Chemical composition, botanical evaluation and screening of radical scavenging activity of collected pollen by the stingless bees Melipona rufiventris (Uruçu-amarela)

Silva, Tania M. S.; Câmara, Celso A.; Lins, Antonio C. S.; Agra, Maria de Fátima; Silva, Eva M. S.; Reis, Igor T.; Freitas, Breno Magalhães

doi:10.1590/s0001-37652009000200003

Cited by 51 publications

(39 citation statements)

References 21 publications

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“…The IC50 of propolis extract for DPPH assay was 4.27 mg/ml. Specific pollen foraging activity and different diets of stingless bee itself may cause a difference in antioxidant activity [21][22].…”

Section: Figurementioning

confidence: 99%

Phytochemical analysis and antioxidant activities of Trigona Apicalis propolis extract

Rosli¹,

Roslan²,

Omar³

et al. 2016

AIP Conference Proceedings

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Abstract. Propolis is a resinous substance found in beehives. It provides beneficial effects on human health and has been used to treat many diseases since ancient times. The objectives of this study were to analyze the phytochemical profile of propolis derived from local T. apicalis species and its antioxidant activities. The ethanolic extract of propolis was subjected to HPLC analysis to analyze its phytochemical profile. The propolis extract was later tested for antioxidant capacities by using DPPH radical scavenging assay. TPC and TFC were performed to determine the correlation with its antioxidant activities. TEAC for each serial dilution sample was 2621.15 (4.76 mg/mL), 2050.85 (2.38 mg/mL), 1883.27 (1.19 mg/mL), 1562.67 (0.59 mg/mL), 1327.82 (0.29 mg/mL), 1164.49 (0.15 mg/mL), 983.27 (0.07 mg/mL), and 944.79 (0.04 mg/mL). The results demonstrated that the antioxidant activities of propolis extract were dose dependent. The IC50 of propolis for DPPH assay was 4.27 mg/ml. Correlation values of TPC and TFC against DPPH indicate that the antioxidant activities of propolis extract used in this study could be mainly influenced by the phenolic and flavonoid contents. These findings highlighted the importance of quality analysis in order to ensure the consistency of biological effects or therapy of a natural product, such as propolis.

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Section: Figurementioning

confidence: 99%

Phytochemical analysis and antioxidant activities of Trigona Apicalis propolis extract

Rosli¹,

Roslan²,

Omar³

et al. 2016

AIP Conference Proceedings

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“…9 Kaempferol and quercetin can be used as markers for determining the quality of bee pollen, suggesting their potential role in prevention of free radical-implicated diseases such as cancer, cardiovascular diseases and also diabetes, among others. 10,11 Bee pollen has been shown to possess antimicrobial, 12,13 antifungal, 12,13 antioxidant, 11,13,14 anti-radiation, 15 hepatoprotective, 16,17 antiestrogenic, 18,19 antigenotoxic/antimutagenic, 13,18 anticancerogenic, 18 antiinflammatory, 13 and various anti-histopathologic capacities. 20 Pollen has been described as "nature's perfect food" for centuries and is a highly concentrated food source.…”

Section: Introductionmentioning

confidence: 99%

Changes in Intestinal Morphology of Rats Fed with Different Levels of Bee Pollen

Toman¹,

Hájková²,

Hluchý³

2015

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Context: Bee pollen has been related to therapeutic properties including antibiotic, antineoplasic, antidiarrhoeic and antioxidant activities. However, little is known about the effect of pollen feeding on the intestinal structures and functions. Aims: The objective of this study was to evaluate the small intestine morphology in rats fed with three different pollen levels. Materials and Methods: Forty rats were randomly separated into 4 groups of 10 rats each. Control group (C) was fed with a basic diet, group L received a diet supplemented with 0.2% (w/w), group M with 0.5% (w/w) and group H with 0.75% (w/w) bee pollen for 90 days. The relative volume of intestinal mucosa structures, length of villi and Lieberkühn crypts formation were evaluated. Results: Quantitative morphometry and histology methods revealed significant increase in the relative volume of epithelium (P<0.0001) and decrease in the connective tissue volume (P<0.0001) of jejunum in groups M and H as compared to the control. The intestinal villi length significantly (P<0.0001) increased in all experimental groups. On the other hand, the Lieberkühn crypts depth significantly (P<0.0001) increased only in groups L and M but decreased (P<0.0001) in the highest pollen-exposed group H. Conclusion: The most significant results were recorded in the medium pollen exposed group. We conclude that the bee pollen concentration of 0.5% is the most effective in the increase of relative volume of the intestinal epithelium and villi length. The results demonstrated that bee pollen affects the small intestine development in a concentration-dependent manner and could be beneficial for intestinal function.Key words: Bee pollen, Histology, morphometry, Rat, Small intestine. PICTORIAL ABSTRACT SUMMARY• Bee pollen enhances the develop ment of the small intestine in rats from 4 weeks to 4 months of age • Intestinal epithelium volume, villi length and crypts depth increase.• Bee pollen acts in a concentration-dependent manner.Abbreviations used: w/w: Percent Concentration Weight/Weight.

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“…It has been successfully used for the treatment of some cases of benign prostatitis and for oral desensitization of children with pollen allergy (7). It has been reported that pollen has free radical scavenging activity (8).…”

Section: Introductionmentioning

confidence: 99%

The effect of oral honey and pollen on postoperative intraabdominal adhesions

Celepli¹,

Kısmet²,

Kaptanoğlu³

et al. 2011

Turk J Gastroenterol

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Chemical composition, botanical evaluation and screening of radical scavenging activity of collected pollen by the stingless bees Melipona rufiventris (Uruçu-amarela)

Cited by 51 publications

References 21 publications

Phytochemical analysis and antioxidant activities of Trigona Apicalis propolis extract

Phytochemical analysis and antioxidant activities of Trigona Apicalis propolis extract

Changes in Intestinal Morphology of Rats Fed with Different Levels of Bee Pollen

The effect of oral honey and pollen on postoperative intraabdominal adhesions

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