Introduction:Propolis is a resinous substance collected by bees to protect their hives. One of the least explored function of propolis is its antiemetic activity. The present study aimed to investigate the antiemetic activity of Trigona spp. propolis from three provinces of Indonesia. Methods: Ultrasound-assisted extraction using two kinds of solvent, water and ethanol was conducted to extract propolis from South Sulawesi, South Kalimantan and Banten. Antiemetic activity was observed on copper sulfate-induced emesis in young chicks. Result: All propolis indicated antiemetic activity, in which water extract had higher activity than ethanol extract. Regardless the type of solvents, propolis from South Sulawesi showed higher antiemetic activity than others. Conclusion: This study demonstrated that propolis has antiemetic activity, in which propolis from South Sulawesi showed the highest activity and water extraction is recommended. Key words: Antiemetic, Propolis, Retching, Stingless bee, Trigona spp. factor that influences propolis biological activity. However, there are conflicting result on types of solvent used to generate highest biological activity. Some studies found ethanol extract had higher antioxidant activity and total phenol compared to water extract. While, some other found water is a better solvent to generate high antioxidant activity and total phenol. 11,12,13 This study aimed to investigate the antiemetic activity of propolis from three provinces of Indonesia, using two types of solvent (ethanol and water). We applied ultrasound-assisted extraction to yield more efficient and effective extract.
Al Mukhlas
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MATERIALS AND METHOD
MaterialsRaw propolis were collected by bee-keeper in South Sulawesi, South Kalimantan and Banten. The species of bees were all stingless bees (Trigona spp.) namely Tetragonula biroi(South Kalimantan), HeteroTrigona itama (South Kalimantan) and Tetragonula laevicep (Banten). We used copper sulfate (CuSO 4 ) as emetogenic substance and metoclopramide as positive control. Dimethyl sulfoxide (DMSO) and Tween 80 were used as solvent for injected propolis.
AnimalsThe young chicks (aged 4 days) and weighing from 50-80 g were purchased from Cibadak Indah Sari Farm, Jakarta, Indonesia. All animal experiments were carried out in accordance with the acts of The 121 found water extract of Brazilian propolis demonstrated higher antiemetic activity than hydro alcohol extract. The reason is still unclear. However, it is suspected that there are other water soluble compounds, such as glucoside, polysaccharides, saponins that work as inhibitor of some emesis receptors.
22Some experimental animals have been widely developed as an emetic model such as: ferret, mink, monkey, pig, rat, frog, dog and chick. 23 Chick as emesis animal model has been used by many researchers. 7,17,24,25,26 These model is better than frog emesis model because it has some advantages such as, easy to handle and able to visually observed and required shorter time.
26CuSO 4 -induced chicks emesis model are su...