Comparison of venom composition and biological activities of the subspecies Crotalus lepidus lepidus, Crotalus lepidus klauberi and Crotalus lepidus morulus from Mexico
Martínez Romero, Gerardo
Rucavado Romero, Alexandra
Gutiérrez, José María
Garza García, Yolanda
Zugasti Cruz, Alejandro
MetadataShow full item record
The rock rattlesnakes Crotalus lepidus comprise a group (lepidus, klauberi, morulus and maculosus) of poorly known mountain cold-tolerant snakes in Mexico. In particular, Crotalus lepidus morulus is a snake endemic of the northeast of Mexico, whereas Crotalus lepidus klauberi and C. l. lepidus are distributed in some regions of the north and central Mexico and southern U. S. Until now very little data are available from C. lepidus subspecies from Mexico, as the terrain inhabited by these snakes is generally steep and rugged. In this work, we have determined some biochemical and biological properties of C. l. morulus, C. l. klauberi and C. l. lepidus crude venoms. Some minor differences in venoms were noted in SDS-PAGE, HPLC profile and MALDI-TOF mass spectrometry analysis. Partial sequences of metalloproteinases, phospholipases A2 (PLA2) and galactose-specific lectins were identified in the venoms. Venoms of C. l. klauberi and C. l. lepidus had significantly higher hemorrhagic and lethal activities than C. l. morulus venom. Proteolytic activity in azocasein was higher in C. l. morulus venom, whereas gelatin hydrolysis was higher in C. l. klauberi. Fibrinogenolytic and PLA2 activities were very similar in all venoms tested. The histological observations in the gastrocnemius muscle damaged by venoms from all the subspecies confirmed myonecrotic and hemorrhagic activities (at 3 and 24 h), which resulted in a poor regenerative response after 14 days. However, C. l. lepidus and C. l. klauberi venom induced a higher increase in the plasma activity of creatine kinase (CK), evidencing higher myotoxicity, whereas paw edema-inducing activity was higher in C. l. lepidus venom. The results indicate that the venoms from the three subspecies have similar protein profiles in electrophoresis, HPLC and molecular weight determinations. However, differences were found in the biological activities in mice. Notably, the venoms of C. l. lepidus and C. l. klauberi present higher toxicity (lower LD50) and hemorrhagic activity than C. l. morulus venom.
- Microbiología 
Showing items related by title, author, creator and subject.
Snake Venomics of the Central American Rattlesnake Crotalus simus and the South American Crotalus durissus Complex Points to Neurotoxicity as an Adaptive Paedomorphic Trend along Crotalus Dispersal in South America Calvete Chornet, Juan José; Sanz, Libia; Cid, Pedro; De La Torre, Pilar; Flores Díaz, Marietta; Dos Santos, María Cristina; Borges, Adolfo; Bremo, Adolfo; Angulo Ugalde, Yamileth; Lomonte, Bruno; Alape Girón, Alberto; Gutiérrez, José María (2010)We report a comparative venomic and antivenomic characterization of the venoms of newborn and adult specimens of the Central American rattlesnake, Crotalus simus, and of the subspecies cumanensis, durissus, ruruima, and ...
Biochemical and pharmacological similarities between the venoms of newborn Crotalus durissus durissus and adult Crotalus durissus terrificus rattlesnakes Gutiérrez, José María; Dos Santos, María Cristina; Furtado, María de Fátima; Rojas Céspedes, Gustavo (1991)A comparative study was performed with the venoms of newborn Crotalus durissus durissus, adult Crotalus durissus terrificus and adult Crotalus durissus durissus snakes. Venom of newborn specimens of C.d. durissus is very ...
Geographic and ontogenic variability in the venom of the neotropical rattlesnake Crotalus durissus: Pathophysiological and therapeutic implications Saravia Otten, Patricia; Rojas Umaña, Ermila; Arce, Viviana; Guevara, Corina; López, Juan Carlos; Chaves Olarte, Esteban; Velásquez, Rubén; Rojas Céspedes, Gustavo; Gutiérrez, José María