Chronic exposure to low doses of ionizing radiation impacts the processing of glycoprotein N-linked glycans in Medaka (Oryzias latipes). (4th March 2021)

• Record Type: Journal Article
• Authors: Perez-Gelvez, Yeni Natalia C.; Unger, Shem; Kurz, Simone; Rosenbalm, Katelyn; Wright, William Matthew; Rhodes, Olin E.; Tiemeyer, Michael; Bergmann, Carl W.
• Is Part Of: International journal of radiation biology. Volume 97:Number 3(2021)
• Page Start: 401
• Page End: 420
• Publication Date: 2021-03-04
• Subjects: Medaka -- chronic exposure -- N-glycans -- low dose IR (LoDIR); Radiation -- Physiological effect -- Periodicals; Radiobiology -- Periodicals; 571.45
• DOI: 10.1080/09553002.2021.1864500
• Languages: English
• ISSNs: 0955-3002

Abstract

Abstract: Purpose: Ionizing radiation is found naturally in the environment. Low doses of IR may have beneficial applications, yet there is also potential for detrimental long-term health effects. Impacts following exposure to low levels of IR have been refractory to identification and quantification. Glycoprotein glycosylation is vital to cell–cell communication and organismal function, and sensitive to changes in an organism's macro- and cellular environment. We investigated whether accumulated low doses of IR (LoDIR) affect the N-linked glycoprotein glycans using Medaka fish (Oryzias latipes). Materials and methods: State-of-the-art methods in radiation exposure and glycan analysis were applied to study N-glycan changes after 190 day exposure at three different rates of gamma irradiation (2.25, 21.01, and 204.3 mGy/day) in wild-type adult Medaka. Tissue N-glycans were analyzed following enzymatic release from extracted proteins. Results: N-linked glycan profiles are dominated by complex type N-glycans modified with terminal sialic acid and core fucose. Fucosylation and sialylation of N-linked glycoprotein glycans are affected by LoDIR and a subset of N-glycans are involved in the organismal radio–response. Conclusion: This is the first indication that the glycome can be interrogated for biomarkers that report the impact of chronic exposure to environmental stressors, such as low-level IR.