Reticuloendothelial system activity and antibody formation in hibernating hedgehogs (<i>Erinaceus europaeus</i>)

Franceschi, Claudio; Forconi, G.; Perocco, P; Marco, A. T. Di; Prodi, Giorgio

doi:10.1002/jez.1401800109

Cited by 2 publications

(1 citation statement)

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“…The presence of this highly concentrated blood in this organ was then co-opted in mammals for a new function: release of blood cells into the circulation in response to a sudden demand of oxygen. Crile and Quiring 1940;de Oliveira et al 2013 Dasyprocta azarae 0.13 n/a n/a n/a no Herre et al 1996 Hydrochoerus hydrochaeris 0.20 n/a n/a n/a no Eberhardt et al 2015 Lagostomus maximus 0.10 n/a n/a n/a no Herre et al 1996 Microcavia australis 0.22 n/a n/a n/a no Herre et al 1996 Myocastor coypus 0.13 n/a n/a n/a no Mertin et al 2003 Sciuromorpha Eliomys quercinus 0.12 n/a n/a n/a Dicrostonyx groenlandicus 0.19 n/a n/a n/a yes Mallory et al 1986 Cricetulus migratorius 0.14 n/a n/a n/a Franceschi et al 1972;Cirri Borghi 1974 Soricomorpha Suncus etruscus 0.82 n/a n/a n/a no Bartels et al 1979 Suncus murinus 0.55 1 1 yes no Fukuta et al 1982;Tanaka 1990 Sorex araneus n/a 1 1 yes no Bray et al 2008 Sorex caecutiens 0.49 n/a n/a n/a no Kiselev et al 2014 Sorex isodon 0.53 n/a n/a n/a no Kiselev et al 2014 Sorex minutus 0.34 n/a n/a n/a no Nedosekina et al 2007 Crocidura russula 0.74 n/a n/a n/a no Bartels et al 1979;Sánchez-Chardi et al 2007 J RSW Relative splenic weight, n/a not available a splenic type follo...…”

Section: Discussionmentioning

confidence: 96%

Storage of Blood in the Mammalian Spleen: an Evolutionary Perspective

Udroiu

2016

J Mammal Evol

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Splenic blood storage is usually considered a characteristic restricted to Carnivora, Perissodactyla, and Ruminantia. In these mammals, the red pulp comprises the major part of the organ and -within it -the cords show a vast extension, allowing the storage of a great quantity of erythrocytes. Moreover, well-muscularized capsule and trabeculae permit a strong contractility. In this way, a significant quantity of erythrocytes can be poured into the circulation in response to an increased demand of oxygen. These spleens are usually classified as the Bstoring type,î n contrast to the Bdefensive type,^characterized by negligible quantity of blood stored. Past evolutionary interpretations have seen the former type as derived from the latter one. This explanation was based on some ontogenetic observations, thus deriving from the approach of Haeckel's biogenetic law, and caused some contradictions that remained unsolved. An in-depth examination of the literature reveals that almost all mammalian species can store erythrocytes in their spleen. What changes is the quantity of this storage and the efficiency of its release. This means that the dichotomy between Bstorage^and Bdefensivet ypes is just an approximation -and not very useful. Splenic storage, indeed, is not a recently acquired character by some mammals, rather a primitive one, that underwent different quantitative and qualitative changes during the evolution of the different mammalian lineages. This review offers a new hypothesis on the evolution of this function (viewing the presence of splenic erythropoiesis as a biological constraint) and proposes it as a case of exaptation.

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