The effects of sex, body length, and different habitats on the serum protein electrophoresis of the broad‐snouted caiman (Caiman latirostris)
2020
BACKGROUND: Knowledge of mammalian inflammatory responses is vast; however, many aspects of the inflammatory response in non-mammalian vertebrates, such as reptiles, remain unclear, including those regarding acute-phase proteins (APPs). Recent studies have focused on the use of serum protein electrophoresis (SPE) to assess inflammatory responses in the broad-snouted caiman (Caiman latirostris) and other reptiles. OBJECTIVES: The purpose of this study was to examine the effects of sex, body length, and different habitats on SPE patterns in C latirostris using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). METHODS: A total of 40 animals of both sexes and varying body lengths were collected; of these, 23 were free-living in an industrial complex (site 1), and 17 were captive on a rural property (site 2). Sodium dodecyl sulfate-polyacrylamide gel electrophoresis was performed to fractionate different serum protein constituents. RESULTS: Sex affected protein levels, with females showing higher serum levels of total protein, as well as the 90-, 66-, and 58-kDa proteins compared with males. Similarly, body length affected protein levels, with male adults >1.70 m in length showing the lowest serum levels of 152-, 58-, 54-, and 27-kDa proteins of all other animals. Finally, habitat affected protein levels, with animals at site 1 showing higher serum levels of 152- and 41-kDa proteins compared with those at site 2. CONCLUSIONS: This preliminary study was the first to evaluate the SPE of C latirostris using SDS-PAGE. Further studies to identify the proteins in each band with more specific and sensitive techniques (eg, mass spectrometry) should be conducted to elucidate the standard of APPs in reptiles better.
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