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Slime : a natural history
Takes readers on a sticky scientific adventure through the three-billion-year history of slime, exploring its part in the evolution of life and its cultural and emotional significance, from its starring role in the horror genre to its subtle influence on Art Nouveau. - - Source other than the Library of Congress
Book
Fluids and their mechanics in tumour transit: shaping metastasis
Metastasis is a dynamic succession of events involving the dissemination of tumour cells to distant sites within the body, ultimately reducing the survival of patients with cancer. To colonize distant organs and, therefore, systemically disseminate within the organism, cancer cells and associated factors exploit several bodily fluid systems, which provide a natural transportation route. Indeed, the flow mechanics of the blood and lymphatic circulatory systems can be co-opted to improve the efficiency of cancer cell transit from the primary tumour, extravasation and metastatic seeding. Flow rates, vessel size and shear stress can all influence the survival of cancer cells in the circulation and control organotropic seeding patterns. Thus, in addition to using these fluids as a means to travel throughout the body, cancer cells exploit the underlying physical forces within these fluids to successfully seed distant metastases. In this Review, we describe how circulating tumour cells and tumour-associated factors leverage bodily fluids, their underlying forces and imposed stresses during metastasis. As the contribution of bodily fluids and their mechanics raises interesting questions about the biology of the metastatic cascade, an improved understanding of this process might provide a new avenue for targeting cancer cells in transit.This Review discusses the role of bodily fluids and their underlying forces and imposed stresses in metastasis, highlighting the contributions of fluid mechanics to tumour cell intravasation, intravascular arrest and extravasation as well as to dissemination of tumour-derived factors.
Journal Article
The slime book
\"What kind of fish uses a slime sleeping bag? Which plants capture insects with slime? Find out the answers to these questions and more in this fascinating book about slime!\"-- Publisher's description.
Book
Osmotic diuresis by SGLT2 inhibition stimulates vasopressin‐induced water reabsorption to maintain body fluid volume
Most of the filtered glucose is reabsorbed in the early proximal tubule by the sodium‐glucose cotransporter SGLT2. The glycosuric effect of the SGLT2 inhibitor ipragliflozin is linked to a diuretic and natriuretic effect that activates compensatory increases in fluid and food intake to stabilize body fluid volume (BFV). However, the compensatory mechanisms that are activated on the level of renal tubules remain unclear. Type 2 diabetic Goto‐Kakizaki (GK) rats were treated with vehicle or 0.01% (in diet) ipragliflozin with free access to fluid and food. After 8 weeks, GK rats were placed in metabolic cages for 24‐hr. Ipragliflozin decreased body weight, serum glucose and systolic blood pressure, and increased fluid and food intake, urinary glucose and Na+ excretion, urine volume, and renal osmolar clearance, as well as urine vasopressin and solute‐free water reabsorption (TcH2O). BFV, measured by bioimpedance spectroscopy, and fluid balance were similar among the two groups. Urine vasopressin in ipragliflozin‐treated rats was negatively and positively associated with fluid balance and TcH2O, respectively. Ipragliflozin increased the renal membrane protein expression of SGLT2, aquaporin (AQP) 2 phosphorylated at Ser269 and vasopressin V2 receptor. The expression of SGLT1, GLUT2, AQP1, and AQP2 was similar between the groups. In conclusion, the SGLT2 inhibitor ipragliflozin induced a sustained glucosuria, diuresis, and natriuresis, with compensatory increases in fluid intake and vasopressin‐induced TcH2O in proportion to the reduced fluid balance to maintain BFV. These results indicate that the osmotic diuresis induced by SGLT2 inhibition stimulates compensatory fluid intake and renal water reabsorption to maintain BFV.
We show in this study that SGLT2 inhibitor ipragliflozin induced a sustained glucosuria, diuresis, and natriuresis, with compensatory increases in fluid intake and vasopressin‐induced aquaporin‐2 phosphorylation and solute‐free water reabsorption in proportion to the reduced fluid balance to maintain body fluid volume These results indicate that the osmotic diuresis induced by SGLT2 inhibition stimulates compensatory fluid intake and renal water reabsorption to maintain body fluid volume.
Journal Article
Spit and phlegm
Readers will discover the science behind the gross studying why we need saliva to eat and phlegm to protect ourselves from bacteria and illness.
Book
The body in balance
Focusing on practice more than theory, this collection offers new perspectives for studying the so-called \"humoral medical traditions,\" as they have flourished around the globe during the last 2,000 years. Exploring notions of \"balance\" in medical cultures across Eurasia, Africa and the Americas, from antiquity to the present, the volume revisits \"harmony\" and \"holism\" as main characteristics of those traditions. It foregrounds a dynamic notion of balance and asks how balance is defined or conceptualized, by whom, for whom and in what circumstances. Balance need not connoteegalitarianism or equilibrium. Rather, it alludes to morals of self care exercised in place of excessiveness and indulgences after long periods of a life in dearth. As the moral becomes visceral, the question arises: what constitutes the visceral in a body that is in constant flux and flow? How far, and in what ways, are there fundamental properties or constituents in those bodies?
eBook
Grossology and you
Provides information in a not-so-serious manner about such topics as blood, eyeballs, brains, bruises, constipation, warts, rashes, and more.
Book
Accessing analytes in biofluids for peripheral biochemical monitoring
Peripheral biochemical monitoring involves the use of wearable devices for minimally invasive or noninvasive measurement of analytes in biofluids such as interstitial fluid, saliva, tears and sweat. The goal in most cases is to obtain measurements that serve as surrogates for circulating analyte concentrations in blood. Key technological developments to date include continuous glucose monitors, which use an indwelling sensor needle to measure glucose in interstitial fluid, and device-integrated sweat stimulation for continuous access to analytes in sweat. Further development of continuous sensing technologies through new electrochemical sensing modalities will be a major focus of future research. While there has been much investment in wearable technologies to sense analytes, less effort has been directed to understanding the physiology of biofluid secretion. Elucidating the underlying biology is crucial for accelerating technological progress, as the biofluid itself often presents the greatest challenge in terms of sample volumes, secretion rates, filtration, active analyte channels, variable pH and salinity, analyte breakdown and other confounding factors.Heikenfeld et al. survey the range of biochemical analytes that can be sensed in dermal interstitial fluid, saliva and sweat, and outline criteria for tailoring sensor design to address the right analyte in the right body site for the right disease or wellness application.
Journal Article
Extracellular vesicle isolation and characterization: toward clinical application
Two broad categories of extracellular vesicles (EVs), exosomes and shed microvesicles (sMVs), which differ in size distribution as well as protein and RNA profiles, have been described. EVs are known to play key roles in cell-cell communication, acting proximally as well as systemically. This Review discusses the nature of EV subtypes, strategies for isolating EVs from both cell-culture media and body fluids, and procedures for quantifying EVs. We also discuss proteins selectively enriched in exosomes and sMVs that have the potential for use as markers to discriminate between EV subtypes, as well as various applications of EVs in clinical diagnosis.
Journal Article
Rapid pathogen detection by metagenomic next-generation sequencing of infected body fluids
We developed a metagenomic next-generation sequencing (mNGS) test using cell-free DNA from body fluids to identify pathogens. The performance of mNGS testing of 182 body fluids from 160 patients with acute illness was evaluated using two sequencing platforms in comparison to microbiological testing using culture, 16S bacterial PCR and/or 28S–internal transcribed ribosomal gene spacer (28S–ITS) fungal PCR. Test sensitivity and specificity of detection were 79 and 91% for bacteria and 91 and 89% for fungi, respectively, by Illumina sequencing; and 75 and 81% for bacteria and 91 and 100% for fungi, respectively, by nanopore sequencing. In a case series of 12 patients with culture/PCR-negative body fluids but for whom an infectious diagnosis was ultimately established, seven (58%) were mNGS positive. Real-time computational analysis enabled pathogen identification by nanopore sequencing in a median 50-min sequencing and 6-h sample-to-answer time. Rapid mNGS testing is a promising tool for diagnosis of unknown infections from body fluids.
A universal method enables high-specificity, unbiased pathogen detection from diverse body fluids using metagenomic sequencing and may accelerate clinical decisions.
Journal Article