Journal of Comparative Physiology B

, Volume 188, Issue 4, pp 565–579 | Cite as

Effects of the recombinant crustacean hyperglycemic hormones rCHH-B1 and rCHH-B2 on the osmo-ionic regulation of the shrimp Litopenaeus vannamei exposed to acute salinity stress

  • Laura Camacho-Jiménez
  • Fernando Díaz
  • Edna Sánchez-Castrejón
  • Elizabeth Ponce-Rivas
Original Paper


The Pacific white shrimp Litopenaeus vannamei is a euryhaline organism that copes with salinity fluctuations in the environment; therefore, its osmotic and ionic regulation abilities are vital. Osmoregulation may be controlled by the crustacean hyperglycemic hormone (CHH), a neuropeptide mainly expressed in the eyestalks. In L. vannamei, CHH-B1 and CHH-B2 are CHH isoforms isolated from the eyestalks whose expression is influenced by environmental salinity. It has been suggested that they are involved in the response to salinity stress. To clarify this, we investigated the effect of the recombinant peptides, rCHH-B1 and rCHH-B2, on the osmo-ionic regulation of shrimp acutely exposed to different salinity conditions (8, 26 and 45‰). Both rCHHs promoted differential effects on the osmoregulatory capacity (OC) and the ionoregulatory capacity (IC) for hemolymph Na+ and Cl during iso-osmotic (26‰) and hyper-osmotic (45‰) transfers. These changes were linked to the changes observed in Na+/K+ ATPase and carbonic anhydrase gene expression in gills, especially under high salinity conditions, suggesting that the hormones may regulate the expression of these genes. Glucose and protein levels measured during acute salinity transfer suggest their roles as sources of metabolic energy for osmotic regulation or as organic osmolytes. These results taken together suggest that both the CHH-B1 and CHH-B2 peptides are important regulators of the physiological response of L. vannamei to acute salinity fluctuations.


Shrimp Crustacean hyperglycemic hormone Salinity Osmo-ionic regulation Carbonic anhydrase Na+-K+-ATPase 



This work was funded by the National Council of Science and Technology of Mexico (CONACyT) (Grant CB2009-133958-Z to Ponce-Rivas). The financial support for the doctorate studies of L. Camacho-Jiménez was also granted by CONACyT. We appreciate Dr. John van der Meer for his valuable suggestions in polishing the English in the manuscript. We thank to Ariana Montiel and Gloria Salinas for their help during the sampling procedures.


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Authors and Affiliations

  1. 1.Departamento de Biotecnología MarinaCentro de Investigación Científica y de Educación Superior de EnsenadaEnsenadaMexico
  2. 2.Centro de Investigación en Alimentación y Desarrollo (CIAD)HermosilloMexico

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