LC-MS Characterization and Biological Activities of Cuban Cultivars of Plectranthus neochilus Schltr

Plectranthus neochilus Schltr. (Lamiaceae) is a plant recently introduced in Cuba. Worldwide, it is an ethnomedicinal alternative for its use against microbial infections, but the Cuban population use the extracts to treat sleep disorders. To address this apparent incongruity, four collections (from different seasonal conditions in the year) of Cuban P. neochilus cultivars were analyzed in terms of their pharmacognostic characteristics. Three extracts using fresh and dried leaves were chemically and biologically characterized. UPLC-DAD-MS/MS analysis was performed to determine their chemical composition, while a panel of nine microorganisms was used to evaluate their antimicrobial activity. Finally, cytotoxic effects of different fractions were measured in three cell lines by the resazurin viability assay. In contrast to previously reported micro and macromorphological properties of P. neochilus, the leaves from the Cuban cultivars did not present glandular trichomes, nor did they produce quantifiable levels of essential oils. Moreover, aqueous extracts used by the population revealed no significant antimicrobial activity and were not cytotoxic. The three extracts showed a similar phytochemical composition, i.e., eight flavonoids, seven abietane diterpenes, and rosmarinic acid as the major constituent, most of them reported for the first time in this species. The low yield of essential oil, the absence of glandular trichomes, compounds with a high level of oxidation, and a moderate antimicrobial activity detected were the most distinctive pharmacognostic and biological characteristics of P. neochilus grown in Cuba. These aspects could explain its non-use as an antimicrobial.

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Taxonomic traits in the microstructure of flowers of parasitic Orobanche picridis with particular emphasis on secretory structures

PROTOPLASMA ◽

10.1007/s00709-019-01438-3 ◽

2019 ◽

Vol 257 (1) ◽

pp. 299-317 ◽

Cited By ~ 1

Author(s):

Agata Konarska ◽

Piotr Chmielewski

Keyword(s):

Neutral Lipids ◽

Phenotypic Variability ◽

Glandular Trichomes ◽

Starch Granules ◽

Secretory Structures ◽

Transmission Electron ◽

Root Parasite ◽

Bright Field Microscopy ◽

High Level ◽

First Time

Abstract Orobanche picridis is an obligate root parasite devoid of chlorophyll in aboveground organs, which infects various Picris species. Given the high level of phenotypic variability of the species, the considerable limitation of the number of taxonomically relevant traits (mainly in terms of generative elements), and the low morphological variation between species, Orobanche is regarded as one of the taxonomically most problematic genera. This study aimed to analyse the taxonomic traits of O. picridis flowers with the use of stereoscopic and bright-field microscopy as well as fluorescence, scanning, and transmission electron microscopy. The micromorphology of sepals, petals, stamens, and pistils was described. For the first time, the anatomy of parasitic Orobanche nectaries and the ultrastructure of nectaries and glandular trichomes were presented. Special attention was paid to the distribution and types of glandular and non-glandular trichomes as well as the types of metabolites contained in these structures. It was demonstrated that the nectary gland was located at the base of the gynoecium and nectar was secreted through modified nectarostomata. The secretory parenchyma cells contained nuclei, large amyloplasts with starch granules, mitochondria, and high content of endoplasmic reticulum profiles. Nectar was transported via symplastic and apoplastic routes. The results of histochemical assays and fluorescence tests revealed the presence of four groups of metabolites, i.e. polyphenols (tannins, flavonoids), lipids (acidic and neutral lipids, essential oil, sesquiterpenes, steroids), polysaccharides (acidic and neutral polysaccharides), and alkaloids, in the trichomes located on perianth elements and stamens.

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POTENSI ANTIMIKROBA CENGKEH : REVIEW LITERATUR

Jurnal Farmasi Medica/Pharmacy Medical Journal (PMJ) ◽

10.35799/pmj.3.2.2020.32882 ◽

2020 ◽

Vol 3 (2) ◽

pp. 53

Author(s):

Marko Jeremia Kalalo ◽

Berta Gratia ◽

Crunny Bidhya Bidulang ◽

Fadillah Djafar ◽

Hosea Jaya Edy

Keyword(s):

Antimicrobial Activity ◽

Scientific Literature ◽

Biological Activities ◽

Secondary Data ◽

Chemical Compounds ◽

Acetone Extract ◽

Google Scholar ◽

Gram Negative Bacteria ◽

Microbial Infections ◽

Clove Essential Oil

ABSTRACT Popularity of bioactive compounds from plants as a treatment for microbial infections have increased. The content of chemical compounds in cloves can produce various biological activities. The chemical compounds contained in cloves are phenol, flavonoid, hydroxybenzoate, and hydrokinetic acid, with the main chemical compound being eugenol. This review was prepared using secondary data from the scientific literature databases of Google Scholar, PubMed, and CORE. This review aims to collect, compile, study, and highlight the potential of cloves as an antimicrobial agent from existing literature and databases. The effectiveness of cloves in treating microorganisms has a broad spectrum, including bacteria, fungi, protozoa, and viruses. The antimicrobial activity of ethanol, methanol, acetone extract, and clove essential oil provided antimicrobial activity against Gram-positive and Gram-negative bacteria. Cloves show bacteriostatic and bacteriocidic activity with mechanism of action in disrupting or damaging cell wall. Keywords : antimicrobial, clove. ABSTRAKPopularitas senyawa bioaktif tanaman sebagai penanganan infeksi mikroba kian meningkat. Kandungan senyawa kimia cengkeh dapat menghasilkan berbagai aktivitas biologi. Senyawa kimia yang terkandung dalam cengkeh adalah fenol, flavonoid, hidroksi benzoat, dan asam hidrokinetik, dengan kandungan senyawa kimia utama eugenol. Review ini dibuat menggunakan data sekunder dari database literatur ilmiah Google Scholar, PubMed, dan CORE. Review ini bertujuan untuk mengumpulkan, menyusun, mengkaji, dan menyorot potensi cengkeh sebagai agen antimikroba dari literatur dan database yang ada. Efektivitas cengkeh dalam menghabat mikroorganisme memiliki spektrum yang luas mencakup bakteri, jamur, protozoa, dan virus. Aktivitas antimikroba ekstrak etanol, metanol, aseton, minyak atsiri cengkeh memberikan aktivitas antimikroba pada bakteri Gram positif dan Gram negatif. Cengkeh menunjukkan aktivitas bakteriostatik dan bakteriosidik dengan mekanisme merusak dinding sel. Kata kunci : antimikroba, cengkeh

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Designing and optimization of an electrochemical substitute for the MTT (3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) cell viability assay

Scientific Reports ◽

10.1038/s41598-019-51241-6 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 1

Author(s):

Mohammad Mazloum-Ardakani ◽

Behnaz Barazesh ◽

Seyed Mohammad Moshtaghioun ◽

Mohammad Hasan Sheikhha

Keyword(s):

Cell Viability ◽

Cost Effective ◽

The Novel ◽

Electrochemical Assay ◽

Cell Viability Assay ◽

Cytotoxic Effects ◽

Viability Assay ◽

Toxic Materials ◽

Diphenyltetrazolium Bromide ◽

First Time

Abstract For the first time ever, this paper reports the development of an easily operated and cost-effective electrochemical assay to be used as an appropriate substitute for the MTT (3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) cell viability assay. The proposed assay is based on the electrochemical reaction of Saccharomyces cerevisiae (S. cerevisiae) with toxic materials, and it overcomes most of the limitations of MTT such as evaporation of volatile solvents, cytotoxic effects of MTT reagents, high cost, and sensitivity to light. The novel electrochemical assay can be used to detect diazinon in the range of 10−6 g mL−1 to 10−2 g mL−1 with the detection limit of 1.5 × 10−7 g mL−1.

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A Confrontation between Two Doctrines: The Birth of Struggle for Hegemony in Hebrew Children's Literature during the 1930s and 1940s

International Research in Children s Literature ◽

10.3366/ircl.2008.0003 ◽

2008 ◽

Vol 1 (2) ◽

pp. 139-155 ◽

Cited By ~ 2

Author(s):

YAEL DARR

Keyword(s):

Children's Literature ◽

Educational System ◽

Single Channel ◽

Children’S Literature ◽

The Political ◽

Literary Creation ◽

History Of ◽

High Level ◽

First Time ◽

Literary Quality

This article describes a crucial and fundamental stage in the transformation of Hebrew children's literature, during the late 1930s and 1940s, from a single channel of expression to a multi-layered polyphony of models and voices. It claims that for the first time in the history of Hebrew children's literature there took place a doctrinal confrontation between two groups of taste-makers. The article outlines the pedagogical and ideological designs of traditionalist Zionist educators, and suggests how these were challenged by a group of prominent writers of adult poetry, members of the Modernist movement. These writers, it is argued, advocated autonomous literary creation, and insisted on a high level of literary quality. Their intervention not only dramatically changed the repertoire of Hebrew children's literature, but also the rules of literary discourse. The article suggests that, through the Modernists’ polemical efforts, Hebrew children's literature was able to free itself from its position as an apparatus controlled by the political-educational system and to become a dynamic and multi-layered field.

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

Current Botany ◽

10.25081/cb.2018.v9.20180106 ◽

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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Antitumoral and Anticholinesterasic Activities of the Seven Species from Rubiaceae

Current Pharmaceutical Biotechnology ◽

10.2174/1389201020666190211154550 ◽

2019 ◽

Vol 20 (4) ◽

pp. 302-308 ◽

Cited By ~ 1

Author(s):

Carla R.F. Volobuff ◽

Pedro C.O. Junior ◽

Sidney M. dos Santos ◽

Zefa V. Pereira ◽

Diego C. Ferreira ◽

...

Keyword(s):

Wistar Rats ◽

Biological Activities ◽

Brain Structures ◽

Acetylcholinesterase Inhibition ◽

Mato Grosso ◽

Male Wistar Rats ◽

First Time ◽

Mato Grosso Do Sul ◽

Antiproliferative Activities ◽

Mcf 7

Background: The genus Psychotria and Palicourea are reported as a source of alkaloids and iridoids, which exhibit biological activities. This study aimed to evaluate antiproliferative and anticholinesterase activities and quantification of the alkaloids of seven species among the genus found in Mato Grosso do Sul region in Brazil. Methods: Concentrations of alkaloids were measured spectrophotometrically. The extracts were submitted to antiproliferative activity against ten cell lines. The anticholinesterase activity of the extracts was developed using brain structures of male Wistar rats: cerebral cortex, hippocampus, hypothalamus and striatum by the Ellman method. Results: Alkaloids from Psychotria and Palicourea species were quantified which showed values of 47.6 to 21.9 µg/g. Regarding the antiproliferative potential, Palicourea crocea demonstrated selectivity against the 786-0 cell line (GI50: 22.87 µg/mL). Psychotria leiocarpa inhibited cell growth against OVCAR-3 (GI50: 3.28 µg/mL), K-562 (GI50: 5.26 µg/mL), HaCaT (GI50: 27.20 µg/mL), PC-3 (GI50: 34.92 µg/mL), MCF-7 (GI50: 35.80 µg/mL) and P. capillacea showed activity against OVCAR-3 (GI50: 2.33 µg/ml) and U251 (GI50: 16.66 µg/ml). The effect of acetylcholinesterase inhibition was more effective in the hippocampus, demonstrating inhibition for Paliourea crocea, Psychotria deflexa, P. brachybotrya and P. leiocarpa of 70%, 57%, 50% and 40%, respectively, followed by P. poeppigiana and P. capillacea, inhibiting 21%, compared to the control. Conclusion: Herein, the present work showed for the first time, anticholinesterasic and antiproliferative activities of extracts of Palicourea and Psychotria seem to be mainly associated with the levels of alkaloids in the leaves of these species.

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Chemical Composition and in-vitro antimicrobial screening of leaf essential oil of Plectranthus gerardianus Benth., and isolation of the major constituent of oil

The Natural Products Journal ◽

10.2174/2210315510999200731183701 ◽

2020 ◽

Vol 10 ◽

Author(s):

Navadha Bhatt ◽

Navabha Joshi ◽

Kapil Ghai ◽

Om Prakash

Keyword(s):

Antimicrobial Activity ◽

Essential Oil ◽

Major Constituent ◽

In Vitro Antimicrobial Activity ◽

Gram Positive Bacteria ◽

Medicinal Value ◽

Leaf Essential Oil ◽

Plant Families ◽

Total Oil

Background: The Lamiaceae (Labiatae) is one of the most diverse and widespread plant families’ in terms of ethno medicine and its medicinal value is based on the volatile oils concentration. This family is important for flavour, fragrance and medicinal properties. Manyplants belonging to this family have indigenous value. Method: The essential oil of Plectranthus gerardianusBenth. (Lamiaceae), was analysed by GC and GC-MS analysis, while the major component was isolated and conformed by NMR spectroscopy. Result: The oil was found to be rich in oxygenated monoterpenes, which contribute around 62% of the total oil. The major components identified were fenchone (22.90%) and carvenone oxide (16.75%), besides other mono and sesquiterpenoids. The in-vitro antimicrobial activity of essential oil was tested against three gram negative bacteria viz. Pasteurellamultocida, Escherichia coli, and Salmonella enterica, two gram positive bacteria viz. Staphylococcus aureus and Bacillus subtilis and two fungi viz. Candida albicans and Aspergillusflavus. The antimicrobial activity of the oil was also compared to the antimicrobial activity of leaf essential oil of another Himalayan plant viz. Nepetacoerulescens. Conclusion: The oil showed in-vitro antimicrobial activity against all the microbial strains and can lessen the ever-growing demand of potentially hazardous antibiotics for treatment.

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Plant Extract Valorization of Melissa officinalis L. for Agroindustrial Purposes through Their Biochemical Properties and Biological Activities

Journal of Chemistry ◽

10.1155/2020/9728093 ◽

2020 ◽

Vol 2020 ◽

pp. 1-12

Author(s):

Mouna Souihi ◽

Rayda Ben Ayed ◽

Imen Trabelsi ◽

Marwa Khammassi ◽

Nadia Ben Brahim ◽

...

Keyword(s):

Fatty Acids ◽

Biological Activities ◽

Biochemical Properties ◽

Major Constituent ◽

Allelopathic Effect ◽

Melissa Officinalis ◽

Lemon Balm ◽

The North ◽

Germacrene D ◽

Leaf Essential Oil

Lemon balm (Melissa officinalis L.) is one of the rare medicinal plants in Tunisia. It was found only in two sites in the north of Tunisia with a small number of plants. The study of germination under the NaCl and PEG effect showed that Tunisian lemon balm seeds were sensitive to saline and osmotic stress. Morphological and biochemical characterizations of Tunisian M. officinalis were performed. Results showed that the Tunisian populations presented plants with long, broad leaves and weak branching. The major constituent in leaf essential oil was germacrene-D with a percentage ranging from 29.17 to 24.6%, and the major fatty acids were polyunsaturated fatty acids, linoleic acid, ranging from 73.93 to 66.74%. The phenolic content of M. officinalis extract varied significantly among origins which could explain the high variation in antiradical scavenging activity. The evaluation of allelopathic activities showed that the extract of the lemon balm leaves presented an allelopathic effect with the majority of the tested seeds.

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Histochemical and Phytochemical Analysis of Lamium album subsp. album L. Corolla: Essential Oil, Triterpenes, and Iridoids

Molecules ◽

10.3390/molecules26144166 ◽

2021 ◽

Vol 26 (14) ◽

pp. 4166

Author(s):

Agata Konarska ◽

Elżbieta Weryszko-Chmielewska ◽

Anna Matysik-Woźniak ◽

Aneta Sulborska ◽

Beata Polak ◽

...

Keyword(s):

Essential Oil ◽

High Performance ◽

Glandular Trichomes ◽

Gas Chromatography Mass Spectrometry ◽

Phytochemical Analysis ◽

Lipophilic Compounds ◽

Histochemical Tests ◽

Microscopy Techniques ◽

Trichome Types ◽

First Time

The aim of this study was to conduct a histochemical analysis to localize lipids, terpenes, essential oil, and iridoids in the trichomes of the L. album subsp. album corolla. Morphometric examinations of individual trichome types were performed. Light and scanning electron microscopy techniques were used to show the micromorphology and localization of lipophilic compounds and iridoids in secretory trichomes with the use of histochemical tests. Additionally, the content of essential oil and its components were determined using gas chromatography-mass spectrometry (GC-MS). Qualitative analyses of triterpenes carried out using high-performance thin-layer chromatography (HPTLC) coupled with densitometric detection, and the iridoid content expressed as aucubin was examined with spectrophotometric techniques. We showed the presence of iridoids and different lipophilic compounds in papillae and glandular and non-glandular trichomes. On average, the flowers of L. album subsp. album yielded 0.04 mL/kg of essential oil, which was dominated by aldehydes, sesquiterpenes, and alkanes. The extract of the L. album subsp. album corolla contained 1.5 × 10−3 ± 4.3 × 10−4 mg/mL of iridoid aucubin and three triterpenes: oleanolic acid, β-amyrin, and β-amyrin acetate. Aucubin and β-amyrin acetate were detected for the first time. We suggest the use of L. album subsp. album flowers as supplements in human nutrition.

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In Vitro Chemopreventive Potential of Phlorotannins-Rich Extract from Brown Algae by Inhibition of Benzo[a]pyrene-Induced P2X7 Activation and Toxic Effects

Marine Drugs ◽

10.3390/md19010034 ◽

2021 ◽

Vol 19 (1) ◽

pp. 34

Author(s):

Mélody Dutot ◽

Elodie Olivier ◽

Sophie Fouyet ◽

Romain Magny ◽

Karim Hammad ◽

...

Keyword(s):

Brown Algae ◽

P2x7 Receptor ◽

Biological Activities ◽

Receptor Activation ◽

Cytotoxic Effects ◽

Human Lung Cells ◽

Cytochrome P450 Activity ◽

Species Production ◽

E Cadherin

Phlorotannins are polyphenols occurring exclusively in some species of brown algae, known for numerous biological activities, e.g., antioxidant, antiproliferative, antidiabetic, and antiallergic properties. Their effects on the response of human lung cells to benzo[a]pyrene (B[a]P) has not been characterized. Our objective was to in vitro evaluate the effects of a phlorotannin-rich extract obtained from the brown algae Ascophyllum nodosum and Fucus vesiculosus on B[a]P cytotoxic effects. The A549 cell line was incubated with B[a]P for 48 and 72 h in the presence or absence of the brown algae extract. Cytochrome P450 activity, activation of P2X7 receptor, F-actin disorganization, and loss of E-cadherin expression were assessed using microplate cytometry and fluorescence microscopy. Relative to control, incubation with the brown algae extract was associated with lower B[a]P-induced CYP1 activity, lower P2X7 receptor activation, and lower reactive oxygen species production. The brown algae extract inhibited the alterations of F-actin arrangement and the downregulation of E-cadherin expression. We identified a phlorotannins-rich extract that could be deeper investigated as a cancer chemopreventive agent to block B[a]P-mediated carcinogenesis.

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