One of the benefits of living in the 21st century is the ability to instantly refer to the thousands of medical studies available online when dealing with a medical issue. I know I always google the name of my ailment + pubmed whenever I have a question about anything. So I’m sure if you’re suffering asthma right now and are interested in CBD, you’re probably wondering what the experts have to say about it.
Studies into the effects of CBD on asthma have been overwhelmingly positive. This is especially true in the sense that no study has ever found any negative side effects of using CBD for asthma, whether or not it actually works for the patient. Most of the research shows that CBD, in the right quantities, is effective at reducing airway inflammation and limiting bronchial spasticity. Only one of the articles I looked at came to a neutral conclusion.
But this isn’t to say that every single study came to the same conclusion, just that almost all of them showed real benefits to asthmatics in some way. If you’re still interested in this, as I’m sure you are, I’ve included some of the more interesting studies I looked at below. You can just read the included abstract if you want, or if you want to dive in further you can click on the links below.
Evaluation of Serum Cytokines Levels and the Role of Cannabidiol Treatment in Animal Model of Asthma
- Date: 2015
- Researchers: Francieli Vuolo, Fabricia Petronilho, Beatriz Sonai, Cristiane Ritter, Jaime E C Hallak, Antonio Waldo Zuardi, José A Crippa, Felipe Dal-Pizzol
- Country: Brazil
Asthma represents a public health problem and traditionally is classified as an atopic disease, where the allergen can induce clinical airway inflammation, bronchial hyperresponsiveness, and reversible obstruction of airways. Studies have demonstrated the presence of T-helper 2 lymphocytes in the lung of patients with asthma. These cells are involved in cytokine production that regulates immunoglobulin synthesis. Recognizing that T cell interaction with antigens/allergens is key to the development of inflammatory diseases, the aim of this study is to evaluate the anti-inflammatory potential of cannabidiol (CBD) in this setting. Asthma was induced in 8-week-old Wistar rats by ovalbumin (OVA). In the last 2 days of OVA challenge animals received CBD (5 mg/kg, i.p.) and were killed 24 hours after. The levels of IL-4, IL-5, IL-13, IL-6, IL-10, and TNF-α were determinate in the serum. CBD treatment was able to decrease the serum levels of all analyzed cytokines except for IL-10 levels. CBD seems to be a potential new drug to modulate inflammatory response in asthma.
Cannabidiol reduces airway inflammation and fibrosis in experimental allergic asthma
- Date: 2019
- Researchers: Francieli Vuolo, Soraia C Abreu, Monique Michels, Débora G Xisto, Natália G Blanco, Jaime Ec Hallak, Antonio W Zuardi, José A Crippa, Cardine Reis, Marina Bahl, Emílio Pizzichinni, Rosemeri Maurici, Marcia M M Pizzichinni, Patricia R M Rocco, Felipe Dal-Pizzol
- Country: Brazil
Asthma is characterized by chronic lung inflammation and airway hyperresponsiveness. Asthma remains a major public health problem and, at present, there are no effective interventions capable of reversing airway remodelling. Cannabidiol (CBD) is known to exert immunomodulatory effects through the activation of cannabinoid-1 and – 2 (CB1 and CB2) receptors located in the central nervous system and immune cells, respectively. However, as the role of CBD on airway remodelling and the mechanisms of CB1 and CB2 aren’t fully elucidated, this study was designed to evaluate the effects of cannabidiol in this scenario. Allergic asthma was induced in Balb/c mice exposed to ovalbumin, and respiratory mechanics, collagen fibre content in airway and alveolar septa, cytokine levels, and CB1 and CB2 expression were determined. Moreover, expressions of CB1 and CB2 in induced sputum of asthmatic individuals and their correlation with airway inflammation and lung function were also evaluated. CBD treatment, regardless of dosage, decreased airway hyperresponsiveness, whereas static lung elastance only reduced with high dose. These outcomes were accompanied by decreases in collagen fibre content in both airway and alveolar septa and the expression of markers associated with inflammation in the bronchoalveolar lavage fluid and lung homogenate. There was a significant and inverse correlation between CB1 levels and lung function in asthmatic patients. CBD treatment decreased the inflammatory and remodelling processes in the model of allergic asthma. The mechanisms of action appear to be mediated by CB1/CB2 signalling, but these receptors may act differently on lung inflammation and remodelling.
Cannabidiol As A Novel Therapeutic Strategy For Oral Inflammatory Diseases: A Review Of Current Knowledge And Future Perspectives
- Date: 2020
- Researchers: Mariana Klein, Fernanda Gonçalves Salum, Karen Cherubini, Maria Antonia Zancanaro de Figueiredo
- Country: Brazil
The high frequency and painful profile of inflammatory oral lesions and the lack of an effective drug protocol for their management stimulate the search for pharmacological alternatives for the treatment of these conditions. Cannabidiol is the major non-psychotropic constituent of Cannabis sativa, receiving lately scientific interest because of its potential in the treatment of inflammatory disorders such as asthma, colitis and arthritis. There is little published in the current literature about the use of cannabidiol in oral health. Among its many protective functions, the ability to attenuate inflammation through the modulation of cytokines and its antiedema and analgesic effects may be important features in the treatment of oral lesions. In this review, we suggest that cannabidiol can be useful in the management of oral inflammatory disorders.
Pharmacological analysis of Cannabis sativa: A potent herbal plant
- Date: 2020
- Researchers: Muhammad Husnain, Muhammad Imran, Muhammad Ibrahim, Mohammad Ali Assiri, Naveed Zubair Wattoo, Ahmad Irfan
- Country: Pakistan, Saudi Arabia
This article briefly reviews the botany, traditional knowledge, pharmacological and therapeutic application of the plant C. sativa. This is an attempt to compile and document information about the chemical constituent, pharmacological and therapeutic effects of C. sativa as important herbal drug due to its safety and effectiveness. Studies have revealed its use as anti-bacterial, anti-fungal, anti-cancer, anti-inflammatory and improving testicular function in rats. Consumption of C. sativa is greater in all over the world among all other drugs of abuse in its various forms such as marijuana, hashish and cannabis oil. The study of herbal medicine spans the knowledge of biology, history, source, physical and chemical nature, and mechanism of action, traditional, medicinal and therapeutic use of drug. This article also provide knowledge about macroscopically and microscopically characters of Cannabis sativa with geographical sources. The wellknown cannabinoids are Tetrahydrocannabinol (THC), Cannabidiol (CBD) and Cannabichromene (CBC) and their pharmacological properties and importance have been extensively studied. Hence, efforts are required to establish and validate evidence regarding safety and practices of Ayurveda medicines.
Cannabidiol improves lung function and inflammation in mice submitted to LPS-induced acute lung injury
- Date: 2015
- Researchers: A Ribeiro, V I Almeida, C Costola-de-Souza, V Ferraz-de-Paula, M L Pinheiro, L B Vitoretti, J A Gimenes-Junior, A T Akamine, J A Crippa, W Tavares-de-Lima, J Palermo-Neto
- Country: Brazil
We have previously shown that the prophylactic treatment with cannabidiol (CBD) reduces inflammation in a model of acute lung injury (ALI). In this work we analyzed the effects of the therapeutic treatment with CBD in mice subjected to the model of lipopolysaccharide (LPS)-induced ALI on pulmonary mechanics and inflammation. CBD (20 and 80 mg/kg) was administered (i.p.) to mice 6 h after LPS-induced lung inflammation. One day (24 h) after the induction of inflammation the assessment of pulmonary mechanics and inflammation were analyzed. The results show that CBD decreased total lung resistance and elastance, leukocyte migration into the lungs, myeloperoxidase activity in the lung tissue, protein concentration and production of pro-inflammatory cytokines (TNF and IL-6) and chemokines (MCP-1 and MIP-2) in the bronchoalveolar lavage supernatant. Thus, we conclude that CBD administered therapeutically, i.e. during an ongoing inflammatory process, has a potent anti-inflammatory effect and also improves the lung function in mice submitted to LPS-induced ALI. Therefore the present and previous data suggest that in the future cannabidiol might become a useful therapeutic tool for the attenuation and treatment of inflammatory lung diseases.
The effect of phytocannabinoids on airway hyper-responsiveness, airway inflammation, and cough
- Date: 2015
- Researchers: Raj Makwana, Radhakrishnan Venkatasamy, Domenico Spina, Clive Page
- Country: United Kingdom
Cannabis has been demonstrated to have bronchodilator, anti-inflammatory, and antitussive activity in the airways, but information on the active cannabinoids, their receptors, and the mechanisms for these effects is limited. We compared the effects of Δ(9)-tetrahydrocannabinol, cannabidiol, cannabigerol, cannabichromene, cannabidiolic acid, and tetrahydrocannabivarin on contractions of the guinea pig-isolated trachea and bronchoconstriction induced by nerve stimulation or methacholine in anesthetized guinea pigs following exposure to saline or the proinflammatory cytokine, tumor necrosis factor α (TNF-α). CP55940 (2-[(1R,2R,5R)-5-hydroxy-2-(3-hydroxypropyl) cyclohexyl]-5-(2-methyloctan-2-yl)phenol), a synthetic cannabinoid agonist, was also investigated in vitro. The cannabinoids were also evaluated on TNF-α- and lipopolysaccharide-induced leukocyte infiltration into the lungs and citric acid-induced cough responses in guinea pigs. TNF-α, but not saline, augmented tracheal contractility and bronchoconstriction induced by nerve stimulation, but not methacholine. Δ(9)-Tetrahydrocannabinol and CP55940 reduced TNF-α-enhanced nerve-evoked contractions in vitro to the magnitude of saline-incubated trachea. This effect was antagonized by the cannabinoid 1 (CB(1)) and CB(2) receptor antagonists AM251 [N-(piperidin-1-yl)-5-(4-iodophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-caroxamide] and JTE907 [N-(1,3-benzodioxol-5-ylmethyl)-1,2-dihydro-7-methoxy-2-oxo-8-(pentyloxy)-3-quinolinecarboxamide], respectively. Tetrahydrocannabivarin partially inhibited the TNF-α-enhanced nerve-evoked contractions, whereas the other cannabinoids were without effect. The effect of cannabidiol and Δ(9)-tetrahydrocannabinol together did not differ from that of the latter alone. Only Δ(9)-tetrahydrocannabinol inhibited TNF-α-enhanced vagal-induced bronchoconstriction, neutrophil recruitment to the airways, and citric acid-induced cough responses. TNF-α potentiated contractions of airway smooth muscle in response to nerve stimulation by enhancing postganglionic acetylcholine release. Δ(9)-Tetrahydrocannabinol and CP55940 inhibited the TNF-α-enhanced acetylcholine release, and hence contraction and bronchoconstriction, through activation of presynaptic CB(1) and CB(2) receptors. The other cannabinoids did not influence cholinergic transmission, and only Δ(9)-THC demonstrated effects on airway hyper-responsiveness, anti-inflammatory activity, and antitussive activity in the airways.
Medical Cannabis in Asthmatic Patients
- Date: 2020
- Researchers: Amir Jarjou’i, Gabriel Izbicki
- Country: Israel
With the increased use of cannabis in the medicinal and recreational domains, it is becoming more important for physicians to better understand its harmful and beneficial effects. Although medical cannabis comes in several forms, the preferred route of administration is smoking or inhalation. After caring for three asthmatic patients who were treated with medical cannabis and who reported improvement in their symptoms, we decided to review the available data on the effects of medical cannabis on asthmatic patients.
Cannabinoids as novel anti-inflammatory drugs
- Date: 2010
- Researchers: Prakash Nagarkatti, Rupal Pandey, Sadiye Amcaoglu Rieder, Venkatesh L Hegde, and Mitzi Nagarkatti
- Country: USA
Allergic asthma is a complex inflammatory disorder characterized by airway hyper-responsiveness, elevated serum IgE, recruitment of eosinophils into the lung and mucus hypersecretion by goblet cells. Murine models of allergic airway disease, employing ovalbumin (OVA) as an aeroallergen, indicated that CD4+ Th2 cells (IL-4, IL-5 and IL-13) played a pivotal role in the pathophysiology of the allergic airway response. Intraperitoneal administration of THC or cannabinol (CBN) in OVA-sensitized and challenged A/J mice led to attenuation of serum IgE, IL-2, IL-4, IL-5 and IL-13 mRNA expression and decreased allergen-induced mucus production, indicating that cannabinoid-based compounds may represent a novel class of therapeutic agents for the treatment of allergic airway diseases. While most studies have shown that cannabinoids, such as THC, facilitate a Th1 to Th2 cytokine switch, as discussed previously, it is surprising that cannabinoids can also suppress allergic asthma triggered primarily by Th2 cytokines. It is possible that THC may affect other cells such as DCs and B cells directly in this model. Previous findings indicated that aerosolized THC was capable of causing significant bronchodilatation with minimal systemic side effects, but had a local irritating effect on the airways. Further bronchodilator effects of cannabinoids administered orally or by aerosol to asthmatic patients have also been reported. Similarly, endogenous cannabinoids have been shown to regulate airway responsiveness. In rodent lungs, a Ca2+-activated mechanism for the biosynthesis of anandamide was observed and CB1 receptors were found predominantly on axon terminals of airway nerves, indicating that endocannabinoids may regulate bronchial smooth muscle tone. It was reported that activation of CB1 receptors by locally released anandamide may participate in the control of bronchial contractility. Blocking of AEA-induced CB1 activity can enhance capsaicin-induced bronchospasm. However, the authors further suggested that the effects of AEA may depend on the state of the bronchial muscle. During capsaicin-evoked bronchospasm, AEA may reduce the muscle contraction, whereas AEA may cause bronchoconstriction in the absence of vagus nerve-constricting tone.