ABSTRACT
Non-immunoglobulin intracytoplasmic inclusions in plasma cells of multiple myeloma are very rare presentation. These are morphologically similar to Auer rods but chemically different from them. We studied two cases of multiple myeloma in a 60-year-old woman and 45-year-old man. In both cases, plasma cells of bone marrow aspirate revealed multiple Auer rod-like inclusions (ARLI). Sudan black B (SBB) and myeloperoxidase (MPO) cytochemistry were negative. Serum protein electrophoresis in both of them showed M spike, one with raised IgA-kappa levels, while the other with raised IgG-kappa levels. Very few case reports have been published in the literature and its prognostic implications are still unknown. Due to its rarity, it is important to distinguish such cases from acute myeloid leukemia and its exact incidence with its therapeutic and prognostic implications
ABSTRACT
ABSTRACT In search of lead molecules for use in disease prevention and as food additive from natural sources, two flavanols were isolated from leaves of Anthocephalus cadamba (Roxb.) Miq., Rubiaceae. Their structures were established as 6-hydroxycoumarin-(4"→8)-(-)-epicatechin and 6-hydroxycoumarin-(4"→8)-(-)-epicatechin-(4→6‴)-(-)-epicatechin on the basis of spectroscopic data. Both the compounds exhibited potent antioxidant and antigenotoxic activity. 6-Hydroxycoumarin-(4"→8)-(-)-epicatechin scavenged DPPH, ABTS+.and superoxide anion radicals with IC50 values of 6.09 µg/ml, 5.95 µg/ml and 42.70 µg/ml respectively whereas the IC50 values for 6-hydroxycoumarin-(4"→8)-(-)-epicatechin-(4→6‴)-(-)-epicatechin were 6.62 µg/ml for DPPH free radicals, 6.93 µg/ml for ABTS radical cations and 49.08 µg/ml for superoxide anion radicals. Both the compounds also exhibited potent reducing potential in reducing power assay and protected the plasmid DNA (pBR322) against the attack of hydroxyl radicals generated by Fenton's reagent in DNA protection assay. In SOS chromotest, 6-hydroxycoumarin-(4"→8)-(-)-epicatechin decreased the induction factor induced by 4NQO (20 µg/ml) and aflatoxin B1 (20 µg/ml) by 31.78% and 65.04% respectively at a concentration of 1000 µg/ml. On the other hand, 6-hydroxycoumarin-(4"→8)-(-)-epicatechin-(4→6‴)-(-)-epicatechin decreased the genotoxicity of these mutagens by 37.11% and 47.05% respectively. It also showed cytotoxicity in COLO-205 cancer cell line with GI50 of 435.71 µg/ml. Both the compounds showed moderate cyclooxygenase-2 inhibitory activity.
ABSTRACT
Carriage of medicaments assigned in the forms of conventional dosage is restricted to the eye; moreover, favorable drug concentrations in the destination tissues are not kept up for an extended time spread given that the eyes are escorted via an inimitable anatomy, physiology and biochemistry. The clearcut aim of designing a therapeutic system is to attain a desirable concentration of a drug at the active site for the relevant duration. A successful design of a drugdelivery system, therefore, desires an integrated knowledge of the drug molecule and the restrictions offered by the ocular route of administration. In last decade, with the emergence of miscellaneous powerful and multifaceted medicinal substitutes, the assortment of traditional ophthalmic preparations has progressively developed; drawing out considerably apart from ordinary solutions, suspensions and ointments, presently comprises a diversity of drug administration formats. Present communication echoes miscellaneous barriers and successive blossoms in the field of ocular therapeutics.
ABSTRACT
Tinospora cordifolia is used in Ayurveda as "Rasayanas" to improve the immune system and the body resistance against infections. Polysaccharides are the main constituents which are considered to be responsible for immune enhancement. In this study, immunomodulatory activity of three polysaccharide enriched fractions was evaluated using the polymorphonuclear leukocyte function test. Sugar composition was determined by GC-MS analysis of the derivatised fractions. The active polysaccharide fractions mainly constitute glucose, fructose and arabinose as monomer units.
ABSTRACT
Drug delivery in ocular therapeutics is a challenging problem and is a subject of interest to scientists working in the multidisciplinary areas pertaining to the eye. Most ocular diseases are treated by topical drug application in the form of solutions, suspensions and ointment. These conventional dosage forms suffer from the problems of poor ocular bioavailability, because of various anatomical and pathophysiological barriers prevailing in the eye. Various efforts in ocular drug delivery have been made to improve the bioavailability and to prolong the residence time of drugs applied topically onto the eye. The potential use of polymeric nanoparticles as drug carriers has led to the development of many different colloidal delivery vehicles. Indeed, the association of an active molecule to a nanocarrier allows the molecule to intimately interact with specific ocular structures, to overcome ocular barriers and to prolong its residence in the target tissue. This review discusses the physiochemical characterization, fabrication techniques, therapeutic significances, patented technology of Eudragit based nanoparticles and future possibility in the field of ocular drug delivery.