scholarly journals On the history and some characteristics of neuroendocrine tumors of the gastrointestinal tract. Neuroendocrine tumors of the pancreas. Part 2

2021 ◽  
pp. 70-81
Author(s):  
S. I. Rybakov
Keyword(s):  
Gastrointestinal Tract ◽  
Neuroendocrine Tumors ◽  
Endocrine System ◽  
Secretory Activity ◽  
Clinical Syndrome ◽  
Biologically Active ◽  
Clinical Aspects ◽  
Clinical Syndromes ◽  
Diffuse Endocrine System ◽  
Active Substances

The literature review presents the analysis of numerous studies that have formed the basis for creating ideas about the diffuse endocrine system,namely existence of the cellular accumulations and individual cells that produce various hormones and biologically active substances in addition to the main endocrine glands. Several types of endocrine cells with these functionshave been established, in particular, in the organs of the gastrointestinal tract, starting from the esophagus and up to the terminal parts of the large intestine. Most of them are contained in the pancreas, antrum of the stomach, duodenum, the initial part of the intestine, in the liver. Excessive secretory activity of these cells can cause the development of pathological clinical syndromes, characterized by the effects of the corresponding hormones. The tumors or diffuse hyperplasia of the corresponding cellsmay present morphological substrate of such syndromes. The author considers the pancreas as an integral part of the diffuse endocrine system, as specific endocrine functions in it perform numerous accumulations (islets of Langerhans) or individual cells. The review of the numerous neuroendocrine tumors of the gastrointestinal tract examines in detail the characteristics of some of them in historical and clinical aspects, in particular Zollinger—Ellison syndrome as the most common and well-studied tumor. Glucagonoma is also considered as a neuroendocrine tumorderived from α-cells of the pancreas, is a kind of insulinoma antagonist, as it secretes an excess of the hormone glucagon, causing the development of hyperglycemic clinical syndrome in contrast to hypoglycemic, caused by insulin. It is a rare tumor and its consideration after insulinoma can be explained by the antagonistic nature of the action of hormones produced by these tumors. In the group of neuroendocrine tumors of the pancreas, glucagonoma follows the frequency of insulinoma and gastrinoma.

scholarly journals On the history and some characteristics of neuroendocrine tumors of the gastrointestinal tract. Review. Part 1

2021 ◽  
pp. 60-72
Author(s):  
S. Rybakov
Keyword(s):  
Gastrointestinal Tract ◽  
Neuroendocrine Tumors ◽  
Endocrine System ◽  
Secretory Activity ◽  
Clinical Syndrome ◽  
Biologically Active ◽  
Clinical Aspects ◽  
Clinical Syndromes ◽  
Diffuse Endocrine System ◽  
Active Substances

The literature review is devoted to the analysis of numerous studies that have formed the basis for creating ideas about the diffuse endocrine system. In addition to the main endocrine glands, also there are cellular accumulations and individual cells that produce various hormones and biologically active substances. It is established that, in particular, in the organs of the gastrointestinal tract, starting from the esophagus and to the terminal parts of the large intestine, there are several types of endocrine cells with these functions. Most of them are in the pancreas, antrum of the stomach, duodenum, the initial part of the intestine, in the liver. Excessive secretory activity of these cells can cause the development of pathological clinical syndromes, characterized by the effect of the corresponding hormones. The morphological substrate of such syndromes may be tumors or diffuse hyperplasia of the corresponding cells. The author considers the pancreas as an integral part of the diffuse endocrine system, as specific endocrine functions in it perform numerous accumulations (islets of Langerhans) or individual cells. The review of the numerous neuroendocrine tumors of the gastrointestinal tract examines in detail the characteristics of some of them in historical and clinical aspects, in particular insulinoma as the most common and well-studied tumor. Glucagonoma is also considered as a neuroendocrine tumor derived from α-cells of the pancreas, is a kind of insulinoma antagonist, as it secretes an excess of the hormone glucagon, causing the development of hyperglycemic clinical syndrome in contrast to hypoglycemic, caused by insulin. It is a rare tumor and its consideration after insulinoma can be explained by the antagonistic nature of the action of hormones produced by these tumors. In the group of neuroendocrine tumors of the pancreas, glucagonoma follows the frequency of insulinoma and gastrinoma.

Gastrointestinal Neuroendocrine Tumors: Clinical and Pathological Correlates

2019 ◽  
Vol 03 (01) ◽  
pp. 003-013
Author(s):  
Sanjit Datta ◽  
Annika Sinha ◽  
Baljendra Kapoor
Keyword(s):  
Neuroendocrine Tumors ◽  
Somatostatin Receptor ◽  
Management Strategies ◽  
Survival Rates ◽  
Endocrine System ◽  
Treatment Modalities ◽  
Clinical Syndromes ◽  
Wide Range ◽  
Poorly Differentiated ◽  
Diffuse Endocrine System

AbstractGastrointestinal neuroendocrine tumors (GI-NETs), previously classified as carcinoid tumors, are rare cancers that arise from cells of the diffuse endocrine system of the gastrointestinal tract. These tumors most commonly arise from the bronchus, jejunoileum, or colon/rectum. They produce peptide products that can lead to identifiable clinical syndromes such as carcinoid syndrome, which is classically associated with diarrhea, flushing, and heart disease. The latest classifications of GI-NETs include pancreatic NETs, which can produce a wide range of pancreatic hormones leading to syndromes such as Zollinger–Ellison's syndrome. The prognosis for patients with GI-NETs varies widely depending on the size, location, and presence of metastatic disease, with 5-year survival rates ranging from 0 to 15% for poorly differentiated NETs and 10-year survival rates of up to 100% for patients with insulinomas smaller than 2 cm. A wide range of treatment modalities is commonly used to treat GI-NETs, including surgical and endoscopic resection, locoregional therapies, cytotoxic chemotherapy, and somatostatin receptor targeted therapy. The goal of this review is to detail the classification, epidemiology, clinical syndromes, diagnosis, and staging of these tumors and to provide an overview of management strategies.

Chromogranin a Measurement in Neuroendocrine Tumors

1998 ◽  
Vol 13 (1) ◽  
pp. 3-9 ◽  
Author(s):  
L. Ferrari ◽  
E. Seregni ◽  
A. Martinetti ◽  
B Van Graafeiland ◽  
S. Nerini-Molteni ◽  
...  
Keyword(s):  
Tumor Marker ◽  
Neuroendocrine Tumors ◽  
Chromogranin A ◽  
High Sensitivity ◽  
Biologically Active ◽  
Proliferative Index ◽  
Favorable Prognosis ◽  
Blood Marker ◽  
Active Substances

Neuroendocrine tumors (NETs) are rare neoplasms characterized by a low proliferative index and, in some cases, a favorable prognosis. These tumors often overproduce and release biologically active substances that are responsible for severe syndromes. Tumor marker measurement provides the clinician with useful information for the management of NET patients. The substances released by overproducing tumors are currently used as biomarkers, but there is a need for sensitive markers also for the “biochemically silent” NETs. The most effective and reliable blood marker available today is chromogranin A (CgA). Because of its high sensitivity and specificity, this glycoprotein can be used for the diagnosis, prognosis and follow-up of NETs. Furthermore, CgA measurement can be used for monitoring those tumors not overproducing or releasing any hormones or biological amines. This paper is a synthetic review on the value of CgA in NET management and reports our experiences with CgA measurement in NET patients.

scholarly journals Effects of biologically active substances on interior indicators of pigs in the early postnatal period

2019 ◽  
pp. 69-72
Author(s):  
Olga Nikolaevna Polozyuk ◽  
Tatyana Ivanovna Lapina
Keyword(s):  
Gastrointestinal Tract ◽  
Blood Serum ◽  
Dietary Supplements ◽  
Postnatal Period ◽  
Biologically Active ◽  
Control Group ◽  
Control Groups ◽  
And Control ◽  
Experimental Group ◽  
Active Substances

The authors found out that the application  of dietary supplements "Glimalask Lact" allowed preventing the disorder of the gastrointestinal tract and saving all piglets throughout the experiment.  After application of "Agrocid super oligo", the safety of purebred piglets was 100 %, and for two pedigree piglets it was 96.7%.   In piglets of the 1st and 2nd control groups, disorder of the gastrointestinal tract was noted during the completion of colostral immunity and at weaning from sows.  The safety of purebred piglets was 96.7%, and of the two pedigree piglets  it was 93.4%. The number of γg-globulins in the blood serum of two breed piglings treated with the Glimalask Lact supplement increased by 3.5 and 2.5% compared to the piglets of the experimental group fed with Agrocid super oligo, and of the control group, The number of g-globulins in the blood serum of purebred  piglets it increased by 2.4 and 3.1% compared with analogues of the experimental and control groups.

scholarly journals CLINICAL VALUE OF BIOCHEMICAL MARKERS OF NEUROENDOCRINE TUMORS

2019 ◽  
Vol 19 (1S) ◽  
pp. 28-29
Author(s):  
N V Lyubimova ◽  
Yu S Timofeev ◽  
M G Toms ◽  
T Yu Kharitidi ◽  
O I Vashketova ◽  
...  
Keyword(s):  
Neuroendocrine Tumors ◽  
Biochemical Markers ◽  
Chromogranin A ◽  
Endocrine System ◽  
Progression Free Survival ◽  
High Sensitivity ◽  
Biologically Active ◽  
Clinical Value ◽  
Diagnostic Significance

Neuroendocrine tumors (NET) is a heterogeneous group of epithelial neoplasms that develop from cells of the diffuse endocrine system and found in any organ. A distinctive feature of NET is the ability to produce various biologically active peptides and amines. Currently, the most useful markers are the universal marker chromogranin-A (CgA) and specific markers serotonin and 5-hydroxyindolylacetic acid (5-HIAA). The analysis of the clinical significance of the biochemical markers of NETs was carried out by comparative analysis of their levels in serum and urine of 339 NET patients and 66 healthy people. Determination of plasma CgA, serotonin in serum and 5-HIAA in daily urine was performed using standardized ELISA methods using the Chromogranin A ELISA kit (Dako), Serotonin ELISA and 5-HIAA ELISA (IBL) test-systems. The values of CgA, serotonin, 5-HIAA in patients with NET were significantly (p < 0.001) higher than the corresponding control values. Assessment of the diagnostic significance of CgA, taking into account the cut-off level 33 U/l (with a specificity of 98.5%), showed high sensitivity in the general NET group - 80.9%. The serial determination of the marker reflected the effect of treatment. The progression free survival in different treatment regimens for patients with NET has been associated with basal levels of CgA. The medians of serotonin and 5-HIAA levels were maximal in patients with carcinoid syndrome, significantly exceeding the corresponding values in NET patients without clinical manifestations.The data indicate the possibility of using CgA, serotonin and 5-HIAA to improve the accuracy of diagnosis, evaluation of generalization and biological activity of NETs.

scholarly journals Low histamine resistance syndrome: is it cause or result of gastrointestinal tract pathology?

2020 ◽  
pp. 152-157
Author(s):  
M. S. Turchina ◽  
Z. V. Karaseva
Keyword(s):  
Gastrointestinal Tract ◽  
Allergic Diseases ◽  
Biologically Active ◽  
Functional Disorders ◽  
Medical Practitioners ◽  
Anaphylactoid Reactions ◽  
The Russian Federation ◽  
Irritable Bowel ◽  
Active Substances

Currently, in the Russian Federation, as well as throughout the world, there is an increase in allergic diseases, including an increase in the number of gastrointestinal manifestations of allergies. Moreover, along with Ig-E-mediated reactions, anaphylactoid reactions occur due to the excessive release of histamine and other biologically active substances from mast cells. These pathological processes can contribute to exacerbation of functional disorders of the gastrointestinal tract, enhancing subclinical inflammation of the mucous membrane, contributing to the development of visceral hypersensitivity and gastrointestinal motility. At the same time, most medical practitioners do not pay due attention to the possible impact of allergic and pseudo-allergic reactions on the course of irritable bowel syndrome and functional dyspepsia. At the same time, it is necessary to take into account that in the case of the syndrome of low resistance to histamine in most patients, the introduction of restrictions on the diet is sufficient and there is no need to prescribe excess drugs. Given the widespread prevalence of functional disorders of the gastrointestinal tract and their significant impact on the quality of life of patients, it is necessary to search for new methods of prevention and treatment of this group of pathological conditions.

COLONIC MICROBIOTA AND CHRONIC KIDNEY DISEASE. MESSAGE ONE

2018 ◽  
Vol 22 (4) ◽  
pp. 57-73 ◽  
Author(s):  
B. G. Lukichev ◽  
A. Sh. Rumyantsev ◽  
V. Akimenko
Keyword(s):  
Chronic Kidney Disease ◽  
Gastrointestinal Tract ◽  
Kidney Disease ◽  
Literature Review ◽  
Biologically Active ◽  
Main Attention ◽  
Mechanical Removal ◽  
Starting Point ◽  
Active Substances

Interest in studying the role of the gastrointestinal tract in maintaining homeostasis in chronic kidney disease is a traditional one. It served, in particular, as a starting point for the  creation of enterosorbents. However, if earlier the main attention  was paid to the mechanical removal of a number of potentially  dangerous biologically active substances, recently an intestinal  microbiota has become an object of interest. The first part of the  literature review on this topic is devoted to questions of terminology, the normal physiology of the colon microbiota. A  detailed description of dysbiosis is given. The features of the main  groups of microorganisms are reflected. The hypothetical and  confirmed interrelations of the intestine-kidney axis are presented.  The pathogenetic mechanisms of the colon dysbiosis influence on the processes of local and systemic inflammation are discussed. The  influence of dysbiosis on the state of the kidney parenchyma and its  participation in the progression of CKD are debated.

Neuroendocrine tumors in children and young adults: Incidence, survival, and prevalence in the United States

2009 ◽  
Vol 27 (15_suppl) ◽  
pp. e22120-e22120
Author(s):  
M. S. O'Dorisio ◽  
P. Navalkele ◽  
T. M. O'Dorisio ◽  
C. F. Lynch
Keyword(s):  
United States ◽  
Young Adults ◽  
Young People ◽  
Neuroendocrine Tumors ◽  
Endocrine System ◽  
The United States ◽  
Seer Data ◽  
Children And Young Adults ◽  
Diffuse Endocrine System ◽  
Incidence Prevalence

e22120 Background: Neuroendocrine tumors (NET) arising from the diffuse endocrine system are thought to be quite rare in children and young adults. However, a surprising number of young people have been referred to our neuroendocrine tumor clinic and the NCI has targeted NET as a high priority for development of new diagnostic and therapeutic options. This analysis of the SEER database was undertaken to determine the incidence, prevalence, and survival of NET in young people. Their incidence, prevalence, and survival were compared with neuroblastoma, a related pediatric malignancy arising in the neural crest. Methods: The SEER data were obtained from 9 standard SEER registries for the diagnosis years of 1975 to 2004 using SEER*Stat version 6.4.4. ICD-9 codes related to neuroendocrine tumors and to neuroblastoma were characterized as to patient age, gender, racial and ethnic background, stage, grade, histology, incidence, survival, and prevalence. Results: Neuroendocrine tumors occur more often in females among children and young adults with the most common sites being bronchial, ovarian, and breast. The overall incidence of neuroendocrine tumors was lower than for neuroblastoma in the age range 0–30 years. However, the 30 year limited prevalence of neuroendocrine tumors in the 9 SEER registries was 698 compared to 881 for neuroblastoma. This extrapolated to over 7000 children and young adults with neuroendocrine tumors across the United States. Survival rate of young people with neuroendocrine tumors declined from 84% in 1975–1986 to 80% in the 1987–2004 era. Conclusions: These results indicate that neuroendocrine tumors constitute an unrecognized cancer threat to children and young adults. Survival of children and young adults with neuroendocrine tumors has decreased over the past 30 years in the United States. We recommend the establishment of centers of care for children and young adults diagnosed with neuroendocrine tumors with the expectation that earlier diagnosis coupled with targeted therapies will decrease the incidence of metastatic disease and improve survival. No significant financial relationships to disclose.

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