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https://www.readbyqxmd.com/read/28774893/mrtf-transcription-and-ezrin-dependent-plasma-membrane-blebbing-are-required-for-entotic-invasion
#1
Laura Soto Hinojosa, Manuel Holst, Christian Baarlink, Robert Grosse
Entosis is a nonapoptotic form of cell death initiated by actomyosin-dependent homotypic cell-in-cell invasion that can be observed in malignant exudates during tumor progression. We previously demonstrated formin-mediated actin dynamics at the rear of the invading cell as well as nonapoptotic plasma membrane (PM) blebbing in this cellular motile process. Although the contractile actin cortex involved in bleb-driven motility is well characterized, a role for transcriptional regulation in this process has not been studied...
August 3, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28764725/distinct-effects-of-egfr-inhibitors-on-epithelial-and-mesenchymal-like-esophageal-squamous-cell-carcinoma-cells
#2
Masahiro Yoshioka, Shinya Ohashi, Tomomi Ida, Yukie Nakai, Osamu Kikuchi, Yusuke Amanuma, Junichi Matsubara, Atsushi Yamada, Shin'ichi Miyamoto, Mitsuteru Natsuizaka, Hiroshi Nakagawa, Tsutomu Chiba, Hiroshi Seno, Manabu Muto
BACKGROUND: Epidermal growth factor receptor (EGFR) plays a pivotal role in the pathophysiology of esophageal squamous cell carcinoma (ESCC). However, the clinical effects of EGFR inhibitors on ESCC are controversial. This study sought to identify the factors determining the therapeutic efficacy of EGFR inhibitors in ESCC cells. METHODS: Immortalized-human esophageal epithelial cells (EPC2-hTERT), transformed-human esophageal epithelial cells (T-Epi and T-Mes), and ESCC cells (TE-1, TE-5, TE-8, TE-11, TE-11R, and HCE4) were treated with the EGFR inhibitors erlotinib or cetuximab...
August 1, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/28760079/preparation-of-cell-aggregates-incorporating-gelatin-hydrogel-microspheres-containing-bone-morphogenic-protein-2-with-different-degradabilities
#3
Shuhei Tajima, Yasuhiko Tabata
The objective of this study is to evaluate the survival and functions of cells in cell aggregates incorporating gelatin hydrogel microspheres (GM) containing bone morphogenic protein-2 (BMP2). Gelatin was dehydrothermally crosslinked in a water-in-oil emulsion state at 140 °C for various time periods to prepare GM with different degradabilities. BMP2 was dropped onto the GM freeze dried, followed by leaving at 25 °C to obtain GM containing BMP2 (GM-BMP2). MC3T3-E1 cells were cultured with GM-BMP2 and GM in round U-bottom wells of 96-multiwell microplates which had been coated with poly (vinyl alcohol) (PVA), to allow to form cell aggregates containing GM-BMP2 and GM, respectively...
July 31, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28747257/cells-with-treg-specific-foxp3-demethylation-but-low-cd25-are-prevalent-in-autoimmunity
#4
Ricardo C Ferreira, Henry Z Simons, Whitney S Thompson, Daniel B Rainbow, Xin Yang, Antony J Cutler, Joao Oliveira, Xaquin Castro Dopico, Deborah J Smyth, Natalia Savinykh, Meghavi Mashar, Tim J Vyse, David B Dunger, Helen Baxendale, Anita Chandra, Chris Wallace, John A Todd, Linda S Wicker, Marcin L Pekalski
Identification of alterations in the cellular composition of the human immune system is key to understanding the autoimmune process. Recently, a subset of FOXP3(+) cells with low CD25 expression was found to be increased in peripheral blood from systemic lupus erythematosus (SLE) patients, although its functional significance remains controversial. Here we find in comparisons with healthy donors that the frequency of FOXP3(+) cells within CD127(low)CD25(low) CD4(+) T cells (here defined as CD25(low)FOXP3(+) T cells) is increased in patients affected by autoimmune disease of varying severity, from combined immunodeficiency with active autoimmunity, SLE to type 1 diabetes...
July 23, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28732351/tropomyosin-isoform-tpm2-1-regulates-collective-and-amoeboid-cell-migration-and-cell-aggregation-in-breast-epithelial-cells
#5
HyeRim Shin, Dayoung Kim, David M Helfman
Metastasis dissemination is the result of various processes including cell migration and cell aggregation. These processes involve alterations in the expression and organization of cytoskeletal and adhesion proteins in tumor cells. Alterations in actin filaments and their binding partners are known to be key players in metastasis. Downregulation of specific tropomyosin (Tpm) isoforms is a common characteristic of transformed cells. In this study, we examined the role of Tpm2.1 in non-transformed MCF10A breast epithelial cells in cell migration and cell aggregation, because this isoform is downregulated in primary and metastatic breast cancer as well as various breast cancer cell lines...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28711946/cell-cycle-perturbation-induced-by-gemcitabine-in-human-tumor-cells-in-cell-culture-xenografts-and-bladder-cancer-patients-implications-for-clinical-trial-designs-combining-gemcitabine-with-a-chk1-inhibitor
#6
Ryan Montano, Nadeem Khan, Huagang Hou, John Seigne, Marc S Ernstoff, Lionel D Lewis, Alan Eastman
Gemcitabine irreversibly inhibits ribonucleotide reductase and induces S phase arrest but whether this occurs in tumors in mice or patients has not been established. Tumor cells in culture were incubated with gemcitabine for 6 h to approximate the administration schedule in a patient. Concentrations that induced persistent S phase arrest thereafter correlated with cell killing. Administration of gemcitabine to mice also demonstrated a persistent S phase arrest in their tumor. The minimum dose that induced almost complete S phase arrest after 24 h (40 mg/kg) was well below the maximum tolerated dose in mice...
June 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28709825/the-ambiguous-role-of-%C3%AE-%C3%AE-t-lymphocytes-in-antitumor-immunity
#7
REVIEW
Guranda Chitadze, Hans-Heinrich Oberg, Daniela Wesch, Dieter Kabelitz
γδ T cells play a role in immune surveillance because they recognize stress-induced surface molecules and metabolic intermediates that are frequently dysregulated in transformed cells. Hence, γδ T cells have attracted much interest as effector cells in cell-based immunotherapy. Recently, however, it has been realized that γδ T cells can also promote tumorigenesis through various mechanisms including regulatory activity and IL-17 production. In this review we outline both the pathways involved in cancer cell recognition and killing by γδ T cells as well as current evidence for their protumorigenic activity in various models...
July 11, 2017: Trends in Immunology
https://www.readbyqxmd.com/read/28677765/expression-and-antimicrobial-character-of-cells-transfected-with-human-%C3%AE-%C3%A2-defensin%C3%A2-3-against-periodontitis%C3%A2-associated-microbiota-in-vitro
#8
Minwen Zhu, Bo Miao, Jianhua Zhu, Haiyan Wang, Zengtong Zhou
Periodontitis is an oral chronic inflammatory disease induced by microorganisms that can destroy tooth‑supporting structures. Human β‑defensin‑3 (HBD‑3) is a type of endogenous antimicrobial peptide that inhibits a broad spectrum of microorganisms. The objectives of the present study were to transfect human periodontal ligament cells (HPDLCs) and human bone marrow stromal cells (HBMSCs) with lentivirus containing the HBD‑3 gene, determine the transfection efficiency, and investigate the antimicrobial activity of the experimental cells against periodontal pathogens...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28633916/novel-variant-of-oct4b4-is-differentially-expressed-in-human-embryonic-stem-and-embryonic-carcinoma-cells
#9
Ensieh M Poursani, Majid Mehravar, Bahram Mohammad Soltani, Seyed Javad Mowla
POU domain proteins are an important family of transcription factors that regulates cell type-specific gene expression. One of the most crucial members of this family that maintains pluripotency and self-renewal of embryonic stem cells is POU5F1/OCT4. The OCT4 gene can generate several variants under different situations/cell types includes OCT4A that is the major factor sustains pluripotency in embryonic stem and embryonic carcinoma cells, and also OCT4B and OCT4B1, which might be transcribed from a different potential promoter located in intron1 and are expressed in various tissues and cell types...
June 17, 2017: Gene
https://www.readbyqxmd.com/read/28631562/cancer-stem-cell-markers-in-patterning-differentiation-and-in-prognosis-of-oral-squamous-cell-carcinoma
#10
Simple Mohanta, Gangotri Siddappa, Sindhu Govindan Valiyaveedan, Ravindra Dodda Thimmasandra Ramanjanappa, Debashish Das, Ramanan Pandian, Samanta Sekhar Khora, Moni Abraham Kuriakose, Amritha Suresh
Differentiation is a major histological parameter determining tumor aggressiveness and prognosis of the patient; cancer stem cells with their slow dividing and undifferentiated nature might be one of the factors determining the same. This study aims to correlate cancer stem cell markers (CD44 and CD147) with tumor differentiation and evaluate their subsequent effect on prognosis. Immunohistochemical analysis in treatment naïve oral cancer patients (n = 53) indicated that the expression of CD147 was associated with poorly differentiated squamous cell carcinoma and moderately differentiated squamous cell carcinoma (p < 0...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28609003/preanalytic-specimen-triage-smears-cell-blocks-cytospin-preparations-transport-media-and-cytobanking
#11
Gilda da Cunha Santos, Mauro A Saieg
With increasing requests for the evaluation of prognostic and predictive molecular biomarkers, great attention must be paid to the preanalytical issues regarding sample quality and DNA/RNA yield from all different types of cytological preparations. The objectives of this review were: 1) to provide an update regarding the importance of specimen triage as well as specimen handling and collection; 2) to discuss the different cell preparations that can be used for molecular testing, their advantages and limitations; and 3) to highlight the strategies for biobanking cytology samples...
June 2017: Cancer
https://www.readbyqxmd.com/read/28608552/a-perspective-on-stem-cell-therapy-for-ear-disorders
#12
Rahul Mittal, Hyunseo D Jung, Jeenu Mittal, Adrien A Eshraghi
The use of stem cells in cell-based therapy is an emerging concept for the treatment of ear disorders. Tympanic membrane perforation (TMP) and inner ear disorders are some of the most commonly presented otologic disorders that can benefit from advances in cell-based therapy. Studies have already demonstrated that stem cell-based therapy can potentially be an effective treatment modality for acute and chronic TMP. Recent studies have also shown promise in application of cell-based approach to treat inner ear dysfunction...
June 13, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28532456/mechanisms-of-tanshinone-ii-a-inhibits-malignant-melanoma-development-through-blocking-autophagy-signal-transduction-in-a375-cell
#13
Xiaojing Li, Zhifeng Li, Xianping Li, Baoguo Liu, Zhijun Liu
BACKGROUND: Malignant melanoma (MM) is one of the high degree of malignancy and early prone to blood and lymph node metastasis. There is not cured for MM. Tan II A has been reported to reduce cancer cell proliferation. But the mechanism by which Tan II A inhibited melanoma growth are not well characterized. We sought to explore the possible mechanism by which Tan II A regulated cell proliferation through autophagy signaling pathway in A375 cells. METHODS: We tested the effects of Tan II A on melanoma A375, MV3, M14, and other human cell lines including Hacat and HUVEC cells in cell culture model...
May 22, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28514207/circadian-gene-clock-affects-drug-resistant-gene-expression-and-cell-proliferation-in-ovarian-cancer-skov3-ddp-cell-lines-through-autophagy
#14
Yang Sun, Long Jin, Yu-Xia Sui, Li-Li Han, Jia-Hua Liu
Abnormal autophagy regulation affects the chemoresistance of ovarian cancer, during which the circadian gene clock may play a major role. In this study, RNA interference plasmid pSUPER-Clock and overexpression plasmid pcDNA3.1-Clock of CLOCK were used to stably transfect the SKOV3/DDP cells by lipofection. Upon screening, the in vitro transfected cell lines with pSUPER-Clock, the autophagy level, and G0/G1 phase cells were significantly reduced, and the expression levels of Clock, LC3, P-gp, and MRP2 were inhibited...
May 2017: Cancer Biotherapy & Radiopharmaceuticals
https://www.readbyqxmd.com/read/28505189/small-and-big-hodgkin-reed-sternberg-cells-of-hodgkin-lymphoma-cell-lines-l-428-and-l-1236-lack-consistent-differences-in-gene-expression-profiles-and-are-capable-to-reconstitute-each-other
#15
Benjamin Rengstl, Sooji Kim, Claudia Döring, Christian Weiser, Julia Bein, Katrin Bankov, Marco Herling, Sebastian Newrzela, Martin-Leo Hansmann, Sylvia Hartmann
The hallmark of classical Hodgkin lymphoma (cHL) is the presence of giant, mostly multinucleated Hodgkin-Reed-Sternberg (HRS) cells. Whereas it has recently been shown that giant HRS cells evolve from small Hodgkin cells by incomplete cytokinesis and re-fusion of tethered sister cells, it remains unsolved why this phenomenon particularly takes place in this lymphoma and what the differences between these cell types of variable sizes are. The aim of the present study was to characterize microdissected small and giant HRS cells by gene expression profiling and to assess differences of clonal growth behavior as well as susceptibility toward cytotoxic intervention between these different cell types to provide more insight into their distinct cellular potential...
2017: PloS One
https://www.readbyqxmd.com/read/28495964/transition-zone-cells-reach-g2-phase-before-initiating-elongation-in-maize-root-apex
#16
M Victoria Alarcón, Julio Salguero
Root elongation requires cell divisions in the meristematic zone and cell elongation in the elongation zone. The boundary between dividing and elongating cells is called the transition zone. In the meristem zone, initial cells are continuously dividing, but on the basal side of the meristem cells exit the meristem through the transition zone and enter in the elongation zone, where they stop division and rapidly elongate. Throughout this journey cells are accompanied by changes in cell cycle progression. Flow cytometry analysis showed that meristematic cells are in cycle, but exit when they enter the elongation zone...
June 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28494349/trabectedin-and-campthotecin-synergistically-eliminate-cancer-stem-cells-in-cell-of-origin-sarcoma-models
#17
Lucia Martinez-Cruzado, Juan Tornin, Aida Rodriguez, Laura Santos, Eva Allonca, Maria Teresa Fernandez-Garcia, Aurora Astudillo, Juana Maria Garcia-Pedrero, Rene Rodriguez
Trabectedin has been approved for second-line treatment of soft tissue sarcomas. However, its efficacy to target sarcoma initiating cells has not been addressed yet. Here, we used pioneer models of myxoid/round cell liposarcoma (MRCLS) and undifferentiated pleomorphic sarcoma (UPS) developed from transformed human mesenchymal stromal/stem cells (MSCs) to evaluate the effect of trabectedin in the cell type responsible for initiating sarcomagenesis and their derived cancer stem cells (CSC) subpopulations. We found that low nanomolar concentrations of trabectedin efficiently inhibited the growth of sarcoma-initiating cells, induced cell cycle arrest, DNA damage and apoptosis...
May 8, 2017: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/28485205/effect-of-epigallocatechin-3-gallate-on-the-increase-in-type-ii-collagen-accumulation-in-cartilage-like-msc-sheets
#18
Keigo Sato, Hisashi Mera, Shigeyuki Wakitani, Mutsumi Takagi
With the aim to increase type II collagen content in the scaffold-free cartilage-like cell sheet using human bone marrow mesenchymal stem cells, we examined the effect of epigallocatechin-3-gallate (EGCG) addition to the chondrogenic medium for the cell sheet culture. The addition of EGCG (10 μM) increased the content of type II collagen 2-fold, while the addition did not markedly change the expression level of the genes encoding type II collagen and Sox 9. The reactive oxygen species level in the cells in cell sheets was thought to be too low to suppress the accumulation of type II collagen...
June 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28484739/usage-of-human-mesenchymal-stem-cells-in-cell-based-therapy-advantages-and-disadvantages
#19
REVIEW
Hee Jung Kim, Jeong-Soo Park
The use of human mesenchymal stem cells (hMSCs) in cell-based therapy has attracted extensive interest in the field of regenerative medicine, and it shows applications to numerous incurable diseases. hMSCs show several superior properties for therapeutic use compared to other types of stem cells. Different cell types are discussed in terms of their advantages and disadvantages, with focus on the characteristics of hMSCs. hMSCs can proliferate readily and produce differentiated cells that can substitute for the targeted affected tissue...
March 2017: Balsaeng'gwa Saengsig
https://www.readbyqxmd.com/read/28450545/decreased-motor-neuron-support-by-sma-astrocytes-due-to-diminished-mcp1-secretion
#20
Jasmin E Martin, TrangKimberly T Nguyen, Christopher Grunseich, Jonathan H Nofziger, Philip R Lee, Douglas Fields, Kenneth H Fischbeck, Emily Foran
Spinal muscular atrophy (SMA) is an autosomal-recessive disorder characterized by severe, often fatal muscle weakness due to loss of motor neurons. SMA patients have deletions and other mutations of the survival of motor neuron 1 (SMN1) gene, resulting in decreased SMN protein. Astrocytes are the primary support cells of the CNS and are responsible for glutamate clearance, metabolic support, response to injury, and regulation of signal transmission. Astrocytes have been implicated in SMA as in in other neurodegenerative disorders...
May 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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