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Capsaicin

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1. Static magnetic field enhances the anticancer efficacy of capsaicin on HepG2 cells via capsaicin receptor TRPV1. (PubMed)

Static magnetic field enhances the anticancer efficacy of capsaicin on HepG2 cells via capsaicin receptor TRPV1. Static magnetic field (SMF) has shown some possibilities for cancer therapies. In particular, the combinational effect between SMF and anti-cancer drugs has drawn scientists' attentions in recent years. However, the underlying mechanism for the drug-specific synergistic effect is far from being understood. Besides, the drugs used are all conventional chemotherapy drugs, which may (...) cause unpleasant side effects. In this study, our results demonstrate for the first time that SMF could enhance the anti-cancer effect of natural compound, capsaicin, on HepG2 cancer cells through the mitochondria-dependent apoptosis pathway. We found that the synergistic effect could be due to that SMF increased the binding efficiency of capsaicin for the TRPV1 channel. These findings may provide a support to develop an application of SMF for cancer therapy. The present study offers the first trial

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2018 PLoS ONE

2. QUTENZA (capsaicin), local analgesic patch

QUTENZA (capsaicin), local analgesic patch Haute Autorité de Santé - QUTENZA (capsaïcine), antalgique local en patch Développer la qualité dans le champ sanitaire, social et médico-social Recherche Évaluation & Recommandation La HAS Accréditation & Certification Outils, Guides & Méthodes Agenda Avis sur les Médicaments QUTENZA (capsaïcine), antalgique local en patch Substance active (DCI) capsaïcine ANTALGIE - Nouvelle indication Nature de la demande Extension d'indication Avis de la CT du 21

2018 Haute Autorite de sante

3. Topical Capsaicin for Neuropathic and Osteoarthritis Pain: Maybe not so hot?

Topical Capsaicin for Neuropathic and Osteoarthritis Pain: Maybe not so hot? Tools for Practice is proudly sponsored by the Alberta College of Family Physicians (ACFP). ACFP is a provincial, professional voluntary organization, representing more than 4,800 family physicians, family medicine residents, and medical students in Alberta. Established over sixty years ago, the ACFP strives for excellence in family practice through advocacy, continuing medical education and primary care research (...) . www.acfp.ca December 10, 2018 Topical Capsaicin for Neuropathic and Osteoarthritis Pain: Maybe not so hot? Clinical Question: What are the benefits and harms of topical capsaicin for neuropathic or osteoarthritis pain? Bottom Line: Evidence for topical capsaicin in neuropathic pain and hand osteoarthritis is highly inconsistent, with some studies showing clinical benefit (variably defined) for one in 4-7 patients while other studies show no benefit. There is no benefit in knee osteoarthritis. Local

2018 Tools for Practice

4. QUTENZA (capsaicin), local analgesic patch

QUTENZA (capsaicin), local analgesic patch Haute Autorité de Santé - QUTENZA (capsaïcine), antalgique local en patch Développer la qualité dans le champ sanitaire, social et médico-social Recherche Évaluation & Recommandation La HAS Accréditation & Certification Outils, Guides & Méthodes Agenda Avis sur les Médicaments QUTENZA (capsaïcine), antalgique local en patch Substance active (DCI) capsaïcine DOULEUR - Mise au point Nature de la demande Réévaluation SMR et ASMR Avis de la CT du 05

2016 Haute Autorite de sante

5. The red pepper's spicy ingredient capsaicin activates AMPK in HepG2 cells through CaMKKβ. (PubMed)

The red pepper's spicy ingredient capsaicin activates AMPK in HepG2 cells through CaMKKβ. Capsaicin is a natural compound present in chili and red peppers and the responsible of their spicy flavor. It has recently provoked interest because of its antitumoral effects in many cell types although its action mechanism is not clearly understood. As metabolic dysregulation is one of the hallmarks of cancer cells and the key metabolic sensor in the AMP-activated kinase (AMPK), in this study we (...) explored the ability of capsaicin to modulate AMPK activity. We found that capsaicin activated AMPK in HepG2 cells by increasing AMPK phosphorylation and its downstream target ACC. Mechanistically, we determined that capsaicin activated AMPK through the calcium/calmodulin-dependent protein kinase kinase β, CaMKKβ as either the CaMKK inhibitor STO-609 or CaMKK knock down with siRNA abrogated the activation of AMPK. Moreover, capsaicin decreased cell viability, inhibited Akt/mTOR pathway and increased

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2019 PLoS ONE

6. Capsaicin for non-allergic rhinitis. (PubMed)

Capsaicin for non-allergic rhinitis. There are many forms of rhinitis. Patients are diagnosed with non-allergic rhinitis when anatomic, infectious and allergic aetiologies have been excluded. The symptoms, including nasal congestion, blockage or obstruction, clear rhinorrhoea, sneezing and, less frequently, nasal itching, can range from mild to debilitating. It affects between 25% and 50% of patients with rhinitis. Several medications are widely used in the treatment of non-allergic rhinitis (...) , including oral and topical nasal antihistamines, intranasal and (rarely) systemic corticosteroids, and anticholinergics. Capsaicin, the active component of chili peppers, delivered intranasally, is considered a treatment option for non-allergic rhinitis.To assess the effectiveness of capsaicin in the management of non-allergic rhinitis compared with no therapy, placebo or other topical or systemic medications, or two or more of the above therapies in combination, or different capsaicin regimens.We

2015 Cochrane

7. Effects of topical combinations of clonidine and pentoxifylline on capsaicin-induced allodynia and post-capsaicin tourniquet-induced pain in healthy volunteers: a double-blind, randomized, controlled study. (PubMed)

Effects of topical combinations of clonidine and pentoxifylline on capsaicin-induced allodynia and post-capsaicin tourniquet-induced pain in healthy volunteers: a double-blind, randomized, controlled study. This double-blind randomized controlled study was designed to evaluate the analgesic effects of topical treatments with clonidine (CLON) and pentoxifylline (PTX) tested alone or as low- and high-dose combinations in a human experimental model of pain. Of 69 healthy subjects aged 18 to 60 (...) years, 23 each were randomly allocated to low-dose (0.04% + 2%) and high-dose (0.1% + 5%) CLON + PTX groups. Both of these groups also received their corresponding placebos in one of 2 treatment periods separated by at least 48 hours. Twenty-three additional subjects received either CLON (0.1%) or PTX (5%) as single drug treatments, in each of 2 treatment periods. Assessment of analgesic efficacy was based on allodynic effects of previous intraepidermal capsaicin injection, as well as postcapsaicin

2016 Pain

8. Non-pungent long chain capsaicin-analogs arvanil and olvanil display better anti-invasive activity than capsaicin in human small cell lung cancers (PubMed)

Non-pungent long chain capsaicin-analogs arvanil and olvanil display better anti-invasive activity than capsaicin in human small cell lung cancers The nutritional compound capsaicin inhibits the invasion of many types of human cancers. The clinical development of capsaicin as an anti-cancer drug is limited due to its unfavorable side effects like burning sensation, stomach cramps, gut pain and nausea. This study compared the anti-invasive activity of capsaicin to non-pungent long chain (...) capsaicin analogs, namely arvanil and olvanil, in human small cell lung cancer cells. Boyden chamber invasion assays revealed that arvanil and olvanil displayed improved anti-invasive activity relative to capsaicin in human SCLC cells. The results of the Boyden chamber assay were confirmed by the spherical invasion assay, and similar results were obtained. The anti-invasive activity of arvanil, olvanil and capsaicin were independent of TRPV and CB1 receptors. Furthermore, the anti-invasive activity

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2016 Cell adhesion & migration

9. Altered heat nociception in cockroach Periplaneta americana L. exposed to capsaicin. (PubMed)

Altered heat nociception in cockroach Periplaneta americana L. exposed to capsaicin. Some natural alkaloids, e.g. capsaicin and camphor, are known to induce a desensitization state, causing insensitivity to pain or noxious temperatures in mammals by acting on TRP receptors. Our research, for the first time, demonstrated that a phenomenon of pharmacological blockade of heat sensitivity may operate in American cockroach, Periplaneta americana (L.). We studied the escape reaction time from 50°C (...) for American cockroaches exposed to multiple doses of different drugs affecting thermo-TRP. Capsaicin, capsazepine, and camphor induced significant changes in time spent at noxious ambient temperatures. Moreover, we showed that behavioral thermoregulation in normal temperature ranges (10-40°C) is altered in treated cockroaches, which displayed a preference for warmer regions compared to non-treated insects. We also measured the levels of malondialdehyde (MDA) and catalase activity to exclude the secondary

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2018 PLoS ONE

10. Allergen challenge increases capsaicin evoked cough responses in allergic asthma. (PubMed)

Allergen challenge increases capsaicin evoked cough responses in allergic asthma. Cough is a common and troublesome symptom in asthmatic patients, but little is known about the neuronal pathways that trigger cough. The mechanisms by which airway inflammation, airway hyperresponsiveness, and variable airflow obstruction cause cough are unclear.We sought to investigate the effects of allergen exposure on cough reflex sensitivity.We performed a 9-visit, randomized, single-blind, placebo-controlled (...) , 2-way crossover study comparing cough responses to inhaled capsaicin in patients with mild atopic asthma after allergen challenge compared with diluent control. Full-dose capsaicin challenge was performed at screening to determine the capsaicin dose inducing a half-maximal response, which was subsequently administered at 30 minutes and 24 hours after inhaled allergen/diluent challenge. Spontaneous coughing was measured for 24 hours after allergen/diluent. Methacholine challenge and sputum

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2019 Journal of Allergy and Clinical Immunology

11. Capsaicin-induced pain and sensitisation in the postpartum period. (PubMed)

Capsaicin-induced pain and sensitisation in the postpartum period. Recovery from Caesarean delivery in women and surgical nerve injury in animals after delivery is more rapid than expected, an effect reversed in animals by spinal injection of an oxytocin receptor antagonist. We hypothesised that endogenous modulation of acute pain is altered postpartum.Endogenous inhibition of acute pain in a conditioned pain modulation paradigm or endogenous sensitisation by topical capsaicin was tested (...) in women who were breastfeeding 10-14 days after Caesarean delivery and age-matched controls (n=80 total: 20 per group and 20 per test). The study was powered to detect a difference in area of hyperalgesia after capsaicin of 33%. Capsaicin-evoked pain was recorded in women, and capsaicin-evoked mechanical hypersensitivity was measured in rats 48 h after delivery and in age-matched female and male animals.There was no effect of the postpartum period in the endogenous sensitisation assay in women

2019 British Journal of Anaesthesia

12. Capsaicin and gingerol analogues inhibit the growth of efflux-multidrug resistant bacteria and R-plasmids conjugal transfer. (PubMed)

Capsaicin and gingerol analogues inhibit the growth of efflux-multidrug resistant bacteria and R-plasmids conjugal transfer. Capsicum and ginger are used widely in human diets and in folklore medicines. Chemically, gingerol is a relative of capsaicin and both classes of compounds are notable for their spiciness and characteristic pungent aroma. Previous studies have demonstrated that these compounds contain antimicrobial compounds with robust pharmacological importance.The present study (...) identified using Nuclear Magnetic resonance (NMR) and Mass spectroscopy (MS). Capsaicin analogues nonivamide, 6-gingerol, 6-shogaol, capsaicin and dihydrocapsaicin were screened for antimicrobial activity against a panel of methicillin-resistant Staphylococcus aureus (MRSA) and Gram-negative bacteria strains using microdilution method while the plasmid transfer inhibition assay of the compounds was determined by broth mating method.The bioactive fraction Ca-11 showed good inhibition rates (8.57-25.52

2019 Journal of Ethnopharmacology

13. Capsaicin reduces Alzheimer-associated tau changes in the hippocampus of type 2 diabetes rats. (PubMed)

Capsaicin reduces Alzheimer-associated tau changes in the hippocampus of type 2 diabetes rats. Type 2 diabetes (T2D) is a high-risk factor for Alzheimer's disease (AD) due to impaired insulin signaling pathway in brain. Capsaicin is a specific transient receptor potential vanilloid 1 (TRPV1) agonist which was proved to ameliorate insulin resistance. In this study, we investigated whether dietary capsaicin could reduce the risk of AD in T2D. T2D rats were fed with capsaicin-containing high fat (...) (HF) diet for 10 consecutive days (T2D+CAP). Pair-fed T2D rats (T2D+PF) fed with the HF-diet of average dose of T2D+CAP group were included to control for the effects of reduced food intake and body weight. Capsaicin-containing standard chow was also introduced to non-diabetic rats (NC+CAP). Blood glucose and insulin were monitored. The phosphorylation level of tau at individual sites, the activities of phosphatidylinositol 3 kinase/protein kinase B (PI3K/AKT) and glycogen synthase kinase-3β (GSK

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2017 PLoS ONE

14. Topical capsaicin (low concentration) for chronic neuropathic pain in adults. (PubMed)

Topical capsaicin (low concentration) for chronic neuropathic pain in adults. Topical creams with capsaicin are used to treat pain from a wide range of chronic conditions including neuropathic pain. Following application to the skin capsaicin causes enhanced sensitivity to noxious stimuli, followed by a period with reduced sensitivity and, after repeated applications, persistent desensitisation. There is uncertainty about the efficacy and tolerability of capsaicin for treating painful chronic (...) neuropathies. This is an update of an earlier review of topical capsaicin for chronic neuropathic pain in adults that looked at all doses and formulations of capsaicin. The original review has now been split: here we consider only formulations using a low concentration of capsaicin (< 1%) applied several times daily over several weeks, while another review will consider a single application of capsaicin at a high concentration.To review the evidence from controlled trials on the efficacy and tolerability

2012 Cochrane

15. Thromboxane-induced α-CGRP release from peripheral neurons is an essential positive feedback loop in capsaicin-induced neurogenic inflammation. (PubMed)

Thromboxane-induced α-CGRP release from peripheral neurons is an essential positive feedback loop in capsaicin-induced neurogenic inflammation. α-CGRP is synthesized by sensory nerves in the dermis and its release can cause vasodilation and local inflammation. Its vasorelaxant effects are based on the direct activation of smooth muscle and endothelial cells, as well as the activation of mast cells causing the release of vasoactive and proinflammatory mediators. Here, we show (...) that in the capsaicin model for neurogenic inflammation, capsaicin-induced edema formation is mediated by α-CGRP and mast cells, but is absent in thromboxane receptor-deficient mice. Capsaicin treatment of mice induced a thromboxane synthesis, which was mediated by α-CGRP and mast cells. Fittingly, α-CGRP induced thromboxane synthesis in mast cells and the thromboxane receptor agonist I-BOP caused edema formation independently of mast cells, suggesting that mast cells are the source of thromboxane. Most importantly

2018 Journal of Investigative Dermatology

16. Real-Time Investigation of Skin Blood Flow Changes Induced by Topical Capsaicin. (PubMed)

Real-Time Investigation of Skin Blood Flow Changes Induced by Topical Capsaicin. Capsaicin induces a localized inflammatory process known as neurogenic inflammation upon its topical administration on the skin, due to the release of various neuropeptides from the cutaneous sensory nerve endings. In this study, we investigated real-time skin blood flow changes that occur in neurogenic inflammation induced by topical capsaicin by means of in vivo reflectance confocal microscopy. 27 healthy (...) subjects (15 women and 12 men, mean age ± Standard Deviation: 22.62±4.47) were administered topical capsaicin solution (Capsaicin group) or immersion oil (Control group) on the dorsal side of their non-dominant hand. At different time intervals during administration (0, 10, 25, and 40 minutes), cutaneous blood flow was evaluated using reflectance confocal microscopy and compared between the two groups. Blood flow values were higher during topical capsaicin, with significant increase after 25 (P=0.0160

2018 Acta dermatovenerologica Croatica : ADC

17. Acute Capsaicin Supplementation Improves 1,500-m Running Time-Trial Performance and Rate of Perceived Exertion in Physically Active Adults. (PubMed)

Acute Capsaicin Supplementation Improves 1,500-m Running Time-Trial Performance and Rate of Perceived Exertion in Physically Active Adults. de Freitas, MC, Cholewa, JM, Gobbo, LA, de Oliveira, JVNS, Lira, FS, and Rossi, FE. Acute capsaicin supplementation improves 1,500-m running time-trial performance and rate of perceived exertion in physically active adults. J Strength Cond Res 32(2): 572-577, 2018-The purpose of this study was to investigate the acute effect of capsaicin supplementation (...) on performance, rate of perceived exertion (RPE), and blood lactate concentrations during short-duration running in physically active adults. Ten physically active men (age = 23.5 ± 1.9 years, mass = 78.3 ± 12.4 kg, and height = 177.9 ± 5.9 cm) completed 2 randomized, double-blind trials: Capsaicin condition (12 mg) or a placebo condition. Forty-five minutes after supplement consumption, the participants performed a 1,500-m running time trial. Time (in seconds) was recorded. Blood lactate concentration

2018 Journal of Strength And Conditioning Research

18. Acute Capsaicin Supplementation Improves Resistance Training Performance in Trained Men. (PubMed)

Acute Capsaicin Supplementation Improves Resistance Training Performance in Trained Men. Conrado de Freitas, M, Cholewa, JM, Freire, RV, Carmo, BA, Bottan, J, Bratfich, M, Della Bandeira, MP, Gonçalves, DC, Caperuto, EC, Lira, FS, and Rossi, FE. Acute capsaicin supplementation improves resistance training performance in trained men. J Strength Cond Res 32(8): 2227-2232, 2018-The purpose of this study was to investigate the acute effect of capsaicin supplementation on performance, rate (...) of perceived exertion (RPE), and blood lactate concentrations during resistance exercise in healthy trained young men. Ten resistance-trained men (age = 22.7 ± 4.0 years, mass = 82.3 ± 9.6 kg, and height = 175 ± 0.1 cm) completed 2 randomized, double-blind trials: capsaicin condition (12 mg) or a placebo condition. Forty-five minutes after supplement consumption, subjects performed 4 sets until movement failure in the squat exercise at 70% of 1 repetition maximum with 90 seconds of rest interval between

2018 Journal of Strength And Conditioning Research

19. Role of capsaicin- and heat-sensitive afferents in stimulation of acupoint-induced pain and analgesia in humans. (PubMed)

Role of capsaicin- and heat-sensitive afferents in stimulation of acupoint-induced pain and analgesia in humans. We investigated role of capsaicin-sensitive afferents within and without the areas of Zusanli (ST36)/Shangjuxu (ST37) acupoints along the stomach (ST) meridian in the perception and modulation of pain assessed by visual analog scale of pain and its distribution rated by subjects, pressure pain threshold (PPT), and heat pain threshold (HPT) in humans. Compared with the treatment (...) of non-acupoint area, capsaicin (100µg/50µl) administered into either ST36 or ST37 acupoint caused the strongest pain intensity and the most extensive pain distribution, followed by rapid onset, bilateral, long-lasting secondary mechanical hyperalgesia and slower onset secondary heat hypoalgesia (1day after the capsaicin treatment). Between treatments of different acupoints, capsaicin administrated into the ST36 acupoint exhibited the stronger pain intensity and more widespread pain distribution

2018 Neuroscience

20. The Effect of Dietary Supplements Containing Green Tea, Capsaicin and Ginger Extracts on Weight Loss and Metabolic Profiles in Overweight Women: A Randomized Double-Blind Placebo-Controlled Clinical Trial. (PubMed)

The Effect of Dietary Supplements Containing Green Tea, Capsaicin and Ginger Extracts on Weight Loss and Metabolic Profiles in Overweight Women: A Randomized Double-Blind Placebo-Controlled Clinical Trial. This study was conducted to determine the effects of dietary supplements containing green tea, capsaicin and ginger extracts on weight loss and metabolic profiles among overweight women.This randomized double-blind placebo-controlled clinical trial was implemented among 50 overweight women (...) . Participants were randomly divided into 2 groups. Group A received dietary supplements containing 125 mg green tea, 25 mg capsaicin and 50 mg ginger extracts (n = 25) group B received placebos (n = 25) twice with lunch and twice with dinner daily for 8 weeks.Compared with placebo, taking dietary supplements containing green tea, capsaicin and ginger resulted in a significant decrease in weight (-1.8 ± 1.5 vs. +0.4 ± 1.2 kg, respectively, p < 0.001) and body mass index (BMI; -0.7 ± 0.5 vs. +0.1 ± 0.5 kg/m2

2018 Annals of nutrition & metabolism

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