ABSTRACT
Pancreatic ductal adenocarcinoma (PDAC) causes annually well over 400,000 deaths world-wide and remains one of the major unresolved health problems. This exocrine pancreatic cancer originates from the mutated epithelial cells: acinar and ductal cells. However, the epithelia-derived cancer component forms only a relatively small fraction of the tumor mass. The majority of the tumor consists of acellular fibrous stroma and diverse populations of the non-neoplastic cancer-associated cells. Importantly, the tumor microenvironment is maintained by dynamic cell-cell and cell-matrix interactions. In this article, we aim to review the most common drivers of PDAC. Then we summarize the current knowledge on PDAC microenvironment, particularly in relation to pancreatic cancer therapy. The focus is placed on the acellular stroma as well as cell populations that inhabit the matrix. We also describe the altered metabolism of PDAC and characterize cellular signaling in this cancer.
Subject(s)
Pancreatic Neoplasms/etiology , Pancreatic Neoplasms/pathology , Tumor Microenvironment , Animals , Biomarkers , Cancer-Associated Fibroblasts/metabolism , Cancer-Associated Fibroblasts/pathology , Carcinogens , Carcinoma, Pancreatic Ductal/etiology , Carcinoma, Pancreatic Ductal/metabolism , Carcinoma, Pancreatic Ductal/pathology , Disease Susceptibility , Humans , Mutation , Pancreatic Neoplasms/metabolism , Signal Transduction , Stress, Physiological , Stromal Cells/metabolism , Stromal Cells/pathology , Tumor Microenvironment/geneticsABSTRACT
The interest in pancreatic stellate cells (PSCs) has been steadily growing over the past two decades due mainly to the central role these cells have in the desmoplastic reaction associated with diseases of the pancreas, such as pancreatitis or pancreatic cancer. In recent years, the scientific community has devoted substantial efforts to understanding the signaling pathways that govern PSC activation and interactions with neoplastic cells. This mini review aims to summarize some very recent findings on signaling in PSCs and highlight their impact to the field.
ABSTRACT
According to recent reports, malnutrition may be associated with a worse prognosis in stroke patients. The aim of this study was to determine the nutritional status of stroke patients and its impact on neurological and functional status of patients in the early post-stroke period. Our prospective study included a total of 128 patients admitted to the Stroke Unit. The assessment was made in the patients within the first week after the onset of stroke symptoms. Groups of patients with abnormal body mass index (BMI <20kg/m2 or >25kg/m2) were compared to the group of normal BMI, serum albumin, total cholesterol, HDL and LDL levels were determined in each patient within 24h following admission. The analysis showed that the patients with lower levels of serum albumin and triglycerides had higher scores in the National Institutes of Health Stroke Scale (NIHSS) on admission. Patients with a higher risk of malnutrition, confirmed by the Subjective Global Assessment scale, had higher NIHSS scores. The study showed a positive relationship between the nutritional status and worse neurological status of patients in the early post-stroke period.Abbreviation: NIHSS; Rankin scale.
