(n.) A genus of tropical trees and shrubs of the order Loganiaceae. See Nux vomica.
Example Sentences:
(1) The literature on the alkaloids and pharmacology of Asian Strychnos species is reviewed (altogether 99 plant names are considered) and compared with the findings obtained in the present work.
(2) Strychnos henningsii Gilg is used in African traditional medicine for the treatment of various ailments, including rheumatism, gastrointestinal complaints and snake bites.
(3) This paper reports the determination of strychnine and brucine in different parts of Semen Strychni (the seeds of Strychnos nux-vomica and S. pierriana), and makes a comparison of the contents between the crude forms and processed products of the two seeds.
(4) Two supposedly Strychnos-based Semai Senoi dart poisons from Western Malaysia, ipoh akar and lampong, and their accompanying plant materials have been re-investigated botanically, chemically, and pharmacologically.
(5) This paper describes the powerful cytotoxic action exerted by strychnopentamine (SP), a dimeric indole alkaloid extracted from Strychnos usambarensis Gilg, on B16 melanoma cells and on non-cancer human fibroblasts cultured in vitro.
(6) and alkaloids probably from different forms of Strychnos ignatii P. Bergius.
(7) The history to about 1850 of the muscle-relaxant poison curare is discussed, especially the developments leading to the botanical identification of the plants that yield the alkaloidal active principles: Loganiaceae (Strychnos species) and Menispermaceae (Abuta, Chondrodendron, and Curarea species).
(8) Bisnordihydrotoxiferine, a dimeric tertiary indole alkaloid obtained from the root bark of Strychnos trinervis (Vell.)
(9) The ethnobotanical uses of South American species of Strychnos L. (Loganiaceae) are reviewed, with the exception of their major rôle in the preparation of curare, which will be dealt with in detail elsewhere.
(10) Bisnordihydrotoxiferine has been isolated as the major alkaloid from the root bark of Strychnos trinervis.
(11) In the stem bark of Strychnos dolichothyrsa Gilg ex Onochie et Hepper (Loganiaceae) the following alkaloids were found: bisnor-dihydrotoxiferine, bisnor-C-curarine, bisnor-dihydrotoxiferine N-oxide and bisnor-dihydrotoxiferine di-N-oxide.
(12) Two hundred thirty-four samples from thirty-six Asian species of Strychnos have been screened for the presence of tertiary alkaloids; the data are set out in table 1.
(13) The potential cytotoxic activities of 46 alkaloids isolated from different Strychnos species were tested on different cancer or normal cells cultured in vitro.
(14) Contents of strychnine and brucine in dry seeds of Strychnos nux-vomica and its preparations were determined by gas chromatography.
(15) The occurrence and pharmacology of the (non-curarizing) alkaloids known to be present in South American Strychnos species is reviewed.
(16) The Strychnos dinklagei alkaloid and ellipticine-metabolite 13-oxoellipticine (8) has been synthesized from indole (4) in seven steps and 38% yield.
(17) The chemical separation and identification of ten alkaloids extracted from the roots of Strychnos usambarensis are described.
(18) In the course of our study on the drug-processing of the seeds of Strychnos nux-vomica L. (Loganiaceae), the alkaloid composition of the heat-treated seeds of S. nux-vomica was compared to that of the untreated seeds.
(19) Seven alkaloids isolated from Strychnos usambarensis have been assessed for in vitro activities against Entamoeba histolytica and Plasmodium falciparum and for in vivo activity against Plasmodium berghei in mice.
(20) Three alkaloids of the stem bark of Strychnos dolichothyrsa Gilg ex Onochie et Hepper (Loganiaceae) were isolated and identified as caracurine V and its mono- and di-N-oxide by comparison with synthesized compounds.
Upas
Definition:
(n.) A tree (Antiaris toxicaria) of the Breadfruit family, common in the forests of Java and the neighboring islands. Its secretions are poisonous, and it has been fabulously reported that the atmosphere about it is deleterious. Called also bohun upas.
(n.) A virulent poison used in Java and the adjacent islands for poisoning arrows. One kind, upas antiar, is, derived from upas tree (Antiaris toxicaria). Upas tieute is prepared from a climbing plant (Strychnos Tieute).
Example Sentences:
(1) Binding of uPA to filters was blocked by a synthetic oligopeptide containing the known receptor binding region of native uPA.
(2) The synthesis of uPA as a precursor with reduced enzymatic activity as well as decreased affinity for inhibitors is likely to be a mechanism by which normal epidermis regulates plasminogen activation in vivo.
(3) We identified two human melanoma cell lines, MelJuso and MeWo, expressing uPA or tPA as shown at mRNA, protein, and enzyme activity level.
(4) The Jarman UPA score at electoral ward level is not related to psychiatric morbidity, and should not therefore be used for planning local service provision.
(5) Mutants of the pig kidney cell line, LLC-PK1, affected in cAMP metabolism, were examined for cAMP-dependent protein kinase (cAMP-PK) activity and for cAMP-mediated induction of urokinase-type plasminogen activator (uPA).
(6) Since in addition to fibronectin, that can be degraded by uPA or plasmin, chorioallantoic membrane connective tissue contains collagen, we examined the profile of collagenases secreted by the various cell lines in search for an activity that would coincide with the invasive phenotype.
(7) Rat alveolar epithelial cells produce large quantities of urokinase-type plasminogen activator (uPA) in vitro, and uPA expression is modulated in association with cellular differentiation and exposure to inflammatory mediators.
(8) Immunoreactive uPA was induced equally by IFN and TNF, but TNF generated higher levels of PAI-2.
(9) Thus, cathepsin B can substitute for plasmin in the proteolytic activation of pro-uPA to enzymatically active HMW-uPA.
(10) Plasmin formation, dependent on the urokinase-type plasminogen activator (uPA), is discussed in its biochemical, regulatory and physiological aspects and its involvement in cancer malignancy analysed.
(11) (iv) At high concentrations of sigma factor, only certain adenosine-containing dinucleoside monophosphates (ApU, CpA, UpA, and ApA) stimulate the reaction.
(12) The peptide hormone calcitonin induces the accumulation of urokinase-type plasminogen activator (uPA) mRNA in pig kidney LLC-PK1 cells.
(13) PA activity was also associated with the leading edges of migrating epithelium post-scrape and post-burn and was not inhibited by antibodies to either tPA or uPA but was inhibited by amiloride.
(14) However, the RNase A mutant containing residues 63-74 of angiogenin had greatly diminished catalytic activity against uridylyl-(3'----5')-adenosine (UpA), and slightly increased catalytic activity as an inhibitor of translation in vitro.
(15) Hence receptor-bound uPA will promote plasminogen activation and thus the dissolution of the tumor matrix and the basement membrane which is a prerequisite for invasion and metastasis.
(16) Treatment of A431 squamous carcinoma cells (SqCC) with epidermal growth factor (EGF) has previously been shown to result in an induction of the synthesis and extracellular accumulation of uPA and the plasminogen-dependent proteolysis of extracellular matrix (ECM).
(17) Enzymatic properties of phosphorylated urokinase plasminogen activator (P-uPA) (1) extracted from human carcinomatous cell line Detroit 562 cells were compared with those of non-phosphorylated uPA of urinary origin (nP-uPA).
(18) In all of 10 cases, staining for uPA in the normal colon tissue was confined to scattered fibroblastlike cells in the lamina propria.
(19) It is proposed that uPA:uPA-receptor interaction plays a direct role in physiological and pathological processes that require cell migration.
(20) High molecular weight uPA, either as the single-chain precursor or two-chain activated form, bound to the receptor; however, low molecular weight (33 kD) uPA, tPA, or epidermal growth factor did not compete for binding, demonstrating specificity.