1
|
Niu Z, Tedesco E, Benetti F, Mabondzo A, Montagner IM, Marigo I, Gonzalez-Touceda D, Tovar S, Diéguez C, Santander-Ortega MJ, Alonso MJ. Rational design of polyarginine nanocapsules intended to help peptides overcoming intestinal barriers. J Control Release 2017; 263:4-17. [PMID: 28235590 DOI: 10.1016/j.jconrel.2017.02.024] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 02/02/2017] [Accepted: 02/19/2017] [Indexed: 02/04/2023]
Abstract
The aim of this work was to rationally design and characterize nanocapsules (NCs) composed of an oily core and a polyarginine (PARG) shell, intended for oral peptide delivery. The cationic polyaminoacid, PARG, and the oily core components were selected based on their penetration enhancing properties. Insulin was adopted as a model peptide to assess the performance of the NCs. After screening numerous formulation variables, including different oils and surfactants, we defined a composition consisting of oleic acid, sodium deoxycholate (SDC) and Span 80. This selected NCs composition, produced by the solvent displacement technique, exhibited the following key features: (i) an average size of 180nm and a low polydispersity (0.1), (ii) a high insulin association efficacy (80-90% AE), (iii) a good colloidal stability upon incubation in simulated intestinal fluids (SIF, FaSSIF-V2, FeSSIF-V2), and (iv) the capacity to control the release of the associated insulin for >4h. Furthermore, using the Caco-2 model cell line, PARG nanocapsules were able to interact with the enterocytes, and reversibly modify the TEER of the monolayer. Both cell adhesion and membrane permeabilization could account for the pronounced transport of the NCs-associated insulin (3.54%). This improved interaction was also visualized by confocal fluorescent microscopy following oral administration of PARG nanocapsulesto mice. Finally, in vivo efficacy studies performed in normoglycemic rats showed a significant decrease in their plasma glucose levels after treatment. In conclusion, here we disclose key formulation elements for making possible the oral administration of peptides.
Collapse
Affiliation(s)
- Zhigao Niu
- Department of Pharmacy and Pharmaceutical Technology, CIMUS Research Institute, IDIS research Institute, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Erik Tedesco
- ECSIN-European Center for the Sustainable Impact of Nanotechnology, ECAMRICERT SRL, I-45100 Rovigo, Italy
| | - Federico Benetti
- ECSIN-European Center for the Sustainable Impact of Nanotechnology, ECAMRICERT SRL, I-45100 Rovigo, Italy
| | - Aloïse Mabondzo
- Service de Pharmacologie et d'Immunoanalyse, IBITECS, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | | | - Ilaria Marigo
- Veneto Institute of Oncology, IOV-IRCCS, 35128 Padova, Italy
| | - David Gonzalez-Touceda
- Biomedical Research Group, Center for Research in Molecular Medicine and Chronic Diseases, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Sulay Tovar
- Biomedical Research Group, Center for Research in Molecular Medicine and Chronic Diseases, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Carlos Diéguez
- Biomedical Research Group, Center for Research in Molecular Medicine and Chronic Diseases, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Manuel J Santander-Ortega
- Department of Pharmacy and Pharmaceutical Technology, CIMUS Research Institute, IDIS research Institute, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain; Cellular Neurobiology and Molecular Chemistry of the Central Nervous System Group, Universidad de Castilla-La Mancha, Spain
| | - María J Alonso
- Department of Pharmacy and Pharmaceutical Technology, CIMUS Research Institute, IDIS research Institute, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| |
Collapse
|
2
|
Ghadiri M, Young PM, Jarolimek W, Grau GER, Oliver BGG, Traini D. The effect of non-specific tight junction modulators on the transepithelial transport of poorly permeable drugs across airway epithelial cells. J Drug Target 2016; 25:342-349. [DOI: 10.1080/1061186x.2016.1258703] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Maliheh Ghadiri
- Department of Respiratory Technology, Woolcock Institute of Medical Research and Discipline of Pharmacology, Sydney Medical School, Glebe, Australia
| | - Paul M. Young
- Department of Respiratory Technology, Woolcock Institute of Medical Research and Discipline of Pharmacology, Sydney Medical School, Glebe, Australia
| | | | - Georges E. R. Grau
- Vascular Immunology Unit, Sydney Medical School & Bosch Institute, University of Sydney, Camperdown, Australia
| | - Brian G. G. Oliver
- Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, The University of Sydney and School of Life Sciences, University of Technology, Sydney, Australia
| | - Daniela Traini
- Department of Respiratory Technology, Woolcock Institute of Medical Research and Discipline of Pharmacology, Sydney Medical School, Glebe, Australia
| |
Collapse
|
3
|
Sravanthi V, Preethi Pallavi M, Bonam SR, Sathyabama S, Sampath Kumar HM. Oleic acid nanoemulsion for nasal vaccination: Impact on adjuvanticity based immune response. J Drug Deliv Sci Technol 2015. [DOI: 10.1016/j.jddst.2015.05.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
4
|
|
5
|
Deli MA. Potential use of tight junction modulators to reversibly open membranous barriers and improve drug delivery. Biochimica et Biophysica Acta (BBA) - Biomembranes 2009; 1788:892-910. [DOI: 10.1016/j.bbamem.2008.09.016] [Citation(s) in RCA: 291] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2008] [Revised: 09/19/2008] [Accepted: 09/22/2008] [Indexed: 02/06/2023]
|
6
|
Hamahata A, Enkhbaatar P, Kraft ER, Lange M, Leonard SW, Traber MG, Cox RA, Schmalstieg FC, Hawkins HK, Whorton EB, Horvath EM, Szabo C, Traber LD, Herndon DN, Traber DL. gamma-Tocopherol nebulization by a lipid aerosolization device improves pulmonary function in sheep with burn and smoke inhalation injury. Free Radic Biol Med 2008; 45:425-33. [PMID: 18503777 PMCID: PMC2555991 DOI: 10.1016/j.freeradbiomed.2008.04.037] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [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: 11/29/2007] [Revised: 04/17/2008] [Accepted: 04/18/2008] [Indexed: 11/22/2022]
Abstract
Fire accident victims who sustain both thermal injury to skin and smoke inhalation have gross evidence of systemic and pulmonary oxidant damage and acute lung injury. We hypothesized that gamma-tocopherol (gT), a reactive O(2) and N(2) scavenger, when delivered into the airway, would attenuate lung injury induced by burn and smoke inhalation. Acute lung injury was induced in chronically prepared, anesthetized sheep by 40% total burn surface area, third-degree skin burn and smoke insufflation (48 breaths of cotton smoke, <40 degrees C). The study groups were: (1) Sham (not injured, flaxseed oil (FO)-nebulized, n=6); (2) SA-neb (injured, saline-nebulized, n=6); (3) FO-neb (injured, FO-nebulized, n=6); and (4) gT+FO-neb (injured, gT and FO-nebulized, n=6). Nebulization was started 1 h postinjury, and 24 ml of FO with or without gT (51 mg/ml) was delivered into airways over 47 h using our newly developed lipid aerosolization device (droplet size: 2.5-5 microm). The burn- and smoke inhalation-induced pathological changes seen in the saline group were attenuated by FO nebulization; gT addition further improved pulmonary function. Pulmonary gT delivery along with a FO source may be a novel effective treatment strategy in management of patients with acute lung injury.
Collapse
Affiliation(s)
| | | | - Edward R. Kraft
- University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Matthias Lange
- University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Scott W. Leonard
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331, USA
| | - Maret G. Traber
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331, USA
| | - Robert A. Cox
- University of Texas Medical Branch, Galveston, TX 77555, USA
| | | | - Hal K. Hawkins
- University of Texas Medical Branch, Galveston, TX 77555, USA
| | | | | | - Csaba Szabo
- University of Medicine and Dentistry of New Jersey, Newark, NJ, USA
| | | | | | - Daniel L. Traber
- University of Texas Medical Branch, Galveston, TX 77555, USA
- * Corresponding author. Fax: +(409) 772-6409., E-mail address: (D.L. Traber)
| |
Collapse
|
7
|
Dai WG, Dong LC. Characterization of physiochemical and biological properties of an insulin/lauryl sulfate complex formed by hydrophobic ion pairing. Int J Pharm 2007; 336:58-66. [PMID: 17174492 DOI: 10.1016/j.ijpharm.2006.11.035] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [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: 04/05/2006] [Revised: 08/16/2006] [Accepted: 11/09/2006] [Indexed: 10/23/2022]
Abstract
An insulin/lauryl sulfate complex was prepared by hydrophobic ion pairing (HIP). The physiochemical and biological properties of the HIP complex were characterized using octanol/water partition measurement, isothermal titration calorimetry (ITC), ultraviolet-circular dichroism (UV-CD) and Fourier transform infrared spectroscopy (FTIR). Sodium dodecyl sulfate (SDS) bound to the insulin in a stoichiometric manner. The formed complex exhibited lipophilicity, and its insulin retained its native structure integrity. The in vivo bioactivity of the complex insulin was evaluated in rats by monitoring the plasma glucose level after intravenous (i.v.) injection, and the glucose level was compared with that for free insulin. The pharmacodynamic study result in rats showed that the complex insulin had in vivo bioactivity comparable to free insulin.
Collapse
Affiliation(s)
- Wei-Guo Dai
- ALZA Corporation, 1900 Charleston Road, Mountain View, CA 94039, USA.
| | | |
Collapse
|
8
|
Zheng JY, Fulu MY. Decrease of genital organ weights and plasma testosterone levels in rats following oral administration of leuprolide microemulsion. Int J Pharm 2006; 307:209-15. [PMID: 16300912 DOI: 10.1016/j.ijpharm.2005.10.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [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: 01/31/2005] [Revised: 05/27/2005] [Accepted: 10/05/2005] [Indexed: 10/25/2022]
Abstract
Studies were conducted to develop oral leuprolide microemulsions using oleic acid as an absorption enhancer and to evaluate its absorption and pharmacological responses in rats. Oral administration of leuprolide microemulsion at a dose of 3 mg/kg showed a greater in vivo exposure level (C(max) and AUC) than its saline solution. When male rats were orally given a microemulsion formulation of leuprolide acetate at 0.25, 0.5, and 1mg/day for 14 consecutive days, a significant decrease in testis, prostate and seminal vesicle weights was observed. In a 35-day study, the reduction of the male genital organ weights by once a day treatment (2 mg/rat, qd) was similar to that by twice a day treatment (1 mg/rat, bid) at the same dose level. From both 14- and 35-day studies, plasma testosterone levels were sharply increased at the beginning of the treatment, and then significantly decreased to below normal control level which was also maintained during the treatment. In female rats, similar reduction of uterus and ovary weights was obtained following oral administration of leuprolide microemulsion for 35 days. These antagonistic activities from oral leuprolide microemulsion were similar to a single subcutaneous injection of Lupron depot (3.75 mg/rat), a commercial leuprolide product. The results indicated that leuprolide absorbed into systemic blood circulation from the oral microemulsion containing oleic acid reached the plasma level which can exert its pharmacological effects. Increasing oral absorption of leuprolide observed in this study could be mediated by improved membrane permeation from oleic acid and reduced enzymatic degradation from microemulsions. These findings suggest that systemic absorption of highly water-soluble protein or peptide drugs could be enhanced by oral microemulsions containing oleic acid.
Collapse
MESH Headings
- Administration, Oral
- Animals
- Antineoplastic Agents, Hormonal/administration & dosage
- Antineoplastic Agents, Hormonal/pharmacology
- Chemistry, Pharmaceutical
- Delayed-Action Preparations
- Dose-Response Relationship, Drug
- Emulsions
- Female
- Genitalia, Female/drug effects
- Genitalia, Female/pathology
- Genitalia, Male/drug effects
- Genitalia, Male/pathology
- Intestinal Absorption/drug effects
- Leuprolide/administration & dosage
- Leuprolide/blood
- Leuprolide/pharmacology
- Male
- Oleic Acid/administration & dosage
- Oleic Acid/pharmacology
- Organ Size/drug effects
- Ovary/drug effects
- Ovary/pathology
- Prostate/drug effects
- Prostate/pathology
- Rats
- Rats, Sprague-Dawley
- Seminal Vesicles/drug effects
- Seminal Vesicles/pathology
- Testis/drug effects
- Testis/pathology
- Testosterone/blood
- Uterus/drug effects
- Uterus/pathology
Collapse
Affiliation(s)
- Jack Y Zheng
- Global Pharmaceutical R&D, Formulation Development Center, Abbott Laboratories, North Chicago, IL 60064-6246, USA.
| | | |
Collapse
|
9
|
|
10
|
Morita H, Katsuno T, Hoshimoto A, Hirano N, Saito Y, Suzuki Y. Connexin 26-mediated gap junctional intercellular communication suppresses paracellular permeability of human intestinal epithelial cell monolayers. Exp Cell Res 2004; 298:1-8. [PMID: 15242756 DOI: 10.1016/j.yexcr.2004.03.046] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [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: 11/10/2003] [Revised: 03/16/2004] [Indexed: 12/19/2022]
Abstract
In some cell types, gap junctional intercellular communication (GJIC) is associated with tight junctions. The present study was performed to determine the roles of GJIC in regulation of the barrier function of tight junctions. Caco-2 human colonic cells were used as a monolayer model, and barrier function was monitored by measuring mannitol permeability and transepithelial electrical resistance (TER). The monolayers were chemically disrupted by treatment with oleic acid and taurocholic acid. Western blotting analyses were performed to evaluate the protein levels of connexins, which are components of gap junctional intercellular channels. Cx26 expression was detected in preconfluent Caco-2 cells, and its level increased gradually after the monolayer reached confluency. These results prompted us to examine whether overexpression of Cx26 affects barrier function. Monolayers of Caco-2 cells stably expressing Cx26 showed significantly lower mannitol permeability and higher TER than mock transfectants when the monolayers were chemically disrupted. The levels of claudin-4, an important component of tight junctions, were significantly increased in the stable Cx26 transfectant. These results suggest that Cx26-mediated GJIC may play a crucial role in enhancing the barrier function of Caco-2 cell monolayers.
Collapse
Affiliation(s)
- Hidekazu Morita
- Clinical Cell Biology (F5), Graduate School of Medicine, Chiba University, 260-8670, Chuo-Ward, Japan
| | | | | | | | | | | |
Collapse
|
11
|
Abstract
Myocardial ischemia-reperfusion activates the Na(+)/H(+) exchanger, which induces arrhythmias, cell damage, and eventually cell death. Inhibition of the exchanger reduces cell damage and lowers the incidence of arrhythmias after ischemia-reperfusion. The omega-3 polyunsaturated fatty acids (PUFAs) are also known to be cardioprotective and antiarrhythmic during ischemia-reperfusion challenge. Some of the action of PUFAs may occur via inhibition of the Na(+)/H(+) exchanger. The purpose of our study was to determine the capacity for selected PUFAs to alter cardiac sarcolemmal (SL) Na(+)/H(+) exchange. Cardiac membranes highly enriched in SL vesicles were exposed to 10-100 microM eicosapentanoic acid (EPA) or docosahexanoic acid (DHA). H(+)-dependent (22)Na(+) uptake was inhibited by 30-50% after treatment with > or =50 microM EPA or > or =25 microM DHA. This was a specific effect of these PUFAs, because 50 microM linoleic acid or linolenic acid had no significant effect on Na(+)/H(+) exchange. The SL vesicles did not exhibit an increase in passive Na(+) efflux after PUFA treatment. In conclusion, EPA and DHA can potently inhibit cardiac SL Na(+)/H(+) exchange at physiologically relevant concentrations. This may explain, in part, their known cardioprotective effects and antiarrhythmic actions during ischemia-reperfusion.
Collapse
Affiliation(s)
- Danny P Goel
- Cell Biology Laboratory, Division of Stroke and Vascular Disease, St. Boniface General Hospital Research Centre, Winnipeg, Manitoba R2H 2A6, Canada
| | | | | |
Collapse
|
12
|
Kawano K, Nakamura K, Hayashi K, Nagai T, Takayama K, Maitani Y. Liver targeting liposomes containing beta-sitosterol glucoside with regard to penetration-enhancing effect on HepG2 cells. Biol Pharm Bull 2002; 25:766-70. [PMID: 12081144 DOI: 10.1248/bpb.25.766] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this study was to examine the interaction of soybean-derived sterylglucoside (SG) with the human hepatoblastoma cell line HepG2 with regard to the penetration-enhancing effect of beta-sitosterol glucoside (Sit-G) to clarify the accumulation of SG-containing liposomes (SG-liposomes) to the liver in vivo. The approach was based on measurement of the association of SG-liposomes labeled with 1,1'-dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate (Dil) in terms of asialoglycoprotein receptor (ASGP-R)-mediated endocytosis, affinity of Sit-G using lAsys and the association of FITC-dextran 4400 (FD-4) increased by Sit-G with the cells. The association of SG-liposomes was decreased by addition of asialofetuin, suggesting that SG-liposomes might be taken up via ASGP-R. Sit-G showed higher affinity with HepG2 cells than HeLa cells, and enhanced the association of FD-4 depending on the incubation time and Sit-G concentrations. Significant positive correlations were found between Sit-G and FD-4 association with the cells, indicating that Sit-G enhanced the drug penetration by distribution in cell membranes. The high degree of liver association of SG-liposomes in vivo might be related to recognition of glucose residues of SG by ASGP-R and to the high affinity and penetration-enhancing effect of Sit-G with hepatocytes.
Collapse
Affiliation(s)
- Kumi Kawano
- Institute of Medicinal Chemistry, Hoshi University, Tokyo, Japan
| | | | | | | | | | | |
Collapse
|
13
|
Maitani Y, Nakamura K, Suenaga H, Kamata K, Takayama K, Nagai T. The enhancing effect of soybean-derived sterylglucoside and beta-sitosterol beta-D-glucoside on nasal absorption in rabbits. Int J Pharm 2000; 200:17-26. [PMID: 10845682 DOI: 10.1016/s0378-5173(99)00470-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of this study was to elucidate the efficiency of soybean-derived sterylglucoside (SG) and its main component beta-sitosterol beta-D-glucoside (Sit-G), as nasal absorption enhancers. Nasal administration of verapamil with SG and Sit-G showed the higher bioavailabilities (60.4 and 90.7%, respectively) than that with lactose (39.8%). It was clear that SG and Sit-G promoted the absorption of verapamil through nasal mucosa. To elucidate the mechanism, we measured the calcein leakage from liposomes by incubation with SG, Sit-G, oleic acid, soybean-derived sterol, and beta-sitosterol to investigate transcellular absorption and measured the changes in intracellular Ca2+ concentrations ([Ca2+]i) by Sit-G to analyze paracellular absorption. The large amount of calcein leakage induced by enhancers was consistent with an enhancement of bioavailability of verapamil and insulin following nasal administration (oleic acid < SG < Sit-G). Moreover, Sit-G increased [Ca2+]i in the medium containing Ca2+, but not in Ca2+ free medium. This result suggested that Sit-G increases the fluidity of the mucosal membrane and facilitates Ca2+ influx from extracellular sources. In conclusion, a possible explanation for SG and Sit-G to promote drug absorption, is that they may affect both paracellular pathway and transcellular pathways caused by pertubation of lipid.
Collapse
Affiliation(s)
- Y Maitani
- Department of Pharmaceutics, Hoshi University, Shinagawa, Tokyo, Japan.
| | | | | | | | | | | |
Collapse
|
14
|
Park HS, Lee SY, Kim YH, Kim JY, Lee SJ, Choi M. Membrane perturbation by mastoparan 7 elicits a broad alteration in lipid composition of L1210 cells. Biochim Biophys Acta 2000; 1484:151-62. [PMID: 10760465 DOI: 10.1016/s1388-1981(00)00002-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Mastoparan 7 (Mas-7), an amphiphilic peptide possessing membrane perturbing activity, has been known to selectively stimulate some lipases. To examine changes in the lipid composition induced by Mas-7, we carried out systemic lipid analysis of L1210 cells after Mas-7 treatment. The total lipid was determined by HPLC, gas-liquid chromatography, and electrospray ionization mass spectrometry in conjunction with differential radiolabelling with [(32)P]orthophosphate, [(3)H]myristic acid, and [(3)H]arachidonic acid. The lipid analysis revealed multiple changes in more than 10 lipid classes. Free fatty acids (FFAs) and phosphatidylethanol (PEt), the phospholipase D product in the presence of ethanol, were increased significantly and phosphatidylcholine (PC) was decreased. Digitonin, a membrane permeabilizing reagent, similarly affected the lipid composition of L1210. The FFA released showed a very broad distribution of saturated, monounsaturated, and polyunsaturated fatty acids, implying that phospholipase A(2) alone could not account for all of the FFAs released. By comparing the molecular species of PEt with those of endogenous PC, we showed that phospholipase D in L1210 cells appeared to act selectively on diacyl-PC. The perturbation-induced alterations in the lipid composition brought about by Mas-7 might play a crucial role in the physiology of the affected cells.
Collapse
Affiliation(s)
- H S Park
- Department of Chemistry and Center for Molecular Catalysis, Seoul National University, Seoul, South Korea
| | | | | | | | | | | |
Collapse
|
15
|
Barichello JM, Morishita M, Takayama K, Chiba Y, Tokiwa S, Nagai T. Enhanced rectal absorption of insulin-loaded Pluronic F-127 gels containing unsaturated fatty acids. Int J Pharm 1999; 183:125-32. [PMID: 10361163 DOI: 10.1016/s0378-5173(99)00090-3] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The objective of this study was to prepare and to evaluate Pluronic F-127 (PF127) gel containing unsaturated fatty acids such as oleic acid (18:1), eicosapentaenoic acid (20:5) and docosahexaenoic acid (22:6) as a potential formulation for rectal delivery of insulin. The hypoglycemic effect of insulin was examined following rectal administration of the various formulations in normal rats. Rectal insulin absorption was markedly enhanced, and marked hypoglycemia was induced by all PF127 gels (insulin dose, 5 U/kg) containing different unsaturated fatty acids. PF127 gels containing unsaturated fatty acids presented low tmax mean values indicating that the absorption of insulin occurred very rapidly in the rectum. The relative hypoglycemic efficacy of PF127 gel formulations containing fatty acids such as oleic acid, eicosapentaenoic (EPA) and docosahexaenoic (DHA) were 28.4+/-8.1, 26.8+/-14.3 and 23.1+/-5.7%, respectively. The finding demonstrated that 20% PF127 gels containing unsaturated fatty acids are potential formulations for rectal delivery of insulin.
Collapse
Affiliation(s)
- J M Barichello
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Hoshi University, Ebara-2-4-41, Shinagawa-Ku, Tokyo 142-8501, Japan
| | | | | | | | | | | |
Collapse
|
16
|
Evans JP, Tudball N, Dickinson PA, Farr SJ, Kellaway IW. Transport of a series of D-phenylalanine-glycine hexapeptides across rat alveolar epithelia in vitro. J Drug Target 1999; 6:251-9. [PMID: 9894693 DOI: 10.3109/10611869808996833] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The effect of lipophilicity on the absorption of peptides from the lungs was investigated. D-phenylalanine (F)-glycine (G) hexapeptides were synthesised to differ, predominantly, only in their lipophilicity. Rat alveolar type II cells were isolated and cultured on plastic, or polycarbonate filters; by day 6 they had de-differentiated to an alveolar type I-like epithelium. The permeability of the monolayers to the hexapeptides was determined. The hexapeptides were metabolically and chemically stable for greater than 24h in the presence of the cells. They did not adhere to the cell culture plastic and were associated only to a low extent with the cell monolayer. The apical to basolateral permeability coefficients for D-F1G5, D-F2G4, and D-F3G3 were 2.19+/-0.53, 1.75+/-0.42 and 2.20+/-0.56 x 10(-7) cm s(-1) respectively. The permeability of the monolayers to D-F1G5 and D-F2G4 was concentration and direction independent, however for D-F3G3 the monolayer was more permeable in the basolateral to apical direction. There was no correlation between the lipophilicity of the hexapeptides and permeability coefficients: other physicochemical parameters did not predict hexapeptide transport. Lipophilicity does not appear to control the transport of hexapeptides across the alveolar epithelium probably as a consequence of the peptides being transported via the paracellular route.
Collapse
Affiliation(s)
- J P Evans
- Welsh School of Pharmacy, University of Wales, Cathays Park, Cardiff, UK
| | | | | | | | | |
Collapse
|
17
|
Morishita M, Matsuzawa A, Takayama K, Isowa K, Nagai T. Improving insulin enteral absorption using water-in-oil-in-water emulsion. Int J Pharm 1998; 172:189-98. [DOI: 10.1016/s0378-5173(98)00210-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
18
|
Suzuki A, Morishita M, Kajita M, Takayama K, Isowa K, Chiba Y, Tokiwa S, Nagai T. Enhanced colonic and rectal absorption of insulin using a multiple emulsion containing eicosapentaenoic acid and docosahexaenoic acid. J Pharm Sci 1998; 87:1196-202. [PMID: 9758676 DOI: 10.1021/js980125q] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The aim of this study was to test the effects of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on insulin absorption from rat intestinal loops in situ, using a water-in-oil-in-water (W/O/W) multiple emulsion. The enhancement effect of these long-chain polyunsaturated fatty acids was compared with that of free fatty acids having a C18 alkyl chain. The emulsion (insulin dose, 50 units/kg) was administered directly into the colonic and rectal loops. Both EPA and DHA strongly enhanced insulin absorption and induced hypoglycemia after colonic and rectal dosing. Comparing the pharmacological availability, the order of effectiveness with respect to the enhanced absorption of insulin was DHA >/= EPA > C18 unsaturated fatty acids >> C18 saturated fatty acid at both sites. DHA showed greater effects upon rectal dosing than upon colonic dosing. Histological studies revealed that the emulsion incorporating DHA did not induce gross morphological changes in the structure of the intestinal mucosa. Our results indicate that a W/O/W multiple emulsion incorporating DHA is a possible means of facilitating the intestinal absorption of insulin without inducing any serious damage to the epithelial cells.
Collapse
Affiliation(s)
- A Suzuki
- Takasaki Research Laboratories, Smithkline Beecham Seiyaku K.K., Oyagi-machi 168, Takasaki-shi, Gunma 370-0072, Japan
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Gao S, Singh J. Effect of oleic acid/ethanol and oleic acid/propylene glycol on the in vitro percutaneous absorption of 5-fluorouracil and tamoxifen and the macroscopic barrier property of porcine epidermis. Int J Pharm 1998; 165:45-55. [DOI: 10.1016/s0378-5173(97)00430-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
20
|
|
21
|
Dickinson PA, Evans JP, Farr SJ, Kellaway IW, Appelqvist TP, Hann AC, Richards RJ. Putrescine uptake by alveolar epithelial cell monolayers exhibiting differing transepithelial electrical resistances. J Pharm Sci 1996; 85:1112-6. [PMID: 8897281 DOI: 10.1021/js9504898] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Rat alveolar type II cells were isolated following elastase digestion and cultured on polycarbonate filters at various densities and in different media. Two days after seeding, the cells formed a monolayer on the filters which consisted predominantly of type II cells, these then de-differentiated to a alveolar type I-like cell monolayer by day 6. The seeding density and media utilized affected the transepithelial electrical resistance (TEER) generated by the monolayer. Only certain culture conditions allowed the production of a monolayer that mimics, putatively, the in vivo alveolar epithelium (TEER greater than 1000 omega cm2). Vmax and K(m) values for the uptake of putrescine by monolayers exhibiting low and high TEERs on day 6 were determined. The capacity of the putrescine uptake mechanisms was greater in cell monolayers exhibiting a high TEER than those exhibiting a low TEER, suggesting that the TEER does not only measure the "tightness" of the monolayer but contains an element representative of the viability of the cell monolayer. The selection of appropriate TEERs for cell culture investigations is discussed.
Collapse
|
22
|
|
23
|
|
24
|
Abstract
PURPOSE To evaluate the effects of absorption enhancers in dry powders and in liquids, pulmonary absorption of salmon calcitonin (sCT) in various formulations was measured. METHODS The dry powder of sCT was prepared by a freeze-drying method with a jet mill. After intratracheal administration of sCT dry powder and liquid (solution) preparations to rats, plasma sCT levels and calcium levels were measured. RESULTS After intratracheal administration without absorption enhancers, sCT in the dry powder and in the liquid were absorbed nearly to the same degree. Absorption enhancers (oleic acid, lecithin, citric acid, taurocholic acid, dimethyl-beta-cyclodextrin, octyl-beta-D-glucoside) were much more effective in the dry powder than in the solution. The reason may be that the enhancers added to the dry powder dissolved at high concentrations in a trace volume of the fluid lining the alveolar epithelium. CONCLUSIONS The present results suggest that the pulmonary absorption of peptides and proteins can be greatly improved by formulating them into dry powders with smaller amounts of enhancers than in liquid dosage forms.
Collapse
Affiliation(s)
- S Kobayashi
- Pharma Research and Development Division, Hoechst Japan Limited, Saitama, Japan
| | | | | |
Collapse
|