[Content and absorption of calcium in diets of Northwestern Mexico: a bibliographic retrospective].

Calcium is an essential mineral in humans for growth and development of bones and teeth. In adults, bone activity is limited to maintaining bone mass and in order to do this, an adequate intake of calcium is necessary. The objective of this study was to conduct a review of the information available in the literature on the content and availability of calcium in the diet in Northwestern Mexico.

Hypermethylation leads to silencing of the SYK gene in human breast cancer.

A number of cancer-associated genes have been shown to be inactivated by hypermethylation of CpG islands during breast tumorigenesis. SYK, a candidate tumor suppressor, has been found not expressed in a subset of breast cancer cell lines, but the mechanism by which SYK is silenced is unclear. In this study, we examined the 5' CpG island methylation status of the SYK gene in breast cancer cell lines and primary breast cancer tissues.

Translational control by CPEB: a means to the end.

The regulated translation of messenger RNA is essential for cell-cycle progression, establishment of the body plan during early development, and modulation of key activities in the central nervous system. Cytoplasmic polyadenylation, which is one mechanism of controlling translation, is driven by CPEB--a highly conserved, sequence-specific RNA-binding protein that binds to the cytoplasmic polyadenylation element, and modulates translational repression and mRNA localization. What are the features and functions of this multifaceted protein?

Endophthalmitis caused by Listeria monocytogenes.

Listeria monocytogenes was isolated from the aqueous chamber of an immunodepressed patient with acute hypertensive uveitis, who developed a dark hypopyon and pigment dispersion. No extraocular septic focus was found. Treatment was successful with intravitreal vancomycin, anterior chamber irrigation with vancomycin, orally administered ciprofloxacin, and topical fortified vancomycin.

The utility of serology in diagnosing candidosis in non-neutropenic critically ill patients.

This study was carried out to evaluate the utility of serological tests in the diagnosis of candidal infections in non-neutropenic critically ill patients. A prospective study was carried out in a 10-bed general intensive care unit; all patients with at least one organic sample with Candida spp. were included.

Carbon and nitrogen removal from a wastewater of an industrial dairy laboratory with a coupled anaerobic filter-sequencing batch reactor system.

A set of two reactors, an Anaerobic Filter (AF) of 12 m3 and a Sequencing Batch Reactor (SBR) of 28 m3, coupled in series, were used to treat the wastewaters from an industrial milk analysis laboratory. The characteristics of these effluents are similar to those discharged by dairy factories (average values around 10 kg COD/m3 and 0.20 kg N/m3).

Agenesis of the scrotum.

Congenital agenesis of the scrotum skin is an extremely rare disorder with only two cases previously reported. We report a newborn with scrotal agenesis and congenital hypothyroidism.

Aortic injury during diagnostic pediatric laparoscopy.

Major vascular injury during laparoscopic procedures is a rare but catastrophic complication. We report a pediatric case of aortic laceration during the setup phase of diagnostic laparoscopy in a 5-year-old girl with recurrent abdominal pain. The Veress needle inserted below the umbilicus confirmed the proper placement by use of a saline-filled syringe.

[Clinical patterns of soft-tissue sarcoma in children].

Introduction And Objectives: Soft tissue sarcomas are rare mesenchymal neoplasms that constitute less than 10% of all pediatric malignancies. Half of these are rhabdomyosarcomas, the remaining 50% have a varied and heterogenous histologic and clinical patterns (fibrosarcoma, synovial cell sarcoma, extraskeletal Ewing's sarcoma, angiosarcoma, liposarcoma, leiomyosarcoma, ..

Genome screening for linkage disequilibrium in a Costa Rican sample of patients with bipolar-I disorder: a follow-up study on chromosome 18.

Linkage disequilibrium (LD) methods offer great promise for mapping complex traits, but have thus far been applied sparingly. In this paper we describe an LD mapping study of severe bipolar disorder (BP-I) in the genetically isolated population of the Central Valley of Costa Rica. This study provides the first complete screen of a chromosome for a complex trait using LD mapping and presents the first application of a new LD mapping statistic (ancestral haplotype reconstruction (AHR)) that evaluates haplotype sharing among affected individuals.

Protein quality evaluation in rats of typical diets for 4- to 6-year-old children from different socioeconomic areas living in Oaxaca, Mexico.

Legumes and cereals are principal sources of energy and protein in developing countries. In Oaxaca, Mexico, corn is the primary agricultural crop, therefore corn tortillas and beans are the main energy and protein sources. The objective of this study was to evaluate the protein quality in rats of typical diets for 4- to 6-year-old children from different socioeconomic areas in Oaxaca, Mexico.

Simultaneous methanogenesis and denitrification of pretreated effluents from a fish canning industry.

A lab-scale hybrid upflow sludge bed-filter (USBF) reactor was employed to carry out methanogenesis and denitrification of the effluent from an anaerobic industrial reactor (EAIR) in a fish canning industry. The reactor was initially inoculated with methanogenic sludge and there were two different operational steps. During the first step (Step I: days 1-61), the methanogenic process was carried out at organic loading rates (OLR) of 1.

Simultaneous urea hydrolysis, formaldehyde removal and denitrification in a multifed upflow filter under anoxic and anaerobic conditions.

A multifed upflow filter (MUF), working under anoxic or anaerobic conditions, coupled with an aerobic biofilm airlift suspension (BAS) reactor was operated in order to treat a wastewater with high formaldehyde (up to 1.5 g L-1) and urea (up to 0.46 g L-1) concentrations.

[Diagnosis of hemochromatosis with magnetic resonance].

Hemochromatosis is a disorder of parenchymal iron overload. The diagnosis is based upon clinical manifestations, laboratory findings and iron concentration in liver. Magnetic resonance imaging (MRI) shows a decrease in liver signal intensity.

Safety and efficacy of tacrolimus in combination with mycophenolate mofetil (MMF) in cadaveric renal transplant recipients. FK506/MMF Dose-Ranging Kidney Transplant Study Group.

Background: Tacrolimus (FK506) is a safe and effective treatment for the prevention of rejection of renal allografts. Mycophenolate mofetil (MMF) has been used as adjunct immunosuppressive therapy with cyclosporine and corticosteroids for the same purpose. The objective of this study was to investigate the safety and efficacy of FK506 and MMF in renal transplant recipients.

Phosphorylation of CPEB by Eg2 mediates the recruitment of CPSF into an active cytoplasmic polyadenylation complex.

The release of Xenopus oocytes from prophase I arrest is largely driven by the cytoplasmic polyadenylation-induced translation of dormant maternal mRNAs. Two cis elements, the CPE and the hexanucleotide AAUAAA, and their respective binding factors, CPEB and a cytoplasmic form of CPSF, control polyadenylation. The most proximal stimulus for polyadenylation is Eg2-catalyzed phosphorylation of CPEB serine 174.

CPEB, maskin, and cyclin B1 mRNA at the mitotic apparatus: implications for local translational control of cell division.

In Xenopus development, the expression of several maternal mRNAs is regulated by cytoplasmic polyadenylation. CPEB and maskin, two factors that control polyadenylation-induced translation are present on the mitotic apparatus of animal pole blastomeres in embryos. Cyclin B1 protein and mRNA, whose translation is regulated by polyadenylation, are colocalized with CPEB and maskin.

The influence of donor age on kidney graft survival in the 1990s.

Based on analyses of the UNOS Registry data for cadaver kidney transplants performed between 1991-1999 we showed that: 1. 15-40 year old donor kidneys provided the best one-year graft survival rates. When donors were analyzed with recipients, younger (0-10) and older (70-90) donors and recipients (Table 2) had the lowest one-year graft success rates.

Regulation of ionotropic glutamate receptor subunits in different rat brain areas by a preferential sigma(1) receptor ligand and potential atypical antipsychotic.

The effect of chronic administration of the putative atypical antipsychotic E-5842, a preferential sigma(1) receptor ligand, on ionotropic glutamate receptor subunit levels of mRNA and protein, was studied. The repeated administration of E-5842 differentially regulated levels of the NMDA-2A and of GluR2 subunits in a regionally specific way. Levels of immunoreactivity for the NMDA-2A subunit were up-regulated in the medial prefrontal cortex, the frontoparietal cortex, the cingulate cortex, and in the dorsal striatum, while they were down-regulated in the nucleus accumbens.

Undiagnosed spondyloarthropathy in patients presenting with anterior uveitis.

Objective: To investigate patients with formerly undiagnosed underlying spondyloarthropathy (SpA) in a series of anterior uveitis (AU) cases and to describe the rheumatologic and ophthalmologic characteristics of these patients.

Methods: Patients with anterior uveitis referred to the Uveitis Clinic between January 1992 and December 1998 who had a final diagnosis of SpA were included in the study group. The diagnosis of SpA was based on current diagnostic criteria.

Kinetic study of addition of volatile organic compounds to a nitrifying sludge.

The effects of different concentrations of several volatile organic compounds (VOC) such as ethanol, acetate, propionate, and butyrate ranging from 0 to 2000 mg/L as well as a mixture of volatile fatty acids (MVFA) at a 4:1:1 (acetate:propionate:butyrate) ratio on the nitrification rate in batch cultures were studied. The results showed that ethanol and acetate were consumed in a mixotrophic way by the nitrifying sludge. At a concentration of 500 mg/L, the nitrification rate of inhibition was different for each compound in which propionate and butyrate were the most inhibitory.

[Mechanical and metabolic reproducibility of resistance test of expiratory muscles with incremental threshold loading].

Background: The study of respiratory muscle endurance has mainly focused on inspiratory muscles. A new method to measure expiratory muscle endurance, through incremental threshold loading using a weighted plunger valve, has recently been described.

Objectives: To evaluate the mechanical features of the plunger valve and the reproducibility of the method from the standpoint of both mechanics and metabolism.