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Koizumi T, Fujimoto A, Kawaguchi H, Kurosaki T, Kitamura A. Stress Granule Dysfunction via Chromophore-Associated Light Inactivation. ACS Omega 2024; 9:21298-21306. [PMID: 38764671 PMCID: PMC11097178 DOI: 10.1021/acsomega.4c01469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 04/17/2024] [Accepted: 04/23/2024] [Indexed: 05/21/2024]
Abstract
Stress granules (SGs) are cytoplasmic condensates composed of various proteins and RNAs that protect translation-associated machinery from harmful conditions during stress. However, the method of spatiotemporal inactivation of condensates such as SGs in live cells to study cellular phenotypes is still in the process of being demonstrated. Here, we show that the inactivation of SGs by chromophore-associated light inactivation (CALI) using a genetically encoded red fluorescence protein (SuperNova-Red) as a photosensitizer leads to differences in cell viability during recovery from hyperosmotic stress. CALI delayed the disassembly kinetics of SGs during recovery from hyperosmotic stress. Consequently, CALI could inactivate the SGs, and the cellular fate due to SGs could be analyzed. Furthermore, CALI is an effective spatiotemporal knockdown method for intracellular condensates/aggregates and would contribute to the elucidation of importance of such condensates/aggregates.
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Affiliation(s)
- Takumi Koizumi
- Laboratory
of Cellular and Molecular Sciences, Graduate School of Life Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Ai Fujimoto
- Laboratory
of Cellular and Molecular Sciences, Graduate School of Life Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Haruka Kawaguchi
- Laboratory
of Cellular and Molecular Sciences, Graduate School of Life Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Tsumugi Kurosaki
- Laboratory
of Cellular and Molecular Sciences, Graduate School of Life Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Akira Kitamura
- Laboratory
of Cellular and Molecular Sciences, Faculty of Advanced Life Science, Hokkaido University, Sapporo 001-0021, Japan
- PRIME, Japan
Agency for Medical Research and Development, Chiyoda-ku, Tokyo 100-004, Japan
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Hu D, Maeno N, Minami N, Takahashi S, Yoshida K, Ohtani K, Funatsu Y, Kondo R, Yamaguchi A. Antifungal activities of vineyard-habitat wild yeast for grape gray-mold disease and its effects on spontaneous winemaking. Antonie Van Leeuwenhoek 2024; 117:27. [PMID: 38261019 DOI: 10.1007/s10482-023-01922-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Accepted: 12/20/2023] [Indexed: 01/24/2024]
Abstract
Microorganisms, including native yeasts, are abundant in vineyard fields. Herein, we studied the possibility of using vineyard-derived wild yeast as a microbial pesticide against Botrytis cinerea, a pathogen that causes grape gray mold disease, to boost the initial alcohol production of spontaneously fermented wine. We identified the Saccharomyces cerevisiae strain KONDO170908, which showed the most effective antifungal activity in an ex vivo yeast dripping experiment on grape berries. This strain was utilized in an in vivo spray test on grape bunches in vineyard fields and was proven to significantly suppress gray mold disease on the grape berries in test plot #16 when the yeast was sprayed during both the flowering and ripening periods (morbidity 11.2% against 15.3% of the control plot, χ2 test, p < 0.0001). However, in test plot #17, spraying the yeast during only the ripening period had no effect (morbidity 16.3%). The grapes from each test plot were also submitted for spontaneous wine fermentation. Alcoholic fermentation of the grapes from test plot #16 provided the most active bubbling of CO2 gas and the highest ethanol production and colony counts over seven days of fermentation. Unique changes in the different strains of S. cerevisiae among the plots were observed throughout the early fermentation stage. Thus, yeast spraying during the flowering period might trigger modification of the entire microbiota and could ultimately contribute to promoting alcohol production in the spontaneously fermented wine, although it decreased the grape yield by 20%.
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Affiliation(s)
- Dagula Hu
- Department of Food Science and Human Wellness, Rakuno Gakuen University, Midorimachi 582, Bunkyodai, Ebetsu-shi, Hokkaido, 069-8501, Japan
- Grass Industry Collaborative Innovation Research Center, Hulunbuir University, Hulunbuir, Inner Mongolia, China
| | - Naoko Maeno
- Department of Food Science and Human Wellness, Rakuno Gakuen University, Midorimachi 582, Bunkyodai, Ebetsu-shi, Hokkaido, 069-8501, Japan
| | - Noriko Minami
- Department of Food Science and Human Wellness, Rakuno Gakuen University, Midorimachi 582, Bunkyodai, Ebetsu-shi, Hokkaido, 069-8501, Japan
| | - Soichiro Takahashi
- Department of Food Science and Human Wellness, Rakuno Gakuen University, Midorimachi 582, Bunkyodai, Ebetsu-shi, Hokkaido, 069-8501, Japan
| | - Kuniko Yoshida
- Department of Food Science and Human Wellness, Rakuno Gakuen University, Midorimachi 582, Bunkyodai, Ebetsu-shi, Hokkaido, 069-8501, Japan
| | - Katsuki Ohtani
- Department of Food Science and Human Wellness, Rakuno Gakuen University, Midorimachi 582, Bunkyodai, Ebetsu-shi, Hokkaido, 069-8501, Japan
| | - Yasuhiro Funatsu
- Department of Food Science and Human Wellness, Rakuno Gakuen University, Midorimachi 582, Bunkyodai, Ebetsu-shi, Hokkaido, 069-8501, Japan
| | - Ryosuke Kondo
- Kurisawa Wines, Moseushi 774-2, Kurisawacho, Iwamizawa-shi, Hokkaido, 068-0114, Japan
| | - Akihiro Yamaguchi
- Department of Food Science and Human Wellness, Rakuno Gakuen University, Midorimachi 582, Bunkyodai, Ebetsu-shi, Hokkaido, 069-8501, Japan.
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Satoh N, Tanno T, Kitabayashi T, Kiba T, Kawamura M, Abe Y. CaF 2/ZnS Multilayered Films on Top-Emission Organic Light-Emitting Diode for Improving Color Purity and Moderation of Dark-Spot Formation. ACS Omega 2022; 7:17861-17867. [PMID: 35664609 PMCID: PMC9161256 DOI: 10.1021/acsomega.2c01128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
Organic light-emitting diodes (OLEDs) have been widely used, particularly in display applications. OLEDs are easily degraded without stringent encapsulation owing to their susceptibility to water vapor and oxygen. Therefore, establishing an effective protection method for these devices is essential. In this study, we demonstrate the device protection performance and improvement in color purity by introducing CaF2/ZnS multilayered films on a top-emitting inverted-type OLED (iOLED), which was originally intended to act as a distributed Bragg reflector (DBR). To test the protection performance of each dielectric layer, conventional bottom-emitting OLEDs (cOLEDs) with and without single layers of CaF2 and ZnS were investigated for comparison. All OLEDs were stored in an atmosphere without stringent encapsulation, such as a cover glass. The luminescence area of cOLEDs without the dielectric film decreased by more than 90% after 3 days of fabrication. In contrast, the dark-spot formation was moderated after the same period for the dielectric single-layer deposited cOLEDs. Notably, the iOLED with DBR completely preserved the emitting area even after 2 months of fabrication. This suggests that DBR acted as a protective film for the organic layer, whereas the inverted structure also contributed to reducing the degradation of air- and moisture-sensitive materials.
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Nishimura K, Ijiri D, Shimamoto S, Takaya M, Ohtsuka A, Goto T. Genetic effect on free amino acid contents of egg yolk and albumen using five different chicken genotypes under floor rearing system. PLoS One 2021; 16:e0258506. [PMID: 34624067 PMCID: PMC8500412 DOI: 10.1371/journal.pone.0258506] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 09/28/2021] [Indexed: 01/24/2023] Open
Abstract
Chicken eggs play an important role as food resources in the world. Although genetic effects on yolk and albumen contents have been reported, the number of chicken genotypes analyzed so far is still limited. To investigate the effect of genetic background on 10 egg traits, 19 yolk amino acid traits, and 19 albumen amino acid traits, we evaluated a total of 58 eggs from five genotypes: two Japanese indigenous breeds (Ukokkei and Nagoya) and three hybrids (Araucana cross, Kurohisui, and Boris Brown) under a floor rearing system. One-way ANOVA revealed significant effects of genotype on 10 egg traits, 8 yolk amino acids (Asp, Glu, Ser, Gly, Thr, Tyr, Cys, and Leu), and 11 albumen amino acids (Asp, Glu, Asn, Ser, Gln, His, Ala, Tyr, Trp, Phe, and Ile) contents. Moderate to strong positive phenotypic correlations among traits within each trait category (size and weight traits, yolk amino acid traits, and albumen amino acid traits), whereas there were basically no or weak correlations among the trait categories. However, a unique feature was found in the Araucana cross indicating moderate positive correlations of amino acids between yolk and albumen. These results suggest that genetic factors can modify not only the size and weight of the egg and eggshell color but also yolk and albumen free amino acids contents.
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Affiliation(s)
- Kenji Nishimura
- Department of Life and Food Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan
| | - Daichi Ijiri
- Department of Biochemical Science and Technology, Kagoshima University, Korimoto, Kagoshima, Japan
| | - Saki Shimamoto
- Department of Biochemical Science and Technology, Kagoshima University, Korimoto, Kagoshima, Japan
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Masahiro Takaya
- Department of Life and Food Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan
- Hokkaido Tokachi Area Regional Food Processing Technology Center, Tokachi Foundation, Obihiro, Japan
| | - Akira Ohtsuka
- Department of Biochemical Science and Technology, Kagoshima University, Korimoto, Kagoshima, Japan
| | - Tatsuhiko Goto
- Department of Life and Food Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan
- Research Center for Global Agromedicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan
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