Prevalence of sexually risky behaviors among Mexican medical students.

University students are at high risk of sexually transmitted infections due to the lack of adequate sexual education, as well as multiple associated factors, which lead to risky sexual practices. It is important to update data about sexual behaviors to identify the main factors associated with sexually risky behaviors. The present study aimed to evaluate the current prevalence of sexually risky practices in medical students.

Comparative genomic analysis of uropathogenic strains from women with recurrent urinary tract infection.

Introduction: Recurrent urinary tract infections (RUTIs) caused by uropathogenic are costly public health problems impacting patients' quality of life.

Aim: In this work, a comparative genomics analysis of three clinical RUTI strains isolated from bladder biopsy specimens was performed.

Materials And Methods: One hundred seventy-two whole genomes of urinary tract strains were selected from the NCBI database.

Geographical approach analysis of the impact of air pollution on newborn intrauterine growth and cord blood DNA damage in Mexico City.

Background: Few epidemiologic studies have focused on the specific source of ambient air pollution and adverse health effects in early life. Here, we investigated whether air pollutants from different emission sources were associated with decreased birth anthropometry parameters and increased DNA adduct formation in mother-child pairs residing in the Mexico City Metropolitan Area (MCMA).

Methods: This cross-sectional study included 190 pregnant women recruited during their last trimester of pregnancy from two hospitals at MCMA, and a Modeling Emissions Inventory (MEI) to calculate exposure to ambient air pollutants from different emissions sources (area, point, mobile, and natural) for two geographical buffers 250 and 750 m radii around the participants households.

Prevalence, causes, and clinical course of patients with surgical reintervention due to complications during cesarean section.

Objective: The objective of the study is to identify the prevalence, causes, and clinical evolution of patients with surgical reintervention due to complications during cesarean section.

Materials And Methods: The file of the Toco-Surgical Unit of the Gynecological Obstetrics Hospital No. 3 of the National Medical Center "La Raza" Mexican Institute of Social Security was reviewed to know the total number of patients undergoing cesarean section from January to December 2019 and cases with reintervention due to complications during cesarean section were selected.

The role of thrombophilias in reproduction: A swot analysis.

Thrombophilia is a group of inherited or acquired coagulation disorders that have been associated with reproductive failure. However, there are still no clear recommendations on whether its inclusion in the initial study of the infertile couple or patients with recurrent implantation failure is necessary. In this discussion paper, based on a SWOT (strengths, weaknesses, opportunities, threats) analysis, the different aspects of the repercussions of thrombophilia screening and treatment in reproduction are evaluated.

Pessary with perineal suture for treatment of pelvic organ prolapse: description and benefit of the technique.

Introduction And Hypothesis: Vaginal pessaries are used as a conservative treatment for POP in women who do not want or are not candidates for surgery, or as a preliminary step to surgery. Our goals are: evaluate the evolution of patients with advanced POP and repeated expulsion of the pessary, who underwent perineal suture to try to maintain the device. Describe the epidemiological characteristics of patients treated with pessaries in our environment, with or without perineal closure.

NOTCH expression variability and relapse of breast cancer in high-risk groups.

Background: In regards to breast cancer (BC), survival or disease-free periods are still compromised mainly in Triple Negative (TN) and HER2 tumors. The participation of estrogen receptor (ER) has been reported as crucial in the signaling pathways, including the NOTCH pathway. The study was aimed to evaluate the expression of NOTCH1 and NOTCH3 in BC and its relationship with the presence of ER, as well as with relapses.

Plasma colloid osmotic pressure in preeclampsia. Review of the Mexican literature 1997-2018.

En México, la presión coloidosmótica del plasma ha sido un tema clave del estudio de la mujer embarazada por más de dos décadas. Las investigaciones clínicas han permitido conocer sus valores en población abierta, mujeres con embarazo normal, puerperio fisiológico, preeclampsia severa, síndrome HELLP y eclampsia. También se ha reportado la relación de la presión coloidosmótica del plasma con la presión sanguínea (índice de Briones), síndrome de fuga capilar y la acumulación de líquido en cavidades serosas (derrame pleural, ascitis).

Endothelial dysfunction in children with chronic kidney disease.

Background And Objective: Cardiovascular disease (CVD) is the main cause of death in children with chronic kidney disease (CKD). Inflammation and endothelial dysfunction (ED) are found in the majority of these patients and are factors associated to CVD. Flow mediated dilatation (FMD) is a surrogate marker validated for evaluating ED.

Complicaciones de la histerectomía total laparoscópica en pacientes de un hospital de alta especialidad.

Objetivo: Describir las complicaciones transoperatorias y posoperatorias en pacientes operadas de histerectomía total laparoscópica.

MÉtodo: Serie de casos del servicio de ginecología de la Unidad Médica de Alta Especialidad Hospital de Gineco-Obstetricia No. 3 del Centro Médico Nacional La Raza, del Instituto Mexicano del Seguro Social, de las pacientes sometidas a histerectomía total laparoscópica de diciembre de 2015 a diciembre de 2018.

Efficacy of Docosahexaenoic Acid for the Prevention of Necrotizing Enterocolitis in Preterm Infants: A Randomized Clinical Trial.

Necrotizing enterocolitis (NEC) is an inflammatory bowel disease and a leading cause of morbidity and mortality in preterm infants. In this study, a randomized double-blind parallel-group (1:1) trial was carried out in two neonatal intensive care units of two tertiary hospitals. Two hundred and twenty-five preterm newborns with an expected functional gastrointestinal tract were recruited and received an enteral dose of 75 mg of docosahexaenoic acid (DHA)/kg body weight or high-oleic sunflower oil daily for 14 days from the first enteral feed after birth.

High Levels of Receptor Tyrosine Kinases in CCM3-Deficient Cells Increase Their Susceptibility to Tyrosine Kinase Inhibition.

Cerebral cavernous malformations (CCMs) are vascular malformations that can be the result of the deficiency of one of the CCM genes. Their only present treatment is surgical removal, which is not always possible, and an alternative pharmacological strategy to eliminate them is actively sought. We have studied the effect of the lack of one of the CCM genes, CCM3, in endothelial and non-endothelial cells.

Ruptured hepatic hematoma managed with a Sengstaken-Blakemore probe in severe preeclampsia with hemolysis, elevated liver enzymes, low platelets (HELLP) syndrome.

We report the case of a 34-year-old woman with a 32-week pregnancy complicated by recurrent severe preeclampsia, HELLP Class I syndrome, and an intact hepatic hematoma of the right lobe detected by ultrasound. During the cesarean section, the rupture of the hematoma occurred and a gastroesophageal probe of the Sengstaken-Blakemore type was placed to occlude the bleeding cavity and the exit tunnel. The balloons were deflated gradually and the probe was removed on the 10 day without complications.

Reduced mitochondrial DNA copy number is associated with the haplogroup, and some clinical features of breast cancer in Mexican patients.

Mitochondrial DNA (mtDNA) copy number and mitochondrial DNA haplogroups have been associated with different types of cancer, including breast cancer, because they alter cellular energy metabolism. However, whether mtDNA copy number or haplogroups are predictors of oxidative stress-related risks in human breast cancer tissue in Mexican patients remains to be determined. Using quantitative real-time PCR assays and sequencing of the mtDNA hypervariable region, analysis of mtDNA copy numbers in 82 breast cancer tissues (BCT) and matched normal adjacent tissues (NAT) was performed to determine if copy number correlated with clinical features and Amerindian haplogroups (A2, B2, B4, C1 and D1) .

ALWAYS ICSI? A SWOT analysis.

Purpose: Intracytroplasmatic sperm injection (ICSI) is a common procedure used to improve reproductive results, even among couples without male factor infertility. However, the evidence available is still uncertain on the possible advantages and deficiencies that this procedure may have in patients with no formal indication for ICSI.

Methods: A SWOT (strengths, weaknesses, opportunities, threats) analysis examines the possible advantages and deficiencies of performing ICSI in these patients with no formal indication.

Tumor-infiltrating regulatory T cells, CD8/Treg ratio, and cancer stem cells are correlated with lymph node metastasis in patients with early breast cancer.

Background: Tumor-infiltrating lymphocytes are an important component of the tumor microenvironment (TME) in breast cancer. They have been linked with tumor pathogenesis in advanced stages. However, little is known about their contribution in early phases.

Do we need to measure progesterone in oocyte donation cycles? A retrospective analysis evaluating cumulative live birth rates and embryo quality.

Study Question: Does late follicular-phase elevated serum progesterone (LFEP) during ovarian stimulation for oocyte donation have an impact on embryo quality (EQ) and cumulative live birth rate (CLBR)?

Summary Answer: LFEP does not have an influence on EQ nor CLBR in oocyte donation cycles.

What Is Known Already: Ovarian stimulation promotes the production of progesterone (P) which, when elevated during the follicular phase, has been demonstrated to have a deleterious effect in autologous fresh IVF outcomes. While there is robust evidence that this elevation results in impaired endometrial receptivity, the impact on EQ remains a matter of debate.

[Coronavirus disease 2019 and pregnancy].

Historically, viral respiratory infections in pregnant women have shown an increase in the risk of morbidity and mortality. With regards to COVID-19, information is limited and a greater risk of severe morbidity or mortality has not been shown, when compared to general population; however, pregnant women with comorbidities such as obesity, type 2 diabetes mellitus and hypertension have shown a greater severity of the disease, consistent with the general population with these comorbidities. The risk of vertical transmission appears to be low: it has not been demonstrated in any case during the current outbreak of COVID-19 in China, nor in previous epidemics of similar coronaviruses (SARS-CoV and MERS-CoV).

[Molecular diagnosis of breast cancer: prognostic and therapeutic implications].

Breast cancer is the most frequent type of cancer in women in the world. In Mexico, since 2006, this disease has become the leading cancer-related cause of death in women. It is estimated that incidence and mortality will continue to rise due to population aging, to changes in reproductive patterns, to a higher prevalence of risk factors and to limited access to medical care, resulting in delayed early diagnosis and timely treatment.

Severity of preeclampsia: data from a high specialty hospital in Mexico City.

IntroducciÓn: La severidad de la preeclampsia puede variar según la población en estudio.

Objetivo: Identificar la frecuencia y el tipo de datos de severidad de la preeclampsia en pacientes atendidas en una unidad médica de alta especialidad de la Ciudad de México.

Material Y MÉtodos: Estudio observacional, retrospectivo y transversal de una serie de 100 pacientes embarazadas con preeclampsia grave atendidas en un hospital de tercer nivel de la Ciudad de México, del 1 de agosto al 31 de diciembre de 2018.

[Treatment of postpartum arterial hypertension with losartan in severe preeclampsia].

Background: Postpartum hypertension increases the risk of acute and chronic complications in patients with preeclampsia. Losartan may be a useful drug alternative.

Objective: To determine the results of treatment of postpartum hypertension with losartan in patients with severe preeclampsia.

Prenatal exposure to particulate matter and ozone: Bulky DNA adducts, plasma isoprostanes, allele risk variants, and neonate susceptibility in the Mexico City Metropolitan Area.

Mexico City's Metropolitan Area (MCMA) includes Mexico City and 60 municipalities of the neighbor states. Inhabitants are exposed to emissions from over five million vehicles and stationary sources of air pollutants such as particulate matter (PM) and ozone. MCMA PM contains elemental carbon and organic carbon (OC).

Particulate matter-associated micronuclei frequencies in maternal and cord blood lymphocytes.

Studies associate particulate matter (PM) exposure with pulmonary, cardiovascular, and neurologic diseases. Elevated levels of coarse (PM10) and fine (PM2.5) PM have been reported in the Mexico City metropolitan area during the last two decades.