Fluorescence imaging of beta cell primary cilia

Area of Science:

• Cell Biology
• Endocrinology
• Microscopy

Background:

• Primary cilia are crucial organelles on pancreatic beta cells, regulating GPCR signaling, calcium influx, and insulin secretion.
• Understanding primary cilia's roles in islet development and differentiation requires effective visualization techniques.
• Ciliary abundance, distribution, and morphology are heterogeneous within islets, necessitating advanced imaging.

Purpose of the Study:

• To present optimized fluorescence imaging methods for observing primary cilia in mouse and human pancreatic islets.
• To provide researchers with accessible tools for studying cilia function in islet biology.

Main Methods:

• Conventional confocal microscopy of fixed islets and pancreas sections.
• Live-cell imaging using cilia-targeted biosensors and probes.
• Cilia motion recording and quantitative waveform analysis in an ex vivo environment.

Main Results:

• Demonstrated successful application of various fluorescence microscopy techniques for primary cilia visualization.
• Provided insights into ciliary heterogeneity within pancreatic islets.
• Established methods for analyzing ciliary dynamics and morphology.

Conclusions:

• Optimized fluorescence microscopy methods facilitate the study of primary cilia in pancreatic islets.
• These techniques are essential for elucidating the underappreciated roles of primary cilia in islet biology.
• Future advancements in imaging tools will further enhance the observation of pancreatic islet primary cilia.