Pub Date : 2022-12-08DOI: 10.2174/2210315513666221208154957
B. P. Kamdem, Eutrophe Le Doux Kamto, Désiré Soh, D. E. Pegnyemb, Stéphane Zingué, H. K. Paumo, L. Katata-Seru, Aboubakar Abou, Montsho Maiyane Rosinah, J. Mbah, F. Boyom
Native to the Southern Mediterranean region, Laurus nobilis L. (Family Lauraceae) is an evergreen shrub or tree found in warm climate regions with high rainfall. The leaves and essential oil of this plant have been widely used as condiments, spices, and flavoring agents in the culinary and food industries. The whole plant is also used for the traditional treatment of various diseases, including cough, asthma, hemorrhoids, rheumatic pain, diarrhea, intestinal, and cardiac diseases. Previous phytochemical investigation of this plant demonstrated the presence of a variety of secondary metabolites, especially terpenoids. The present study aims to critically analyze comprehensive literature on the pharmacological activity and mechanisms of action of terpenoids from Laurus nobilis L. The available information on the pharmacological activity of terpenoids from L. nobilis L. was obtained from textbooks, theses, as well as published articles through a variety of libraries and electronic databases. The present study demonstrated that L. nobilis is rich in terpenoids, with more than 200 entities identified in reported studies. Terpenoids from L. nobilis have shown a wide range of pharmacological activities, including anti-inflammatory, antidiabetic, antifungal, antibacterial, immunomodulatory, anticonvulsant, antioxidant and cytotoxic activities. The mechanisms of action of most of these terpenoids included the imbalance of the ionic permeability of the cell membrane (anti-inflammatory and antimicrobial activities), modulation of the effects of gamma-aminobutyric acid (GABA)nergic neurotransmission (anticonvulsant activity), and the inhibition of inflammatory responses, prevention of metastasis, and induction of apoptosis (cytotoxic effect), among others. Referring to in vitro studies, terpenoids of L. nobilis L. have shown a variety of biological activities. However, more cytotoxic and in vivo studies and detailed mechanisms of action of the bioactive terpenoids are recommended.
Laurus nobilis L.(樟科)原产于地中海南部地区,是一种常绿灌木或树木,分布在气候温暖、降雨量大的地区。这种植物的叶子和精油在烹饪和食品工业中被广泛用作调味品、香料和调味剂。整株植物还用于各种疾病的传统治疗,包括咳嗽、哮喘、痔疮、风湿性疼痛、腹泻、肠道和心脏病。先前对该植物的植物化学研究表明,该植物存在多种次生代谢产物,尤其是萜类化合物。本研究旨在批判性地分析关于月桂萜类化合物药理活性和作用机制的综合文献。有关月桂萜类物质药理活性的现有信息来自教科书、论文以及通过各种图书馆和电子数据库发表的文章。本研究表明,锦葵富含萜类化合物,在已报道的研究中鉴定了200多个实体。诺比尔乳杆菌的萜类化合物具有广泛的药理活性,包括抗炎、抗糖尿病、抗真菌、抗菌、免疫调节、抗惊厥、抗氧化和细胞毒性活性。这些萜类化合物的作用机制包括细胞膜离子渗透性的失衡(抗炎和抗菌活性)、调节γ-氨基丁酸(GABA)能神经传递的作用(抗惊厥活性)以及抑制炎症反应、预防转移、,以及诱导细胞凋亡(细胞毒性作用)等。根据体外研究,锦葵的萜类化合物显示出多种生物活性。然而,建议对生物活性萜类化合物进行更多的细胞毒性和体内研究以及详细的作用机制。
{"title":"Pharmacological activity and mechanisms of action of terpenoids from Laurus nobilis L","authors":"B. P. Kamdem, Eutrophe Le Doux Kamto, Désiré Soh, D. E. Pegnyemb, Stéphane Zingué, H. K. Paumo, L. Katata-Seru, Aboubakar Abou, Montsho Maiyane Rosinah, J. Mbah, F. Boyom","doi":"10.2174/2210315513666221208154957","DOIUrl":"https://doi.org/10.2174/2210315513666221208154957","url":null,"abstract":"\u0000\u0000Native to the Southern Mediterranean region, Laurus nobilis L. (Family Lauraceae) is an evergreen shrub or tree found in warm climate regions with high rainfall. The leaves and essential oil of this plant have been widely used as condiments, spices, and flavoring agents in the culinary and food industries. The whole plant is also used for the traditional treatment of various diseases, including cough, asthma, hemorrhoids, rheumatic pain, diarrhea, intestinal, and cardiac diseases. Previous phytochemical investigation of this plant demonstrated the presence of a variety of secondary metabolites, especially terpenoids.\u0000\u0000\u0000\u0000The present study aims to critically analyze comprehensive literature on the pharmacological activity and mechanisms of action of terpenoids from Laurus nobilis L.\u0000\u0000\u0000\u0000The available information on the pharmacological activity of terpenoids from L. nobilis L. was obtained from textbooks, theses, as well as published articles through a variety of libraries and electronic databases.\u0000\u0000\u0000\u0000The present study demonstrated that L. nobilis is rich in terpenoids, with more than 200 entities identified in reported studies. Terpenoids from L. nobilis have shown a wide range of pharmacological activities, including anti-inflammatory, antidiabetic, antifungal, antibacterial, immunomodulatory, anticonvulsant, antioxidant and cytotoxic activities. The mechanisms of action of most of these terpenoids included the imbalance of the ionic permeability of the cell membrane (anti-inflammatory and antimicrobial activities), modulation of the effects of gamma-aminobutyric acid (GABA)nergic neurotransmission (anticonvulsant activity), and the inhibition of inflammatory responses, prevention of metastasis, and induction of apoptosis (cytotoxic effect), among others.\u0000\u0000\u0000\u0000Referring to in vitro studies, terpenoids of L. nobilis L. have shown a variety of biological activities. However, more cytotoxic and in vivo studies and detailed mechanisms of action of the bioactive terpenoids are recommended.\u0000","PeriodicalId":56153,"journal":{"name":"Natural Products Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44453924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-25DOI: 10.2174/2210315513666221125142944
Huseyin Aksit, Erdem Ozan, R. Erenler
Natural products have been used commonly in the pharmaceutical industry as well as traditional medicine due to their bioactive contents. The objective of this study is to isolate the polymethoxy flavones (PMFs) and evaluate the antiproliferative activity. The PMFs were extracted from Mentha dumetorum with boiling hot water and then partitioned with hexane and the extract was subjected to chromatographic techniques such as Sephadex LH-20, silica gel, and preparative TLC, and HPLC to isolate the compounds. The structures of isolated compounds were elucidated by spectroscopic techniques such as 1H-NMR, 13C-NMR, LC-TOF-MS, and UV-Vis. The anti-cancer effects of isolated compounds were evaluated using a real-time cell analyzer–single plate (RTCA-SP) instrument against HeLa and HT29 cell lines. The isolated PMFs were identified as xanthomicrol (1), 5-hydroxy-6,7,8,4'-tetrametoxy flavanone (2), 5-desmetil sinensetin (3), 5-demetil nobiletin (4), gardenin B (5), 5-hydroxy-6,7,8,3',4'-penta methoxy flavanone (6) and 5-hydroxy-6,7,4'-trimethoxy flavone (7). Compounds 2 and 5 were found to be the most active against both cell lines. The isolated compounds as well as the plant extract of Mentha dumetorum could be promising agents for the drug development process, especially drugs for cancer treatment. Moreover, isolation methods were developed for the corresponding compounds.
{"title":"Isolation, characterization, and antiproliferative activity of polymethoxy flavones from Mentha dumetorum","authors":"Huseyin Aksit, Erdem Ozan, R. Erenler","doi":"10.2174/2210315513666221125142944","DOIUrl":"https://doi.org/10.2174/2210315513666221125142944","url":null,"abstract":"\u0000\u0000Natural products have been used commonly in the pharmaceutical industry as well as traditional medicine due to their bioactive contents.\u0000\u0000\u0000\u0000The objective of this study is to isolate the polymethoxy flavones (PMFs) and evaluate the antiproliferative activity.\u0000\u0000\u0000\u0000The PMFs were extracted from Mentha dumetorum with boiling hot water and then partitioned with hexane and the extract was subjected to chromatographic techniques such as Sephadex LH-20, silica gel, and preparative TLC, and HPLC to isolate the compounds. The structures of isolated compounds were elucidated by spectroscopic techniques such as 1H-NMR, 13C-NMR, LC-TOF-MS, and UV-Vis. The anti-cancer effects of isolated compounds were evaluated using a real-time cell analyzer–single plate (RTCA-SP) instrument against HeLa and HT29 cell lines.\u0000\u0000\u0000\u0000The isolated PMFs were identified as xanthomicrol (1), 5-hydroxy-6,7,8,4'-tetrametoxy flavanone (2), 5-desmetil sinensetin (3), 5-demetil nobiletin (4), gardenin B (5), 5-hydroxy-6,7,8,3',4'-penta methoxy flavanone (6) and 5-hydroxy-6,7,4'-trimethoxy flavone (7). Compounds 2 and 5 were found to be the most active against both cell lines.\u0000\u0000\u0000\u0000The isolated compounds as well as the plant extract of Mentha dumetorum could be promising agents for the drug development process, especially drugs for cancer treatment. Moreover, isolation methods were developed for the corresponding compounds.\u0000","PeriodicalId":56153,"journal":{"name":"Natural Products Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47107438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-14DOI: 10.2174/2210315513666221114112253
S. Abu Bakar, K. Chin, N. Zainal, S. Sam
Zika virus (ZIKV) infection is a public health concern and currently there is no specific therapeutic or approved vaccine. Resveratrol (RESV), a natural antiviral compound, has been shown to possess antiviral properties against ZIKV and other viral infections, but the mechanisms of action against ZIKV remain unknown. This study aimed to investigate the role of the high mobility group box 1 protein (HMGB1) in the underlying anti-ZIKV mechanisms of RESV. HMGB1 protein expression and ZIKV replication in both the RESV-treated wild-type (WT) and HMGB1-knockdown (shHMGB1) Huh7 cells were analyzed using ELISA, immunofluorescence assay, immunoblot assay, focus-forming assay and qRT-PCR. HMGB1’s role was explored by evaluating the changes in the type-1 interferon (IFN) response genes using the qRT-PCR and immunoblot assays. The treatment of the ZIKV-infected WT Huh7 cells with RESV significantly reduced ZIKV titers by >90% (P < 0.001) at 48 and 72 hr pi in a dose-dependent manner and inhibited ZIKV-induced HMGB1 translocation (P < 0.001), resulting in nuclear HMGB1 accumulation. Compared to the WT Huh7 cells and shHMGB1 Huh7 cells without RESV treatment showed a significant increase in the infectious virus titers and RNA with a maximum rise of 74% (P < 0.001) and 65% (P < 0.01), respectively. RESV treatment of the ZIKV-infected WT Huh7 cells significantly increased the MxA (one of the classical interferon-stimulated genes, ISGs) and IFN-β levels (p < 0.05). The treatment of the infected shHMGB1 Huh7 cells with RESV showed a less effective antiviral response (P > 0.05) and did not cause changes in the expressions of MxA and IFN-β. RESV possesses therapeutic activity against ZIKV infection and the mechanism of action is mainly attributed to HMGB1 nuclear retention, which could upregulate the type-1 IFN and ISGs. -
{"title":"Resveratrol treatment-induced nuclear HMGB1 retention is critical for inducing host interferon responses against Zika virus","authors":"S. Abu Bakar, K. Chin, N. Zainal, S. Sam","doi":"10.2174/2210315513666221114112253","DOIUrl":"https://doi.org/10.2174/2210315513666221114112253","url":null,"abstract":"\u0000\u0000Zika virus (ZIKV) infection is a public health concern and currently there is no specific therapeutic or approved vaccine. Resveratrol (RESV), a natural antiviral compound, has been shown to possess antiviral properties against ZIKV and other viral infections, but the mechanisms of action against ZIKV remain unknown.\u0000\u0000\u0000\u0000This study aimed to investigate the role of the high mobility group box 1 protein (HMGB1) in the underlying anti-ZIKV mechanisms of RESV.\u0000\u0000\u0000\u0000HMGB1 protein expression and ZIKV replication in both the RESV-treated wild-type (WT) and HMGB1-knockdown (shHMGB1) Huh7 cells were analyzed using ELISA, immunofluorescence assay, immunoblot assay, focus-forming assay and qRT-PCR. HMGB1’s role was explored by evaluating the changes in the type-1 interferon (IFN) response genes using the qRT-PCR and immunoblot assays.\u0000\u0000\u0000\u0000The treatment of the ZIKV-infected WT Huh7 cells with RESV significantly reduced ZIKV titers by >90% (P < 0.001) at 48 and 72 hr pi in a dose-dependent manner and inhibited ZIKV-induced HMGB1 translocation (P < 0.001), resulting in nuclear HMGB1 accumulation. Compared to the WT Huh7 cells and shHMGB1 Huh7 cells without RESV treatment showed a significant increase in the infectious virus titers and RNA with a maximum rise of 74% (P < 0.001) and 65% (P < 0.01), respectively. RESV treatment of the ZIKV-infected WT Huh7 cells significantly increased the MxA (one of the classical interferon-stimulated genes, ISGs) and IFN-β levels (p < 0.05). The treatment of the infected shHMGB1 Huh7 cells with RESV showed a less effective antiviral response (P > 0.05) and did not cause changes in the expressions of MxA and IFN-β.\u0000\u0000\u0000\u0000RESV possesses therapeutic activity against ZIKV infection and the mechanism of action is mainly attributed to HMGB1 nuclear retention, which could upregulate the type-1 IFN and ISGs.\u0000\u0000\u0000\u0000-\u0000","PeriodicalId":56153,"journal":{"name":"Natural Products Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45213581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-04DOI: 10.2174/2210315513666221104154116
Han-Seung Shin, Yong-Yeon Kim
Sandwich enzyme-linked immunosorbent assay (ELISA) to quantify monoclonal antibody (B[a]P-13) Only a few studies have focused on the analysis using specific antibodies in the sandwich ELISA method to each B[a]P in herbal medicine products. In contrast to the sandwich ELISA method, many competitive ELISA methods using specific antibodies such as benzo[a]pyrene monoclonal antibody (B[a]P-13) and a goat anti-mouse IgG (H+L) cross-adsorbed secondary antibody, horseradish peroxidase (HRP) were developed. The objective of this study was to develop and validate the method for the response of the benzo[a]pyrene monoclonal antibody (B[a]P-13) and goat anti-mouse IgG (H+L) cross-adsorbed secondary antibody (HRP) to prepare the immunogen and its application to detect the benzo[a]pyrene in various herbal medicine products. This research method includes preparation of B[a]P-protein conjugates, sampling and extraction procedure for herbal medicines, sandwich ELISA procedure, evaluation of cross-reactivity for determination, matrix effect of the organic solvents, correlation of benzo[a]pyrene detection ELISA compared to HPLC-FLD in herbal medicine products. The sandwich ELISA method for B[a]P was validated in linearity (R2 > 0.99), the limit of detection (LOD) (0.080.19 μg/kg) and limit of quantification (LOQ) (0.240.57 μg/kg), accuracy (95.58117.06 %), and precision (3.8010.26 %). The cross-reactivity (CR) was found for B[a]P (100%), CHR (39%), B[b]F (27%), and B[a]A (41%). As a solvent, acetonitrile (MeCN) was used to express the normalized sandwich ELISA calibration curves with benzo[a]pyrene monoclonal antibody (B[a]P-13). The antigen-antibody binding in sandwich ELISA was decreased about 10 times with increasing the salt content (0.0060.18 mol/L phosphate to 20400 mmol/L). The pH range from 6 to 9 was not considered to affect the performance of the sandwich ELISA. Correlation of B[a]P detection in herbal medicines with ELISA compared to HPLC-FLD expressed good correlation (R2 = 0.991) and the slope of the graph for the ELISA (B[a]P-equivalents μg/kg) value divided by the HPLC-FLD (B[a]P μg/kg) value was 0.7292. Therefore, sandwich ELISA method using benzo[a]pyrene monoclonal antibody (B[a]P-13) could be an alternative screening method for detection of B[a]P in herbal medicine products.
{"title":"Sandwich enzyme-linked immunosorbent assay (ELISA) to quantify monoclonal antibody (B[a]P-13) for herbal medicine products","authors":"Han-Seung Shin, Yong-Yeon Kim","doi":"10.2174/2210315513666221104154116","DOIUrl":"https://doi.org/10.2174/2210315513666221104154116","url":null,"abstract":"\u0000\u0000Sandwich enzyme-linked immunosorbent assay (ELISA) to quantify monoclonal antibody (B[a]P-13)\u0000\u0000\u0000\u0000Only a few studies have focused on the analysis using specific antibodies in the sandwich ELISA method to each B[a]P in herbal medicine products. In contrast to the sandwich ELISA method, many competitive ELISA methods using specific antibodies such as benzo[a]pyrene monoclonal antibody (B[a]P-13) and a goat anti-mouse IgG (H+L) cross-adsorbed secondary antibody, horseradish peroxidase (HRP) were developed.\u0000\u0000\u0000\u0000The objective of this study was to develop and validate the method for the response of the benzo[a]pyrene monoclonal antibody (B[a]P-13) and goat anti-mouse IgG (H+L) cross-adsorbed secondary antibody (HRP) to prepare the immunogen and its application to detect the benzo[a]pyrene in various herbal medicine products.\u0000\u0000\u0000\u0000This research method includes preparation of B[a]P-protein conjugates, sampling and extraction procedure for herbal medicines, sandwich ELISA procedure, evaluation of cross-reactivity for determination, matrix effect of the organic solvents, correlation of benzo[a]pyrene detection ELISA compared to HPLC-FLD in herbal medicine products.\u0000\u0000\u0000\u0000The sandwich ELISA method for B[a]P was validated in linearity (R2 > 0.99), the limit of detection (LOD) (0.080.19 μg/kg) and limit of quantification (LOQ) (0.240.57 μg/kg), accuracy (95.58117.06 %), and precision (3.8010.26 %). The cross-reactivity (CR) was found for B[a]P (100%), CHR (39%), B[b]F (27%), and B[a]A (41%). As a solvent, acetonitrile (MeCN) was used to express the normalized sandwich ELISA calibration curves with benzo[a]pyrene monoclonal antibody (B[a]P-13). The antigen-antibody binding in sandwich ELISA was decreased about 10 times with increasing the salt content (0.0060.18 mol/L phosphate to 20400 mmol/L). The pH range from 6 to 9 was not considered to affect the performance of the sandwich ELISA. Correlation of B[a]P detection in herbal medicines with ELISA compared to HPLC-FLD expressed good correlation (R2 = 0.991) and the slope of the graph for the ELISA (B[a]P-equivalents μg/kg) value divided by the HPLC-FLD (B[a]P μg/kg) value was 0.7292.\u0000\u0000\u0000\u0000Therefore, sandwich ELISA method using benzo[a]pyrene monoclonal antibody (B[a]P-13) could be an alternative screening method for detection of B[a]P in herbal medicine products.\u0000","PeriodicalId":56153,"journal":{"name":"Natural Products Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44422067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}