scholarly journals An estimate of the resting membrane resistance of frog olfactory receptor neurones

2004 ◽  
Vol 559 (2) ◽  
pp. 535-542 ◽  
Author(s):  
Raymund Y. K. Pun ◽  
Steven J. Kleene
Keyword(s):  
Olfactory Receptor ◽  
Membrane Resistance ◽  
Olfactory Receptor Neurones

A Calcium-Activated Nonspecific Cation Channel from Olfactory Receptor Neurones of the Silkmoth Antheraea Polyphemus

1991 ◽  
Vol 161 (1) ◽  
pp. 455-468
Author(s):  
F. ZUFALL ◽  
H. HATT ◽  
T. A. KEIL
Keyword(s):  
Olfactory Receptor ◽  
Single Channel ◽  
Membrane Vesicles ◽  
Cation Channel ◽  
Voltage Response ◽  
Antheraea Polyphemus ◽  
Cell Excitability ◽  
Olfactory Receptor Neurones ◽  
Single Channel Currents ◽  
Channel Currents

Single-channel patch-clamp techniques were used to identify and characterize a Ca2+-activated nonspecific cation channel (CAN channel) on insect olfactory receptor neurones (ORNs) from antennae of male Antheraea polyphemus. The CAN channel was found both in acutely isolated ORNs from developing pupae and in membrane vesicles from mature ORNs that presumably originated from inner dendritic segments. Amplitude histograms of the CAN single-channel currents presented well-defined peaks corresponding to at least four channel substates each having a conductance of about 16 pS. Simultaneous gating of the substates was achieved by intracellular Ca2+ with an EC50 value of about 80 nmoll−1. Activity of the CAN channel could be blocked by application of amiloride (IC50 <100nmoll−1). Moreover, in the presence of 1μmoll−1 Ca2+, opening of the CAN channel was totally suppressed by 10 μmoll−1 cyclic GMP, whereas ATP (1 mmol l−1) was without effect. We suggest that the CAN channel plays a specific role in modulation of cell excitability and in shaping the voltage response of ORNs.

Differential Expression of Two Carbohydrate Epitopes, CD15 and HNK-1, in Developing Vertebrate Olfactory Receptor Neurones

2001 ◽  
Vol 39 (2) ◽  
pp. 65-71 ◽  
Author(s):  
Stefan Arnhold ◽  
Sabine Wenisch ◽  
Rudolf Leiser ◽  
Christian Andressen ◽  
Klaus Addicks
Keyword(s):  
Differential Expression ◽  
Olfactory Receptor ◽  
Carbohydrate Epitopes ◽  
Olfactory Receptor Neurones

Sodium/calcium exchanger in olfactory receptor neurones of Xenopus laevis

Neuroreport ◽  
1994 ◽  
Vol 5 (14) ◽  
pp. 1741-1744 ◽  
Author(s):  
Anita Jung ◽  
Fritz Walter Lischka ◽  
Jutta Engel ◽  
Detlev Schild
Keyword(s):  
Xenopus Laevis ◽  
Olfactory Receptor ◽  
Sodium Calcium Exchanger ◽  
Sodium Calcium ◽  
Olfactory Receptor Neurones

Pre- and postembryonic development, growth and turnover of olfactory receptor neurones in crayfish antennules

1996 ◽  
Vol 199 (11) ◽  
pp. 2409-2418 ◽  
Author(s):  
R Sandeman ◽  
D Sandeman
Keyword(s):  
Olfactory Receptor ◽  
Carapace Length ◽  
Adult Stage ◽  
Postembryonic Development ◽  
Delayed Differentiation ◽  
Stage Of Development ◽  
Cherax Destructor ◽  
Lateral Flagellum ◽  
Wide Range ◽  
Olfactory Receptor Neurones

The antennules of the crayfish Cherax destructor can first be observed as antero-laterally located lobes in embryos that have reached the 50 % stage of development. Clusters of cells that are probably the olfactory receptor neurones (ORNs) appear at the distal end of these lobes, which later differentiate into the lateral flagella of the antennules. New clusters of ORNs and segments are added at the proximal end of the lateral flagellum throughout the postembryonic stages and well into the juvenile adult stage. From a comparison of the exuvia and the newly emerged flagella in animals over a wide range of sizes, we conclude that, once the animals reach a certain size (approximately 7 mm carapace length), the most distal, and oldest, segments of the antennule are shed. Growth occurs from the proximal end of the flagellum, and the addition of new ORNs is the result of a delayed differentiation of the flagellar segments that takes place at the proximal end of the chemoreceptor array, about halfway along the flagellum.

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