Chlorpyrifos induces lung metastases and modulation of cancer stem cell markers in triple negative breast cancer model.

Breast cancer is a major public health problem, and distant metastases are the main cause of morbidity and mortality. Chlorpyrifos is an organophosphate that promotes Epithelial-Mesenchymal Transition-like phenotype in breast cancer cell lines and modulates the Breast Cancer Stem Cells activating two key processes related to the metastatic cascade. Here, we investigated whether Chlorpyrifos may induce distant metastases in an in vivo triple negative tumor model.

Triple negative breast cancer cells exposed to aryl hydrocarbon receptor ligands hexachlorobenzene and chlorpyrifos activate endothelial cells.

Breast cancer is currently one of the most prevalent cancers worldwide. The mechanisms by which pesticides can increase breast cancer risk are multiple and complex. We have previously observed that two aryl hydrocarbon receptor (AhR) agonists ‒pesticides hexachlorobenzene (HCB) and chlorpyrifos (CPF)‒ act on tumor progression, stimulating cell migration and invasion in vitro and tumor growth in animal models.

Effects of a Multicomponent Lipid Emulsion on Brain Volumes in Extremely Low Birth Weight Infants.

Objective: During the early weeks of life optimization of nutrition in extremely preterm infants presents a critical opportunity to attenuate the adverse neurological consequences of prematurity and potentially improve neurodevelopmental outcome. We hypothesized that the use of multicomponent lipid emulsion (MLE) in parenteral nutrition (PN) would be related to larger volume of the cerebellum on brain magnetic resonance at term of equivalent age (TEA) in extremely low birth weight (ELBW) infants.

Study Design: We analyzed the brain magnetic resonance imaging (MRI) at TEA of a cohort of preterm infants with gestational age ≤28 weeks and/or birth weight <1,000 g randomly assigned in our previous trial to receive an MLE or soybean-based lipid emulsion (SLE).

Neurodevelopmental Outcomes in Preterm Infants Receiving a Multicomponent vs. a Soybean-Based Lipid Emulsion: 24 Month Follow-Up of a Randomized Controlled Trial.

Background: Few studies in the literature have analyzed the long-term neurodevelopmental outcomes of the administration of a multicomponent versus a soybean-based lipid emulsion (LE) in preterm infants receiving parenteral nutrition (PN). A recent randomized controlled trial conducted in our unit provided evidence of better growth in head circumference during the hospital stay in those who received a multicomponent LE.

Methods: This is a 24 month follow-up study of preterm infants, previously enrolled in a randomized trial, who received a multicomponent LE (SMOFlipid) or a standard soybean-based one (Intralipid).

Acellular fish skin grafts for the management of wounds in dogs and cats: 17 cases (2019-2021).

Objective: To report the clinical outcomes of the use of acellular fish skin grafts (FSGs) for the management of complex soft tissue wounds of various etiologies in dogs and cats.

Animals: 13 dogs and 4 cats with complex wounds treated with FSGs between February 2019 and March 2021.

Procedures: Medical records were reviewed for information regarding cause, location, size of the wound, management techniques, complications, and clinical outcomes.

Endocrine disruptor chlorpyrifos promotes migration, invasion, and stemness phenotype in 3D cultures of breast cancer cells and induces a wide range of pathways involved in cancer progression.

Organophosphorus chlorpyrifos (CPF) is currently considered an endocrine disruptor (ED), as it can imitate hormone actions both in vitro and in vivo. We recently reported that CPF induces migration and invasion in 2D cultures and changes the expression of key molecular markers involved in epithelial mesenchymal transition in MCF-7 and MDA-MB-231 cell lines. In this study, we investigated whether CPF could behave as a predisposing factor for tumors to become more metastatic and aggressive using 3D culture models.

Efficacy of Unsupervised Self-Collected Mid-Turbinate FLOQSwabs for the Diagnosis of Coronavirus Disease 2019 (COVID-19).

The Global Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) pandemic has resulted in explosive patterns of transmission in most countries. Nasopharyngeal swabs were the specimen's collection tools recommended for the diagnosis of SARS-CoV-2 infection, and for monitoring infection outbreaks in communities. Our objective was to report the quality and efficacy of unsupervised self-collected mid turbinate "dry FLOQSwabs" (MT FLOQSwabs) (56380CS01, Copan).

Chronic exposure to low concentrations of chlorpyrifos affects normal cyclicity and histology of the uterus in female rats.

Chlorpyrifos (CPF), the most used insecticide in Argentina, can act as an endocrine disruptor at low doses. We previously demonstrated that chronic exposure to CPF induces hormonal imbalance in vivo. The aim of this work was to study the effects of low concentrations of CPF (0.

Evaluation of staple line reinforcement after partial gastrectomy closure in an ex vivo canine model.

Objective: To determine the influence of stapling on leakage pressures after canine partial gastrectomy.

Study Design: Ex vivo study.

Sample Population: Gastric specimens from 24 adult canine cadavers.

Growth of Head Circumference and Body Length in Preterm Infants Receiving a Multicomponent vs a Soybean-Based Lipid Emulsion: A Randomized Controlled Trial.

Background: The growth of very low-birth-weight (VLBW) infants relies, to a large extent, on parenteral nutrition (PN) during the early weeks of life. Despite the parenteral nutrients supply, extrauterine growth restriction remains the main concern for these infants. A parenteral multicomponent lipid emulsion (MLE) might improve growth and neurological outcomes, delivering fats for brain growth that the traditional soybean-based lipid emulsion (SLE) fails to provide.

Effect of Different Milk Diet on the Level of Fecal Calprotectin in Very Preterm Infants.

To evaluate the course of fecal calprotectin (FC) in very preterm infants over the first 15 days of life in relation to the type of milk diet. This study was part of a randomized controlled trial comparing two different ways of integrating the own mother's milk (OMM) for the evaluation of feeding tolerance in very preterm infants. In infants with gestational age of ≤ 32 weeks randomized to receive preterm formula (PF group) or pasteurized donor human milk (PDHM group) as a supplement to the OMM insufficient or unavailable, FC level was planned to be measured at the first meconium passage and at days 8 and 15 of life (T0, T1, and T2, respectively).

Chlorpyrifos subthreshold exposure induces epithelial-mesenchymal transition in breast cancer cells.

Chlorpyrifos (CPF) is one of the most frequently used pesticide in extensive agriculture around the world and can be incorporated by humans and animals with possible consequences on health. The effects of this pesticide on carcinogenesis are not clear and there is no consensus concerning the risks of this compound. In previous work, we demonstrated that CPF induces proliferation of breast cancer cells both in vivo and in vitro.

The feasibility and utility of optical coherence tomography directed histopathology for surgical margin assessment of canine mast cell tumours.

Histopathologic surgical margin assessment in veterinary patients is an imprecise science with assessment limited to a small proportion of the surgical margin due to time and finances. Incomplete excision of canine mast cell tumours (MCTs) alters treatment recommendations and prognosis. Optical coherence tomography (OCT) is a novel imaging modality that has been reported in a single veterinary study for surgical margin assessment.

Clinical features and outcome of functional thyroid tumours in 70 dogs.

Objective: To describe the clinical features and outcome of functional thyroid tumours in dogs.

Materials And Methods: Retrospective multi-institutional study of 70 dogs diagnosed with thyroid mass and concurrent hyperthyroidism. Clinical data regarding presentation, treatment, outcome and functional thyroid status were retrieved.

Optical coherence tomography imaging of excised canine apocrine gland anal sac adenocarcinoma tumours.

Optical coherence tomography (OCT) is an optical imaging modality that has been investigated for real-time surgical margin evaluation in human breast cancer patients. Previous veterinary OCT studies have been limited to surgical margin imaging for soft tissue sarcoma (STS) tumours. To the authors knowledge, OCT has never been used to characterize or evaluate other types of neoplasia in dogs.

Angiogenesis signaling in breast cancer models is induced by hexachlorobenzene and chlorpyrifos, pesticide ligands of the aryl hydrocarbon receptor.

Breast cancer incidence is increasing globally and pesticides exposure may impact risk of developing this disease. Hexachlorobenzene (HCB) and chlorpyrifos (CPF) act as endocrine disruptors, inducing proliferation in breast cancer cells. Vascular endothelial growth factor-A (VEGF-A), cyclooxygenase-2 (COX-2) and nitric oxide (NO) are associated with angiogenesis.

Differential expression of the long and truncated Hv1 isoforms in breast-cancer cells.

Metabolic reprogramming of cancer cells results in a high production of acidic substances that must be extruded to maintain tumor-cell viability. The voltage-gated proton channel (Hv1) mediates highly selective effluxes of hydronium-ion (H ) that prevent deleterious cytoplasmic acidification. In the work described here, we demonstrated for the first time that the amino-terminal-truncated isoform of Hv1 is more highly expressed in tumorigenic breast-cancer-cell lines than in nontumorigenic breast cells.

Influence of Interlocking Horizontal Mattress Epitendinous Suture Placement on Tendinous Biomechanical Properties in a Canine Common Calcaneal Laceration Model.

Objective:  This article evaluates the effect of an interlocking horizontal mattress epitendinous suture (IHMES) in addition to a three-loop pulley (3LP) core suture for canine tendon repair.

Study Design:  Twenty-eight cadaveric common calcaneal tendons were randomized, sharply transected and repaired with either a 3LP or 3LP + IHMES. Tensile loads required to create a 1- and 3-mm gap, yield, peak and failure loads, and mode of failure were analysed.

AhR ligands reactivate LINE-1 retrotransposon in triple-negative breast cancer cells MDA-MB-231 and non-tumorigenic mammary epithelial cells NMuMG.

Breast cancer is the most common cancer type in females worldwide. Environmental exposure to pesticides affecting hormonal homeostasis does not necessarily induce DNA mutations but may influence gene expression by disturbances in epigenetic regulation. Expression of long interspersed nuclear element-1 (LINE-1) has been associated with tumorigenesis in several cancers.

Effect of bite distance of an epitendinous suture from the repair site on the tensile strength of canine tendon constructs.

Objective: To evaluate effects of bite distance of an interlocking horizontal mattress epitendinous suture (IHMES) from the repair site on tensile strength of canine tendon repairs.

Sample: 72 canine cadaveric superficial digital flexor tendons (SDFTs).

Procedures: Transverse tenotomy was performed, and SDFTs were repaired with a locking-loop construct (LL construct) or 3 LL constructs with IHMES suture bites placed 5 (LL + 5ES construct), 10 (LL + 10ES construct), or 15 (LL + 15ES construct) mm from the transection site (18 SDFTs/group).

Segmental mandibulectomy as a novel adjunct management strategy for the treatment of an advanced cholesteatoma in a dog.

A 6-year-old spayed female Labrador retriever dog was evaluated for trismus and peripheral vestibular syndrome. Computed tomography (CT) revealed a mass arising from the tympanic bulla consistent with a cholesteatoma. A total ear canal ablation, bulla osteotomy, and adjunct segmental mandibulectomy were performed.

Delivery room interventions to improve the stabilization of extremely-low-birth-weight infants.

Objective: To retrospectively verify whether the positioning of the umbilical venous catheter (UVC) in the delivery room (DR) and the early start of the preheated infusion of 10% glucose solution conditioned temperature and glycemia values of ELBW neonates in the first hours of life.

Methods: Neonates ( = 137) were divided into two groups on the basis of timing of positioning of the UVC. In Group I the UVC was placed in DR, while in Group II after Neonatal Intensive Care Unit (NICU) admission.

Comparison between optical coherence tomographic and histopathologic appearances of artifacts caused by common surgical conditions and instrumentation.

Objective: To document the appearance of artifacts created by commonly encountered surgical conditions and instrumentation on optical coherence tomography (OCT) and to compare these findings with histopathology.

Study Design: Ex vivo study.

Animals: Five canine cadavers.

Biomechanical comparison of three epitendinous suture patterns as adjuncts to a core locking loop suture for repair of canine flexor tendon injuries.

Objective: To determine the effects of different epitendinous sutures (ES) in addition to core locking-loop (LL) sutures on the mechanical properties and gap formation in a canine cadaveric tendon model.

Study Design: Experimental, ex vivo, biomechanical study.

Sample Population: Seventy-two cadaveric superficial digital flexor tendon specimens.