Targeted nanoliposomes to improve enzyme replacement therapy of Fabry disease.

The central nervous system represents a major target tissue for therapeutic approach of numerous lysosomal storage disorders. Fabry disease arises from the lack or dysfunction of the lysosomal alpha-galactosidase A (GLA) enzyme, resulting in substrate accumulation and multisystemic clinical manifestations. Current enzyme replacement therapies (ERTs) face limited effectiveness due to poor enzyme biodistribution in target tissues and inability to reach the brain.

Interlaboratory comparison of endotoxin contamination assessment of nanomaterials.

Endotoxin contamination is a significant hurdle to the translation of nanomaterials for biomedical applications. Multiple reports now describe that more than one-third of nanomaterials fail early pre-clinical assessment due to levels of endotoxin above regulatory requirements. Additionally, most immunological studies or studies testing nanomaterials in the literature lack inclusion of this assessment, which may lead to false-positive or false-negative results if high levels of the contaminant are present.

Synthesis, Physicochemical Characterization, and Antimicrobial Evaluation of Halogen-Substituted Non-Metal Pyridine Schiff Bases.

Four synthetic Schiff bases (PSB1 [(E)-2-(((4-aminopyridin-3-yl)imino)methyl)-4,6-dibromophenol], PSB2 [(E)-2-(((4-aminopyridin-3-yl)imino)methyl)-4,6-diiodophenol], PSB3 [(E)-2-(((4-aminopyridin-3-yl)imino)methyl)-4-iodophenol], and PSB4 [(E)-2-(((4-aminopyridin-3-yl)imino)methyl)-4-chloro-6-iodophenol]) were fully characterized. These compounds exhibit an intramolecular hydrogen bond between the hydroxyl group of the phenolic ring and the nitrogen of the azomethine group, contributing to their stability. Their antimicrobial activity was evaluated against various Gram-negative and Gram-positive bacteria, and it was found that the synthetic pyridine Schiff bases, as well as their precursors, showed no discernible antimicrobial effect on Gram-negative bacteria, including Typhi (and mutant derivatives), Typhimurium, , and .

Emergency preparedness and response sensitive of migrant populations in Chile: post-pandemic perspectives.

On August 31, 2023, the Chilean government ended the health alert for COVID-19. This milestone invites us to reflect on lessons learned in emergency preparedness and response regarding migrant populations in the country. In this context, three perspectives are presented.

Tuning plasmid DNA amounts for cost-effective transfections of mammalian cells: when less is more.

Transient gene expression (TGE) in mammalian cells is a well-known approach to the fast expression of recombinant proteins. The human cell line HEK (human embryonic kidney) 293F is widely used in this field, due to its adaptability to grow in suspension to high cell densities in serum-free media, amenability to transfection, and production of recombinant proteins in satisfactory quantities for functional and structural analysis. Amounts of plasmid DNA (pDNA) required in transfections for TGE remain high (usually 1 µg pDNA/mL, or even higher), representing a noticeable proportion of the overall cost.

Feeding Behavior Modifies the Circadian Variation in RR and QT intervals by Distinct Mechanisms in Mice.

Rhythmic feeding behavior is critical for regulating the phase and amplitude in the ≍24-hour variation of the heart rate (RR intervals), ventricular repolarization (QT intervals), and core body temperature in mice. We hypothesized the changes in cardiac electrophysiology associated with feeding behavior were secondary to changes in core body temperature. Telemetry was used to record electrocardiograms and core body temperature in mice during ad libitum-fed conditions and after inverting normal feeding behavior by restricting food access to the light cycle.

Scapholunate and lunotriquetral joint dynamic stabilizers and their role in wrist neuromuscular control and proprioception.

Background: Recent research interest has grown in exploring the role of muscles, isometric contraction, proprioception, and neuromuscular control in addressing dynamic scapholunate and lunotriquetral joint instability, marking a shift in the understanding of wrist stability.

Purpose: To present a comprehensive review of the carpal ligaments anatomy and wrist biomechanics, with a particular focus on the role of proprioception in dynamic carpal stability and their role in managing scapholunate (SL) and lunotriquetral (LTq) dynamic instabilities.

Study Design: We conducted a systematic search of the literature and review of the most relevant papers published and indexed in pubmed, related to wrist biomechanics, proprioception and its contribution to carpal dynamic stability.

Access to health services for international migrants during the COVID-19 pandemic: a qualitative study.

Objective: To explore the experience and perception of international migrants in Chile regarding access to health services during the pandemic.

Method: Collective case study following the qualitative paradigm. Forty semi-structured interviews were carried out with 30 migrants from different countries in Latin America and the Caribbean and 10 key actors from the health or social sector in November and December 2020.

Blue prescription: A pilot study of health benefits for oncological patients of a short program of activities involving the sea.

Performing outdoor activities in blue spaces can help improve human health and mental well-being by reducing stress and promoting social relationships. The number of people surviving cancer has increased globally to experience this disease as a life-changing and chronic condition with physical and psychosocial symptoms that have negative impacts on their quality of life. While there has been a growth of programs in green spaces to meet the needs of cancer patients, such as follow-up post-treatment care, support groups and physical activity programs, very few studies have examined the effects of activities involving the sea for the health and well-being of oncology patients.

Kienböck's disease: preventing disease progression in early-stage disease.

Currently Kienböck's disease remains an 'unsolved' problem in hand surgery. Different factors have been associated with the avascular necrosis of the lunate. Mechanical, vascular and biological factors, alone or in combination, may have an influence in the aetiopathogenesis and determine the progress of the disease and even the results of the treatment.

as a New Platform for the Fast Production of Vault-like Nanoparticles: An Optimized Protocol.

Vaults are protein nanoparticles that are found in almost all eukaryotic cells but are absent in prokaryotic ones. Due to their properties (nanometric size, biodegradability, biocompatibility, and lack of immunogenicity), vaults show enormous potential as a bio-inspired, self-assembled drug-delivery system (DDS). Vault architecture is directed by self-assembly of the "major vault protein" (MVP), the main component of this nanoparticle.

Intramolecular Hydrogen Bond in Pyridine Schiff Bases as Ancillary Ligands of Re(I) Complexes Is a Switcher between Visible and NIR Emissions: A Relativistic Quantum Chemistry Study.

Rhenium(I) tricarbonyl complexes have been described as suitable fluorophores, particularly for biological applications. -[Re(CO)(N,N)L] complexes, where N,N is a substituted dinitrogenated ligand (bipyridine or derivatives with relatively small substituents) and L the ancillary ligand [a pyridine Schiff base (PSB) harboring an intramolecular hydrogen bond (IHB)], have presented promissory results concerning their use as fluorophores, especially for walled cells (i.e.

Latin American Youths' Migration Journeys and Settlement in the Tarapacá Region in Chile: Implications for Sexual and Reproductive Health.

The sexual and reproductive health of young migrants has not been sufficiently addressed in mobility studies. In this article, we dwell on some aspects of this issue in the migration process of Latin American youth. We conducted a qualitative study in the region of Tarapacá, Chile, carrying out in-depth interviews with key informants, health staff and young migrants between 18 and 25 years old.

[Towards ethical care in nursing homes during the COVID-19 pandemic: a qualitative study with international migrants in Chile].

International migrants have been recognized as a population at risk in the context of the COVID-19 pandemic. Worldwide, various strategies have been deployed for the protection of this population, such as the establishment of reception and quarantine or isolation centers. This article reports the results of a study that explored the experiences of international migrants in nursing homes in Chile created to ensure a safe quarantine during the COVID-19 pandemic, from an approach of ethical conditions for care.

Is peritoneal dialysis suitable technique CKD patients over 65 years? A prospective multicenter study.

Background: Chronic kidney disease (CKD) is increasing in patients older than 65 years and is related to morbidity, frailty, and dependence. Peritoneal dialysis (PD) has classically been associated with young patients with an active life.

Hypothesis: PD should be offered to patients over 65 years.

Liposomal formulations for treating lysosomal storage disorders.

Lysosomal storage disorders (LSD) are a group of rare life-threatening diseases caused by a lysosomal dysfunction, usually due to the lack of a single enzyme required for the metabolism of macromolecules, which leads to a lysosomal accumulation of specific substrates, resulting in severe disease manifestations and early death. There is currently no definitive cure for LSD, and despite the approval of certain therapies, their effectiveness is limited. Therefore, an appropriate nanocarrier could help improve the efficacy of some of these therapies.

The Conserved CNOT1 Interaction Motif of Tristetraprolin Regulates ARE-mRNA Decay Independently of the p38 MAPK-MK2 Kinase Pathway.

The regulation of the mRNA decay activator Tristetraprolin (TTP) by the p38 mitogen-activated protein kinase (MAPK) pathway during the mammalian inflammatory response represents a paradigm for the control of mRNA turnover by signaling. TTP activity is regulated through multiple phosphorylation sites, including an evolutionary conserved serine in its CNOT1 Interacting Motif (CIM) whose phosphorylation disrupts an interaction with CNOT1 of the CCR4-NOT deadenylase complex. Here we present evidence that the TTP CIM recruits the CCR4-NOT deadenylase complex and activates mRNA degradation cooperatively with the conserved tryptophan residues of TTP, previously identified to interact with CNOT9.

Correction: The role of substituted pyridine Schiff bases as ancillary ligands in the optical properties of a new series of -rhenium(i) tricarbonyl complexes: a theoretical view.

[This corrects the article DOI: 10.1039/D1RA05737E.].

The role of substituted pyridine Schiff bases as ancillary ligands in the optical properties of a new series of -rhenium(i) tricarbonyl complexes: a theoretical view.

Over the last few years, luminescent Re(i) tricarbonyl complexes have been increasingly proposed as fluorophores suitable for fluorescence microscopy to visualize biological structures and cells. In this sense, incorporating an asymmetrical pyridine Schiff base (PSB) as the ancillary ligand strongly modifies the staining and luminescent properties of Re(i) tricarbonyl complexes. In this work, we analyzed two series of Re(i) tricarbonyl complexes with their respective PSB ligands: (1) -[Re(CO)(2,2'-bpy)(PSB)] and (2) -[Re(CO)(4,4'-bis(ethoxycarbonyl)-2,2'-bpy)(PSB)], where the PSB exhibits substitutions at positions 4 or 6 in the phenolic ring with methyl or halogen substituents.

Advantages of Sentinel Lymph Node Mapping by Single Photon Emission Computed Tomography/Computed Tomography in Early-Stage Malignant Head-and-Neck Skin Tumors.

Background: The aim of this study was to determine the advantages of preoperative sentinel lymph node mapping (SLNM) by single photon emission computed tomography/computed tomography (SPECT / CT) in patients with early-stage cutaneous head-and-neck malignancies.

Materials And Methods: We conduct a 7-year and 6 months retrospective, cross-sectional study. Patients with early-stage malignant head-and-neck skin tumors and cutaneous adnexa who underwent SLNM by SPECT/CT from March 2012 and December 2019, were included in the study.

Profile of Patients with Diabetes Treated with Insulin Lispro 200 U/ml: A Real-World Study from Spain.

Introduction: Insulin lispro 200 U/ml (IL200) is a rapid-acting concentrated insulin used for the treatment of adults with diabetes requiring daily doses of > 20 units of rapid-acting insulin. The aim of this study was to describe the clinical/demographic and treatment characteristics of patients who initiated insulin IL200 therapy in Spain in a real-world setting (PROFILE-IL200).

Methods: This retrospective observational study based on the IQVIA database included adult (≥ 18 years) patients with type 1 (T1D) or type 2 (T2D) diabetes who initiated IL200 between June 2015 and December 2019.

Physicochemical and Theoretical Characterization of a New Small Non-Metal Schiff Base with a Differential Antimicrobial Effect against Gram-Positive Bacteria.

Searching for adequate and effective compounds displaying antimicrobial activities, especially against Gram-positive bacteria, is an important research area due to the high hospitalization and mortality rates of these bacterial infections in both the human and veterinary fields. In this work, we explored ()-4-amino-3-((3,5-di--butyl-2-hydroxybenzylidene)amino) benzoic acid (SB-1, harboring an intramolecular hydrogen bond) and ()-2-((4-nitrobenzilidene)amino)aniline (SB-2), two Schiff bases derivatives. Results demonstrated that SB-1 showed an antibacterial activity determined by the minimal inhibitory concentration (MIC) against , , and (Gram-positive bacteria involved in human and animal diseases such as skin infections, pneumonia, diarrheal syndrome, and urinary tract infections, among others), which was similar to that shown by the classical antibiotic chloramphenicol.

All-in-one biofabrication and loading of recombinant vaults in human cells.

One of the most promising approaches in the drug delivery field is the use of naturally occurring self-assembling protein nanoparticles, such as virus-like particles, bacterial microcompartments or vault ribonucleoprotein particles as drug delivery systems (DDSs). Among them, eukaryotic vaults show a promising future due to their structural features,stability and non-immunogenicity. Recombinant vaults are routinely produced in insect cells and purified through several ultracentrifugations, both tedious and time-consuming processes.