In recent years heterocyclic compounds analogues and derivatives have attracted wide attention due to their useful biological and pharmacological properties. Indole, Benzothiazole and its analogs are versatile substrates, which can be used for the synthesis of numerous heterocyclic compounds. Indole, Benzothiazole and its derivatives are used in organic synthesis and they are used in evaluating new product that possesses different biological activities. Hence, their extensive structural modification has result in different analogues of Indole and Benzothiazole derivatives depicting wide range of biological and pharmacological activities such as antiviral, anticonvulsant, anti-inflammatory, analgesic, antimicrobial and anticancer. This review article literature survey summarizes the synthesis and pharmacological activities of Indole, Benzothiazole and its derivatives.
Keywords: Indole, Benzothiazole, antiviral, anticonvulsant, anti-inflammatory, analgesic, antimicrobial and anticancer
Nanobubbles are nanometer size bubbles having different constituents of varying physicochemical characteristic for the inner core and outer shell. Nanobubbles are mainly fabricated to improve the stability, bioavailability and improve the biodistribution of the delivered drug to the specific targeted site. Their small sizes bubbles allow the possibility of extravasation from blood vessels into the surrounding tissues and ultrasound-targeted site-specific release with minimal invasiveness. Nanobubbles are developing as important contrast agents for imaging and carriers for drug delivery at targeted region. Sonication is the primary method for preparation of nanobubbles followed by thin-layer evaporation, high shear emulsification, mechanical agitation and coacervation or coalescence. With exposure to ultrasound/extracorporeal shock waves, the drug is liberated from the nanobubbles into the target cells. This review paper is an effort to reveal the different formulation development techniques briefly and varying shell and core content for developing nanobubbles.
The present study was carried out to find out the gastroprotective effects of the leaves extracts of Dypsis lutescens (H.Wendl.) and Caryota Urens (L.) in aspirin-induced gastric ulcer in rats. The ethanolic and aqueous extracts were prepared from the leaves of Dypsis lutescens and Caryota Urens and were used for this study. All procured animals were divided into seven groups. Each group contain n = 6, all groups except the normal control treated with aspirin 150 mg/kg oral. Group, I served as the normal control group which received normal saline, group II served as negative control and group III as standard group receiving 20 mg/kg omeprazole and 4th to 7th groups treated with leaves extracts of Dypsis lutescens and Caryota urens respectively. Treatment was given to group II to group VII rats in every 24 h for seven days. After 24 h fasting, on the 8th-day stomach contents were aspirated under anaesthetic condition to check free and total acidity. Stomachs were opened in all sacrificed animals along the greater curvature to estimate ulcer index, percentage protection and histopathology studies.
The results of the present study revealed that the severity of aspirin-induced ulceration was significantly (P < 0.05) decreased in Dypsis lutescens extracts treated groups in comparison with the control and Caryota urens treated groups. It was observed that the free and total acidity significantly decreased in the aqueous extract of Dypsis lutescens treated group when compared with the negative control and Caryota urens treated groups.
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