Dandelion Leaves Boost Brain-protective Compounds After Digestion

A communal chaotic works whitethorn clasp hidden encephalon benefits. Dandelion leafage polyphenols past digestion and proceed targeting pathways associated pinch Alzheimer’s disease. 

Study: Characterisation of Dandelion Polyphenols and Their In Vitro Neuroprotective Effects During Simulated Digestion. Image credit: DUSAN ZIDAR/Shutterstock.com

A caller study in Foods examined nan enzyme-targeted neuroprotective imaginable of polyphenols from dandelion flowers, roots, and leaves during successful vitro simulated digestion.

Pathological mechanisms and nan constricted therapeutics

Neurodegenerative diseases specified arsenic Alzheimer’s illness (AD) and Parkinson’s illness correspond 1 of nan astir pressing challenges successful modern medicine. These diseases are characterized by progressive nonaccomplishment of neuronal building and function, starring to irreversible cognitive and centrifugal decline.

A cardinal system successful AD pathogenesis involves nan progressive nonaccomplishment of cholinergic neurons and nan resulting diminution successful encephalon acetylcholine (ACh) levels. This process is accelerated by elevated acetylcholinesterase (AChE) activity, nan enzyme that hydrolyzes ACh.

Beyond AChE, lipoxygenase (LOX) and reactive nitrogen type (RNS) are besides involved. A dysregulated LOX activity promotes neuroinflammation, while RNS accumulation nether oxidative accent tin trigger neuronal death.

As world populations age, prevalence rates of neurodegenerative diseases are rising sharply. Despite decades of research, disease-modifying therapies stay difficult to achieve, and existent pharmacological approaches mostly negociate symptoms alternatively than addressing underlying pathology. This has intensified liking successful people derived compounds arsenic complementary aliases preventive strategies.

Polyphenols are among nan astir biologically progressive works metabolites pinch reported neuroprotective effects. While digestion mostly reduces phenolic content, immoderate fractions summation astatine circumstantial stages and clasp post-digestive enzyme-inhibitory activity, specified arsenic inhibition of AChE, highlighting their imaginable functional relevance aft digestion and nan value of studying them successful food-relevant conditions.

Assessing nan neuroprotective functions of dandelion

Dandelion (Taraxacum officinale), wide utilized successful accepted medicine, is simply a rich | root of flavonoids and phenolic acids, making it a compelling taxable for neuroprotection research. This study investigates polyphenol content, phenolic composition, and enzyme-targeted neuroprotective activity crossed different anatomical parts of nan dandelion to measure its imaginable arsenic a neuroprotective functional nutrient ingredient.

The authors harvested and air-dried dandelions from Yuncheng, China, successful March 2023. Dried flowers, roots, and leaves were crushed and sieved, and polyphenols were extracted utilizing a modular protocol. Total Polyphenol Content (TPC) and Total Flavonoid Content (TFC) were estimated. Researchers besides wished and quantified individual polyphenols.

The enzyme-inhibitory and antioxidant-related neuroprotective effects of dandelion polyphenols were assessed successful vitro, and a simulated digestion exemplary was utilized to measure their behaviour during nan oral, gastric, and intestinal phases.

Digestive bioaccessibility of dandelion leafage polyphenols drives superior neuroprotective effect

Dandelion leaves (DL) consistently yielded nan richest polyphenol profile, signaling nan highest full phenolic contented (TPC) of 3986.67 mg GAE/100 g (≈39.87 mg/g) and full flavonoid contented (TFC) of 3250.00 mg RE/100 g (≈32.50 mg/g) among nan 3 works parts examined. Dandelion flowers (DF) classed second, while dandelion roots (DR) contained nan lowest levels of some phenolics and flavonoids.

Beyond full polyphenol content, nan individual phenolic profiles differed markedly crossed works parts. Protocatechuic acerb and chicoric acerb were astir concentrated successful DL, whereas rutin and caffeic acerb accumulated preferentially successful DF.

Ultra-performance liquid chromatography coupled pinch electrospray ionisation quadrupole time-of-flight wide spectrometry (UPLC-ESI-Q-TOF-MS) study of each 3 insubstantial extracts identified 84 compounds crossed 4 chemic subclasses, predominantly phenolic acids. In addition, caffeoylquinic acerb derivatives and hydroxybenzoic acerb derivatives, flavonoids comprising some free aglycones and glycosylated forms, coumarins, and a azygous tannin completed nan profile.

Multivariate study utilizing main constituent study (PCA), partial slightest squares discriminant study (PLS-DA), and hierarchical clustering power maps collectively revealed clear tissue-specific differences successful dandelion metabolite composition. Overall, flavonoids and phenolic acids together dominated nan compound people distribution successful near-equal proportions (~46% each), reinforcing their cardinal domiciled successful defining nan chemic personality of each dandelion tissue.

All 3 dandelion insubstantial extracts inhibited AChE successful a concentration-dependent manner, pinch DL consistently outperforming DF and DR, suggesting that dandelion leafage is simply a promising earthy campaigner for cholinesterase-targeted strategies successful Alzheimer’s illness management. This is apt to impact non-competitive inhibition mechanisms observed pinch works polyphenols.

DL showed nan strongest LOX inhibitory activity, followed by DF and DR. At debased concentrations, DF demonstrated markedly superior RNS scavenging complete DL and DR, suggesting its phenolic creation is peculiarly effective against nitrogen-centred radicals.

TPC accrued modestly during oral digestion, declined nether gastric acidity, past accrued substantially during nan intestinal phase, reaching nan highest levels crossed each samples arsenic hydrolases and bile salts released bound phenolics.

Meanwhile, TFC peaked astatine nan oral stage, declined nether gastric conditions, and partially recovered during nan intestinal phase, pinch DL maintaining nan highest levels throughout. Across each digestion stages, DL consistently released nan highest mixed quantities of full phenols and flavonoids, followed by DF and DR.

Following simulated digestion, each 3 tissues retained measurable but mostly reduced AChE-inhibitory, LOX-inhibitory, and RNS-scavenging activities. AChE inhibition was highest successful nan oral shape and declined progressively done gastric and intestinal stages, pinch reductions partially attributed to structural changes successful phenolic compounds nether digestive conditions and changes successful interactions among phenolic constituents.

LOX inhibition was maintained or, successful immoderate cases (notably DR successful nan intestinal phase), enhanced, reflecting nan merchandise aliases activation of circumstantial phenolics.

RNS scavenging activity remained important crossed each tissues, pinch DF consistently showing nan strongest activity, peculiarly astatine little concentrations, while differences betwixt tissues diminished astatine higher concentrations.

Conclusions

Dandelion leaves were recovered to beryllium nan richest root of phenols and flavonoids, pinch their polyphenols showing notable inhibition of enzymes progressive successful neurodegeneration and inflammation.

Together, these findings propose that dandelion leaves, successful particular, clasp meaningful imaginable arsenic a functional nutrient constituent for supporting neurological wellness and reducing nan consequence of conditions specified arsenic Alzheimer’s disease. Although these findings are based connected successful vitro enzyme assays and simulated digestion models, successful vivo studies are needed to corroborate these outcomes.

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