Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_5944_Библиотеки_им_академика_М_И_Перельмана

Matrine (Figure 3.1(b)), one of the key active constituents of the extracts of the desiccated roots of Sophora flavescens, had significant anti-arrhythmic, anti-fibrotic, and anti-inflammatory, effects. Moreover, matrine considerably inhibited the expression and decrease the central nervous system (CNS) of VCAM-1, and ICAM-1, key adhesive chemokines, and molecules. Li et al. (2013) found that matrine shields against isoproterenol-induced myocardial infarction by the eNOS and irregular dimethylarginine pathway. In the latest years, matrine was also noticed to have anticancer effects, like inducing differentiation, apoptosis, and inhibiting proliferation, in a dose and time­dependent manner, decreasing metastasis and invasion of tumor cells. Matrine could be utilized as an efficient antitumor agent in the therapy of osteosarcoma through directing the caspase-dependent signaling pathway.

Rhynchophylline (Figure 3.2(a)) is a neuroprotective agent quarantined from the Chinese medicinal herb Uncaria rhynchophylla utilized in the treatment of ailments of the CNS. Rhynchophylline is useful for the treatment of the psychological relying on amphetamines, as the down controlling of the n-methyl-D-aspartate receptor. The impacts of rhynchophylline on the proliferation of PC12 cells were also examined (Shen et al., 2010). It was revealed that rhynchophylline downregulates GluN1 expression and suppresses GluA2/3 expression. Researchers had noticed that phynchophylline might endorse the apoptosis of vascular adventitial fibroblasts in the thoracic aorta of instinctively hypertensive rats through regulating the protein expressions of Bax and Bcl-2 (Peixoto et al., 2013). It also could improve the thoracic aorta wall reconstruction and reduce the tail arterial systolic pressure by attenuating the deposition of the extracellular matrix. Isorhynchophylline and rhynchophylline might be effective therapeutic candidates for utilization in the treatment of neurodegenerative diseases escorted by microglial activation. The potential molecular mechanism for isorhynchophylline-mediated and rhynchophylline decrease was associated with the phosphorylation of ERK, p38 MAPKs, suppression of iNOS protein level, and degradation of Iκ Bα.

Jatrorrhizine (Figure 3.2(c)), a new tetrahydroisoquinoline alkaloid, is one of the protoberberine alkaloids taken from the plant Coptis Chinensis, had been utilized for the treatment of a diversity of diseases. It is predicted to be developed as a new gastric prokinetic drug, and its metabolic features

2013). Wang et al. (2013) proposed that jatrorrhizine shields neuronal-like cells besides H

the activation of caspase-3 induced through Aβ and averted cytochrome c transport into the cytosol, signifying the neuroprotective impacts against Aβ-induced injury through the antioxidative potential, which might specify a therapeutic potential for Alzheimer’s disease (AD).

Vincristine (VCR, Figure 3.3(a)), which is an extensively used antineoplastic drug, was joined with a submicron-emulsion drug-delivery system to increase the anti-cancer effect. A novel vireakine, aporphine alkaloid, along with two recognized alkaloids pseudopalmatine and Stephanie, explained for the first time in Stephania rotunda, and five recognized alkaloids tetrahydropalmatine (Figure 3.3(b)), xylopinine (Figure 3.3(c)), roemerine (Figure 3.3(d)), cepharanthine (Figure 3.3(e)), and palmatine (Figure

3.3(f)) were known. The alkaloids were assessed for their cytotoxic and in vitro antiplasmodial activities (Palem et al., 2011). Chen et al. (2013) had verified a series of phenanthrene and benzylisoquinoline alkaloids for their vasorelaxant and antiplatelet actions. Zephgrabetaine has 7 cytotoxic activities. A dose reliance cytotoxic effect was displayed by all of the alkaloids on the cancer cell lines with lycorine (Figure 3.3(g)) and hemanthamine displaying prominent activity (Wang, 2012).

Extracts of plants comprising alkaloids were recognized and used due to their diverse activity thru people of ages. However, ages ago, people did not know direct techniques to isolate pure compounds from identified plant species. Alkaloids in plants generally occur as an aqueous solution in tissues. To isolate them the technique called extraction is generally used. For commercially valuable alkaloids, special extraction techniques were developed (Radwan et al., 2012; Momose et al., 2013). In general, a mixture comprising alkaloids should be dissolved with a certain solvent with reagents. The extraction method permits the recovery of alkaloids from the solution. Then, every alkaloid could be separated from the mixture and got into pure form. To acquire the crystalline form of alkaloids, specific solvents should be utilized. Another method is chromatography. It uses alterations in degrees of adsorption of diverse alkaloids in certain solvent structures on solid materials like alumina or silica (Park et al., 2012; Kan et al., 2013).

Alkaloids displayed relatively diverse medicinal properties. Most of them have local anesthetic properties, however, their practical use is restricted for clinical purposes. Morphine (Figure 3.4(a)) is one of the most renowned alkaloids which had been utilized and still are for medical purposes. This alkaloid is an influential narcotic that is utilized for pain relief; however, its usefulness is restricted due to addictive properties (Li et al., 2012).