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Tiwari S, Acharya P, Solanki B, Sharma AK, Rawat S. A review on efforts for improvement in medicinally important chemical constituents in Aconitum through biotechnological interventions. 3 Biotech 2023; 13:190. [PMID: 37193333 PMCID: PMC10183062 DOI: 10.1007/s13205-023-03578-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 04/21/2023] [Indexed: 05/18/2023] Open
Abstract
The genus Aconitum belongs to the family Ranunculaceae, is endowed with more than 350 species on the earth. Medicinally important aconitine type of diterpenoid alkaloids are the characteristic compounds in most of the Aconitum species. The present review endeavored the major research carried out in the field of genetic resource characterization, pharmacological properties, phytochemistry, major factors influencing quantity, biosynthetic pathways and processing methods for recovery of active ingredients, variety improvement, propagation methods, and important metabolite production through cell/organ culture of various Aconitum species. More than 450 derivatives of aconitine-type C19 and C20-diterpenoid alkaloids along with a few other non-alkaloidal compounds, such as phenylpropanoids, flavonoids, terpenoids, and fatty acids, have been identified in the genus. A few Aconitum species and their common diterpenoid alkaloid compounds are also well characterized for analgesic, inflammatory and cytotoxic properties. However, the different isolated compound needs to be validated for supporting other traditional therapeutical uses of the plant species. Aconitine alkaloids shared common biosynthesis pathway, but their diversification mechanism remains unexplored in the genus. Furthermore, the process needs to be developed on secondary metabolite recovery, mass-scale propagation methods, and agro-technologies for maintaining the quality of products. Many species are losing their existence in nature due to over-exploitation or anthropogenic factors; thus, temporal monitoring of the population status in its habitat, and suitable management programs for ascertaining conservation needs to be developed.
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Affiliation(s)
- Sekhar Tiwari
- Department of Biotechnology, School of Sciences, P. P. Savani University, Surat, Gujarat India
| | - Puja Acharya
- Sikkim Regional Centre, G. B. Pant National Institute of Himalayan Environment, Pangthang, Gangtok, Sikkim India
| | - Bharat Solanki
- Department of Biochemistry, M. B. Patel Science College, Sardar Patel University, Anand, Gujarat India
| | - Anish Kumar Sharma
- Department of Biotechnology, School of Sciences, P. P. Savani University, Surat, Gujarat India
| | - Sandeep Rawat
- Sikkim Regional Centre, G. B. Pant National Institute of Himalayan Environment, Pangthang, Gangtok, Sikkim India
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Hu J, Wu Q, Li Q, Lv T, Peng TF, Yin S, Jin HZ. Antinociceptive diterpenoid alkaloids from the roots of Aconitum austroyunnanense. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2023; 25:132-138. [PMID: 35574919 DOI: 10.1080/10286020.2022.2070483] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 04/21/2022] [Accepted: 04/22/2022] [Indexed: 06/15/2023]
Abstract
A phytochemical investigation on the roots of Aconitum austroyunnanense afforded three undescribed aconitine-type C19-diterpenoid alkaloids, austroyunnanines A-C (1-3). Structural elucidation of all the compounds were performed by spectral methods such as 1 D and 2 D (1H-1H COSY, HMQC, and HMBC) NMR spectroscopy. The isolated alkaloids were tested in vivo for their antinociceptive properties. Consequently, austroyunnanine B (2) exhibited significant antinociceptive effect and its ID50 value (48.0 μmol/kg) was 2-fold less than those of the positive control drugs aspirin and acetaminophen.
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Affiliation(s)
- Jiang Hu
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Qiong Wu
- Department of Pharmacy, General Hospital of Southern Theatre Command, Guangzhou 510010, China
| | - Qiang Li
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Tao Lv
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Tian-Feng Peng
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Si Yin
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Hong-Zhou Jin
- Laboratory of Basic Medicine, General Hospital of Northern Theatre Command, Shenyang 110016, China
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3
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Hu J, Li SF, Li Q, Lv T, Peng TF, Yin S, Min Y. Antinociceptive C 19-diterpenoid alkaloids from the roots of Aconitum nagarum. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2022:1-7. [PMID: 35947033 DOI: 10.1080/10286020.2022.2109148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 07/31/2022] [Accepted: 07/31/2022] [Indexed: 06/15/2023]
Abstract
Three new C19-diterpenoid alkaloids, nagarumines A-C (1-3), together two known alkaloids, deoxyaconitine (4) and N-deethyldeoxyaconitine (5), were isolated from the roots of Aconitum nagarum. The structures of the new compounds were elucidated by spectral methods such as 1D and 2D (1H-1H COSY, HMQC, and HMBC) NMR spectroscopy, as well as high resolution mass spectrometry. The in vivo pharmacological studies revealed that nagarumine C (3) possessed comparable antinociceptive activity (ED50 = 76.0 μmol/kg) with the positive control drugs aspirin and acetaminophen.
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Affiliation(s)
- Jiang Hu
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Shi-Fu Li
- Department of Pharmacy, Qujing Maternal and Chile Health Hospital, Qujing 655000, China
| | - Qiang Li
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Tao Lv
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Tian-Feng Peng
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Si Yin
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Ying Min
- Department of Stomatology, General Hospital of Northern Theatre Command, Shenyang 110016, China
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4
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Zhang L, Miao X, Li Y, Hu F, Ma D, Zhang Z, Sun Q, Zhu Y, Zhu Q. Traditional processing, uses, phytochemistry, pharmacology and toxicology of Aconitum sinomontanum Nakai: A comprehensive review. JOURNAL OF ETHNOPHARMACOLOGY 2022; 293:115317. [PMID: 35469829 DOI: 10.1016/j.jep.2022.115317] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 04/07/2022] [Accepted: 04/19/2022] [Indexed: 06/14/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE As a folk medicine, Aconitum sinomontanum Nakai (Ranunculaceae) a perennial herbaceous flowering plant, is a widely used traditional Chinese medicine. Its rhizomes and roots are known as 'Gaowutou' in China, and it has been traditionally used for the treatment of rheumatoid arthritis, painful swelling of joints, bruises and injuries and has been known to grow well in regions of high altitude such as Gansu, Tibet etc. THE AIM OF THE REVIEW: This systematic review the comprehensive knowledge of the A. sinomontanum, including its traditional processing and uses, chemical constituents, pharmacological activities, toxicity assessment, pharmacokinetics and metabolism, and its use in clinical settings to emphasize the benefits of this species. We also discuss expectations for prospective research and implementation of this herb. This work lays a solid foundation for further development of A. sinomontanum. MATERIALS AND METHOD Information on the studies of A. sinomontanum was collected from scientific journals, books, and reports via library and electronic data search (PubMed, Elsevier, Scopus, Google Scholar, Springer, Science Direct, Wiley, ACS, EMBASE, Web of Science and CNKI). Meanwhile, it was also obtained from published works of material medica, folk records, ethnopharmacological literatures, Ph.D. and Masters dissertation. RESULTS As a member of the Ranunculaceae family, A. sinomontanum possesses its up-and-coming biological characteristics. It is widely reported for treating rheumatoid arthritis, painful swelling of joints, bruises and injuries. Currently, over 71 phytochemical ingredients have been obtained and identified from different parts of A. sinomontanum. Among them, alkaloids, flavonoids, steroids, glycosides are the major bioactive constituents. Activities such as antinociceptive, anti-inflammatory, antitumor, antiarrhythmic, local anesthetic, antipyretic, antimicrobial, insecticidal and others have been corroborated in vivo and in vitro. These properties are attributed to different alkaloids. In addition, many of the active ingredients, such as lappaconitine, ranaconitine and total alkaloids have been used as quality markers. CONCLUSION This work contributes to update the ethnopharmacological uses, chemical constituents, pharmacological activities, toxicity assessment, pharmacokinetics and metabolism, and clinical settings information for A. sinomontanum, which provide basic information to help better understand the pharmacological and toxicological activities of A. sinomontanum in human. However, further in-depth studies are needed to determine the medical uses of this herb and its chemical constituents, pharmacological activities, clinical applications and toxicology.
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Affiliation(s)
- Lijun Zhang
- College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, 730000, PR China; Ankang Inspection and Detection Center of Food and Drug Control, Ankang, 725000, PR China
| | - Xiaolou Miao
- Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences, Lanzhou, 730050, PR China.
| | - Yun Li
- College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, 730000, PR China.
| | - Fangdi Hu
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, PR China
| | - Dongni Ma
- College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, 730000, PR China; Pharmacy Department, Dunhuang Hospital of Gansu Province, Dunhuang, 736200, PR China
| | - Zhuanping Zhang
- Ankang Inspection and Detection Center of Food and Drug Control, Ankang, 725000, PR China
| | - Quanming Sun
- Ankang Inspection and Detection Center of Food and Drug Control, Ankang, 725000, PR China
| | - Yuanfeng Zhu
- Ankang Inspection and Detection Center of Food and Drug Control, Ankang, 725000, PR China
| | - Qingli Zhu
- Ankang Inspection and Detection Center of Food and Drug Control, Ankang, 725000, PR China
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Hu J, Li JX, Li Q, Mao X, Peng TF, Liu HQ, Yin S, Yuan HJ. Antinociceptive C 19-diterpenoid alkaloids from the root of Aconitum episcopale. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2022; 24:617-623. [PMID: 34304653 DOI: 10.1080/10286020.2021.1956907] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 07/13/2021] [Indexed: 06/13/2023]
Abstract
A chemical investigation on the roots of Aconitum episcopale afforded three undescribed aconitine-type C19-diterpenoid alkaloids, episcopalines A-C (1-3). The structures of the new compounds were elucidated by spectroscopic analysis (NMR, IR, UV, and MS). The isolated alkaloids were tested in vivo for their antinociceptive properties. As a result, episcopaline B (2) showed potent antinociceptive effect and its ID50 value (55.0 μmol/kg) was 2-fold less than those of the positive control drugs aspirin and acetaminophen.
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Affiliation(s)
- Jiang Hu
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Jia-Xun Li
- Tumor Hospital of Yunnan Province, The Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - Qiang Li
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Xia Mao
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Tian-Feng Peng
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Hui-Qing Liu
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Si Yin
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Hong-Jie Yuan
- Department of Outpatient, General Hospital of Northern Theater Command, Shenyang 110000, China
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6
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Antinociceptive Diterpenoid Alkaloids from the Roots of Aconitum pseudostapfianum. Chem Nat Compd 2022. [DOI: 10.1007/s10600-022-03666-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Guo C, He L, Hu N, Zhao X, Gong L, Wang C, Peng C, Li Y. Aconiti Lateralis Radix Praeparata lipid-soluble alkaloids alleviates IL-1β-induced inflammation of human fibroblast-like synoviocytes in rheumatoid arthritis by inhibiting NF-κB and MAPKs signaling pathways and inducing apoptosis. Cytokine 2022; 151:155809. [DOI: 10.1016/j.cyto.2022.155809] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 12/06/2021] [Accepted: 01/14/2022] [Indexed: 01/03/2023]
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8
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Ren Z, Zhang H, Wang Z, Chen X, Yang L, Jiang H. Progress in Immunoassays of Toxic Alkaloids in Plant-Derived Medicines: A Review. Toxins (Basel) 2022; 14:toxins14030165. [PMID: 35324662 PMCID: PMC8948709 DOI: 10.3390/toxins14030165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/14/2022] [Accepted: 02/21/2022] [Indexed: 02/04/2023] Open
Abstract
Plants are the cradle of the traditional medicine system, assuaging human or animal diseases, and promoting health for thousands of years. However, many plant-derived medicines contain toxic alkaloids of varying degrees of toxicity that pose a direct or indirect threat to human and animal health through accidental ingestion, misuse of plant materials, or through the food chain. Thus, rapid, easy, and sensitive methods are needed to effectively screen these toxic alkaloids to guarantee the safety of plant-derived medicines. Antibodies, due to their inherent specificity and high affinity, have been used as a variety of analytical tools and techniques. This review describes the antigen synthesis and antibody preparation of the common toxic alkaloids in plant-derived medicines and discusses the advances of antibody-based immunoassays in the screening and detection of toxic alkaloids in plants or other related matrices. Finally, the limitations and prospects of immunoassays for toxic alkaloids are discussed.
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9
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Chan YT, Wang N, Feng Y. The toxicology and detoxification of Aconitum: traditional and modern views. Chin Med 2021; 16:61. [PMID: 34315520 PMCID: PMC8314510 DOI: 10.1186/s13020-021-00472-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 07/16/2021] [Indexed: 01/23/2023] Open
Abstract
Aconitum carmichaeli Debx.-derived herbal medicine has been used for anti-inflammation and anti-arrhythmia purpose for more than two thousand years. It is processed into Chuanwu (Radix Aconiti praeparata) and Fuzi (Radix Aconiti lateralis praeparata) in Traditional Chinese Medicine, which are two useful drugs but with toxic properties. There have been patients poisoned by accidental ingestion of Aconitum plants or misuse of the herbal drug, and this is of great concern to study in-depth. In this review, we provided the traditional and contemporary practice of using Aconitum herbs as medicine, from functions, processing methods to toxicity in ethnomedicine aspects to discuss the underlying connections of traditional and modern understanding on the toxicity of Aconitum plants. We summarized the functions and toxicology of the herbal drugs are analyzed from chemical and clinical aspects, with the help of traditional and modern knowledge of medicine. The medicinal doses and lethal doses determined by researches are summarized, and the usage and processing methods are updated and reviewed in the modern view. In addition, clinical management of poisoned cases using western medicine is discussed. This review provides insights and awareness of safety when using Aconitum-derived herbal medicine, and the application of modern scientific knowledge to optimize the detoxification processes. We suggest the possibility to renew the current standard processing method from the official Pharmacopoeia all over the world.
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Affiliation(s)
- Yau-Tuen Chan
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, China
| | - Ning Wang
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, China.
| | - Yibin Feng
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, China.
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10
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Hu J, Li JX, Li Q, Mao X, Peng TF, Jin NH, Yin S, Tang Y. Antinociceptive C 19-diterpenoid alkaloids isolated from Aconitum pseudostapfianum. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2021; 23:637-643. [PMID: 33583282 DOI: 10.1080/10286020.2021.1886091] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Accepted: 02/02/2021] [Indexed: 06/12/2023]
Abstract
Phytochemical investigation on the roots of Aconitum pseudostapfianum resulted in the isolation of three new aconitine-type C19-diterpenoid alkaloids, pseudostapines A-C (1-3). Their structures were determined by spectral methods such as 1D and 2D (1H-1H COSY, HMQC, NOESY and HMBC) NMR spectroscopy, in addition to high resolution mass spectrometry. The isolated alkaloids were tested in vivo for their antinociceptive potential. As a result, pseudostapine C (3) showed 2-fold more potent antinociceptive effect (ID50 = 60.3 μmol/kg) than the positive control drugs aspirin and acetaminophen.
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Affiliation(s)
- Jiang Hu
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Jia-Xun Li
- Tumor Hospital of Yunnan Province, The Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - Qiang Li
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Xia Mao
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Tian-Feng Peng
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Nian-Hua Jin
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Si Yin
- College of Biological Resources and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Ying Tang
- Department of Quality Management, General Hospital of Northern Theater Command,, Shenyang, 110015, China
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Ali S, Chouhan R, Sultan P, Hassan QP, Gandhi SG. A comprehensive review of phytochemistry, pharmacology and toxicology of the genus Aconitum L. ADVANCES IN TRADITIONAL MEDICINE 2021. [DOI: 10.1007/s13596-021-00565-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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12
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Wang J, Meng XH, Chai T, Yang JL, Shi YP. Diterpenoid Alkaloids and One Lignan from the Roots of Aconitum pendulum Busch. NATURAL PRODUCTS AND BIOPROSPECTING 2019; 9:419-423. [PMID: 31728851 PMCID: PMC6872700 DOI: 10.1007/s13659-019-00227-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 11/07/2019] [Indexed: 05/19/2023]
Abstract
Diterpenoid alkaloids have neroprotective activity. Herein, three napelline-type diterpenoid alkaloids 1-3, two aconitine-type diterpenoid alkaloids 4-5, and one isoquinline-type alkaloid 6, as well as one lignan glycoside 7, have been isolated from the roots of Aconitum pendulum Busch. Compounds 1 and 7 were new compounds, and their chemical structures were determined on the basis of nuclear magnetic resonance (NMR) spectra and mass spectrometry analysis. A ThT assay revealed that compound 2 showed significant disaggregation potency on the Aβ1-42 aggregates.
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Affiliation(s)
- Jun Wang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People's Republic of China
| | - Xian-Hua Meng
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People's Republic of China
| | - Tian Chai
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People's Republic of China
| | - Jun-Li Yang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People's Republic of China.
| | - Yan-Ping Shi
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People's Republic of China.
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13
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Zihad SMNK, Bhowmick N, Uddin SJ, Sifat N, Rahman MS, Rouf R, Islam MT, Dev S, Hazni H, Aziz S, Ali ES, Das AK, Shilpi JA, Nahar L, Sarker SD. Analgesic Activity, Chemical Profiling and Computational Study on Chrysopogon aciculatus. Front Pharmacol 2018; 9:1164. [PMID: 30374304 PMCID: PMC6196237 DOI: 10.3389/fphar.2018.01164] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 09/25/2018] [Indexed: 11/24/2022] Open
Abstract
Present study was undertaken to evaluate the analgesic activity of the ethanol extract of Chrysopogon aciculatus. In addition to bioassays in mice, chemical profiling was done by LC-MS and GC-MS to identify phytochemicals, which were further docked on the catalytic site of COX-2 enzymes with a view to suggest the possible role of such phytoconstituents in the observed analgesic activity. Analgesic activity of C. aciculatus was evaluated by acetic acid induced writhing reflex method and hot plate technique. Phytochemical profiling was conducted using liquid chromatography mass spectrometry (LC-MS) and gas chromatography mass spectrometry (GC-MS). In docking studies, homology model of human COX-2 enzyme was prepared using Easy Modeler 4.0 and the identified phytoconstituents were docked using Autodock Vina. Preliminary acute toxicity test of the ethanol extract of C. aciculatus showed no sign of mortality at the highest dose of 4,000 mg/kg. The whole plant extract significantly (p < 0.05) inhibited acetic acid induced writhing in mice at the doses of 500 and 750 mg/kg. The extract delayed the response time in hot plate test in a dose dependent manner. LC-MS analysis of the plant extract revealed the presence of aciculatin, nudaphantin and 5α,8α-epidioxyergosta-6,22-diene-3β-ol. Three compounds namely citronellylisobutyrate; 2,4-dihydroxy-7-methoxy-(2H)-1,4-benzoxazin-3(4H)-one and nudaphantin were identified in the n-hexane fraction by GC-MS. Among these compounds, six were found to be interacting with the binding site for arachidonic acid in COX-2 enzyme. Present study strongly supports the traditional use of C. aciculatus in the management of pain. In conclusion, compounds (tricin, campesterol, gamma oryzanol, and citronellyl isobutyrate) showing promising binding affinity in docking studies, along with previously known anti-inflammatory compound aciculatin can be held responsible for the observed activity.
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Affiliation(s)
| | - Niloy Bhowmick
- Pharmacy Discipline, Life Science School, Khulna University, Khulna, Bangladesh
| | - Shaikh Jamal Uddin
- Pharmacy Discipline, Life Science School, Khulna University, Khulna, Bangladesh
| | - Nazifa Sifat
- Pharmacy Discipline, Life Science School, Khulna University, Khulna, Bangladesh
| | - Md Shamim Rahman
- Biotechnology and Genetic Engineering Discipline, Life Science School, Khulna University, Khulna, Bangladesh
| | - Razina Rouf
- Department of Pharmacy, Faculty of Life Science, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj, Bangladesh
| | - Muhammad Torequl Islam
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam.,Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Shrabanti Dev
- Pharmacy Discipline, Life Science School, Khulna University, Khulna, Bangladesh
| | - Hazrina Hazni
- Centre for Natural Products and Drug Discovery, University of Malaya, Kuala Lumpur, Malaysia
| | - Shahin Aziz
- Chemical Research Division, Bangladesh Council of Scientific and Industrial Research, Dhaka, Bangladesh
| | - Eunüs S Ali
- Department of Biochemistry and Molecular Genetics, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Asish K Das
- Pharmacy Discipline, Life Science School, Khulna University, Khulna, Bangladesh
| | - Jamil A Shilpi
- Pharmacy Discipline, Life Science School, Khulna University, Khulna, Bangladesh
| | - Lutfun Nahar
- Medicinal Chemistry and Natural Products Research Group, School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Satyajit D Sarker
- Medicinal Chemistry and Natural Products Research Group, School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool, United Kingdom
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14
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The Effects of Rheum palmatum L. on the Pharmacokinetic of Major Diterpene Alkaloids of Aconitum carmichaelii Debx. in Rats. Eur J Drug Metab Pharmacokinet 2018; 42:441-451. [PMID: 27357588 DOI: 10.1007/s13318-016-0356-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND AND OBJECTIVES Aconitum carmichaelii Debx. (Fuzi) is usually compatible with Rheum palmatum L. (Dahuang) in clinic. The study is conducted to investigate the influence of Dahuang on the pharmacokinetics of Fuzi. METHODS Twelve rats were randomly divided into two groups. Fuzi group was orally administered a single dose of 38.4 mg/kg total alkaloids from Fuzi, and Fuzi-Dahuang group was given 38.4 mg/kg total alkaloids from Fuzi and 76.8 mg/kg Dahuang anthraquinones at the same time. The plasma concentrations of aconitine (AC), mesaconitine (MC), and hypaconitine (HC), benzoylaconine (BAC), benzoylmesaconine (BMC), benzoylhypaconine (BHC), and aconine (ACN) were determined by ultra-performance liquid chromatography-quadrupole time of flight mass spectrometry method. The pharmacokinetic parameters were calculated including maximum plasma concentration (C max), area under the plasma concentration-time curve in all time-points (AUClast), apparent volume of distribution (V z/F), apparent plasma clearance (CL/F), elimination half-life (T 1/2), and time to achieve maximum concentration (T max). RESULTS AUClast of diester diterpene alkaloids (DDAs) were 58.20, 169.78, 278.48 ng·h/mL for AC, MC, and HC in Fuzi-Dahuang group which were remarkably lower than that in Fuzi group (71.62, 183.13, 410.59 ng·h/mL for AC, MC, HC). CL/F was significantly increased from 173.88 to 218.85 mL/h for AC, 433.22 to 800.21 mL/h for MC, 1150.61 to 1307.30 mL/h for HC after combination. However, with the significantly increased C max, AUClast of monoester diterpene alkaloids (MDAs) and amine diterpenoid alkaloids (ADAs) were 152.42, 1238.95, 287.96, 123.33 ng·h/mL for BAC, BHC, BMC, ACN in Fuzi-Dahuang group which were remarkably higher than that in Fuzi group (54.47, 1105.48, 200.75, 86.48 ng·h/mL for BAC, BHC, BMC, ACN). At the same time, CL/F was significantly decreased from 1030.15 to 607.09, 3594.06 to 1437.54, 1441.23 to 1310.14, and 391.30 to 239.50 mL/h for each one after combination. CONCLUSIONS Fuzi diterpene alkaloids pharmacokinetics was greatly influenced by Dahuang which may account for the compatibility mechanism of effect-enhancing and toxicity-reducing.
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Bellera CL, Di Ianni ME, Talevi A. The application of molecular topology for ulcerative colitis drug discovery. Expert Opin Drug Discov 2017; 13:89-101. [PMID: 29088918 DOI: 10.1080/17460441.2018.1396314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Although the therapeutic arsenal against ulcerative colitis has greatly expanded (including the revolutionary advent of biologics), there remain patients who are refractory to current medications while the safety of the available therapeutics could also be improved. Molecular topology provides a theoretic framework for the discovery of new therapeutic agents in a very efficient manner, and its applications in the field of ulcerative colitis have slowly begun to flourish. Areas covered: After discussing the basics of molecular topology, the authors review QSAR models focusing on validated targets for the treatment of ulcerative colitis, entirely or partially based on topological descriptors. Expert opinion: The application of molecular topology to ulcerative colitis drug discovery is still very limited, and many of the existing reports seem to be strictly theoretic, with no experimental validation or practical applications. Interestingly, mechanism-independent models based on phenotypic responses have recently been reported. Such models are in agreement with the recent interest raised by network pharmacology as a potential solution for complex disorders. These and other similar studies applying molecular topology suggest that some therapeutic categories may present a 'topological pattern' that goes beyond a specific mechanism of action.
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Affiliation(s)
- Carolina L Bellera
- a Medicinal Chemistry/Laboratory of Bioactive Research and Development, Department of Biological Sciences, Faculty of Exact Sciences , University of La Plata (UNLP) , La Plata , Buenos Aires , Argentina
| | - Mauricio E Di Ianni
- a Medicinal Chemistry/Laboratory of Bioactive Research and Development, Department of Biological Sciences, Faculty of Exact Sciences , University of La Plata (UNLP) , La Plata , Buenos Aires , Argentina
| | - Alan Talevi
- a Medicinal Chemistry/Laboratory of Bioactive Research and Development, Department of Biological Sciences, Faculty of Exact Sciences , University of La Plata (UNLP) , La Plata , Buenos Aires , Argentina
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Sun B, Wang X, Cao R, Zhang Q, Liu Q, Xu M, Zhang M, Du X, Dong F, Yan X. NMR-based metabonomics study on the effect of Gancao in the attenuation of toxicity in rats induced by Fuzi. JOURNAL OF ETHNOPHARMACOLOGY 2016; 193:617-626. [PMID: 27746335 DOI: 10.1016/j.jep.2016.10.042] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 10/12/2016] [Accepted: 10/12/2016] [Indexed: 05/19/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Fuzi, the processed lateral root of Aconitum carmichaelii Debeaux, is a traditional Chinese medicine used for its analgesic, antipyretic, anti-rheumatoid arthritis and anti-inflammation effects; however, it is also well known for its toxicity. Gancao, the root of Glycyrrhiza uralensis Fisch., is often used concurrently with Fuzi to alleviate its toxicity. However, the mechanism of detoxication is still not well clear. AIM OF THE STUDY In this study, the effect of Gancao on the metabolic changes induced by Fuzi was investigated by NMR-based metabonomic approaches. MATERIALS AND METHODS Fifty male Wistar rats were randomly divided into five groups (group A: control, group B: Fuzi decoction alone, group C: Gancao decoction alone, group D: Fuzi decoction and Gancao decoction simultaneously, group E: Fuzi decoction 5h after Gancao decoction) and urine samples were collected for NMR-based metabolic profiling analysis. Statistical analyses such as unsupervised PCA, t-test, hierarchical cluster, and pathway analysis were used to detect the effects of Gancao on the metabolic changes induced by Fuzi. RESULTS The behavioral and biochemical characteristics showed that Fuzi exhibited toxic effects on treated rats (group B) and statistical analyses showed that their metabolic profiles were in contrast to those in groups A and C. However, when Fuzi was administered with Gancao, the metabolic profiles became similar to controls, whereby Gancao reduced the levels of trimethylamine N-oxide, betaine, dimethylglycine, valine, acetoacetate, citrate, fumarate, 2-ketoglutarate and hippurate, and regulated the concentrations of taurine and 3-hydroxybutyrate, resulting in a decrease in toxicity. Furthermore, important pathways that are known to be involved in the effect of Gancao on Fuzi, including phenylalanine, tyrosine and tryptophan biosynthesis, the synthesis and degradation of ketone bodies, and the TCA cycle, were altered in co-treated rats. CONCLUSIONS Gancao treatment mitigated the metabolic changes altered by Fuzi administration in rats, demonstrating that dosing with Gancao could reduce the toxicity of Fuzi at the metabolic level. Fuzi and Gancao administered simultaneously resulted in improved toxicity reduction than when Gancao was administrated 5h prior to Fuzi. In summary, co-administration of Gancao with Fuzi reduces toxicity at the metabolic level.
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Affiliation(s)
- Bo Sun
- National Center of Biomedical Analysis, Beijing 100850, PR China.
| | - Xubin Wang
- National Center of Biomedical Analysis, Beijing 100850, PR China.
| | - Ruili Cao
- National Center of Biomedical Analysis, Beijing 100850, PR China.
| | - Qi Zhang
- National Center of Biomedical Analysis, Beijing 100850, PR China.
| | - Qiao Liu
- National Center of Biomedical Analysis, Beijing 100850, PR China; Chenzhou First People's Hospital, Chenzhou 423000, PR China.
| | - Meifeng Xu
- National Center of Biomedical Analysis, Beijing 100850, PR China.
| | - Ming Zhang
- National Center of Biomedical Analysis, Beijing 100850, PR China; School of Pharmacy, Shengyang Pharmaceutical University, Shenyang 110016, PR China.
| | - Xiangbo Du
- National Center of Biomedical Analysis, Beijing 100850, PR China.
| | - Fangting Dong
- National Center of Biomedical Analysis, Beijing 100850, PR China.
| | - Xianzhong Yan
- National Center of Biomedical Analysis, Beijing 100850, PR China.
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Talevi A. Computational approaches for innovative antiepileptic drug discovery. Expert Opin Drug Discov 2016; 11:1001-16. [DOI: 10.1080/17460441.2016.1216965] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Use, history, and liquid chromatography/mass spectrometry chemical analysis of Aconitum. J Food Drug Anal 2015; 24:29-45. [PMID: 28911407 PMCID: PMC9345420 DOI: 10.1016/j.jfda.2015.09.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 04/23/2015] [Accepted: 09/23/2015] [Indexed: 12/11/2022] Open
Abstract
Aconitum and its products have been used in Asia for centuries to treat various ailments, including arthritis, gout, cancer, and inflammation. In general, their preparations and dispensing have been restricted to qualified folk medicine healers due to their low safety index and reported toxicity. In the past few decades, official guidelines have been introduced in Asian pharmacopeias to control Aconitum herbal products. However, these guidelines were based on primitive analytical techniques for the determination of the whole Aconitum alkaloids and were unable to distinguish between toxic and nontoxic components. Recent advances in analytical techniques, especially high performance liquid chromatography (HPLC) and electrophoresis coupled with highly sensitive detectors, allowed rapid and accurate determination of Aconitum secondary metabolites. Reports focusing on liquid chromatography/mass spectrometry analysis of Aconitum and its herbal products are discussed in the current review. This review can be used by the health liquid chromatography/mass spectrometry regulatory authorities for updating pharmacopeial guidelines of Aconitum and its herbal products.
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Serum Pharmacochemistry Analysis Using UPLC-Q-TOF/MS after Oral Administration to Rats of Shenfu Decoction. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:973930. [PMID: 26273317 PMCID: PMC4530229 DOI: 10.1155/2015/973930] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 05/27/2015] [Accepted: 05/28/2015] [Indexed: 11/21/2022]
Abstract
The purpose of this study was to study the serum pharmacochemistry of SFD as well as the material basis through analyzing the constituents absorbed in blood. The SFD was orally administrated to Wistar rats at 20 g·kg−1, and Ultra Performance Liquid Chromatography (UPLC) fingerprints of SFD were created. Serum samples were collected for analysis, and further data processing used MarkerLynx XS software. 19 ginsenosides and 16 alkaloids were detected in SFD. The absorption of alkaloids (mainly monoester diterpenoid alkaloids) increased when Aconitum carmichaeli Debx. was combined with Panax ginseng, while the ginsenosides remained stable. Diester diterpenoid alkaloids were not present in the serum samples. A suitable serum pharmacochemistry method was successfully established to study pharmacological effects and potential improvements in formulation. This may also be useful for toxicity reduction. We suspect that the increased absorption of the monoester diterpenoid alkaloids from the mixture of Panax and Radix, compared to the Panax only extract, may be the reason for the combination of the two herbs in popular medicine formulas in China.
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Nyirimigabo E, Xu Y, Li Y, Wang Y, Agyemang K, Zhang Y. A review on phytochemistry, pharmacology and toxicology studies of Aconitum. J Pharm Pharmacol 2014; 67:1-19. [DOI: 10.1111/jphp.12310] [Citation(s) in RCA: 131] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 07/18/2014] [Indexed: 12/22/2022]
Abstract
Abstract
Objectives
A number of species belonging to herbal genus Aconitum are well-known and popular for their medicinal benefits in Indian, Vietnamese, Korean, Japanese, Tibetan and Chinese systems of medicine. It is a valuable drug as well as an unpredictable toxic material. It is therefore imperative to understand and control the toxic potential of herbs from this genus. In this review, the ethnomedicinal, phytochemistry, pharmacology, structure activity relationship and toxicology studies of Aconitum were presented to add to knowledge for their safe application.
Key findings
A total of about 76 of all aconite species growing in China and surrounding far-east and Asian countries are used for various medical purposes. The main ingredients of aconite species are alkaloids, flavonoids, free fatty acids and polysaccharides. The tuberous roots of genus Aconitum are commonly applied for various diseases such as rheumatic fever, painful joints and some endocrinal disorders. It stimulates the tip of sensory nerve fibres. These tubers of Aconitum are used in the herbal medicines only after processing. There remain high toxicological risks of the improper medicinal applications of Aconitum. The cardio and neurotoxicities of this herb are potentially lethal. Many analytical methods have been reported for quantitatively and qualitatively characterization of Aconitum.
Summary
Aconitum is a plant of great importance both in traditional medicine in general and in TCM in particular. Much attention should be put on Aconitum because of its narrow therapeutic range. However, Aconitum's toxicity can be reduced using different techniques and then benefit from its pharmacological activities. New methods, approaches and techniques should be developed for chemical and toxicological analysis to improve its quality and safety.
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Affiliation(s)
- Eric Nyirimigabo
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- Rwanda Standards Board, Kigali, Republic of Rwanda
| | - Yanyan Xu
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yubo Li
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yuming Wang
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Kojo Agyemang
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- Noguchi Memorial Institute for Medical Research, Accra, Ghana
| | - Yanjun Zhang
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
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Sun B, Zhang M, Zhang Q, Ma K, Li H, Li F, Dong F, Yan X. Metabonomics study of the effects of pretreatment with glycyrrhetinic acid on mesaconitine-induced toxicity in rats. JOURNAL OF ETHNOPHARMACOLOGY 2014; 154:839-46. [PMID: 24846827 DOI: 10.1016/j.jep.2014.05.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 03/19/2014] [Accepted: 05/11/2014] [Indexed: 05/15/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Aconitum carmichaelii Debx. (Fuzi), a commonly use traditional Chinese medicine (TCM), has often been used in combination with Rhizoma Glycyrrhizae (Gancao) to reduce its toxicity due to diester diterpenoid alkaloids aconitine, mesaconitine, and hypaconitine. However, the mechanism of detoxication is still unclear. Glycyrrhetinic acid (GA) is the metabolite of glycyrrhizinic acid (GL), the major component of Gancao. In present study, the effect of GA on the changes of metabolic profiles induced by mesaconitine was investigated using NMR-based metabolomic approaches. MATERIALS AND METHODS Fifteen male Wistar rats were divided into a control group, a group administered mesaconitine alone, and a group administered mesaconitine with one pretreatment with GA. Their urine samples were used for NMR spectroscopic metabolic profiling. Statistical analyses such as orthogonal projections to latent structures-discriminant analysis (OPLS-DA), t-test, hierarchical cluster, and pathway analysis were used to detect the effects of pretreatment with GA on mesaconitine-induced toxicity. RESULTS The OPLS-DA score plots showed the metabolic profiles of GA-pretreated rats apparently approach to those of normal rats compared to mesaconitine-induced rats. From the t-test and boxplot results, the concentrations of leucine/isoleucine, lactate, acetate, succinate, trimethylamine (TMA), dimethylglycine (DMG), 2-oxo-glutarate, creatinine/creatine, glycine, hippurate, tyrosine and benzoate were significantly changed in metabolic profiles of mesaconitine-induced rats. The disturbed metabolic pathways include amino acid biosynthesis and metabolism. CONCLUSIONS GA-pretreatment can mitigate the metabolic changes caused by mesaconitine-treatment on rats, indicating that prophylaxis with GA could reduce the toxicity of mesaconitine at the metabolic level.
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Affiliation(s)
- Bo Sun
- National Center of Biomedical Analysis, 27 Taiping Road, Beijing 100850, PR China
| | - Ming Zhang
- National Center of Biomedical Analysis, 27 Taiping Road, Beijing 100850, PR China; Department of Analytical Chemistry, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Qi Zhang
- National Center of Biomedical Analysis, 27 Taiping Road, Beijing 100850, PR China
| | - Kunpeng Ma
- National Center of Biomedical Analysis, 27 Taiping Road, Beijing 100850, PR China
| | - Haijing Li
- National Center of Biomedical Analysis, 27 Taiping Road, Beijing 100850, PR China
| | - Famei Li
- Department of Analytical Chemistry, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Fangting Dong
- National Center of Biomedical Analysis, 27 Taiping Road, Beijing 100850, PR China
| | - Xianzhong Yan
- National Center of Biomedical Analysis, 27 Taiping Road, Beijing 100850, PR China.
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Tong P, Wu C, Wang X, Hu H, Jin H, Li C, Zhu Y, Shan L, Xiao L. Development and assessment of a complete-detoxication strategy for Fuzi (lateral root of Aconitum carmichaeli) and its application in rheumatoid arthritis therapy. JOURNAL OF ETHNOPHARMACOLOGY 2013; 146:562-571. [PMID: 23376046 DOI: 10.1016/j.jep.2013.01.025] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2012] [Revised: 12/03/2012] [Accepted: 01/21/2013] [Indexed: 06/01/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Fuzi (lateral root of Aconitum carmichaeli) is a popular traditional Chinese medicine well known for its both therapeutic and high-toxic activities. Its toxic alkaloid ingredients, mainly aconitine, mesaconitine, and hypaconitine, are responsible for the high toxicity. However, to date, no detoxication strategy is available to completely eliminate Fuzi's toxicity, and, whether Fuzi's efficacy could be kept after detoxication, remain unknown and debatable. MATERIALS AND METHODS The purpose of this study was to establish and validate a complete-detoxication strategy for Fuzi via acute toxicity test, to clarify the detoxication mechanism by HPLC and titrimetric analyses, and to evaluate the therapeutic effect of detoxicated Fuzi on adjuvant arthritis (AA). Three processed Fuzi (Bai-fu-pian) with 30-min, 60-min, and 120-min decoctions, respectively, named dBfp-30, dBfp-60, and dBfp-120, were prepared for this study. For the acute toxicity test, their oral doses to male and female Kunming mice were up to 70-190g/kg body weight, and their toxicological profiles were evaluated by median lethal dose (LD50), maximal tolerance dose (MTD), minimal lethal dose (MLD), no-observed-adverse-effect-level (NOAEL), and time-concentration-mortality (TCM) modeling methods using a 14-day schedule with up to five doses. The HPLC analysis was performed to determine the detoxication-induced changes in composition and amount of aconitine, mesaconitine and hypaconitine in Fuzi, whilst the titrimetric method was adopted to estimate the amount changes of Fuzi's total alkaloids. AA model was established by incomplete Freund's adjuvant injection in Wistar rats, and the animal's physiological (body weight, food intake, etc.), clinical (hind paw volume), and immunological (IL-1 and TNF-α) parameters were assessed as markers of inflammation and arthritis. RESULTS With increasing decoction time, the acute toxicity of detoxicated Fuzi became decreased in the following order: dBfp-30 (LD50 of 145.1g/kg; MTD of 70g/kg; MLD of 100g/kg; NOAEL of 70g/kg) >dBfp-60 (too large LD50; MTD of 160g/kg; MLD of 190g/kg; NOAEL of 100g/kg) >dBfp-120 (no LD50; unlimited MTD; unlimited MLD; NOAEL of 130g/kg). dBfp-30 and dBfp-60 displayed the toxicity at a dose-dependent manner with maximum mortalities reaching 100% and 50% respectively, whereas no mortality or signs of intoxication was induced by dBfp-120. The chemical analyses revealed a dramatic reduction of the toxic alkaloids as well as total alkaloids in Fuzi after the detoxication, from which no level of aconitine and only minimum residual of mesaconitine (0.56±0.02μg/g) and hypaconitine (8.73±0.13μg/g) were detected in dBfp-120. However, no significant difference of total alkaloid amount was found among dBfp-30, dBfp-60, and dBfp-120 (P>0.05), suggesting an equivalent conversion from toxic alkaloids to its non-toxic derivants in dBfp-120. Further, also no significant differences were seen among dBfp-30, dBfp-60, and dBfp-120 for the therapeutic effects on physiological, clinical, and immunological parameters in AA rat, indicating that dBfp-120 is of non-toxicity and efficacy. CONCLUSIONS A complete-detoxication strategy has been developed successfully for ensuring the safe and effective use of Fuzi. The detoxication mechanism associated with elimination of toxic alkaloids has kept Fuzi's efficacy, indicating a non-interdependent relationship between its efficacy and toxicity. This is the first report on such an optimal detoxication strategy and on the application of detoxicated Fuzi in AA. It may provide in depth understanding to the toxicological and pharmacological profiles of Fuzi and further benefit the herbal drug development with safety and efficacy for disease especially RA therapy.
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Affiliation(s)
- Peijian Tong
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Traditional Chinese Medicine), Hangzhou 310006, China
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Tong F, Coats JR. Quantitative structure-activity relationships of monoterpenoid binding activities to the housefly GABA receptor. PEST MANAGEMENT SCIENCE 2012; 68:1122-1129. [PMID: 22461383 DOI: 10.1002/ps.3280] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 01/01/2012] [Accepted: 01/25/2012] [Indexed: 05/31/2023]
Abstract
BACKGROUND Monoterpenoids are a large group of plant secondary metabolites. Many of these naturally occurring compounds have shown good insecticidal potency on pest insects. Previous studies in this laboratory have indicated that some monoterpenoids have positive modulatory effects on insect GABA receptors. In this study, the key properties of monoterpenoids involved in monoterpenoid binding activity at the housefly GABA receptor were determined by developing quantitative structure-activity relationship (QSAR) models, and the relationship between the toxicities of these monoterpenoids and their GABA receptor binding activities was evaluated. RESULTS Two QSAR models were determined for nine monoterpenoids showing significant effects on [³H]-TBOB binding and for nine p-menthane analogs with at least one oxygen atom attached to the ring. The Mulliken charges on certain carbon atoms, the log P value and the total energy showed significant relationships with binding activities to the housefly GABA receptor in these two QSAR models. CONCLUSIONS From the QSAR models, some chemical and structural parameters, including the electronic properties, hydrophobicity and stability of monoterpenoid molecules, were suggested to be strongly involved in binding activities to the housefly GABA receptor. These findings will help to understand the mode of action of these natural insecticides, and provide guidance to predict more monoterpenoid insecticides.
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Affiliation(s)
- Fan Tong
- Pesticide Toxicology Laboratory, Department of Entomology, Iowa State University, Ames, IA, USA
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Zhao J, Zhang J, Xu B, Wang Z, Cheng J, Zhu G. Design, synthesis, and analysis of the quantitative structure-activity relationships of 4-phenyl-acyl-substituted 3-(2,5-dimethylphenyl)-4-hydroxy-1-azaspiro[4.5]dec-3-ene-2,8-dione derivatives. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:4779-87. [PMID: 22531003 DOI: 10.1021/jf3002069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
A series of 4-phenyl-acyl-substituted 3-(2,5-dimethylphenyl)-4-hydroxy-1-azaspiro[4.5]dec-3-ene-2,8-dione derivatives were designed and synthesized, and their structures were characterized using (1)H NMR (or (13)C NMR), mass spectrometry, and elemental analysis. The bioactivities of the new compounds were evaluated. These compounds exhibited good inhibition activities against bean aphids (Aphis fabae) and carmine spider mite (Tetranychus cinnabarinus), and 4-phenyl acyl esters showed stronger bioactivity than 4-arylesterases and alkyl esters. The results showed that compound 8-I-e, which contains a para-methoxy group on the phenyl acyl, and compound 8-I-m, which contains a para-trifluoromethyl group on the phenyl acyl, displayed potent insecticidal activity against A. fabae and T. cinnabarinus respectively. The insecticidal activity showed a clear structure-activity relationship, confirming the importance of the flexible bridge. The DFT/B3LYP/6-31(d) level method was used to calculate molecular geometries and electronic descriptors. These factors included total energy, charge distribution, and the linear orbital level of the title compounds. Quantitative structure-activity relationship studies were performed on these compounds using quantum-chemical and physicochemical parameters as independent variables and insecticidal activity as a dependent variable. Insecticidal activity was most closely correlated (r > 0.8) with quantum chemical and physicochemical parameters.
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Affiliation(s)
- Jinhao Zhao
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Pesticide and Environment Toxicology, Zhejiang University, Hangzhou 310029, China.
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Abstract
Terpenes and alkaloids are ever-growing classes of natural products that provide new molecular structures which inspire chemists and possess a broad range of biological activity. Terpenoid-alkaloids originate from the same prenyl units that construct terpene skeletons. However, during biosynthesis, a nitrogen atom (or atoms) is introduced in the form of β-aminoethanol, ethylamine, or methylamine. Nitrogen incorporation can occur either before, during, or after the cyclase phase. The outcome of this unique biosynthesis is the formation of natural products containing unprecedented structures. These complex structural motifs expose current limitations in organic chemistry, thus providing opportunities for invention. This review focuses on total syntheses of terpenoid-alkaloids and unique issues presented by this class of natural products. More specifically, it examines how these syntheses relate to the way terpenoid-alkaloids are made in Nature. Developments in chemistry that have facilitated these syntheses are emphasized, as well as chemical technology needed to conquer those that evade synthesis.
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Affiliation(s)
- Emily C. Cherney
- Department of Chemistry, The Scripps Research Institute 10550 N. Torrey Pines Rd, La Jolla, CA 92037 phone: (+1) 858-784-7370 fax: (+1) 858-784-7375
| | - Phil S. Baran
- Department of Chemistry, The Scripps Research Institute 10550 N. Torrey Pines Rd, La Jolla, CA 92037 phone: (+1) 858-784-7370 fax: (+1) 858-784-7375
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Song JZ, Han QB, Qiao CF, But PPH, Xu HX. Development and validation of a rapid capillary zone electrophoresis method for the determination of aconite alkaloids in aconite roots. PHYTOCHEMICAL ANALYSIS : PCA 2010; 21:137-143. [PMID: 19810124 DOI: 10.1002/pca.1168] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
INTRODUCTION Aconites, with aconite alkaloids as the major therapeutic and toxic components, are used for the treatment of analgesic, antirheumatic and neurological symptoms. Quantification of the aconite alkaloids is important for the quality control of aconite-containing drugs. OBJECTIVE To establish a validated capillary zone electrophoresis (CZE) method for the simultaneous determination of six major alkaloids, namely aconitine, mesaconitine, hypaconitine, benzoylaconine, benzoylmesaconine and benzoylhypaconine, in crude and processed aconite roots. METHODOLOGY The CZE method was optimised and validated using a stability-indicating method. The optimised running buffer was a mixture of 200 mm Tris, 150 mm perchloric acid and 40% 1,4-dioxane (pH 7.8) with the capillary thermostated at 25 degrees C. RESULTS Using the optimised method, six aconite alkaloids were well separated. The established method showed good precision, accuracy and recovery. Contents of these alkaloids in crude and processed aconites were determined and it was observed that the levels of individual alkaloids varied between samples. CONCLUSION The developed CZE method was reliable for the quality control of aconites contained in herbal medicines. The method could also be used as an approach for toxicological studies.
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Affiliation(s)
- Jing-Zheng Song
- Chinese Medicine Laboratory, Hong Kong Jockey Club Institute of Chinese Medicine, Rm 220, No. 2 Biotech. Ave, 12 Miles, Tai Po Road, Shatin, N.T., Hong Kong, China
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Abstract
The lasting attention that researchers have devoted to diterpenoid alkaloids is due to their various bioactivities and toxicities, structural complexity, and intriguing chemistry. From 1998 to the end of 2008, more than 300 new diterpenoid alkaloids were isolated from Nature. This review focuses on their structural relationships, and investigations into their chemical reactions, synthesis, and biological activities. A table that lists the names, plant sources, and structural types is given along with 363 references.
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Affiliation(s)
- Feng-Peng Wang
- Department of Chemistry of Medicinal Natural Products, West China College of Pharmacy, Sichuan University, Chengdu, 610041, P. R. China.
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Wang FP, Chen QH. The C19-Diterpenoid Alkaloids. THE ALKALOIDS: CHEMISTRY AND BIOLOGY 2010; 69:1-577, xi. [DOI: 10.1016/s1099-4831(10)69001-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Paluch G, Grodnitzky J, Bartholomay L, Coats J. Quantitative structure-activity relationship of botanical sesquiterpenes: spatial and contact repellency to the yellow fever mosquito, Aedes aegypti. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:7618-7625. [PMID: 19645502 DOI: 10.1021/jf900964e] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The plant terpenoids encompass a diversity of structures and have many functional roles in nature, including protection against pest arthropods. Previous studies in this laboratory have identified naturally occurring sesquiterpenes contained in essential oils from two plants, amyris (Amyris balsamifera) and Siam-wood (Fokienia hodginsii), that are significantly repellent to a spectrum of arthropod pests. In efforts to further examine the biological activity of this class of compounds 12 of these plant-derived sesquiterpenes have been isolated, purified, and assayed for spatial and contact repellency against the yellow fever mosquito, Aedes aegypti . These data were used to develop quantitative structure-activity relationships that identified key properties of the sesquiterpene molecule, including electronic and structural parameters that were used to predict optimal repellent activity. There were notable similarities in the models developed for spatial repellency over five time points and for contact repellency. Vapor pressure was an important component of all repellency models. Initial levels of spatial repellency were also related to polarizability of the molecule and lowest unoccupied molecular orbital (LUMO) energy, whereas the equation for late spatial repellency was dependent on other electronic features, including Mulliken population and electrotopological state descriptors. The model identified for contact repellency was the best fit and most significant model in this analysis and showed a relationship with vapor pressure, Mulliken population, and total energy.
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Affiliation(s)
- Gretchen Paluch
- 116 Insectary Building, Department of Entomology, Iowa State University, Ames, Iowa, 50011, USA
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Turabekova MA, Rasulev BF, Dzhakhangirov FN, Salikhov SI. Aconitum and Delphinium alkaloids "Drug-likeness" descriptors related to toxic mode of action. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2008; 25:310-320. [PMID: 21783868 DOI: 10.1016/j.etap.2007.10.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2007] [Revised: 10/23/2007] [Accepted: 10/23/2007] [Indexed: 05/31/2023]
Abstract
Large series of Aconitum and Delphinium alkaloids have been investigated by means of QSAR analysis. Descriptors related to "drug-likeness" of molecules were selected to discriminate between "drugs" and "non-drugs" amongst diterpenoid alkaloids of interest. A usefulness of such approach has been assessed and it proved to give reliable results on whether a particular diterpenoid alkaloid is likely to be either poison or drug. A number of QSAR models with "drug-likeness" descriptors have also been obtained and discussed in terms of their relativity to the mode of toxic action exhibited by the alkaloids. The QSAR models were obtained with r value in the range 0.69-0.94. The q(2) (cross validation of r(2)) values also confirm the statistical significance of our models.
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Affiliation(s)
- Malakhat A Turabekova
- Chemistry Department, National University of Uzbekistan named after Mirzo Ulugbek, Vuzgorodok, Tashkent 700174, Uzbekistan; Institute of Chemistry of Plant Substances, Kh. Abdullaev Str. 77, Tashkent 700170, Uzbekistan
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Turabekova MA, Rasulev BF, Levkovich MG, Abdullaev ND, Leszczynski J. Aconitum and Delphinium sp. alkaloids as antagonist modulators of voltage-gated Na+ channels. AM1/DFT electronic structure investigations and QSAR studies. Comput Biol Chem 2008; 32:88-101. [PMID: 18201930 PMCID: PMC5001567 DOI: 10.1016/j.compbiolchem.2007.10.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2007] [Accepted: 10/18/2007] [Indexed: 11/22/2022]
Abstract
Early pharmacological studies of Aconitum and Delphinium sp. alkaloids suggested that these neurotoxins act at site 2 of voltage-gated Na(+) channel and allosterically modulate its function. Understanding structural requirements for these compounds to exhibit binding activity at voltage-gated Na(+) channel has been important in various fields. This paper reports quantum-chemical studies and quantitative structure-activity relationships (QSARs) based on a total of 65 natural alkaloids from two plant species, which includes both blockers and openers of sodium ion channel. A series of 18 antagonist alkaloids (9 blockers and 9 openers) have been studied using AM1 and DFT computational methods in order to reveal their structure-activity (structure-toxicity) relationship at electronic level. An examination of frontier orbitals obtained for ground and protonated forms of the compounds revealed that HOMOs and LUMOs were mainly represented by nitrogen atom and benzyl/benzoylester orbitals with -OH and -OCOCH(3) contributions. The results obtained from this research have confirmed the experimental findings suggesting that neurotoxins acting at type 2 receptor site of voltage-dependent sodium channel are activators and blockers with common structural features and differ only in efficacy. The energetic tendency of HOMO-LUMO energy gap can probably distinguish activators and blockers that have been observed. Genetic Algorithm with Multiple Linear Regression Analysis (GA-MLRA) technique was also applied for the generation of three-descriptor QSAR models for the set of 65 blockers. Additionally to the computational studies, the HOMO-LUMO gap descriptor in each obtained QSAR model has confirmed the crucial role of charge transfer in receptor-ligand interactions. A number of other descriptors such as logP, I(BEG), nNH2, nHDon, nCO have been selected as complementary ones to LUMO and their role in activity alteration has also been discussed.
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Affiliation(s)
- Malakhat A. Turabekova
- Chemistry Department, National University of Uzbekistan named after Mirzo Ulugbek, Vuzgorodok, Tashkent, 700174, Uzbekistan
- Institute of Chemistry of Plant Substances, Kh. Abdullaev Str., 77, Tashkent, 700170, Uzbekistan
| | - Bakhtiyor F. Rasulev
- Institute of Chemistry of Plant Substances, Kh. Abdullaev Str., 77, Tashkent, 700170, Uzbekistan
- Computational Center for Molecular Structure and Interactions, Jackson State University, 1325 J.R.Lynch Street, P.O.Box 17910, Jackson, Mississippi, 39217-0510 USA
| | - Mikhail G. Levkovich
- Institute of Chemistry of Plant Substances, Kh. Abdullaev Str., 77, Tashkent, 700170, Uzbekistan
| | - Nasrulla D. Abdullaev
- Institute of Chemistry of Plant Substances, Kh. Abdullaev Str., 77, Tashkent, 700170, Uzbekistan
| | - Jerzy Leszczynski
- Computational Center for Molecular Structure and Interactions, Jackson State University, 1325 J.R.Lynch Street, P.O.Box 17910, Jackson, Mississippi, 39217-0510 USA
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Li L, Sun B, Zhang Q, Fang J, Ma K, Li Y, Chen H, Dong F, Gao Y, Li F, Yan X. Metabonomic study on the toxicity of Hei-Shun-Pian, the processed lateral root of Aconitum carmichaelii Debx. (Ranunculaceae). JOURNAL OF ETHNOPHARMACOLOGY 2008; 116:561-568. [PMID: 18308493 DOI: 10.1016/j.jep.2008.01.014] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2007] [Revised: 01/03/2008] [Accepted: 01/12/2008] [Indexed: 05/26/2023]
Abstract
The purpose of this paper was to study the effects of Hei-Shun-Pian, the processed lateral root of Aconitum carmichaelii Debx. (Ranunculaceae), on the metabolic profile of rats, to discuss the mechanism of toxicology and to find out the potential biomarkers of the toxic effects. Twenty male Wistar rats were divided into four groups (n=5) and each group were administered orally with the decoction of Hei-Shun-Pian (88.1g/kg per day, 35.6g/kg per day, 17.6g/kg per day) or equal volume of drinking water respectively for 14 days. Urine of every 24-h and the plasma of the last day were collected for NMR experiments, and then analyzed by multivariate analysis methods. Decreases in urinary excretion of taurine and trimethylamine-N-oxide (TMAO) and increases in urinary levels of citrate, 2-oxoglutarate (2-OG), succinate and hippurate were observed in the high and medium dosed groups at the early stage of the dosing period. Taurine level increased at the later stage of the dosing period to the normal value, and then even to a value higher than that of the control group at the end of the experiment. No metabolic differences were observed between low dosed and control groups until the later stage of the dosing period when a slight increase in urinary taurine level was observed, suggesting a cumulative effect. These results suggest the toxic effect of Hei-Shun-Pian on rat heart in a dose dependent manner.
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Affiliation(s)
- Ling Li
- National Center of Biomedical Analysis, Beijing 100850, People's Republic of China
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Siu FM, Che CM. Quantitative Structure−Activity (Affinity) Relationship (QSAR) Study on Protonation and Cationization of α-Amino Acids. J Phys Chem A 2006; 110:12348-54. [PMID: 17078635 DOI: 10.1021/jp064332n] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A quantitative structure-activity (affinity) relationship (QSAR) study is carried out to model the proton, sodium, copper, and silver cation affinities of alpha-amino acids (AA). Stepping multiple linear regression (MLR), partial least squares (PLS), and artificial neural network (ANN) approaches are applied to elucidate the multiple factors affecting these affinities. The MLR and PLS models reveal that the variation in proton affinity is attributed to the highest electrophilic superdelocalizability of nitrogen (major) and the number of rotatable bonds (minor) in AA. The noncovalent interactions, especially ion-dipole interactions, are responsible for the changes in Na+ affinity. The ionization potential, dipole moment of the side chain, and degree of linearity are the properties of AA that give the best correlation with the Cu+ and Ag+ affinities. The ANN models are developed to study the relationships (linear or nonlinear) between the molecular descriptors and binding affinities. The ANN models show higher predictive power. The QSAR models are used to study the binding forms of AA (neutral vs zwitterionic) upon protonation/cationization. To our knowledge, this is the first attempt to carry out a QSAR study on protonated/cationized AlphaAlpha to elucidate their binding properties. In virtue of the Na+ affinity ANN model, the Na+ affinities of dihydroxyphenylalanine (DOPA) were predicted. This work may pave the way for the success of applying similar approaches to peptides or proteins (with AA as the building blocks) in the future.
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Affiliation(s)
- Fung-Ming Siu
- Department of Chemistry, Open Laboratory of Chemical Biology of The Institute of Molecular Technology for Drug Discovery and Synthesis, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
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Turabekova MA, Rasulev BF. QSAR Analysis of the Structure—Toxicity Relationship of Aconitum and Delphinium Diterpene Alkaloids. Chem Nat Compd 2005. [DOI: 10.1007/s10600-005-0113-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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A QSAR toxicity study of a series of alkaloids with the lycoctonine skeleton. Molecules 2004; 9:1194-207. [PMID: 18007512 DOI: 10.3390/91201194] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2004] [Accepted: 08/10/2004] [Indexed: 11/17/2022] Open
Abstract
A QSAR toxicity analysis has been performed for a series of 19 alkaloids with the lycoctonine skeleton. GA-MLRA (Genetic Algorithm combined with Multiple Linear Regression Analysis) technique was applied for the generation of two types of QSARs: first, models containing exclusively 3D-descriptors and second, models consisting of physicochemical descriptors. As expected, 3D-descriptor QSARs have better statistical fits. Physicochemical-descriptor containing models, that are in a good agreement with the mode of toxic action exerted by the alkaloids studied, have also been identified and discussed. In particular, TPSA (Topological Polar Surface Area) and nC=O (number of -C(O)- fragments) parameters give the best statistically significant mono- and bidescriptor models (when combined with lipophilicity, MlogP) confirming the importance of H-bonding capability of the alkaloids for binding at the receptor site.
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Abstract
Biological activity of Aconitum alkaloids may be related to their toxicity rather than to a specific pharmacological action. A Quantitative structure-activity relationships (QSAR) analysis was performed on the following two groups of alkaloids: compounds with an aroyl/aroyloxy group at R(14) position (yunaconitine, bulleyaconitine, aconitine, beiwutine, nagarine, 3-acetyl aconitine, and penduline), and compounds with the aroyloxy group at R(4) position (N-deacetyllappaconitine, lappaconitine, ranaconitine, N-deacetylfinaconitine, N-deacetylranaconitine). The LD(50) (micromol/kg) of the 12 alkaloids were obtained from the literature. LD(50) was significantly lower in group 1 than in group 2. The steric and core-core repulsion energies were significantly higher in group 1. The total energy and heat of formation and electronic energies were significantly lower in group 1. The reactivity index of N, C1', C4' and C6' were similar between groups. The reactivity index of C2' was significantly higher and the reactivity index of C3' and C5' were significantly lower in group 1. Log P and pKa were similar between groups. Molecular weight was significantly higher in group 1. A significant linear relationship was observed between log LD(50) and either analgesic log ED(50) or local anesthetic log ED(50). The LD(50)/analgesic ED(50) obtained from average values was 5.9 for group 1 and 5.0 for group 2. However, the LD(50)/local anesthetic ED(50) was 40.4 and 318, respectively. The study supports that the analgesic effects of these alkaloids are secondary to their toxic effects whereas alkaloids from group 2 are susceptible to be further studied as local anesthetic agents.
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Bello-Ramírez AM, Nava-Ocampo AA. The local anesthetic activity of Aconitum alkaloids can be explained by their structural properties: a QSAR analysis. Fundam Clin Pharmacol 2004; 18:157-61. [PMID: 15066129 DOI: 10.1111/j.1472-8206.2004.00222.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Alkaloids isolated from Aconitum roots exhibit anesthetic effects at peripheral nerves. We performed the present quantitative structure-activity relationship (QSAR) analysis in order to understand the mechanism of action as local anesthetics of 11 Aconitum alkaloids. The alkaloids with the highest anesthetic activity had an aroyl/aroyloxy group at R14 position while the weaker anesthetic alkaloids had the aroyloxy group at R4. The stable compounds exhibited a higher local anesthetic activity than the unstable compounds. In relation to the reactivity indexes of atoms on the aromatic ring, C2' was more reactive while C3' and C5' were less reactive in the compounds with the highest anesthetic activity. Reactivity of N, C1', C4' and C6' was similar between the two groups of alkaloids. The pKa was approximately 7.3 in both groups. The local anesthetic ED50 of alkaloids was significantly inversely related to molecular weight, core-core repulsion energy, steric energy and RI-C2', and directly related to electronic energy, total energy, RI-C5' and to the heat of formation. In conclusion, we identified a set of structural parameters that are related to the local anesthetic activity of Aconitum alkaloids. Our findings are useful to understand the mechanism of action of these alkaloids and to provide a rational for chemical manipulation of the compounds in order to obtain potent derivates with minor toxicity.
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Affiliation(s)
- Angélica M Bello-Ramírez
- Molecular Design and Information Technology Center, Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada
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