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Updated: Feb 14, 2026
06:19
In situ Protocol for Butterfly Pupal Wings Using Riboprobes
Published on: May 28, 2007
11.5K
TRPA1 for Butterfly Eyespot Formation.
1The BCPH Unit of Molecular Physiology, Department of Chemistry, Biology and Marine Science, Faculty of Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan.
International Journal of Molecular Sciences
|February 13, 2026
Summary
Transient Receptor Potential Melastatin 8 (TRPM8) channels are crucial for butterfly eyespot development. Manipulating TRPM8 activity in pupae altered eyespot size and color patterns in adult butterfly wings.
Area of Science:
- Developmental Biology
- Molecular Biology
- Genetics
Background:
- Butterfly wing color patterns form through 2D morphogenesis and lateral signaling in pupal tissues.
- Transient Receptor Potential (TRP) channels are multimodal sensors potentially involved in this developmental process.
Purpose of the Study:
- To investigate the role of TRP channels, specifically TRPA1, in the development of butterfly wing color patterns, focusing on eyespot formation.
Main Methods:
- Injected TRPA1 antagonists (AM0902, AP-18) and an agonist (JT010) into pupae of the blue pansy butterfly (Junonia orithya).
- Analyzed changes in eyespot size (core disk, outer black ring, orange ring) in adult wings.
- Detected TRPA1 mRNA using RT-PCR in pupal wing tissues.
- Used an antibody against J. orithya TRPA1 to observe effects on color patterns and wing veins.
Main Results:
- TRPA1 antagonist AM0902 increased eyespot core disk and outer black ring areas.
- TRPA1 agonist JT010 decreased eyespot core disk area and increased the orange ring area.
- TRPA1 mRNA was detected in pupal wing tissues.
- Antibody injection caused aberrant color patterns and wing vein defects.
Conclusions:
- TRPA1 is expressed in pupal wing tissue and plays a role in integrating signaling for eyespot size and structure.
- TRPA1 appears to suppress black pigmentation (core disk, outer ring) and enhance non-black (orange) pigmentation during eyespot development.
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