ABSTRACT
Psoriasis is a chronic, mild and common inflammatory skin condition. Still an ideal treatment for psoriasis, effective, safe, convenient, and economical is not available. In this scenario, the search for suitable alternative treatments with minimal side effects is necessary. Plants can be effective and alternative in this regard. Therefore, this article discusses the leaves of the plants Thespesia populnea (Malvaceae) that are traditionally used in the treatment of psoriasis. The present study aimed to assess anti-psoriatic activity. The dried leaves of the plants were subjected to soxhlation with 95% ethanol and phytochemical studies were performed. The anti-psoriatic activity was evaluated by the Mouse-Tail model. It is a relatively sensitive and reproducible morphometric method that allows quantitative evaluation of the effects of anti-psoriatics through epidermal differentiation. Extracts were applied topically at a dose of 500mg/kg over 14 days and at the end, the animals were sacrificed, longitudinal histological sections were made of the tail skin and the degree of orthokeratosis was determined. It was significantly (P <0.05) increased by the ethanolic extract of Thespesia populnea (52.86±2.86) compared to the control (17.30±4.09). In relative epidermal thickness, the ethanolic extract of Thespesia populnea (92.68±8.8) showed a significant difference (P <0.05) compared to the control (100±10.7). The data obtained suggest that the selected plant has anti-psoriatic activity and confirms its traditional use in the treatment of psoriasis.
ABSTRACT
This study examined the oral anti-inflammatory potential of aqueous extract of Thespesia populnea Linn bark. Soland. Ex. Corr. (Family: Malvaceae) which is used by Sri Lankan native practitioners to treat skin ailments and arthritis. This was tested in conscious male Wistar rats using carrageenan induced paw edema model and three oral doses; 1250, 2500 and 5000mg/kg. Indomethacin was used as the reference drug. The result showed that the aqueous extract of bark significantly P<0.05 and dose dependently inhibited both early (1-2 h) and late phase (4-5 h) of inflammation in the carrageenan model. In addition, it inhibited the intermediated phase (3 h). The anti-inflammatory activity of the highest doses of extract was comparable to that of indomethacin. The extract did not display overt signs of toxicity and was neither hepatotoxic, renotoxic nor hematotoxic even with chronic administration. It is concluded that aqueous bark extract of Thespesia populnea can function as an orally active, safe and potent anti-inflammatory agent.
ABSTRACT
The 2 hydroxy1, 4 nathaquinone [Thespesone] was isolated from bark of Thespesia populnea which is belonging to famile Malvaceae. The isolated compound then analysed by IR, NMR, UV.
ABSTRACT
Aims: To evaluate the anti-inflammatory, antinociceptive and antiarthritis activities of methanolic extract of T. populnea flower (TPF) and root (TPR) extract; yet unreported. Study Design: Extraction and administration of bioactive extract. Place and Duration of Study: Department of Pharmacology and Department of Pharmacognosy, R.V.S. College of Pharmaceutical Science, Sulur, Coimbatore, Tamilnadu, India, between June 2010 and July 2011. Methodology: Thespesia populnea flowers and roots were extracted by soxhlet extraction using methanol. Anti-inflammatory activity of TPF and TPR was studied by using acetic acid induced vascular permeability and cotton-pellet granuloma. The antinociceptive activity of TPF and TPR was evaluated using formalin-induced paw licking response and the hot-plate test. The antiarthritic activity was studied by using adjuvant-induced arthritis model in rat. In addition total flavonoid content was determined with spectrophotometric method. Results: Administration of TPF and TPR (400 mg/kg) significantly (P < 0.01) decreased the formation of granuloma tissue induced by cotton pellet at a rate of 37.06% and 25.76% respectively. TPF and TPR inhibited acetic acid-induced vascular permeability in mice. In the adjuvant-induced arthritis test TPF and TPR inhibited 50.68% and 30.13% of paw thickness respectively. TPF and TPR also produced significant (P < 0.01) analgesic activity in formalin-induced paw licking response. In the hot-plate test, TPF and TPR have shown significantly (P < 0.01) increased in latency time when compared with control. Conclusion: Altogether, the present data demonstrate the anti-inflammatory antinociceptive and antiarthritis properties of flower and root of Thespesia populnea suggesting its potential role as adjuvant therapeutic tool for the management of inflammatory-related diseases.