Outcomes of patients with non-small cell lung cancer and poor performance status treated with immune checkpoint inhibitors in the real-world setting

International Journal of Clinical Oncology - Immune-checkpoint inhibitors (ICIs) are standard treatments for metastatic non-small cell lung cancer (NSCLC). Patients with poor performance status...     

Germline gain-of-function MMP11 variant results in an aggressive form of colorectal cancer

Matrix metalloproteinase-11 (MMP11) is an enzyme with proteolytic activity against matrix and nonmatrix proteins. Although most MMPs are secreted as inactive proenzymes and are later activated extracellularly, MMP11 is activated intracellularly by furin within the constitutive secretory pathway. It is a key factor in physiological tissue remodeling and its alteration may play an important role in the progression of epithelial malignancies and other diseases. TCGA colon and colorectal adenocarcinoma data showed that upregulation of MMP11 expression correlates with tumorigenesis and malignancy. Here, we provide evidence that a germline variant in the MMP11 gene (NM_005940: c.232C>T; p.(Pro78Ser)), identified by whole exome sequencing, can increase the tumorigenic properties of colorectal cancer (CRC) cells. P78S is located in the prodomain region, which is responsible for blocking MMP11's protease activity. This variant was detected in the proband and all the cancer-affected family members analyzed, while it was not detected in healthy relatives. In silico analyses predict that P78S could have an impact on the activation of the enzyme. Furthermore, our in vitro analyses show that the expression of P78S in HCT116 cells increases tumor cell invasion and proliferation. In summary, our results show that this variant could modify the structure of the MMP11 prodomain, producing a premature or uncontrolled activation of the enzyme that may contribute to an early CRC onset in these patients. The study of this gene in other CRC cases will provide further information about its role in CRC development, which might improve patient treatment in the future.     

Predicted versus observed FEV1 in the immediate postoperative period after pulmonary lobectomy.

OBJECTIVE: Scanty information can be found regarding ppoFEV1% correlation with true FEV1% in the immediate days after surgery, when most cardio-respiratory complications are developed. This prospective multicentric investigation aims to describe the evolution of FEV1 in a series of uneventful lobectomy cases before hospital discharge, and to identify factors associated with the variation of postoperative residual FEV1, with the ratio between the actual and the predicted postoperative FEV1 measured during the first 6 postoperative days. METHODS: One hundred and sixty-one patients submitted to lobectomy were prospectively enrolled in the study. Patients with chest wall resections and postoperative complications were excluded. Data from a total of 125 patients were thus used for the analysis. The following clinical variables were recorded: age, preoperative FEV1, ppoFEV1, presence of chronic obstructive pulmonary disease (COPD), surgical approach (VATS or muscle-sparing thoracotomy), side (right or left) and site (upper or lower) of resection, type of analgesia (epidural or intravenous), and daily visual analogue pain score (VAS). FEV1 was measured in every patient at hospital admission and daily until discharge or up to postoperative day 6. Random effects time-series cross-sectional regression analyses were performed to identify factors associated with variation of postoperative residual function (100-(preoperative FEV1-postoperative FEV1/preoperative FEV1 x 100)), and of FEV1 ratio ((actual postoperative FEV1 x 100)/ppoFEV1). For these analyses, the dependent variables (postoperative residual function and FEV1 ratio) and the pain score were analysed as panel longitudinal data. The regression analyses were subsequently validated by bootstrap procedure. RESULTS: FEV1% was lower at first postoperative day and increased gradually up to day 6 but mean values never reached ppoFEV1%. Pain scores decreased from day 1 to day 6. Preoperative FEV1 (p<0.0001) and postoperative pain score (p<0.0001) resulted independently and reliably inversely associated with postoperative residual FEV1 (model R2, 0.16). Preoperative FEV1 (p=0.001), postoperative pain score (p<0.0001), and epidural analgesia (p=0.04) resulted independently and reliably associated with postoperative FEV1 ratio (model R2, 0.13). CONCLUSION: Current methods of prediction of postoperative FEV1 greatly underestimated the real functional loss in the immediate postoperative period. Therefore, for the purpose of a more accurate risk stratification we need to correct the traditional prediction of postoperative FEV1.     

Accumulation of toxic metals (Pb and Cd) in the sea urchin Diadema aff. antillarum Philippi, 1845, in an oceanic island (Tenerife,Canary Islands)

This document shows the results obtained from a study on the concentration of toxic heavy metals in the internal tissue and exoskeleton of sea urchins, collected from their natural habitat. The levels of lead and cadmium were measured by Graphite Furnace Atomic Absorption Spectrometry. The mean concentrations of lead and cadmium in the internal tissue were 304.04 and 260.54 μg/kg respectively, whereas in the shell they were 185.02 and 142.48 μg/kg. We also performed a statistical analysis of the differences in the distribution of metals between their exoskeleton and their internal content, a correlation study of the metal content in internal tissue and shell and sampling areas, and a correlation study between the metal content and sample size. Since the sea urchin Diadema antillarum presents a wide range of variation in metal content, this study suggests that this species is an excellent bioindicator of heavy metal contamination. © 2009 Wiley Periodicals, Inc. Environ Toxicol, 2010.