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Lactobacillus Strains Alleviated Aging Symptoms and Aging-Induced Metabolic Disorders in Aged Rats
HOR YAN YAN,Cheong-Hwa Ooi,Boon-Yin Khoo,Sy-Bing Choi,Azman Seeni,Shaharum Shamsuddin,Chern-Ein Oon,Kee-Leong Ong,정우식,Min-Tze Liong 한국식품영양과학회 2019 Journal of medicinal food Vol.22 No.1
Aging is an inevitable and ubiquitous progress that affects all living organisms. A total of 18 strains of lactic acid bacteria (LAB) were evaluated on the activation of adenosine monophosphate-activated protein kinase (AMPK), an intracellular energy sensor mediating lifespan extension. The cell-free supernatant (CFS) of Lactobacillus fermentum DR9 (LF-DR9), Lactobacillus paracasei OFS 0291 (LP-0291), and Lactobacillus helveticus OFS 1515 (LH-1515) showed the highest activation of AMPK and was further evaluated. The phosphorylation of AMPK by these three LAB strains was more evident in U2OS and C2C12 cells, compared to the other cell lines and control (P < .05). Using premature senescent Sprague-Dawley rats induced by D-galactose (D-gal), the administration of LAB (10 log CFU/rat/day) for 12 weeks prevented the shortening of telomere length in D-gal-treated rats compared to the untreated control (P < .05). LF-DR9 lowered gene expression of p53, a known senescent biomarker, in gastrocnemius muscle and tibia compared to the control. The selected LAB strains also enhanced lipid, renal, and liver profile of rats, suggesting added potential of the strains in preventing aging-induced metabolic diseases. Strain LP-0291 and LH-1515 showed ability to adhere to mucin, no antibiotic resistance, tolerated and proliferated under gastric and intestinal simulated conditions, and inhibited the growth of pathogens Escherichia coli, Staphylococcus aureus, and Staphylococcus epidermidis, comparable to commercial probiotic LF-DR9 and Lactobacillus sakei Probio 65. This study provided an insight into the potential of LAB for exhibiting antisenescence effects, with potentials as new medicinal foods for targeted antiaging therapies.
Teyra Ciwang,Lai Angel Hor Yan,Hsieh Yu-Chien,Shen Jia-Wen,Leung Cynthia 한국다문화교육학회 2024 Multicultural Education Review Vol.16 No.1
The culturally diverse higher education settings is conceptualized to facilitate indigenous university students in Taiwan to establish a deeper connection with and understand the meaning of their ethnic identity. Guided by the ethnic identity development theory and school ethnic-racial socialization framework, we asked two research questions: (1) What racial challenges did indigenous students in Taiwan experience at their colleges? (2) How did students utilize college resources to overcome racial challenges and develop a meaningful sense of ethnic identity? A participatory research approach using narrative inquiry was employed (N = 20). Convenience sampling and thematic analysis were adopted. Six themes emerged. Racial challenges were: (1) intergroup discrimination; (2) internal stratification; (3) ethnic identity confusion. Social resources in higher education were: (4) confronting discrimination together; (5) peer appraisal support and encouragement; (6) multicultural social interactions. Research, practice, and policy implications were discussed.
Probiotics: The Next Dietary Strategy against Brain Aging
Jia-Sin Ong,Lee-Ching Lew,Yan-Yan Hor,Min-Tze Liong 한국식품영양과학회 2022 Preventive Nutrition and Food Science Vol.27 No.1
Owing to their long history of safe use, probiotic microorganisms, typically from the genus Lactobacillus, have long been recognized, especially in traditional and fermented food industries. Although conventionally used for dairy, meat, and vegetable fermentation, the use of probiotics in health foods, supplements, and nutraceuticals has gradually increased. Over the past two decades, the importance of probiotics in improving gut health and immunity as well as alleviating metabolic diseases has been recognized. The new concept of a gut-heart-brain axis has led to the development of various innovations and strategies related to the introduction of probiotics in food and diet. Probiotics influence gut microbiota profiles, inflammation, and disorders and directly impact brain neurotransmitter pathways. As brain health often declines with age, the concept of probiotics being beneficial for the aging brain has also gained much momentum and emphasis in both research and product development. In this review, the concept of the aging brain, different in vivo aging models, and various aging-related benefits of probiotics are discussed.
Fabrication of a Pb-Sn Nanowire Array Gas Sensor Using a Novel High Vacuum Die Casting Technique
Chin-Guo Kuo,Ho Chang,Lih-Ren Hwang,Shu Hor,Jia-Shin Chen,Guo-yan Liu,Sheng-Cheng Cheng 대한금속·재료학회 2013 ELECTRONIC MATERIALS LETTERS Vol.9 No.4
In this study, an anodic aluminum oxide nanomold was obtained by etching on an aluminum substrate at a purity of 99.7% with an oxalic acid electrolyte. After etching, a nanomold was prepared with pores that were measured at 80 nm in diameter. This nanomold was used as a base. Using the vacuum casting method,the Pb-Sn alloy was die-cast into the nanomold and consequently shaped into a Pb-Sn alloy nanowire of 80 nm in diameter and 50 μm in length. After solidification, a Pb-Sn nanowire array was obtained. The array of Pb-Sn nanowires prepared in this study can be applied to a gas sensor. Microstructural analysis of the AAO nanomold and the Pb-Sn nanowire array are performed by SEM and XRD.