Porfirio Hernández

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Cervical cancer is caused by human papillomavirus (HPV) and is the most common cancer among Mexican women, but no population-based studies have reported the prevalence and determinants of HPV infection in Mexico. A population-based study was carried out between 1996 and 1999, based on an age-stratified random sample of 1,340 women with normal cytologic(More)
Lipolytic and oxidative changes were studied in two typical meat products from pork loin, dry-cured loin (DCL) and pickled-cured loin (PCL). Neither product registered changes in the percentages of the main lipid fractions: non polar lipids, phospholipids and cholesterol. However, in dry cured loin an important decrease was recorded in the main phospholipid(More)
Alloploidy, one of the most efficient evolutionary mechanisms in nature, has not been extensively exploited in plant breeding programmes. Many genomic combinations remain to be created by plant breeders, to be used directly as new crops or indirectly to widen the genetic basis of crops. The Triticeae tribe, to which wheat belongs, is among the botanical(More)
The activity of catalase in microbial growth-controlled and uncontrolled ground beef muscle (semimembranosus, SM) did not change (P>0.05) during 6-day storage at 4°C. Likewise, catalase activity in ground, beef SM and longissimus dorsi (LD), pork LD, and chicken breast (B) and thigh (T) muscles was not affected (P>0.05) by 2-month storage at -20°C, with or(More)
Three muscles with different oxidative pattern (m. longissimus dorsi, Ld; m. biceps femoris, Bf; m. triceps brachii, Tb) have been analysed for lipid composition and lipolytic activities. The results showed a relatively low lipid (around 30 g kg(-1)) and cholesterol (around 0.5 g kg(-1)) content being higher in the oxidative and intermediate muscles Tb and(More)
The PI3K/PTEN/Akt signaling pathway has emerged in recent years as a main player in human cancers, increasing proliferation and decreasing apoptosis of transformed cells, and thus becoming a potential target for therapeutic intervention. Our previous data have demonstrated that Akt-mediated signaling is of a key relevance in the mouse skin carcinogenesis(More)
BACKGROUND The prevalence of genetic alterations is different in primary carcinomas from the proximal colon when compared with carcinomas from the distal colorectum. The objective of this work was to explore the existence of possible differences in the informative weight of the risk of tumor recurrence provided by p53 immunostaining depending on the(More)
Pen housing has been proposed in rabbits as an alternative to standard-sized cages. Rabbits reared in pens show greater physical activity. This study investigated whether jump exercise could modify body composition, muscle biochemical and histological characteristics, and some meat quality traits, including the biomechanical properties of tendons. Male(More)
The effects of genetic line on intramuscular fat content, perirenal fat content, and activity of some enzymes involved in lipid metabolism were studied. One hundred twenty animals from 3 synthetic lines, A and V selected for litter size at weaning and R selected for growth rate between weaning and slaughter, were used in this experiment. One-half of the(More)
T lymphocyte counts in the peripheral blood, lymphocyte response to phytohaemagglutinin (PHA) and delayed hypersensitivity reactions were studied in ten patients with paroxysmal nocturnal haemoglobinuria (PNH). Delayed hypersensitivity was abnormal in most patients and in vitro studies revealed impaired lymphocyte transformation to PHA in 50 per cent of the(More)