Antioxidant Activity of some Secondary metabolites from Tapinanthus bangwensis (Engl., and K. Krause) [Loranthaceae] Grown in Nigeria

Atewolara-Odule, Odunayo Christy; Aiyelaagbe, Olapeju O.; Olubomehin, Oseyemi Omowunmi; Ogunmoye, Abdulrazaq; Feyisola, Roseline Tolulope; Sanusi, Anwar

doi:10.1016/j.sciaf.2020.e00348

Cited by 5 publications

(7 citation statements)

References 17 publications

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“…The results of the proximate and mineral analysis of the T. bangwensis are in agreement with Njoya et al, (2) and Atewolara-Odule et al, (25) on the biological activities and nutritional value of T. bangwensis leaves. The values are also comparable to values reported for some Nigerian leafy vegetables (26).…”

Section: Discussionsupporting

confidence: 91%

Nutritional and Phytochemical Properties of Aqueous Leaf Extract of Mistletoe (Tapinanthus Bangwensis) Grown on Orange Tree

Nwoke

Imaga

Omojufehinsi

et al. 2022

JBMS

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Background: African mistletoe (Tapinanthus bagwensis) is a parasitic plant commonly used in folk medicine. The bioconstituents and thus its nutritional and ethnomedicinal uses may be greatly affected by ecological interactions between the plant and host. Objectives: This study investigated the proximate and phytochemical compositions of aqueous leaf extract of Tapinanthus bangwensis grown on orange tree. Methods: Standard methods of the Association of Official Analytical Chemists (AOAC) was used to evaluate the proximate and mineral elements compositions of Tapinanthus bangwensis aqueous leaf extract. Vitamins content and presence of lectin was quantified using high performance liquid chromatography and via hemagglutinating activity respectively. Phytochemicals were determined using spot test and spectrophotometrically. Results: The proximate analysis revealed that T. bangwensis aqueous leaf extract contained total carbohydrate (12.72 ± 0.1 %), crude fat (9.65±0.3%), protein (6.8 ± 0.4%), ash (3.5 ± 0.1%), moisture (0.13 ± 0.2%) and crude fibre (67.2 ± 0.1%). The minerals (mg/ 100 g dry weight) present were K (147.3 ± 0.01) > Ca (90.70 ± 0.025) > P (62.9 ± 0.025) > Na (54.6 ± 0.03) > Mg (43.05 ± 0.02) > Mn (34.00 ± 0.01) > Zn (24.90 ± 0.015) > Iodine (2.05 ± 0.01). Vitamins A, D, B2, E, K, B12 and Folic acid were relatively abundant compared to other vitamins. The extract possessed lectin depicted by hemagglutination activity on different animal species’ blood samples. The phytochemicals (mg/100 g) concentration was tannin (108.65 ± 0.04), phenol (66.7 ± 0.01), flavonoid (44.58 ± 0.03), cyanogenic glycoside (24.53 ± 0.02) and saponin (2.40 ± 0.02). Conclusion: Given these nutritional, phytochemical constituents and their concentrations, T. bangwensis aqueous leaf extract could be a good nutrient source for consumers and might be beneficial in maintaining good health.

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Section: Discussionsupporting

confidence: 91%

Nutritional and Phytochemical Properties of Aqueous Leaf Extract of Mistletoe (Tapinanthus Bangwensis) Grown on Orange Tree

Nwoke

Imaga

Omojufehinsi

et al. 2022

JBMS

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“…13 C NMR (151 MHz, CDCl 3 ) δ 213.31, 59.48, 58.24, 53.11, 42.79, 42.16, 41.54, 41.29, 39.70, 39.26, 38.30, 37.45, 36.01, 35.63, 35.35, 35.03, 32.77, 32.42, 32.09, 31.78, 30.51, 30.00, 29.71, 28.18, 22.29, 20.26, 18.67, 18.24, 17.95, 14.66, 6.83 are shown in Figure 5. The NMR data from compound 1 matched those from the literature (Atewolara‐Odule et al., 2020; Mujawah et al., 2023; Sandhu et al., 2022), so this compound was identified as friedelin compound 2 (( E )−4‐(4‐hydroxy‐3‐methoxyphenyl) but‐3‐en‐2‐one) (Y1).…”

Section: Resultssupporting

confidence: 66%

“…22.29, 20.26, 18.67, 18.24, 17.95, 14.66, 6.83 are shown in Figure 5. The NMR data from compound 1 matched those from the literature (Atewolara-Odule et al, 2020;Mujawah et al, 2023;Sandhu et al, 2022), so this compound was identified as friedelin compound 2 ((E)−4-(4-hydroxy-3methoxyphenyl) but-3-en-2-one) (Y1).…”

Section: Identification Of Compounds 1 and 2 Isolated From Csmentioning

confidence: 52%

“…It has been suggested that antioxidants, which neutralize harmful free radicals, may have curative effects on conditions such as cardiovascular disease (Zhou et al., 2021), inflammatory illness (Ferrini et al., 2022), cancer, and aging (Dhalaria et al, 2020). DPPH and reducing power were utilized to test the radical scavenging capability of isolated compounds (Atewolara‐Odule et al., 2020). The antioxidant capacity of Friedelin and (( E )−4‐(4‐hydroxy‐3‐methoxyphenyl)but‐3‐en‐2‐one) was studied using four distinct in vitro assays, namely the DPPH, reducing power, H 2 O 2 , and the ABTS radicals scavenging ability tests.…”

Section: Resultsmentioning

confidence: 99%

“…The antioxidant activities exhibited by the two compounds at the concentration of 100 µM illustrated in Figure 9 were similar to that of ascorbic acid/vitamin C (the standard drug). Friedelin had a high DPPH, reducing power, H 2 O 2 , and ABTS % inhibition activity than (( E )−4‐(4‐hydroxy‐3‐methoxyphenyl)but‐3‐en‐2‐one) since they are well‐known antioxidants (Atewolara‐Odule et al., 2020).…”

Section: Resultsmentioning

confidence: 99%

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Optimizing extraction conditions and isolation of bound phenolic compounds from corn silk (Stigma maydis) and their antioxidant effects

Khan

Hayat

Khanum

et al. 2023

Journal of Food Science

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During the processing of maize, Stigma maydis, also known as corn silk, is normally discarded as waste. Phytochemical research was carried out on the S. maydis to use it as a valuable source of bioactive components. This research aimed to maximize the recovery of free and bound phenolic compounds from corn silk under optimal experimental conditions. Response surface design was operated to optimize the alkaline hydrolysis extraction of bound phytochemicals from corn silk based on total phenolic content and DPPH radical scavenging activity. The optimum conditions (i.e., NaOH concentration 2 M, digestion time 135 min, digestion temperature of 37.5°C, the solid‐to‐solvent ratio of 1:17.5, and acetone) were obtained. The optimum parameters were used to extract the corn silk. The structures of two compounds isolated from ethyl acetate extracts were then identified as friedelin (1) and (E)‐4‐(4‐hydroxy‐3‐methoxyphenyl) but‐3‐en‐2‐one (2). The DPPH, H2O2, and ABTS % inhibition of the compounds is as follows: compound (1) 74.81%, 76.8%, 70.33% and compound (2) 70.37%, 56.70% and 57.46%, respectively. The current study has opened previously unexplored perspectives of the composition of bound compounds in corn silk and established the foundations for more effective processing and utilization of corn waste. Practical Application Bound phenolic compounds from corn silk under optimal experimental conditions were obtained. Corn silk can be utilized as a type of medicinal herb as well as a source of inexpensive natural antioxidants.

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In silico docking based screening of constituents from Persian shallot as modulators of human glucokinase

Kaur

Thakur

Deswal

et al. 2022

J Diabetes Metab Disord

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Antioxidant Activity of some Secondary metabolites from Tapinanthus bangwensis (Engl., and K. Krause) [Loranthaceae] Grown in Nigeria

Cited by 5 publications

References 17 publications

Nutritional and Phytochemical Properties of Aqueous Leaf Extract of Mistletoe (Tapinanthus Bangwensis) Grown on Orange Tree

Nutritional and Phytochemical Properties of Aqueous Leaf Extract of Mistletoe (Tapinanthus Bangwensis) Grown on Orange Tree

Optimizing extraction conditions and isolation of bound phenolic compounds from corn silk (Stigma maydis) and their antioxidant effects

In silico docking based screening of constituents from Persian shallot as modulators of human glucokinase

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