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Putative midkine family protein up-regulation in Patella caerulea (Mollusca, Gastropoda) exposed to sublethal concentrations of cadmium
Vanucci, S.; Minerdi, D.; Kadomatsu, K.; Mengoni, A.; Bazzicalupo, M. (2005). Putative midkine family protein up-regulation in Patella caerulea (Mollusca, Gastropoda) exposed to sublethal concentrations of cadmium. Aquat. Toxicol. 75(4): 374-379. dx.doi.org/10.1016/j.aquatox.2005.08.014
In: Aquatic Toxicology. Elsevier Science: Tokyo; New York; London; Amsterdam. ISSN 0166-445X, more
Peer reviewed article  

Available in Authors 

Keywords
    Cadmium; Distress signals; DNA; Genes; Marine molluscs; Patella caerulea Linnaeus, 1758 [WoRMS]; Marine

Authors  Top 
  • Vanucci, S.
  • Minerdi, D.
  • Kadomatsu, K.
  • Mengoni, A.
  • Bazzicalupo, M.

Abstract
    A cDNA sequence of a putative midkine (MK) family protein was identified and characterised in the mollusc Patella caerulea. The midkine family consists of two members, midkine and pleiotrophin (PTN), and it is one of the recently discovered cytokines. Our results show that this putative midkine protein is up-regulated in specimens of P. caerulea exposed to sublethal cadmium concentrations (i.e. 0.5 and 1 mg l−1 Cd) over a 10-day exposure period. Semiquantitative RT-PCR and quantitative Real time RT-PCR estimations indicate elevated expression of midkine mRNA in exposed specimens compared to controls. Moreover, RT-PCR Real time values were higher in the viscera (here defined as the part of the soft tissue including digestive gland plus gills) than in the foot (i.e. foot plus head plus heart) of the limpets. At present, information on the functional signalling significance of the midkine family proteins suggests that the up-regulation of P. caerulea putative midkine family protein is a distress signal likely with informative value on health status of the organism and with potential prognostic capability.

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