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https://www.readbyqxmd.com/read/29116937/synthesis-and-biological-evaluation-of-acyl-derivatives-of-hydroxyflavones-as-potent-antiproliferative-agents-against-drug-resistance-cell-lines
#1
Monika Stompor, Marta Świtalska, Joanna Wietrzyk
The synthesis of hydroxyflavone derivatives is described. The acyl derivatives of 3-, 6-, 7-hydroxyflavones (compounds 2, 4, 6, respectively) and chrysin (5,7-dihydroxyflavone, 7) were obtained in high yields and evaluated in vitro for their cytotoxic activity against several cancer cell lines of different origin: MCF-7 (breast cancer), A549 (nonsmall cell lung cancer), MES-SA (uterine sarcoma), LoVo (colon cancer), drug-resistant human cancer cells (MES-SA/DX5, LoVo/DX) and also towards non-cancer cell line MCF-10A (normal breast epithelial cells)...
November 8, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28906489/disrupting-cct-%C3%AE-%C3%A2-%C3%A2-%C3%AE-tubulin-selectively-kills-cct-%C3%AE-overexpressed-cancer-cells-through-mapks-activation
#2
Yan-Jin Liu, Vathan Kumar, Yuan-Feng Lin, Po-Huang Liang
We have previously demonstrated the ability of I-Trp to disrupt the protein-protein interaction of β-tubulin with chaperonin-containing TCP-1β (CCT-β). This caused more severe apoptosis in multidrug-resistant MES-SA/Dx5, compared to MES-SA, due to its higher CCT-β overexpression. In this study, we screened a panel of cancer cell lines, finding CCT-β overexpression in the triple-negative breast cancer cell line MDA-MB-231, colorectal cancer cell lines Colo205 and HCT116, and a gastric cancer cell line MKN-45...
September 14, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28829898/internal-amplification-control-of-pcr-for-the-glu1-dx5-allele-in-wheat
#3
H N Heim, E S N Vieira, L R T Polo, N K Lima, G J Silva, G A Linde, N B Colauto, I Schuster
One of the limiting factors in using dominant markers is the unique amplification of the target fragment. Therefore, failures in polymerase chain reaction (PCR) or non-amplifications can be interpreted as an absence of the allele. The possibility of false negatives implies in reduced efficiency in the selection process in genetic breeding programs besides the loss of valuable genetic material. Thus, this study aimed to evaluate the viability of a microsatellite marker as an internal amplification control with a dominant marker for the wheat Glu1-Dx5 gene...
August 17, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28718636/long-chain-alkyl-esters-of-hydroxycinnamic-acids-as-promising-anticancer-agents-selective-induction-of-apoptosis-in-cancer-cells
#4
José C J M D S Menezes, Najmeh Edraki, Shrivallabh P Kamat, Mahsima Khoshneviszadeh, Zahra Kayani, Hossein Hadavand Mirzaei, Ramin Miri, Nasrollah Erfani, Maryam Nejati, José A S Cavaleiro, Tiago Silva, Luciano Saso, Fernanda Borges, Omidreza Firuzi
Cancer is the major cause of morbidity and mortality worldwide. Hydroxycinnamic acids (HCAs) are naturally occurring compounds and their alkyl esters may possess enhanced biological activities. We evaluated C4, C14, C16, and C18 alkyl esters of p-coumaric, ferulic, sinapic, and caffeic acids (19 compounds) for their cytotoxic activity against four human cancer cells and also examined their effect on cell cycle alteration and apoptosis induction. The tetradecyl (1c) and hexadecyl (1d) esters of p-coumaric acid and tetradecyl ester of caffeic acid (4c), but not the parental HCAs, were selectively effective against MOLT-4 (human lymphoblastic leukemia) cells with IC50 values of 0...
August 23, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28713655/differential-effect-of-platelet-endothelial-cell-adhesion-molecule-1-pecam-1-on-leukocyte-infiltration-during-contact-hypersensitivity-responses
#5
Merideth Early, William G Schroeder, Ranajana Unnithan, John M Gilchrist, William A Muller, Alan Schenkel
BACKGROUND: 2'-4' Dinitrofluorobenzene (DNFB) induced contact hypersensitivity is an established model of contact sensitivity and leukocyte migration. Platelet Endothelial Cell Adhesion Molecule-1 (PECAM-1) deficient mice were used to examine the role of PECAM-1 in the migration capacity of several different leukocyte populations after primary and secondary application. RESULTS: γδ T lymphocytes, granulocytes, and Natural Killer cells were most affected by PECAM-1 deficiency at the primary site of application...
2017: PeerJ
https://www.readbyqxmd.com/read/28587364/cytotoxic-effects-of-15-deoxy-%C3%AE-12-14-prostaglandin-j2-alone-and-in-combination-with-dasatinib-against-uterine-sarcoma-in-vitro
#6
Takako Kawakita, Nisimura Masato, Eri Takiguchi, Akiko Abe, Minoru Irahara
Effective chemotherapeutic strategies for uterine sarcoma are lacking; existing therapies achieve poor response rates. Previous studies have identified the prostaglandin 15-deoxy-Δ12,14-prostaglandin J2 (15d-PGJ2) as a potential anticancer treatment; however, its effectiveness in uterine sarcoma has not been examined. Furthermore, the molecular mechanisms underlying the cytotoxic mechanism of 15d-PGJ2 remain unclear. Here, we evaluated the effects of 15d-PGJ2 alone and in combination with the tyrosine kinas inhibitor (TKI) dasatinib in uterine sarcoma cell lines (MES-SA, MES-SA/DX5 and SKN)...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28565780/comparison-of-the-purity-and-vitality-of-natural-killer-cells-with-different-isolation-kits
#7
Guangchuan Wang, Guang Yu, Dongmei Wang, Shengnan Guo, Fengping Shan
Natural killer (NK) cells are innate lymphocytes that aid in the protection of the host from infectious diseases and cancer. In vitro studies of NK cells have provided a foundation for developing clinical adoptive NK-cell transferred immunotherapy against human tumors. To elucidate the functions and mechanisms of NK cell populations, it is important to develop an optimal, highly reproducible and reliable isolation method. The present comparative study was performed with four different NK cell isolation kits of magnetic bead labeling made by Miltenyi and Stemcell companies, including positive selection kits [cluster of differentiation (CD)-49b, using the monoclonal antibody DX5) MicroBeads] and negative selection kits...
May 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28531172/experimental-evaluation-of-cryopreservative-solutions-to-maintain-in-vitro-and-in-vivo-infectivity-of-p-berghei-sporozoites
#8
Naresh Singh, Samantha J Barnes, Sandra Kennedy, John H Adams
The rodent malaria parasite Plasmodium berghei is an excellent model organism for laboratory-based experimental evaluation of anti-malarial therapeutics prior to studies with human malaria parasites. The rodent model is especially important for evaluation of pre-erythrocytic (PE) stage therapies, especially as current efforts to develop new PE vaccines and drugs is limited by access to P. falciparum and P. vivax sporozoites. Developing a more effective method for cryopreservation of sporozoites would help improve access to sporozoites for laboratories lacking suitable insectary facilities...
2017: PloS One
https://www.readbyqxmd.com/read/28485520/murine-thymic-nk-cells-a-case-of-identity
#9
COMMENT
Victoria Male, Hugh J M Brady
Just over a decade ago, it was established that NK cells in the thymus do not follow precisely the same developmental pathway as conventional NK cells that develop in the bone marrow. Subsequently, it has emerged that NK cells are one branch of a family of innate lymphoid cells (ILCs). ILC1s and thymic NK cells have, however, sufficient similarities such that questions have been raised about how distinctive each cell type is from the other. In this issue of European Journal of Immunology, Gabrielli et al. [Eur...
May 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28287667/comparative-solution-equilibrium-studies-of-antitumor-ruthenium-%C3%AE-6-p-cymene-and-rhodium-%C3%AE-5-c5me5-complexes-of-8-hydroxyquinolines
#10
Orsolya Dömötör, Veronika F S Pape, Nóra V May, Gergely Szakács, Éva A Enyedy
Complex formation processes of [Ru(η(6)-p-cymene)(H2O)3](+) and [Rh(η(5)-C5Me5)(H2O)3](+) organometallic cations with 8-hydroxyquinoline (HQ) ligands were studied in aqueous solution by the combined use of (1)H NMR spectroscopy, UV-visible spectrophotometry and pH-potentiometry. Solution stability, chloride ion affinity and lipophilicity of the complexes were characterized together with the in vitro cytotoxicity against a pair of cancer cell lines, responsive and resistant to classic chemotherapy. The solid phase structure of the [Rh(η(5)-C5Me5)(8-quinolinolato)(Cl)] complex was characterized by single-crystal X-ray diffraction analysis...
March 27, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28243063/novel-5-oxo-hexahydroquinoline-derivatives-design-synthesis-in-vitro-p-glycoprotein-mediated-multidrug-resistance-reversal-profile-and-molecular-dynamics-simulation-study
#11
Omolbanin Shahraki, Najmeh Edraki, Mehdi Khoshneviszadeh, Farshid Zargari, Sara Ranjbar, Luciano Saso, Omidreza Firuzi, Ramin Miri
Overexpression of the efflux pump P-glycoprotein (P-gp) is one of the important mechanisms of multidrug resistance (MDR) in many tumor cells. In this study, 26 novel 5-oxo-hexahydroquinoline derivatives containing different nitrophenyl moieties at C4 and various carboxamide substituents at C3 were designed, synthesized and evaluated for their ability to inhibit P-gp by measuring the amount of rhodamine 123 (Rh123) accumulation in uterine sarcoma cells that overexpress P-gp (MES-SA/Dx5) using flow cytometry...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28031334/respiratory-influenza-virus-infection-induces-memory-like-liver-nk-cells-in-mice
#12
Tingting Li, Jian Wang, Yanshi Wang, Yongyan Chen, Haiming Wei, Rui Sun, Zhigang Tian
Although NK cells are classified as innate immune cells, recent studies have demonstrated the transformation of NK cells into long-lived memory cells that contribute to secondary immune responses in certain mouse models. However, whether NK cells mount an Ag-specific memory response to acute influenza virus infection has not yet been examined. Here, we show that, consistent with previous studies, lung NK cells play an important role in controlling viral proliferation after primary influenza virus infection...
February 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27670593/the-aryl-hydrocarbon-receptor-is-required-for-the-maintenance-of-liver-resident-natural-killer-cells
#13
Luhua H Zhang, June Ho Shin, Mikel D Haggadone, John B Sunwoo
A tissue-resident population of natural killer cells (NK cells) in the liver has recently been described to have the unique capacity to confer immunological memory in the form of hapten-specific contact hypersensitivity independent of T and B cells. Factors regulating the development and maintenance of these liver-resident NK cells are poorly understood. The aryl hydrocarbon receptor (AhR) is a transcription factor modulated by exogenous and endogenous ligands that is important in the homeostasis of immune cells at barrier sites, such as the skin and gut...
October 17, 2016: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27476287/synthesis-and-cytotoxic-activity-of-new-5h-indolo-2-3-b-quinoline-o-aminoglycosides
#14
Katarzyna Badowska-Rosłonek, Agnieszka Ciesielska, Marta Switalska, Małgorzata Piskozub, Wanda Peczyńska-Czoch, Joanna Wietrzyk, Łukasz Kaczmarek
Novel 5H-indolo[2,3-b]quinoline O-aminoglycosides were synthesized in order to check the hypothesis that the construction of hybrids composed of the active 5H-indolo[2,3-b]quinoline chromophore and daunosaminyl or acosaminyl moiety may result in the cytotoxic activity of the obtained derivatives that is much higher than the one of the parent DIMIQ (5,11-dimethyl-5H-indolo[2,3-b]quinoline) and 6H-indoloquinoline analogs. Actually, 5H-indolo[2,3-b]indoloquinoline O-aminoglycosides showed the anti-proliferative activity in vitro against human lung adenocarcinoma A549, breast cancer MCF-7, melanoma Hs294T, promyelocytic leukemia HL-60, uterine sarcoma MES-SA and colon cancer LoVo cell lines, which was 10 times higher than that of the 6H-analogs and comparable to the one of the referential DIMIQ...
May 2016: Acta Poloniae Pharmaceutica
https://www.readbyqxmd.com/read/27469529/expression-of-the-inhibitory-ly49e-receptor-is-not-critically-involved-in-the-immune-response-against-cutaneous-pulmonary-or-liver-tumours
#15
Jessica Filtjens, Jiri Keirsse, Els Van Ammel, Sylvie Taveirne, Aline Van Acker, Tessa Kerre, Tom Taghon, Bart Vandekerckhove, Jean Plum, Jo A Van Ginderachter, Georges Leclercq
Natural killer (NK) lymphocytes are part of the innate immune system and are important in immune protection against tumourigenesis. NK cells display a broad repertoire of activating and inhibitory cell surface receptors that regulate NK cell activity. The Ly49 family of NK receptors is composed of several members that recognize major histocompatibility complex class I (MHC-I) or MHC-I-related molecules. Ly49E is a unique inhibitory member, being triggered by the non-MHC-I-related protein urokinase plasminogen activator (uPA) in contrast to the known MHC-I-triggering of the other inhibitory Ly49 receptors...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27451241/influence-of-high-molecular-weight-glutenin-subunit-composition-at-glu-a1-and-glu-d1-loci-on-secondary-and-micro-structures-of-gluten-in-wheat-triticum-aestivum-l
#16
Xuejun Li, Tianhong Liu, Lijun Song, Heng Zhang, Liqun Li, Xin Gao
As one of critical gluten proteins, high-molecular-weight glutenin subunits (HMW-GS) mainly affect the rheological behaviour of wheat dough. The influence of HMW-GS variations at the Glu-A1 and Glu-D1 loci on both secondary and micro structures of gluten and rheological properties of wheat dough was investigated in this study. Results showed that the Amide I bands of the three near-isogenic lines (NILs) shifted slightly, but the secondary structures differed significantly. The micro structure of gluten in NIL 4 (Ax null) showed bigger apertures and less connection, compared to that in Xinong 1330 (Ax1)...
December 15, 2016: Food Chemistry
https://www.readbyqxmd.com/read/27449564/the-synthetic-ajoene-analog-spa3015-induces-apoptotic-cell-death-through-crosstalk-between-nf-%C3%AE%C2%BAb-and-ppar%C3%AE-in-multidrug-resistant-cancer-cells
#17
Jee Won Hwang, Hyewon Cho, Jae Yeon Lee, Youngsic Jeon, Su-Nam Kim, Sang Jin Lee, Gyu-Un Bae, Sungpil Yoon, Raok Jeon, Yong Kee Kim
Multidrug resistance (MDR) caused by P-glycoprotein (P-gp) overexpression impedes successful cancer chemotherapy. In this study, we investigated the anticancer effects of SPA3015, a synthetic ajoene analog, in P-gp-overexpressing MDR cancer cells (KBV20C and MES-SA/DX5). Treatment with SPA3015 caused a dramatic decrease in the cell viabilities of both KBV20C and MES-SA/DX5 cells. This decrease was accompanied by apoptotic cell death without affecting the expression level or drug efflux function of P-gp. SPA3015 selectively suppressed NF-κB reporter gene activity, which led to decreased expression of NF-κB target genes such as CIAP1, CIAP2, XIAP, and Bcl-XL...
October 2016: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/27441242/n-alkylated-isatins-evade-p-gp-mediated-efflux-and-retain-potency-in-mdr-cancer-cell-lines
#18
Kara L Vine, Lisa Belfiore, Luke Jones, Julie M Locke, Samantha Wade, Elahe Minaei, Marie Ranson
The search for novel anticancer therapeutics with the ability to overcome multi-drug resistance (MDR) mechanisms is of high priority. A class of molecules that show potential in overcoming MDR are the N-alkylated isatins. In particular 5,7-dibromo-N-alkylisatins are potent microtubule destabilizing agents that act to depolymerize microtubules, induce apoptosis and inhibit primary tumor growth in vivo. In this study we evaluated the ability of four dibrominated N-alkylisatin derivatives and the parent compound, 5,7-dibromoisatin, to circumvent MDR...
January 2016: Heliyon
https://www.readbyqxmd.com/read/27183639/nk-cells-help-induce-anti-hepatitis-b-virus-cd8-t-cell-immunity-in-mice
#19
Meijuan Zheng, Rui Sun, Haiming Wei, Zhigang Tian
Although recent clinical studies demonstrate that NK cell function is impaired in hepatitis B virus (HBV)-persistent patients, whether or how NK cells play a role in anti-HBV adaptive immunity remains to be explored. Using a mouse model mimicking acute HBV infection by hydrodynamic injection of an HBV plasmid, we observed that although serum hepatitis B surface Ag and hepatitis B envelope Ag were eliminated within 3 to 4 wk, HBV might persist for >8 wk in CD8(-/-) mice and that adoptive transfer of anti-HBV CD8(+) T cells restored the ability to clear HBV in HBV-carrier Rag1(-/-) mice...
May 15, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/26962716/isolation-and-111-in-oxine-labeling-of-murine-nk-cells-for-assessment-of-cell-trafficking-in-orthotopic-lung-tumor-model
#20
Gaurav Malviya, Tapan Nayak, Christian Gerdes, Rudi A J O Dierckx, Alberto Signore, Erik F J de Vries
A noninvasive in vivo imaging method for NK cell trafficking is essential to gain further understanding of the pathogenesis of NK cell mediated immune response to the novel cancer treatment strategies, and to discover the homing sites and physiological distribution of NK cells. Although human NK cells can be labeled for in vivo imaging, little is known about the murine NK cell labeling and its application in animal models. This study describes the isolation and ex vivo radiolabeling of murine NK cells for the evaluation of cell trafficking in an orthotopic model of human lung cancer in mice...
April 4, 2016: Molecular Pharmaceutics
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