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2013 e83 PP208—Deoxycholic AciD As A MoDifier of the BlooD BrAin BArrier PerMeAtion in rAt M. Lalic-Popovic; S. Golocorbin-Kon; V. Vasovic; B. Milijasevic; and M. Mikov Department of Pharmacy, Faculty of Medicine, Novi Sad, Serbia; Faculty of Pharmacy, University of Montenegro, Podgorica, Montenegro; and Department of Pharmacology, Toxicology and Clinical Pharmacology, Faculty of Medicine, Novi Sad, Serbia Introduction: Major problem for diabetic patients represents damage of blood vessels and the oxidative stress of the brain cells due to increased concentration of free radicals and poor nutrition of brain cells. Gliclazide has antioxidative properties and poor blood brain barrier (BBB) penetration. Bile acids are known for their hypoglycemic effect and as prooters of drug penetration across biological membranes. Aim: The aim of this study is to investigate whether the bile acid (deoxycholic acid) can change the permeation of gliclazide, through the blood brain barrier of a rat model type-1 diabetes. Patients (or Materials) and Methods: Twenty-four male Wistar rats were randomly allocated to 4 groups, of which 2 were given alloxan intraperitoneally (100 mg/kg) to induce diabetes. One diabetic group and 1 healthy group were given a bolus gliclazide intra-arterially (20 mg/kg), while the other 2 groups apart from gliclazide got deoxycholic acid (4 mg/kg) subcutaneously. Blood samples were collected 30, 60, 150, and 240 seconds after dose, brain tissues were immediately excised, and blood glucose and gliclazide concentrations were measured. Results: Penetration of gliclazide in groups without deoxycholic acid pretreatment was increased in diabetic animals compared with healthy animals. Also in both, healthy and diabetic animals, deoxycholic acid increased the permeation of gliclazide through that in BBB. Deoxycholic acid pretreatment also changed the pattern of blood glucose level increase after gliclazide application in diabetic as well as in healthy animals. Conclusion: Deoxycholic acid promotes gliclazide penetration across BBB in diabetic and in healthy animals. In addition, deoxycholic acid alters some pharmacokinetic properties of gliclazide in both healthy and diabetic rats. Thus, deoxycholic acid should be more investigated in the treatment of diabetes mellitus and as permeation promoter of lipophilic molecules through BBB as well as other biological membranes. Financial Source: This work has been supported by Ministry of Science and Technology development of Serbia N041012.

Background Cardiovascular diseases are the most frequent cause of morbidity and mortality in many countries. That explains why medications for the treatment of cardiovascular diseases are the group of drugs with the largest consumption, and ACE inhibitors take a large part in this consumption. The aim of this study was to analyze the consumption of ACE inhibitors in Serbia in 2010 compared with Norway, a country with a developed pharmacotherapeutic practice.

Background Serbia is one of the leading countries in the world with respect to mortality from cardiovascular diseases. Drugs that reduce serum lipids belong to the group of drugs that can significantly lower complications of cardiovascular diseases and their utilization in Serbia deserves special attention. The aim of this study was to measure the consumption of serum lipid reducing drugs in Serbia from 2004 to 2010, to compare these data with those from Scandinavian countries, and to compare the consumption of lipid-lowering drugs and the rate of mortality from cardiovascular diseases in these countries.

Background Silymarin, an extract of Silybum marianum seeds, possesses a broad spectrum of action: antifibrotic, antiinflammatory, lipid peroxidation-inhibiting and free radical-scavenging effects. It is a complex of five major compounds, and silibinin is the most biologically active component of the complex. The aim of this study was to investigate, evaluate and confirm the potential antioxidative effects of silymarin rich in silibinin.

PP217—CORRELATION BETWEEN IN VITRO TESTS FOR BLOOD BRAIN BARRIER PENETRATION WITH IN VIVO GLICLAZIDE PENETRATION M. Lalic-Popovic; V. Vasovic; H. Al-Salami; S. Golocorbin-Kon; B. Milijasevic; and M. Mikov Department of Pharmacy; Department of Pharmacology, Toxicology and Clinical Pharmacology, Faculty of Medicine, Novi Sad, Serbia; School of Pharmacy, Curtin University, Perth, WA, Australia; and Faculty of Pharmacy, University of Montenegro, Podgorica, Montenegro Introduction: Nowdays, great effort is put into development of effective in vitro model for prediction of blood brain barrier (BBB) penetration of drugs. Recent investigation showed that gliclazide has protective effect on the brain of diabetic rat, but it has low BBB permeability that could be increased. Aim: The aim of this study was to investigate whether in vitro models of gliclazide distribution in systems n-octanol/water and cyclohexane/ water are good in vitro models for the prediction of its penetration as well as for the prediction of influence of dexycholic acid (DCA) influence on penetration. Patients (or Materials) and Methods: Distribution coefficient (logD) was determined using a ...Flask shake “method. Partition profile was determined over physiological pH range (from pH 1.2 HCl solution, pH 4.5 acetate buffer, pH 6.8 and 7.4 phosphate buffer, and pH 7 distilled water) for 5 combinations of n-octanol or cyclohexane with aquase gliclazide solution (10 μg/mL) of different pH and with or without the addition of DCA (0.5 mM) into n-octanol or cyclohexane phase. The analyses were done in triplicate for each pair of organic solvent/ water. Concentrations of gliclazide were determined using high-performance liquid chromatography. Values of logD at pH 7.4 were compared with literature date of gliclazide BBB penetration and influence of DCA on it penetration. Results: Higher partition into organic layer was found in system n-octanol/water than cyclohexane/water. Also DCA increased partition of gliclazide in system cyclohexane/water but not in system n-octanol/ water. Value of logD at pH 7.4 without DCA in organic layer in system n-octanol/water was 0.34 (0.05) and in system cyclohexane/water was –0.74 (0.11). Value of logD at pH 7.4 with DCA in organic layer in system n-octanol/water was 0.54 (0.07) and in system cyclohexane/water was 0.18 (0.01). Thus, partition of gliclazide in system cyclohexane/water better correlate with in vivo data where penetration of gliclazide was increased with DCA pretreatement, but in diabetic animals, penetration was increased in group with and without DCA pretreatment what this in vitro system could not predict. Conclusion: Investigated system cyclohexane/water predicted poor gliclazide BBB penetration and the influence of DA on gliclazide penetration but system n-octanol/water failed to do so. However, more substances are need to claim that system cyclohexane/water successfully could predict drugs BBB penetration. Funding Source: This work has been supported by Ministry of Science and Technology development of Serbia N041012.