: Rocky Mountain spotted fever (RMSF) is an ongoing public health crisis in Mexico, particularly in states bordering the United States. The national highest incidence and mortality of RMSF occur in this region, resulting in a case-fatality rate that ranges annually between 10% and 50%, primarily affecting vulnerable groups such as children, elderly adults, and persons living in poverty. Multiple biological, environmental, and social determinants can explain its growing presence throughout the country and how it challenges the health system and society. It is necessary to integrate resources and capacities from health authorities, research centers, and society to succeed in dealing with this problem. Through a scientific symposium, a group of academicians, U.S. health officials, and Mexican health authorities met on November 8–10, 2023, in Hermosillo, Mexico, to discuss the current situation of RMSF across the country and the challenges associated with its occurrence. An urgent call for action to improve national capacity against RMSF in the aspects of epidemiological and acarological surveillance, diagnosis, medical care, case and outbreak prevention, health promotion, and research was urged by the experts. The One Health approach is a proven multidisciplinary strategy to integrate policies and interventions to mitigate and prevent the burden of cases, deaths, and suffering caused by RMSF in Mexico.

We synthesized silver nanoparticles using Rumex hymenosepalus root extract (Rh). Nanoparticles were subjected to a purification process and final product is a composite of Rh and silver nanoparticles (AgNPsC). Transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were used to perform a microstructure study. Additionally, two fractions (RhA and RhB) were obtained from the original extract by filtration with tetrahydrofuran (THF); both fractions were analyzed using UV-Vis spectroscopy, Fourier transform infrared spectroscopy (FT-IR), and 2,2-diphenyl-1-picrylhydrazyl (DPPH); total polyphenol content was also determined. Separate inhibition tests for AgNPsC and RhA and RhB were applied to Gram-positive bacteria, Gram-negative bacteria, and yeast (Candida albicans) using the well diffusion method. Extract fractions were found to have inhibitory effects only over Gram-positive bacteria, and silver nanoparticles showed inhibitory effects over all the evaluated microorganisms. Cytotoxicity was evaluated using the tetrazolium dye (MTT) assay in mononuclear peripheral blood cells. In addition, we assessment AgNPsC in THP-1 monocyte cell line, using the cell viability estimation by trypan blue dye exclusion test (TB) and Live/Dead (LD) cell viability assays by confocal microscopy.

Ferroptosis, an iron-dependent form of regulated cell death characterized by lipid peroxidation, has emerged as a critical process in various diseases. MicroRNAs (miRNAs), small non-coding RNAs that regulate gene expression, are increasingly recognized as key modulators of ferroptosis pathways. This systematic review aims to provide a comprehensive overview of the current knowledge regarding miRNAs implicated in ferroptosis across a spectrum of diseases. We conducted a systematic search of EMBL-EBI, PubMed, Scopus, and Web of Science databases to identify relevant studies published up to October 31, 2022. Our search strategy identified 127 articles encompassing 107 distinct miRNAs that influence ferroptosis. This review synthesizes the findings of these studies, highlighting the specific miRNAs that act as either inhibitors or inducers of ferroptosis in different disease contexts, including various cancers (e.g., lung, breast, colorectal) and degenerative conditions (e.g., acute renal failure, diabetic retinopathy). We discuss the molecular mechanisms by which these miRNAs regulate ferroptosis, often by targeting key genes involved in iron metabolism, lipid peroxidation, and antioxidant defense. Furthermore, we explore the potential of these miRNAs to serve as diagnostic biomarkers and therapeutic targets in ferroptosis-related disorders, offering insights into novel strategies for disease management.

The study, synthesis, and application of nanomaterials in medicine have grown exponentially in recent years. An example of this is the understanding of how nanomaterials activate or regulate the immune system, particularly macrophages. In this work, nanoparticles were synthesized using Rumex hymenosepalus as a reducing agent (AgRhNPs). According to thermogravimetric analysis, the metal content of nanoparticles is 55.5% by weight. The size of the particles ranges from 5–26 nm, with an average of 11 nm, and they possess an fcc crystalline structure. The presence of extract molecules on the nanomaterial was confirmed by UV-Vis and FTIR. It was found by UPLC-qTOF that the most abundant compounds in Rh extract are flavonols, flavones, isoflavones, chalcones, and anthocyanidins. The viability and apoptosis of the THP-1 cell line were evaluated for AgRhNPs, commercial nanoparticles (AgCNPs), and Rh extract. The results indicate a minimal cytotoxic and apoptotic effect at a concentration of 12.5 μg/mL for both nanoparticles and 25 μg/mL for Rh extract. The interaction of the THP-1 cell line and treatments was used to evaluate the polarization of monocyte subsets in conjunction with an evaluation of CCR2, Tie-2, and Arg-1 expression. The AgRhNPs nanoparticles and Rh extract neither exhibited cytotoxicity in the THP-1 monocyte cell line. Additionally, the treatments mentioned above exhibited anti-inflammatory effects by maintaining the classical monocyte phenotype CD14++CD16, reducing pro-inflammatory interleukin IL-6 production, and increasing IL-4 production.

Aims: Erythrocruorin for a potential application as a Red Blood Cells Substitute. Background: Nanostructured materials, such as liposomes and polymeric materials have offered new alternatives that allow the design and manufacture of systems as potential substitutes for red blood cells. Objective: Functionalized liposomes Fabrication and Characterization. Methods: The liposomes manufactured with egg yolk lecithin prepared by the extrusion method were functionalized with EfEc and stabilized with polyethylene glycol (PEG) by an absorption method. Results: The nanoplatform has a hydrodynamic diameter of 452.4 ± 24.56 nm; this size provides the ability to avoid problems such as system extravasation, also presents stability (ζ-potential = -30. 06 ± 0.42 mV) and SEM micrographs show a semi-spherical morphology. Also, EfEc showed a peak of fluorescence emission at 449 nm, which allowed us to observe the protein's presence on the surface of the liposomes employing CLSM. Conclusion: In this work, we report the fabrication and characterization of liposomes with EfEc and PEG on their surface. The nanoplatform exhibits physical-chemical characteristics that confer a potential application as a substitute for red blood cells. Other: Microstructural analysis