scholarly journals Comparison of forage yield, silage fermentative quality, anthocyanin stability, antioxidant activity, and in vitro rumen fermentation of anthocyanin-rich purple corn (Zea mays L.) stover and sticky corn stover

2018 ◽  
Vol 17 (9) ◽  
pp. 2082-2095 ◽  
Author(s):  
Xing-zhou TIAN ◽  
Pramote Paengkoum ◽  
Siwaporn Paengkoum ◽  
Sorasak Thongpea ◽  
Chao BAN
Keyword(s):  
Antioxidant Activity ◽  
Zea Mays ◽  
Corn Stover ◽  
Zea Mays L ◽  
Rumen Fermentation ◽  
Forage Yield ◽  
Purple Corn ◽  
Anthocyanin Stability ◽  
In Vitro Rumen Fermentation

scholarly journals Evaluation of the in vitro and in vivo antihypertensive effect and antioxidant activity of blue corn hydrolysates derived from wet-milling//Evaluación del efecto antihipertensivo in vitro e in vivo y actividad antioxidante del hidrolizado de maíz azul derivado de la molienda húmeda

Biotecnia ◽  
2020 ◽  
Vol 22 (2) ◽  
pp. 155-162 ◽  
Author(s):  
Alvaro Montoya-Rodríguez ◽  
Evelyn Isabel Osuna-Gallardo ◽  
Francisco Cabrera-Chávez ◽  
Jorge Milán-Carrillo ◽  
Cuauhtémoc Reyes-Moreno ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Antioxidant Activity ◽  
Zea Mays ◽  
Antihypertensive Effect ◽  
Zea Mays L ◽  
Enzymatic Digestion ◽  
Wet Milling ◽  
Food Ingredient

Hypertension is considered a risk factor for coronary heart disease, and its prevalence has increased substantially. Inhibition of angiotensin-converting enzyme (ACE-I) is key to lower blood pressure, making it an excellent treatment for hypertension. Corn (Zea mays L.) is an important source of bioactive peptides with potential anti-hypertensive activity related to ACE-I inhibition. These peptides can be obtained through the hydrolysis of corn gluten meal (CGM), as wetmilling by-products. The aim was to evaluate the in vitro and in vivo ACE-I inhibitory activity of blue CGM hydrolysates. Enzymatic digestion in vitro of blue CGM was conducted at different times. Hydrolysis for 360 min significantly increased both soluble protein and antioxidant activity by 4 and 8-fold respectively, the maximum ACE-I inhibition (94.3 %) was observed with 260 min hydrolysate. Mice were treated with the blue CGM hydrolysate (260 min), captopril or PBS to test the bioavailability in vivo. The CGM hydrolysate was detected in serum after 5 and up to 30 min after ingestion, showing the maximum ACE-I inhibitory capacity (59 %) during the first 15 min. Overall, this work showed that the blue CGM hydrolysate could serve as a functional food ingredient with antihypertensive effect due to its blood pressure-lowering peptides.RESUMENLa hipertensión es factor de riesgo en enfermedades coronarias, y su prevalencia ha aumentado sustancialmente. La inhibición de enzima convertidora de angiotensina (ECA) es clave para disminuir presión arterial, y excelente tratamiento para hipertensión. El maíz (Zea mays L.) es fuente de péptidos bioactivos con actividad antihipertensiva por inhibición de ECA. Péptidos pueden obtenerse por hidrólisis de harina de gluten de maíz (HGM), como subproducto de molienda húmeda. El objetivo fue evaluar in vitro e in vivo actividad inhibitoria de ECA en hidrolizados de HGM azul. La digestión enzimática in vitro de HGM fue conducida a diferentes tiempos. La hidrólisis por 360 min aumento significativamente proteína soluble y actividad antioxidante de 4 y 8 veces, respectivamente; la máxima inhibición de ECA (94.3 %) fue observada a 260 minutos del hidrolizado. Ratones fueron tratados con HGM hidrolizado (260 minutos), captopril o PBS para evaluar biodisponibilidad in vivo. Después de la ingestión, HGM hidrolizado fue detectado en suero en 5 hasta 30 minutos, mostrando máxima inhibición de ECA (59 %) durante los primeros 15 minutos. En general, este trabajo mostró que hidrolizado de HGM podría servir como ingrediente funcional en alimentos con efecto antihipertensivo debido a péptidos reductores de presión arterial.

scholarly journals Primary and Phenolic Metabolites Analyses, In Vitro Health-Relevant Bioactivity and Physical Characteristics of Purple Corn (Zea mays L.) Grown at Two Andean Geographical Locations

Metabolites ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 722
Author(s):  
Lena Gálvez Ranilla ◽  
Briggite Anyela Rios-Gonzales ◽  
María Fernanda Ramírez-Pinto ◽  
Claudia Fuentealba ◽  
Romina Pedreschi ◽  
...  
Keyword(s):  
Zea Mays ◽  
Antioxidant Capacity ◽  
Inhibitory Activity ◽  
Zea Mays L ◽  
Physical Characteristics ◽  
Stress Factors ◽  
Total Phenolic ◽  
Aconitic Acid ◽  
Purple Corn

Purple corn (Zea mays L.) is native to the Andean region, but limited research has been performed about the potential metabolic variability when grown under Andean environmental conditions. This study was aimed at evaluating the phenolic and primary polar metabolites composition of purple corn (kernels and cobs) grown at two Peruvian Andean locations (lowland and highland) using targeted UHPLC (ultra-high-performance liquid chromatography) and untargeted GC-MS (gas chromatography mass spectrometry) metabolomic platforms, respectively. Changes in the physical characteristics and the in vitro bioactivity were also determined. Purple corn from the highland zone showed higher contents of ash, crude fiber, total phenolic contents, DPPH (2,2-diphenyl-1-picrylhydrazyl) antioxidant capacity, and α-amylase inhibitory activity in kernels, whereas increased levels of flavonoids (anthocyanins and quercetin derivatives) and ABTS [2,2ʹ-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)] antioxidant capacity were observed in cobs in comparison to lowland samples. No effect of the Andean location was found on the α-glucosidase inhibitory activity relevant for hyperglycemia management, while yield-linked physical characteristics were high in purple corn grown at the lowland zone. Polar primary metabolites related to the carbohydrate (monosaccharides, sucrose, and d-sorbitol), amino acid (valine and alanine), and tricarboxylic acid cycle (succinic, fumaric, and aconitic acid) metabolism were higher in highland purple corn (cob and kernel) likely due to abiotic stress factors from the highland environment. This study provides the foundation for further breeding improvements at Andean locations.

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