culture diffusion chambers

..These results suggested that nanoemulsions are potential vehicles for improved transdermal delivery of aceclofenac...

..The luminal contents are important for development of neoinflammation following resection. Regulation of tight junctions by luminal factors has not previously been studied in Crohn's disease...

..A new mechanistic rationale is proposed whereby larger drug solutes inhibit the permeation of Aloe Vera components, but also are then able to interact more effectively with the enhancing factor and be subject to the pull effect...

..Histopathological studies on treated skin samples, gave an insight about the anatomical changes brought by the application of various enhancers. Binary mixture of menthol and ethanol in combination with square wave gave best results...

..The in vivo results show that the pharmacokinetics following transdermal iontophoretic delivery are comparable to those after oral, nasal or rectal administration, but do not match those upon subcutaneous injection...

..We have studied a possible approach for the reduction of skin irritation by patch formulations that control the rates of skin permeation and elimination of API...

..The results suggest that limonene is useful for enhancing the skin permeability of nimodipine from transdermal therapeutic systems containing HPMC gel as a reservoir...

..No particles could be detected in the lower stratum corneum or viable epidermis by electron microscopy, suggesting that minimal nanoparticle penetration occurs through the human epidermis...

..The flux of NANAOCAM prodrugs of APAP was accurately predicted by the Roberts-Sloan (RS) equation...

..These results suggest that the combination of iontophoresis with microneedle pretreatment may be a useful means to increase skin permeation of high molecular compounds...

..However, this link appears to be only part of the solution of EPA enhancement however, as even in non-viable skin ketoprofen had an enhancing affect...

..The complicated evaporation/volatilization process, which takes place when a spray is pulverized, requires better characterization before the use of supersaturation for testosterone delivery can be optimized...

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..36+/-0.21 x 10(-7) cm/s) and semisolid O/W emulsion (8.41+/-0.15 x 10(-7) cm/s) demonstrated higher values indicating a penetration enhancement. No relationship between permeation and liberation was found...

..The detector response, at 282.7 nm, was found to be linear in a concentration range between 0.145 and 145 microM. The limit of detection (LOD) was 0.019 microM and the limit of quantification (LOQ) was 0.145 microM...

..To estimate the applicability of transdermal drug permeation parameters in a finite-dose model for skin pre-treated with terpenes and to evaluate the enhancing effect of some terpene formulations on alprazolam permeation...

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..2 ma)...

..Moreover, interactions between skin and vesicles seem to depend on physico-chemical properties of the main component of the vesicular bilayer...

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..It was concluded that propylene glycol as a CPE and cosolvent in 10% (m/m) with 3% fentanyl loading in Duro-Tak 2054 showed an effective monolithic DIAP for the development of a transdermal therapeutic system for fentanyl...

..We hypothesized that DDEAC reacts with air CO2 to form a two-chain ammonium carbamate--Transkarbam 12 (T12)--which is responsible for the enhancing effect...

..CONCLUSIONS: The SCS offers an attractive tool to predict solute permeation through human skin. Moreover, as its lipid composition can be modified, they may also serve as a suitable screening model for diseased skin...

..These promising results encourage the further development of film forming polymeric solutions as novel transdermal dosage form...

..Comparative study shows that there is two fold increases in the percentage of permeation...

..To demonstrate the transdermal iontophoretic delivery of a small (12.4 kDa) protein across intact skin...

..989 (P=0.144) for M-LA, r = 0.965 (P = 0.216) for M-CA, r = 0.786 (P = 0.630) for M-SA, and r = 0.996 (P = 0.088) for M-OA...

..In conclusion, the present results suggest for the first time that formulations containing soybean extract may be a topical source of antioxidant compounds that decrease oxidative damages of the skin...

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..5%) as compared with drug solution (24.9% +/- 1.9%). The results of the characterization studies indicate that lipid perturbation along with elasticity of ethosomes vesicles seems to be the main contributor for improved skin permeation...

..The EPISKIN model has been greatly improved in the recent years and it is now possible to develop screening tests for the evaluation of skin penetration with a higher reliability...

..Each was added to the HKL solution (1%) so that the concentration of the enhancer was 1%. Among the enhancers, DP was the most effective and it enhanced the permeation of HKL approximately 5-10 times...

..To reveal the mechanisms underlying these changes, a proteomic technique combined with mass spectrometry was used. This is, to our knowledge, the first report of a laser being used to immunize intact animals...

..05). Microbiological studies of TB in microemulsion showed better anti-fungal activity against Candida albicans and Aspergillus flavus as compared to marketed product (P < 0.05)...

..These results demonstrate that the topical delivery of vitK incorporated in a lipophilic vehicle is small, but it may be enhanced by MO-based systems, which might be useful to increase the effectiveness of topical vitK therapy...

..The gels containing nanocarriers (GNM-NC, GNM-NS and GNM-NE) were able to release the drug in the viable layer of the skin, comparing to a non-particulated nimesulide-loaded formulation at the same concentration...

..Fresh rabbit ear skin demonstrated a reasonable model of human epidermis in the investigation of estradiol permeation starting from both solutions and commercial patches...

..The investigation also indicated that the barrier properties of the skin recover following the constant current iontophoresis in the presence of oleic or lauric acids...

..8 times over control gel. The powerful permeation enhancing ability of HTM with a suitable viscosity makes it promising alternative carrier for transdermal administration of drug molecule at an extremely low concentration...

..4 consistent with skin's cation permselectivity. In conclusion, this research offers a practical contribution to the development of a predictive structure-transport model of iontophoresis...

..Thus, the bioavailability of resveratrol in the epidermis appears to be enhanced upon application of the pro-molecule compared to resveratrol...

..05). In addition, the application of iontophoresis to the wet methyl cellulose-Azone formulation produced a much higher increase of sumatriptan transdermal flux...

..Our results suggests that ethosomes are an efficient carrier for dermal and transdermal delivery of MTX...

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..Due to their favorable biopharmaceutical and technological properties, longer chain 1,2-alkanediols represent a valuable class of ingredients for dermal products...

..CONCLUSIONS: The topical delivery of a model phenolic drug by its AOC prodrugs through hairless mouse skin from IPM shows the same dependence on S(IPM), S4.0, and MW as the delivery of polar heterocycles by their similar prodrugs...

..The formulation containing DPPG/ethanol as an enhancer could be a good candidate for a new topical foam, considering its good characteristics of permeability and compliance...

..The enhanced transport is most likely due to the prolonged postpulse permeable state of the skin. Electroporation at mild hyperthermia temperatures resulted in delivering much higher quantities of macromolecules...

..The model predicts a lateral strain in the skin due to preferential swelling of skin upon penetration of water. We propose that this lateral strain is responsible for the increased skin permeability at lower reservoir sizes...

..The results showed that skin disruption and inflammation did not necessarily correspond to the enhancing efficiency of the enhancers...

..Further in vitro permeation and in vivo performance studies are required...

..The results emphasize, therefore, that the new transdermal technology is suitable for therapeutic delivery of poorly penetrating molecules...

..In vivo results with this model confirmed in vitro susceptibilities of all tested antimicrobials except ciprofloxacin and should provide useful indications of the potential clinical efficacy of other new agents against anaerobes...

..salmonicida-mediated lysis of host cells may constitute a survival strategy in vivo. The co-culture of bacteria with exudate peritoneal cells may be applicable to the in vivo study of other pathogens...

..The most outstanding penetration enhancer was nerolidol, providing an almost 198-fold increase in permeability coefficient of diclofenac sodium, followed by farnesol with a 78-fold increase...

..The interpretation of fusion status is notably impaired by the use of radiopaque cages. Criteria to standardize the interpretation and evaluation of radiographic findings after PLIF are discussed...

..Moreover, the combination of PC with HECO40 improved the permeation rate (P) and shortened the lag-time (T(L))...

..4%) to three, and 8 (13.6%) to all of the basic stimuli. Cells with both inward (Na(+)) and outward (K(+)) voltage-activated currents were significantly more broadly tuned to gustatory stimuli than those with only inward currents...

..We conclude that NLS in aqueous ethanol formulations can dramatically increase skin permeability by a mechanism involving synergistic lipid-fluidization activity in the stratum corneum...

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..Therefore, this method is suitable to evaluate the energetic state in a variety of cell types, both under normal and dismetabolic conditions, such as after the induction of apoptosis or necrosis...

..Formulation and characterization of progesterone loaded hexosomes employing a novel method for oromucosal delivery...

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..Based on the results obtained, a mechanism of action for the elastic vesicles was proposed...

..This model is useful for cerebral and spinal microcirculatory analysis to investigate the platelet-endothelium interaction, the platelet aggregation and the effect of free radicals on cerebral and spinal microcirculation...

..Barrier integrity of nails was compromised after treatment with effective chemical modifiers. Thus, we have developed a suitable technique to screen nail penetration enhancers using water as a probe...

..DISCUSSION: The results did not differ for the two materials. We concluded that positive reactions observed were not caused by interaction between aluminium and thiomersal...

..These results indicate that inspiration of more than 30% oxygen causes deterioration of the microcirculation...

..Despite these positive findings, however, considerably more research is necessary to eliminate potential artefacts and to facilitate interpretation of the data...

..GA has the capacity to penetrate from the lumen into the colonic wall. The maintenance of GA integrity within the wall of the colon offers the potential for local biological activity of the drug...

..Therefore, polycarbophil-cysteine conjugates seem to be promising excipients for ocular drug delivery systems where they might be used as safe permeation enhancers...

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..Clinically, this spinal stability may serve to promote fusion. CONCLUSIONS: Coupled with the bioabsorbability of the plating material, the bioabsorbable anterior lumbar plating system is considered biomechanically advantageous...

..These data strengthen a role for newly recruited interstitial human monocytes in the immediate defence against invading pathogens...

..These results suggest that a suitably developed liposomal formulation of benzocaine can be of actual value for improving its clinical effectiveness in topical anaesthesia...

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..Our observations indicated that LRRC4 may be a negative regulator of the RPTP-zeta receptor, and contribute to suppressing the invasion ability of gliomas cells...

..It is evident that absorption into SRM and skin can occur from powdered chemicals and that surface oils or moisture are unnecessary. However, SRM proved to be a poor surrogate for dermal permeation from powders of CP and MP...

..4%, however only about 40% of 5-ALA were chemical stable after 14 days storage in the patch formulation, whereas no degradation of 5-ALA was measured in the cubic gel over 90 days of observation...

..CBD, the most polar of the three drugs, and other more polar cannabinoids will also be the focus of future drug design studies for improved transdermal delivery rates...

..The results demonstrate that iontophoresis was able to deliver an effective amount of CIC into and across the nails, and this suggests the feasibility of a constant voltage battery-powered transungual iontophoretic device...

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..We demonstrated for the first time that silver applied as nanoparticles coated with polyvinylpirrolidone is able to permeate the damaged skin in an in vitro diffusion cell system...

..This ovine model may serve as a useful tool to develop clinical osseous tissue-engineering strategies...

..Flow chamber assays are also useful for measuring bacterial adhesion under flow...

..Dermal absorption of nanocrystalline MgO and TiO(2) through human skin with intact, functional stratum corneum was not detectable under the conditions of this experiment...

..Placement of fentanyl patches in the groin region of dogs may decrease the lag time to achieve analgesia perioperatively; however, in vivo studies are necessary to confirm these findings...

..In conclusion, the present observation disclose that the excessive formation of 1,25(OH)(2)D(3) in Klotho-deficient mice results in extracellular volume depletion, which significantly contributes to the shortening of life span...

..LEGO bricks are inexpensive, fast and suitable for current diagnostic activity or for research investigations in every laboratory...

..In this study the effect of various buccal permeation enhancers on PACAP and FD-4 was evaluated...

..Therefore, from the absence of internal exposure we conclude that their use in sunscreens does not pose a health risk...

..Dithranol adsorbed on hydrophilic silica aerogels exhibited superior penetration behaviour compared to that of the standard ointment (dithranol in white soft paraffin)...

..05). The antifungal activity of fluconazole showed the widest zone of inhibition with gel microemulsion. The gel microemulsion is an excellent vehicle for fluconazole topical drug delivery...

..The tissue clamp sealed the preparation effectively against leakage of macromolecules. CONCLUSION: The new chamber device forms a reliable tool for in vitro drug penetration and toxicity studies in isolated perfused corneoscleral tissue...

..This study provided evidence that anti-GM1 antibody, frequently detected in sera from patients with inflammatory neuropathies, may participate BNB dysfunction and contribute to development of neuropathy...

..We may hope that this immunoisolating technique will establish prolonged survival of allo- or xenografted tissue without immunosuppressive treatment...

..The results indicate that leakage of strict anaerobes may be evaluated in a two-chamber system...

..75 ( +/- 0.16) x 10(-7) cm(2) s(-1) and ATR-FTIR, D = 1.42 ( +/- 0.26) x 10(-7) cm(2) s(-1)). In addition to the characterization of LAP permeation, ATR-FTIR spectroscopy enabled an examination of solvent transport across the membrane...

..Based on this model, he will devise protocols to modify and possibly reverse the secretory/absorptive properties of the tissue. ..

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..These aims will extend recent original findings of this laboratory. From the accomplishment of these aims, models of lens and corneal physiological function will be provided. ..

..This research will elucidate important mechanisms of particle-induced, chemokine-directed cell trafficking and suggest new treatment strategies. ..

..abstract_text> ..

..abstract_text> ..

..NEI funds are requested for 4 of the 7 modules. Our Vision Research Center has facilities with an area of more than 15,000 sq. ft. organized as individual laboratories and common space where modules operate. ..

..These studies may provide the groundwork for the design of future treatment modalities for dry-eye syndromes. ..

..This project is expected to define targets for pharmacologic intervention in steroid-induced glaucoma and provide knowledge that can potentially be used to understand and treat primary open angle glaucoma as well. ..

..This research will elucidate important mechanisms of particle-induced, chemokine-directed cell trafficking and suggest new treatment strategies. ..

..Such information is important, because the mechanisms by which the lens maintains its clarity remain obscure, and cataract remains a major cause of blindness worldwide. ..

..The results of this project will yield new information concerning hormonal modulation of cardiac pHi control systems and the action of intracellular and intercellular H+ diffusion to dissipate regional pHi gradients. ..

..abstract_text> ..

..Further we also plan to correlate the time course of unbound ciprofloxacin in dermal ECF with that in synovial fluid determined by microdialysis in rat. ..

..The results should also yield new information, obtained under physiologically realistic conditions, concerning the pH1- contraction relationship in ventricular muscle...

..The results should provide useful new insight concerning the ionic basis of ventricular pHi control...

..abstract_text> ..

..Similar plots calculated from the primary structure of lens MIP26 suggest six membrane spanning domains. Cryo-electron microscopy and computer image processing will be utilized to experimentally test these predictions...

..The knowledge generated by these studies will unravel the roles of estrogen in the regulation of arteriolar function related specifically to the involvement of EDHF-mediated dilator pathways in adaptation to NO deficiency. ..

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..The inconclusive and contradictory data from human and animal studies render the proposed studies highly significant. ..

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..These delivery techniques should be safer and more effective than the state of the art. Ultimately, these results will guide us in enhancing drug treatments in ophthalmic practice. ..

..The role of HSP72 expression in protection will be tested by examining the effects of antisense pretreatment on HSP72 expression and the same three measures of ischemic damage. ..

..In addition, the program successfully attracts minority trainees to careers in fundamental eye research, drawing on the outstanding resources of Atlanta academic and medical institutions. ..

..To study their functional properties, expression in Xenopus laevis oocytes will be used to allow measurements of molecular properties, electrolyte and nonelectrolyte fluxes and water permeability. ..

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..Correlation of our in vitro data with the in vivo models will aid in the creation of a reliable QSPR database, as well as help to identify the most promising prodrug for eventual human use. ..

..He is applying for the NIDCR Scholar Development and Faculty Transition Award to pursue scientific career as an independent investigator at Boston University School of Dental Medicine. ..

..Correlation of the in vitro data with the in vivo model will aid in the creation of a reliable QSAR database that is necessary to help identify the best co-drugs for clinical use. ..

..We also propose to study the distribution and interaction of connexin and aquaporin channels in the native fiber environment and in the Xenopus oocyte expression system. ..

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