Prevalence of Cannabis Withdrawal Symptoms Among People With Regular or Dependent Use of Cannabinoids. A Systematic Review and Meta-analysis Anees Bahji, MD; Callum Stephenson; Richard Tyo, BSocSc, RP; Emily R. Hawken, MSc, PhD; Dallas P. Seitz, MD, PhD JAMA Network Open, 2020, 3, (4), e202370. doi : 10.1001/jamanetworkopen.2020.2370 Abstract IMPORTANCE : Cannabis withdrawal syndrome (CWS)—a diagnostic indicator of cannabis use disorder—commonly occurs on cessation of heavy and prolonged cannabis use. To date, the prevalence of CWS syndrome has not been well described, nor have the factors potentially associated with CWS. OBJECTIVES : To estimate the prevalence of CWS among individuals with regular or dependent use of [...]
Lire la suiteDynamic coupling of whole-brain neuronal and neurotransmitter systems Morten L. Kringelbach, Josephine Cruzat, Joana Cabral, Gitte Moos Knudsen, Robin Carhart-Harris, Peter C. Whybrow Nikos K. Logothetis, and Gustavo Deco PNAS, 2020, 1-11 doi : 10.1073/pnas.1921475117 Remarkable progress has come from whole-brain models linking anatomy and function. Paradoxically, it is not clear how a neuronal dynamical system running in the fixed human anatomical connectome can give rise to the rich changes in the functional repertoire associated with human brain function, which is impossible to explain through long-term plasticity. Neuromodulation evolved to allow for such flexibility by dynamically updating the effectivity of the fixed anatomical connectivity. [...]
Lire la suiteLa classification des substances psychoactives. Lorsque la science n’est pas écoutée Commission Globale de Politique en Matière de Drogues Rapport 2019 Sommaire Avant-propos................................................................................................................................ 3 Résumé......................................................................................................................................... 4 Classification des drogues : science ou idéologie?....................................................................... 7 Le système international de classification.................................................................................. 13 Histoire du régime mondial de contrôle des drogues................................................................. 13 Les incohérences corrompent le système actuel......................................................................... 16 Défaut d’équilibre : l’accès aux médicaments sous contrôle....................................................... 19 Recommandation......................................................................................................................... 21 Les enseignements des marchés (semi-)légaux.......................................................................... 25 Les plantes psychoactives non-classées...................................................................................... 25 La régulation légale du cannabis................................................................................................. 26 Les nouvelles substances psychoactives...................................................................................... 27 Recommandation......................................................................................................................... 29 Difficultés et options de réforme................................................................................................. 31 Améliorer le système actuel......................................................................................................... 31 Une échelle rationnelle des risques............................................................................................. 33 Redonner de la flexibilité nationale pour la régulation légale.................................................... 35 Recommandation........................................................................................................................ 37 Observations finales.................................................................................................................... [...]
Lire la suiteAn epidemiological, developmental and clinical overview of cannabis use during pregnancy Hanan El Marroun, Qiana L. Brown, Ingunn Olea Lund, Victoria H. Coleman-Cowger, Amy M. Loree, Devika Chawlaj, Yukiko Washio Preventive Medicine, 2018, 116, 1–5 Doi : 10.1016/j.ypmed.2018.08.036 A B S T R A C T The objective of the current narrative literature review is to provide an epidemiological, developmental and clinical overview on cannabis use during pregnancy. Cannabis use in pregnancy poses major health concerns for pregnant mothers and their developing children. Although studies on the short- and long-term consequences of prenatal cannabis exposure are increasing, findings have been inconsistent or difficult to interpret [...]
Lire la suiteThe Broad Concept of “Spasticity- Plus Syndrome” in Multiple Sclerosis : A Possible New Concept in the Management of Multiple Sclerosis Symptoms Óscar Fernández, Lucienne Costa-Frossard, Marisa Martínez-Ginés, Paloma Montero, José Maria Prieto and Lluis Ramió Frontiers in Neurology , 2020 | Volume 11 | Article 152 doi : 10.3389/fneur.2020.00152 Multiple sclerosis (MS) pathology progressively affects multiple central nervous system (CNS) areas. Due to this fact, MS produces a wide array of symptoms. Symptomatic therapy of one MS symptom can cause or worsen other unwanted symptoms (anticholinergics used for bladder dysfunction produce impairment of cognition, many MS drugs produce erectile dysfunction, etc.). Appropriate symptomatic [...]
Lire la suiteCannabinol inhibits proliferation and induces cell cycle arrest and apoptosis in glioblastoma, hepatocellular carcinoma and breast cancer cells Nuanying ZHONG, Thesis, Master of Science in Biological Sciences Faculty of Arts and Science, Department of Biological Sciences, University of Lethbridge Research Repository, Canada 2020 https://hdl.handle.net/10133/5697 ABSTRACT Cannabis sativa is an agriculturally and medicinally plant with many pharmaceutical properties. Cancer is a deadly disease; it is estimated that it will cause over 80 thousand deaths in 2019 in Canada. Although numerous studies have demonstrated that cannabinoids have anti-tumorous properties in various cancers, the anti-malignant activities of cannabinol (CBN) on carcinogenesis and underlying mechanisms remain largely unknown. In this study, we [...]
Lire la suiteTerpenoids From Cannabis Do Not Mediate an Entourage Effect by Acting at Cannabinoid Receptors David B. Finlay, Kathleen J. Sircombe, Mhairi Nimick, Callum Jones and Michelle Glass Frontiers in Pharmacology, 2020, Volume 11, Article 359, 1-9. doi : 10.3389/fphar.2020.00359 The entourage effect was a proposed explanation for biological observations that endocannabinoid ligand activities can be modified by other lipids released from cells at the same time. An increasing volume of anecdotal reports and interest in the plant have provoked research into the activity of minor chemical constituents of the plant—including volatile terpenoids such as myrcene, a- and b- pinene, b-caryophyllene, and limonene. However, to [...]
Lire la suiteAppel urgent de la société civile : du cannabis médical pour nos aînés !, signataires, 20 avril 2020
Appel urgent de la société civile : du cannabis médical pour nos aînés ! Nous, associations d’usagers de cannabis à des fins thérapeutiques, médecins et travailleurs sociaux dans le champ des addictions, militants humanitaires appelons solennellement le ministre de la Santé, Olivier Véran, le gouvernement d’Edouard Philippe et le Président de la République, Emmanuel Macron, à rendre possible l’accès immédiat au cannabis à usage médical. Comme l’ont expliqué William Lowenstein et Jean-Yves Nau (Slate du 16 avril 2020), il est choquant que nos anciens reçoivent force benzodiazépines, antidépresseurs, neuroleptiques et opioïdes sans même que l’accès au cannabis à usage thérapeutique soit possible en [...]
Lire la suiteCBD Reverts the Mesenchymal Invasive Phenotype of Breast Cancer Cells Induced by the Inflammatory Cytokine IL-1 Lázaro García-Morales, Aída M Castillo, José Tapia Ramírez, Horacio Zamudio-Meza, Ma del Carmen Domínguez-Robles and Isaura Meza International Journal of Molecular Science, 2020, 21, 2429 doi : 10.3390/ijms21072429 Abstract : Cannabidiol (CBD) has been used to treat a variety of cancers and inflammatory conditions with controversial results. In previous work, we have shown that breast cancer MCF-7 cells, selected by their response to inflammatory IL-1 cytokine, acquire a malignant phenotype (6D cells) through an epithelial mesenchymal transition (EMT).We evaluated CBD as a potential inhibitor of this transition and inducer of [...]
Lire la suiteHigh Times for Painful Blues : The Endocannabinoid System in Pain-Depression Comorbidity Marie Fitzgibbon, David P. Finn, Michelle Roche International Journal of Neuropsychopharmacology, 2016, 19, (3), 1–20 doi : 10.1093/ijnp/pyv095 Abstract Depression and pain are two of the most debilitating disorders worldwide and have an estimate co-occurrence of up to 80%. Comorbidity of these disorders is more difficult to treat, associated with significant disability and impaired healthrelated quality of life than either condition alone, resulting in enormous social and economic cost. Several neural substrates have been identified as potential mediators in the association between depression and pain, including neuroanatomical reorganization, monoamine and neurotrophin depletion, dysregulation [...]
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