Abstract #2138

Observation of morphochemical changes and water molecule dynamics of Trypoxylus dichotomus in the pupal stage using 9.4-T MRI

Shoto Ikegami¹, Ren Harada², Kyoya Takei³, Kenji Osaku³, Yoshiki Oda⁴, Kinuko Niihara⁵, Masafumi Yoshida^5,6, Takashi A. Inoue⁶, Keiichi Honda⁷, and Kagayaki Kuroda^1,2,3

¹Course of Science and Technology, Graduate School of Science and Technology, Tokai University, Hiratsuka, Japan, ²Course of Electrical and Engineering, Graduate School of Engineering, Tokai University, Hiratsuka, Japan, ³Department of Human and Information Science, School of Information Science and Technology, Tokai University, Hiratsuka, Japan, ⁴Technical Joint Management Office, Tokai University, Hiratsuka, Japan, ⁵Department of Natural Sciences, Faculty of Science and Engineering, Tokyo City University, Setagaya, Japan, ⁶Division of Natural Sciences, Graduate School of Integrative Science and Engineering, Tokyo City University, Setagaya, Japan, ⁷Saijo Ecology Institute, Higashi-hiroshima, Japan

Synopsis

Keywords: Diffusion Analysis & Visualization, Diffusion Tensor Imaging, Spectroscopy, Morphology

Motivation: Clarification of tissue destruction and reconstruction process of holometabolous insects might lead to innovative technology for regenerative medicine.

Goal(s): Observation of Morpholochemical changes and water molecule dynamics in the pupal body.

Approach: We applied T2W, DTI and PRESS to the pupal body of Trypoxylus dichotomus.

Results: From the pupation, the digestive tract swelled and became a liquid reservoir. It has high ADC and FA in the Head-Foot direction. After the pupation, the structure was narrower and elongated. The results suggest that destructed tissues were stored temporarily in the form of reservoir, and through the liquid channel around the reservoir to reconstruction tissues.

Impact: In the pupal body, the tissue absorbed into the digestive tract while some of the nervous system and muscles are retained formed a liquid reservoir, used to form adult tissues such as flight muscles through certain liquid channel.

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