Kaori Kobayashi

Dr. Kaori Kobayashi


Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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21 July 2023 in Foods
Verified
Journal Article
Open access
PDF file
KKKaori Kobayashi
Kaori Kobayashi
XWXiaohui Wang
Xiaohui Wang
Weiqun WangWeiqun Wang
Weiqun Wang
While nearly one in nine people in the world deals with hunger, one in eight has obesity, and all face the threat of climate change. The production of rice, an important cereal crop and staple food for most of the world’s population, faces challenges due to climate change, the increasing global population, and the simultaneous prevalence of hunger and obesity worldwide. These issues could be addressed at least in part by genetically modified rice. Genetic engineering has greatly developed over the century. Genetically modified rice has been approved by the ISAAA’s GM approval database as safe for human consumption. The aim behind the development of this rice is to improve the crop yield, nutritional value, and food safety of rice grains. This review article provides a summary of the research data on genetically modified rice and its potential role in improving the double burden of malnutrition, primarily through increasing nutritional quality as well as grain size and yield. It also reviews the potential health benefits of certain bioactive components generated in genetically modified rice. Furthermore, this article discusses potential solutions to these challenges, including the use of genetically modified crops and the identification of quantitative trait loci involved in grain weight and nutritional quality. Specifically, a quantitative trait locus called grain weight on chromosome 6 has been identified, which was amplified by the Kasa allele, resulting in a substantial increase in grain weight and brown grain. An overexpressing a specific gene in rice, Oryza sativa plasma membrane H+-ATPase1, was observed to improve the absorption and assimilation of ammonium in the roots, as well as enhance stomatal opening and photosynthesis rate in the leaves under light exposure. Cloning research has also enabled the identification of several underlying quantitative trait loci involved in grain weight and nutritional quality. Finally, this article discusses the increasing threats of climate change such as methane–nitrous oxide emissions and global warming, and how they may be significantly improved by genetically modified rice through modifying a water-management technique. Taken together, this comprehensive review will be of particular importance to the field of bioactive components of cereal grains and food industries trying to produce high-quality functional cereal foods through genetic engineering.

5 February 2025 in Foods
Verified
Journal Article
Open access
PDF file
KKKaori Kobayashi
Kaori Kobayashi
Md SuzauddulaMd Suzauddula
Md Suzauddula
RBRyan Bender
Ryan Bender
CLCheng Li
Cheng Li
Yonghui LiYonghui Li
Yonghui Li
Weiqun WangWeiqun Wang
Weiqun Wang
This review examines existing studies on wheat bran extracts (WBEs) to provide an overview of their functional properties, including antioxidant and enzyme-inhibitory activities, highlighting their potential as natural alternatives for applications in both the food and cosmetic industries. Despite variations in extraction techniques, WBEs consistently demonstrated a significant presence of phenolic compounds and antioxidant activity. In the food industry, WBEs are valued for their nutritional richness, including dietary fiber, proteins, and bioactive compounds such as arabinoxylans. These compounds improve food texture, stability, and baking properties. Additionally, WBEs have demonstrated antimicrobial potential, enhanced product quality, and serve as natural preservatives. Furthermore, WBEs exhibit significant inhibitory effects against collagenase and elastase, suggesting promising anti-aging potential. In the cosmetics sector, WBEs have gained attention due to their emulsion stability, skin-whitening properties, antimicrobial effects, and antioxidant capacities. They have the potential to enhance the stability of cosmetic emulsions, improve skin hydration, and inhibit enzymes linked to skin aging, positioning WBEs as potentially natural alternatives to synthetic ingredients in skincare and anti-aging products. Our recent pilot study also supports that WBEs enhance antioxidant defenses against oxidative stress in rats, highlighting their potential role in anti-aging interventions. To further elucidate the efficacy and bioavailability of the beneficial bioactive compounds in WBEs for both food and cosmetic applications, more comprehensive in vivo studies are required in the future.

21 September 2024 in Foods
Verified
Journal Article
Open access
PDF file
Md SuzauddulaMd Suzauddula
Md Suzauddula
KKKaori Kobayashi
Kaori Kobayashi
SPSunghun Park
Sunghun Park
XSXiuzhi Susan Susan Sun
Xiuzhi Susan Susan Sun
Weiqun WangWeiqun Wang
Weiqun Wang
Colorectal cancer (CRC) remains a significant global health challenge, with barriers to effective prevention and treatment including tumor recurrence, chemoresistance, and limited overall survival rates. Anthocyanins, known for their strong anti-cancer properties, have shown promise in preventing and suppressing various cancers, including CRC. However, natural sources of anthocyanins often fail to provide sufficient quantities needed for therapeutic effects. Bioengineered crops, particularly anthocyanin-enriched tomatoes, offer a viable solution to enhance anthocyanin content. Given its large-scale production and consumption, tomatoes present an ideal target for bioengineering efforts aimed at increasing dietary anthocyanin intake. This review provides an overview of anthocyanins and their health benefits, elucidating the mechanisms by which anthocyanins modulate the transcription factors involved in CRC development. It also examines case studies demonstrating the successful bioengineering of tomatoes to boost anthocyanin levels. Furthermore, the review discusses the effects of anthocyanin extracts from bioengineered tomatoes on CRC prevention, highlighting their role in altering metabolic pathways and reducing tumor-related inflammation. Finally, this review addresses the challenges associated with bioengineering tomatoes and proposes future research directions to optimize anthocyanin enrichment in tomatoes.

13 September 2025 in Nutrients
Verified
Journal Article
Open access
PDF file
KKKaori Kobayashi
Kaori Kobayashi
KSKeshari Sudasinghe
Keshari Sudasinghe
RBRyan Bender
Ryan Bender
Md SuzauddulaMd Suzauddula
Md Suzauddula
CLCheng Li
Cheng Li
Weiqun WangWeiqun Wang
Weiqun Wang
Background/Objectives: Wheat bran is known for its anti-aging effects, primarily due to its antioxidant properties. Our previous study identified novel antioxidants in wheat bran (xylo-oligosaccharides and protein hydrolysates) using an innovative extraction method. However, the anti-aging potential of these wheat bran extracts (WBEs) remains unclear. Methods: This study evaluated the anti-aging effects of WBE in a D-galactose-induced aging model using Wistar rats. Animals were divided into four groups: (1) saline-injected control, (2) D-galactose-injected control, (3) D-galactose + 5% WBE, and (4) D-galactose + 10% WBE. After six weeks, body weight, food intake, body fat percentage, erythrocyte superoxide dismutase (SOD) activity, and liver senescence-associated β-galactosidase (SA-β-gal) levels were assessed. Results: D-galactose significantly reduced food intake in positive control 87 ± 21%/weekly (negative control; p < 0.05, 107 ± 20%/weekly for 10%WBE; p < 0.01. Body fat percentage (positive control: 84 ± 19% vs. 5% WBE: 110 ± 20%, p < 0.05 in 100% convert). It also lowered erythrocyte SOD activity; 68.6 ± 9%, p < 0.01 in 100% conversion). WBE supplementation restored SOD activity in a dose-dependent manner (5% WBE: 32,479 ± 12,773 U/mL; 10% WBE: 42,368 ± 20,281 U/mL. Although D-galactose did not elevate significantly SA-β-gal activity in the liver, WBE supplementation still led to a dose-dependent reduction in baseline SA-β-gal levels (294 ± 84 nmol/min/mg protein vs. 5% WBE: 181 ± 65 nmol/min/mg protein, and 10% WBE: 146 ± 40 nmol/min/mg protein. p < 0.001). No significant group differences were found in hepatic SOD2, catalase (liver and skin), or telomerase reverse transcriptase expression. Conclusions: These findings suggest that wheat bran extracts mitigate D-galactose-induced oxidative stress in circulation, indicating potential anti-aging benefits. However, their effects at the tissue level remain inconclusive. Further studies are needed to explore molecular mechanisms and refine intervention duration.