TY - JOUR
T1 - Comparative effects of vacuum or conventional frying on the polyphenol chemistry and in vitro colon cancer stem cell inhibitory activity of purple-flesh potatoes
AU - Stewart, Lauriel
AU - Indukuri, Vijaya Varma
AU - Charepalli, Venkata
AU - Chrisfield, Benjamin J.
AU - Anantheswaran, Ramaswamy C.
AU - Lambert, Joshua D.
AU - Vanamala, Jairam K.P.
N1 - Funding Information:
The authors thank the Penn State Metabolomics Facility and Drs. Philip Smith and Andrew Patterson for technical assistance in performing UPLC–MS analysis of individual phenolic compounds. The authors thank the staff of the Russell E. Larson Agricultura Research Center for assistance in growing potatoes for this study. This work was supported in part by USDA Hatch Project No. PEN4565.
Funding Information:
The authors thank the Penn State Metabolomics Facility and Drs. Philip Smith and Andrew Patterson for technical assistance in performing UPLC–MS analysis of individual phenolic compounds. The authors thank the staff of the Russell E. Larson Agricultura Research Center for assistance in growing potatoes for this study. This work was supported in part by USDA Hatch Project No. PEN4565.
Publisher Copyright:
© 2022 Institute of Food Technologists®.
PY - 2022/7
Y1 - 2022/7
N2 - Abstract: Potatoes are an important food crop that undergo postharvest storage, reconditioning, and cooking. Colored-flesh varieties of potatoes are rich in phenolic acids and anthocyanins. Previous studies have suggested that purple-flesh potatoes can inhibit colon cancer cells in vitro and reduce colon carcinogenesis in vivo. Vacuum frying (VF), as an alternative to conventional frying (CF), reduces fat content and may promote polyphenol retention in potato chips. We examined the impacts of reconditioning (storing at 13°C for 3 weeks following the 90-day cold storage at 7°C) and frying method on phenolic chemistry and in vitro colon cancer stem cell (CCSC) inhibitory activity of purple-flesh potato chips. We found that reconditioned chips exhibited higher total phenolic content (TPC) than nonreconditioned chips. We found that VF chips had lower TPC than CF chips. We observed no interaction between treatments. We found that VF chips had 27% higher total monomeric anthocyanin levels than CF chips, and observed a significant interaction between treatments. We found that VF chips had higher concentrations of caffeic acid (42%–72% higher), malvidin (46%–98% higher), and pelargonidin (55%–300% higher) than CF chips. We found that reconditioning had no effect. We found that VF chips had greater in vitro CCSC inhibitory activity than CF chips. Our results suggest that VF can improve the phytochemical profile and health-related functionality of purple-flesh potato chips, but additional studies are needed to determine if these results translate to the in vivo situation. Practical Application: Our current study shows that vacuum frying of purple-flesh potato chips results in higher levels of total monomeric anthocyanins and concentrations of specific polyphenols as compared to chips produced by conventional frying. These differences correlated with better in vitro colon cancer stem cell inhibitory activity. Although additional in vivo studies are needed, our current results suggest that it may be possible for potato processors to improve the health-related functionality of purple-flesh potato chips through the use of vacuum frying.
AB - Abstract: Potatoes are an important food crop that undergo postharvest storage, reconditioning, and cooking. Colored-flesh varieties of potatoes are rich in phenolic acids and anthocyanins. Previous studies have suggested that purple-flesh potatoes can inhibit colon cancer cells in vitro and reduce colon carcinogenesis in vivo. Vacuum frying (VF), as an alternative to conventional frying (CF), reduces fat content and may promote polyphenol retention in potato chips. We examined the impacts of reconditioning (storing at 13°C for 3 weeks following the 90-day cold storage at 7°C) and frying method on phenolic chemistry and in vitro colon cancer stem cell (CCSC) inhibitory activity of purple-flesh potato chips. We found that reconditioned chips exhibited higher total phenolic content (TPC) than nonreconditioned chips. We found that VF chips had lower TPC than CF chips. We observed no interaction between treatments. We found that VF chips had 27% higher total monomeric anthocyanin levels than CF chips, and observed a significant interaction between treatments. We found that VF chips had higher concentrations of caffeic acid (42%–72% higher), malvidin (46%–98% higher), and pelargonidin (55%–300% higher) than CF chips. We found that reconditioning had no effect. We found that VF chips had greater in vitro CCSC inhibitory activity than CF chips. Our results suggest that VF can improve the phytochemical profile and health-related functionality of purple-flesh potato chips, but additional studies are needed to determine if these results translate to the in vivo situation. Practical Application: Our current study shows that vacuum frying of purple-flesh potato chips results in higher levels of total monomeric anthocyanins and concentrations of specific polyphenols as compared to chips produced by conventional frying. These differences correlated with better in vitro colon cancer stem cell inhibitory activity. Although additional in vivo studies are needed, our current results suggest that it may be possible for potato processors to improve the health-related functionality of purple-flesh potato chips through the use of vacuum frying.
UR - http://www.scopus.com/inward/record.url?scp=85131594491&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85131594491&partnerID=8YFLogxK
U2 - 10.1111/1750-3841.16210
DO - 10.1111/1750-3841.16210
M3 - Article
C2 - 35673890
AN - SCOPUS:85131594491
SN - 0022-1147
VL - 87
SP - 3260
EP - 3267
JO - Journal of Food Science
JF - Journal of Food Science
IS - 7
ER -