Irecta-Najera C.A.,Colegio de Mexico |
Del Rosario Huizar-Lopez M.,Centro Universitario Of Ciencias Biologicas ropecuarias |
Casas-Solis J.,Centro Universitario Of Ciencias Biologicas ropecuarias |
Castro-Felix P.,Centro Universitario Of Ciencias Biologicas ropecuarias |
Santerre A.,Centro Universitario Of Ciencias Biologicas ropecuarias
Probiotics and Antimicrobial Proteins | Year: 2017
The administration of probiotics is a promising approach to reduce the prevalence of colon cancer, a multifactorial disease, with hereditary factors, as well as environmental lifestyle-related risk factors. Biogenic polyamines, putrescine, spermidine, and spermine are small cationic molecules with great roles in cell proliferation and differentiation as well as regulation of gene expression. Ornithine decarboxylase is the first rate-limiting enzyme for polyamine synthesis, and upregulation of ornithine decarboxylase activity and polyamine metabolism has been associated with abnormal cell proliferation. This paper is focused on studying the protective role of Lactobacillus casei ATCC 393 in a chemically induced mouse model of colon carcinogenesis, directing our attention on aberrant crypt foci as preneoplastic markers, and on polyamine metabolism as a possible key player in carcinogenesis. BALB/c mice were administered 1,2-dimethylhydrazine dihydrochloride (DMH) to induce colon cancer (20 mg/kg body weight, subcutaneous, twice a week for 24 weeks). L. casei ATCC 393 was given orally (106 CFU, twice a week), 2 weeks before DMH administration. Hematoxylin and eosin staining, high-performance liquid chromatography, and Western blotting were used to evaluate aberrant crypt foci, urinary polyamines, and ornithine decarboxylase expression in the colon. The experimental data showed that the preventive administration of L. casei ATCC 393 may delay the onset of cancer as it significantly reduced the number of DMH-induced aberrant crypt foci, the levels of putrescine, and the expression of ornithine decarboxylase. Hence, this probiotic strain has a prospective role in protection against colon carcinogenesis, and its antimutagenic activity may be associated with the maintenance of polyamine metabolism. © 2017 Springer Science+Business Media New York
Villasenor-Cabrera T.,Hospital Civil Fray Antonio Alcalde |
Pacheco-Sanchez I.,Centro Universitario Of Tonala |
Nuno-Romero R.,Centro Universitario Of Ciencias Biologicas ropecuarias |
Garcia-Estrada J.,University of Guadalajara
Revista de Neurologia | Year: 2016
Introduction. Gastroschisis is a malformation of the abdominal wall that is corrected by surgery and requires special hospital care, such as immobilisation, dietary restriction and separation from the mother for a variable period of time, among others. To analyse the possible cognitive repercussions, the Bayley III test was administered to 14 children. Subjects and methods. The study was conducted with seven cases (born with gastroschisis) and seven controls, in civil hospitals in Guadalajara, over the period January-April 2013. Results. No evidence of retardation was found in the cases in the cognition, language and motor conduct assessments, whereas in those associated with socio-emotional and adaptive behaviour the scores favoured the control group. This shows that the latter have better adaptation and interaction strategies with respect to the cases group. Conclusions. Gastroschisis will not affect later neurodevelopment, at least in this group which presented only this abnormality and deficits that can be explained by their perinatal circumstances. Nevertheless, this prognosis cannot be generalised to other cases with a more severe clinical picture, a longer stay in hospital and associated comorbidity. In any case, it is important to inform the parents as of the prenatal stage about the expected consequences of this pathology. © 2016, Revista de Neurologia. All rights reserved.
Additional records of the Western Snail-eating snake Tropidodipsas annulifera (Serpentes: Dipsadidae) in the state of Jalisco, Mexico [Registros adicionales de la serpiente caracolera occidental Tropidodipsas annulifera (Serpentes: Dipsadidae) en el estado de Jalisco, México]
Ahumada-Carrillo I.T.,Centro Universitario Of Ciencias Biologicas ropecuarias |
Weatherman G.N.,University of Kansas |
Vazquez-Huizar O.,Centro Universitario Of Ciencias Biologicas ropecuarias
Revista Mexicana de Biodiversidad | Year: 2016
Based on 2 specimens, we documented the occurrence of Tropidodipsas annulifera in the municipalities of Chapala and Zapopan, Jalisco, Mexico. This species was previously recorded in Jalisco only by 9 specimens. Herein we extend the known distribution in the state. Additionally, we present new data on morphological characters of the species. © 2016 Universidad Nacional Autónoma de México, Instituto de Biología.
Canales-Aguirre A.A.,Research Center y Asistencia en Tecnologia |
Gomez-Pinedo U.A.,del Hospital Clinico San Carlos |
Luquin S.,University of Guadalajara |
Ramirez-Herrera M.A.,Laboratorio Of Neurofisiologia |
And 2 more authors.
Nutritional Neuroscience | Year: 2012
One of the main concerns regarding organophosphate pesticides (OP) is their possible toxic effects. Doses that do not produce acute toxicity are capable of altering the structure and biochemistry of different tissues and organs by production of reactive oxygen species (ROS). Curcumin (CUR) is the main substance in Curcuma longa (Zingiberacea) rhizome that has strong antioxidant activity. However, the neuroprotective properties of curcumin against oxidative stress induced by prolonged exposure to parathion (PAR) is not clear. Objective: The present work evaluated the protective effect of curcumin against the oxidative damage induced in the rat hippocampus by the OP PAR. Methods: Forty female Wistar rats were distributed in four groups as follows: exposed to PAR by inhalation (PAR group); pre-treated with CUR and then exposed to PAR by inhalation, (CUR + PAR group); exposed to environmental air and treated with CUR in the food (CUR group); and exposed to environmental air (the control group). At the end of the handling process, the concentration of erythrocyte cholinesterase was monitored, as indicator of PAR intoxication and lipoperoxidation, immunohistochemistry for astrocytes, and activated microglia and apoptosis was determined in the hippocampus. Results: In the present study, we show that the administration of CUR (200 mg/kg body weight) significantly diminished the oxidative damage in the hippocampus of rats exposed to the OP PAR. Discussion: These data suggest that CUR may be an alternative to prevent neurodegenerative damage after pesticide exposure. © W.S. Maney & Son Ltd 2012.
Jadin R.C.,University of Texas at Arlington |
Jadin R.C.,University of Colorado at Boulder |
Velasco J.R.,Centro Universitario Of Ciencias Biologicas ropecuarias |
Smith E.N.,University of Texas at Arlington
Phyllomedusa | Year: 2010
A study was conducted to examine the adult male specimens of Crotalus ericsmithi, C. lannomi and C. stejnegeri deposited at the Amphibian and Reptile Diversity Research Center, University of Texas at Arlington. Around 15 specimens of long-tailed rattlesnakes had been deposited in museum collections. A long tail might be a primitive character state in rattlesnakes thereby casting doubt on the monophyly of long-tailed rattlesnakes. Hemipenial characters are particularly useful in evolutionary studies because they are closely associated with species differentiation and reproductive behaviors. Although C. stejnegeri was described nearly nine decades ago, some features of its unique hemipenis have not been published. The hemipenes of Crotalus stejnegeri, C. ericsmithi, and C. lannomi are remarkably similar to each other and dissimilar to those of other rattlesnakes. Nonetheless there are distinctions among the three species. All three hemipenes have lobes of similar length, about 17 mm long, allowing for accurate comparison.
Jay O.,University of Salvador |
Torres V.,Institute Ciencia Animal |
Marrero Y.,Institute Ciencia Animal |
Torres P.,Centro Universitario Of Ciencias Biologicas ropecuarias
Cuban Journal of Agricultural Science | Year: 2012
In order to find a tool for comparing multiple curves of in vitro gas production to assess ruminants' feeds, the square mean distance between curves is proposed as statistical distance. The performance of four comparison tests of fixed range using this distance: lowest significant distance (LSD), Tukey's honest significant distance (HSD), Scheffé's significant distance (SSD) and Bonferroni-corrected significant distance (BSD) through four experiments simulated by Monte Carlo. The signification level of the tests is also analyzed when the number of treatments or the variation between the simulation parameters increases. It was proved that the Tukey test was stable and limited the inflation, the error type 1, when the number of treatments increases. Besides, it is the most adequate in multiple comparisons of this kind of experiment.
Reyes-Velasco J.,University of Texas at Arlington |
Reyes-Velasco J.,Simon Bolivar University of Venezuela |
Ahumada-Carrillo I.,Centro Universitario Of Ciencias Biologicas ropecuarias |
Burkhardt T.R.,10150 West Rudasill Rd. |
Devitt T.J.,University of Texas at Austin
Zootaxa | Year: 2015
We describe two new species of Eleutherodactylus, subgenus Syrrhophus, from two separate mountain ranges in western Mexico. Eleutherodactylus grunwaldi sp. nov. inhabits the Sierra de Manantlán in Colima and Jalisco from 1300 to 2200 m, whereas E. wixarika sp. nov. is known from a single locality in the Sierra Huichola of northern Jalisco at 2400 m, but is probably more widespread. Eleutherodactylus grunwaldi is readily distinguishable from most members of mainland Syrrhophus by a combination of its large size, broad, truncate digital pads more than three times the narrowest part of the digit, and a black and green marbled color pattern. This species is saxicolous, inhabiting limestone outcrops, and has been found in caves during the dry season. Eleutherodactylus wixarika is a moderate sized species, most similar to E. teretistes, E. pallidus and E. modestus. It is distinguished from all other members of the subgenus by the combination a tuberculate, reddish dorsum, lack of compact lumbar glands, and expanded digital pads less than twice the width of the narrowest part of the digit. This species inhabits areas with secondary vegetation in pine forest. Males of both species call at night during the rainy season. The advertisement call of both species consists of a short, narrow band, pure-tone note organized into a discrete train at a rate of about six times per minute. Spectral and temporal acoustic properties differ between species. The subgenus Syrrhophus of the genus Eleutherodactylus is one of the most poorly studied groups of frogs in Mexico but probably one of the most diverse. Copyright © 2015 Magnolia Press.
Diversity, structure, and temporal variation of fish assemblages associated to Playa Mora coral reef, Tenacatita Bay, Mexico [Diversidad, estructura y variación temporal del ensamble de peces asociados al arrecife coralino de Playa Mora, Bahía de Tenacatita, México]
Galvan-Villa C.M.,Centro Universitario Of Ciencias Biologicas ropecuarias |
Lopez-Uriarte E.,Centro Universitario Of Ciencias Biologicas ropecuarias |
Arreola-Robles J.L.,Monterrey Institute of Technology
Hidrobiologica | Year: 2011
This study describes the structure and temporal variation of fish assemblages associated with Playa Mora coral reef, Jalisco, México. The species present were recorded with visual censuses along transects of 50 x 5 m, in three different seasons of the year (temperate-dry, warm-rainy, and warm-dry). A total of 5,689 fishes of 64 species were recorded. The best represented families according to species richness were Labridae (7) and Pomacentride (6). The biological value index determined that Thalassoma lucasanum, Stegastes acapulcoensis, Microspathodon dorsalis, and Prionurus punctatus were the dominant species. The fish assemblages by specific richness and trophic groups displayed temporal changes. The temperate-dry season presented the greatest richness and abundance of fish. The trophic category composition was mainly represented by carnivorous fish, which were dominant in the reef. The carnivorous, carnivorous-coralivores, obligate coralivores, herbivorous, zooplanktivorous, and parasitic species were better represented in the temperate-dry season, while the omnivores increased in the warm season.
PubMed | 10150 West Rudasill Rd.Tucson, University of Texas at Arlington, University of Texas at Austin and Centro Universitario Of Ciencias Biologicas ropecuarias
Type: Journal Article | Journal: Zootaxa | Year: 2015
We describe two new species of Eleutherodactylus, subgenus Syrrhophus, from two separate mountain ranges in western Mexico. Eleutherodactylus grunwaldi sp. nov. inhabits the Sierra de Manantln in Colima and Jalisco from 1300 to 2200 m, whereas E. wixarika sp. nov. is known from a single locality in the Sierra Huichola of northern Jalisco at 2400 m, but is probably more widespread. Eleutherodactylus grunwaldi is readily distinguishable from most members of mainland Syrrhophus by a combination of its large size, broad, truncate digital pads more than three times the narrowest part of the digit, and a black and green marbled color pattern. This species is saxicolous, inhabiting limestone outcrops, and has been found in caves during the dry season. Eleutherodactylus wixarika is a moderate sized species, most similar to E. teretistes, E. pallidus and E. modestus. It is distinguished from all other members of the subgenus by the combination a tuberculate, reddish dorsum, lack of compact lumbar glands, and expanded digital pads less than twice the width of the narrowest part of the digit. This species inhabits areas with secondary vegetation in pine forest. Males of both species call at night during the rainy season. The advertisement call of both species consists of a short, narrow band, pure-tone note organized into a discrete train at a rate of about six times per minute. Spectral and temporal acoustic properties differ between species. The subgenus Syrrhophus of the genus Eleutherodactylus is one of the most poorly studied groups of frogs in Mexico but probably one of the most diverse.
Resilience of sphyrna lewini, rhizoprionodon longurio, and Carcharhinus falciformis at the entrance to the Gulf of California after three decades of exploitation [Resiliencia de sphyrna lewini, rhizoprionodon longurio y carcharhinus falciformis en la entrada del golfo de California después de tres décadas de explotación]
Furlong-Estrada E.,Centro Universitario Of Ciencias Biologicas ropecuarias |
Tovar-Avila J.,Instituto Nacional Of Pesca |
Perez-Jimenez J.C.,Colegio de Mexico |
Rios-Jara E.,Centro Universitario Of Ciencias Biologicas ropecuarias
Ciencias Marinas | Year: 2015
Given their biological characteristics, sharks exhibit low resilience and thereby are considered a fishery resource particularly vulnerable to overfishing. Yet, for several decades, three shark species (Sphyrna lewini, Rhizoprionodon longurio, and Carcharhinus falciformis) have contributed consistently to the catches of the artisanal shark fishery at the entrance to the Gulf of California, showing a certain degree of resilience. The aim of this study was to estimate their capacity to recover from disturbances, based on their rebound potential (r2M), and analyze the factors that may be favoring their capacity to recover from fishing pressure in the region. Catch records, size composition of landings reported in previous studies and from undertaken surveys, as well as published information on life history parameters were used in the present analysis. Rhizoprionodon longurio showed high productivity (r2M= 0.083) and thus high resilience, whereas C. falciformis and S. lewini presented medium productivities (r2M= 0.053 and 0.062, respectively), but alternative scenarios to consider uncertainty in the life history parameters of C. falciformis and S. lewini placed them in the low productivity category. All species presented low productivity when the more conservative natural mortality (e.g., 1.25M) to achieve maximum sustainable yield was considered. Catches were dominated by juveniles of S. lewini, and by preadults and adults of R. longurio and C. falciformis during all the analyzed period; this and their consistent contribution to landings suggest apparent population stability. Such stability might be related to their biological productivity, elasticity, wide distribution range, migratory habits, and size segregation. Nonetheless, changes that occurred in this fishery over the last three decades may have also played an important role in the catch levels, particularly in the case of C. falciformis. Quantitative population assessments of these species to determine the optimum levels of extraction in the region are urgently needed. © 2015, Universidad Autonoma de Baja California. All rights reserved.