Publications by authors named "Leiva R"

Article Synopsis
  • Smartphone-based fertility awareness methods that include home urinary hormonal testing are becoming increasingly popular for tracking fertility.
  • A study at a family practice revealed that a majority of women preferred a combination of cervical mucus and luteinizing hormone testing, with high confidence in serum progesterone tests.
  • The results indicate the method's usefulness in identifying ovulation issues and assessing treatment responses, suggesting a need for more research on its practical applications in fertility management.
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  • - Both oestrogen and progesterone play a role in delaying the onset of the fertile window during the first week of the menstrual cycle by affecting cervical mucus secretion.
  • - In an observational study of 88 women, findings showed that low oestrogen and high progesterone levels negatively influenced mucus secretion, thereby delaying fertility signs.
  • - The study highlighted that increased oestrogen concentrations significantly raised the chances of entering the fertile window, while higher levels of progesterone were associated with decreased fertility odds.
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  • Obstructive sleep apnea syndrome (OSAS) is linked to cardiovascular risk factors from metabolic syndrome, including obesity, hypertension, and insulin resistance.
  • A study aimed to determine how common metabolic syndrome is among adults with OSAS using various questionnaires and health assessments.
  • Results showed that 55.4% of OSAS patients had metabolic syndrome, with factors like obesity and high blood pressure significantly correlating with the severity of OSAS.
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Background: Hepatitis C virus (HCV) is a major cause of chronic liver disease, in which liver stiffness increases. Liver stiffness measurements (LSM) are therefore essential in diagnosing liver diseases and predicting disease development. The study objective was to perform a comprehensive prospective assessment of the liver before, after and 4 years after treatment for HCV, including an assessment of the long-term outcome of fibrosis, steatosis and inflammation.

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Background: Persons with opioid use disorders (OUD) and persons with substance use disorders (SUD) who inject substances have a reduced life expectancy of up to 25 years compared with the general population. Chronic liver diseases are a substantial cause of this. Screening strategies based on liver stiffness measurements (LSM) may facilitate early detection, timely intervention, and treatment of liver disease.

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Objective: To study whether the menstrual cycle has a circaseptan (7 days) rhythm and whether it is associated with the lunar cycle (also defined as the synodic month, it is the cycle of the phases of the Moon as seen from Earth, averaging 29.5 days in length).

Design: Cross-sectional study.

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  • Bovine leukemia virus (BLV) is a significant infection causing enzootic bovine leukosis, primarily spread via infected blood from carrier cattle to healthy ones.
  • A study conducted in Costa Rica from 2011 to 2018 found a 43.5% seropositivity rate in breeding bulls, with higher rates in Holstein and Jersey breeds, as well as older and dairy farm bulls compared to other groups.
  • For the first time in Costa Rica, BLV DNA was detected in bull semen, highlighting the need for regular screening and awareness of risk factors linked to the disease.
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Streptococcus dysgalactiae subsp. equisimilis (Sde) is a commensal bacterium of horses that causes opportunistic infections. The aim of the work was to study genotypic and phenotypic properties of the Sde strain related to equine neonatal mastitis.

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Background: At the start of the coronavirus disease 2019 (COVID-19) pandemic, in the absence of pharmaceutical interventions, countries resorted to containment measures to stem the spread of the disease. In this paper, we have conducted a global study using a sample of 46 countries to evaluate whether these containment measures resulted in unemployment.

Methods: We use a difference-in-differences (DID) specification with a heterogenous intervention to show the varying intensity effect of containment measures on unemployment, on a sample of 46 countries.

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Objectives: During normal menstrual cycles, serum levels of progesterone vary widely between cycles of same woman and between women. This study investigated the profiles of pregnanediol during the luteal phase.

Methods: Data stemmed from a previous multicenter prospective observational study and concerned 107 women (who contributed 326 menstrual cycles).

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Background And Aims: The recommended treatment duration of hepatitis C virus (HCV) genotype 1a (GT1a) infection with elbasvir/grazoprevir (EBR/GZR) in the presence of a high baseline viral load and resistance associated substitutions (RAS) is 16 weeks with ribavirin added. The objective of this study was to evaluate the real-world effectiveness of 12 weeks of EBR/GZR without ribavirin and regardless of baseline viral load and RAS testing.

Method: This retrospective, observational cohort study was performed at five Norwegian hospitals that did not systematically utilize RAS testing.

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  • Silica nanoparticles (SiNPs) from burning sugarcane may cause long-term kidney problems.
  • In a study, rats were given two sizes of SiNPs and showed signs of kidney damage and inflammation.
  • The damage continued even after the SiNPs were no longer given, suggesting they might be linked to chronic kidney disease in humans.
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Objective: Describe the relationship between basal body temperature (BBT) and pregnanediol-3 alpha-glucuronide (PDG, the urine metabolite of progesterone) across the menstrual cycle.

Design: Observational study.

Setting: Study carried out from 1996 to 1997 in eight European family planning clinics.

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Impaired glucocorticoid (GC) signaling is a significant factor in aging, stress, and neurodegenerative diseases such as Alzheimer's disease. Therefore, the study of GC-mediated stress responses to chronic moderately stressful situations, which occur in daily life, is of huge interest for the design of pharmacological strategies toward the prevention of neurodegeneration. To address this issue, SAMP8 mice were exposed to the chronic mild stress (CMS) paradigm for 4 weeks and treated with RL-118, an 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) inhibitor.

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Background: The standard pathways of testing and treatment for hepatitis C virus (HCV) infection in tertiary healthcare are not easily accessed by people who inject drugs (PWID). The aim of this study was to evaluate the efficacy of integrated treatment of chronic HCV infection among PWID.

Methods And Findings: INTRO-HCV is a multicenter, randomized controlled clinical trial.

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Unlabelled: Striving to be faithful to the moral core of medicine and to spiritual, moral, and social teaching of the church, Catholic physicians see their role as an extension of the healing ministry of Jesus. When faced with a situation in which a large number of gravely ill people are seeking care, but optimal treatment such as ventilation in intensive care unit cannot be offered to all because of scarcity of resources, Catholic physicians recognize the need to consider the common good and to assign a priority to patients for whom such treatments would be most probably lifesaving. Making these evaluations, physicians will use only objective medical criteria regarding the benefits and risks to patients and will be mindful that all persons deserve equal respect for their dignity.

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Purpose This study investigates the impact of an intensive case management program on sick leave days, permanent work incapacity levels and treatment costs for severe vocational injuries set up by the French National Insurance Fund in five health insurance districts. Methods The method employed relies on a four-step matching procedure combining Coarsened Exact Matching and Propensity Score Matching, based on an original administrative dataset. Average Treatment effects on the Treated were estimated using a parametric model with a large set of covariates.

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Evidence for Chagas disease reactivation (CDR) in rheumatologic patients under rheumatologic treatments (RTs) is scarce. To screen and follow-up patients with rheumatic diseases and concomitant Chagas disease under RT to detect CDR and to describe a possible relationship between CDR and specific RT. An observational, longitudinal, prospective, consecutive study was carried out between 2018 and 2020.

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Objectives: We aimed to calculate cumulative hepatitis C virus (HCV) treatment coverage among individuals enrolled in opioid agonist therapy (OAT) in Norway between 2013 and 2017 and to document the treatment transition to direct-acting antiviral (DAA) agents. Moreover, we aimed to describe adherence to DAAs in the same cohort.

Design: Prospective cohort, registry data.

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pharmacological inhibition of soluble epoxide hydrolase (sEH) reduces inflammatory diseases, including acute pancreatitis (AP). Adamantyl ureas are very potent sEH inhibitors, but the lipophilicity and metabolism of the adamantane group compromise their overall usefulness. Herein, we report that the replacement of a methylene unit of the adamantane group by an oxygen atom increases the solubility, permeability, and stability of three series of urea-based sEH inhibitors.

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The inhibition of the enzyme soluble epoxide hydrolase (sEH) has demonstrated clinical therapeutic effects in several peripheral inflammatory-related diseases, with 3 compounds in clinical trials. However, the role of this enzyme in the neuroinflammation process has been largely neglected. Herein, we disclose the pharmacological validation of sEH as a novel target for the treatment of Alzheimer's disease (AD).

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