Dimyristoylphosphatidylcholine (DMPC) particles of different sizes were prepared by a short sonication of the lipid followed by fractionation on a Sepharose CL-4B column. Column fractions were pooled to give DMPC multilamellar liposomes, and vesicles ranging in average diameters from 300 to 220 A. These particles were used to prepare complexes with bovine apolipoprotein A-I (apo A-I). Reaction ...

The pharmacokinetics, organ distribution, and 24-hr urinary excretion of negatively charged 99mTc-labeled multilamellar liposomes, composed of dimyristoylphosphatidylcholine and dimyristoylphosphatidylglycerol in a 7:3 molar ratio, were studied in seven patients with cancer. The radiolabeled liposomes were administered i.v. in three doses: 150 mg/sq m of body surface area; 300 mg/sq m; and 450 ...

Phospholipid-ethanol-aqueous mixtures containing bilayer-forming lipids and 20-50 wt.% of water form viscous gels. Further hydration of these gels results in the formation of liposomes whose morphology depends upon the lipid type. Upon hydration of gels containing mixtures of the lipids 1-palmitoyl-2-oleoyl-phosphatidylcholine (POPC) and 1-palmitoyl-2-oleoyl-phosphatidylglycerol (POPG), small h...

In contrast to artificial molecules, natural photosensitizers have the benefit of excellent toxicity profiles and life-compatible activating energy ranges. Flavins are such that were selected by nature in a plethora light-triggered biochemical reactions. Flavin-rich nanoparticles could thus emerge as promising tools photodynamic therapies active-targeting drug delivery. Self-assembled flavin-co...

Neutral and negatively charged liposomes containing Adria mycin (ADM) were examined for the efficiency of drug entrap ment, serum stability, in vivo tissue distribution, and tumorinhibitory activity. Entrapment of ADM in negatively charged liposomes containing phosphatidylserine (PS) or cardiolipin (DPG) was 3to 4-fold higher than in neutral phosphatidylcholine (PC) liposomes with or without ch...

Trans-Resveratrol (RV) was encapsulated in multi-lamellar liposomes (MLLs) composed of a mixture phosphatidylcholine (P100), Tween 80 (T80) and water. The P100-to-T80 ratio as well their water content were chosen based on previous study to promote transdermal transport RV. effect RV the size, elasticity, charge MLLs evaluated encapsulation apparent solubility diffusion artificial skin, namely S...

Neutral and negatively charged liposomes containing Adria mycin (ADM) were examined for the efficiency of drug entrap ment, serum stability, in vivo tissue distribution, and tumorinhibitory activity. Entrapment of ADM in negatively charged liposomes containing phosphatidylserine (PS) or cardiolipin (DPG) was 3to 4-fold higher than in neutral phosphatidylcholine (PC) liposomes with or without ch...

Intravenous injection of liposomes can cause significant pulmonary hypertension in pigs, a vasoconstrictive response that provides a sensitive model for the cardiopulmonary distress in humans caused by some liposomal drugs. The reaction was recently shown to be a manifestation of "complement activation-related pseudoallergy" (CARPA; Szebeni J, Fontana JL, Wassef NM, Mongan PD, Morse DS, Dobbins...

After one extradural injection of 0.25% bupivacaine 0.3 ml and 3H-bupivacaine 0.005 mCi in multilamellar liposomes, no systemic radioactivity (plasma, liver, heart muscle) was obtained for 1 h, and the labelling was less than that of systemic distribution of plain bupivacaine for the following 3 h. In contrast, radioactivity in the lumbar spinal nerves peaked in the first hour and remained high...