99 results match your criteria: "National Institute of Medicinal Materials[Affiliation]"

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Phytochemical investigation of a methanolic extract of collected from Vietnam resulted in the isolation of a new megastigmane glucoside, named sedumoside K (), together with 17 previously reported compounds (). Structural elucidation of the new compound was achieved by HRFABMS, NMR spectroscopic analysis, acid hydrolysis and quantum ECD calculations. The absolute configuration of compounds has been revised.

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, a new species of Gesneriaceae from Phu Quoc Island, South-western Vietnam.

PhytoKeys

September 2020

Phu Quoc National Park, 1 Nguyen Chi Thanh, Duong Dong Town, Phu Quoc District, Kien Giang Province, Vietnam Phu Quoc National Park Duong Dong Town Vietnam.

A new species of Gesneriaceae, , is described and illustrated from Phu Quoc National Park, Kien Giang Province, South-western Vietnam. It is most similar to , and in having 3-verticillate petiolate leaves, morphologically similar calyx, corolla, stamens, pistil and fruit, but differs from all in the glandular-pubescent stems, petioles and leaf blades, 1(-2)-flowered cymes, longer corolla and fruit and longer and densely glandular-puberulent ovary. Data on distribution, ecology, phenology and provisional conservation assessment of the new species are given along with an illustration and a colour plate.

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L. Wettst. (BM) is a botanical component of Ayurvedic medicines and of dietary supplements used worldwide for cognitive health and function.

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Targeting CD133 reverses drug-resistance via the AKT/NF-κB/MDR1 pathway in colorectal cancer.

Br J Cancer

April 2020

Interventional Cancer Institute of Chinese Integrative Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, 200062, Shanghai, China.

Background: Recent studies have shown that multidrug resistance may be induced by the high stemness of cancer cells. Following prolonged chemotherapy, MDR protein 1 (MDR1) and CD133 increase in CRC, but the relationship between them is unclear.

Methods: The relationship between MDR and CSC properties in CRC was determined via CCK-8 assay, apoptosis assay, DOX uptake and retention, immunohistochemistry, immunofluorescence and flow cytometry.

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Four new pregnane glycosides, gymlatifosides A - D () and one known pregnane glycoside, verticilloside J () were isolated from the leaves of Wall. ex Wight. Their chemical structures were elucidated on the basis of extensive spectroscopic methods, including 1D, 2D NMR, HR-ESI-MS, and in comparison with the reported data.

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Recent studies have shown that MDR could be induced by the high stemness of cancer cells. In a previous study, we found bufalin could reverse MDR and inhibit cancer cell stemness in colorectal cancer, but the relationship between them was unclear. Here we identified overexpressing CD133 increases levels of Akt/nuclear factor-κB signaling mediators and MDR1, while increasing cell chemoresistance.

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Cytotoxic sesquiterpene glucosides from Fissistigma pallens.

Phytochemistry

April 2020

Yonsei Institute of Pharmaceutical Sciences, College of Pharmacy, Yonsei University, Incheon, 406-840, South Korea. Electronic address:

Six undescribed sesquiterpene glucosides, fissispallins A-F, and one known sesquiterpene glucoside, fissispallin, were discovered in the leaves of Fissistigma pallens (Finet & Gagnep.) Merr. The structures were determined using spectroscopic methods, including 1D, 2D NMR, and MS.

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Vascular calcification (VC) is an independent cardiovascular event and also a complication commonly found in chronic kidney disease (CKD) and diabetic patients. The mechanisms underpinning pathophysiology of VC is yet to be fully understood. Nevertheless, certain processes are generally believed to participate in its onset and progression.

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Given the limitations and side effects of many synthetic drugs, natural products are an important alternative source for drugs and medications for many diseases. Icariin (ICA), one of the main flavonoids from plants of the Epimedium genus, has been shown to ameliorate osteoporosis and improve bone health in preclinical studies. Those studies have used different in vivo models, mostly rodents, but the underlying mechanisms remain unclear.

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Curcumin has been used as a traditional medicine and/or functional food in several cultures because of its health benefits including anticancer properties. However, poor oral bioavailability of curcumin has limited its oral usage as a food supplement and medical food. Here we formulated curcumin pellets using a solid dispersion technique.

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EpCAM Aptamer-Functionalized Cationic Liposome-Based Nanoparticles Loaded with miR-139-5p for Targeted Therapy in Colorectal Cancer.

Mol Pharm

November 2019

State Key Laboratory of Bioreactor Engineering & Shanghai Key Laboratory of New Drug Design, School of Pharmacy , East China University of Science and Technology, Shanghai , People's Republic of China.

Colorectal cancer (CRC) is one of the most common cancers worldwide. MicroRNAs (miRNAs) play a vital role in a variety of biology processes. Our previous work identified miR-139-5p as a tumor suppressor gene overexpressed in CRC that assisted in inhibiting progression of cancer.

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Three new flavonol glycosides from .

Biosci Biotechnol Biochem

December 2019

Yonsei Institute of Pharmaceutical Sciences, College of Pharmacy, Yonsei University, Incheon, Korea.

Three new flavonol glycosides, fissflavosides A-C (1-3), together with six known flavonol glycosides, kaempferol 3--L-rhamnopyranosyl-(1→2)--D-galactopyranoside (4), kaempferol 3--L-rhamnopyranosyl-(1→6)--D-galactopyranoside (5), kaempferol 3--L-rhamnopyranosyl-(1→6)--D-glucopyranoside (6), rhamnetin 3--L-rhamnopyranosyl-(1→2)--D-glucopyranoside (7), rutin (8), and isorhamnetin 3--L-rhamnopyranosyl-(1→2)--D-galactopyranoside (9) were isolated from the methanol extract of the leaves. Their chemical structures were determined by 1D-, 2D-NMR, and MS data as well as in comparison with reported data in the literature. Compounds 1-9 showed weak cytotoxic activity on three human cancer cell lines, HT-29, A-2058, A-549 with IC ranging from 134.

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Autism Spectrum Disorder-Related Syndromes: Modeling with and Rodents.

Int J Mol Sci

August 2019

Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 603-8585, Japan.

Whole exome analyses have identified a number of genes associated with autism spectrum disorder (ASD) and ASD-related syndromes. These genes encode key regulators of synaptogenesis, synaptic plasticity, cytoskeleton dynamics, protein synthesis and degradation, chromatin remodeling, transcription, and lipid homeostasis. Furthermore, in silico studies suggest complex regulatory networks among these genes.

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We previously demonstrated that Bacopa monnier (L.) WETTST. extract (BME) ameliorated cognitive dysfunction in animal models of dementia by enhancing synaptic plasticity-related signaling in the hippocampus and protecting cholinergic neurons in the medial septum.

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miR-139-5p reverses stemness maintenance and metastasis of colon cancer stem-like cells by targeting E2-2.

J Cell Physiol

December 2019

State Key Laboratory of Bioreactor Engineering & Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai, People's Republic of China.

Colon cancer stem cells (CCSCs) stand for a critical subpopulation of colon cancer cells that possess self-renewal and multilineage differentiation potentials and drive tumorigenicity. Due to their impact on treatment tolerance, CCSCs have been a hot research topic in the past few years. We have previously reported that miR-139-5p is a vital tumor repressive noncoding RNA whose level decreases in the clinical colon cancer samples with the increase of tumor malignancy.

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The root of plant has been used in the Oriental medicine as a tonic and for the treatment of certain diseases. Our current research on phytochemical profile of the roots of led to the isolation of a new oligosaccharide ester (, polygaloside), a new glucose ester (, arillatoside), along with five known sucrose esters (-). Their structures were elucidated on the basis of extensive chemical and spectroscopic methods as well as comparison with those reported in the literature.

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Further sesquiterpenoids from the rhizomes of Homalomena occulta and their anti-inflammatory activity.

Bioorg Med Chem Lett

May 2019

CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, People's Republic of China. Electronic address:

The rhizomes of Homalomena occulta are called Qian-nian-jian in Traditional Chinese Medicine (TCM), which is widely consumed in China owing to its health benefits for the treatment of rheumatoid arthritis and for strengthening tendons and bones. A phytochemical investigation on this famous TCM yielded 19 sesquiterpenoids (1-19) with various carbocyclic skeletons including isodaucane (2, 8, and 9), guaiane (3), eudesmane (4 and 10-15), oppositane (5, 16, and 17), and aromadendrane (18 and 19) types. The structures of new compounds, Homalomenins A-E (1-5), were determined by diverse spectroscopic data.

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Enantiomeric Isoflavones with neuroprotective activities from the Fruits of Maclura tricuspidata.

Sci Rep

February 2019

Department of Biosystems and Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, 02841, Republic of Korea.

Seven pairs of enantiomeric isoflavones (1a/1b-7a/7b) were obtained from the ethyl acetate extract of the fruits of Maclura tricuspidata (syn. Cudrania tricuspidata), and successfully separated by chiral high-pressure liquid chromatography (HPLC). The structures and absolute configurations of the enantiomeric isoflavones were established on the basic of comprehensive spectroscopic analyses and quantum chemical calculation methods.

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Hydrogen bonding is a vital feature of a large ensemble of chemical structures. Soluble epoxide hydrolase (sEH) has been targeted for development of the treatment for inflammation-associated diseases. Compounds 1 and 2 were purified from Rubia philippinensis, and their structures were established via physical data analysis.

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Pogostemins A-C, three new cytotoxic meroterpenoids from Pogostemon auricularius.

Fitoterapia

October 2018

Institute of Natural Medicine, University of Toyama, 2630-Sugitani, Toyama 930-0194, Japan. Electronic address:

Pogostemins A-C (1-3), three new meroterpenoids with pyrone-sesquiterpenoid hybrid skeletons, were isolated from the aerial parts of Pogostemon auricularius. Their chemical structures were elucidated by 1D- and 2D-NMR and HRESIMS analyses. Compound 1 showed significant cytotoxicities against the human colon adenocarcinoma SW-480, epidermoid carcinoma KB, gastric cancer AGS, hepatoma cancer Hep-G2, and lung cancer LU-1 cell lines with IC values of 7.

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Ovarian cancer is one of the most common causes of female mortalities from gynecological tumors. An ent‑kaurane diterpenoid compound CRT1 (ent‑18‑acetoxy‑7β‑hydroxy kaur‑15‑oxo‑16‑ene), mainly isolated from the Vietnamese herb Croton tonkinesis has been used in folk medicine in Vietnam for cancer treatment. However, the effect of this compound on human ovarian cancer cells has not yet been reported.

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Two novel Lycopodium alkaloids, huperphlegmines A and B (1 and 2), were isolated from the aerial parts of Huperzia phlegmaria collected in Vietnam, together with the five known compounds lycophlegmariol A (3), phlegmariurine B (4), 5-hydroxymethyl-2-furaldehyde (5), rhemanone C (6), and loliolide (7). The chemical structures of the present compounds were elucidated by means of 1D and 2D NMR and HRESIMS spectroscopy, and by comparisons to the reported data in the literature. Compounds 1 and 2 showed moderate acetylcholinesterase inhibitory activities, with IC values of 25.

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Two new abietane diterpenes, huperphlegmarin A-B (-), were isolated from the aerial parts of (L.) Rothm. (Lycopodiaceae), in addition to five known compounds including lycoxanthol (), 21β-hydroxyserrat-14-en-3β-yl acetate (), 21α-hydroxyserrat-14-en-3β-yl acetate (), 21α-hydroxyserrat-14-en-3β-ol (), and fawcettidine ().

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