The influence of α-fluoromethylhistidine on the regional brain histamine and plasma corticosterone levels in aging

1987 ◽  
Vol 65 (10) ◽  
pp. 2154-2157 ◽  
Author(s):  
I. Mazurkiewicz-Kwilecki ◽  
Simon Nsonwah
Keyword(s):  
Histidine Decarboxylase ◽  
Brain Regions ◽  
Plasma Corticosterone ◽  
Decarboxylase Inhibitor ◽  
Brain Histamine ◽  
Regional Brain ◽  
Histamine Synthesis ◽  
Hypothalamic Histamine ◽  
Old Rats

α-Fluoromethylhistidine, a histidine decarboxylase inhibitor, induced a significant depletion in the hypothalamic, midbrain, and cortical brain histamine amounts in 12- and 3-month-old rats. In all three brain regions the most evident depletion occurred 2 h after treatment. In both groups of rats midbrain histamine levels returned to control values 6 h after treatment; however, hypothalamic histamine depletion was still significant and more evident in the old than in the young animals. Cortical brain histamine also remained significantly depleted in old rats, but returned to control values in young animals 6 h after α-fluoromethylhistidine treatment. These results suggest that old rats show a slower rate of new histamine synthesis in the cortex and hypothalamus. Regional brain histamine depletion was associated with a very significant decrease in plasma corticosterone levels, which indicates that brain histamine–corticosterone interactions do occur.

Changes in the regional brain histamine and histidine levels in postmortem brains of Alzheimer patients

1989 ◽  
Vol 67 (1) ◽  
pp. 75-78 ◽  
Author(s):  
I. M. Mazurkiewicz-Kwilecki ◽  
S. Nsonwah
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Caudate Nucleus ◽  
Brain Regions ◽  
Brain Histamine ◽  
Regional Brain ◽  
Isotope Technique ◽  
Postmortem Brains ◽  
Double Isotope

In postmortem brains of Alzheimer patients, statistically significant decreases in histamine levels were observed in the frontal (45%), temporal (20%), and occipital cortices (38%) and in the caudate nucleus (25%). Histidine levels were decreased in the frontal (15%), temporal (21%), and occipital cortices (30%) and in the caudate nucleus (25%); the decrease was statistically significant in the last two brain regions. Histamine was determined by the double isotope technique, and histidine was determined fluorometrically by a fluorescamine method. The data indicate that brain histamine regulation is altered in Alzheimer's disease.Key words: histamine, histidine, brain, Alzheimer's disease.

scholarly journals Short- and Long-Term Social Recognition Memory Are Differentially Modulated by Neuronal Histamine

Biomolecules ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 555
Author(s):  
Barbara Rani ◽  
Bruna Silva-Marques ◽  
Rob Leurs ◽  
Maria Beatrice Passani ◽  
Patrizio Blandina ◽  
...  
Keyword(s):  
Recognition Memory ◽  
Histamine Release ◽  
Histidine Decarboxylase ◽  
Acetylcholinesterase Inhibitor ◽  
Social Recognition ◽  
Amnesic Effect ◽  
Brain Histamine ◽  
Monogamous Species ◽  
Social Recognition Memory

The ability of recognizing familiar conspecifics is essential for many forms of social interaction including reproduction, establishment of dominance hierarchies, and pair bond formation in monogamous species. Many hormones and neurotransmitters have been suggested to play key roles in social discrimination. Here we demonstrate that disruption or potentiation of histaminergic neurotransmission differentially affects short (STM) and long-term (LTM) social recognition memory. Impairments of LTM, but not STM, were observed in histamine-deprived animals, either chronically (Hdc−/− mice lacking the histamine-synthesizing enzyme histidine decarboxylase) or acutely (mice treated with the HDC irreversible inhibitor α-fluoromethylhistidine). On the contrary, restriction of histamine release induced by stimulation of the H3R agonist (VUF16839) impaired both STM and LTM. H3R agonism-induced amnesic effect was prevented by pre-treatment with donepezil, an acetylcholinesterase inhibitor. The blockade of the H3R with ciproxifan, which in turn augmented histamine release, resulted in a procognitive effect. In keeping with this hypothesis, the procognitive effect of ciproxifan was absent in both Hdc−/− and αFMH-treated mice. Our results suggest that brain histamine is essential for the consolidation of LTM but not STM in the social recognition test. STM impairments observed after H3R stimulation are probably related to their function as heteroreceptors on cholinergic neurons.

Pituitary-adrenal response to bacterial endotoxin in developing rats

1988 ◽  
Vol 255 (4) ◽  
pp. E525-E530 ◽  
Author(s):  
L. Witek-Janusek
Keyword(s):  
Plasma Corticosterone ◽  
Neonatal Rat ◽  
Bacterial Endotoxin ◽  
Plasma Acth ◽  
Adult Rats ◽  
Age Related ◽  
Corticosterone Response ◽  
Adrenal Response ◽  
Old Rats ◽  
Related Pattern

The neonatal rat is very sensitive to the lethal effects of bacterial endotoxin. Because of the adaptive importance of pituitary-adrenal secretions to stress, this study examined the ontogeny of the plasma corticosterone and adrenocorticotropic hormone (ACTH) responses to endotoxin. The lethal sensitivity of young rats to endotoxin ranged from 0.5 to 30 mg/kg (ip) in the 1- to 21-day-old rat. After endotoxin treatment, the 1- and 2-day-old rat showed marked elevations of corticosterone similar in magnitude to that seen in 21-day-old and adult rats; however, significantly depressed corticosterone increments were observed in the 5-, 10-, and 14-day-old rats. This age-related pattern of adrenocortical secretion was correlated with the developing rat's corticosterone response to exogenous ACTH. In contrast, endotoxin administered to 5-, 10-, and 14-day-old rats resulted in increments of plasma ACTH similar to those observed in the 21-day-old and adult rats. Although plasma ACTH levels increased by 84-127% in the 1- and 2-day-old rats, these increases were significantly less than those of rats at all other ages tested. Thus the newborn rat mounts an effective corticosterone response to endotoxin, loses this ability between ages 5-14 days, and regains this response at 21 days of age. Because the hyporesponsive ages exhibit a marked increase in ACTH secretion, the loss of the adrenocortical response to endotoxin appears to be a result of a depressed responsiveness of the adrenal cortex to ACTH.

Treatment of two mastocytosis patients with a histidine decarboxylase inhibitor

1985 ◽  
Vol 16 (3-4) ◽  
pp. 244-248 ◽  
Author(s):  
G. Granerus ◽  
J. H. Olafsson ◽  
G. Roupe
Keyword(s):  
Histidine Decarboxylase ◽  
Decarboxylase Inhibitor

scholarly journals Evaluation of Effect of Ninjin'yoeito on Regional Brain Glucose Metabolism by 18F-FDG Autoradiography With Insulin Loading in Aged Mice

2021 ◽  
Vol 8 ◽  
Author(s):  
Jingmin Zhao ◽  
Ryota Imai ◽  
Naoyuki Ukon ◽  
Saki Shimoyama ◽  
Chengbo Tan ◽  
...  
Keyword(s):  
Glucose Metabolism ◽  
Brain Regions ◽  
Cognitive Outcome ◽  
Brain Diseases ◽  
Control Group ◽  
Brain Glucose ◽  
Brain Glucose Metabolism ◽  
Aged Mice ◽  
Regional Brain ◽  
Age Related

Introduction: A recent clinical study revealed that Ninjin'yoeito (NYT) may potentially improve cognitive outcome. However, the mechanism by which NYT exerts its effect on elderly patients remains unclear. The aim of this study is to evaluate the effect of Ninjin'yoeito on regional brain glucose metabolism by 18F-FDG autoradiography with insulin loading in aged wild-type mice.Materials and Methods: After 12 weeks of feeding NYT, mice were assigned to the control and insulin-loaded groups and received an intraperitoneal injection of human insulin (2 U/kg body weight) 30 min prior to 18F-FDG injection. Ninety minutes after the injection, brain autoradiography was performed.Results: After insulin loading, the 18F-FDG accumulation showed negative changes in the cortex, striatum, thalamus, and hippocampus in the control group, whereas positive changes were observed in the NYT-treated group.Conclusions: Ninjin'yoeito may potentially reduce insulin resistance in the brain regions in aged mice, thereby preventing age-related brain diseases.

scholarly journals Anatomical, Physiological, and Pharmacological Characteristics of Histidine Decarboxylase Knock-Out Mice: Evidence for the Role of Brain Histamine in Behavioral and Sleep–Wake Control

2002 ◽  
Vol 22 (17) ◽  
pp. 7695-7711 ◽  
Author(s):  
Régis Parmentier ◽  
Hiroshi Ohtsu ◽  
Zahia Djebbara-Hannas ◽  
Jean-Louis Valatx ◽  
Takehiko Watanabe ◽  
...  
Keyword(s):  
Histidine Decarboxylase ◽  
Brain Histamine ◽  
Knock Out ◽  
Knock Out Mice

Hypothalamic neuronal histamine modulates physiological responses induced by interleukin-1 beta

1995 ◽  
Vol 269 (6) ◽  
pp. R1308-R1313 ◽  
Author(s):  
M. Kang ◽  
H. Yoshimatsu ◽  
S. Chiba ◽  
M. Kurokawa ◽  
R. Ogawa ◽  
...  
Keyword(s):  
Body Temperature ◽  
Intraperitoneal Injection ◽  
Histidine Decarboxylase ◽  
Interleukin 1 ◽  
Suppressive Effect ◽  
Ingestive Behavior ◽  
Interleukin 1 Beta ◽  
Hypothalamic Histamine ◽  
Food And Water Intake ◽  
Neuronal Histamine

Dynamic involvement of hypothalamic histamine in ingestive behavior and thermogenesis induced by interleukin-1 beta (IL-1 beta) was examined in rats. Intraperitoneal injection of 0.12 nmol/rat IL-1 beta decreased food and water intake and elevated body temperature. However, depletion of neuronal histamine induced by intraperitoneal injection of 160 mumol/rat alpha-fluoromethylhistidine, a suicide inhibitor of histidine decarboxylase (HDC), attenuated the suppressive effect of IL-1 beta on food intake, facilitated the suppressive effect on drinking, and enhanced the elevating effect on rectal temperature. Intraperitoneal injection of 0.12 nmol/rat IL-1 beta increased hypothalamic histamine turnover rate. The same dose of IL-1 beta also increased activity of HDC and histamine-N-methyltransferase (HMT). These results suggest that IL-1 beta may stimulate synthesis and release of hypothalamic histamine in presynaptic terminals by activation of HDC and facilitate degradation of extracellular histamine by activation of MHT. These changes in the dynamics of hypothalamic histamine modulate IL-1 beta-induced ingestive behavior and body temperature.

scholarly journals Understanding the genetic determinants of the brain with MOSTest

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Dennis van der Meer ◽  
Oleksandr Frei ◽  
Tobias Kaufmann ◽  
Alexey A. Shadrin ◽  
Anna Devor ◽  
...  
Keyword(s):  
Large Scale ◽  
Association Studies ◽  
Computational Design ◽  
Brain Regions ◽  
Brain Morphology ◽  
Genome Wide Association Studies ◽  
Small Individual ◽  
Significance Threshold ◽  
Regional Brain ◽  
Genome Wide

Abstract Regional brain morphology has a complex genetic architecture, consisting of many common polymorphisms with small individual effects. This has proven challenging for genome-wide association studies (GWAS). Due to the distributed nature of genetic signal across brain regions, multivariate analysis of regional measures may enhance discovery of genetic variants. Current multivariate approaches to GWAS are ill-suited for complex, large-scale data of this kind. Here, we introduce the Multivariate Omnibus Statistical Test (MOSTest), with an efficient computational design enabling rapid and reliable inference, and apply it to 171 regional brain morphology measures from 26,502 UK Biobank participants. At the conventional genome-wide significance threshold of α = 5 × 10−8, MOSTest identifies 347 genomic loci associated with regional brain morphology, more than any previous study, improving upon the discovery of established GWAS approaches more than threefold. Our findings implicate more than 5% of all protein-coding genes and provide evidence for gene sets involved in neuron development and differentiation.

scholarly journals Hematopoietic progenitors and interleukin-3-dependent cell lines synthesize histamine in response to calcium ionophore

Blood ◽  
1996 ◽  
Vol 87 (8) ◽  
pp. 3161-3169 ◽  
Author(s):  
M Dy ◽  
A Arnould ◽  
FM Lemoine ◽  
F Machavoine ◽  
H Ziltener ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Mrna Expression ◽  
Cell Lines ◽  
Histidine Decarboxylase ◽  
Calcium Ionophore ◽  
Ionophore A23187 ◽  
Hematopoietic Progenitors ◽  
Histamine Synthesis ◽  
Histamine Production ◽  
Dependent Cell

The calcium ionophore A23187 promotes histamine synthesis in murine bone marrow cells by increasing the expression of mRNA encoding histidine decarboxylase (HDC), the histamine-forming enzyme. The cells responsible for this biological activity copurify with hematopoietic progenitors in terms of density, light scatter characteristics, and rhodamine retention, similar to interleukin (IL) 3-induced histamine- producing cells. Yet, the effect of calcium ionophore is not mediated by IL-3. The most purified rhodamine-bright bone marrow subset contains 80% cells that respond to calcium ionophore by increased HDC mRNA expression. This high frequency makes the involvement of one particular progenitor subset in histamine synthesis unlikely. The finding that all IL-3-dependent cell lines tested so far exhibit increased histamine production and HDC mRNA expression in response to calcium influx lends further support to this notion. Cell lines requiring other growth factors or proliferating spontaneously lack this ability. Finally, it should be noted that IL-3-dependent cell lines do not produce histamine in response to their growth factor. It might, therefore, be suggested that the pathway transducing the signal for increased histamine synthesis after IL-3 receptor binding in normal hematopoietic progenitors is modified in these cell lines.

Autoregulation of histamine synthesis through H3 receptors in isolated fundic mucosal cells

1993 ◽  
Vol 265 (6) ◽  
pp. G1039-G1044 ◽  
Author(s):  
F. Hollande ◽  
J. P. Bali ◽  
R. Magous
Keyword(s):  
Gastric Mucosa ◽  
Endocrine Cells ◽  
Histidine Decarboxylase ◽  
Receptor Subtypes ◽  
Histamine Synthesis ◽  
H3 Receptors ◽  
Mucosal Cells ◽  
High Concentrations ◽  
The Relationship ◽  
Stimulation Of

Histamine plays an important role in the control of gastric acid secretion by activating H2 receptors located on parietal cells. In gastric mucosa, histamine is stored both in mast cells and in enterochromaffin-like cells, especially in rodents. It has been proposed that histamine may regulate its own synthesis and/or release through receptors pharmacologically distinct from H1- and H2-receptor subtypes. In this article, we studied the regulation by histamine of histidine decarboxylase (HDC) activity (enzyme responsible for the formation of histamine by decarboxylation of L-histidine) in a fraction of isolated rabbit gastric mucosal cells enriched in mucous and endocrine cells. Histamine and (R)-alpha-methylhistamine (H3 receptor agonist) dose dependently inhibited HDC activity with the same potency (mean effective concn: 32.2 +/- 0.7 and 50.5 +/- 3.1 pM, respectively) and efficacy (35 and 36% inhibition, respectively). In contrast, the H2 agonist dimaprit was devoid of effect. The H3 antagonist thioperamide was found to decrease the histamine- or (R)-alpha-methylhistamine-induced inhibition of HDC activity (mean ineffective concn = 28.3 +/- 1.8 and 9.87 +/- 0.8 nM, respectively), whereas H1 (promethazine) and H2 (ranitidine) antagonists were unable to affect HDC activity. Moreover, high concentrations of thioperamide (1-10 microns) increased histamine release from these cells. All these results allowed us to conclude that, in gastric mucosa, histamine downregulates its own synthesis (and perhaps release) through the stimulation of autoreceptors with pharmacological characteristics of H3 receptors. However, the relationship between histamine synthesis and release remains unclear and needs further investigation.

Sign in / Sign up

Export Citation Format

Share Document