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Tagorti G, Yalçın B, Güneş M, Burgazlı AY, Kaya B. Comparative evaluation of natural and artificial sweeteners from DNA damage, oxidative stress, apoptosis, to development using Drosophila melanogaster. Drug Chem Toxicol 2024; 47:606-617. [PMID: 37386929 DOI: 10.1080/01480545.2023.2228522] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/23/2023] [Accepted: 06/14/2023] [Indexed: 07/01/2023]
Abstract
The overconsumption of added sugars makes people vulnerable to a myriad of diseases. Several biochemical and developmental assays were performed in the current study to assess the effect of fructose on Drosophila melanogaster and to find substitutes for fructose by comparing it to well-known sweeteners. Drosophila was exposed separately to the same ratio of sugar 9.21% (w/v) of several types of sweeteners (sucrose, fructose, glucose syrup, high-fructose corn syrup and stevia). Results revealed that fructose might induce recombination, whereas stevia lacks genotoxic potential. No developmental delay, growth defects, or neurotoxic effects were recorded for any of the sweeteners. We also observed no striking differences in reactive oxygen species levels. Thus, stevia seems to be an alternative sweetener to fructose that can be consumed to reduce fructose-induced anomalies.
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Affiliation(s)
- Ghada Tagorti
- Department of Biology, Akdeniz University, Antalya, Turkey
| | - Burçin Yalçın
- Department of Biology, Akdeniz University, Antalya, Turkey
| | - Merve Güneş
- Department of Biology, Akdeniz University, Antalya, Turkey
| | | | - Bülent Kaya
- Department of Biology, Akdeniz University, Antalya, Turkey
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Kockel L, Zhang V, Wang J, Gulick C, Laws ME, Rajan A, Lantz N, Asgarova A, Dai L, Garcia K, Kim C, Li M, Ordonez-Acosta P, Peng D, Shull H, Tse L, Wang Y, Yu W, Zhou Z, Rankin A, Park S, Kim SK. CRISPR/Cas9 gene editing in Drosophila via visual selection in a summer classroom. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.28.587232. [PMID: 38585736 PMCID: PMC10996655 DOI: 10.1101/2024.03.28.587232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
CRISPR/Cas9 methods are a powerful in vivo approach to edit the genome of Drosophila melanogaster. To convert existing Drosophila GAL4 lines to LexA driver lines in a secondary school classroom setting, we applied the CRISPR-based genetic approach to a collection of Gal4 'driver' lines. The integration of the yellow+ coat color marker into homology-assisted CRISPR knock-in (HACK) enabled visual selection of Gal4-to-LexA conversions using brightfield stereo-microscopy available in a broader set of standard classrooms. Here, we report the successful conversion of eleven Gal4 lines with expression in neuropeptide-expressing cells into corresponding, novel LexA drivers. The conversion was confirmed by LexA- and Gal4-specific GFP reporter gene expression. This curriculum was successfully implemented in a summer course running 16 hours/week for seven weeks. The modularity, flexibility, and compactness of this course should enable development of similar classes in secondary schools and undergraduate curricula, to provide opportunities for experience-based science instruction, and university-secondary school collaborations that simultaneously fulfill research needs in the community of science.
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Affiliation(s)
- Lutz Kockel
- Stanford University, Stanford, CA 94305, USA
- Dept. of Developmental Biology, Stanford University SOM, Stanford, CA 94305, USA
| | | | - Jenna Wang
- Phillips Exeter Academy, Exeter, NH 03833, USA
| | | | | | - Arjun Rajan
- Stanford University, Stanford, CA 94305, USA
- Dept. of Developmental Biology, Stanford University SOM, Stanford, CA 94305, USA
| | - Nicole Lantz
- The Lawrenceville School, Lawrenceville, NJ 08648, USA
| | | | - Lillian Dai
- Lexington High School, Lexington, MA 02421, USA
| | | | - Charlene Kim
- Busan International High School, Busan, South Korea
| | - Michelle Li
- Shenzhen Foreign Language School, Shenzhen, China
| | | | - Dongshen Peng
- University of North Carolina, Chapel Hill, NC 27599, USA
| | - Henry Shull
- Harvard University, Cambridge, MA 02138, USA
| | - Lauren Tse
- Hong Kong International School, Hong Kong, China
| | | | - Wenxin Yu
- Guangdong Country Garden School, Guangdong, China
| | - Zee Zhou
- Thomas Jefferson High School for Science and Technology, Alexandria, VA 22312, USA
| | - Anne Rankin
- Phillips Exeter Academy, Exeter, NH 03833, USA
| | - Sangbin Park
- Grier School, Tyrone, PA 16686, USA
- Dept. of Developmental Biology, Stanford University SOM, Stanford, CA 94305, USA
| | - Seung K Kim
- Stanford University, Stanford, CA 94305, USA
- Dept. of Developmental Biology, Stanford University SOM, Stanford, CA 94305, USA
- Lexington High School, Lexington, MA 02421, USA
- Stanford Diabetes Research Center, Stanford, CA 94305, USA
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Rankin AE, Fox E, Chisholm T, Lantz N, Rajan A, Phillips W, Griffin E, Harper J, Suhr C, Tan M, Wang J, Yang A, Kim ES, Ankrah NKA, Chakraborty P, Lam ACK, Laws ME, Lee J, Park KK, Wesel E, Covert PH, Kockel L, Park S, Kim SK. Simplified homology-assisted CRISPR for gene editing in Drosophila. G3 (BETHESDA, MD.) 2024; 14:jkad277. [PMID: 38058125 PMCID: PMC10849607 DOI: 10.1093/g3journal/jkad277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 08/28/2023] [Accepted: 10/29/2023] [Indexed: 12/08/2023]
Abstract
In vivo genome editing with clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9 generates powerful tools to study gene regulation and function. We revised the homology-assisted CRISPR knock-in method to convert Drosophila GAL4 lines to LexA lines using a new universal knock-in donor strain. A balancer chromosome-linked donor strain with both body color (yellow) and eye red fluorescent protein (RFP) expression markers simplified the identification of LexA knock-in using light or fluorescence microscopy. A second balancer chromosome-linked donor strain readily converted the second chromosome-linked GAL4 lines regardless of target location in the cis-chromosome but showed limited success for the third chromosome-linked GAL4 lines. We observed a consistent and robust expression of the yellow transgene in progeny harboring a LexA knock-in at diverse genomic locations. Unexpectedly, the expression of the 3xP3-RFP transgene in the "dual transgene" cassette was significantly increased compared with that of the original single 3xP3-RFP transgene cassette in all tested genomic locations. Using this improved screening approach, we generated 16 novel LexA lines; tissue expression by the derived LexA and originating GAL4 lines was similar or indistinguishable. In collaboration with 2 secondary school classes, we also established a systematic workflow to generate a collection of LexA lines from frequently used GAL4 lines.
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Affiliation(s)
| | - Elizabeth Fox
- The Lawrenceville School, Lawrenceville, NJ 08648, USA
| | | | - Nicole Lantz
- The Lawrenceville School, Lawrenceville, NJ 08648, USA
| | - Arjun Rajan
- Phillips Exeter Academy, Exeter, NH 03833, USA
| | | | | | | | | | - Max Tan
- Phillips Exeter Academy, Exeter, NH 03833, USA
| | - Jason Wang
- Phillips Exeter Academy, Exeter, NH 03833, USA
| | - Alana Yang
- Phillips Exeter Academy, Exeter, NH 03833, USA
| | - Ella S Kim
- Phillips Exeter Academy, Exeter, NH 03833, USA
| | | | | | | | | | - Jackson Lee
- The Lawrenceville School, Lawrenceville, NJ 08648, USA
| | - Kyle K Park
- The Lawrenceville School, Lawrenceville, NJ 08648, USA
| | - Emily Wesel
- Stanford University, Stanford, CA 94305, USA
| | | | - Lutz Kockel
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Sangbin Park
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Seung K Kim
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
- Stanford Diabetes Research Center, Stanford, CA 94305, USA
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