neurological health and pathophysiology - restorative medicine · neurological health and...
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Neurological Health and Pathophysiology
Kevin Spelman, PhD, MCPP
Health, Education & Research in Botanical Medicine
Ashland, OR
Financial Disclosure
• Consultant for Restorative Formulations
• I have been a Natural Products and Cannabis Industry Consultant, for GMPs, Regulatory Issues, Pharmacology, Research Initiatives, New Product Development and Formulation
• I have financial interests in the Natural Products Industry
Introduction
Other Targets
DepressionAnxiety
Endocannabinoid System
Care & Feeding of the CNS
Mind Map of Lecture
Health Disease
Optimal Wellness
Functional
Disturbance
Energetic
Disturbance
Biochem
Disturb.
Histological
DiseaseAllostasis/Resilience
Subclinical Clinical
Acute
Defensive
Reaction
Phase
Detoxification
Phase
Compen
sation
Phase
Decompen
sation
Phase
Degeneration
Phase
Autoimmune
Neoplastic
Phase
Health as a Continuum The Wall
+++ Background Mood ++ + - - - Background Mood - - -
+++ Perception ++ + - - - Perception - - -
Informational flow dynamicscatecholamines, corticoids, NTs, peptides
gut, endocrine, immune
Informational flow disruption → → →
4Spelman K. 2004. Allostasis: stability through change. Australian J Medical Herbalism 16(4):99-109
Comorbidity and shared pathways to illness
Depression is highly comorbid with:
• heart disease
• type 2 diabetes
• obesity
• metabolic syndrome
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Is the Model Working?
1949 - A Nobel Prize in Medicine was given to Egas Moniz for inventing the frontal lobotomy
Today - A 20 y/o who goes on disability for mental illness will collect over $1,000,000 in 40 yr
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Is the Model Working
Children on SSI that were disabled due to mental illness
• 1987: 5.5% of total on SSI
• 2007: 50% of total on SSI
Social Security Administration reports 1987 - 2007
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Leading cause of global disability
“It is both compelling and
daunting to consider that
dietary intervention at an
individual or population level
could reduce rates of
psychiatric disorders.”
AJP 2010
CVD
Stroke
Obesity
Type 2 Diabetes
Metabolic Syndrome
Some cancers
Dementia/Depression/Anxiety
Etiology Includes Food In:
+ ≠
The Power of Phytochemistry
• People whose diets were highest in whole foods were the least likely to develop signs of depression by the end of 5 yr(Akbaraly et al. 2009)
• Risk of depression/anxiety disorders is 34% lower among women who ate a Traditional diet (Jacka et al, 2010)
“Traditional” Diet – Dominated by vegetables, fruit, beef, lamb, fish, and whole-grain foods
Akbaraly TN, Brunner EJ, Ferrie JE, Marmot MG, Kivimaki M, Singh-Manoux A. Dietary pattern and depressive
symptoms in middle age. Br J Psychiatry. 2009 Nov;195(5):408-13.
Jacka FN, Pasco JA, Mykletun A, Williams LJ, Hodge AM, O’Reilly SL, Nicholson GC, Kotowicz MA, Berk M.
Association of Western and traditional diets with depression and anxiety in women. Am J Psychiatry. 2010
Mar;167(3):305-11. Epub 2010 Jan 4.
AN ABBREVIATED CARE AND FEEDING OF THE CENTRAL NERVOUS SYSTEM
This topic often skipped by Medical Schools
Discussion of optimum molecular concentrations, rates of reactions
…local cerebral deficiencies may lead to mental disease…
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Epinephrine (adrenalin)
Adrenochrome
Whole Foods Diet
This can’t be stressed enough!
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Researchers found that happiness and mental health rise in an
approximately dose-dependent response with the number of daily portions
of fruit and vegetables…“well-being peaks at approximately 7 portions per
day,”
“Our findings are consistent with the need for high levels of fruit-and-
vegetable consumption for mental health and not merely for physical
health.”
0
10
20
30
40
50
60
70
80
Q1 Q2 Q3 Q4 Q5
Survival Percentages
Fruits Vegetables
Gut-Brain Axis
• 35% of biopsy-proven CD cases have a history of psychiatric illness
• − Patients with schizophrenia are at least three times more likely to have CD (meaning 3% of schizophrenia patients) and, if the same pattern follows, three times more likely to have GS (18% of patients).
• − Odds are 33:1 that a patient with CD is unaware he/she has it.
• − Nearly half of patients with CD will not manifest it yet may how psychiatric symptoms from it.
• − Psychiatric manifestations will vary widely amongst CD patients.
• − A gluten-free (GF) diet of CD and GS patients could eliminate or dramatically reduce psychiatric symptoms.
Stradford D. The Role of Allergies, Poisons, and Toxins in Psychiatry in Complementary and Alternative
Medicine Treatments in Psychiatry. Stradford, Vicar, Berger, Cass 2012. Flying Publisher.
A Profound Adaptation…
We steep our genes daily in our dietary broth…
IMPORTANT NUTRIENTS
• Niacin (B3)
• Vitamin B6
• Folate (Vitamin B9)
• Vitamin B12
• SAM-e
• Omega 3s
• Vitamin D
• Zinc
• Calcium and Magnesium
Experimental evidence
Germ free mice (no commensal bacteria)• exaggerated HPA response to stress
• elevated stress hormones
• altered levels of BDNF in hippocampus
• altered levels of serotonin, noradrenaline
• increased permeability of the BBB
Human studies
• probiotics ameliorated psychological distress and reduce cortisol in healthy volunteers (Messaoudi et al.2011)
• probiotics improved psychological symptoms in patients with chronic fatigue syndrome (Rao et al.2009)
• fermented milk products with probiotics modulate brain activity in humans (Tillisch et al. 2013)
Lets Talk about Stress…
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CRH
ACTH
corticoids
Bunney WE, Fawcett JA, Davis JM, Gifford S. 1969. Further evaluation of urinary 17-hydroxycorticosteroids in suicidal patients. Arch Gen Psychiatry. 21(2):138-50 36
26 % of the observers also experienced increases in cortisol levels, even though they were not directly exposed to stress
for observers who were watching loved ones go through the stressful tasks -- 40 percent experienced increased cortisol levels -- but lower for those watching a
stranger -- 10 percent.
the cortisol levels were still raised in 24 percent of observers when they watched through the video feed. This finding suggests that things like watching stressful
moments on TV might be enough to raise cortisol levels 37
The Stress Axis
Hypothalamus (−)
CRF
Pituitary (−)
ACTH
Adrenals cortisol
Higher Brain CentersPerception
IMPORTANT ACTIVITIES FOR THE CNS
• Play
• Exercise
• Breathing techniques
• Mindfulness practice
• Meditation
• Yoga
Attitude!!!!!Stress Buffers
The Brain: Predictive vs Sensory Analysis
• Our brains are selected to predict what is coming• Much of the information we use to predict our emotional states comes from
our viscera
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Danziger et al. Extraneous factors in judicial decisions. PNAS. USA 2011 108 (17) 6889-6892
Mental illnesses are often not single diseases, but heterogenous syndromes
Physiology and Pathophysiology is not simple, nor is diagnosis
But ICD-10 codes are…
Depression
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• Challenge serotonin hypothesis of depression – see anatomy of an epidemic
Age-standardized* percentage of adults meeting criteria for current depression
https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5938a2.htm 45
Prevalence of current depression* among adults aged ≥20 years
http://www.cdc.gov/mmwr/preview/mmwrhtml/su6003a1.htm
47NCHS, National Health and Nutrition Examination Survey, 2013–2016
Percentage of persons aged 20 and over with depression, by family income level
https://www.nimh.nih.gov/health/statistics/major-depression.shtml
https://www.nimh.nih.gov/health/statistics/major-depression.shtml
Major Depressive Disorder (MDD) Pathology:
• monoamine impairment (dysfunction in expression and receptor activity)
• lowering of monoamine production• secondary messenger system malfunction• cortisol excess:
• impeding neurogenesis via reducing brain-derived neurotrophic factor
• impaired endogenous opioid function• changes in GABAergic and/or glutamatergic
transmission• cytokine or steroidal alterations• abnormal circadian rhythm
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Sarris J, Panossian A. Schweitzer I, Stough C, Scholey A. Herbal medicine for depression, anxiety and insomnia: A review of psychopharmacology and clinical evidence. Eur Neuropsychopharmacol. 2011 Dec;21(12):841-60
video
video
Major Depressive Disorder (MDD)
Many herbal medicines may have a multitude of biological effects on reuptake and receptor binding in addition to “endocrine and psychoneuroimmunological modulation”
• Inhibition of monoamine re-uptake
• Enhanced binding and sensitization of serotonin receptors
• Monoamine oxidase inhibition
• Neuroendocrine modulation
• GABAergic effects
• Cytokine modulation
• Opioid and cannabinoid system effects
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Sarris J, Panossian A. Schweitzer I, Stough C, Scholey A. Herbal medicine for depression, anxiety and insomnia: A review of psychopharmacology and clinical evidence. Eur Neuropsychopharmacol. 2011 Dec;21(12):841-60
Serotonin?
“We propose that depressed states are high serotonin phenomena, which challenges the prominent role the low serotonin hypothesis
continues to have in depression research (Albert et al., 2012). We also propose that the direct serotonin-enhancing effects of antidepressants
disturb energy homeostasis and worsen symptoms. We argue that symptom reduction, which only occurs over chronic treatment, is
attributable to the compensatory responses of the brain attempting to restore energy homeostasis.”
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Anxiety
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Mother’s Little Helper 63
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Valium
• Brought to Market in 1963
• 1968 – 1981 best selling drug in Western World
• 1970s: 2 million people addicted, 4 x that of heroin in the 1970s
• After BDZs hit market • 1,028/ → 3,182/100,000 patient-care episodes
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Valium
• 2014• 2.6 % of population 18 to 35 y/o used a BDZ
• 8.7 % 65 to 80
• Of 65 to 80 y/o, 31.4 % received prescriptions for long-term use
• In all age groups, women were about twice as likely as men to receive benzodiazepines
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MOAs Sedatives & Anxiolytics
Simplistically
• Induction of neuronal depression
• Inhibition of neuronal excitation
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GABAA vs GABAB
Ionotropic vs Metabotropic
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GABA
Several binding sites
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GABA
• Reuptake inhibition (tiagabine)
• Increase of release (gabapentin)
• Enzymes• Synthesis - Glutamate decarboxylase (GAD 67)
• Breakdown - GABA transaminase
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Anxiety
Herbal MOIs
• Inducing ionic channel transmission by blockage of voltage gates
• Blockage of GABA transaminase through alteration of membrane structures (Melissa officinalis)
• Blockage of glutamic acid decarboxylase inhibition through alteration of membrane structures (Matricaria recutita, Humuluslupulus)
• Binding with benzodiazepine receptor sites, leading to increased GABA production
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Sarris J, Panossian A. Schweitzer I, Stough C, Scholey A. Herbal medicine for depression, anxiety and insomnia: A review of psychopharmacology and clinical evidence. Eur Neuropsychopharmacol. 2011 Dec;21(12):841-60
GABA, Indirect Activity
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September 2013, Volume 16, Issue 3, pp 363–369
Other Targets
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Chaperones in Neurological Diseases
CytokinesSickness Behavior
Sickness Behavior
Defined as anxiety, anhedonia, social withdrawal, fatigue, and sleep disturbances
Sickness Behavior
Proinflammatory mediators have been shown to induce anxiety, anhedonia, social withdrawal, fatigue, and sleep disturbances, defined
as “sickness behavior”
Dantzer, R., et al. Maletic, V., and Raison, C. L. (2009). Inflammation and its discontents: the role of cytokines in the pathophysiology of major depression. Biol. Psychiatry 65, 732–741.Johnson, R. W., and Kelley, K. W. (2008). From inflammation to sickness and depression: when the immune system subjugates the brain. Nat. Rev. Neurosci. 9, 46–56. Miller, A. H., et al. (2009). Inflammation and its discontents: the role of cytokines in the pathophysiology of major depression. Biol. Psychiatry 65, 732–741
Sickness Behavior
Systemic administration of proinflammatory agents is able to promote the activation of microglial cells in the hippocampus and stimulate the
release of proinflammatory cytokines in the CNS
van Dam, A. M., et al. (1992). Appearance of interleukin-1 in macrophages and in ramified microglia in the brain of endotoxin-treated rats: a pathway for the induction of nonspecific symptoms of sickness? Brain Res. 588, 291–296.Breder, C. D., et al. (1994). Regional induction of tumor necrosis factor alpha expression in the mouse brain after systemic lipopolysaccharide administration. Proc. Natl. Acad. Sci. U.S.A. 91, 11393–11397.Riazi, K., Galic, M. A., Kuzmiski, J. B., Ho, W., Sharkey, K. A., and Pittman, Q. J. (2008). Microglial activation and TNFalpha production mediate altered CNS excitability following peripheral inflammation. Proc. Natl. Acad. Sci. U.S.A. 105, 17151–17156.
Sickness Behavior
Activation of microglial cells in the hippocampus and the subsequent release of proinflammatory cytokines in the CNS is associated with
depression and anxiety
Reichenberg, A., et al. (2001). Cytokine-associated emotional and cognitive disturbances in humans. Arch. Gen. Psychiatry 58, 445–452.Miller, A. H., et al. (2009). Inflammation and its discontents: the role of cytokines in the pathophysiology of major depression. Biol. Psychiatry 65, 732–741.
Sickness Behavior
Central administration of IL-1β & TNF-α cytokines induces sickness behavior in animals
Dantzer, R., et al. Maletic, V., and Raison, C. L. (2009). Inflammation and its discontents: the role of cytokines in the pathophysiology of major depression. Biol. Psychiatry 65, 732–741.Haji, N., Mandolesi, G., Gentile, A., Sacchetti, L., Fresegna, D., Rossi, S., et al. (2012). TNF-α-mediated anxiety in a mouse model of multiple sclerosis. Exp. Neurol. 237, 296–303. Rossi, S., Sacchetti, L., Napolitano, F., De Chiara, V., Motta, C., Studer, V., et al. (2012). Interleukin-1β causes anxiety by interacting with the endocannabinoid system. J. Neurosci. 32, 13896–13905.
Sickness Behavior
Inflammation appears to be part of the etiology in the pathophysiology of different psychiatric syndromes, including major depression
Maes, M., et al. (1995). Increased plasma concentrations of interleukin-6, soluble interleukin-6, soluble interleukin-2 and transferrin receptor in major depression. J. Affect. Disord. 34, 301–309.Capuron, L., et al. (2002). Treatment of cytokine-induced depression. Brain Behav. Immun. 16, 575–580.
Sickness Behavior
Elevated biomarkers of systemic inflammation, as C-reactive protein, have been associated with depressive symptoms
Morris, A. A., Zhao, L., Ahmed, Y., Stoyanova, N., De Staercke, C., Hooper, W. C., et al. (2011). Association between depression and inflammation–differences by race and sex: The META-Health Study. Psychosom. Med. 73, 462–468
Sickness Behavior
Depressed patients show higher peripheral blood levels of proinflammatory cytokines
Dowlati, Y., Herrmann, N., Swardfager, W., Liu, H., Sham, L., Reim, E. K., et al. (2010). A meta-analysis of cytokines in major depression. Biol. Psichiatry 67, 446–457.Haapakoski, R., Mathieu, J., Ebmeier, K. P., Alenius, H., and Kivimäki, M. (2015). Cumulative meta-analysis of interleukins 6 and 1β, tumour necrosis factor α and C-reactive protein in patients with major depressive disorder. Brain Behav. Immun. 49, 206–215.Zorrilla, E. P., et al. (2001). The relationship of depression and stressors to immunological assays: a meta-analytic review. Brain Behav. Immun. 15, 199–226.
Sickness Behavior
Elevated inflammatory markers predict reduced response to antidepressant treatment
Strawbridge, R., Arnone, D., Danese, A., Papadopoulos, A., Herane Vives, A., and Cleare, A. J. (2015). Inflammation and clinical response to treatment in depression: a meta-analysis. Eur. Neuropsychopharmacol. 25, 1532–1543.
Sickness Behavior
Increased prevalence of depression has been observed in patients with autoimmune disorders
Blocking cytokine signaling can exert beneficial effects on mood
Zeher, H., et al. (2010). Coping with depression and anxiety in patients with psoriasis. Egypt. J. Psychiatry 31, 57–63.Tyring, S., et al. (2006). Etanercept and clinical outcomes, fatigue, and depression in psoriasis: double-blind placebo-controlled randomized phase III trial. Lancet 367, 29–35.
Sickness Behavior
Post-mortem studies in patients with major depression evidenced that also the innate immune response is altered, possibly contributing to
the pathogenesis of depression
Martín-Hernández, D., Caso, J. R., Meana, J. J., Callado, L. F., Madrigal, J. L. M., García-Bueno, B., et al. (2018). Intracellular inflammatory and antioxidant pathways in postmortem frontal cortex of subjects with major depression: effect of antidepressants. J. Neuroinflammation 15, 251.
Hypothesis
The efficacy of different psychoactive treatments may be mediated by immunomodulatory properties
Maes, M., et al. (1999). Negative immunoregulatory effects of antidepressants: inhibition of interferongamma and stimulation of interleukin-10 secretion. Neuropsychopharmacology 20, 370–379. Cattaneo, A., et al. (2013). Candidate genes expression profile associated with antidepressants response in the GENDEP study: differentiating between baseline ‘predictors’ and longitudinal ‘targets’. Neuropsychopharmacology 38, 377–385.Horowitz, M. A., et al. (2015). Antidepressant compounds can be both pro- and antiinflammatory in human hippocampal cells. Int. J. Neuropsychopharmacol. 18, 3.
PerspectivesWhat is the primary substrate of the universe?
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The Beginning
Matter → Consciousness
The Beginning
Matter Consciousness
The Endocannabinoid SystemThis is not necessarily about Cannabis but about basic physiology
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Endocannabinoid Basics
• CB1 and CB2 receptors found throughout the body
• Anandamide (AEA) and 2-AG synthesized on-demand for homeostatic functions
• Enzymes to synthesize AEA & 2-AG
• Enzymes to metabolize AEA & 2-AG
CB1 Receptor Distribution in Human Brain
with the distribution of CB1 receptors (17), which de-
creased slowly over time. Radioactivity in the brain peaked
by approximately 30 min and was approximately 3.2 SUV
for all areas of the neocortex (Figs. 2 and 3A). Areas with
high CB1 receptor density (e.g., putamen) had an even
greater concentration of radioactivity, peaking over 4.0
SUV in most subjects. Radioactivity in the brain decreased
slowly, remaining within approximately 85% of thepeak by
2 h and within approximately 60% of the peak by 5 h. We
averaged radioactivity concentration from 20 to 60 min
after injection to represent brain uptake (brain uptake20–60;
Supplemental Table 3).
Two regions of the brain consistently demonstrated less
uptake of radioactivity than other regions. The first region,
pons, had a peak SUV of approximately 2.4 within 8 min.
After the peak, washout of radioactivity from the pons was
1.5–2 times faster than from other regions at 60–120 min
after injection. The second region, white matter, typical ly
peaked at an SUV of approximately 1.2 about 15 min after
injection and remained nearly constant until the end of the
scan, with minimal washout of radioactivity.
The skull had a significant uptake of radioactivity, which
could reflect bone or marrow (Fig. 3B). Among regions of
the skull, the clivus, which contains significant amounts of
marrow, had thegreatest uptake of radioactivity, suggesting
that marrow more avidly takes up 18F-FMPEP-d2 or its
radiometabolites.
Plasma Analysis
The concentration of 18F-FMPEP-d2 in arterial plasma
peaked at 1–2 min and then rapidly declined because of
distribution in the body, followed by a slow terminal phase
of elimination. To quantify theexposure of thebrain to 18F-
FMPEP-d2, we fitted the concentration of 18F-FMPEP-d2after its peak to a triexponential curve (Fig. 4A). Of the 3
associated half-lives, the first 2 (; 0.4 and 5.7 min) largely
reflected distribution and the last (; 82 min) reflected
elimination (i.e., metabolism and excretion). However,
the 3 components accounted for nearly equal portions of
the total AUC0-N : approximately 18%, 28%, and 33%. The
portion before the peak accounted for approximately 20%
of the AUC0-N . The concentration of18F-FMPEP-d2 in the
plasma of some subjects remained the same or slightly
increased during the2 later imaging intervals (150–180 and
210–240 min) but declined during the rest intervals (120–
150, 180–210, and 240–270min). During the rest intervals,
subjects arose from the camera and walked around,
suggesting that the shifting of fluid in the body may have
mobil ized and redistributed 18F-FMPEP-d2.
FIGURE 2. 18F-FMPEP-d2 in human brain. PET images
from 30 to 60 min after injection of 18F-FMPEP-d2 were
averaged (left column) and coregistered to subject’s MR
images (middle column). PET and MR images are overlaid in
right column.
FIGURE 3. Time–activity curves of 18F-FMPEP-d2 in brain
from single subject scanned for 300 min. (A) Decay-
corrected measurements from putamen (n), prefrontal cortex
(h ), cerebellum (d , pons (s ), and white matter (· ) were fitted
with unconstrained 2-tissue-compartment model (–). Puta-
men was consistently region of highest brain uptake. White
matter was consistently region of lowest brain uptake,
followed by pons. (B) Decay-corrected measurements from
same subject demonstrate uptake of radioactivity in clivus
(¤ ), occiput () ), and parietal bones (: ). Concentration
(Conc) is expressed as SUV, which normalizes for injected
activity and body weight.
IMAGING CB1 RECEPTORS USING18F-FMPEP-d2 • Terry et al. 115
by on July 5, 2014. For personal use only. jnm.snmjournals.org Downloaded from
Terry et al. Imaging and Quantitation of Cannabinoid CB1 Receptors in Human and Monkey Brains Using18F-Labeled Inverse Agonist Radioligands. J Nucl Med 2010;51(1):112-120
CB2 Receptor Distribution
Ahmed et al. Whole-body biodistribution and radiation dosimetry of the cannabinoid type 2 receptor ligand
[11C]-NE40 in healthy subjects.Mol Imaging Biol. 2013 Aug;15(4):384-90.
Anandamide (AEA)Devane, Mechoulam et al., 1992
Endogenous Cannabinoid Ligands: The Endocannabinoids
2-arachidonoylglycerol (2-AG)Mechoulam et al., 1995Sugiura et al., 1995
Anandamide (AEA) and 2-arachidonoylglycerol (2-AG):
• Retrograde messengers in nervous system.
• Autocrine or paracrine mediators elsewhere.
• Synthesized “on demand” from cell membrane precursors (arachidonic acid derivatives) and immediately released.
• Degraded by enzymatic hydrolysis
• AEA -> fatty acid amide hydrolase (FAAH)
• 2-AG -> monoacylglycerol lipase (MAGL)
(McPArtland, 2008)
Endogenous Cannabinoid Ligands: The Endocannabinoids
Numerous Other Endogenous Cannabinoids
(Kogan 2006)
Other Endocannabinoid Targets
• GPR55 (Ryberg, 2007; Staton, 2008)
• TRPV1 “capsaicin receptor” (Ross, 2003)
• PPARs: Peroxisome proliferator-activated receptors (O'sullivan, 2007)
• Voltage-gated ion channels
• Ca2+, Na+, and various types of K+ channels
• Ligand-gated ion channels
• 5-HT3 and nicotinic ACh receptors (Oz, 2006)
The Endocannabinoid System Function and Regulates the;
• Nervous System
• Connective Tissues
• Immune System
• Neoplasms
• Embryology
• Digestive System
• Hunger and Feeding
101Ashley NT, Demas GE. Neuroendocrine-immune circuits, phenotypes, and interactions. Horm Behav 87 (2017) 25–34.
Endocannabinoid System
Increasing Resilience
Neuroplastic effects such as synaptic plasticity, neurogenesis and neurotrophin expression in the hippocampus are modulated by
endogenous cannabinoids
Aguado et al. (2005). The endocannabinoid system drives neural progenitor proliferation. FASEB J. 19, 1704–1706.Jiang, W., Zhang, Y., Xiao, L., Van Cleemput, J., Ji, S. P., Bai, G., et al. (2005).Cannabinoids promote embryonic and adult hippocampus neurogenesis and produce anxiolytic- and antidepressant-like effects. J. Clin. Invest. 115:3104–3116.Campos, et al. (2013). The anxiolytic effect of cannabidiol on chronically stressed mice depends on hippocampal neurogenesis: involvement of the endocannabinoid system. Int. J. Neuropsychopharmacol. 16:1407–1419.Zhang, Z., Wang, W., Zhong, P., Liu, S. J., Long, J. Z., Zhao, L., et al. (2015). Blockade of 2-arachidonoylglycerol hydrolysis produces antidepressant-like effects and enhances adult hippocampal neurogenesis and synaptic plasticity. Hippocampus 25:16–26.
Hypothalamus
Scarante et al. 2017. Cannabinoid Modulation of the Stressed Hippocampus. Front Mol Neurosci 10: 411.
Keys to Resilience
A range of human genes and polymorphisms associated with
• Neuropeptide Y
• Noradrenergic systems
• Dopaminergic systems
• Serotonergic systems
• Brain Derived Neurotropic Factor
• Hypothalamus-Pituitary-Adrenal axis
have been linked to resilience
Feder, et al. (2009). Psychobiology and molecular genetics of resilience. Nat.Rev.Neurosci. 10, 446–457.
Russo et al. (2012). Neurobiology of resilience. Nat.Neurosci. 15, 1475–1484.
CRH causes a reduction in the endocannabinoid anandamide within the amygdala
we found that CRH signaling in the amygdala promotes an anxious phenotype that is prevented by FAAH inhibition
CRH signaling coordinates a disruption of tonic AEA activity to promote a state of anxiety
Several lines of evidence suggest that facilitation of cannabinoid signaling within the hippocampus brain region prevents stress-
induced behavioral changes.
there is reduced FAAH expression associated with a FAAH SNP that decreases anxiety-like behaviors
At the End of the Day
The Endocannabinoid System as a fundamental system overlapping with many other key systems alters our perception, the way we move
through the world and our physiological tone
Endocannabinoid System
Gut-Brain Axis
Neuro-Immuno-Endocrine
Cardiovascular System
Physiological Order