scholarly journals Vasodilator activity of extracts of field Alpinia purpurata (Vieill) K: Schum and A. zerumbet (Pers.) Burtt et Smith cultured in vitro

2009 ◽  
Vol 45 (3) ◽  
pp. 507-514 ◽  
Author(s):  
Cristiane Pimentel Victório ◽  
Ricardo Machado Kuster ◽  
Roberto Soares de Moura ◽  
Celso Luiz Salgueiro Lage
Keyword(s):  
Phenolic Compounds ◽  
Causes Of Death ◽  
Wistar Rat ◽  
Pharmacological Activities ◽  
Vasodilator Effect ◽  
Vasodilator Activity ◽  
Mesenteric Vascular Bed ◽  
Alpinia Purpurata ◽  
First Time

Nowadays, the high blood pressure is one of the main causes of death and cardiovascular diseases. Vasodilator drugs are frequently used to treat arterial hypertension. Experiments were undertaken to determine whether hydroalcoholic extracts obtained from leaves of field-grown Alpinia purpurata and A. zerumbet cultured in vitro under different plant growth regulators induce a vasodilator effect on Wistar rat mesenteric vascular bed pre-contracted with norepinephrine. Plant extracts were able to induce a long-lasting endothelium-dependent vasodilation. Efficiency on activity of A. purpurata reached 87% at concentration of 60 μg. The extract of A. zerumbet maintained in medium containing IAA, induced the relaxation (17.4%) at 90 μg, as compared to the control (MS0) that showed a better vasodilator effect (60%). These results are in agreement with the quantification of phenolic compounds in the extracts, which were 50% lower for those plants cultured in IAA. A. purpurata was assayed for the first time in relation to its vasodilator activity. This paper showed a strong probability of correlation between the pharmacological activities of A. purpurata with their content in phenolic compounds.

scholarly journals Antifungal Activity and DNA Topoisomerase Inhibition of Hydrolisable Tannins from Punica granatum L.

2021 ◽  
Vol 22 (8) ◽  
pp. 4175
Author(s):  
Virginia Brighenti ◽  
Ramona Iseppi ◽  
Luca Pinzi ◽  
Annamaria Mincuzzi ◽  
Antonio Ippolito ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antifungal Activity ◽  
Active Compound ◽  
Fungal Pathogens ◽  
Fungal Infections ◽  
Punica Granatum ◽  
Human Pathogens ◽  
First Time ◽  
Punica Granatum L

Punica granatum L. (pomegranate) fruit is known to be an important source of bioactive phenolic compounds belonging to hydrolysable tannins. Pomegranate extracts have shown antifungal activity, but the compounds responsible for this activity and their mechanism/s of action have not been completely elucidated up to now. The aim of the present study was the investigation of the inhibition ability of a selection of pomegranate phenolic compounds (i.e., punicalagin, punicalin, ellagic acid, gallic acid) on both plant and human fungal pathogens. In addition, the biological target of punicalagin was identified here for the first time. The antifungal activity of pomegranate phenolics was evaluated by means of Agar Disk Diffusion Assay and minimum inhibitory concentration (MIC) evaluation. A chemoinformatic analysis predicted for the first time topoisomerases I and II as potential biological targets of punicalagin, and this prediction was confirmed by in vitro inhibition assays. Concerning phytopathogens, all the tested compounds were effective, often similarly to the fungicide imazalil at the label dose. Particularly, punicalagin showed the lowest MIC for Alternaria alternata and Botrytis cinerea, whereas punicalin was the most active compound in terms of growth control extent. As for human pathogens, punicalagin was the most active compound among the tested ones against Candida albicans reference strains, as well as against the clinically isolates. UHPLC coupled with HRMS indicated that C. albicans, similarly to the phytopathogen Coniella granati, is able to hydrolyze both punicalagin and punicalin as a response to the fungal attack. Punicalagin showed a strong inhibitory activity, with IC50 values of 9.0 and 4.6 µM against C. albicans topoisomerases I and II, respectively. Altogether, the results provide evidence that punicalagin is a valuable candidate to be further exploited as an antifungal agent in particular against human fungal infections.

scholarly journals Identification of Compounds With Vasoactive Properties in a Pitaya Juice Extract (Stenocereus griseus)

2021 ◽  
Vol 5 (Supplement_2) ◽  
pp. 362-362
Author(s):  
Yadira Ramírez Rodríguez ◽  
Karina Robledo Márquez ◽  
Ricardo Espinosa Tanguma ◽  
Alejandra Medina Hernández ◽  
Francisco Bautista-Redonda ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Wistar Rats ◽  
In Vitro Models ◽  
Physiological Solution ◽  
Action Mechanism ◽  
Vasodilator Effect ◽  
Funding Sources ◽  
Male Wistar Rats

Abstract Objectives The objective of this study is to identify the vasoactive compounds present in the pitaya juice extract (PJE) and evaluate its effect using in vivo and in vitro models. Methods First, the pitaya juice was obtained from the fruit of Stenocereus Griseus, centrifuged to obtain PJE. Six hundred mL of PJE was frozen until its use and other 600 mL was lyophilized and stored. The lyophilized PJE was analyzed by HPLC-PAD. The wavelengths for detection in the PAD system were 535 and 480 nm for betalains, and 370 and 280 nm for phenolic compounds. On the other hand, the vasoactive effect of PJE was evaluated in isolated rings of thoracic aortas, with (n = 5) and without endothelium (n = 5), of male Wistar rats (250–350 g) previously contracted with phenylephrine (10 mM to 10 μmol/L), followed by the administration of a concentration of 20 mg/mL of lyophilized PJE and 1 mL physiological solution, as a control (30 min of treatment). Results The profiling of lyophilized PJE by HPLC-PAD showed 16 types of betalains and 31 types of phenolic compounds, which will be analyzed by mass spectrometry. Isolated aortic rings (in presence and absence of the endothelium) administered with PJE showed 8-fold greater vasodilation compared to the control (54.3% ± 14.1 vs 6.7% ± 3.7), suggesting that the compounds present in the PJE may exert a vasodilator effect, of which its action mechanism will be investigated. Conclusions Pitaya juice extract contains vasoactive compounds such as betalains and phenolic compounds, which could be responsible for PJE exerting a vasodilator effect that was observed in assays of isolated rat aortic rings. Funding Sources 1. Consejo Nacional de Ciencia y Tecnología (CONACYT) 2. Instituto Potosino de Investigación Científica y Tecnológica A.C. (IPICYT).

scholarly journals Phenolic Compound Composition and Biological Activities of Fractionated Soybean Pod Extract

2021 ◽  
Vol 11 (21) ◽  
pp. 10233
Author(s):  
Marzena Pabich ◽  
Beata Marciniak ◽  
Renata Kontek
Keyword(s):  
Phenolic Compounds ◽  
Cytotoxic Activity ◽  
Phenolic Compound ◽  
Biological Activities ◽  
Ethanolic Extract ◽  
Total Content ◽  
Food Additive ◽  
Anti Cancer ◽  
First Time

The objective of this study was to determine the potential of dry extracts from soybean pods as a source of bioactive compounds. The phenolic compound composition of the extract (E) and fraction (F1-F3) as well as their respective lipophilicity were analyzed by UPLC-ESI-QTOF-MS. The biological activity as measured by antioxidant and cytotoxic activity was also evaluated. The in vitro anticancer potential of the ethanolic extract and fraction of soybean pods was measured through MTT assay using human colorectal carcinoma (HTC-116) and prostate cancer (PC-3) cell lines. The F2 fraction, with medium lipophilicity, produced the most pronounced cytotoxic effect in PC-3 cells. Analysis of Pearson’s correlation demonstrated a high relationship between the content of phenolic compounds, the antioxidant activity of the extract and fractions, and cytotoxic activity towards PC-3 cells. UPLC-ESI-QTOF-MS analysis of soybean pod extract resulted in putative identification of 50 polyphenols belonging to three different chemical families (phenolic acids, flavonoids, and other polyphenols), the first time such an analysis has been performed. Among the fractions with variable lipophilicity, fraction F2 was the most abundant in phenolic compounds. This was confirmed in the quantitative analysis, as a result of which the highest total content of phenolic compounds was found in the extract (E) and fraction F2. Soybean pods might be useful material for obtaining preparations with anti-radical and anti-cancer properties. They can also be an active food additive or a component in dietary supplements.

scholarly journals Biologically Active Compounds in Stizolophus balsamita Inflorescences: Isolation, Phytochemical Characterization and Effects on the Skin Biophysical Parameters

2021 ◽  
Vol 22 (9) ◽  
pp. 4428
Author(s):  
Joanna Nawrot ◽  
Jaromir Budzianowski ◽  
Gerard Nowak ◽  
Iwona Micek ◽  
Anna Budzianowska ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Human Fibroblasts ◽  
Transepidermal Water Loss ◽  
Biological Properties ◽  
Biologically Active ◽  
Biophysical Parameters ◽  
Cytotoxic Effects ◽  
Active Compounds ◽  
First Time

Three germacranolides, as well as five flavonoids, natural steroid and simple phenolic compounds, were isolated from the inflorescence of Stizolophus balsamita growing in Iran. The paper presents active compounds found for the first time in the inflorescence of this species. The flavonoids, simple phenolic compounds and natural steroids have been isolated for the first time in the genus Stizolophus. The MTT assay was employed to study in vitro cytotoxic effects of the taxifolin against human fibroblasts. We also evaluate the possible biological properties/cosmetic effects of Stizolophus balsamita extract and taxifolin on the human skin. Sixty healthy Caucasian adult females with no dermatological diseases were investigated. We evaluate the effects of S. balsamita extract and taxifolin on skin hydration and transepidermal water loss (TEWL). It was revealed that S. balsamita extract might decrease TEWL level and fixed the barrier function of the epidermis. The presence of bioactive phytochemical constituents in S. balsamita inflorescences makes them a valuable and safe source for creating new cosmetics and medicines.

Phenolic compounds from in vitro cultures of Rindera graeca Boiss. & Feldr.

Planta Medica ◽  
2013 ◽  
Vol 79 (13) ◽  
Author(s):  
K Sykłowska-Baranek ◽  
A Pietrosiuk ◽  
K Graikou ◽  
H Damianakos ◽  
M Jeziorek ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
In Vitro Cultures

Inhibition by Phenol and Phenolic Acids of Platelet Release Reaction

1973 ◽  
Vol 30 (02) ◽  
pp. 334-338 ◽  
Author(s):  
Felisa C. Molinas
Keyword(s):  
Renal Failure ◽  
Phenolic Compounds ◽  
Phenolic Acids ◽  
Platelet Function ◽  
Deleterious Effect ◽  
Release Reaction ◽  
Contributory Factors ◽  
Adp Release ◽  
Platelet Release

SummaryIt has been postulated that the high phenol and phenolic acids plasmatic levels found in patients with chronic renal failure are contributory factors in the abnormal platelet function described in these patients. This hypothesis was corroborated by “in vitro” studies showing the deleterious effect of these compounds on certain platelet function after pre-incubation of PRP with phenol and phenolic compounds. The present studies were conducted to determine the influence of phenolic compounds on platelet release reaction. It was found that phenol inhibited from 62.5 to 100% the effect of the aggregating agents thrombin, adrenaline and ADP on platelet 5-HT-14C release. The phenolic acids p-, m-, and o-HPAA inhibited from 36.35 to 94.8% adrenaline and ADP-induced platelet 5-HT-14C release. Adrenaline-induced platelet ADP release was inhibited from 27.45 to 38.10% by the phenolic compounds. These findings confirm the hypothesis that phenolic compounds interfere with platelet function through the inhibition of the release reaction.

Somatic Embryogenesis and In vitro Plant Regeneration in Vigna trilobata (L.) Verd. - A Potential Pasture Legume

1970 ◽  
Vol 19 (1) ◽  
pp. 89-99
Author(s):  
K. Choudhary ◽  
M. Singh ◽  
M. S. Rathore ◽  
N. S. Shekhawat
Keyword(s):  
Somatic Embryogenesis ◽  
Growth Regulators ◽  
Somatic Embryos ◽  
Basal Medium ◽  
Long Term Study ◽  
Continuous Application ◽  
First Time ◽  
Pasture Legume

This long term study demonstrates for the first time that it is possible to propagate embryogenic Vigna trilobata and to subsequently initiate the differentiation of embryos into complete plantlets. Initiation of callus was possible on 2,4-D. Somatic embryos differentiated on modified MS basal nutrient medium with 1.0 mg/l  of 2,4-D and 0.5 mg/l  of Kn. Sustained cell division resulted in globular and heart shape stages of somatic embryos. Transfer of embryos on to a fresh modified MS basal medium with 0.5 mg/l of Kn and 0.5 mg/l of GA3 helped them to attain maturation and germination. However, the propagation of cells, as well as the differentiation of embryos, were inhibited by a continuous application of these growth regulators. For this reason, a long period on medium lacking these growth regulators was necessary before the differentiation of embryos occurred again. The consequences for improving the propagation of embryogenic cultures in Vigna species are discussed. Key words: Pasture  legume, Vigna trilobata, Globular, Heart shape, somatic embryogenesis D.O.I. 10.3329/ptcb.v19i1.4990 Plant Tissue Cult. & Biotech. 19(1): 89-99, 2009 (June)

Dwindling status of Epimedium Elatum (Morren & Decne) and its geographical distribution in Kashmir Himalaya, India

2018 ◽  
pp. 47-52
Keyword(s):  
Medicinal Plant ◽  
Biological Activities ◽  
Conservation Status ◽  
Natural Populations ◽  
Culture Techniques ◽  
Kashmir Himalayas ◽  
Near Future ◽  
First Time ◽  
Tissue Culture Techniques

Epimedium elatum (Morren & Decne) of family Berberidaceace is a rare perennial medicinal plant, endemic to high altitude forests of Northwestern Himalayas in India. Ethnobotanically, it has been used as an ingredient for treatment of bone-joint disorders, impotence and kidney disorders in Kashmir Himalayas. Phytochemically, it is rich in Epimedin ABC and Icariin; all of these have been demonstrated to possess remarkable biological activities like PDE-5 inhibition (treatment of erectile dysfunction), anticancer, antiosteoporosis antioxidant and antiviral properties. The present investigation reports its traditional usage, comprehensive distribution and conservation status from twenty ecogeographical regions in Kashmir Himalayas, India. The species was reported from Gurez valley for the first time. Numerous threats like excessive grazing, deforestration, habitat fragmentation, tourism encroachment, landslides and excessive exploitation have decreased its natural populations in most of the surveyed habitats. Consequently, its existence may become threatened in near future if timely conservation steps are not taken immediately by concerned stakeholders involved in medicinal plant research. Moreover, use of plant tissue culture techniques is recommended for development of its in vitro propagation protocols. Therefore, introduction of this medicinal plant in botanical gardens, protected sites and development of monitoring programmes are needed for its immediate conservation in Northwestern Himalayas, India.

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