Family • Verbenaceae - Petraea volubilis Linn. - SANDPAPER VINE - Lan hua teng
|Petraea volubilis Linn.|
|Petraea kohautiana C. Presl.|
|Purple wreath (Engl.)|
|Queen’s wreath (Engl.)|
|Sandpaper vine (Engl.)|
|Sweet patria (Engl.)|
Other vernacular names
|CHINESE: Lan hua teng.|
|TAMIL: Kudirai valuppu.|
Additional Sources and Suggested Readings
(1) A Review of Medicinal Plant Research at the University of the West Indies, Jamaica, 1948–2001 / SA Mitchell, MH Ahmad / West Indian Med J 2006; 55 (4): 243
(2) Purple Wreath / Common names / Flowers of India
(3) PHYTOCHEMICAL AND BIOLOGICAL STUDY OF PETREA VOLUBILIS L. (VERBENACEAE / )
M. F. Abdelwahab, A. Abdel-Lateff, M. A. Fouad*, S. Y. Desoukey and M. S. Kamel / Bull. Pharm. Sci., Assiut University, Vol. 34, Part 1, 2011, pp. 9-20.
Sandpaper vine is a slender, woody climber. Leaves are leathery, stiff and crisp, opposite, oblong-ovate, up to 6 to 12 centimeters long, the upper surface dull green and the lower surface bright emerald green, and with entire or slightly sinuate margins. Both surfaces are harsh and rough-textured like sandpaper. Flowers are violet, purple, or bluish, and 5-lobed, in long, terminal racemes. Sepals are showy, spreading, and star-shaped. Corolla is spreading, 5-lobed, violet, smaller than the calyx. Fruit is small, 1- to 2-seeded, embedded in the short calyx tube.
– Introduced to the Philippines probably after the Second World War.
– Native to tropical America.
– No reported folkloric medicinal use in the Philippines.
– In Bangladesh, used for diabetes.
– Flowers used South American folk medicine.
– In Jamaica, reported use as abortifacient.
• Antidiabetic: Study evaluated the antihyperglycemic potential of leaves of P. volubilis and stems of E. agalloch. The methanolic extracts of leaves of P. volubilis showed dose-dependent and significant reductions of serum glucose in mice.
• Biologic Activities / Secondary Metabolites: Biologic activities of total extract and different fractions evaluated in various bioassays showed significant activities in the applied test systems: antioxidant, anti-inflammatory, analgesic, antipyretic, and antibacterial. Purification of ethyl acetate extract yielded apigenin, quercetin, 4`, 6-dimethylscutellarien, hypogallic acid (3,4- dihydroxybenzoic acid), trans-caffeic acid vanillic acid and acteoside.
• Acute Toxicity Study: Acute toxicity study showed an LD50 value of 8 g/kg indicating a large margin of safety for the total extract of Petrea volubilis.
• Anti-Inflammatory / Antioxidant / Antipyretic: In evaluation for anti-inflammatory activity, the most powerful reduction of paw edema induced by carrageenan was obtained with an n-butanol fraction and a total methanolic extract. The most pronounced antioxidant effect was seen with a methanolic extract at a dose of 1 g/kg. The most effective fraction to show antipyretic activity were n-butanol and the total methanolic extract. A total methanolic extract showed moderate analgesic activity, A total methanolic extract showed the most effective antibacterial effect among the tested fractions, attributed to its phenolic constituents.