Category: 2 AG

Homeostasis: If Not Cannabinoid Receptor Three, then Cannabinoid Receptor Third

6/7/2017

The Cannabis Papers by Publius

In The Cannabis Papers: A citizen’s guide to cannabinoids (2011), we noted evidence for a CB3 receptor in addition to CB1 and CB2. The research suggested that there was more happening (things to be accounted for, scientifically) and another receptor was proposed. In 2017 it looks like the best answer is a third category of activity and not a specific receptor; notably, this third activity involves many other kinds of receptors.

The Guide to Pharmacology website has an introduction page for cannabinoid receptors; at the bottom of the page there is a section on this third activity (non-CB1 and non-CB2 modulation). The site notes it is “generally accepted” that other receptor types, and thus other systems, are modulated by cannabinoids; this is true for endo, plant and pharmaceutical cannabinoids.

This third signaling effect connects progesterone and nuclear receptors to cannabinoids; it also suggests modulating endometriosis is similar to homeostasis: both depend on cannabinoids for healing and health.

*Next Up: Wednesday 21 June and a 2020: Virtual Representation and We the People.

Posted by Bryan W. Brickner

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Homeostasis: Publius’ (Ultralow) THC Political Cannabinoid Science

9/5/2014

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The Cannabis Papers by Publius

The Cannabis Papers: A citizen’s guide to cannabinoids (2011)
By Publius

Welcome Homeostasis!
Burning Man Edition

Today’s science roundup looks at four 2014 articles on how the cannabinoid system (CS) modulates our health through homeostasis. The line-up links to CS PubMed articles discussing: hippocampus inhibition and excitation, pain relief from a Chinese herb (thunder God vine), GABA pain dis-inhibition, and brain protection from a single ultralow dose of tetrahydrocannabinol (THC).

The annual Burning Man festival in Black Rock City (NV) was last week; participants test their CS by enduring two Black Rock extremes ~ art and nature ~ which create space for mind and body to catch a glimpse of … spirit.

I. Hippocampus Homeostasis (Inhibition and Excitation) and the CS (Endos)
“Endocannabinoids (eCBs) modulate both excitatory and inhibitory neurotransmission in hippocampus via activation of pre-synaptic cannabinoid receptors. Here, we present a model for cannabinoid mediated short-term depression of excitation (DSE) based on our recently developed model for the equivalent phenomenon of suppressing inhibition (DSI). … Finally, we explore under which conditions the combination of DSI and DSE can temporarily shift the fine balance between excitation and inhibition. This highlights a mechanism by which eCBs might act in a neuro-protective manner during high neural activity.”
Cannabinoid-mediated short-term plasticity in hippocampus.
Zachariou M, Thul R.
J Comput Neurosci. 2014 Aug 16. [Epub ahead of print]
PMID: 25123173 [PubMed - as supplied by publisher]
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II. Homeostasis (Pain Relief) and CS CB2 Signaling
“Celastrol, a major active ingredient of Chinese herb Tripterygium wilfordii Hook. f. (thunder god vine), has exhibited a broad spectrum of pharmacological activities, including anti-inflammation, anti-cancer and immunosuppression. … Taken together, our results demonstrate the analgesia effects of celastrol through CB2 signaling and propose the potential of exploiting celastrol as a novel candidate for pain relief.”
Celastrol attenuates inflammatory and neuropathic pain mediated by cannabinoid receptor type 2.
Yang L, Li Y, Ren J, Zhu C, Fu J, Lin D, Qiu Y.
Int J Mol Sci. 2014 Aug 6;15(8):13637-48. doi: 10.3390/ijms150813637.
PMID: 25101848 [PubMed - in process] Free Article
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III. Homeostasis (GABA Pain Dis-inhibition) and the CS
“At the cellular level, opioids and cannabinoids are hypothesised to activate descending analgesia through an indirect process of 'GABA disinhibition'-suppression of inhibitory GABAergic inputs onto output neurons which constitute the descending analgesic pathway.”
Descending modulation of pain: the GABA disinhibition hypothesis of analgesia.
Lau BK, Vaughan CW.
Curr Opin Neurobiol. 2014 Jul 24;29C:159-164. doi: 10.1016/j.conb.2014.07.010. [Epub ahead of print] Review.
PMID: 25064178 [PubMed - as supplied by publisher]
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IV. Homeostasis (CS CNS Protection) from a Single Ultralow Dose of THC
“In our previous studies, we found that a single ultralow dose of tetrahydrocannabinol (THC; 0.002 mg/kg, three to four orders of magnitude lower than the conventional doses) protects the brain from different insults that cause cognitive deficits. … Our results suggest that an ultralow dose of THC that lacks any psychotrophic activity protects the brain from neuroinflammation-induced cognitive damage and might be used as an effective drug for the treatment of neuroinflammatory conditions, including neurodegenerative diseases.”
Ultralow doses of cannabinoid drugs protect the mouse brain from inflammation-induced cognitive damage.
Fishbein-Kaminietsky M, Gafni M, Sarne Y.
J Neurosci Res. 2014 Jul 16. doi: 10.1002/jnr.23452. [Epub ahead of print]
PMID: 25042014 [PubMed - as supplied by publisher]
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Video: Cannabinoid Profiles - THC, THCA, THCV, CBD, CBG, CBN, CBC & Terpenes

Once Upon A Time ...

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Homeostatic Cannabinoid Science ~ Publius’ World Cup Edition

7/6/2014

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The Cannabis Papers by Publius (2011)

The Cannabis Papers: A citizen’s guide to cannabinoids (2011)
By Publius

A World (Cup) of Cannabinoids: Fielders Edition

Today’s science roundup looks at ten articles on how the cannabinoid system (CS) modulates our health and homeostasis; the line-up links to 2014 CS PubMed articles: four directly on homeostasis, two on the circulatory system, two on the central nervous system, and one each on our digestive and respiratory systems.

I. CNS (Pediatric Brain Injury) and the CS
“Paediatric traumatic brain injury (TBI) is a leading cause of death and disability. Previous studies showed neuroprotection after TBI by (endo)cannabinoid mechanisms, suggesting involvement of cannabinoid receptors (CBR). … The results may provide explanation for the neuroprotective properties of cannabinoid ligands and future therapeutic strategies of TBI.”
Early increase of cannabinoid receptor density after experimental traumatic brain injury in the newborn piglet.
Donat CK, Fischer F, Walter B, Deuther-Conrad W, Brodhun M, Bauer R, Brust P.
Acta Neurobiol Exp (Wars). 2014;74(2):197-210.
PMID: 24993629 [PubMed - in process]
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II. Digestive System (Irritable Bowel Syndrome) and the CS
“The activation of the ATP ion-gated channels, voltage-gated sodium (Nav) and calcium (Cav) channels, as well as the activation of protease-activated receptors (PAR2), transient receptor potential vanilloide-1, serotonin, cannabinoids and cholecystokinin are involved in the genesis of visceral hypersensitivity in IBS.”
Main ion channels and receptors associated with visceral hypersensitivity in irritable bowel syndrome.
de Carvalho Rocha HA, Dantas BP, Rolim TL, Costa BA, de Medeiros AC.
Ann Gastroenterol. 2014;27(3):200-206. Review.
PMID: 24976114 [PubMed - as supplied by publisher] Free PMC Article
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III. Respiratory System (Paraquat and Acute Lung Injury) and the CS
“Paraquat [PQ], a widely used herbicide, is well known to exhibit oxidative stress and lung injury. … The results suggested that activating CB2 receptor exerted protective activity against PQ-induced ALI [Acute Lung Injury], and it potentially contributed to the suppression of the activation of MAPKs and NF- κ B pathways.”
CB2 Receptor Activation Ameliorates the Proinflammatory Activity in Acute Lung Injury Induced by Paraquat.
Liu Z, Wang Y, Zhao H, Zheng Q, Xiao L, Zhao M.
Biomed Res Int. 2014;2014:971750. doi: 10.1155/2014/971750. Epub 2014 May 22.
PMID: 24963491 [PubMed - in process] Free PMC Article
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IV. Homeostasis (Indole Quinuclidine Analogs) and the CS
“Therefore, indole quinuclidines are a novel structural class of compounds exhibiting high affinity and a range of intrinsic activity at cannabinoid type-1 and type-2 receptors.”
Characterization of the intrinsic activity for a novel class of cannabinoid receptor ligands: Indole quinuclidine analogs.
Franks LN, Ford BM, Madadi NR, Penthala NR, Crooks PA, Prather PL.
Eur J Pharmacol. 2014 Aug 15;737:140-8. doi: 10.1016/j.ejphar.2014.05.007. Epub 2014 May 20.
PMID: 24858620 [PubMed - in process]
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V. Circulatory System (Ischemic Heart Disease) and the CS
“Ischemic heart disease is associated with inflammation, interstitial fibrosis and ventricular dysfunction prior to the development of heart failure. … Therefore, the endocannabinoid-CB2 receptor axis plays a key role in cardioprotection during the initial phase of ischemic cardiomyopathy development.”
The endocannabinoid-CB2 receptor axis protects the ischemic heart at the early stage of cardiomyopathy.
Duerr GD, Heinemann JC, Suchan G, Kolobara E, Wenzel D, Geisen C, Matthey M, Passe-Tietjen K, Mahmud W, Ghanem A, Tiemann K, Alferink J, Burgdorf S, Buchalla R, Zimmer A, Lutz B, Welz A, Fleischmann BK, Dewald O.
Basic Res Cardiol. 2014 Jul;109(4):425. doi: 10.1007/s00395-014-0425-x. Epub 2014 Jul 1.
PMID: 24980781 [PubMed - in process]
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VI. Homeostasis, Endocannabinoid Deficiencies and the CS
“Subsequent research has confirmed that underlying endocannabinoid deficiencies indeed play a role in migraine, fibromyalgia, irritable bowel syndrome and a growing list of other medical conditions. Clinical experience is bearing this out. Further research and especially, clinical trials will further demonstrate the usefulness of medical cannabis. As legal barriers fall and scientific bias fades this will become more apparent.”
Clinical endocannabinoid deficiency (CECD) revisited: Can this concept explain the therapeutic benefits of cannabis in migraine, fibromyalgia, irritable bowel syndrome and other treatment-resistant conditions?
Smith SC, Wagner MS.
Neuro Endocrinol Lett. 2014 Jun 30;35(3):198-201. [Epub ahead of print]
PMID: 24977967 [PubMed - as supplied by publisher]
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VII. Homeostasis (Epilepsy, Neuronal Plasticity) and the CS
“Synaptic communication requires constant adjustments of pre- and postsynaptic efficacies. In addition to synaptic long-term plasticity, the presynaptic machinery underlies homeostatic regulations which prevent out of range transmitter release. In this mini-review we will discuss the relevance of selected presynaptic mechanisms to epilepsy including voltage- and ligand-gated ion channels as well as cannabinoid and adenosine receptor signaling.”
Presynaptic mechanisms of neuronal plasticity and their role in epilepsy.
Meier J, Semtner M, Winkelmann A, Wolfart J.
Front Cell Neurosci. 2014 Jun 17;8:164. doi: 10.3389/fncel.2014.00164. eCollection 2014. Review.
PMID: 24987332 [PubMed]
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VIII. Homeostasis (Turning Agonists into Antagonists) and the CS
“However, we discovered that bivalency has an influence on the effect at both cannabinoid receptors. Moreover, we found out that the spacer length and the attachment position altered the efficacy of the bivalent ligands at the receptors by turning agonists into antagonists and inverse agonists.”
Synthesis and biological evaluation of bivalent cannabinoid receptor ligands based on hCB2R selective benzimidazoles reveal unexpected intrinsic properties.
Nimczick M, Pemp D, Darras FH, Chen X, Heilmann J, Decker M.
Bioorg Med Chem. 2014 Jun 13. pii: S0968-0896(14)00454-4. doi: 10.1016/j.bmc.2014.06.008. [Epub ahead of print]
PMID: 24984935 [PubMed - as supplied by publisher]
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IX. Circulatory System (Blood Vessels-Heart) and the CS
“2-Arachidonoylglycerol [2-AG] plays an important role in the regulation of the circulatory system via direct and/or indirect, through their metabolites, effects on blood vessels and/or heart. Accumulating evidence reveals that 2-AG is involved in the pathogenesis of various shocks and atherosclerosis.”
Role of endocannabinoid 2-arachidonoylglycerol in the physiology and pathophysiology of the cardiovascular system.
Karabowicz P, Grzęda E, Baranowska-Kuczko M, Malinowska B.
Postepy Hig Med Dosw (Online). 2014 Jun 12;68(0):814-27.
PMID: 24934539 [PubMed - in process]
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X. CNS (Brain Mitochondria) and the CS
“Our results show that the use of appropriate controls and quantifications allows detecting mtCB1 receptor with CB1 receptor antibodies, and that, if mitochondrial fractions are enriched and purified, CB1 receptor agonists reliably decrease respiration in brain mitochondria.”
Cannabinoid control of brain bioenergetics: Exploring the subcellular localization of the CB1 receptor.
Hebert-Chatelain E, Reguero L, Puente N, Lutz B, Chaouloff F, Rossignol R, Piazza PV, Benard G, Grandes P, Marsicano G.
Mol Metab. 2014 Apr 2;3(4):495-504. doi: 10.1016/j.molmet.2014.03.007. eCollection 2014 Jul.
PMID: 24944910 [PubMed] Free PMC Article
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See also: Alzheimer’s, Cancer and Homeostatic Cannabinoid Science

Bonus Video: Homeostasis

Posted by Bryan W. Brickner

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Homeostatic Cannabinoid Science ~ Publius’ May Roundup

5/30/2014

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Astrocyte / Blood-Brain Barrier by Ben Brahim Mohammed

The Cannabis Papers: A citizen’s guide to cannabinoids (2011)
By Publius

Here are seven new 2014 findings on how the cannabinoid system (CS) modulates homeostasis and other systems in our bodies: the roundup links to recent PubMed articles on the urinary, neuroendocrine, digestive, central nervous and serotonin systems.

I. Urinary System (Kidney / Diabetes) and CS
“A functionally active endocannabinoid system is present within the kidney. The cannabinoid receptor type 2 (CB2) is expressed by both inflammatory cells and podocytes, and its activation has beneficial effects in experimental diabetic nephropathy. … Thus, CB2 deletion worsens diabetic nephropathy, independent of bone marrow-derived cells.”
Deficiency of cannabinoid receptor of type 2 worsens renal functional and structural abnormalities in streptozotocin-induced diabetic mice.
Barutta F, Grimaldi S, Franco I, Bellini S, Gambino R, Pinach S, Corbelli A, Bruno G, Rastaldi MP, Aveta T, Hirsch E, Di Marzo V, Gruden G.
Kidney Int. 2014 May 14. doi: 10.1038/ki.2014.165. [Epub ahead of print]
PMID: 24827776 [PubMed - as supplied by publisher]
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II. Neuroendocrine System (Skin) and CS
“Recent evidence has shown that the neuroendocrine regulation of human skin biology also extends to keratins, the major structural components of epithelial cells. For example, thyrotropin-releasing hormone, thyrotropin, opioids, prolactin, and cannabinoid receptor 1-ligands profoundly modulate human keratin gene and protein expression in human epidermis and/or hair follicle epithelium in situ.”
Harnessing neuroendocrine controls of keratin expression: A new therapeutic strategy for skin diseases?
Ramot Y, Paus R.
Bioessays. 2014 May 13. doi: 10.1002/bies.201400006. [Epub ahead of print]
PMID: 24823963 [PubMed - as supplied by publisher]
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III. Digestive System and CS
“Palmitoylethanolamide (PEA), a naturally-occurring acylethanolamide chemically related to the endocannabinoid anandamide, interacts with targets that have been identified in peripheral nerves controlling gastrointestinal motility, i.e. cannabinoid (CB1 and CB2 ) receptors, transient receptor potential vanilloid type-1 (TRPV1), and peroxisomal proliferator activated receptor α (PPARα).”
Ultramicronized palmitoylethanolamide normalizes intestinal motility in a murine model of post-inflammatory accelerated transit: involvement of CB1 receptors and TRPV1.
Capasso R, Orlando P, Pagano E, Aveta T, Buono L, Borrelli F, Di Marzo V, Izzo AA.
Br J Pharmacol. 2014 May 12. doi: 10.1111/bph.12759. [Epub ahead of print]
PMID: 24818658 [PubMed - as supplied by publisher]
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IV. Central Nervous System and CS
“G-protein-coupled receptors (GPCRs) constitute an example of proteins that are the key factors in the framework needed to sustain brain and nerve structure and function. The versatility underlying nervous system anatomy takes advantage of a recently discovered feature of GPCRs, the possibility to form heteromers that, placed at specific neuronal subsets and at specific locations (pre-, post-, or peri-synaptic), contribute to attain unique neural functions.”
G-Protein-Coupled Receptor Heteromers as Key Players in the Molecular Architecture of the Central Nervous System.
Brugarolas M, Navarro G, Martínez-Pinilla E, Angelats E, Casadó V, Lanciego JL, Franco R.
CNS Neurosci Ther. 2014 May 9. doi: 10.1111/cns.12277. [Epub ahead of print]
PMID: 24809909 [PubMed - as supplied by publisher]
Related citations

V. Serotonin System and the CS
“Serotonin (5-HT) plays pivotal roles in the pathogenesis of post-infectious irritable bowel syndrome (PI-IBS), and luminal 5-HT time-dependently modulates visceral nociception. We found that duodenal biopsies from PI-IBS patients exhibited increased 5-HT and decreased anandamide levels and that decreased anandamide was associated with abdominal pain severity, indicating a link between 5- HT and endocannabinoid signaling pathways in PI-IBS.”
Vagal anandamide signaling via cannabinoid receptor 1 contributes to luminal 5-HT modulation of visceral nociception in rats.
Feng CC, Yan XJ, Chen X, Wang EM, Liu Q, Zhang LY, Chen J, Fang JY, Chen SL.
Pain. 2014 May 8. pii: S0304-3959(14)00225-5. doi: 10.1016/j.pain.2014.05.005. [Epub ahead of print]
PMID: 24813296 [PubMed - as supplied by publisher]
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VI. Central Nervous System (Blood-Brain Barrier) and CS
“Early brain injury (EBI), following subarachnoid hemorrhage (SAH), comprises blood-brain barrier (BBB) disruption and consequent edema formation. … We suggest that CB2R stimulation attenuates neurological outcome and brain edema, by suppressing leukocyte infiltration into the brain through TGF-β1 up-regulation and E-selectin reduction, resulting in protection of the BBB after SAH.”
Cannabinoid type 2 receptor stimulation attenuates brain edema by reducing cerebral leukocyte infiltration following subarachnoid hemorrhage in rats.
Fujii M, Sherchan P, Krafft PR, Rolland WB, Soejima Y, Zhang JH.
J Neurol Sci. 2014 Apr 30. pii: S0022-510X(14)00270-6. doi: 10.1016/j.jns.2014.04.034. [Epub ahead of print]
PMID: 24819918 [PubMed - as supplied by publisher]
Related citations

VII. Central Nervous System (Memory) and CS
“The reactivation of a memory can result in its destabilization, necessitating a process of memory reconsolidation to maintain its persistence. Here we show that the destabilization of a contextual fear memory is potentiated by the cannabinoid CB1 receptor agonist Arachidonyl-2-chloroethylamide (ACEA). … These results indicate that memory expression and destabilization, while being independent from one another, are both dependent upon memory reactivation. Moreover, memory destabilization can be enhanced pharmacologically, which may be of therapeutic potential.”
Inhibition and enhancement of contextual fear memory destabilization.
Lee JL, Flavell CR.
Front Behav Neurosci. 2014 Apr 28;8:144. doi: 10.3389/fnbeh.2014.00144. eCollection 2014.
PMID: 24808841 [PubMed] Free PMC Article
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Bonus Video:

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Passing the Alzheimer’s Test and One’s Cannabinoid System ~ An Update

5/29/2014

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In March we noted the relentless strength of Alzheimer’s disease ~ and it’s still going strong. Good thing so is the science. Here are five more 2014 National Institutes of Health (PubMed) research updates on Alzheimer’s disease and cannabinoids.

The researchers in the third piece below make an interesting point concerning time; seems there haven’t been enough “adequately powered trials” on the safety of cannabinoids in older test subjects. That is harmful and a symptom of our polity.

Talk cannabinoids please … waiting another generation is not acceptable.

I.
Cannabinoid receptor-dependent metabolism of 2-arachidonoylglycerol during aging.
Pascual AC, Gaveglio VL, Giusto NM, Pasquaré SJ.
Exp Gerontol. 2014 Jul;55:134-42. doi: 10.1016/j.exger.2014.04.008. Epub 2014 Apr 24.
PMID: 24768821 [PubMed - in process]
Related citations

II.
Cannabinoids for pain in dementia: the good, the bad, and the ugly.
Ahmed AI, van den Elsen GA, van der Marck MA, Olde Rikkert MG.
J Am Geriatr Soc. 2014 May;62(5):1001-2. doi: 10.1111/jgs.12817. No abstract available.
PMID: 24828945 [PubMed - in process]
Related citations

III.
Efficacy and safety of medical cannabinoids in older subjects: a systematic review.
van den Elsen GA, Ahmed AI, Lammers M, Kramers C, Verkes RJ, van der Marck MA, Rikkert MG.
Ageing Res Rev. 2014 Mar;14:56-64. doi: 10.1016/j.arr.2014.01.007. Epub 2014 Feb 5.
PMID: 24509411 [PubMed - in process]
Related citations

IV.
Parsing the players: 2-arachidonoylglycerol synthesis and degradation in the CNS.
Murataeva N, Straiker A, Mackie K.
Br J Pharmacol. 2014 Mar;171(6):1379-91. doi: 10.1111/bph.12411.
PMID: 24102242 [PubMed - in process]
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V.
Cannabinoid agonists showing BuChE inhibition as potential therapeutic agents for Alzheimer's disease.
González-Naranjo P, Pérez-Macias N, Campillo NE, Pérez C, Arán VJ, Girón R, Sánchez-Robles E, Martín MI, Gómez-Cañas M, García-Arencibia M, Fernández-Ruiz J, Páez JA.
Eur J Med Chem. 2014 Feb 12;73:56-72. doi: 10.1016/j.ejmech.2013.11.026. Epub 2013 Dec 7.
PMID: 24378710 [PubMed - in process]
Related citations

VI.
Video ~ Holistic Alzheimer’s Video: Cannabis Oil and Medical Marijuana

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Homeostasis: If Not Cannabinoid Receptor Three, then Cannabinoid Receptor Third

Homeostasis: Publius’ (Ultralow) THC Political Cannabinoid Science

Homeostatic Cannabinoid Science ~ Publius’ World Cup Edition

Homeostatic Cannabinoid Science ~ Publius’ May Roundup

Passing the Alzheimer’s Test and One’s Cannabinoid System ~ An Update

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