microg h mL(-1) for the control). IFN-alpha also delayed DTX absorption from 60 min in controls to about 95 min and 80 min in non-pegylated and pegylated treated animals, respectively. However, IFN-alpha did not affect intravenous DTX pharmacokinetics and it had a limited effect on tissue distribution at 240 min. [(14)C]DTX was decreased in intestine and enhanced in brain in both pre-treated groups. rhIFN-alpha modified the P-gp-dependent pharmacokinetics of DTX, limited its intestinal efflux and markedly enhanced its oral bioavailability.
Collapse
Affiliation(s)
- Makrem Ben Reguiga
- University of Paris-Sud, Clinical Pharmacy Department (UPRES 2706), Faculty of Pharmacy, 92296 Châtenay Malabry, France
| | | | | |
Collapse
|
8
|
|
9
|
Renton KW. Regulation of drug metabolism and disposition during inflammation and infection. Expert Opin Drug Metab Toxicol 2006; 1:629-40. [PMID: 16863429 DOI: 10.1517/17425255.1.4.629] [Citation(s) in RCA: 113] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The expression and activity of cytochrome P450 (CYP) is altered during periods of infectious disease or when an inflammatory response is activated. Most of the major forms of CYP are affected in this manner and this leads to a decrease in the capacity of the liver and other organs to handle drugs, chemicals and some endogenous compounds. The loss in drug metabolism is predominantly an effect resulting from the production of cytokines and the modulation of the transcription factors that control the expression of specific CYP forms. In clinical medicine numerous examples have been reported indicating the occurrence of compromised drug clearance and changes to pharmacokinetics during disease states with an inflammatory component or during infections. For any drug that is metabolised by CYP and has a narrow therapeutic index, there is a significant risk in placing patients in a position where an infection or inflammatory response might lead to aberrant drug handling and an adverse drug response.
Collapse
Affiliation(s)
- Kenneth W Renton
- Dalhousie University, Department of Pharmacology, Faculty of Medicine, Halifax, Nova Scotia, B3H 4H7, Canada.
| |
Collapse
|
10
|
Hosten B, Challuau D, Gil S, Bouquet C, Marion S, Perricaudet M, Di Palma M, Farinotti R, Bonhomme-Faivre L. Recombinant interleukin-2 pre-treatment increases anti-tumor response to paclitaxel by affecting lung P-glycoprotein expression on the Lewis lung carcinoma. Anticancer Drugs 2006; 17:195-9. [PMID: 16428938 DOI: 10.1097/00001813-200602000-00011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The aim of the present study was to examine modifications of anti-tumor activity and toxicity of paclitaxel (PLX) when given p.o. after recombinant interleukin-2 (rIL-2) to Lewis lung carcinoma-bearing mice. PLX was given orally to mice at the dose of 15 mg/kg on day 8 and 30 mg/kg on day 15, either alone or after 16.5 microg of rIL-2 given i.p. twice a day either 1 or 3 days before. The anti-tumor activity was higher and PLX hematological toxicity not increased if orally administered PLX was given after a 3-day rIL-2 pre-treatment rather than if given alone. Lung metastasis was significantly lower and s.c. tumors were smaller in the PLX+rIL-2 group than in the PLX or rIL-2 or non-treated groups. In addition, a decrease in lung P-glycoprotein expression (investigated by Western blot analysis) was observed 1 h after the last administration of rIL-2 on day 7.
Collapse
Affiliation(s)
- Benoît Hosten
- UPRES EA 2706, University of Pharmaceutical Sciences, Paris, France
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
De S, Miller DW, Robinson DH. Effect of Particle Size of Nanospheres and Microspheres on the Cellular-Association and Cytotoxicity of Paclitaxel in 4T1 Cells. Pharm Res 2005; 22:766-75. [PMID: 15906172 DOI: 10.1007/s11095-005-2593-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2004] [Accepted: 02/04/2005] [Indexed: 10/25/2022]
Abstract
PURPOSE To compare the effect of size of delivery systems on the cell-association and in vitro cytotoxicity of paclitaxel. METHODS Four sizes of PLGA-paclitaxel particles were prepared to study the effect of particle size on the cell-association of paclitaxel in 4T1 monolayer in the presence, and absence, of BCRP inhibitor, endocytic inhibitor, and P-glycoprotein (P-gp) inhibitor. Paclitaxel cell-association studies were repeated in Caco-2, Cor-L23/R, and bovine brain microvessel endothelial cells (BBMECs), as well as the association of etoposide in 4T1 cells. Cytotoxicity of paclitaxel to 4T1 cells delivered in nanospheres was compared to microspheres. RESULTS The concentration of paclitaxel and etoposide associated with 4T1 cells was 4.8 and 29 times greater, respectively, as the size increased from 310 to 2077 nm. Paclitaxel association consistently increased in Caco-2 and Cor-L23/R as the size of the delivery system increased. The endocytic inhibitor, 2-deoxyglucose, significantly decreased the cellular paclitaxel association when delivered by nanospheres but not microspheres. Consistent with the cell-association results, paclitaxel was thrice more cytotoxic to 4T1 cells when delivered in microspheres. CONCLUSIONS Cell-association of paclitaxel increased in 4T1, Caco-2, and Cor-L23/R as particle size increased. Paclitaxel delivered from 1-mum microspheres was thrice more cytotoxic to 4T1 cells compared to the drug delivered from nanospheres or solution.
Collapse
Affiliation(s)
- Sinjan De
- College of Pharmacy, Ohio Northern University, Ada, Ohio, USA
| | | | | |
Collapse
|
12
|
Jamois C, Comets E, Mentré F, Marion S, Farinotti R, Bonhomme-Faivre L. Pharmacokinetics and neutrophil toxicity of paclitaxel orally administered in mice with recombinant interleukin-2. Cancer Chemother Pharmacol 2004; 55:61-71. [PMID: 15378273 DOI: 10.1007/s00280-004-0824-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2003] [Accepted: 03/18/2004] [Indexed: 11/30/2022]
Abstract
PURPOSE Intrinsic P-glycoprotein (P-gp) expression in the gut limits paclitaxel uptake and, thus, its bioavailability when administered orally. Interleukin-2 has been reported to be a P-gp modulator in vitro and in vivo in mice. In the work described here, the effects of interleukin-2 pretreatment on pharmacokinetics and toxicity of paclitaxel orally administered were investigated. METHODS For the pharmacokinetic study, 96 mice were allocated to two groups receiving either 10 mg/kg of paclitaxel by the oral route alone or 16.5 microg of human recombinant interleukin-2 (rIL2) by the intraperitoneal route twice daily for 3 days and then paclitaxel. Pharmacokinetic profiles were analysed first by the Bailer method, and then using a compartmental approach. For the toxicity study, 90 Swiss mice were allocated to three groups receiving paclitaxel (10 mg/kg orally), rIL2 alone (16.5 microg i.p. twice daily for 3 days, control group), or both treatments. Haematological parameters were measured and the three groups were compared using the Bailer method. A Bonferroni correction was applied to the test. RESULTS A complex absorption of paclitaxel was revealed. The Bailer method showed that the mean area under the curve (AUC) values over 0-24 h were not significantly different in the two groups, despite a trend to reduced AUC in the pretreated group. The AUC over 0-0.5 h was significantly higher in the group pretreated with rIL2, but represented only a fraction of total exposure. These results were confirmed by the compartmental analysis. The elimination rate constant remained the same across both groups. rIL2 thus increased paclitaxel absorption for the 15 min following oral intake of the drug but did not enhance the overall exposure. CONCLUSION We found that a 3-day pretreatment with rIL2 had some in vivo inhibitory effects on P-gp activity for a short period after oral dosing of paclitaxel. Those results encourage further investigation of the effect of rIL2 on the overall exposure of paclitaxel. On the other hand, it seems that the joint administration of the two drugs did not increase the risk of myelosuppression, which might be worth knowing to treat advanced cancers.
Collapse
Affiliation(s)
- Candice Jamois
- Laboratoire de Pharmacologie, Service Pharmacie, Assistance Publique des Hôpitaux de Paris-Hôpital Paul Brousse, 14 avenue Paul Vaillant Couturier, 94800, Villejuif, France
| | | | | | | | | | | |
Collapse
|
13
|
Abbara C, Rouchon C, Hosten B, Farinotti R, Bonhomme-Faivre L. ENHANCED ORAL BIOAVAILABILITY OF PACLITAXEL BY RECOMBINANT INTERLEUKIN-2 IN MICE WITH MURINE LEWIS LUNG CARCINOMA. ACTA ACUST UNITED AC 2004; 20:219-31. [PMID: 15663292 DOI: 10.1515/dmdi.2004.20.4.219] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The effect of recombinant interleukin-2 (rIL-2) pretreatment on the pharmacokinetics of paclitaxel was investigated in the murine Lewis lung carcinoma model in C57B1/6 mice. Paclitaxel 15 mg/kg was administrated orally to mice, either alone or after 3 days pretreatment with twice daily dose of 16.5 microg rIL-2. Plasma concentrations of paclitaxel were estimated by reversed phase HPLC. Pharmacokinetic parameters were determined using MicroPharm software. Using Bailer's method, a significant difference was observed in the AUCs of paclitaxel administrated alone and with rIL-2 pretreatment (928.2 +/- 136.8 vs 2549.6 +/- 131.3 ng.h.ml(-1), p <0.0001). Pretreatment with rIL-2 resulted in a 3-fold increase in the oral bioavailability of paclitaxel without altering its elimination half-life (0.798 vs 0.747 h). This could be due to the inhibition of P-glycoprotein (P-gp) mediated transport, thus enhancing paclitaxel intestinal absorption. The combination of these two drugs could be of interest in clinical practice due to their activity in pulmonary cancer.
Collapse
Affiliation(s)
- Chadi Abbara
- Laboratoire de Pharmacologie, Service de Pharmacie, Hôpital Paul Brousse, Villejuif, France
| | | | | | | | | |
Collapse
|
14
|
Belliard AM, Tardivel S, Farinotti R, Lacour B, Leroy C. Effect of hr-IL2 treatment on intestinal P-glycoprotein expression and activity in Caco-2 cells. J Pharm Pharmacol 2002; 54:1103-9. [PMID: 12195825 DOI: 10.1211/002235702320266262] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Caco-2 cells were used to investigate the effect of human recombinant interleukin-2 (IL2) on intestinal P-glycoprotein (P-gp) transporter activity in-vitro. More specifically the efflux function of P-gp was studied by measuring the transepithelial transport of rhodamine-123, a fluorescent substrate of P-gp. Its transport was completely inhibited by two specific P-gp inhibitors, ciclosporin A and GG918, in our experiments. Conversely, these two specific P-gp inhibitors inhibited only 50% of transepithelial transport when [3H]vincristine was used as substrate. After Caco-2 cells were treated with 100 IU mL-1 (6.1 ng mL-1) IL2 for 24 h, a significant diminution (21%) of P-gp transporter function was observed with rhodamine-123 substrate. This effect was also confirmed after 48 and 72 h of exposure to IL2. However, for higher concentrations of IL2 (1000 and 5000 IU mL-1), diminution of P-gp function only occurred after a longer treatment period (48 h and more). The inhibitory effect of IL2 on P-gp activity was found to be independent of tight junction function as demonstrated by constant transepithelial electrical resistance (TEER) measurements for all experimental conditions encountered in this study (time and concentration of IL2 exposure). Furthermore, the MDR1 mRNA level was found to be strongly repressed in Caco-2 cells exposed with 1000 IU mL-1 IL2 for 72 h while the amount of MRP1 mRNA remained unchanged. In conclusion, acute incubation of Caco-2 cells with IL2 induced a decrease of P-gp transporter expression and activity.
Collapse
Affiliation(s)
- Anne-Marie Belliard
- Laboratoire de Physiologie-Pharmacie Clinique, UPRES 2706, Faculté de Pharmacie, 92296 Châtenay-Malabry, France
| | | | | | | | | |
Collapse
|