Recordings from cultured newt olfactory receptor cells

Area of Science:

• Neuroscience
• Cell Biology
• Sensory Physiology

Background:

• Olfactory receptor cells (ORCs) are crucial for studying olfactory signal transduction.
• Traditionally, ORCs are studied within days of dissociation due to concerns about cell degradation.
• The reliability of electrophysiological data from dissociated ORCs requires further investigation.

Purpose of the Study:

• To assess the long-term viability and electrophysiological stability of dissociated newt ORCs.
• To determine how long these cells retain their fundamental electrical and morphological features in culture.
• To evaluate the suitability of dissociated ORCs for extended electrophysiological research.

Main Methods:

• Dissociated olfactory receptor cells (ORCs) from newts were cultured.
• Cell viability was assessed using trypan blue exclusion.
• Morphological integrity was monitored over time.
• Electrophysiological properties, including membrane properties and cell excitation, were recorded throughout the culture period.

Main Results:

• While cell numbers decreased, remaining ORCs retained their morphology and fundamental electrical features up to day 19.
• Cilia and dendrite structures were observed in some cells until day 21, with bipolar morphology maintained until day 31.
• Cell excitation features remained stable as long as morphological integrity was preserved.
• Dissociated ORCs demonstrated stable electrical properties for several weeks, comparable to their in vivo lifespan.

Conclusions:

• Dissociated newt ORCs exhibit remarkable long-term stability in culture.
• Electrophysiological data obtained from these cells are reliable for extended periods, extending beyond the traditional few days.
• These findings validate the use of dissociated ORCs for in-depth studies of olfactory mechanisms over several weeks.