Isolation of estrone and cholesterol from the date palm, Phoenix dactylifera L.

Bennett, Raymond D.; Ko, Shui-Tze; Heftmanń, Erich

doi:10.1016/s0031-9422(00)85122-5

Cited by 84 publications

(20 citation statements)

References 18 publications

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“…Several previous studies on DPP showed the presence of estrone, α-amirin, triterpenoidal saponins, flavonoids and a crude gonadotrophic substance (Mahran et al, 1976;Mahran et al, 1985;Bennet et al, 1996). More recently, DPP has been noted to contain estrone, estradiol and estriol, in addition to five flavonoid compounds (Abbas & Ateya, 2011).…”

mentioning

confidence: 94%

Assessment of polyphenol composition, antioxidant and antimicrobial properties of various extracts of Date Palm Pollen (DPP) from two Tunisian cultivars

Daoud

Drira

Bakari

et al. 2019

Arabian Journal of Chemistry

156

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This study aimed to investigate and compare the total phenolic (TPC) and flavonoid (TFC) contents and antioxidant and antibacterial activities of different extracts recovered from Date Palm Pollen collected from Tunisian cultivars of Kerkennah (DPP-K) and Tozeur (DPP-T) using various solvents, including hexane, chloroform, ethyl acetate, acetone, ethanol and water. The results revealed that DPP-T had higher TPC than DPP-K for all solvent extracts, except for hexane, with a value of 237.74 ± 9.58 mg GAE/g for the water extract. The highest level of TFC (75.10 ± 4.37 mg QE/g) was recorded in the acetone DPP-T extract, which was about twice as high as that of DPP-K. A total of eight phenolic compounds were identified and quantified in both extracts by HPLC, namely gallic acid, catechin, caffeic acid, epicatechin, vanillic acid, coumarin, quercitin and rutin. The antioxidant activities of the extracts were screened using DPPH and β-carotene bleaching assays. The results indicated that the DPP-T acetone extract showed the best DPPH scavenging activity (IC 50 = 46.56 ± 0.28 µg/ml), with no activity being recorded for DPP-K. The DPP-T extract also showed significant effects in terms of the β-carotene test (28.12 ± 0.04 µg/ml) when compared to BHT as a reference standard. The extracts were screened for antimicrobial activity against 10 bacterial and 7 fungal strains, and the results showed that ethyl acetate DPP-K extract exhibited the strongest activity against L. monocytogenes and that the S. aureus strain was most sensitive to DPP-T, with MIC and MBC values of 0.98 mg/ml and 1.95 mg/ml, respectively. Both DPP-T and DPP-K showed strong inhibition effects on the growth of F. oxysporum. Further time kill assays demonstrated the potency of DPP-K and DPP-T ethyl acetate extracts to inhibit the growth of L. monocytogenes and S. aureus, respectively.Overall, the findings suggest that DPP could be considered a promising source of new natural antioxidant and antimicrobial agents for use in various food and pharmaceutical products and formulations. This suggested that the DPP extract is a good potential inhibitor of food 3 spoiling microbial growth and could be a highly effective therapeutic choice for human and plant infections.

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confidence: 94%

Assessment of polyphenol composition, antioxidant and antimicrobial properties of various extracts of Date Palm Pollen (DPP) from two Tunisian cultivars

Daoud

Drira

Bakari

et al. 2019

Arabian Journal of Chemistry

156

View full text Add to dashboard Cite

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“…DPP differs from bee pollen in that it is of a known source; it is homogeneous, pure and easily standardised. Reports have also identified microelements contained within DPP that contain sterols and other agents that might influence male fertility (Bennet et al, 1966;Bajpayee, 1997). DPP and male palm flowers were traditionally regarded as aphrodisiacs and fertility enhancers (Zaid, 1999;Khare, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…DPP extracts contain oestrogenic compounds, oestronesgonadstimulating compounds that can improve male infertility and elicit gonadotrophin activity in rat models (Dostal et al, 1996;Bajpayee, 1997). Reports have also identified microelements contained within DPP that contain sterols and other agents that might influence male fertility (Bennet et al, 1966;Bajpayee, 1997). In regard to these components, some snack foods have been supplemented with date pollen to improve male infertility (Abde-el-Mageed et al, 1987).…”

Section: Introductionmentioning

confidence: 99%

Therapeutic effects of date palm (Phoenix dactyliferaL.) pollen extract on cadmium-induced testicular toxicity

2012

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Cadmium (Cd) is a well-known testicular toxicant. This study was designed to explore the long-term effects of a single low dose of Cd on spermatogenesis, and testicular dysfunction and oxidative stress, and the therapeutic potential of date palm pollen extract (DPP) in averting such reproductive damage. Adult male Wistar rats received a single intraperitoneal injection of CdCl2 (0 or 1 mg kg(-1) ). Twenty-four hours later, they started receiving DPP (0 or 40 mg kg(-1) ) orally, once daily for 56 consecutive days. Cd exposure caused significant reproductive damage via reduced weight of the reproductive organs, which includes spermatological damage (decreased sperm count and motility and increased rates of sperm abnormalities), increased oxidative stress (increased malondialdehyde and decreased reduced glutathione levels), histological alterations (necrosis, inefficient to completely arrest spermatogenesis and a reduced Johnsen's score) and decreased serum testosterone level. DPP restored spermatogenesis and attenuated the toxic effects of Cd on the reproductive system to the levels observed in the control animals. These findings support the hypothesis that the testis is particularly sensitive to Cd, which can cause testicular damage and infertility. Treatment with DPP can ameliorate the deleterious effects of Cd, probably by activating testicular endocrine and antioxidant systems.

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“…Abundant evidence that plants synthesize estrogens has been presented elsewhere (Bennett et al 1966;Gawienowski and Gibbs 1969;Kopcewicz 1971;Zhang et al 1991;Milanesi et al 2001), but the mode of action of plant estrogens and any similarity to estrogen activity in animals remains to be proven. Abundant evidence that plants synthesize estrogens has been presented elsewhere (Bennett et al 1966;Gawienowski and Gibbs 1969;Kopcewicz 1971;Zhang et al 1991;Milanesi et al 2001), but the mode of action of plant estrogens and any similarity to estrogen activity in animals remains to be proven.…”

Section: Discussionmentioning

confidence: 99%

Estradiol distribution during the development and expression of reproductive structures in Populus tremuloides Michx.

2003

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Estradiol (E 2 ) was measured in spring and winter tissues in several populations of dioecious Populus tremuloides Michx. and in four trees with perfect flowers. A correlation between the concentration of E 2 and sex expression was observed. In catkins, E 2 concentrations increased before anthesis, peaked during flowering, and decreased as flowers matured. The increases were concurrent with sporogenesis and development of gametophytes. Statistically significant seasonal variation in E 2 concentration was also evident. Dormant winter tissues showed significantly lower E 2 concentrations than spring tissues. Branches exposed to relatively more light had significantly higher E 2 content in both spring and winter. Seasonal variation in E 2 content was also observed in trees of the same sex, among branches of the same tree, and among different organs.

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Isolation of estrone and cholesterol from the date palm, Phoenix dactylifera L.

Cited by 84 publications

References 18 publications

Assessment of polyphenol composition, antioxidant and antimicrobial properties of various extracts of Date Palm Pollen (DPP) from two Tunisian cultivars

Assessment of polyphenol composition, antioxidant and antimicrobial properties of various extracts of Date Palm Pollen (DPP) from two Tunisian cultivars

Therapeutic effects of date palm (Phoenix dactyliferaL.) pollen extract on cadmium-induced testicular toxicity

Estradiol distribution during the development and expression of reproductive structures in Populus tremuloides Michx.

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