Molecular Neuroimaging in Addictive Disorders

2017 ◽  
Author(s):  
Edythe D. London ◽  
Chelsea L. Robertson
Keyword(s):  
Brain Function ◽  
Drugs Of Abuse ◽  
Human Subjects ◽  
Brain Dysfunction ◽  
Acute Effects ◽  
Addictive Disorders ◽  
Fundamental Information ◽  
Nuclear Medicine Procedures ◽  
Drug Abstinence ◽  
Chronic Use

Molecular neuroimaging, using nuclear medicine procedures to evaluate brain function and markers for specific neurochemical systems, has substantially advanced the understanding of brain dysfunction linked to addictive disorders. Neuroimaging studies of human subjects and animal models has provided fundamental information on the neurobiology of vulnerability to addiction as well as the acute effects of drugs of abuse and the sequelae of chronic use, including the persistent states that maintain addiction and lead to relapse in those who initiate drug abstinence. A common theme that has emerged from decades of brain imaging points to frontostriatal dysfunction, which is a therapeutic target.

scholarly journals Interactions of neuroimmune signaling and glutamate plasticity in addiction

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Cassandra D. Gipson ◽  
Scott Rawls ◽  
Michael D. Scofield ◽  
Benjamin M. Siemsen ◽  
Emma O. Bondy ◽  
...  
Keyword(s):  
Substance Use ◽  
Drug Use ◽  
Substance Use Disorders ◽  
Drugs Of Abuse ◽  
Treatment Strategies ◽  
Glutamate Signaling ◽  
Open Questions ◽  
Seeking Behavior ◽  
Glutamate System ◽  
Chronic Use

AbstractChronic use of drugs of abuse affects neuroimmune signaling; however, there are still many open questions regarding the interactions between neuroimmune mechanisms and substance use disorders (SUDs). Further, chronic use of drugs of abuse can induce glutamatergic changes in the brain, but the relationship between the glutamate system and neuroimmune signaling in addiction is not well understood. Therefore, the purpose of this review is to bring into focus the role of neuroimmune signaling and its interactions with the glutamate system following chronic drug use, and how this may guide pharmacotherapeutic treatment strategies for SUDs. In this review, we first describe neuroimmune mechanisms that may be linked to aberrant glutamate signaling in addiction. We focus specifically on the nuclear factor-kappa B (NF-κB) pathway, a potentially important neuroimmune mechanism that may be a key player in driving drug-seeking behavior. We highlight the importance of astroglial-microglial crosstalk, and how this interacts with known glutamatergic dysregulations in addiction. Then, we describe the importance of studying non-neuronal cells with unprecedented precision because understanding structure-function relationships in these cells is critical in understanding their role in addiction neurobiology. Here we propose a working model of neuroimmune-glutamate interactions that underlie drug use motivation, which we argue may aid strategies for small molecule drug development to treat substance use disorders. Together, the synthesis of this review shows that interactions between glutamate and neuroimmune signaling may play an important and understudied role in addiction processes and may be critical in developing more efficacious pharmacotherapies to treat SUDs.

scholarly journals Acute effects of strength and endurance exercise on serum BDNF and IGF-1 levels in older men

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Hamid Arazi ◽  
Parvin Babaei ◽  
Makan Moghimi ◽  
Abbas Asadi
Keyword(s):  
Endurance Exercise ◽  
Brain Function ◽  
Older Men ◽  
Control Group ◽  
Maximal Heart Rate ◽  
Acute Effects ◽  
Control Groups ◽  
Post Exercise ◽  
And Control ◽  
Serum Bdnf

Abstract Background Regarding an important effects of physical exercise on brain function in elders, the aim of this study was to examine the effects of strength and endurance exercise on brain neurobiological factors in older men. Methods Thirty older men volunteered to participate in this study and were randomly assigned to strength, endurance and control groups. The subjects in strength group performed two circuits of resistance exercise (6 exercises with 10 repetition of 65–70% of one repetition maximum), while endurance group performed 30 min running with 65–70% of maximal heart rate. Blood was obtained pre and post-exercise to determine changes in serum BDNF, IGF-1 and platelets. Results After exercise, both the strength and endurance groups showed significant increases in serum BDNF and IGF-1 concentrations and platelets at post-exercise and in comparison to control group (p < 0.05). In addition, no statistically significant differences were detected between the strength and endurance groups at post-exercise. Conclusion Our findings indicate that both the strength and endurance interventions are effective in elevating BDNF, IGF-1, and platelets, without significant differences between them.

scholarly journals Assessment of Cognitive Brain Function in Ecstasy Users and Contributions of Other Drugs of Abuse: Results from an fMRI Study

2007 ◽  
Vol 33 (2) ◽  
pp. 247-258 ◽  
Author(s):  
Gerry Jager ◽  
Maartje M L de Win ◽  
Ingeborg van der Tweel ◽  
Thelma Schilt ◽  
Rene S Kahn ◽  
...  
Keyword(s):  
Brain Function ◽  
Drugs Of Abuse ◽  
Fmri Study

scholarly journals Effect of capsinoids on energy metabolism in human subjects

2009 ◽  
Vol 103 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Jose E. Galgani ◽  
Donna H. Ryan ◽  
Eric Ravussin
Keyword(s):  
Blood Pressure ◽  
Energy Metabolism ◽  
Metabolic Rate ◽  
Human Subjects ◽  
Acute Effect ◽  
Molecular Structures ◽  
Acute Effects ◽  
Axillary Temperature ◽  
Double Blind ◽  
Different Doses

Capsinoids are non-pungent compounds with molecular structures similar to capsaicin, which has accepted thermogenic properties. To assess the acute effect of a plant-derived preparation of capsinoids on energy metabolism, we determined RMR and non-protein respiratory quotient (NPRQ) after ingestion of different doses of the capsinoids. Thirteen healthy subjects received four doses of the capsinoids (1, 3, 6 and 12 mg) and placebo using a crossover, randomised, double-blind trial. After a 10 h overnight fast as inpatients, RMR was measured by indirect calorimetry for 45 min before and 120 min after ingesting capsinoids or placebo. Blood pressure and axillary temperature were measured before ( − 55 and − 5 min) and after (60 and 120 min) dosing. Before dosing, mean RMR was 6247 (se92) kJ/d and NPRQ was 0·86 (se0·01). At 120 min after dosing, metabolic rate and NPRQ remained similar across the four capsinoids and placebo doses. Capsinoids also had no influence on blood pressure or axillary temperature. Capsinoids provided in four doses did not affect metabolic rate and fuel partitioning in human subjects when measured 2 h after exposure. Longer exposure and higher capsinoids doses may be required to cause meaningful acute effects on energy metabolism.

scholarly journals Acute effects of mustard, horseradish, black pepper and ginger on energy expenditure, appetite,ad libitumenergy intake and energy balance in human subjects

2012 ◽  
Vol 109 (3) ◽  
pp. 556-563 ◽  
Author(s):  
N. T. Gregersen ◽  
A. Belza ◽  
M. G. Jensen ◽  
C. Ritz ◽  
C. Bitz ◽  
...  
Keyword(s):  
Energy Balance ◽  
Treatment Effects ◽  
Human Subjects ◽  
Statistical Significance ◽  
Black Pepper ◽  
Normal Weight ◽  
Acute Effects ◽  
Significant Treatment ◽  
Ad Libitum ◽  
Few Data

Chilli peppers have been shown to enhance diet-induced thermogenesis (DIT) and reduce energy intake (EI) in some studies, but there are few data on other pungent spices. The primary aim of the present study was to test the acute effects of black pepper (pepper), ginger, horseradish and mustard in a meal on 4 h postprandial DIT. The secondary aim was to examine the effects on subjective appetite measures,ad libitumEI and energy balance. In a five-way placebo-controlled, single-blind, cross-over trial, twenty-two young (age 24·9 (sd4·6) years), normal-weight (BMI 21·8 (sd2·1) kg/m2) males were randomly assigned to receive a brunch meal with either pepper (1·3 g), ginger (20 g), horseradish (8·3 g), mustard (21 g) or no spices (placebo). The amounts of spices were chosen from pre-testing to make the meal spicy but palatable. No significant treatment effects were observed on DIT, but mustard produced DIT, which tended to be larger than that of placebo (14 %, 59 (se3)v.52 (se2) kJ/h, respectively,P= 0·08). No other spice induced thermogenic effects approaching statistical significance. Subjective measures of appetite (P>0·85),ad libitumEI (P= 0·63) and energy balance (P= 0·67) also did not differ between the treatments. Finally, horseradish decreased heart rate (P= 0·048) and increased diastolic blood pressure (P= 0·049) compared with placebo. In conclusion, no reliable treatment effects on appetite, EI or energy balance were observed, although mustard tended to be thermogenic at this dose. Further studies should explore the possible strength and mechanisms of the potential thermogenic effect of mustard actives, and potential enhancement by, for example, combinations with other food components.

Neuroendocrinology of Stress and Addiction

2021 ◽  
Author(s):  
Steven Kinsey ◽  
Olivia Vanegas ◽  
Kristen Trexler ◽  
Floyd Steele ◽  
Matthew Eckard
Keyword(s):  
Stress Response ◽  
Psychotropic Drugs ◽  
Drug Exposure ◽  
Drugs Of Abuse ◽  
Drug Withdrawal ◽  
Host Organism ◽  
Repeated Use ◽  
Drug Abstinence ◽  
Withdrawal Syndromes ◽  
Development Of Tolerance

The stress response evolved as a series of neural and endocrine mechanisms that protect the host organism from threats to homeostasis. Repeated use of psychotropic drugs can lead to the development of tolerance (i.e., decreased drug activity at a given dose) and drug dependence, as indicated by withdrawal syndromes following drug abstinence. Drug withdrawal is often overtly stressful, although acute drug exposure may also represent a threat to homeostasis. This article explores the neuroendocrine effects of drugs of abuse and some of the ways in which stress and appetitive mechanisms interact.

Dissociative Anesthetics: Angel Dust to Special K to Ketamine Clinics

2020 ◽  
Author(s):  
Jerrold Winter
Keyword(s):  
Cardiac Rhythm ◽  
Drugs Of Abuse ◽  
Breast Biopsy ◽  
Human Subjects ◽  
Anesthetic Agents ◽  
Dilation And Curettage ◽  
Trade Name ◽  
Dissociative Anesthetics

We will consider just two drugs in this chapter. They are phencyclidine and ketamine. Both are widely used as anesthetic agents, ketamine in humans and phencyclidine in animals. The acronym for phencyclidine that we will use, PCP, comes from its chemical name 1-(1-PhenylCyclohexyl)-Piperidine. In addition to their medical use, both ketamine and PCP have gained roles as recreational drugs or, as others would put it, drugs of abuse. While sharing some of the properties of the depressant drugs we met in the preceding chapter, PCP and ketamine are pharmacologically and ther­apeutically unique. On March 26, 1956, V. Harold Maddox, a chemist working at the research laboratories of Parke, Davis & Company in Detroit, synthesized a novel compound later to be called phencyclidine. PCP was submitted in the autumn of that year for testing in animals. Pigeons, mice, rats, Guinea pigs, rabbits, dogs, cats, and monkeys all had their turn. Depending on the dose employed and the species in which it was tested, the effects ranged from excitement and stimulation to taming and quieting. Analgesia, that is, absence of pain without loss of consciousness, and anesthesia were common but, unlike the depressant drugs we met in the previous chapter, the anesthesia was not accompanied by depression of breathing. Studies in human subjects began in May 1957 at the Department of Anesthesiology of the Detroit Receiving Hospital. By this time, PCP had been given the trade name Sernyl. The drug initially was administered to seven volunteers. As had previously been noted in animals, there was no suppression of breathing or disturbance of cardiac rhythm, highly desirable qualities in an anesthetic agent. The investigators then moved on to 64 patients ranging in age from 18 to 78, 47 of whom were women, who were to undergo various surgical procedures, including breast biopsy, dilation and curettage, skin grafts, hysterectomy, and hernia repair. Immediately after the intravenous administration of PCP, there was what the anesthesiologists called “a profound state of analgesia” permitting surgical incision and, in many cases, completion of the operation without the use of other drugs.

scholarly journals Comparative Analysis of the Permutation and Multiscale Entropies for Quantification of the Brain Signal Variability in Naturalistic Scenarios

2020 ◽  
Vol 10 (8) ◽  
pp. 527
Author(s):  
Soheil Keshmiri
Keyword(s):  
Brain Function ◽  
Human Subjects ◽  
Multiscale Entropy ◽  
Permutation Entropy ◽  
Affective States ◽  
Affective Stimuli ◽  
Eeg Recordings ◽  
The One ◽  
The Brain ◽  
Signal Variability

As alternative entropy estimators, multiscale entropy (MSE) and permutation entropy (PE) are utilized for quantification of the brain function and its signal variability. In this context, their applications are primarily focused on two specific domains: (1) the effect of brain pathology on its function (2) the study of altered states of consciousness. As a result, there is a paucity of research on applicability of these measures in more naturalistic scenarios. In addition, the utility of these measures for quantification of the brain function and with respect to its signal entropy is not well studied. These shortcomings limit the interpretability of the measures when used for quantification of the brain signal entropy. The present study addresses these limitations by comparing MSE and PE with entropy of human subjects’ EEG recordings, who watched short movie clips with negative, neutral, and positive content. The contribution of the present study is threefold. First, it identifies a significant anti-correlation between MSE and entropy. In this regard, it also verifies that such an anti-correlation is stronger in the case of negative rather than positive or neutral affects. Second, it finds that MSE significantly differentiates between these three affective states. Third, it observes that the use of PE does not warrant such significant differences. These results highlight the level of association between brain’s entropy in response to affective stimuli on the one hand and its quantification in terms of MSE and PE on the other hand. This, in turn, allows for more informed conclusions on the utility of MSE and PE for the study and analysis of the brain signal variability in naturalistic scenarios.

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