Wheat sprout extract induces changes on 20S proteasomes functionality

Area of Science:

• Biochemistry
• Molecular Biology
• Plant Science

Background:

• Wheat sprouts are rich in polyphenols with documented antioxidant properties.
• Polyphenols, like epigallocatechin-3-gallate, can modulate 20S proteasome activity.
• The 20S proteasome plays a crucial role in cellular protein degradation and homeostasis.

Purpose of the Study:

• To investigate the impact of wheat sprout extracts on 20S proteasome functionality.
• To identify and quantify polyphenols within wheat sprout extracts.
• To assess the effects of wheat sprout extracts on proteasome activity in cancer cells.

Main Methods:

• Polyphenolic content of wheat sprout extracts analyzed using Folin-Ciocalteau reagent and RP-HPLC.
• Isolated 20S proteasomes treated with wheat sprout extract to assess enzyme activity (ChT-L, T-L, PGPH, BrAAP).
• Human colon adenocarcinoma (Caco) cells treated with extract to evaluate proteasome activity and protein expression.

Main Results:

• Wheat sprout extract gradually inhibited all tested 20S proteasome activities.
• Low extract concentrations showed minor activation of specific proteasome components.
• Extract treatment reduced beta-casein degradation and attenuated TPA-induced proteasome activation in Caco cells.
• Wheat sprout extract affected pro-apoptotic protein expression levels.

Conclusions:

• Wheat sprout extracts possess potent 20S proteasome inhibitory properties.
• The extract modulates proteasome activity in both isolated enzymes and cancer cells.
• Wheat sprout extract demonstrates potential as a modulator of cellular processes relevant to cancer therapy.