ABSTRACT: Non-targeted LC-MS/MS analysis of extracts from several plants. Acquisition in positive or negative ion mode. samples of plants by Republic of Korea.
Project description:Non-targeted LC-MS/MS analysis of extracts from several plants. Acquisition in positive or negative ion mode. samples of plants by Republic of Korea.
Project description:Members of the Caryophyllaceae Juss. family possess anabolic, adaptogenic, radioprotective, antitumoral and hemorheological properties and have been used in medical practice for the treatment of various inflammatory disorders. Macrophages are key immune cells that coordinate the inflammatory reaction. To identify the effects of Silene sendtneri and Silene roemeri on macrophage activation, primary human macrophages were cultured with extracts of these plants .We used microarrays to determine the global expression pattern induced by the extracts in macrophages.
Project description:Analyses of Heteropterys umbellata (Malpighiaceae) stems and leaves extracts. Plants were collected in two different Brazilian States (Sao Paulo and Minas Gerais). Dried plant material was extracted with EtOH80%. Positive ionization mode analyses. LC-MS/MS performed in a Shimadzu HPLC using a Phenomenex C18-Luna (250 mm x 4.6 mm, 5.0 um) column and an Amazon SL (Bruker Daltonics) mass spectrometer (ion trap) equipped with an ESI source. Auto MSn mode for exploratory analysis.
Project description:microRNA-150 (miR-150) is mainly expressed in the lymph nodes and spleen and is highly up-regulated during the development of mature T and B cells. To understand the signal-transduction network for 'effector or memory T cells' and 'mir-150' in naïve, effector, or memory CD8 T cells of mir-150 knockout and wild-type mice, we analyzed gene expression profiles by microarray. The genetic background of the cells used in this study is CD8 T cells from spleen of the 8 week-old male C57BL/6J mice (for female: WT-memory_2 & KO-memory_2). Corresponding authors: Inpyo Choi, PhD, Immunotherapy Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro,Yuseong, Daejeon 305-806, Republic of Korea. E-mail: ipchoi@kribb.re.kr. Or: Tae-Don Kim, PhD, Immunotherapy Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong, Daejeon 305-806, Republic of Korea. E-mail: tdkim@kribb.re.kr.
Project description:microRNA-150 (miR-150) is mainly expressed in the lymph nodes and spleen and is highly up-regulated during the development of mature T and B cells. To understand the signal-transduction network for 'effector or memory T cells' and 'mir-150' in naM-CM-/ve, effector, or memory CD8 T cells of mir-150 knockout and wild-type mice, we analyzed gene expression profiles by microarray. The genetic background of the cells used in this study is CD8 T cells from spleen of the 8 week-old male C57BL/6J mice (for female: WT-memory_2 & KO-memory_2). Corresponding authors: Inpyo Choi, PhD, Immunotherapy Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro,Yuseong, Daejeon 305-806, Republic of Korea. E-mail: ipchoi@kribb.re.kr. Or: Tae-Don Kim, PhD, Immunotherapy Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong, Daejeon 305-806, Republic of Korea. E-mail: tdkim@kribb.re.kr. wild-type[WT] vs. mir-150 knockout[KO]; naM-CM-/ve, effector, and memory CD8 T cells.
Project description:In the present study, we identified SIRT6 (S56Y)- and SIRT7 (H187Y)-interacting proteins, and compared their interactomes to investigate functional links.<br>Extra primary submitter: <a href="mailto:nglee@postech.ac.kr" target="_top">Namgyu Lee</a>, Department of Life Sciences, Pohang University of Science and Technology, Pohang, 790-784, Republic of Korea
Project description:Research Center of Bioconvergence Analysis, Korea Basic Science Institute, 162 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju, Chungbuk, Republic of Korea, 363-883 Phone: +82-43-240-5150, Fax:+82-43-240-5159 E-mail: jongshin@kbsi.re.kr
Project description:Plant alkaloids represent a diverse group of nitrogen-containing natural products. These compounds are considered valuable in drug discovery and development. High-throughput identification of such plant secondary metabolites in complex plant extracts is essential for drug discovery, lead optimization, and understanding the biological pathway. The present study aims to rapidly identify different classes of alkaloids in plant extracts through the liquid chromatography with electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) approach using 161 isolated and purified alkaloids. These are biologically important unique alkaloids belonging to different sub-classes such as isoquinoline, quinoline, indole, tropane, pyridine, piperidine, quinolizidine, aporphine, steroidal, and terpenoid. The majority of these are not available commercially and are known to manifest valuable biological activities. Four pools of a maximum of 50 phytostandards each were prepared, based on their log <i>P</i> value to minimize co-elution for rapid and cost-effective analyses. MS/MS spectra were acquired in the positive ionization mode by using their [M + H]<sup>+</sup> and/or [M + Na]<sup>+</sup> with both the average collisional energy (25.5-62 eV) and individual collisional energies (10, 20, 30, and 40 eV). Accurate mass, high-resolution mass spectrometry (HR-MS) data, MS/MS data, and retention times were curated for each compound. The developed LC-MS/MS method was successfully used to interrogate and fast dereplicate alkaloids in 13 medicinal plant extracts and a herbal formulation. A total of 56 alkaloids were identified based on the reference standard retention times (RTs), HR-MS spectra, and/or MS/MS spectra. The MS data have been submitted to the MetaboLights online database (MTBLS2914). The mass spectrometric and chromatographic data will be useful for the discovery of new congeners and the study of biological pathways of alkaloids in the plant kingdom.
2023-12-12 | MTBLS2914 | MetaboLights
Project description:Floral microbial community structure of 12 wild plants in Gurye, Korea Republic