Prognostic nutritional index as a predictor of mortality in nontuberculous mycobacterial lung disease.

Background: Although the association between nontuberculous mycobacterial lung disease (NTM-LD) and malnutrition is known, there are a few reports on the association between the nutritional score and death in patients with NTM-LD. This study investigated the association between the nutrition data at the time of NTM-LD diagnosis and death.

Methods: A retrospective study was conducted for patients with NTM-LD who visited the Maebashi Red Cross Hospital from January 2014 to December 2018.

Possible Serological Markers to Predict Mortality in Acute Exacerbation of Idiopathic Pulmonary Fibrosis.

Idiopathic pulmonary fibrosis (IPF) has a particularly poor prognosis, and most IPF-related deaths are due to acute exacerbation (AE) of this condition. Few reports about biomarkers to predict prognosis of AE-IPF have been published since the release of the new AE-IPF criteria in 2016. The present study investigated relationships between serological markers and in-hospital mortality after the onset of AE-IPF.

Mechanisms of oxidative stress-induced mutagenicity by potassium bromate and nitrofurantoin.

Oxidative stress is well known as a key factor of chemical carcinogenesis. However, the actual role of oxidative stress in carcinogenesis, such as oxidative stress-related mutagenicity, remains unclear. It has been reported that 8-hydroxydeoxyguanosine (8-OHdG), an oxidized DNA lesion, might contribute to chemical carcinogenesis.

Role of oxidative stress in the chemical structure-related genotoxicity of nitrofurantoin in -deficient delta mice.

Despite its antimicrobial activity, nitrofurantoin (NFT) is a renal carcinogen in rats. Oxidative stress induced by reduction of the nitro group of NFT may contribute to its genotoxicity. This is supported by our recent results indicating that the structure of the nitrofuran plays a key role in NFT-induced genotoxicity, and oxidative DNA damage is involved in renal carcinogenesis.

In vivo reporter gene mutation and micronucleus assays in gpt delta mice treated with a flame retardant decabromodiphenyl ether.

Polybrominated diphenyl ethers (PBDEs), a class of brominated flame retardants, have been widely used as additive flame retardants. Recently, the use of brominated flame retardants has been restricted or prohibited under various legislative acts because of the persistence, bioaccumulation potential, and toxicity of these compounds. However, there are also additional concerns regarding environmental contamination and human exposure to PBDEs resulting from informal recycling technology.

Effects of Nrf2 silencing on oxidative stress-associated intestinal carcinogenesis in mice.

To assess the risk of colorectal cancer in humans with inactivation of NRF2, Nrf2-proficient (Nrf2(+/+) ) and -deficient (Nrf2(-/-) ) mice were exposed to potassium bromate (KBrO3 ) at concentrations of 750 or 1500 ppm for 52 weeks. Neoplastic proliferative lesions were observed in the small intestine and exhibited accumulations of β-catenin and cyclin D1. The lesions had characteristics similar to those in experimental models of human hereditary colorectal cancer.

A medium-term gpt delta rat model as an in vivo system for analysis of renal carcinogenesis and the underlying mode of action.

The kidney is a major target site of chemical carcinogenesis. However, a reliable in vivo assay for rapid identification of renal carcinogens has not been established. The purpose of this study was to develop a new medium-term gpt delta rat model (the GNP model) to facilitate identification of renal carcinogens.

Spontaneous nephroblastoma with lung metastasis in a rat.

This report describes a spontaneous nephroblastoma with lung metastasis in a 10-week-old male Crl:CD(SD) rat. Macroscopically, a white mass in the kidney and two white masses in the lung were observed. Histopathologically, the renal mass was located in the cortex of a kidney, and it caused pressure on the surrounding renal parenchyma.

Disruptive cell cycle regulation involving epigenetic downregulation of Cdkn2a (p16(Ink4a)) in early-stage liver tumor-promotion facilitating liver cell regeneration in rats.

Cell cycle aberration was immunohistochemically examined in relation to preneoplastic liver cell foci expressing glutathione S-transferase placental form (GST-P) at early stages of tumor-promotion in rats with thioacetamide (TAA), a hepatocarcinogen facilitating liver cell regeneration. Immunoexpression of p16(Ink4a) following exposure to other hepatocarcinogens/promoters and its DNA methylation status were also analyzed during early and late tumor-promotion stages. GST-P(+) liver cell foci increased cell proliferation and decreased apoptosis when compared with surrounding liver cells.

Liver tumor promoting effect of etofenprox in rats and its possible mechanism of action.

To investigate the liver tumor-promoting effects of etofenprox (ETF), a pyrethroid-like insecticide, 6 week-old male F344 rats were given an intraperitoneal injection of N-diethylnitrosamine (DEN). After 2 weeks from the DEN treatment, 12 rats per group received a powdered diet containing 0, 0.25, 0.

Complex apocrine carcinoma with dominant myoepithelial proliferation in a dog.

A rare case of complex apocrine carcinoma displaying dominant myoepithelial proliferation developed in the right leg subcutis of a 10-year-old male dog. The major cell population consisted of diffusely proliferating p63-expressing neoplastic cells that were largely myoepithelial in origin co-expressing α-smooth muscle actin. A small portion of the cell population consisted of concomitant basal epithelial cells lacking α-smooth muscle actin expression.

High-grade myofibroblastic sarcoma of inguinal region in a dog.

A subcutaneous tumor in the left inguinal region was present in an 11-year-old female bloodhound. Histopathologically, the tumor showed invasive growth and extensive necroses, and it was composed of spindle-shaped, elongated, and stellate neoplastic cells accompanied by occasional giant cells arranged in fascicular, herringbone, or irregular storiform patterns with abundant production of collagen fibers. The cytoplasm of most tumor cells was positive for vimentin, alpha-smooth muscle actin, and calponin, but was negative for desmin, smoothelin, and S-100.

[A case of sarcoidosis with bilateral pleural effusion treated with high-dose steroids].

A 25-year-old man was admitted with elevated fever, dyspnea, cough, dorsal chest pain, and multiple nodular shadows and pleural effusion found on chest X-ray films. There were multiple swollen superficial lymph nodes, and non-caseating epithelioid cell granulomas with Langhans giant cells were detected on a biopsy specimen of a right inguinal lymph node. Bronchoscopy findings demonstrated mucosal irregularity, telangiectasia and small nodules, and another biopsy specimen was similar to that of the inguinal lymph node.

[A case of non-small cell lung cancer responding to S-1 over a year].

A 71-year-old woman was admitted to our hospital, because of an abnormality on her chest radiograph findings. After extensive examination, she was diagnosed with primary lung adenocarcinoma (cT4N2M1, stage IV). She was treated by carboplatin+gemcitabine, gefitinib and docetaxel and the responses were stable disease in any treatment.