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https://www.readbyqxmd.com/read/29141127/in-vivo-disease-control-efficacy-of-isoquinoline-alkaloids-isolated-from-corydalis-ternata-against-wheat-leaf-rust-and-pepper-anthracnose
#1
Jae Woo Han, Sang Hee Shim, Kyoung Soo Jang, Yong Ho Choi, Hun Kim, Gyung Ja Choi
Phytochemicals have been considered as alternatives for synthetic fungicides because of their biodegradability and low toxicity. In this study, we found that the methanolic extract of Corydalis ternata suppressed the development of plant diseases caused by Puccinia triticina and Colletotrichum coccodes. As an antifungal substance, three isoquinoline alkaloids (dehydrocorydaline, stylopine, and corydaline) were isolated from C. ternata. These active compounds also exhibited an in vivo antifungal activity against P...
November 15, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29141066/vancomycin-infiltrate-induced-dermatitis-mimicking-bullous-cellulitis
#2
Sowmya Nanjappa, Matthew Snyder, John N Greene
<p>Extravasation of medications can manifest as tenderness, pain, tissue necrosis, and thrombophlebitis and lead to infection and severe long-term complications. Risk factors for leakage of medications include mechanical and pharmacologic mechanisms such as cannulation technique, vasoconstriction, and cytotoxicity. Well-known vesicants like anthracyclines, vinca alkaloids, and vasopressors are usually administered with proper caution. Often overlooked are many antimicrobial agents, which typically act via differences in osmolality and pH...
November 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29140075/strictosidine-synthase-triggered-enantioselective-synthesis-of-n-substituted-s-3-14-18-19-tetrahydroangustines-as-novel-topoisomerase-i-inhibitors
#3
Yunrui Cai, Huajian Zhu, Zaccary Alperstein, Wenjun Yu, Artem Cherkasov, Hongbin Zou
Monoterpenoid indole alkaloids (MIAs) comprise an important class of molecules for drug discovery, and these have variant carbon skeletons with prominent bioactivities. For instance, in spite of limitations to their use, camptothecins are the only clinically approved Topoisomerase I (Top1) inhibitors. The enzyme STR1, which is key for MIA biosynthesis, was applied to the enantioselective preparation of three N-substituted (S)-3,14,18,19-tetrahydroangustine (THA) derivatives. These non-camptothecin MIAs were shown to have moderate in vitro HepG2 cytotoxicity and Top1 inhibition activities...
November 15, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/29139263/-next-generation-sequencing-and-transcriptome-analysis-of-root-bark-from-paeonia-suffruticosa-cv-feng-dan
#4
Dong-Mei Xie, Nian-Jun Yu, Lu-Qi Huang, Dai-Yin Peng, Cong-Bin Liu, Yue-Jian Zhu, Hao Huang
Moutan Cortex is an important traditional Chinese medicine, "Fengdan Pi" was known as Dao-di herbs from the root bark of Paeonia suffruticosa cv. Feng Dan for its extracted various active components. However, the genetic basis for their activity is virtually unknown. The transcriptome of the root bark from "Fengdan" was sequenced using the Illumina HiSeq 4000 sequencing platform. The clean reads were then de novo assembled into 72 997 unigenes. Among them, the number of unigenes which could been annotated by dataset Nr and GO was 41 139 and 34 592...
August 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29138869/cepharanthine-exhibits-a-potent-anticancer-activity-in-p53-mutated-colorectal-cancer-cells-through-upregulation-of-p21waf1-cip1
#5
Arkornnut Rattanawong, Vilawan Payon, Wacharee Limpanasittikul, Chatikorn Boonkrai, Apiwat Mutirangura, Piyanuch Wonganan
Cepharanthine (CEP), a biscoclurine alkaloid isolated from Stephania cepharantha Hayata, has demonstrated anticancer activity in several different types of cancer cells. Colorectal cancer (CRC) is one of the most common cancers in both men and women. Mutated p53 in CRC was reported to be associated with resistance to commonly used chemotherapeutic agents including, 5‑fluorouracil, oxaliplatin and irinotecan. Many studies reported that mutation of p53 induced chemoresistance through several mechanisms, including induction of drug efflux, disruption of cell cycle regulation, evasion of apoptosis and upregulation of DNA repair...
November 9, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29137206/ancient-food-habits-dictate-that-food-can-be-medicine-but-medicine-cannot-be-food
#6
Hit Kishore Goswami, Hitendra Kumar Ram
Background: Extensive surveys of several population settlements in different parts of India-covering plains, mountains, valleys, river banks and deeper areas of forests at different altitudes-between 1968 and 2016 demonstrated that the basic vital need of hunger is being fulfilled since antiquity by plants in the wild. Methods: Based on collections, consultations with local population personnel and literature searches, this paper presents many plants that are commonly used as food and focuses on their products, which are rich in alkaloids, polysaccharides, steroids, terpenoids, flavonoids, aminoacids, fatty acids and antibiotics etc...
November 13, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/29137152/synthesis-and-in-vitro-antiproliferative-activity-of-11-substituted-neocryptolepines-with-a-branched-%C3%AF-aminoalkylamino-chain
#7
Elkhabiry Shaban, Marta Świtalska, Li Wang, Ning Wang, Fan Xiu, Ikuya Hayashi, Tran Anh Ngoc, Sachie Nagae, Samah El-Ghlban, Shiho Shimoda, Ahmed Abdel Aleem El Gokha, Ibrahim El Tantawy El Sayed, Joanna Wietrzyk, Tsutomu Inokuchi
Neocryptolepine, which is a kind of tetracyclic indoloquinoline alkaloid, exhibits the inhibition of topoisomerase II and shows antiproliferative activity. The present study describes the synthesis and antiproliferative evaluation of several neocryptolepine analogues carrying a branched, functionalized dibasic side chain at C11. These 2-substituted 5-methyl-indolo[2,3-b]quinoline derivatives were prepared by nucleophilic aromatic substitution (SNAr) of 11-chloroneocryptolepines with appropriate 1,2- and 1,3-diamines...
November 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29137125/new-2-methoxy-acetylenic-acids-and-pyrazole-alkaloids-from-the-marine-sponge-cinachyrella-sp
#8
Amin Mokhlesi, Rudolf Hartmann, Tibor Kurtán, Horst Weber, Wenhan Lin, Chaidir Chaidir, Werner E G Müller, Georgios Daletos, Peter Proksch
Three new 2-methoxy acetylenic acids (1-3) and a known derivative (4), in addition to three new natural pyrazole alkaloids (5-7) were isolated from an Indonesian marine sponge of the genus Cinachyrella. Compounds 5 and 6 have previously been reported as synthetic compounds. The structures of the new compounds were established on the basis of one- and two-dimensional NMR spectroscopy as well as by mass spectrometric data. The absolute configuration of the new acetylenic acid derivatives (1-3) was established by ECD spectroscopy...
November 11, 2017: Marine Drugs
https://www.readbyqxmd.com/read/29136553/determination-of-tropane-alkaloids-by-heart-cutting-reversed-phase-strong-cation-exchange-two-dimensional-liquid-chromatography
#9
Zhen Long, Yanhai Zhang, Paul Gamache, Zhimou Guo, Frank Steiner, Nana Du, Xiaoda Liu, Yan Jin, Xingguo Liu, Lvye Liu
Current Chinese Pharmacopoeia (ChP) standards apply liquid extraction combined with one dimensional liquid chromatography (1DLC) method for determining alkaloids in herbal medicines. The complex pretreatments lead to a low analytical efficiency and possible component loss. In this study, a heart cutting reversed phase - strong cation exchange two dimensional liquid chromatography (RP - SCX 2DLC) approach was optimized for simultaneously quantifying tropane alkaloids (anisodine, scopolamine and hyoscyamine) in herbal medicines and herbal medicine tablets without further treatment of the filtered extract...
November 2, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29135964/the-killer-of-socrates-coniine-and-related-alkaloids-in-the-plant-kingdom
#10
REVIEW
Hannu Hotti, Heiko Rischer
Coniine, a polyketide-derived alkaloid, is poisonous to humans and animals. It is a nicotinic acetylcholine receptor antagonist, which leads to inhibition of the nervous system, eventually causing death by suffocation in mammals. Coniine's most famous victim is Socrates who was sentenced to death by poison chalice containing poison hemlock in 399 BC. In chemistry, coniine holds two historical records: It is the first alkaloid the chemical structure of which was established (in 1881), and that was chemically synthesized (in 1886)...
November 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29134077/investigation-of-the-acid-base-behaviour-of-the-opium-alkaloid-thebaine-in-lc-esi-ms-mobile-phase-by-nmr-spectroscopy
#11
Michelle G Carlin, John R Dean, Jonathan L Bookham, Justin J B Perry
As part of a research programme to establish an analytical method for the simultaneous detection of the five major opium alkaloids in poppy seeds by liquid chromatography-electrospray ionization-mass spectrometry (LC-ESI-MS) it was discovered that the inclusion of thebaine produced two peaks for the same compound. This was in contrast to the effective simultaneous detection, by LC-ESI-MS, of morphine, codeine, papaverine and noscapine. The presence of these two peaks for thebaine was investigated using nuclear magnetic resonance spectroscopy with deuterated solvents to emulate the mobile phase conditions experienced...
October 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/29133815/lc-ms-guided-isolation-of-three-pairs-of-enantiomeric-alkaloids-from-macleaya-cordata-and-their-enantioseparations-antiproliferative-activity-apoptosis-inducing-property
#12
Chunmei Sai, Dahong Li, Shengge Li, Tong Han, Yongzhi Guo, Zhanlin Li, Huiming Hua
(±)-Macleayins F-H (1-3), three pairs of new enantiomeric alkaloid dimers, along with four known alkaloids (4-7) as their plausible biogenetic precursors, were isolated from the aerial parts of Macleaya cordata. Compounds 1-3 were obtained under the guidance of LC-MS investigation, and their structures were elucidated by analysis of the 1D and 2D NMR spectroscopic data. The racemic mixtures were successfully separated by chiral HPLC, and the absolute configurations of enantiomers were determined by electronic circular dichroism (ECD) spectroscopy...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29133056/therapeutic-potential-of-songorine-a-diterpenoid-alkaloid-of-the-genus-aconitum
#13
REVIEW
Haroon Khan, Seyed Mohammad Nabavi, Antoni Sureda, Nikolay Mehterov, Diana Gulei, Ioana Berindan-Neagoe, Hiroaki Taniguchi, Atanas G Atanasov
Alkaloids are well-studied secondary metabolites, with recent preclinical studies evidencing that many of them exhibit anti-cancer, anti-depressant, anti-nociceptive, anti-inflammatory, anti-pyretic, anti-platelet, anti-oxidant, and anti-bacterial properties. Aconitum is a genus rich of diverse alkaloids. More than 450 alkaloids have been identified in a variety of species. Songorine is a C20 diterpenoid alkaloid and 12-keto analog of napelline, isolated from Aconitum soongaricum and was associated with a heterogeneous panel of biological functions...
November 10, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29133049/design-and-synthesis-of-novel-c14-urea-tetrandrine-derivatives-with-potent-anti-cancer-activity
#14
Junjie Lan, Lan Huang, Huayong Lou, Chao Chen, Tangjingjun Liu, Shengcao Hu, Yao Yao, Junrong Song, Jun Luo, Yazhou Liu, Bin Xia, Lei Xia, Xueyi Zeng, Yaacov Ben-David, Weidong Pan
Tetrandrine is a dibenzyltetrahydroisoquinoline alkaloid, isolated from traditional Chinese medicinal plant Stephania tetrandra, with anti-tumor activity. Our previous study identified several derivatives of tetrandrine showing better activities than parental compound against human hepatocellular carcinoma cells. To increase diversity and cytotoxic activities of the original compound, a series of novel 14-urea-tetrandrine derivatives were synthesized through structural modification of tetrandrine. These derivaties demonstrated a moderate to strong anti-proliferative activities against human cell lines HEL and K562 (Leukemia), prostate (PC3), breast (MDA-MB-231) and melanoma (WM9)...
November 6, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29131648/treatment-of-vinca-minor-leaves-with-methyl-jasmonate-extensively-alters-the-pattern-and-composition-of-indole-alkaloids
#15
Sara Abouzeid, Ulrike Beutling, Frank Surup, Fatma M Abdel Bar, Mohamed M Amer, Farid A Badria, Mahdi Yahyazadeh, Mark Brönstrup, Dirk Selmar
Alkaloids extracted from mature Vinca minor leaves were fractionated by preparative HPLC. By means of HRMS and NMR data, the main alkaloids were identified as vincamine, strictamine, 10-hydroxycathofoline, and vincadifformine. Upon treatment with methyl jasmonate (MeJA), the pattern and composition of the indole alkaloids changed extensively. While 10-hydroxycathofoline and strictamine concentrations remained unaltered, vincamine and vincadifformine levels showed a dramatic reduction. Upon MeJA treatment, four other indole alkaloids were detected in high quantities...
November 13, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/29131616/antiproliferative-dimeric-aporphinoid-alkaloids-from-the-roots-of-thalictrum-cultratum
#16
Da-Hong Li, Jian-Yong Li, Chun-Mei Xue, Tong Han, Chun-Mei Sai, Kai-Bo Wang, Jin-Cai Lu, Yong-Kui Jing, Hui-Ming Hua, Zhan-Lin Li
Inspired by the intriguing structures and bioactivities of dimeric alkaloids, 11 new thalifaberine-type aporphine-benzylisoquinoline alkaloids, thalicultratines A-K, a tetrahydroprotoberberine-aporphine alkaloid, thalicultratine L, and five known ones were isolated from the roots of Thalictrum cultratum. Their structures were defined on the basis of NMR and HRESIMS data. The antiproliferative activities of compounds 1-17 were evaluated against human leukemia HL-60 and prostate cancer PC-3 cells. Most alkaloids showed potent cytotoxicity against selected cancer cells...
November 13, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/29131472/total-syntheses-of-the-monoterpenoid-indole-alkaloids-%C3%A2-alstoscholarisine-b-and-c
#17
Steven M Weinreb, Jeremy D Mason
Total syntheses of the monoterpenoid indole alkaloids (±)-alstoscholarisine B (2) and C (3) have been accomplished starting from readily available indole-2-acetic ester 6 and unsaturated N-sulfonyllactam 7.
November 13, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/29130618/the-taste-of-toxicity-a-quantitative-analysis-of-bitter-and-toxic-molecules
#18
Ido Nissim, Ayana Dagan-Wiener, Masha Y Niv
The role of bitter taste-one of the few basic taste modalities-is commonly assumed to signal toxicity and alert animals against consuming harmful compounds. However, it is known that some toxic compounds are not bitter and that many bitter compounds have negligible toxicity while having important health benefits. Here we apply a quantitative analysis of the chemical space to shed light on the bitterness-toxicity relationship. Using the BitterDB dataset of bitter molecules, The BitterPredict prediction tool, and datasets of toxic compounds, we quantify the identity and similarity between bitter and toxic compounds...
November 11, 2017: IUBMB Life
https://www.readbyqxmd.com/read/29130543/medicinal-plants-of-the-genus-macleaya-macleaya-cordata-macleaya-microcarpa-a-review-of-their-phytochemistry-pharmacology-and-toxicology
#19
REVIEW
Li Lin, Yan-Chun Liu, Jia-Lu Huang, Xiu-Bin Liu, Zhi-Xing Qing, Jian-Guo Zeng, Zhao-Ying Liu
In the genus Macleaya, Macleaya cordata and Macleaya microcarpa have been recognized as traditional herbs that are primarily distributed in China, North America, and Europe and have a long history of medicinal usage. These herbs have been long valued and studied for detumescence, detoxification, and insecticidal effect. This review aims to provide comprehensive information on botanical, phytochemical, pharmacological, and toxicological studies on plants in the genus Macleaya. Plants from the genus of Macleaya provide a source of bioactive compounds, primarily alkaloids, with remarkable diversity and complex architectures, thereby having attracted attention from researchers...
November 12, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29130495/matrine-reversed-multidrug-resistance-of-breast-cancer-mcf-7-adr-cells-through-pi3k-akt-signal-pathway
#20
Bing-Gang Zhou, Chang-Sheng Wei, Song Zhang, Zhi Zhang, Huan-Min Gao
Matrine is an alkaloid extracted from a Chinese herb Sophora flavescens Ait, and has been used clinically for breast cancer with marked therapeutic efficacy in China. However, the mechanism has not been well known. Thus the present study was to explore if Matrine reverse multidrug resistance for breast cancer cells though regulating PI3K/AKT signal pathway. Methyl thiazolyl tetrazolium (MTT) assay was used to detect the inhibitory action; Annexin V to detect apoptosis; Fluorospectrophotometry to examine intracellular adriamycin (ADR) accumulation and Western-blot to label the proteins of P-glycoprotein(P-gp), MRP1, PTEN, p-AKT, Bcl-2, Bax and Caspase-3...
November 11, 2017: Journal of Cellular Biochemistry
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