High-Throughput Prediction of the Thermal and Electronic Transport Properties of Large Physical and Chemical Spaces Accelerated by Machine Learning: Charting the ZT of Binary Skutterudites.

Thermal and electronic transport properties are the keys to many technological applications of materials. Thermoelectric, TE, materials can be considered a singular case in which not only one but three different transport properties are combined to describe their performance through their TE figure of merit, ZT. Despite the availability of high-throughput experimental techniques, synthesizing, characterizing, and measuring the properties of samples with numerous variables affecting ZT are not a cost- or time-efficient approach to lead this strategy. The significance of computational materials science in discovering new TE materials has been running in parallel to the development of new frameworks and methodologies to compute the electron and thermal transport properties linked to ZT. Nevertheless, the trade-off between computational cost and accuracy has hindered the reliable prediction of TE performance for large chemical spaces. In this work, we present for the first time the combination of new ab initio methodologies to predict transport properties with machine learning and a high-throughput framework to establish a solid foundation for the accurate prediction of thermal and electron transport properties. This strategy is applied to a whole family of materials, binary skutterudites, which are well-known as good TE candidates. Following this methodology, it is possible not only to connect ZT with the experimental synthetic (carrier concentration and grain size) and operando (temperature) variables but also to understand the physical and chemical phenomena that act as driving forces in the maximization of ZT for p-type and n-type binary skutterudites.

A Methodology for Network Analysis to Improve the Cyber-Physicals Communications in Next-Generation Networks.

Cyber-physical systems allow creating new applications and services which will bring people, data, processes, and things together. The network is the backbone that interconnects this new paradigm, especially 5G networks that will expand the coverage, reduce the latency, and enhance the data rate. In this sense, network analytics will increase the knowledge about the network and its interconnected devices, being a key feature especially with the increment in the number of physical things (sensors, actuators, smartphones, tablets, and so on). With this increment, the usage of online networking services and applications will grow, and network operators require to detect and analyze all issues related to the network. In this article, a methodology to analyze real network information provided by a network operator and acquire knowledge of the communications is presented. Various real data sets, provided by Telecom Italia, are analyzed to compare two different zones: one located in the urban area of Milan, Italy, and its surroundings, and the second in the province of Trento, Italy. These data sets describe different areas and shapes that cover a metropolitan area in the first case and a mainly rural area in the second case, which implies that these areas will have different comportments. To compare these comportments and group them in a single cluster set, a new technique is presented in this paper to establish a relationship between them and reduce those that could be similar.

Evaluation of Strategies for the Development of Efficient Code for Raspberry Pi Devices.

The Internet of Things (IoT) is faced with challenges that require green solutions and energy-efficient paradigms. Architectures (such as ARM) have evolved significantly in recent years, with improvements to processor efficiency, essential for always-on devices, as a focal point. However, as far as software is concerned, few approaches analyse the advantages of writing efficient code when programming IoT devices. Therefore, this proposal aims to improve source code optimization to achieve better execution times. In addition, the importance of various techniques for writing efficient code for Raspberry Pi devices is analysed, with the objective of increasing execution speed. A complete set of tests have been developed exclusively for analysing and measuring the improvements achieved when applying each of these techniques. This will raise awareness of the significant impact the recommended techniques can have.

Molecular basis of insulin action.

Insulin is the main anabolic and anticatabolic hormone in mammals. The stimulatory effect of insulin on glucose uptake in muscle and adipose tissue is a consequence of the rapid translocation of GLUT4 glucose transporters from an intracellular site to the cell surface. The actions of insulin are initiated by hormone binding to its cell surface receptors. Insulin receptors are ligand-stimulated protein tyrosine kinases and phosphorylate a number of proteins, known as insulin receptor substrate proteins. Insulin resistance has been recognized as a main pathogenic factor in the development of type 2 diabetes, and has been associated with dyslipidemia, hypertension, endothelial dysfunction, inflammation and coagulative state. The current challenge is the study of impaired insulin signaling pathways leading to beta-cell dysfunction and its progression to type 2 diabetes, as well as control of chronic inflammation processes that may improve insulin action.

Common haplotypes of the C-reactive protein gene and circulating leptin levels influence the interindividual variability in serum C-reactive protein levels. The Segovia study.

C-reactive protein (CRP) is a marker of systemic inflammation significantly associated with an increased risk of cardiovascular disease in the general population. The aim of our current work was to study those clinical and genetic variables potentially associated with interindividual variability in serum CRP levels. A random sample of 844 participants (450 women, mean age 55 years) from a study carried out on the general Spanish population (The Segovia Study) was studied. Our results showed that age, gender, waist circumference, leptin, impaired glucose tolerance and smoking were the clinical variables significantly associated with variations in serum CRP levels. Among those, leptin showed the strongest association, explaining 11% of the interindividual variability in circulating CRP levels (p<0.001). To study the effect of genetic variants on serum CRP levels, 10 SNPs within the CRP locus were genotyped in 756 participants. Four of these SNPs (rs1417938, rs1800947, rs1130864, rs1205) were significantly associated with CRP levels after adjustment for clinical variables. Among the common haplotypes inferred from eight SNPs, two (CCATGCCT, p=0.025; CTATCCTT, p=0.004) explained 2.9% of the total variation in serum CRP. The results here reported show that 2.9% of the total variation in circulating CRP levels seems to be explained by genetics variations within CRP locus. Furthermore, serum leptin levels are strongly associated with serum CRP levels in our Spanish population.

Sex and body mass index specific regulation of blood pressure by CYP19A1 gene variants.

Sexual dimorphism in blood pressure (BP) regulation has been observed both in humans and experimental animals, and estrogens have been shown to contribute to this epidemiological observation. A key enzyme in determining estrogen levels is aromatase cytochrome P450. The aim of this study was to evaluate the role of the gene encoding aromatase, CYP19A1, as an independent risk factor for hypertension and its relationship with systolic and diastolic BP measures. We genotyped 2 polymorphisms within the CYP19A1 gene, IVS4 rs11575899 and 3'UTR rs10046, in 3448 individuals. In quantitative analysis, we observed significant associations between the 2 polymorphisms and BP values in women, being these associations dependent on BMI and independent of menopause status. The case-control analysis revealed that the most prominent associations were found for nonobese women in diastolic hypertension (DHT): the IVS4_22 and 3'UTR_11 are risk genotypes (OR=1.61, P=0.027 and OR=1.59, P=0.012, respectively), whereas IVS4_11 and 3'UTR_22 genotypes have a protective effect against DHT (OR=0.63, P=0.009, and OR=0.61, P=0.020, respectively). Haplotype analysis confirmed the above associations: among nonobese women the haplotype 21 is overrepresented in hypertensive women (OR=1.33, P=0.004, for DHT and OR=1.25, P=0.026, for systolic hypertension, SHT) and, conversely, the haplotype 12 protects against hypertension (OR=0.78, P=0.015 for DHT and OR=0.82, P=0.04 for SHT). Our study has shown that the CYP19A1 gene may be involved in the genetic regulation of BP in women. This effect is dependent on BMI and independent of menopause status, suggesting that this action is mainly driven by aromatase activity in fat tissue.

Lipodystrophy and metabolic syndrome in HIV-infected patients treated with antiretroviral therapy.

Lipodystrophy (lipo) and metabolic derangements associated with an increased cardiovascular risk are observed frequently in human immunodeficiency virus (HIV)-infected patients who receive antiretroviral treatment (ART). The objective of the study was to provide detailed biochemical information about metabolic syndrome in this condition. One hundred forty-six HIV-infected male and female patients on ART for more than 6 months were compared with 156 body mass index (BMI)-matched healthy subjects. Lipodystrophy was diagnosed upon patient and physician concordance. Metabolic syndrome was defined according to the Adult Treatment Panel III criteria. Plasma adiponectin (AD) and leptin were measured by radioimmunoassay. Insulin resistance (IR) was assessed by the homeostasis model assessment (HOMA). The prevalence of metabolic syndrome was higher in HIV-infected patients on ART than in non-HIV-infected healthy controls (15.8% vs 3.2%; P < .001). Patients with metabolic syndrome are older (44.6 +/- 6 vs 39.8 +/- 8 years; P = .004), have an increased BMI (24.9 +/- 3.8 vs 22.9 +/- 9.8 kg/m(2); P = .01), present with a reduced AD-to-leptin ratio log(10) (-0.19 +/- 0.4 vs 0.5 +/- 0.4; P = .04), and show increased IR (HOMA, 5.6 +/- 2.7 vs 3.8 +/- 2.2; P = .001; plasma fasting insulin, 22.9 +/- 9.8 vs 16.6 +/- 9.7 ng/mL; P < .001). In multivariate analysis, the diagnosis of lipo and HOMA were independently and significantly related to metabolic syndrome. In conclusion, the prevalence of metabolic syndrome is significantly increased in HIV-infected patients on ART and its presence is associated with lipo, increased age and BMI, IR, and a reduced plasma AD-to-leptin ratio.

[Prevalence of the metabolic syndrome (ATP-III criteria). Population-based study of rural and urban areas in the Spanish province of Segovia]. / Prevalencia del síndrome metabólico (criterios del ATP-III). Estudio de base poblacional en áreas rural y urbana de la provincia de Segovia.

BACKGROUND AND OBJECTIVE: We aimed to estimate the prevalence of the Metabolic Syndrome (MS) in rural and urban areas of the Province of Segovia, Spain, according to the ATPIII criteria (National Cholesterol Education Program's Adults Treatment Panel III report) modified. SUBJECTS AND METHOD: Cross-sectional design. Randomized and representative sample of 809 individuals (46% males) aged 35-74 years. Residents in urban and rural areas of the Province of Segovia (Spain). Period of study from January 2000 to January 2003. RESULTS: The age/sex standardized prevalence of the MS was 17%; 15.7% in males and 18.1% in females. No significant differences in MS prevalence between rural and urban areas were found. The most frequent combination of individual components of MS was abdominal obesity, hyperglycemia and arterial hypertension in males and females. MS was associated with age and obesity in an adjusted logistic regression model. In a second model, abdominal obesity was more common in those individuals with a BMI over 30 kg/m2, secondary education level, age over 45 years, and in female residents in rural areas. CONCLUSIONS: The sex/age adjusted prevalence was lower than that reported in other studies using the ATPIII criteria in Spain. Abdominal obesity was the most frequent single component of MS in females whereas it was arterial hypertension in males.

Prevalencia del síndrome metabólico (criterios del ATP-III). Estudio de base poblacional en áreas rural y urbana de la provincia de Segovia / Prevalence of the metabolic syndrome (ATP-III criteria). Population-based study of rural and urban areas in the Spanish province of Segovia

Fundamento y objetivo: Estimar la prevalencia del síndrome metabólico (SM) en áreas rural y urbana de Segovia (España), según los criterios del ATP-III (National Cholesterol Education Program's Adults Treatment Panel III Report) modificados. Sujetos y método: Estudio transversal realizado con una muestra aleatoria y representativa formada por 809 individuos (un 46% varones) de 35 a 74 años de edad residentes en áreas rural y urbana de la provincia de Segovia (España). El período de estudio fue de enero de 2000 a enero de 2003. Resultados: La prevalencia global del SM ajustada por edad y sexo fue del 17% (un 15,7% en varones y un 18,1% en mujeres) y no se observaron diferencias entre las poblaciones de las áreas rural y urbana. La combinación de componentes del SM más frecuente, tanto en varones como en mujeres, fue la de obesidad abdominal, glucosa alterada en ayunas e hipertensión arterial. La prevalencia de SM se asoció a la edad y a la obesidad en un modelo de regresión logístico multivariado. En otro modelo, la obesidad abdominal fue más frecuente en los individuos con obesidad, definida por un índice de masa corporal de 30 kg/m2 o mayor, en aquellos con estudios secundarios, o con edad superior a 45 años y en las mujeres residentes en el área rural. Conclusiones: La prevalencia global ajustada por sexo/edad fue menor que la obtenida en otros estudios con los mismos criterios de definición de SM (ATP-III), lo que induce a pensar en la existencia de diferencias geográficas en España. La obesidad abdominal fue el componente aislado del SM de mayor prevalencia en mujeres, mientras que la hipertensión arterial lo fue en varones

Background and objective: We aimed to estimate the prevalence of the Metabolic Syndrome (MS) in rural and urban areas of the Province of Segovia, Spain, according to the ATPIII criteria (National Cholesterol Education Program's Adults Treatment Panel III report) modified. Subjects and method: Cross-sectional design. Randomized and representative sample of 809 individuals (46% males) aged 35-74 years. Residents in urban and rural areas of the Province of Segovia (Spain). Period of study from January 2000 to January 2003. Results: The age/sex standardized prevalence of the MS was 17%; 15.7% in males and 18.1% in females. No significant differences in MS prevalence between rural and urban areas were found. The most frequent combination of individual components of MS was abdominal obesity, hyperglycemia and arterial hypertension in males and females. MS was associated with age and obesity in an adjusted logistic regression model. In a second model, abdominal obesity was more common in those individuals with a BMI over 30 kg/m2, secondary education level, age over 45 years, and in female residents in rural areas. Conclusions: The sex/age adjusted prevalence was lower than that reported in other studies using the ATPIII criteria in Spain. Abdominal obesity was the most frequent single component of MS in females whereas it was arterial hypertension in males

Variation in the eNOS gene modifies the association between total energy expenditure and glucose intolerance.

Endothelium-derived nitric oxide (NO) facilitates skeletal muscle glucose uptake. Energy expenditure induces the endothelial NO synthase (eNOS) gene, providing a mechanism for insulin-independent glucose disposal. The object was to test 1) the association of genetic variation in eNOS, as assessed by haplotype-tagging single nucleotide polymorphisms (htSNPs) with type 2 diabetes, and 2) the interaction between eNOS haplotypes and total energy expenditure on glucose intolerance. Using multivariate models, we tested associations between eNOS htSNPs and diabetes (n = 461 and 474 case and control subjects, respectively) and glucose intolerance (two cohorts of n = 706 and 738 U.K. and Spanish Caucasians, respectively), and we tested eNOS x total energy expenditure interactions on glucose intolerance. An overall association between eNOS haplotype and diabetes was observed (P = 0.004). Relative to the most common haplotype (111), two haplotypes (121 and 212) tended to increase diabetes risk (OR 1.22, 95% CI 0.96-1.55), and one (122) was associated with decreased risk (0.58, 0.39-0.86). In the cohort studies, no association was observed between haplotypes and 2-h glucose (P > 0.10). However, we observed a significant total energy expenditure-haplotype interaction (P = 0.007). Genetic variation at the eNOS locus is associated with diabetes, which may be attributable to an enhanced effect of total energy expenditure on glucose disposal in individuals with specific eNOS haplotypes. Gene-environment interactions such as this may help explain why replication of genetic association frequently fails.

The Arg64 allele of the beta 3-adrenoceptor gene but not the -3826G allele of the uncoupling protein 1 gene is associated with increased leptin levels in the Spanish population.

To determine whether there are variations in leptin levels according to the beta(3)-adrenoceptor (beta(3)-AR) Trp64Arg and uncoupling protein 1 (UCP1) -3826A-->G polymorphisms, given the regulatory role of catecholamines through the beta(3)-AR in leptin production and the previously reported association of the UCP1 -3826A-->G variant with obesity. A total of 160 men and 172 women randomly chosen from a nationwide population-based obesity cross-sectional survey in Spain were studied. Body mass index (BMI), waist-to-hip ratio (WHR), leptin, insulin, fasting and 2-hour post-glucose load glycemia, high-density lipoprotein (HDL)-, low-density lipoprotein (LDL)-, and total cholesterol, and triglyceride plasma levels were measured. beta(3)-AR Trp64Arg and UCP1 -3826A-->G genotypes were determined by restriction fragment length polymorphism-polymerase chain reaction (RFLP-PCR). UCP1 -3826G allele frequency was higher in men than in women (0.31 v 0.22, P = .015) and in obese women than in non-obese women (0.31 v 0.17, P = .008). Women carriers of the Arg64 or the alleles also showed higher leptin levels than noncarriers. Multiple linear regression analysis showed that the Arg64 allele is associated with higher leptin levels after the adjustment for gender, age, WHR, and the degree of glucose tolerance. In conclusion, the beta(3)-AR Trp64Arg polymorphism might have an impact on the mechanisms involved in leptin release from adipose tissue. Furthermore, our results agree with the previously reported association between UCP1 -3826G allele and obesity and point to a gender-related effect.

K121Q PC-1 gene polymorphism is not associated with insulin resistance in a Spanish population.

OBJECTIVE: To investigate the effect of the K121Q plasma cell membrane glycoprotein (PC-1) polymorphism on the components of the insulin resistance syndrome in a population-based nationwide multicenter study in Spain. RESEARCH METHODS AND PROCEDURES: The subjects of the study were 293 nonrelated adults (44.7% men and 55.3% women) ages 35 to 64 years randomly chosen from a nationwide population-based survey on obesity and related conditions, including insulin resistance and cardiovascular risk factors. Obesity-related anthropometric measurements included blood pressure, oral glucose tolerance test, lipid profile (total cholesterol, high-density lipoprotein- and low-density lipoprotein-cholesterol, and triglycerides), plasma leptin, insulin levels by radioimmunoassay, and insulin resistance (homeostasis model assessment). K121Q PC-1 genotypes were determined by restriction fragment-length polymorphism-polymerase chain reaction. RESULTS: Overall Q allele frequency was 0.14, with no differences between obese and nonobese individuals (0.15 vs. 0.13). After adjustment for sex, age, BMI, and degree of glucose tolerance, the Q allele was associated with high plasma leptin and triglyceride levels, but not with insulin resistance. DISCUSSION: The results showed that the K121Q PC-1 polymorphism in the Spanish population has no significant impact on insulin sensitivity.

[High-risk human papilloma virus and cervical intraepithelial neoplasia in women at 2 hospitals in Mexico City]. / Virus de papiloma humano de alto riesgo (VPH-AR) y neoplasia intraepitelial cervical (NIC) en mujeres de dos hospitales de la Ciudad de México.

OBJECTIVE: To determine the high risk HPV (HR-HPV) association with Cervical Intraepithelial Neoplasia (CIN) in women of two Dysplasia Clinics in Mexico City. MATERIAL AND METHODS: Prolective case-control study was done. Women with and without security affiliation attended in Instituto Mexicano del Seguro Social (Hospital 1) and Hospital General de México (Hospital 2) were included in the study. Cases were women with histopathologic diagnosis of CIN and controls were women with negative dysplasia in cytologic study (Pap). Information was obtained by direct interview. HR-HPV was determined by Hybrid Capture II assay, in cervical samples. Bivariate and logistic regression analysis was done. RESULTS: One hundred and two cases and 192 controls from Hospital 1 and 89 cases and 66 controls from Hospital 2 were included. 83.3% and 77.3% of women from Hospital 1 and 2 respectively were positive to HR-HPV. The association HR-HPV and CIN in Hospital 1 was ORa = 40.6, C.I. 95% = 17-96.8; while in Hospital 2 there was not association. Age was an effect modifier in the HR-HVP and CIN association, in Hospital 1. It was observed a correlation between viral load and CIN degree. CONCLUSIONS: The HR-HPV infection frequency in controls and CIN I was higher than the reported in other studies. Age was a modifier in the HR-HPV association and CIN. In dysplasia clinics without medical referral system of patients is possible to observe similar risk factors to cervical cancer.

[Topical 5-fluorouracil for treatment of vaginal intraepithelial neoplasms]. / 5-fluorouracilo tópico en el tratamiento de la neoplasia intraepitelial vaginal.

OBJECTIVE: Our purpose was to determine the effectiveness of 5-fluorouracil (5-FU) in the treatment of vaginal intraepithelial neoplasia (VAIN). MATERIALS AND METHODS: The study was performed in 30 patients with a mean age of 54 years and previous diagnoses from reviewed records and histopathology slides selected from a group of 65 patients with VAIN from 1980 to 1998. Patients received intravaginal treatment with 5-FU, 1.5 g once weekly for 10 weeks and all patients were followed up for at least 2-years. Papanicolaou smear and colposcopy were performed, as was biopsy when indicated. RESULTS: Twenty eight (93%) patients with VAIN had prior or concurrent anogenital squamous neoplasia, including 5 with invasive cervical carcinoma and 23 with cervical intraepithelial neoplasia. In 23 of 30 treated patients (77%), VAIN went into remission after a single treatment; in 3, (10%), it went into remission after two treatment; 3 (10%) had recurrent VAIN 3; and in 1 (3%) it progressed to invasive vaginal cancer. The treatment was well tolerated. CONCLUSIONS: The 5-FU is an option choice for VAIN treatment. It is effective, with minimal slide effects. Its use should be confined to treating extensive or multifocal high-grade VAIN.

Virus de papiloma humano de alto riesgo (VPH-AR) y neoplasia intraepitelial cervical (NIC) en mujeres de dos hospitales de la Ciudad de México / High-risk human papilloma virus and cervical intraepithelial neoplasia in women at 2 hospitals in Mexico City

OBJECTIVE: To determine the high risk HPV (HR-HPV) association with Cervical Intraepithelial Neoplasia (CIN) in women of two Dysplasia Clinics in Mexico City. MATERIAL AND METHODS: Prolective case-control study was done. Women with and without security affiliation attended in Instituto Mexicano del Seguro Social (Hospital 1) and Hospital General de MÚxico (Hospital 2) were included in the study. Cases were women with histopathologic diagnosis of CIN and controls were women with negative dysplasia in cytologic study (Pap). Information was obtained by direct interview. HR-HPV was determined by Hybrid Capture II assay, in cervical samples. Bivariate and logistic regression analysis was done. RESULTS: One hundred and two cases and 192 controls from Hospital 1 and 89 cases and 66 controls from Hospital 2 were included. 83.3 and 77.3 of women from Hospital 1 and 2 respectively were positive to HR-HPV. The association HR-HPV and CIN in Hospital 1 was ORa = 40.6, C.I. 95 = 17-96.8; while in Hospital 2 there was not association. Age was an effect modifier in the HR-HVP and CIN association, in Hospital 1. It was observed a correlation between viral load and CIN degree. CONCLUSIONS: The HR-HPV infection frequency in controls and CIN I was higher than the reported in other studies. Age was a modifier in the HR-HPV association and CIN. In dysplasia clinics without medical referral system of patients is possible to observe similar risk factors to cervical cancer.

[High and low risk human papilloma virus infection in women with CIN. Differential characteristics]. / Infección por virus del papiloma humano de alto y bajo riesgo en mujeres con NIC. Características diferenciales.

UNLABELLED: The objective of this study was to determine high risk human papillomavirus infection (HPV-RH) and factors with cervical intraepithelial neoplasia appears (CIN). MATERIAL AND METHOD: From October 1998 to January 2000, a case-control study, was made; women with benefit package from Mexican Institute of Social Security. The cases were of the colposcopic clinic of the department of the Hospital Obstetrics and Gynecology Luis Castelazo Ayala, women histologically diagnosed with colposcopy and CIN cervical biopsy, and controls patients with negative cervical uterine cytologic study of the Preventive Medicine Department, Unit of Familiar Medicine No. 8, of Mexico City. Trained personnel obtained information about socioeconomic and reproductive factors did the interview. A cytobrush was used to take the cervical sample for HPV-RH to determine HPV-RH utilizing Hybrid Capture II test. Both bivariate analysis and logistic regression analysis were used for the adjustment of variables. RESULTS: We analyzed 102 cases and 192 controls, 79% (44/56) of the cases with CIN I and 89% (37/42) of CIN II-III as 21% of controls, respectively, were positive for HPV-RH. Global risk for HPV-RH association to CIN was OR = 40.6 (95% CI, = 17-96.8). Women age was determinative for HPV-RH association to CIN. We observed a high correlation between HPV positive magnitude and CIN degree. CONCLUSIONS: Frequency of RH-HPV in controls and CIN I is higher than other reports in the literature. HPV was identified as the most important agent associated with this neoplasia, other factors involved and age is an important modifier in HPV-RH and CIN.

Valor de los receptores a estrógena en el manejo de las lesiones escamosas intraepiteliales de bajo grado / Value of estrogen receptors and progesterone receptors on the management of low grade squamous intraepithelial lesions

Objetivo. Determinar el valor pronóstico de los receptores a estrógeno y a progesterona positivos (RE+, RP+) en el manejo de las lesiones escamosas intraepiteliales (LEI) de bajo grado [(LEIBG), virus del papiloma humano (VPH) y neoplasia intraepitelial grado 1 (NIC 1) y estado menopáusico. Material y métodos. De enero de 1995 a enero de 1999, en 144 mujeres con citología anormal a neoplasia intraepitelial cervical (NIC) grados 1, 2 y 3, solo o asociado al virus del papiloma humano (VPH), se les realizó colposcopía y se procedió a tomar dos biopsias de la lesión sospechosa, las cuales se enviaron a estudio histopatológico y de receptores hormonales por la técnica del carbón cubierto con dextrán, los cuales posteriormente se correlacionaron entre sí y con el estado menopáusico. Se utilizó chi cuadrada como método estadístico. Resultados. En cérvix normal, 89 por ciento y 60 por ciento de los especímenes fueron RE+, RP+ respectivamente (+6 fmol/mg proteína). Los niveles de RE+ fueron significativamente más altos en cérvix normal respecto a VPH y grados de NIC, (P < 0.003), no así para niveles de RP+ en que no hubo diferencia estadísticamente significativa (P > 0.53). Respecto a las pacientes premenopáusicas y posmenopáusicas no hubo diferencia significativa en los niveles de RE positivos, (P > 0.27) y en cambio para RP sí la hubo (P< 0.04). Niveles de receptores RE+, RP+, no se correlacionaron al no mostrar diferencia significativa en relación a VPH o grados de NIC, como con el estado menopáusico (P > 0.35, > 0.97, respectivamente). Conclusión. Las mujeres con niveles de RE' fueron significativamente altos en cérvix normal cuando había LEI no mostrando los niveles de RE+, RP+ valor pronóstico en el manejo clínico de LEIBG y el estado menopáusico.

Correlación citológica con el sistema Bethesda y la biopsia dirigida por colposcopia / Citologic correlation with Bethesda System and biopsy directed by coposcopy

El Sistema Bethesda es útil en el diagnóstico citológico de las lesiones premalignas del cérvix. Se determinó la correlación existente entre el reporte citológico en el sistema Bethesda y el del Indice Colposcópico Combinado (IIC) de Reids, para el diagnóstico de las lesiones premalignas del cérvix mediante el diagnóstico histológico de la biopsia dirigida por colposcopia. Se estudiaron a 118 pacientes que acudieron a la clínica de colposcopia por presentar una citología anormal a neoplasia intraepitelial cervical, sola o asociado al virus del papiloma humano. A todas se les tomó en su primera consulta una nueva citología cervical, se les realizó colposcopia y se tomó una biopsia dirigida. Se analizaron los hallazgos para citología con el Sistema Bethesda y los colposcópicos con el ICC de Reid, mediante el diagnóstico histológico de la biopsia dirigida por colposcopia fue de 98.5 por ciento para 82 pacientes con lesiones escamosas intraepiteliales de bajo grado con una concordancia de 100 por ciento para el VPH y 97 por ciento para el NIC I(p<0.05). En cambio para las lesiones escamosas intraepiteliales y de alto grado correlacionó el 92 por ciento de 36 pacientes con una concordancia de 84 por ciento para el NIC II y 100 por ciento para el NIC III (p<0.05). con una sensibilidad de 93 por ciento, una especificidad y un valor predictivo positivo de 96 por ciento, así como un valor predictivo negativo de 98 por ciento. Se concluye que hay correlación del reporte citológico con el Sistema Bethesda y el Indice colposcópico combinado de Reid, por lo tanto, confiables en el diagnóstico de las lesiones premalignas del cérvix

Receptores a estradiol en neoplasia intraepitelial cervical y cáncer cervicouterino / Receptors to estradiol in cervical intraephitelial neoplasia and cervicouterine cancer

Se ha mencionado que los receptores a estradiol (R-E) podrían ser indicador pronóstico en cáncer de cérvix con mayor supervivencia en pacientes con receptores positivos. El objetivo del presente estudio fue observar si hay correlación en el contenido de (R-E) en biopsias de pacientes pre y posmenopáusicas, en cérvix normal, con neoplasia intraepitelial cervical (NIC) y cáncer invasor. De enero a agosto de 1995 se estudiaron 34 pacientes que acudieron al servicio de colposcopía con el diagnóstico de citología anormal a NIC, a todas se les realizó colposcopia y se procedió a tomar dos biopsias de la lesión sospechosa, las cuales se enviaron a estudio histopatológico y el otro fragmento a receptores estrogénicos, los cuales posteriormente se correlacionaron tanto en diagnóstico histológico como en los valores de los receptores a estradiol en fmol/g de tejido. Se observó que la concentración de (R-E) es más alta en las lesiones intraepiteliales de bajo y alto grado que en las pacientes control, no así en la premenopáusicas con cáncer invasor donde los (R-E) son considerablemente más bajos, respecto a las posmenopáusicas la concentración (R-E) es más alta principalmente en el cáncer invasor. Se concluye que el estudio en la cuantificación a (R-E) en patología cervical podría permitir contar con una alternativa promisoria para el tratamiento hormonal, como la ha sido en patología mamaria, para lo cual deberán realizarse las investigaciones pertinentes.