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Colorectal polys

Ai-Dong Chen, Hui Li, Yong-Chun Li, Hai Zeng
Colorectal cancer is the most common gastrointestinal cancer in the USA. Naphthazarin, one of the naturally available 1,4-naphthoquinone derivatives, is a natural bioactive molecule that exhibits an antitumor effect. To the best of our knowledge, this is the first study to investigate the anticancer effect of naphthazarin on cell proliferation and apoptosis in human SW480 colorectal cancer cells. In the present study, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and lactate dehydrogenase assays were performed to assess the effect of napthazarin on cell proliferation and cytotoxicity of SW430 cells, respectively...
December 2016: Oncology Letters
Daniela Rossin, Simone Calfapietra, Barbara Sottero, Giuseppe Poli, Fiorella Biasi
Consistent experimental data suggest the importance of inflammation-associated oxidative stress in colorectal cancer (CRC) pathogenesis. Inflammatory bowel disease with chronic intestinal inflammation is now considered a precancerous condition. Oxidative stress is an essential feature of inflammation. Activation of redox-sensitive pro-inflammatory cell signals and inflammatory mediators concur to establish a pro-tumoral environment. In this frame, lipid oxidation products, namely 4-hydroxynonenal and oxysterols, can be produced in big quantity so as to be able to exert their function as inducers of cell signaling pathways of proliferation and survival...
January 12, 2017: Free Radical Biology & Medicine
Jiani Guo, Changli Zhu, Kangqun Yang, Jin Li, Nan Du, Mingzhu Zong, Jianwei Zhou, Jingdong He
Oxaliplatin (L-OHP) is standard treatment for colorectal cancer. However, resistance to L-OHP often leads to treatment failure or cancer relapse. Understanding of the mechanism underlying L-OHP resistance is important to overcome the resistance and improve colorectal cancer treatment. This study aimed to identify new proteins that mediates L-OHP resistance in colorectal cancer and elucidate their mode of function. HT-29 cells were exposed to gradually increased concentration of L-OHP to select L-OHP resistant HT-29/L-OHP cell line...
January 5, 2017: Oncotarget
Abdelkader E Ashour, Mohammad M Badran, Ashok Kumar, Arun K Rishi, Alaa Eldeen Yassin
In the current study, 5-FU-loaded nanoparticles (NPs) were prepared using polylactic-co-glycolic acid (PLGA), polycaprolactone (PCL), di-block poly lactide-co-caprolactone (PLCL) and tri-block poly L-lactide-co-caprolactone-co-glycolide (PLCLG). The influence of these polymers on the particle sizes, morphology, drug loading, and in vitro drug release was investigated. The anticancer activity was assessed utilizing MTT assay in three human cancer cell lines of different tissue origin; brain (Daoy), liver (HepG2), and colorectal (HT29) using suitable negative and positive controls...
October 2016: IEEE Transactions on Nanobioscience
Marios A Diamantopoulos, Christos K Kontos, Dimitrios Kerimis, Iordanis N Papadopoulos, Andreas Scorilas
BACKGROUND: Colorectal adenocarcinoma is one of the most common malignant tumors of the gastrointestinal tract and the second leading cause of cancer-related deaths among adults in Western countries. miR-16 is heavily involved in cancer progression. In this study, we examined the potential diagnostic and prognostic utility of miR-16 expression in colorectal adenocarcinoma. METHODS: Total RNA was extracted from 182 colorectal adenocarcinoma specimens and 86 non-cancerous colorectal mucosae...
December 8, 2016: Clinical Chemistry and Laboratory Medicine: CCLM
Go Oshima, Melinda E Stack, Sean C Wightman, Darren Bryan, Elizabeth Poli, Lai Xue, Kinga B Skowron, Abhineet Uppal, Sean P Pitroda, Xiaona Huang, Mitchell C Posner, Samuel Hellman, Ralph R Weichselbaum, Nikolai N Khodarev
Patients with a limited number of hepatic metastases and slow rates of progression can be successfully treated with local treatment approaches(1,2). However, little is known about the heterogeneity of liver metastases, and animal models capable of evaluating the development of individual metastatic colonies are needed. Here, we present an advanced model of hepatic metastases that provides the ability to quantitatively visualize the development of individual tumor clones in the liver and estimate their growth kinetics and colonization efficiency...
November 30, 2016: Journal of Visualized Experiments: JoVE
Ji-Ye Kee, Yo-Han Han, Jinbong Park, Dae-Seung Kim, Jeong-Geon Mun, Kwang Seok Ahn, Hyun-Jung Kim, Jae-Young Um, Seung-Heon Hong
BACKGROUND: β-Lapachone is a quinone-containing compound found in red lapacho (Tabebuia impetiginosa, syn. T avellanedae) trees. Lapacho has been used in traditional medicine by several South and Central American indigenous people to treat various types of cancer. The purpose of this study was to investigate the antimetastatic properties of β-lapachone and the underlying mechanisms using colon cancer cells. METHODS: This research used metastatic murine colon cancer cell lines, colon 26 (CT26) and colon 38 (MC38)...
December 5, 2016: Integrative Cancer Therapies
Lei Tao, Libing Wei, Yishi Liu, Yang Ding, Xiuting Liu, Xin Zhang, Xiaoping Wang, Yuyuan Yao, Jinrong Lu, Qing Wang, Rong Hu
We have previously reported that Gen-27, a newly synthesized flavonoid, exhibits anticancer effects against human colorectal cancer cells. In this study, we investigated the anticancer effects in human breast cancer cell lines and its underlying mechanisms. We demonstrated that Gen-27 inhibited the growth and proliferation of human breast cancer cells in concentration and time-dependent manners. It was found that Gen-27 induced mitochondrial-mediated apoptosis, characterized by the dissipation of mitochondrial membrane potential (ΔΨm), cytochrome c (Cyt c) release from mitochondria to cytosol, activation of caspases and induction of poly (ADP-ribose) polymerase (PARP)...
November 3, 2016: Biochemical Pharmacology
Sohei Kobayashi, Tyuji Hoshino, Takaki Hiwasa, Mamoru Satoh, Bahityar Rahmutulla, Sachio Tsuchida, Yuji Komukai, Tomoaki Tanaka, Hisahiro Matsubara, Hideaki Shimada, Fumio Nomura, Kazuyuki Matsushita
Anti-PUF60, poly(U)-binding-splicing factor, autoantibodies are reported to be detected in the sera of dermatomyositis and Sjogren's syndrome that occasionally associated with malignancies. PUF60 is identical with far-upstream element-binding protein-interacting repressor (FIR) that is a transcriptional repressor of c-myc gene. In colorectal cancers, a splicing variant of FIR that lacks exon2 (FIRΔexon2) is overexpressed as a dominant negative form of FIR. In this study, to reveal the presence and the significance of anti-FIRs (FIR/FIRΔexon2) antibodies in cancers were explored in the sera of colorectal and other cancer patients...
October 15, 2016: Oncotarget
Abdullah M Alhadheq, Jilani Purusottapatnam Shaik, Abdullah Alamri, Abdulrahman M Aljebreen, Othman Alharbi, Majid A Almadi, Faten Alhadeq, Nahla A Azzam, Abdelhabib Semlali, Mohammad Alanazi, Mohammad D Bazzi, Narasimha Reddy Parine
Background. DNA repair systems are essential for each cell to repair and maintain the genome integrity. Base excision repair pathway is one of the crucial pathways to maintain genome integrity and PARP-1 plays a key role in BER pathway. The purpose of this study is to evaluate the association between polymorphisms in PARP-1 3'untranslated region (3'UTR) SNP rs8679 and its expression in colorectal cancer. Methods. Genotyping and gene expression were performed using TaqMan assays. The effects of age, gender, and tumor location were evaluated in cases and controls regarding the genotyping results...
2016: Disease Markers
Lisa Rank, Sebastian Veith, Eva C Gwosch, Janine Demgenski, Magdalena Ganz, Marjolijn C Jongmans, Christopher Vogel, Arthur Fischbach, Stefanie Buerger, Jan M F Fischer, Tabea Zubel, Anna Stier, Christina Renner, Michael Schmalz, Sascha Beneke, Marcus Groettrup, Roland P Kuiper, Alexander Bürkle, Elisa Ferrando-May, Aswin Mangerich
Genotoxic stress activates PARP1, resulting in the post-translational modification of proteins with poly(ADP-ribose) (PAR). We genetically deleted PARP1 in one of the most widely used human cell systems, i.e. HeLa cells, via TALEN-mediated gene targeting. After comprehensive characterization of these cells during genotoxic stress, we analyzed structure-function relationships of PARP1 by reconstituting PARP1 KO cells with a series of PARP1 variants. Firstly, we verified that the PARP1\E988K mutant exhibits mono-ADP-ribosylation activity and we demonstrate that the PARP1\L713F mutant is constitutively active in cells...
December 1, 2016: Nucleic Acids Research
Sneha S Kelkar, Eleanor McCabe-Lankford, Richard Albright, Phil Harrington, Nicole H Levi-Polyachenko
BACKGROUND AND OBJECTIVE: Photothermal therapy (PTT) has several applications in the areas of wound healing, pain management, bacterial infection control, and cancer treatment dependent on the temperature that is generated. PTT is often used exclusively with near infrared (NIR) light and most nanoparticles (NP) used for PTT are designed to absorb within one narrow range of wavelengths. We have developed a dual-wavelength photothermal therapy by capitalizing on the dual absorption of nanoparticles in the blue and NIR range...
September 16, 2016: Lasers in Surgery and Medicine
Angela Paterna, Sofia E Gomes, Pedro M Borralho, Silva Mulhovo, Cecília M P Rodrigues, Maria-José U Ferreira
ETHNOPHARMACOLOGICAL RELEVANCE: Tabernaemontana elegans Stapf. (Apocynaceae) is a medicinal plant traditionally used in African countries to treat cancer. AIMS OF THE STUDY: To discover new apoptosis inducing lead compounds from T. elegans and provide scientific validation of the ethnopharmacological use of this plant. MATERIALS AND METHODS: Through fractionation, (3'R)-hydroxytaberanelegantine C (1), a vobasinyl-iboga bisindole alkaloid, was isolated from a cytotoxic alkaloid fraction of the methanol extract of T...
December 24, 2016: Journal of Ethnopharmacology
Pezhman Salehi, Anthony Myint, Young J Kim, Marshall X Ge, Joel Lavinsky, Maria K Ho, Amanda L Crow, Charlene Cruz, Maya Monges-Hernadez, Juemei Wang, Jaana Hartiala, Li I Zhang, Hooman Allayee, Aldons J Lusis, Takahiro Ohyama, Rick A Friedman
This study aimed to investigate the genetic causes of vestibular dysfunction. We used vestibular sensory-evoked potentials (VsEPs) to characterize the vestibular function of 35 inbred mouse strains selected from the Hybrid Mouse Diversity Panel and demonstrated strain-dependent phenotypic variation in vestibular function. Using these phenotypic data, we performed the first genome-wide association study controlling for population structure that has revealed two highly suggestive loci, one of which lies within a haplotype block containing five genes (Stard6, 4930503L19Rik, Poli, Mbd2, Dcc) on Chr...
October 2016: Journal of the Association for Research in Otolaryngology: JARO
Jian Dong, Yuanhang Zhou, Zhiwei Liao, Qi Huang, Shidong Feng, Yue Li
Human GGCT (γ-glutamyl cyclotransferase) has been shown to be upregulated in most tumors, but its role in colorectal cancer (CRC) is poorly understood. Thus, CRC cell lines, including HCT116 and SW1116, were chosen to investigate the role of GGCT by constructing a GGCT silencing cells model using lentivirus-mediated RNA interference. The knockdown efficiency was confirmed by reverse transcription-quantitative PCR and a western blot assay. Then, a set of biological functions of GGCT silencing on CRC cell was assessed by MTT, colony-formation assay, and flow cytometry analysis...
November 2016: Anti-cancer Drugs
Eun-Ji Kim, Jung Il Kang, Nguyen-Huu Tung, Young-Ho Kim, Jin Won Hyun, Young Sang Koh, Weon-Young Chang, Eun Sook Yoo, Hee-Kyoung Kang
(1S,2S,3E,7E,11E)-3,7,11,15-cembratetraen-17,2-olide (LS-1), a marine cembrenolide diterpene, has anticancer activity against colon cancer cells such as HT-29, SNU-C5/5-FU (fluorouracil-resistant SNU-C5) and SNU-C5. However, the action mechanism of LS-1 on SNU-C5 human colon cancer cells has not been fully elucidated. In this study, we investigated whether the anticancer effect of LS-1could result from apoptosis via the modulation of Wnt/β-catenin and the TGF-β pathways. When treated with the LS-1, we could observe the apoptotic characteristics such as apoptotic bodies and the increase of sub-G1 hypodiploid cell population, increase of Bax level, decrease of Bcl-2 expression, cleavage of procaspase-3 and cleavage of poly (ADP-ribose) polymerase in SNU-C5 cells...
November 1, 2016: Biomolecules & Therapeutics
Young Jun Kim, Yoon-Tae Kang, Young-Ho Cho
The grafting of poly(ethylene glycol) (PEG) onto an SU8 microfilter has been demonstrated for efficient capture and release of circulating tumor cells (CTCs). Previous CTC filters showed low cell release efficiency due to hydrophobic surfaces, even though their capture efficiency was considerable. PEG, a hydrophilic polymeric compound mainly used to form nonfouling thin films on silicon surfaces, induces repulsive force so that the nonspecific adsorption of the surface is incomparably reduced in comparison with unmodified filter surfaces...
August 16, 2016: Analytical Chemistry
Abhishek Thakur, Subhash C Mandal, Sugato Banerjee
A predominant number of diseases affecting women are related to female hormones. In most of the cases, these diseases are reported to be associated with menstrual problems. These diseases affect female reproductive organs such as the breast, uterus, and ovaries. Estrogen is the main hormone responsible for the menstrual cycle, so irregular menstruation is primarily due to a disturbance in estrogen levels. Estrogen imbalance leads to various pathological conditions in premenopausal women, such as endometriosis, breast cancer, colorectal cancer, prostate cancer, poly cysts, intrahepatic cholestasis of pregnancy, osteoporosis, cardiovascular diseases, obesity, etc...
June 2016: Journal of Acupuncture and Meridian Studies
Soraya Zorro Manrique, Ana L Dominguez, Noweeda Mirza, Christopher D Spencer, Judy M Bradley, James H Finke, James J Lee, Larry R Pease, Sandra J Gendler, Peter A Cohen
Many cancers both evoke and subvert endogenous anti-tumor immunity. However, immunosuppression can be therapeutically reversed in subsets of cancer patients by treatments such as checkpoint inhibitors or Toll-like receptor agonists (TLRa). Moreover, chemotherapy can leukodeplete immunosuppressive host elements, including myeloid-derived suppressor cells (MDSCs) and regulatory T-cells (Tregs). We hypothesized that chemotherapy-induced leukodepletion could be immunopotentiated by co-administering TLRa to emulate a life-threatening infection...
July 12, 2016: Oncotarget
Ondřej Urban, Barbora Pipek, Ivana Mikoviny Kajzrlíková, Přemysl Falt, Petr Fojtík, Petr Vítek
OBJECTIVES: Piecemeal endoscopic mucosal resection (EMR) is frequently used for the treatment of non-poly-poid colorectal lesions larger than 20 mm. Nevertheless, local residual neoplasia occurs (LRN) in as much as 15 % of cases. The aim of our prospective interventional study was to evaluate the efficacy of treatment of LRN under standardized conditions. METHODS: In two high volume non-university endoscopy centers, LRN has been treated according to the newly proposed classification based on endoscopic appearance by argon plasma coagulation (APC), endoscopic mucosal resection (EMR) or endoscopic submucosal dissection (ESD)...
2016: Vnitr̆ní Lékar̆ství
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