Abstract
The aim of this study was to evaluate the antioxidant and antiproliferative activities of PSO in vitro and its application in horse oil storage. We determined the reducing power of PSO and its scavenging effects on hydroxyl (•OH) and 1,1-diphenyl-2-picrylhydrazyl radicals (DPPH•) and tested its stabilizing effects on horse oil storage. The results showed that PSO had remarkable, dose-dependent antioxidant activities, and it effectively prevented horse oil lipid oxidation. We treated cervical cancer HeLa cells, esophageal cancer Eca-109 cells and breast cancer MCF-7 cells with PSO using non-neoplastic monkey kidney Vero cells as controls. The results indicate that PSO significantly inhibited tumor cell growth in a time- and dose-dependent fashion. Our studies suggest that PSO may be used as a substitute for synthetic antioxidants in food preservation and may be potentially useful as a food and cosmetic ingredient. Meanwhile, the oxidative stress can cause hypertension, so PSO is expected to develop a health care products for the prevention and mitigation hypertensive symptoms.
Highlights
Purslane (Portulaca oleracea L.) is a widely distributed weed that is extensively used as an edible plant and as a traditional Chinese herbal medicine [1]
The hydroxyl free radical scavenging capacity can be used as an indicator of antioxidant activity
We reason that the stronger antioxidant activity of purslane seed oil (PSO) may be attributed to its higher content of linolenic acid
Summary
Purslane (Portulaca oleracea L.) is a widely distributed weed that is extensively used as an edible plant and as a traditional Chinese herbal medicine [1]. Both the leaves and seeds of purslane can be consumed orally or applied topically to soothe a skin allergy [2]. PSO is expected to show superior antioxidant activity and antitumor effects due to its high omega-3 fatty acid content. It is a good candidate as both a health food and a cosmetic ingredient
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