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Annual Review of Pathology

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https://www.readbyqxmd.com/read/29195051/the-glymphatic-system-in-central-nervous-system-health-and-disease-past-present-and-future
#1
Benjamin A Plog, Maiken Nedergaard
The central nervous system (CNS) is unique in being the only organ system lacking lymphatic vessels to assist in the removal of interstitial metabolic waste products. Recent work has led to the discovery of the glymphatic system, a glial-dependent perivascular network that subserves a pseudolymphatic function in the brain. Within the glymphatic pathway, cerebrospinal fluid (CSF) enters the brain via periarterial spaces, passes into the interstitium via perivascular astrocytic aquaporin-4, and then drives the perivenous drainage of interstitial fluid (ISF) and its solute...
December 1, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/29414251/pathogenesis-of-peripheral-t-cell-lymphoma
#2
Marco Pizzi, Elizabeth Margolskee, Giorgio Inghirami
Peripheral T cell lymphomas (PTCLs) are highly heterogeneous tumors, displaying distinct clinical and biological features. The pathogenesis and normal counterpart of such entities have been elusive for decades. Recent studies have, however, disclosed key mechanisms of peripheral T cell transformation, including (a) the deregulation of signaling pathways controlling T cell development, differentiation, and maturation; (b) the remodeling of the peritumor microenvironment; and (c) the virus-mediated rewiring of T cell biology...
January 24, 2018: Annual Review of Pathology
https://www.readbyqxmd.com/read/29414250/desmosomes-in-human-disease
#3
Nicole A Najor
Tissue integrity is crucial for maintaining the homeostasis of living organisms. Abnormalities that affect sites of cell-cell contact can cause a variety of debilitating disorders. The desmosome is an essential cell-cell junctional protein complex in tissues that undergo stress, and it orchestrates intracellular signal transduction. Desmosome assembly and junctional integrity are required to maintain the overall homeostasis of a tissue, organ, and organism. This review discusses the desmosome and the human diseases associated with its disruption...
January 24, 2018: Annual Review of Pathology
https://www.readbyqxmd.com/read/29414249/recent-insights-into-the-pathogenesis-of-nonalcoholic-fatty-liver-disease
#4
Juan Pablo Arab, Marco Arrese, Michael Trauner
Nonalcoholic fatty liver disease (NAFLD) is a burgeoning health problem worldwide and an important risk factor for both hepatic and cardiometabolic mortality. The rapidly increasing prevalence of this disease and of its aggressive form nonalcoholic steatohepatitis (NASH) will require novel therapeutic approaches based on a profound understanding of its pathogenesis to halt disease progression to advanced fibrosis or cirrhosis and cancer. The pathogenesis of NAFLD involves a complex interaction among environmental factors (i...
January 24, 2018: Annual Review of Pathology
https://www.readbyqxmd.com/read/29414248/epithelial-mesenchymal-transition-in-tumor-metastasis
#5
Vivek Mittal
Metastasis is the major cause of cancer-related deaths; therefore, the prevention and treatment of metastasis are fundamental to improving clinical outcomes. Epithelial mesenchymal transition (EMT), an evolutionarily conserved developmental program, has been implicated in carcinogenesis and confers metastatic properties upon cancer cells by enhancing mobility, invasion, and resistance to apoptotic stimuli. Furthermore, EMT-derived tumor cells acquire stem cell properties and exhibit marked therapeutic resistance...
January 24, 2018: Annual Review of Pathology
https://www.readbyqxmd.com/read/29414247/intrinsic-neuronal-stress-response-pathways-in-injury-and-disease
#6
Madeline M Farley, Trent A Watkins
From injury to disease to aging, neurons, like all cells, may face various insults that can impact their function and survival. Although the consequences are substantially dictated by the type, context, and severity of insult, distressed neurons are far from passive. Activation of cellular stress responses aids in the preservation or restoration of nervous system function. However, stress responses themselves can further advance neuropathology and contribute significantly to neuronal dysfunction and neurodegeneration...
January 24, 2018: Annual Review of Pathology
https://www.readbyqxmd.com/read/29414246/perspectives-from-a-pathologist-my-journey-on-the-path-to-women-s-health-research-sex-and-gender-policy-and-practice-implications
#7
Vivian W Pinn
These words reflect my recollections of major transition points in my life and career: as I first became dedicated to becoming a physician, being introduced to the field of pathology and research, and then transitioning to a somewhat different career focus by becoming the first director of the National Institutes of Health Office of Research on Women's Health. Many of the experiences that I gained during my years in pathology served me well as I made efforts to establish women's health research and sex and gender based studies as scientific endeavors...
January 24, 2018: Annual Review of Pathology
https://www.readbyqxmd.com/read/29083981/genomic-hallmarks-of-thyroid-neoplasia
#8
Thomas J Giordano
The genomic landscape of thyroid cancers that are derived from follicular cells has been substantially elucidated through the coordinated application of high-throughput genomic technologies. Here, I review the common genetic alterations across the spectrum of thyroid neoplasia and present the resulting model of thyroid cancer initiation and progression. This model illustrates the striking correlation between tumor differentiation and overall somatic mutational burden, which also likely explains the highly variable clinical behavior and outcome of patients with thyroid cancers...
January 24, 2018: Annual Review of Pathology
https://www.readbyqxmd.com/read/29140757/new-insights-into-lymphoma-pathogenesis
#9
Kojo S J Elenitoba-Johnson, Megan S Lim
Lymphomas represent clonal proliferations of lymphocytes that are broadly classified based upon their maturity (peripheral or mature versus precursor) and lineage (B cell, T cell, and natural killer cell). Insights into the pathogenetic mechanisms involved in lymphoma impact the classification of lymphoma and have significant implications for the diagnosis and clinical management of patients. Serial scientific and technologic advances over the last 30 years in immunology, cytogenetics, molecular biology, gene expression profiling, mass spectrometry-based proteomics, and, more recently, next-generation sequencing have contributed to greatly enhance our understanding of the pathogenetic mechanisms in lymphoma...
November 15, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/29140756/cellular-and-molecular-mechanisms-of-autoimmune-hepatitis
#10
G J Webb, G M Hirschfield, E L Krawitt, M E Gershwin
Autoimmune hepatitis is an uncommon idiopathic syndrome of immunemediated destruction of hepatocytes, typically associated with autoantibodies. The disease etiology is incompletely understood but includes a clear association with human leukocyte antigen (HLA) variants and other non- HLA gene variants, female sex, and the environment. Pathologically, there is a CD4+ T cell-rich lymphocytic inflammatory infiltrate with variable hepatocyte necrosis and subsequent hepatic fibrosis. Attempts to understand pathogenesis are informed by several monogenetic syndromes that may include autoimmune liver injury, by several drug and environmental agents that have been identified as triggers in a minority of cases, by human studies that point toward a central role for CD4+ effector and regulatory T cells, and by animal models of the disease...
November 15, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/29125798/wnt-%C3%AE-catenin-signaling-in-liver-development-homeostasis-and-pathobiology
#11
Jacquelyn O Russell, Satdarshan S Monga
The liver is an organ that performs a multitude of functions, and its health is pertinent and indispensable to survival. Thus, the cellular and molecular machinery driving hepatic functions is of utmost relevance. The Wnt signaling pathway is one such signaling cascade that enables hepatic homeostasis and contributes to unique hepatic attributes such as metabolic zonation and regeneration. The Wnt/β-catenin pathway plays a role in almost every facet of liver biology. Furthermore, its aberrant activation is also a hallmark of various hepatic pathologies...
November 9, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/29099651/nutritional-interventions-for-mitochondrial-oxphos-deficiencies-mechanisms-and-model-systems
#12
Adam J Kuszak, Michael Graham Espey, Marni J Falk, Marissa A Holmbeck, Giovanni Manfredi, Gerald S Shadel, Hilary J Vernon, Zarazuela Zolkipli-Cunningham
Multisystem metabolic disorders caused by defects in oxidative phosphorylation (OXPHOS) are severe and often lethal, conditions. Inborn errors of OXPHOS function are termed primary mitochondrial disorders (PMDs), and the use of nutritional interventions is routine in their supportive management. However, detailed mechanistic understanding and evidence for efficacy and safety of these interventions are limited. Preclinical cellular and animal model systems are important tools to investigate PMD metabolic mechanisms and therapeutic strategies...
November 3, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/29099650/new-insights-into-graft-versus-host-disease-and-graft-rejection
#13
Eric Perkey, Ivan Maillard
Allogeneic transplantation of foreign organs or tissues has lifesaving potential, but can lead to serious complications. After solid organ transplantation, immune-mediated rejection mandates the use of prolonged global immunosuppression and limits the life span of transplanted allografts. After bone marrow transplantation, donor-derived immune cells can trigger life-threatening graft-versus-host disease. T cells are central mediators of alloimmune complications and the target of most existing therapeutic interventions...
November 3, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/29068753/cancer-metastasis-a-reappraisal-of-its-underlying-mechanisms-and-their-relevance-to-treatment
#14
Nicolo Riggi, Michel Aguet, Ivan Stamenkovic
Metastases are responsible for the vast majority of cancer-related deaths, but, despite intense efforts to understand their underlying mechanisms with the goal of uncovering effective therapeutic targets, treatment of metastatic cancer has progressed minimally. In this review, we examine the biological programs currently proposed to be key drivers of metastasis. On the basis of evidence from a growing body of research, we discuss to what extent the cellular and molecular mechanisms that are suggested to underlie cancer cell dissemination are specific to the metastatic process, as opposed to representing natural primary tumor progression...
October 25, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/29059010/stem-cell-pathology
#15
Dah-Jiun Fu, Andrew D Miller, Teresa L Southard, Andrea Flesken-Nikitin, Lora H Ellenson, Alexander Yu Nikitin
Rapid advances in stem cell biology and regenerative medicine have opened new opportunities for better understanding disease pathogenesis and the development of new diagnostic, prognostic, and treatment approaches. Many stem cell niches are well defined anatomically, thereby allowing their routine pathological evaluation during disease initiation and progression. Evaluation of the consequences of genetic manipulations in stem cells and investigation of the roles of stem cells in regenerative medicine and pathogenesis of various diseases such as cancer require significant expertise in pathology for accurate interpretation of novel findings...
October 20, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/28934563/hemophagocytic-lymphohistiocytosis
#16
Hanny Al-Samkari, Nancy Berliner
Hemophagocytic lymphohistiocytosis is a life-threatening disorder characterized by unbridled activation of cytotoxic T lymphocytes, natural killer (NK) cells, and macrophages resulting in hypercytokinemia and immunemediated injury of multiple organ systems. It is seen in both children and adults and is recognized as primary (driven by underlying genetic mutations that abolish critical proteins required for normal function of cytotoxic T cells and NK cells) or secondary (resulting from a malignant, infectious, or autoimmune stimulus without an identifiable underlying genetic trigger)...
September 13, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/28135565/dissecting-clinical-heterogeneity-in-neurofibromatosis-type-1
#17
REVIEW
Courtney L Monroe, Sonika Dahiya, David H Gutmann
Neurofibromatosis type 1 (NF1) is a common neurogenetic disorder in which affected children and adults are predisposed to the development of benign and malignant nervous system tumors. Caused by a germline mutation in the NF1 tumor suppressor gene, individuals with NF1 are prone to optic gliomas, malignant gliomas, neurofibromas, and malignant peripheral nerve sheath tumors, as well as behavioral, cognitive, motor, bone, cardiac, and pigmentary abnormalities. Although NF1 is a classic monogenic syndrome, the clinical features of the disorder and their impact on patient morbidity are variable, even within individuals who bear the same germline NF1 gene mutation...
January 24, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/28135564/disorders-of-astrocytes-alexander-disease-as-a-model
#18
REVIEW
Markel Olabarria, James E Goldman
Astrocytes undergo important phenotypic changes in many neurological disorders, including strokes, trauma, inflammatory diseases, infectious diseases, and neurodegenerative diseases. We have been studying the astrocytes of Alexander disease (AxD), which is caused by heterozygous mutations in the GFAP gene, which is the gene that encodes the major astrocyte intermediate filament protein. AxD is a primary astrocyte disease because GFAP expression is specific to astrocytes in the central nervous system (CNS). The accumulation of extremely large amounts of GFAP causes many molecular changes in astrocytes, including proteasome inhibition, stress kinase activation, mechanistic target of rapamycin (mTOR) activation, loss of glutamate and potassium buffering capacity, loss of astrocyte coupling, and changes in cell morphology...
January 24, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/28135563/pathogenesis-and-pathology-of-mastocytosis
#19
REVIEW
Dean D Metcalfe, Yoseph A Mekori
Systemic mastocytosis is a clonal disorder of mast cells that may variably present with characteristic skin lesions, episodes of mast cell mediator release, and disturbances of hematopoiesis. No curative therapy presently exists. Conventional management has relied on agents that antagonize mediators released by mast cells, inhibit mediator secretion, or modulate mast cell proliferation. Recent advances in the molecular understanding of the pathophysiology of systemic mastocytosis have provided new therapeutic considerations, including new and novel tyrosine kinase inhibitors...
January 24, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/28135562/circulating-tumor-cells-fluid-surrogates-of-solid-tumors
#20
REVIEW
J-A Thiele, K Bethel, M Králíčková, P Kuhn
Evaluation of circulating tumor cells (CTCs) has demonstrated clinical validity as a prognostic tool based on enumeration, but since the introduction of this tool to the clinic in 2004, further clinical utility and widespread adoption have been limited. However, immense efforts have been undertaken to further the understanding of the mechanisms behind the biology and kinetics of these rare cells, and progress continues toward better applicability in the clinic. This review describes recent advances within the field, with a particular focus on understanding the biological significance of CTCs, and summarizes emerging methods for identifying, isolating, and interrogating the cells that may provide technical advantages allowing for the discovery of more specific clinical applications...
January 24, 2017: Annual Review of Pathology
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