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Stringasci MD, Ciol H, Romano RA, Buzza HH, Leite IS, Inada NM, Bagnato VS. MAL-associated methyl nicotinate for topical PDT improvement. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2020; 213:112071. [PMID: 33242779 DOI: 10.1016/j.jphotobiol.2020.112071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 09/29/2020] [Accepted: 10/25/2020] [Indexed: 10/23/2022]
Abstract
Photosensitization of all tissue in sufficient quantity to generate damage is one of the limiting factors for Photodynamic Therapy (PDT) efficiency. Methyl nicotinate (MN) is a thermogenic and vasodilating substance that facilitates the topical tissue penetration of some compounds. The topical MAL (methyl aminolevulinate) PDT is commonly used as a precursor of protoporphyrin IX (PpIX). This study investigates the safety of topical use in NM, as well as its ability to improve the efficiency of topical PDT. For this, we investigate the cytotoxicity of MN, as well as its actions in increasing cellular metabolism and vasodilation. Besides, its ability to optimize the formation of PpIX in the tissue when associated with MAL cream was investigated, besides assessing the severity of necrosis obtained by treatments. The cytotoxicity of MN was tested for concentrations of 0, 0.1, 0.25, 0.5, 0.75 and 1% in cell culture. For the concentration of 0.5%, the cellular metabolism was evaluated using confocal microscopy to calculate the redox rate. In the Chorioallantoic Membrane Model, vasodilation was evaluated for concentrations of 0.5 and 1% MN during 1 h of incubation. In the animal model, the healthy skin of Wistar rat was used to evaluate the production of PpIX in the tissue and the degree of necrosis obtained by Photodynamic therapy when using NM associated with methyl aminolevulinate. It was observed the non-cytotoxicity in vitro of MN in the concentration used (0.5%) and its ability to increase cellular metabolism. In a chorioallantoic model, the MN vasodilation power was demonstrated for different caliber of vessels. In vivo studies are showing that the incorporation of MN in the MAL cream increases the amount of PpIX produced in the tissue causing a higher effect on the epidermis after PDT. This improvement of the protocol may make the procedure more effective both in the destruction of tumor tissue and in the treatment of deeper cells decreasing possible recurrence, in addition to allowing improvements in the protocol, such as reducing the cream's incubation time.
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Affiliation(s)
| | - Heloísa Ciol
- Sao Carlos Institute of Physics, University of Sao Paulo, Brazil
| | | | - Hilde Harb Buzza
- Sao Carlos Institute of Physics, University of Sao Paulo, Brazil
| | | | | | - Vanderlei Salvador Bagnato
- Sao Carlos Institute of Physics, University of Sao Paulo, Brazil; Hagler Fellow, Texas A&M University, College Station, Texas, USA
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Salehi B, Sharopov F, Boyunegmez Tumer T, Ozleyen A, Rodríguez-Pérez C, Ezzat SM, Azzini E, Hosseinabadi T, Butnariu M, Sarac I, Bostan C, Acharya K, Sen S, Nur Kasapoglu K, Daşkaya-Dikmen C, Özçelik B, Baghalpour N, Sharifi-Rad J, Valere Tsouh Fokou P, Cho WC, Martins N. Symphytum Species: A Comprehensive Review on Chemical Composition, Food Applications and Phytopharmacology. Molecules 2019; 24:2272. [PMID: 31216776 PMCID: PMC6631335 DOI: 10.3390/molecules24122272,] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/05/2019] [Accepted: 06/11/2019] [Indexed: 06/28/2023] Open
Abstract
Symphytum species belongs to the Boraginaceae family and have been used for centuries for bone breakages, sprains and rheumatism, liver problems, gastritis, ulcers, skin problems, joint pain and contusions, wounds, gout, hematomas and thrombophlebitis. Considering the innumerable potentialities of the Symphytum species and their widespread use in the world, it is extremely important to provide data compiling the available literature to identify the areas of intense research and the main gaps in order to design future studies. The present review aims at summarizing the main data on the therapeutic indications of the Symphytum species based on the current evidence, also emphasizing data on both the efficacy and adverse effects. The present review was carried out by consulting PubMed (Medline), Web of Science, Embase, Scopus, Cochrane Database, Science Direct and Google Scholar (as a search engine) databases to retrieve the most updated articles on this topic. All articles were carefully analyzed by the authors to assess their strengths and weaknesses, and to select the most useful ones for the purpose of review, prioritizing articles published from 1956 to 2018. The pharmacological effects of the Symphytum species are attributed to several chemical compounds, among them allantoin, phenolic compounds, glycopeptides, polysaccharides and some toxic pyrrolizidine alkaloids. Not less important to highlight are the risks associated with its use. In fact, there is increasing consumption of over-the-counter drugs, which when associated with conventional drugs can cause serious and even fatal adverse events. Although clinical trials sustain the folk topical application of Symphytum species in musculoskeletal and blunt injuries, with minor adverse effects, its antimicrobial potency was still poorly investigated. Further studies are needed to assess the antimicrobial spectrum of Symphytum species and to characterize the active molecules both in vitro and in vivo.
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Affiliation(s)
- Bahare Salehi
- Student Research Committee, School of Medicine, Bam University of Medical Sciences, Bam 44340847, Iran.
| | - Farukh Sharopov
- Department of Pharmaceutical Technology, Avicenna Tajik State Medical University, Rudaki 139, Dushanbe 734003, Tajikistan.
| | - Tugba Boyunegmez Tumer
- Department of Molecular Biology and Genetics, Faculty of Arts and Science, Canakkale Onsekiz Mart University, Canakkale 17020, Turkey.
| | - Adem Ozleyen
- Graduate Program of Biomolecular Sciences, Institute of Natural and Applied Sciences, Canakkale Onsekiz Mart University, Canakkale 17020, Turkey.
| | - Celia Rodríguez-Pérez
- Department of Nutrition and Food Science, University of Granada, Campus of Cartuja, E-18071 Granada, Spain.
- Institute of Nutrition and Food Technology (INYTA) 'José Mataix', Biomedical Research Centre, University of Granada, Avenida del Conocimiento s/n, E-18071 Granada, Spain.
| | - Shahira M Ezzat
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr El-Ainy Street, Cairo 11562, Egypt.
- Department of Pharmacognosy, Faculty of Pharmacy, October University for Modern Science and Arts (MSA), 6th October City 12566, Egypt.
| | - Elena Azzini
- Centre for Research on Food and Nutrition, Council for Agricultural Research and Economics, Rome 546-00178 , Italy.
| | - Tahereh Hosseinabadi
- Department of Pharmacognosy and Biotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran 11369, Iran.
| | - Monica Butnariu
- Banat's University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara, 300645 Calea Aradului 119, Timis, Romania.
| | - Ioan Sarac
- Banat's University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara, 300645 Calea Aradului 119, Timis, Romania.
| | - Cristian Bostan
- Banat's University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara, 300645 Calea Aradului 119, Timis, Romania.
| | - Krishnendu Acharya
- Molecular and Applied Mycology and Plant Pathology Laboratory, Department of Botany, University of Calcutta, Kolkata 700019, India.
| | - Surjit Sen
- Molecular and Applied Mycology and Plant Pathology Laboratory, Department of Botany, University of Calcutta, Kolkata 700019, India.
- Department of Botany, Fakir Chand College, Diamond Harbour, West Bengal 743331, India.
| | - Kadriye Nur Kasapoglu
- Istanbul Technical University, Chemical and Metallurgical Engineering Faculty, Food Engineering Department, Ayazağa Campus, Maslak 34469, Istanbul, Turkey.
| | - Ceren Daşkaya-Dikmen
- Istanbul Technical University, Chemical and Metallurgical Engineering Faculty, Food Engineering Department, Ayazağa Campus, Maslak 34469, Istanbul, Turkey.
- Istanbul Gedik University, Department of Gastronomy and Culinary Arts, 34876 Kartal, Istanbul, Turkey.
| | - Beraat Özçelik
- Istanbul Technical University, Chemical and Metallurgical Engineering Faculty, Food Engineering Department, Ayazağa Campus, Maslak 34469, Istanbul, Turkey.
- Bioactive Research & Innovation Food Manufac. Indust. Trade Ltd., Katar Street, Teknokent ARI-3, B110, Sarıyer 34467, Istanbul, Turkey.
| | - Navid Baghalpour
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran 11369, Iran.
| | - Javad Sharifi-Rad
- Zabol Medicinal Plants Research Center, Zabol University of Medical Sciences, Zabol 61615-585, Iran.
| | - Patrick Valere Tsouh Fokou
- Antimicrobial and Biocontrol Agents Unit, Department of Biochemistry, Faculty of Science, University of Yaounde 1, Ngoa Ekelle, Annex Fac. Sci, Yaounde 812, Cameroon.
| | - William C Cho
- Department of Clinical Oncology, Queen Elizabeth Hospital, 30 Gascoigne Road, Hong Kong, China.
| | - Natália Martins
- Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal.
- Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal.
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Salehi B, Sharopov F, Boyunegmez Tumer T, Ozleyen A, Rodríguez-Pérez C, Ezzat SM, Azzini E, Hosseinabadi T, Butnariu M, Sarac I, Bostan C, Acharya K, Sen S, Nur Kasapoglu K, Daşkaya-Dikmen C, Özçelik B, Baghalpour N, Sharifi-Rad J, Valere Tsouh Fokou P, Cho WC, Martins N. Symphytum Species: A Comprehensive Review on Chemical Composition, Food Applications and Phytopharmacology. Molecules 2019; 24:E2272. [PMID: 31216776 PMCID: PMC6631335 DOI: 10.3390/molecules24122272] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/05/2019] [Accepted: 06/11/2019] [Indexed: 12/20/2022] Open
Abstract
Symphytum species belongs to the Boraginaceae family and have been used for centuries for bone breakages, sprains and rheumatism, liver problems, gastritis, ulcers, skin problems, joint pain and contusions, wounds, gout, hematomas and thrombophlebitis. Considering the innumerable potentialities of the Symphytum species and their widespread use in the world, it is extremely important to provide data compiling the available literature to identify the areas of intense research and the main gaps in order to design future studies. The present review aims at summarizing the main data on the therapeutic indications of the Symphytum species based on the current evidence, also emphasizing data on both the efficacy and adverse effects. The present review was carried out by consulting PubMed (Medline), Web of Science, Embase, Scopus, Cochrane Database, Science Direct and Google Scholar (as a search engine) databases to retrieve the most updated articles on this topic. All articles were carefully analyzed by the authors to assess their strengths and weaknesses, and to select the most useful ones for the purpose of review, prioritizing articles published from 1956 to 2018. The pharmacological effects of the Symphytum species are attributed to several chemical compounds, among them allantoin, phenolic compounds, glycopeptides, polysaccharides and some toxic pyrrolizidine alkaloids. Not less important to highlight are the risks associated with its use. In fact, there is increasing consumption of over-the-counter drugs, which when associated with conventional drugs can cause serious and even fatal adverse events. Although clinical trials sustain the folk topical application of Symphytum species in musculoskeletal and blunt injuries, with minor adverse effects, its antimicrobial potency was still poorly investigated. Further studies are needed to assess the antimicrobial spectrum of Symphytum species and to characterize the active molecules both in vitro and in vivo.
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Affiliation(s)
- Bahare Salehi
- Student Research Committee, School of Medicine, Bam University of Medical Sciences, Bam 44340847, Iran.
| | - Farukh Sharopov
- Department of Pharmaceutical Technology, Avicenna Tajik State Medical University, Rudaki 139, Dushanbe 734003, Tajikistan.
| | - Tugba Boyunegmez Tumer
- Department of Molecular Biology and Genetics, Faculty of Arts and Science, Canakkale Onsekiz Mart University, Canakkale 17020, Turkey.
| | - Adem Ozleyen
- Graduate Program of Biomolecular Sciences, Institute of Natural and Applied Sciences, Canakkale Onsekiz Mart University, Canakkale 17020, Turkey.
| | - Celia Rodríguez-Pérez
- Department of Nutrition and Food Science, University of Granada, Campus of Cartuja, E-18071 Granada, Spain.
- Institute of Nutrition and Food Technology (INYTA) 'José Mataix', Biomedical Research Centre, University of Granada, Avenida del Conocimiento s/n, E-18071 Granada, Spain.
| | - Shahira M Ezzat
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr El-Ainy Street, Cairo 11562, Egypt.
- Department of Pharmacognosy, Faculty of Pharmacy, October University for Modern Science and Arts (MSA), 6th October City 12566, Egypt.
| | - Elena Azzini
- Centre for Research on Food and Nutrition, Council for Agricultural Research and Economics, Rome 546-00178 , Italy.
| | - Tahereh Hosseinabadi
- Department of Pharmacognosy and Biotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran 11369, Iran.
| | - Monica Butnariu
- Banat's University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara, 300645 Calea Aradului 119, Timis, Romania.
| | - Ioan Sarac
- Banat's University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara, 300645 Calea Aradului 119, Timis, Romania.
| | - Cristian Bostan
- Banat's University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara, 300645 Calea Aradului 119, Timis, Romania.
| | - Krishnendu Acharya
- Molecular and Applied Mycology and Plant Pathology Laboratory, Department of Botany, University of Calcutta, Kolkata 700019, India.
| | - Surjit Sen
- Molecular and Applied Mycology and Plant Pathology Laboratory, Department of Botany, University of Calcutta, Kolkata 700019, India.
- Department of Botany, Fakir Chand College, Diamond Harbour, West Bengal 743331, India.
| | - Kadriye Nur Kasapoglu
- Istanbul Technical University, Chemical and Metallurgical Engineering Faculty, Food Engineering Department, Ayazağa Campus, Maslak 34469, Istanbul, Turkey.
| | - Ceren Daşkaya-Dikmen
- Istanbul Technical University, Chemical and Metallurgical Engineering Faculty, Food Engineering Department, Ayazağa Campus, Maslak 34469, Istanbul, Turkey.
- Istanbul Gedik University, Department of Gastronomy and Culinary Arts, 34876 Kartal, Istanbul, Turkey.
| | - Beraat Özçelik
- Istanbul Technical University, Chemical and Metallurgical Engineering Faculty, Food Engineering Department, Ayazağa Campus, Maslak 34469, Istanbul, Turkey.
- Bioactive Research & Innovation Food Manufac. Indust. Trade Ltd., Katar Street, Teknokent ARI-3, B110, Sarıyer 34467, Istanbul, Turkey.
| | - Navid Baghalpour
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran 11369, Iran.
| | - Javad Sharifi-Rad
- Zabol Medicinal Plants Research Center, Zabol University of Medical Sciences, Zabol 61615-585, Iran.
| | - Patrick Valere Tsouh Fokou
- Antimicrobial and Biocontrol Agents Unit, Department of Biochemistry, Faculty of Science, University of Yaounde 1, Ngoa Ekelle, Annex Fac. Sci, Yaounde 812, Cameroon.
| | - William C Cho
- Department of Clinical Oncology, Queen Elizabeth Hospital, 30 Gascoigne Road, Hong Kong, China.
| | - Natália Martins
- Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal.
- Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal.
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Oltean H, Robbins C, van Tulder MW, Berman BM, Bombardier C, Gagnier JJ. Herbal medicine for low-back pain. Cochrane Database Syst Rev 2014; 2014:CD004504. [PMID: 25536022 PMCID: PMC7197042 DOI: 10.1002/14651858.cd004504.pub4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Low-back pain (LBP) is a common condition and imposes a substantial economic burden upon people living in industrialized societies. A large proportion of people with chronic LBP use complementary and alternative medicine (CAM), visit CAM practitioners, or both. Several herbal medicines have been purported for use in treating people with LBP. This is an update of a Cochrane Review first published in 2006. OBJECTIVES To determine the effectiveness of herbal medicine for non-specific LBP. SEARCH METHODS We searched the following electronic databases up to September 2014: MEDLINE, EMBASE, CENTRAL, CINAHL, Clinical Trials.gov, World Health Organization International Clinical Trials Registry Portal and PubMed; checked reference lists in review articles, guidelines and retrieved trials; and personally contacted individuals with expertise in this area. SELECTION CRITERIA We included randomized controlled trials (RCTs) examining adults (over 18 years of age) suffering from acute, sub-acute, or chronic non-specific LBP. The interventions were herbal medicines which we defined as plants used for medicinal purposes in any form. Primary outcome measures were pain and function. DATA COLLECTION AND ANALYSIS A library scientist with the Cochrane Back Review Group conducted the database searches. One review author contacted content experts and acquired relevant citations. We downloaded full references and abstracts of the identified studies and retrieved a hard copy of each study for final inclusion decisions. Two review authors assessed risk of bias, GRADE criteria (GRADE 2004), and CONSORT compliance and a random subset were compared to assessments by a third individual. Two review authors assessed clinical relevance and resolved any disagreements by consensus. MAIN RESULTS We included 14 RCTs (2050 participants) in this review. One trial on Solidago chilensis M. (Brazilian arnica) (20 participants) found very low quality evidence of reduction in perception of pain and improved flexibility with application of Brazilian arnica-containing gel twice daily as compared to placebo gel. Capsicum frutescens cream or plaster probably produces more favourable results than placebo in people with chronic LBP (three trials, 755 participants, moderate quality evidence). Based on current evidence, it is not clear whether topical capsicum cream is more beneficial for treating people with acute LBP compared to placebo (one trial, 40 participants, low quality evidence). Another trial found equivalence of C. frutescens cream to a homeopathic ointment (one trial, 161 participants, very low quality evidence). Daily doses of Harpagophytum procumbens (devil's claw), standardized to 50 mg or 100 mg harpagoside, may be better than placebo for short-term improvements in pain and may reduce use of rescue medication (two trials, 315 participants, low quality evidence). Another H. procumbens trial demonstrated relative equivalence to 12.5 mg per day of rofecoxib (Vioxx®) but was of very low quality (one trial, 88 participants, very low quality). Daily doses of Salix alba (white willow bark), standardized to 120 mg or 240 mg salicin, are probably better than placebo for short-term improvements in pain and rescue medication (two trials, 261 participants, moderate quality evidence). An additional trial demonstrated relative equivalence to 12.5 mg per day of rofecoxib (one trial, 228 participants) but was graded as very low quality evidence. S. alba minimally affected platelet thrombosis versus a cardioprotective dose of acetylsalicylate (one trial, 51 participants). One trial (120 participants) examining Symphytum officinale L. (comfrey root extract) found low quality evidence that a Kytta-Salbe comfrey extract ointment is better than placebo ointment for short-term improvements in pain as assessed by VAS. Aromatic lavender essential oil applied by acupressure may reduce subjective pain intensity and improve lateral spine flexion and walking time compared to untreated participants (one trial, 61 participants,very low quality evidence). No significant adverse events were noted within the included trials. AUTHORS' CONCLUSIONS C. frutescens (Cayenne) reduces pain more than placebo. Although H. procumbens, S. alba, S. officinale L., S. chilensis, and lavender essential oil also seem to reduce pain more than placebo, evidence for these substances was of moderate quality at best. Additional well-designed large trials are needed to test these herbal medicines against standard treatments. In general, the completeness of reporting in these trials was poor. Trialists should refer to the CONSORT statement extension for reporting trials of herbal medicine interventions.
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Affiliation(s)
- Hanna Oltean
- University of MichiganDepartment of Orthopaedic Surgery24 Frank Lloyd Wright DrAnn ArborMIUSA48106
| | - Chris Robbins
- University of MichiganDepartment of Orthopaedic Surgery24 Frank Lloyd Wright DrAnn ArborMIUSA48106
| | - Maurits W van Tulder
- VU UniversityDepartment of Health Sciences, Faculty of Earth and Life SciencesPO Box 7057Room U454AmsterdamNetherlands1007 MB
| | - Brian M Berman
- University of Maryland School of MedicineCenter for Integrative Medicine520 W. Lombard St2nd FloorBaltimoreMarylandUSA21201
| | - Claire Bombardier
- Institute for Work & Health481 University Avenue, Suite 800TorontoONCanadaM5G 2E9
| | - Joel J Gagnier
- University of MichiganDepartment of Epidemiology, School of Public Health1415 Washington HeightsRm M5158Ann ArborMIUSA48109‐2029
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Glickman-Simon R, Mukherji A. Moxibustion for asthma, acupuncture for epilepsy, psychological therapies for irritable bowel syndrome, exercise training for multiple sclerosis, and comfrey root for acute back pain. Explore (NY) 2014; 11:67-71. [PMID: 25435497 DOI: 10.1016/j.explore.2014.10.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Cheng CC, Chou CY, Chang YC, Wang HW, Wen CC, Chen YH. Protective Role of Comfrey Leave Extracts on UV-induced Zebrafish Fin Damage. J Toxicol Pathol 2014; 27:115-21. [PMID: 25352712 PMCID: PMC4110935 DOI: 10.1293/tox.2013-0053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Accepted: 01/25/2014] [Indexed: 11/30/2022] Open
Abstract
In zebrafish, UV exposure leads to fin malformation phenotypes including fin reduction
or absence. The present study evaluated UV-protective activities of comfrey leaves
extracts in a zebrafish model by recording fin morphological changes. Chemopreventive
effects of comfrey leave extracts were evaluated using Kaplan-Meier analysis and Cox
proportional hazards regression. The results showed that (1) the mean times of return to
normal fin in the UV+comfrey (50 and 100 ppm) groups were 3.43 and 2.86 days and were
quicker compared with that in the UV only group (4.21 days); (2) zebrafish fins in the
UV+comfrey (50 and 100 ppm) groups were 2.05 and 3.25 times more likely to return to
normal than those in the UV only group; and (3) comfrey leave extracts had UV-absorbance
abilities and significantly reduced ROS production in UV-exposed zebrafish embryos, which
may attenuate UV-mediated apoptosis. In conclusion, comfrey leaves extracts may have the
potential to be developed as UV-protective agents to protect zebrafish embryos from
UV-induced damage.
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Affiliation(s)
- Chien-Chung Cheng
- Department of Applied Chemistry, National Chia-Yi University, Chia-Yi City, Taiwan
| | - Chi-Yuan Chou
- Department of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei, Taiwan
| | - Yao-Chin Chang
- Department of Chemistry, Tamkang University, No. 151 Ying-chuan Road, Tamsui, New Taipei City, Taiwan
| | - Hsuan-Wen Wang
- Department of Applied Chemistry, National Chia-Yi University, Chia-Yi City, Taiwan
| | - Chi-Chung Wen
- Department of Mathematics, Tamkang University, Tamsui, Taiwan
| | - Yau-Hung Chen
- Department of Chemistry, Tamkang University, No. 151 Ying-chuan Road, Tamsui, New Taipei City, Taiwan
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Staiger C. Comfrey root: from tradition to modern clinical trials. Wien Med Wochenschr 2012; 163:58-64. [PMID: 23224633 PMCID: PMC3580139 DOI: 10.1007/s10354-012-0162-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 10/25/2012] [Indexed: 12/04/2022]
Abstract
Comfrey (Symphytum officinale L.) has been used over many centuries as a medicinal plant. In particular, the use of the root has a longstanding tradition. Today, several randomised controlled trials have demonstrated the efficacy and safety. Comfrey root extract has been used for the topical treatment of painful muscle and joint complaints. It is clinically proven to relieve pain, inflammation and swelling of muscles and joints in the case of degenerative arthritis, acute myalgia in the back, sprains, contusions and strains after sports injuries and accidents, also in children aged 3 years and older. This paper provides information on clinical trials, non-interventional studies and further literature published on comfrey root till date.
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