University of California, Berkeley , 111 Koshland Hall , Berkeley , California 94720 , United States.
Published: December 2019
AI Article Synopsis
Article Abstract
Microbes interact with the world around them at the chemical level. However, directly examining the chemical exchange between microbes and microbes and their environment, at ecological scales, i.e., the scale of a single bacterial cell or small groups of cells, remains a key challenge. Here we address this obstacle by presenting a methodology that enables matrix-assisted laser desorption/ionization (MALDI) imaging mass spectrometry (IMS) of bacterial microcolonies. By combining optimized sample preparation with subatmospheric pressure MALDI, we demonstrate that chemical output from groups of as few as ∼50 cells can be visualized with MALDI-IMS. Application of this methodology to and revealed heterogeneity in chemical output across microcolonies and asymmetrical metabolite production when cells grew within physiological gradients produced by roots. Taken together, these results indicate that MALDI-IMS can readily visualize metabolites made by very small assemblages of bacterial cells and that even these small groups of cells can differentially produce metabolites in response to local chemical gradients.
Background: Single-slice computed tomography (CT) body composition has been studied extensively for prognostication in patients with cancer. New software packages can also provide multi-slice volumetric measurements, but the clinical utility of these remains under explored. This study aimed to evaluate the agreement between single- and multi-slice body composition analyses in patients with oesophagogastric cancer and to explore the association between these measures and overall survival.
Introduction: The roots and rhizomes of Curcuma longa L. serve as distinct traditional Chinese medicines with varying therapeutic effects, likely attributed to differences in the accumulation and distribution of metabolites in these parts.
Objective: The study aims to investigate the differences and spatial distribution patterns of metabolites in C.
Through a comprehensive retrospective analysis of a 52-year-old woman with primary ovarian lymphoma (POL) and a review of similar cases over the past decade in the PubMed database, we gained several key insights into improving the understanding of POL among clinicians and radiologists for accurate diagnosis. POL is more prevalent among women in their 40s and usually presents with clinical manifestations of a solid mass (typically over 10 cm) and abdominal pain with B symptoms. Four imaging features show promise as indicators of potential diagnostic value in POL: the ovarian retention sign, touching ovaries, vascular floatation, and the sandwich sign.
Background And Objective: Uterine teratomas are extremely rare in postmenopausal women and pose significant challenges in diagnosis and treatment. This study reports a case of a 54-year-old postmenopausal woman diagnosed with a uterine teratoma during a routine gynecological ultrasound. The study aims to explore the diagnosis and treatment of uterine teratomas in postmenopausal women through detailed imaging assessment and hysteroscopy surgery, aiming to enhance the understanding of this rare uterine tumor and improve patient treatment outcomes and quality of life.
Hodgkin's lymphoma (HL) is a malignancy of the lymphocytes in the lymph nodes and presents with non-specific systemic symptoms like fever, night sweats, and weight loss. While HL often involves the mediastinum, it rarely causes superior vena cava (SVC) syndrome, and eosinophilia is noted in approximately 15% of cases. Here, we report a unique presentation of HL in a 52-year-old male with a history of chronic pruritus, chronic kidney disease, and inactive hepatitis B.
