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"Quintero, Andres"
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Phenolic Compounds and Anthocyanins in Legumes and Their Impact on Inflammation, Oxidative Stress, and Metabolism: Comprehensive Review
by
Roldán-Flores, Luis Gustavo
,
Hernández-Ruiz, Rocio Guadalupe
,
Rivera-Leon, Edgar Alfonso
in
Adipose tissues
,
Animals
,
Anthocyanin
2025
Inflammation, oxidative stress, and metabolic diseases are intricately linked in a complex, self-reinforcing relationship. Inflammation can induce oxidative stress, while oxidative stress can trigger inflammatory responses, creating a cycle that contributes to the development and progression of metabolic disorders; in addition, these effects can be observed at systemic and local scales. Both processes lead to cellular damage, mitochondrial dysfunction, and insulin resistance, particularly affecting adipose tissue, the liver, muscles, and the gastrointestinal tract. This results in impaired metabolic function and energy production, contributing to conditions such as type 2 diabetes, obesity, and metabolic syndrome. Legumes are a good source of phenolic compounds and anthocyanins that exert an antioxidant effect—they directly neutralize reactive oxygen species and free radicals, reducing oxidative stress. In vivo, in vitro, and clinical trial studies demonstrate that these compounds can modulate key cellular signaling pathways involved in inflammation and metabolism, improving insulin sensitivity and regulating lipid and glucose metabolism. They also exert anti-inflammatory effects by inhibiting proinflammatory enzymes and cytokines. Additionally, anthocyanins and phenolics may positively influence the gut microbiome, indirectly affecting metabolism and inflammation.
Journal Article
The Effect of Dietary Interventions on Hypertriglyceridemia: From Public Health to Molecular Nutrition Evidence
by
Hernández-Ruiz, Rocío Guadalupe
,
Rodríguez-Reyes, Saraí Citlalic
,
Vizmanos, Barbara
in
blood lipids
,
blood serum
,
Carbohydrates
2022
Approximately 25–50% of the population worldwide exhibits serum triglycerides (TG) (≥150 mg/dL) which are associated with an increased level of highly atherogenic remnant-like particles, non-alcoholic fatty liver disease, and pancreatitis risk. High serum TG levels could be related to cardiovascular disease, which is the most prevalent cause of mortality in Western countries. The etiology of hypertriglyceridemia (HTG) is multifactorial and can be classified as primary and secondary causes. Among the primary causes are genetic disorders. On the other hand, secondary causes of HTG comprise lifestyle factors, medical conditions, and drugs. Among lifestyle changes, adequate diets and nutrition are the initial steps to treat and prevent serum lipid alterations. Dietary intervention for HTG is recommended in order to modify the amount of macronutrients. Macronutrient distribution changes such as fat or protein, low-carbohydrate diets, and caloric restriction seem to be effective strategies in reducing TG levels. Particularly, the Mediterranean diet is the dietary pattern with the most consistent evidence for efficacy in HTG while the use of omega-3 supplements consumption is the dietary component with the highest number of randomized clinical trials (RCT) carried out with effective results on reducing TG. The aim of this review was to provide a better comprehension between human nutrition and lipid metabolism.
Journal Article
Ray tracing optimization: a new method for intraocular lens power calculation in regular and irregular corneas
by
Aramberri, Jaime
,
Rozema, Jos J.
,
Quintero, Andrés Vásquez
in
692/699/3161/3168
,
692/699/3161/3174
,
Algorithms
2023
To develop a novel algorithm based on ray tracing, simulated visual performance and through-focus optimization for an accurate intraocular lens (IOL) power calculation. Custom-developed algorithms for ray tracing optimization (RTO) were used to combine the natural corneal higher-order aberrations (HOAs) with multiple sphero-cylindrical corrections in 210 higher order statistical eye models for developing keratoconus. The magnitude of defocus and astigmatism producing the maximum Visual Strehl was considered as the optimal sphero-cylindrical target for IOL power calculation. Corneal astigmatism and the RMS HOAs ranged from − 0.64 ± 0.35D and 0.10 ± 0.04 μm (0-months) to − 3.15 ± 1.38D and 0.82 ± 0.47 μm (120-months). Defocus and astigmatism target was close to neutral for eyes with low amount of HOAs (0 and 12-months), where 91.66% of eyes agreed within ± 0.50D in IOL power calculation (RTO vs. SRK/T). However, corneas with higher amounts of HOAs presented greater visual improvement with an optimized target. In these eyes (24- to 120-months), only 18.05% of eyes agreed within ± 0.50D (RTO vs. SRK/T). The power difference exceeded 3D in 42.2% while the cylinder required adjustments larger than 3D in 18.4% of the cases. Certain amounts of lower and HOAs may interact favourably to improve visual performance, shifting therefore the refractive target for IOL power calculation.
Journal Article
A Review of Caffeine Adsorption Studies onto Various Types of Adsorbents
by
Quintero-Jaramillo, Javier Andrés
,
Carrero-Mantilla, Javier Ignacio
,
Sanabria-González, Nancy Rocío
in
Activated carbon
,
Adsorbents
,
Adsorption
2021
A systematic literature review of publications from 2000 to 2020 was carried out to identify research trends on adsorbent materials for the removal of caffeine from aqueous solutions. Publications were retrieved from three databases (Scopus, Web of Science, and Google Scholar). Words “adsorption AND caffeine” were examined into titles, abstracts, and keywords. A brief bibliometric analysis was performed with emphasis on the type of publication and of most cited articles. Materials for the removal of caffeine were classified according to the type of material into three main groups: organic, inorganic, and composites, each of them subdivided into different subgroups consistent with their origin or production. Tables resume for each subgroup of adsorbents the key information: specific surface area, dose, pH, maximum adsorption capacity, and isotherm models for the removal of caffeine. The highest adsorption capacities were achieved by organic adsorbents, specifically those with granular activated carbon (1961.3 mg/g) and grape stalk activated carbon (916.7 mg/g). Phenyl-phosphate-based porous organic polymer (301 mg/g), natural sandy loam sediment (221.2 mg/g), composites of MCM-48 encapsulated graphene oxide (153.8 mg/g), and organically modified clay (143.7 mg/g) showed adsorption capacities lower than those of activated carbons. In some activated carbons, a relation between the specific surface area (SSA) and the maximum adsorption capacity (Qmax) was found.
Journal Article
A VCO-Based CMOS Readout Circuit for Capacitive MEMS Microphones
by
Perez, Carlos
,
Buffa, Cesare
,
Cardes, Fernando
in
Circuits
,
Internet of Things
,
MEMS microphone
2019
Microelectromechanical systems (MEMS) microphone sensors have significantly improved in the past years, while the readout electronic is mainly implemented using switched-capacitor technology. The development of new battery powered “always-on” applications increasingly requires a low power consumption. In this paper, we show a new readout circuit approach which is based on a mostly digital Sigma Delta ( Σ Δ ) analog-to-digital converter (ADC). The operating principle of the readout circuit consists of coupling the MEMS sensor to an impedance converter that modulates the frequency of a stacked-ring oscillator—a new voltage-controlled oscillator (VCO) circuit featuring a good trade-off between phase noise and power consumption. The frequency coded signal is then sampled and converted into a noise-shaped digital sequence by a time-to-digital converter (TDC). A time-efficient design methodology has been used to optimize the sensitivity of the oscillator combined with the phase noise induced by 1 / f and thermal noise. The circuit has been prototyped in a 130 nm CMOS process and directly bonded to a standard MEMS microphone. The proposed VCO-based analog-to-digital converter (VCO-ADC) has been characterized electrically and acoustically. The peak signal-to-noise and distortion ratio (SNDR) obtained from measurements is 77.9 dB-A and the dynamic range (DR) is 100 dB-A. The current consumption is 750 μ A at 1.8 V and the effective area is 0.12 mm 2 . This new readout circuit may represent an enabling advance for low-cost digital MEMS microphones.
Journal Article
Pharmacomicrobiomics and Drug–Infection Interactions: The Impact of Commensal, Symbiotic and Pathogenic Microorganisms on a Host Response to Drug Therapy
by
Gutiérrez-Hurtado, Itzae Adonai
,
Torres-Carrillo, Nora Magdalena
,
Martínez-López, Erika
in
Anti-Infective Agents - pharmacology
,
Anti-Infective Agents - therapeutic use
,
Bacteria
2023
Microorganisms have a close relationship with humans, whether it is commensal, symbiotic, or pathogenic. Recently, it has been documented that microorganisms may influence the response to drug therapy. Pharmacomicrobiomics is an emerging field that focuses on the study of how variations in the microbiome affect the disposition, action, and toxicity of drugs. Two additional sciences have been added to complement pharmacomicrobiomics, namely toxicomicrobiomics, which explores how the microbiome influences drug metabolism and toxicity, and pharmacoecology, which refers to modifications in the microbiome as a result of drug administration. In this context, we introduce the concept of “drug-infection interaction” to describe the influence of pathogenic microorganisms on drug response. This review analyzes the current state of knowledge regarding the relevance of microorganisms in the host’s response to drugs. It also highlights promising areas for future research and proposes the term “drug-infection interaction” as an extension of pharmacomicrobiomics.
Journal Article
SNDR Limits of Oscillator-Based Sensor Readout Circuits
by
Buffa, Cesare
,
Gutierrez, Eric
,
Cardes, Fernando
in
Noise
,
oscillator-based sensor
,
phase noise
2018
This paper analyzes the influence of phase noise and distortion on the performance of oscillator-based sensor data acquisition systems. Circuit noise inherent to the oscillator circuit manifests as phase noise and limits the SNR. Moreover, oscillator nonlinearity generates distortion for large input signals. Phase noise analysis of oscillators is well known in the literature, but the relationship between phase noise and the SNR of an oscillator-based sensor is not straightforward. This paper proposes a model to estimate the influence of phase noise in the performance of an oscillator-based system by reflecting the phase noise to the oscillator input. The proposed model is based on periodic steady-state analysis tools to predict the SNR of the oscillator. The accuracy of this model has been validated by both simulation and experiment in a 130 nm CMOS prototype. We also propose a method to estimate the SNDR and the dynamic range of an oscillator-based readout circuit that improves by more than one order of magnitude the simulation time compared to standard time domain simulations. This speed up enables the optimization and verification of this kind of systems with iterative algorithms.
Journal Article
Optimizing basil production and fertilizer use efficiency with consortia of plant growth-promoting bacteria
by
Estrada-Bonilla, German A.
,
Mendoza-Labrador, Jonathan A.
,
Quintero-Beyoda, Andres C.
in
Agricultural production
,
Agrochemicals
,
Azotobacter
2025
The basil, a widely cultivated aromatic plant, plays a crucial role in various industries but relies heavily on synthetic fertilizers, which contribute to environmental pollution. Plant growth-promoting bacteria (PGPB) offer a sustainable alternative to reduce reliance on synthetic fertilizers. In this study, three PGPB consortia and one single-strain inoculant were evaluated under reduced nitrogen and phosphorus fertilization to assess their effects on biomass production, photosynthetic efficiency, and nutritional quality. The results showed that consortium comprising Herbaspirillum sp., Azospirillum brasilense , and Rhizobium leguminosarum , as well as the consortium with Rhizobium sp. and Azotobacter chroococcum , significantly increased fresh biomass production–by over than 130%–compared to non-inoculated plants. Similarly, inoculation with 50% fertilization increased nitrogen and potassium uptake by over 50% compared to receiving the complete recommended fertilization without inoculation, while phosphorus uptake increased by more than 28% relative to the same control. These findings indicate that PGPB consortia offer not only an environmentally sustainable alternative to conventional fertilizers but also an effective strategy for enhancing biomass production and improving nutrient uptake in basil crops.
Journal Article
Genetic and Functional Characterization of STAT4 in Rheumatoid Arthritis Patients with Distinct Disease Activity
by
Landeros-Sáenz, Alejandra
,
Muñoz-Valle, José Francisco
,
Bravo-Villagra, Karla Mayela
in
Adult
,
Aged
,
Analysis
2025
Rheumatoid arthritis (RA) is characterized by chronic inflammation mediated by the JAK/STAT pathway. Variants in STAT4 have been associated with autoimmune susceptibility, but their functional role in RA remains unclear. The aim of this study was to genetically and functionally characterize STAT4 in RA patients with varying disease activity by analyzing two variants, mRNA expression, phosphorylated STAT4 (pSTAT4), and inflammatory cytokines (IL-12, IL-23, and IFN-γ). Sixty-three Mexican patients with RA were stratified into remission/low and moderate/high activity groups. Genotyping, STAT4 mRNA expression, pSTAT4 quantification, cytokine profiling, and treatment analyses were conducted. Patients receiving methotrexate, hydroxychloroquine, and sulfasalazine had higher IL-12 concentrations compared with those on other regimens. In remission/low activity patients, GC/GC carriers exhibited increased IL-12, PBMC levels, and anti-CCP antibodies, while GC/TT carriers in the moderate/high activity group showed distinct ESR values. Secondary analyses revealed that TT/TT carriers with STAT4 overexpression exhibited higher IFN-γ and IL-23 levels. IL-12 differences persisted among GC/GC carriers regardless of STAT4 expression status. In conclusion, these exploratory findings suggest potential interactions among STAT4 haplotypes, expression status, and treatment regimens influencing cytokine and inflammatory profiles in RA. However, due to the small subgroup sizes, the observed associations should be interpreted with caution and considered hypothesis-generating until validated in larger cohorts.
Journal Article
Methodological Aspects in Randomized Clinical Trials of Nutritional Interventions
by
Pérez-Guerrero, Edsaúl Emilio
,
Torres-Carrillo, Nora Magdalena
,
Martínez-López, Erika
in
Bias
,
Clinical medicine
,
Clinical trials
2022
Nutrition is an essential component when promoting human health. Without a doubt, improving the quality of one’s diet can improve one’s quality of life as a whole and help postpone the onset or control of many chronic diseases. The volume of publications in this field has increased in recent years, in line with increased awareness of the importance of nutrition in health; however, the quality of the evidence on which most nutritional guidelines are based remains low, due to errors in conducting nutritional interventions or because the information is primarily derived from observational studies. To enhance the evidence supporting clinical guidelines in nutrition, the quality of randomized clinical trials (RCT) based on nutritional interventions must be improved; nevertheless, due to their heterogeneous nature and a lack of specific guidelines for designing, performing, documenting, and reporting on this type of intervention, conducting a nutritional intervention is a real challenge. Following a review of the literature on the methodological and ethical standards, as well as four extensions of the CONSORT (Consolidated Standards of Reporting Trials) guidelines that should be considered when implementing a nutritional intervention, seven essential aspects were identified. The current narrative review includes definitions, examples, diagrams, and algorithms regarding aspects of the appropriate study design, the intervention of the control group, the randomization and blinding processes, the study population selection, as well as a description of the type of intervention and the personnel involved in carrying out the study in order to make the implementation of a nutritional intervention easier.
Journal Article