scholarly journals Gastrin and the Moderate Hypergastrinemias

2021 ◽  
Vol 22 (13) ◽  
pp. 6977
Author(s):  
Jens F. Rehfeld
Keyword(s):  
Helicobacter Pylori ◽  
Plasma Concentrations ◽  
Antral Mucosa ◽  
Serum Concentrations ◽  
Health Issues ◽  
Gastrin Secretion ◽  
Mucosal Growth ◽  
Early Phases ◽  
Molecular Nature ◽  
Concentration Levels

The antral hormone gastrin potently regulates gastric acid secretion and fundic mucosal growth. Consequently, appropriate gastrin secretion and plasma concentrations are important for the early phases of digestion. This review describes as the first premise the normal biogenesis of gastrin in the antral mucosa, but also mentions the extraantral expression. Subsequently, the molecular nature and concentration levels of gastrin in serum or plasma are overviewed. Third, assays for accurate measurements of plasma or serum concentrations are commented. Finally, the problem of moderate hypergastrinemia due to Helicobacter pylori infections and/or treatment with proton-pump inhibitors (PPI) is discussed. The review concludes that accurate measurement of the true concentrations of bioactive gastrins in plasma is important. Moreover, it suggests that moderate hypergastrinemias are also essential health issues that require serious attention.

scholarly journals The Effect of Bilateral Nephrectomy on Renalase and Catecholamines in Hemodialysis Patients

2021 ◽  
Vol 18 (12) ◽  
pp. 6282
Author(s):  
Magda Wiśniewska ◽  
Natalia Serwin ◽  
Violetta Dziedziejko ◽  
Małgorzata Marchelek-Myśliwiec ◽  
Barbara Dołęgowska ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Plasma Concentrations ◽  
Serum Levels ◽  
Hemodialysis Patients ◽  
Pressure Regulation ◽  
Serum Concentrations ◽  
Monoamine Oxidase Activity ◽  
Normal Kidney ◽  
Bilateral Nephrectomy ◽  
Arterial Blood

Background/Aims: Renalase is an enzyme with monoamine oxidase activity that metabolizes catecholamines; therefore, it has a significant influence on arterial blood pressure regulation and the development of cardiovascular diseases. Renalase is mainly produced in the kidneys. Nephrectomy and hemodialysis (HD) may alter the production and metabolism of renalase. The aim of this study was to examine the effect of bilateral nephrectomy on renalase levels in the serum and erythrocytes of hemodialysis patients. Methods: This study included 27 hemodialysis patients post-bilateral nephrectomy, 46 hemodialysis patients without nephrectomy but with chronic kidney disease and anuria and 30 healthy subjects with normal kidney function. Renalase levels in the serum and erythrocytes were measured using an ELISA kit. Results: Serum concentrations of renalase were significantly higher in post-bilateral nephrectomy patients when compared with those of control subjects (101.1 ± 65.5 vs. 19.6 ± 5.0; p < 0.01). Additionally, renalase concentrations, calculated per gram of hemoglobin, were significantly higher in patients after bilateral nephrectomy in comparison with those of healthy subjects (994.9 ± 345.5 vs. 697.6 ± 273.4, p = 0.015). There were no statistically significant differences in plasma concentrations of noradrenaline or adrenaline. In contrast, the concentration of dopamine was significantly lower in post-nephrectomy patients when compared with those of healthy subjects (116.8 ± 147.7 vs. 440.9 ± 343.2, p < 0.01). Conclusions: Increased serum levels of renalase in post-bilateral nephrectomy hemodialysis patients are likely related to production in extra-renal organs as a result of changes in the cardiovascular system and hypertension.

scholarly journals Fluctuations in blood biomarkers of head trauma in NCAA football athletes over the course of a season

2019 ◽  
Vol 130 (5) ◽  
pp. 1655-1662 ◽  
Author(s):  
Jonathan M. Oliver ◽  
Anthony J. Anzalone ◽  
Jason D. Stone ◽  
Stephanie M. Turner ◽  
Damond Blueitt ◽  
...  
Keyword(s):  
Head Trauma ◽  
Plasma Concentrations ◽  
Objective Measure ◽  
American Football ◽  
Neurological Injury ◽  
Cumulative Exposure ◽  
Serum Concentrations ◽  
Blood Biomarkers ◽  
Head Impacts ◽  
Subconcussive Head Trauma

OBJECTIVERepetitive subconcussive head trauma is a consequence of participation in contact sports and may be linked to neurodegenerative diseases. The degree of neurological injury caused by subconcussive head trauma is not easily detectible, and this injury does not induce readily identifiable clinical signs or symptoms. Recent advancements in immunoassays make possible the detection and quantification of blood biomarkers linked to head trauma. Identification of a blood biomarker that can identify the extent of neurological injury associated with subconcussive head trauma may provide an objective measure for informed decisions concerning cumulative exposure to subconcussive head trauma. The purpose of the current study was to examine changes in the blood biomarkers of subconcussive head trauma over the course of an American football season.METHODSThirty-five National Collegiate Athletic Association (NCAA) American football athletes underwent blood sampling throughout the course of a football season. Serial samples were obtained throughout the 2016 season, during which the number and magnitude of head impacts changed. Blood samples were analyzed for plasma concentrations of tau and serum concentrations of neurofilament light polypeptide (NF-L). Athletes were grouped based on their starter status, because athletes identified as starters are known to sustain a greater number of impacts. Between-group differences and time-course differences were assessed.RESULTSIn nonstarters, plasma concentrations of tau decreased over the course of the season, with lower values observed in starters; this resulted in a lower area under the curve (AUC) (starters: 416.78 ± 129.17 pg/ml/day; nonstarters: 520.84 ± 163.19 pg/ml/day; p = 0.050). Plasma concentrations of tau could not be used to discern between starters and nonstarters. In contrast, serum concentrations of NF-L increased throughout the season as head impacts accumulated, specifically in those athletes categorized as starters. The higher serum concentrations of NF-L observed in starters resulted in a larger AUC (starters: 1605.03 ± 655.09 pg/ml/day; nonstarters: 1067.29 ± 272.33 pg/ml/day; p = 0.007). The AUC of the receiver operating characteristic curve analyses displayed fair to modest accuracy to identify athletes who were starters with the use of serum NF-L following periods of repetitive impacts.CONCLUSIONSThe different patterns observed in serum NF-L and plasma tau concentrations provide preliminary evidence for the use of blood biomarkers to detect the neurological injury associated with repetitive subconcussive head trauma. Although further investigation is necessary, such findings might lay the foundation for the further development of an objective measure for the detection of neurological injury caused by subconcussive head trauma.

scholarly journals Helicobacter pylori Infection and the Patterns of Gastric Mucin Expression in Children

2020 ◽  
Vol 9 (12) ◽  
pp. 4030
Author(s):  
Ana-Maria Teodora Domșa ◽  
Raluca Lupușoru ◽  
Dan Gheban ◽  
Alexandra Buruiană-Simic ◽  
Bogdan Alexandru Gheban ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Risk Factor ◽  
Monoclonal Antibodies ◽  
Chronic Inflammation ◽  
Gastric Carcinogenesis ◽  
Antral Mucosa ◽  
Mucin Expression ◽  
Muc2 Expression ◽  
H Pylori ◽  
The Impact

Background: The updated model for the mechanism of gastric carcinogenesis demonstrates that Helicobacter pylori (H. pylori) is a risk factor in every step of the process. The expression of certain gastric mucins is altered by H. pylori infection in adult patients. The aim of our research was to assess the impact of H. pylori infection on the expression of secretory mucins in the pediatric antral mucosa. Methods: Slides were stained with monoclonal antibodies for MUC5AC, MUC6 and MUC2, digitalized and scored using both a semiquantitative and a quantitative approach. Results: The expression of MUC5AC was significantly lower in infected children. Also, MUC2 expression was more pronounced in infected children. MUC6 expression did not differentiate between infected and noninfected children. Additionally, the presence of chronic inflammation significantly altered the expression of MUC6 and MUC2. The expression of MUC6 was significantly higher in patients with gastric atrophy. Conclusion: The minor differences in mucin expression at distinct ages might stem from different H. pylori exposure periods. Further research is needed to determine the particular patterns of expression according to age and to evaluate the effects of the interaction between H. pylori and mucins in the progression of the gastric carcinogenesis cascade.

Long-term effects of Helicobacter pylori eradication on gastric antral mucosa in duodenal ulcer patients

2000 ◽  
Vol 12 (7) ◽  
pp. 719-725 ◽  
Author(s):  
Frank Zerbib ◽  
Christine Lenk ◽  
Bassem Sawan ◽  
Rémy Cayla ◽  
Nathalie Broutet ◽  
...  
Keyword(s):  
Duodenal Ulcer ◽  
Helicobacter Pylori ◽  
Antral Mucosa ◽  
Long Term Effects ◽  
Helicobacter Pylori Eradication

scholarly journals Chronic gastritis and Helicobacter pylori in digestive form of Chagas' disease

1993 ◽  
Vol 35 (2) ◽  
pp. 117-121 ◽  
Author(s):  
A. J. A. Barbosa ◽  
D. M. M. Queiroz ◽  
A. M. M. F. Nogueira ◽  
M. J. A. Roquette Reis ◽  
E. N. Mendes ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Gastric Mucosa ◽  
Atrophic Gastritis ◽  
Chagas Disease ◽  
Chronic Gastritis ◽  
Antral Mucosa ◽  
Common Cause ◽  
Superficial Gastritis ◽  
H Pylori ◽  
Inflammatory Changes

Patients with the digestive form of Chagas'disease frequently present chronic gastritis. As the microorganism Helicobacter pylori is now accepted as the most common cause of human chronic gastritis, the present work was undertaken to verify a possible relationship between the presence of this bacterium and inflammatory changes of antral mucosa in chagasic patients. Seventeen chagasics, with megaesophagus and or megacolon were studied. Fragments from two different regions of antral mucosa were obtained by endoscopy, fixed in 4% neutral formaldehyde and embedded in paraffin. The sections were stained by haematoxylin and eosin for histology analysis, and by carbolfuchsin for H. pylori identification. H. pylori was found in 16 (94.1%) chagasic patients, all of them presenting chronic gastritis. Superficial gastritis was seen in 9 (52.9%) while atrophic gastritis was present in 8 (47.1%) patients. H. pylori was present on gastric mucosa of 8 (100%) patients with atrophic gastritis and of 8 (88.8%) patients with superficial gastritis. We concluded that the microorganism H. pylori should be considered a possible factor connected with the etiopathogenesis of chronic superficial and atrophic gastritis frequently observed in patients with the digestive form of Chagas' disease.

Helicobacter pylori alters gastric epithelial cell cycle events and gastrin secretion in Mongolian gerbils

2000 ◽  
Vol 118 (1) ◽  
pp. 48-59 ◽  
Author(s):  
Richard M. Peek ◽  
Hans–Peter Wirth ◽  
Steven F. Moss ◽  
Manqiao Yang ◽  
A.M. Abdalla ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Helicobacter Pylori ◽  
Epithelial Cell ◽  
Gastric Epithelial Cell ◽  
Mongolian Gerbils ◽  
Gastrin Secretion

scholarly journals Lactoferrin Levels in the Gastric Tissue ofHelicobacter pylori-Positive and -Negative Patients and Its Effect on Anemia

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Yaşar Doğan ◽  
Tülay Erkan ◽  
Zerrin Önal ◽  
Merve Usta ◽  
Gülen Doğusoy ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Abdominal Pain ◽  
Iron Deficiency ◽  
Iron Deficiency Anemia ◽  
Serum Ferritin ◽  
Ferritin Level ◽  
Deficiency Anemia ◽  
Antral Mucosa ◽  
Gastric Tissue ◽  
Negative Controls

Aim. To determine gastric tissue lactoferrin (Lf) levels ofHelicobacter pylori-(Hp-) positive and -negative patients and its effect on anemia.Methods. Cases in which initial presentation was of abdominal pain and that were Hp-positive at endoscopy were included. Hp-positive cases and -negative controls were divided into two groups.Results. The study included 64 cases (average: years, 39 male and 25 female). Lf levels were subsequently studied on 61 cases. 45 (73.8%) of these were Hp-positive, while 16 (22.2%) were Hp-negative. In Hp-positive cases, mean staining percentages and density of glands in the antral mucosa were % and , respectively. Hp-negative cases showed significantly different values of % and , respectively. Hemoglobin and serum ferritin values of Hp-positive cases were /dL and /mL, but these were comparable with Hp-negative cases (/dL and /mL).Conclusions.Tissue Lf was significantly higher in Hp-positive cases compared to Hp-negative cases, but no difference was observed between the two groups with regards to hemoglobin and ferritin level. As a result, it is difficult to say that this rise in Lf plays a role in the development of iron deficiency anemia in Hp-positive patients.

scholarly journals Adiponectin and proteinuria in normotensive and hypertensive rats

2018 ◽  
Author(s):  
Carolina da Silva ◽  
Dora Maria Grassi Kassisse ◽  
Filipy Borghi ◽  
Camila Morais ◽  
Priscila Cristina da Silva
Keyword(s):  
Renal Dysfunction ◽  
Spontaneously Hypertensive Rats ◽  
Wistar Rats ◽  
Plasma Concentrations ◽  
Renal Diseases ◽  
Serum Concentrations ◽  
Hypertensive Rats ◽  
Spontaneously Hypertensive ◽  
Systemic Arterial Hypertension ◽  
Wistar Kyoto

Adiponectin is an anti-inflammatory adipokine produced by adipose tissue and its concentration is depressed in obesity and systemic arterial hypertension. Studies have established a relationship between the adiponectin plasma concentration and complications such as obesity and renal diseases. Proteinuria indicates renal dysfunction or infection and has a negative correlation with adiponectin plasma concentrations. The Wistar-Kyoto (WKY) and spontaneously hypertensive rats (SHR) exhibited higher urinary protein concentrations when compared to Wistar rats (WIS). Therefore, this study aimed to evaluated the serum concentrations of adiponectin and its relation to proteinuria in these rats. The results indicate that WKY present a reduction in the adiponectin serum concentration when compared to WIS and SHR. The low production of adiponectin is related to proteinuria and to the heavy weight of these animals. SHR exhibit similar serum adiponectin levels to WIS, suggesting the hypertension as the responsible factor for the renal dysfunction.

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