Das Vitamin-C-Analogon 2-O-β-D-glucopyranosyl-L-Ascorbinsäure in Früchten aus der Familie Solanaceae (Nachtschattengewächse)

Bubloz, Carole (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland) ; Udrisard, Isabelle (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland) ; Andlauer, Wilfried (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland)

Goji-Beeren (Lycium ssp.) aus der Familie der Nachtschattengewächse (Solanaceae) werden seit Jahrhunderten aufgrund ihrer bioaktiven Inhaltsstoffe in der traditionellen Chinesischen Medizin (TCM) eingesetzt [1]. Meist handelt es sich dabei um Antioxidanzien wie Ascorbinäure (ascorbic acid, AA), welche Proteine und Nukleinsäuren vor oxidativer Schädigung schützen können. Auch andere Nachtschattengewächse sind für ihre Gehalte an Antioxidanzien bekannt. Toor et al. [2] zeigten für Tomaten eine antioxidative Eigenschaft, die teilweise auf dem Ascorbinsäure-Gehalt beruht. Auch für Kapstachelbeeren [3], Peperoni [4, 5] und verschiedene Sorten der Aubergine [6] wurden antioxidative Eigenschaften nachgewiesen.

Goji berries from the Solanacea family are used in traditional Chinese medicine for their bioactive compounds, mostly antioxidants like ascorbic acid. Recently, an ascorbic acid analogue from goji, the 2-O-β-D-glucopyranosyl- L-ascorbic acid has been reported. In rats, this analogue is absorbed intact and as free ascorbic acid and has been consequently proposed as provitamin C. Since synthesis of the analogue is not promising, reliable natural sources are searched. However, knowledge concerning the analogue’s occurrence in other Solanacea fruits is lacking. In the present study, the presence of the analogue is evaluated in cherry tomatoes, cape gooseberries, different eggplants, and green chili peppers. Surprisingly, the analogue was found in all fruits investigated, but in considerably lower contents when compared to goji berries. For the first time, the presence of 2-O-β-D-glucopyranosyl- L-ascorbic acid is confirmed in fruits from the Solanacea family, other than goji berries.


Keywords:
Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEI-VS
Institute:
Institut Technologies du vivant
Date:
2020-01
Pagination:
4 p.
Published in:
Ernährungs Umschau
Numeration (vol. no.):
2020, vol. 67, no. 8, pp. 156-159
DOI:
Appears in Collection:



 Record created 2021-04-14, last modified 2021-05-17

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