Modelling a molecular calendar

the seasonal photoperiodic response in mammals

Oliver Ebenhöh, David Hazlerigg

Research output: Contribution to journalArticle

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Abstract

Organisms use biological timing mechanisms to synchronise life-history transitions to annual environmental cycles. For species living outside the equatorial zone, day length change is a widely used external cue for seasonal biological clocks. This paper builds on recent developments in understanding the neuroanatomical basis of day length measurement (photoperiodism) in mammals, by taking a modelling approach to the molecular readout mechanism. We find that, while a circadian clock based system can drive day length dependent changes in the amplitude of a seasonal output (in this case production of the hormone thyrotrophin), the inclusion of a positive feedback based amplifier mechanism generates photoperiodic transitions that more closely match experimental observations. The analogies between our model and those proposed for boundary generation in developmental biology are briefly discussed.
Original languageEnglish
Pages (from-to)39-47
Number of pages9
JournalChaos, Solitons & Fractals
Volume50
Early online date21 Dec 2012
DOIs
Publication statusPublished - May 2013

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Calendar
Photoperiodism
Modeling
Developmental Biology
Positive Feedback
Hormones
Annual
Analogy
Timing
Inclusion
Cycle
Dependent
Output
Model

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Modelling a molecular calendar : the seasonal photoperiodic response in mammals. / Ebenhöh, Oliver; Hazlerigg, David.

In: Chaos, Solitons & Fractals, Vol. 50, 05.2013, p. 39-47.

Research output: Contribution to journalArticle

Ebenhöh, Oliver ; Hazlerigg, David. / Modelling a molecular calendar : the seasonal photoperiodic response in mammals. In: Chaos, Solitons & Fractals. 2013 ; Vol. 50. pp. 39-47.
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