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Pheromonal induction of spatial learning in mice (2012)

S. A. Roberts ; A. J. Davidson ; L. McLean ; [weitere]

American Association for the Advancement of Science (AAAS)

In: Science. 338(6113): 1462-5. doi: 10.1126/science.1225638.

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Publikationsdatum: 2012-12-15

Beschreibung: Many mammals use scent marking for sexual and competitive advertisement, but little is known about the mechanism by which scents are used to locate mates and competitors. We show that darcin, an involatile protein sex pheromone in male mouse urine, can rapidly condition preference for its remembered location among females and competitor males so that animals prefer to spend time in the site even when scent is absent. Learned spatial preference is conditioned through contact with darcin in a single trial and remembered for approximately 14 days. This pheromone-induced learning allows animals to relocate sites of particular social relevance and provides proof that pheromones such as darcin can be highly potent stimuli for social learning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, Sarah A -- Davidson, Amanda J -- McLean, Lynn -- Beynon, Robert J -- Hurst, Jane L -- BB/J002631/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBC503897/Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2012 Dec 14;338(6113):1462-5. doi: 10.1126/science.1225638.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Mammalian Behaviour and Evolution Group, Institute of Integrative Biology, University of Liverpool, Leahurst Campus, Neston CH64 7TE, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23239735" target="_blank"〉PubMed〈/a〉

Schlagwort(e): Animals ; Competitive Behavior/drug effects/*physiology ; Conditioning (Psychology)/drug effects/physiology ; Female ; Male ; Maze Learning/drug effects/*physiology ; Mice ; Mice, Inbred C57BL ; Proteins/pharmacology/*physiology ; Sex Attractants/pharmacology/*physiology/urine ; Smell/drug effects/physiology ; Spatial Behavior/drug effects/*physiology

Print ISSN: 0036-8075

Digitale ISSN: 1095-9203

Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

Publiziert von American Association for the Advancement of Science (AAAS)

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Changes in the cellularity of the cortex of human hairs as an indicator of radiation exposure (1996)

Potten, C. S. ; Burt, P. A. ; Roberts, S. A. ; [weitere]

Springer

Radiation and environmental biophysics 35 (1996), S. 121-125

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ISSN: 1432-2099

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Physik

Notizen: Abstract Growing hair follicles with their rapid cell proliferation would be expected to be sensitive organs to cytotoxic agents such as radiation. Various abnormalities in the hair and hair follicles have been reported in the past. Changes in the number of cells in the newly forming hair cortex have been shown in the mouse to be one of the more sensitive assays for radiation effects, and this approach could provide a basis for a biological dosimeter. Here we show for the first time using hair cortex cell counts some preliminary data indicating that the number of cell nuclei in a unit of length (140 μm) of the cortex of human hairs from the chest and scalp of patients undergoing fractionated radiotherapy falls significantly (P=0.005) by 5%–10% 3 days after the first dose in a fractionated sequence of irradiations. The first dose was delivered on a Friday, and no further exposures were delivered until after the hair sample was taken on the 3rd day (Monday). No significant effect of radiation dose could be detected over the available, limited range of doses studied (5–6.5 Gy with one exit dose sample at 2.6 Gy). Also, the width varies from hair to hair. If the width of the hair is taken into account and the cortical nuclei counts are normalised to the width of each hair, the effects seen at day 3 become slightly more significant (P=0.002), and those at day 5 also become significant (P=0.012). Samples taken on the 5th day after the first (Friday) exposure were also 2 days after the second exposure and 1 day after the third exposure. However, little expression of damage attributable to the 2nd and 3rd exposures was anticipated since their effects would take some time to be expressed in the cortical region examined, which is some distance from the proliferative region of the follicle.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02434035

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Digitale Medien

Changes in the cellularity of the cortex of human hairs as an indicator of radiation exposure (1996)

Potten, C. S. ; Burt, P. A. ; Roberts, S. A. ; [weitere]

Springer

Radiation and environmental biophysics 35 (1996), S. 121-125

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-2099

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Physik

Notizen: Abstract Growing hair follicles with their rapid cell proliferation would be expected to be sensitive organs to cytotoxic agents such as radiation. Various abnormalities in the hair and hair follicles have been reported in the past. Changes in the number of cells in the newly forming hair cortex have been shown in the mouse to be one of the more sensitive assays for radiation effects, and this approach could provide a basis for a biological dosimeter. Here we show for the first time using hair cortex cell counts some preliminary data indicating that the number of cell nuclei in a unit of length (140 µm) of the cortex of human hairs from the chest and scalp of patients undergoing fractionated radiotherapy falls significantly (P = 0.005) by 5%–10% 3 days after the first dose in a fractionated sequence of irradiations. The first dose was delivered on a Friday, and no further exposures were delivered until after the hair sample was taken on the 3rd day (Monday). No significant effect of radiation dose could be detected over the available, limited range of doses studied (5 – 6.5 Gy with one exit dose sample at 2.6 Gy). Also, the width varies from hair to hair. If the width of the hair is taken into account and the cortical nuclei counts are normalised to the width of each hair, the effects seen at day 3 become slightly more significant (P = 0.002), and those at day 5 also become significant (P = 0.012). Samples taken on the 5th day after the first (Friday) exposure were also 2 days after the second exposure and 1 day after the third exposure. However, little expression of damage attributable to the 2nd and 3rd exposures was anticipated since their effects would take some time to be expressed in the cortical region examined, which is some distance from the proliferative region of the follicle.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/s004110050019

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