Activity of selected plant extracts against honey bee pathogen Paenibacillus larvae

International audienceAbstractThe present study focuses on the antibacterial activity of selected plant extracts against Paenibacillus larvae, the causal agent of American foulbrood disease of honey bees. A gas chromatography-mass spectrometry method was used to analyze six diethyl ether extracts of two white birch species, black poplar and common aspen buds, as well as n-hexane, diethyl ether, and methanol extracts of young twigs from downy and silver birches. Among the identified extract constituents were flavonoids, phenylpropenoids, triterpenoids, and glucosides. In spite of significant differences in qualitative and quantitative composition, all tested in vitro extracts demonstrated high anti-P. larvae activity at minimal inhibitory concentration levels between < 1.0 and 125 μg/mL. To examine the cause of such disparity, the anti-P. larvae activity of some individual constituents naturally present in plant extract compounds was determined. A higher susceptibility of P. larvae (ERIC I) to relatively poorly polar triterpenoid levels compared to polar compounds, flavonoids, and glucosides was demonstrated

Chemical composition of rhizome oleoresin and anti-inflammatory, antinociceptive and antipyretic activity of oleoresins of Alpinia allughas Roscoe. from tarai region of Uttarakhand

ABSTRACT          The investigation of volatile constituents of the rhizome oleoresin of Alpinia allughas Roscoe. growing in tarai region of Kumaun hills, Uttarakhand, revealed the presence of 55 terpenoids. The major constituents identified in the rhizome oleoresin were α-eudesmol (21.3%), β-selinene (13.9%), valencene (9.6%), borneol (7.1%), α-humulene (5.3%) and 7-epi-α-selinene (5.2%). Other minor constituents identified were (E)-β-caryophyllene (3.8%), (6 E)-nerolidol (3.5%), (E,E)-farnesol (3.2%), caryophyllene oxide (2.5%), humulene oxide (2.7%), bornyl acetate (1.9%), coranarin- E (1.8%), linalool (1.8%) and α-terpineol (1.6%). The total identified constituents contribute 97.0% of the oleoresin. The rhizomes oleoresins exhibited significant antinociceptive activity with 34.79% inhibition at 50 mg/kg body weight and 43.24% at 100 mg/kg body wt. compare to standard drug ibuprofen (40 mg/kg body wt.), it also showed antipyretic activity in dose dependent manner with temperature reduction 77.57±5.88% at 50 mg/kg body wt. and 98.95±3.95% at 100 mg/kg body wt. after 3 hours. Oleoresin also showed 29.23% inhibition in carrageenin-induced paw edema at 50 mg/kg body wt. and 39.92% inhibition at 100mg/kg body wt. in compare to ibuprofen 40.06% at 40 mg/kg body weight.Keywords Alpinia allughas Roscoe.; Zingiberaceae; α-eudesmol; β-selinene; anti-inflammatory; antinociceptive; antipyretic activity; oleoresins  

Chemical Composition, Anti-inflammatory, Analgesic, Antipyretic, Myorelaxant, Antibacterial and Antifungal activity of Rabdosia rugosus Wall. (Syn. Plectranthus rugosus Wall.)

For the present investigation Rabdosia rugosus Wall. Syn. Plectranthus rugosus Wall.&nbsp; was collected from Pancheshwar, Uttarakhand on the way to Badrinath. The GC and GC-MS analysis, revealed the presence of more than forty compounds out of which 35 compounds were identified amounting to 97.3% of the total oil. The essential oil of R. rugosus was rich in sesquiterpinoids (~90%) and was poor in monoterpenoids (8.1%). α-bisabolol (41.9%) was the major constituent of the oil and the other identified major compounds were germacrene-D (9.7%), β-caryophyllene (7.6%), dehydroabietane (5.2%), ar-curcumene (5.0), trans-ferruginol (3.3%) α-cadinol (3.2%), τ-muurolol (2.3%), &nbsp;&nbsp;p-Cymene (3.2%) and&nbsp; γ-terpinene (2.0%). The&nbsp; essential&nbsp; oil&nbsp; of&nbsp; Rabdosia rugosus showed insignificant&nbsp; anti-inflammatory&nbsp; and&nbsp; analgesic&nbsp; activity&nbsp; but&nbsp; shows&nbsp; significant&nbsp; antipyretic,&nbsp; &nbsp;myorelaxant and &nbsp;antimicrobial activity

Prolidase-proline oxidase axis is engaged in apoptosis induction by birch buds flavonol santin in endometrial adenocarcinoma cell line

Cancer of the corpus uteri and cervix uteri, collectively ranks second among new cancer cases in women after breast cancer. Therefore, investigation of new anticancer agents and identifying new molecular targets presents a challenge to improve effectiveness of chemotherapy. In this study, antiproliferative activity of flavonoids derived from the buds of silver birch and downy birch was evaluated in endometrial cancer Ishikawa cells and cervical cancer HeLa cells. It was found that flavanol santin reduced viability of both cell lines better than other flavonoids, including apigenin and luteolin. Moreover, this activity was slightly higher than that induced by the chemotherapy drug, cisplatin. Santin promoted intrinsic and extrinsic apoptosis pathways in cancer cells, but it had low toxicity in normal fibroblasts. The mechanisms of impairing cancer cell viability included induction of oxidative proline catabolism, however in different ways in the cell lines used. In HeLa cells, increase of proline oxidation was due to activation of p53 leading to proline oxidase upregulation. In contrast, in Ishikawa cells, having basal proline oxidase level significantly higher than HeLa cells, santin treatment decreased its expression. Nevertheless, proline oxidation was induced in these cells since santin increased expression and activity of prolidase, an enzyme providing proline from protein degradation. In both cell lines, proline oxidation was associated with generation of reactive oxygen species leading to reduction in cell viability. Our findings reveal the involvement of proline oxidase in induction of apoptosis by santin and identify a role of prolidase in proline oxidase-dependent apoptosis

Natural fluorinated organics in fluorite and rocks

Results of measurements of fluorinated compounds in gasses extracted from igneous and metamorphic rocks are reported. A new extraction method analogous to a pepper mill for geological samples is described. It permits extraction at low temperatures and ensures a rapid transfer of extracted gases from active surfaces to cryogenic pre-concentration loop. Values for CF4, CF3Cl, CF2Cl2, CFCl3, CHF3, SF6 and NF3 in fluorites, granites, basalts and other igneous and metamorphic rocks are reported. It is proposed that trifluoroacetic acid (TFA) that was recently discovered in various environmental archives could also origin from similar geogenic sources

Chemical composition, antimicrobial, and antioxidant activities of the essential oils from stem, leaves, and seeds of Caryopteris foetida (D. don) Thell.

214-224Caryopteris foetida (D. Don) Thell. also known as stinking blue beard is an aromatic shrub of family verbenaceae. The essential oils from the leaf, stem, and seeds of C. foetida were extracted and analyzed in search of a novel compound. Over 73 constituents were identified from the essential oils of leaf, seeds, and stem. The major compound identified in the leaf oil was δ-cadinene (15.4%) followed by β-caryophyllene (7.8%), (E)-β-farnesene (8.3%), γ-cadinene (7.5%), spathulenol (7.2%), and τ-muurolol (5.1%). The stem oil predominantly consisted of methyl 7-methylcyclopenta[c]pyran-4-carboxylate (15.8%) along with a significant amount of δ-cadinene (11.6%) and γ-cadinene (5.6%), whereas seed oil was characterized by the presence of β-caryophyllene (14.3%) along with α-humulene (8.6%) and β-bisabolene (9.4%). The essential oils were screened for their in vitro antioxidant potential in terms of radical scavenging, metal chelating and reducing assay. The leaf oil exhibited strong DPPH radical scavenging (IC50 =5.1±0.2 μg/mL) and reducing activity (IC50 =3.6±0.5 μg/mL). The antibacterial potential was tested against Salmonela typhimurium, Escherichia coli, Staphylococcus Aureus, and Bacillus megaterium. Maximum activity was exhibited by the essential oils from the leaf and seed. The essential oils were also analyzed for their in vitro anti-inflammatory activity by the protein denaturation method. Both the leaf and stem essential oils exhibited good anti-inflammatory activity with IC50 value of 12.8±0.0 μg/mL and 17.3±0.0 μg/mL respectively

Regiospecific analysis of Mono and Diglycerides in Glycerolysis products by GC x GC TOF-MS.

Comprehensive bidimensional gas chromatography coupled with time-of-flight mass spectrometry (GC × GC-TOF-MS) was used for the characterization of regiospecific mono- and diglycerides (MG-DG) content in the glycerolysis products derived from five different lipids included lard (LA), sun flower seed oil (SF), corn oil (CO), butter (BU), and palm oil (PA). The combination of fast and high temperature non-orthogonal column set namely DB17ht (6 m × 0.10 mm × 0.10 μm) as the primary column and SLB-5 ms (60 cm × 0.10 mm × 0.10 μm) as the secondary column was applied in this work. System configuration involved high oven ramp temperature to obtain precise mass spectral identification and highest effluent’s resolution. 3-Monopalmitoyl-sn-glycerol (MG 3-C16) was the highest concentration in LA, BU and PA while monostearoyl-sn-glycerol (MG C18) in CO and 1,3-dilinoleol-rac-glycerol (DG C18:2c) in SF. Principal component analysis accounted 82% of variance using combination of PC1 and PC2. The presence of monostearoyl-sn-glycerol (MG C18), 3-Monopalmitoyl-sn-glycerol (MG 3-C16), 1,3-dilinoleol-rac-glycerol (DG C18:2c), 1,3-dipalmitoyl-glycerol (DG 1,3-C16), and 1,3-dielaidin (DG C18:1t) caused differentiation of the samples tested