No abstract

Neospora caninum is a coccidian intracellular protozoan capable of infecting a wide range of mammals, although severe disease is mostly reported in dogs and cattle. Innate defences triggered by monocytes/macrophages are key in the pathogenesis of neosporosis, as these cells are first-line defenders against intracellular infections. The aim of this study was to characterize infection and innate responses in macrophages infected with N. caninum using a well-known cell model to study macrophage functions (human monocyte THP-1 cells). Intracellular invasion of live tachyzoites occurred as fast as 4 h (confirmed with immunofluorescence microscopy using N. caninum-specific antibodies). Macrophages infected by N. caninum had increased expression of pro-inflammatory cytokines (TNFα, IL-1β, IL-8, IFNγ). Interestingly, N. caninum induced expression of host-defence peptides (cathelicidins), a mechanism of defence never reported for N. caninum infection in macrophages. The expression of cytokines and cathelicidins in macrophages invaded by N. caninum was mediated by mitogen-activated protein kinase (MEK 1/2). Secretion of such innate factors from N. caninum-infected macrophages reduced parasite internalization and promoted the secretion of pro-inflammatory cytokines in naïve macrophages. We concluded that rapid invasion of macrophages by N. caninum triggered protective innate defence mechanisms against intracellular pathogens.

AimTo raise awareness of the existence of extrarenal renal cell carcinoma (RCC).Methods and resultsWe report three patients with extrarenal RCC found in the renal proximity, but unattached to the kidney. None had a history of RCC or an identifiable primary renal neoplasm at the time of the diagnosis and on follow‐up. The patients included two males and one female aged 57, 77, and 63 years, respectively. One carcinoma was found in the perirenal tissue adjacent to the adrenal, one involved the adrenal gland, and one was a retroperitoneal mass found within the lymph nodes. Two extrarenal RCCs represented clear‐cell RCCs and one was an unclassifiable RCC. No patient had evidence of metastases at presentation and disease progression during the follow‐up. This report adds to the literature on this unusual clinical scenario and further supports the concept of extrarenal RCC, which is not a well‐recognized clinical phenomenon. We also reviewed other similar reports documenting the absence of identifiable renal primaries in the setting of either disseminated metastatic disease or isolated distant metastases of presumed renal origin. Similarly, some carcinomas of apparent renal derivation have been also identified during a work‐up of metastatic carcinomas of unknown primary.ConclusionsThere should be an awareness of this unusual and intriguing clinical scenario that currently lacks a definitive explanation and standardized therapy strategies. Establishing a correct diagnosis may allow treatment with specific targeted therapies in selected clinical cases.

Survivors of childhood cancer (SCCs) are at increased risk of late effects, which are cancer- and treatment-related side-effects that are experienced months to years post-treatment and encapsulate a range of physical, cognitive and emotional problems including secondary malignancies. Perceived health can serve as an indicator of overall health. This study aims to (1) understand how a patient reported outcome (PRO) of perceived health of SCCs compares to controls who have not had a cancer diagnosis and (2) examine the relationships between perceived health and demographic and clinical variables, and health behavior. A total of 209 SCCs (n = 113 (54.10%) males; median age at diagnosis = 6.50 years; median time off treatment = 11.10 years; mean age at study = 19.00 years) were included. SCCs completed annual assessments as part of Long-Term Survivor Clinic appointments, including a question on perceived health answered on a five-point Likert scale. Data were collected retrospectively from medical charts. Perceived health of SCCs was compared to a control group (n = 836) using data from the 2014 Canadian Community Health Survey. Most SCCs (67%) reported excellent or very good health. The mean perceived health of SCCs (2.15 ± 0.91) was not statistically different from population controls (2.10 ± 0.87). Pain (B = 0.35; p < 0.001), physical activity (B = −0.39; p = 0.013) and concerns related to health resources (B = 0.59; p = 0.002) were significant predictors of perceived health. Factors shown to influence SCCs’ perceived health may inform interventions. Exploration into how SCCs develop their conception of health may be warranted.