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IGF-1 and cancer

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https://www.readbyqxmd.com/read/28440508/expression-levels-of-microrna%C3%A2-455-and-its-potential-functions-by-targeting-igf%C3%A2-1r-in-melanoma
#1
Hui Wang, Liang Yu, Xiujuan Shan
Melanoma has the highest fatality and malignancy of all skin cancers. In cancer, microRNAs (miRNAs) act as tumor suppressors or oncogenes, and inactivation of oncogenic miRNAs or restoration of tumor suppressor miRNAs has potential for cancer treatment. In the present study, miR‑455 expression levels were examined in melanoma tissues and cell lines, and miR‑455 was significantly downregulated in melanoma compared with matched normal tissues or normal epidermal melanocytes. In addition, increasing miR‑455 expression in melanoma cells reduced cell proliferation and invasion...
April 12, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28433634/dual-sphingosine-kinase-inhibitor-ski-ii-enhances-sensitivity-to-5-fluorouracil-in-hepatocellular-carcinoma-cells-via-suppression-of-osteopontin-and-fak-igf-1r-signalling
#2
Petra Grbčić, Ivana Tomljanović, Marko Klobučar, Sandra Kraljević Pavelić, Ksenija Lučin, Mirela Sedić
Hepatocellular carcinoma (HCC) represents the third leading cause of cancer-related deaths globally. Although 5-Fluorouracil (5-FU) is used as the first choice treatment for advanced HCC, it exerts poor efficacy and is associated with acquired and intrinsic resistance. Sphingosine kinases (Sphk) 1 and 2 play tumour-promoting roles in different cancer types including HCC and thus represent promising pharmacological targets. In the present study, we have investigated for the first time the anticancer efficacy and underlying molecular mechanisms of combined administration of 5-FU and dual Sphk1/Sphk2 inhibitor SKI-II (4-[[4-(4-chlorophenyl)-1,3-thiazol-2-yl]amino]phenol) in HepG2 hepatocellular carcinoma cells...
April 19, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28427155/update-of-igf-1-receptor-inhibitor-ganitumab-dalotuzumab-cixutumumab-teprotumumab-and-figitumumab-effects-on-cancer-therapy
#3
REVIEW
Xiao Qu, Zhinan Wu, Wei Dong, Tiehong Zhang, Liguang Wang, Zhaofei Pang, Wei Ma, Jiajun Du
BACKGROUND: Prognostic studies of insulin-like growth factor-1 receptor(IGF-1R) inhibitors in cancer therapy had promising results in infratests, which exhibited that IGF-1R signalling was crucial in cancer cells growth. However, the conclusion of later clinical trials revealed a dim future for IGF-1R inhibitors to treat cancer. We conducted this analysis to figure out how IGF-1R inhibitors acted in clinical cancer therapy. MATERIAL AND METHODS: We searched up-to-date studies about the single agent of IGF-1R inhibitors or combination with other therapies in solid tumor...
February 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28420208/serum-insulin-like-growth-factor-axis-and-the-risk-of-pancreatic-cancer-systematic-review-and-meta-analysis
#4
Yuanfeng Gong, Bingyi Zhang, Yadi Liao, Yunqiang Tang, Cong Mai, Tiejun Chen, Hui Tang
OBJECTIVE: To investigate the association between serum concentration of insulin-like growth factor (IGF) and the risk of pancreatic cancer (PaC). METHODS: We identified eligible studies in Medline and EMBASE databases (no reference trials from 2014 to 2016) in addition to the reference lists of original studies and review articles on this topic. A summary of relative risks with 95% confidence intervals (CI) was calculated using a random-effects model. The heterogeneity between studies was assessed using Cochran Q and I² statistics...
April 18, 2017: Nutrients
https://www.readbyqxmd.com/read/28417914/interactions-of-the-insulin-like-growth-factor-axis-and-vitamin-d-in-prostate-cancer-risk-in-the-prostate-cancer-prevention-trial
#5
Fayth L Miles, Phyllis J Goodman, Catherine Tangen, Kathleen C Torkko, Jeannette M Schenk, Xiaoling Song, Michael Pollak, Ian M Thompson, Marian L Neuhouser
Some, but not all, epidemiologic studies report an association between vitamin D and prostate cancer risk. The inconsistent findings might be explained in the context of modification by members of the insulin-like growth factor (IGF) axis. Data and specimens for this nested case-control study (n = 1695 cases and n = 1682 controls) are from the Prostate Cancer Prevention Trial (PCPT). Baseline serum samples were assayed for 25(OH)D, IGF-1, IGF-2, IGFBP-2, IGFBP-3, and the ratio of IGF1:BP3, along with insulin-related markers c-peptide and leptin...
April 12, 2017: Nutrients
https://www.readbyqxmd.com/read/28414818/tgf%C3%AE-smad3-regulates-proliferation-and-apoptosis-through-irs-1-inhibition-in-colon-cancer-cells
#6
Katie L Bailey, Ekta Agarwal, Sanjib Chowdhury, Jiangtao Luo, Michael G Brattain, Jennifer D Black, Jing Wang
In this study, we have uncovered a novel crosstalk between TGFβ and IGF-1R signaling pathways. We show for the first time that expression and activation of IRS-1, an IGF-1R adaptor protein, is decreased by TGFβ/Smad3 signaling. Loss or attenuation of TGFβ activation leads to elevated expression and phosphorylation of IRS-1 in colon cancer cells, resulting in enhanced cell proliferation, decreased apoptosis and increased tumor growth in vitro and in vivo. Downregulation of IRS-1 expression reversed Smad3 knockdown-mediated oncogenic phenotypes, indicating that TGFβ/Smad3 signaling inhibits cell proliferation and increases apoptosis at least partially through the inhibition of IRS-1 expression and activation...
2017: PloS One
https://www.readbyqxmd.com/read/28410423/daf-18-pten-signals-through-aak-1-ampk-to-inhibit-mpk-1-mapk-in-feedback-control-of-germline-stem-cell-proliferation
#7
Patrick Narbonne, Paul S Maddox, Jean-Claude Labbé
Under replete growth conditions, abundant nutrient uptake leads to the systemic activation of insulin/IGF-1 signalling (IIS) and the promotion of stem cell growth/proliferation. Activated IIS can stimulate the ERK/MAPK pathway, the activation of which also supports optimal stem cell proliferation in various systems. Stem cell proliferation rates can further be locally refined to meet the resident tissue's need for differentiated progeny. We have recently shown that the accumulation of mature oocytes in the C...
April 14, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28409331/igf-1-has-sexually-dimorphic-pleiotropic-and-time-dependent-effects-on-healthspan-pathology-and-lifespan
#8
Nicole M Ashpole, Sreemathi Logan, Andriy Yabluchanskiy, Matthew C Mitschelen, Han Yan, Julie A Farley, Erik L Hodges, Zoltan Ungvari, Anna Csiszar, Sixia Chen, Constantin Georgescu, Gene B Hubbard, Yuji Ikeno, William E Sonntag
Reduced circulating levels of IGF-1 have been proposed as a conserved anti-aging mechanism that contributes to increased lifespan in diverse experimental models. However, IGF-1 has also been shown to be essential for normal development and the maintenance of tissue function late into the lifespan. These disparate findings suggest that IGF-1 may be a pleiotropic modulator of health and aging, as reductions in IGF-1 may be beneficial for one aspect of aging, but detrimental for another. We postulated that the effects of IGF-1 on tissue health and function in advanced age are dependent on the tissue, the sex of the animal, and the age at which IGF-1 is manipulated...
April 13, 2017: GeroScience
https://www.readbyqxmd.com/read/28407669/metformin-inhibits-n-methyl-n-nitrosourea-induced-gastric-tumorigenesis-in-db-db-mice
#9
Shan Zhuang, Yongmei Jian, Yongning Sun
Type 2 diabetes can elevate risk of gastric cancer and metformin, an anti-diabetic agent, has an inhibitory effect against gastric cancer cell in vitro. However, the effect of metformin on type 2 diabetes-related gastric tumorigenesis in vivo is still not clear. In the present study, we aim to detect whether metformin can inhibit increased risk of gastric cancer in diabetic db/db mice and which the potential anti-cancer mechanisms of metformin are. 4-week-old mice were divided into 3 groups (2 db/db mice groups and one wild type mice group)...
April 13, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28394654/inhibiting-igf-1r-attenuates-cell-proliferation-and-vegf-production-in-igf-1r-over-expressing-egfr-mutant-non-small-cell-lung-cancer-cells
#10
Chang Dong Yeo, Young Ae Kim, Hwa Young Lee, Jin Woo Kim, Sang Haak Lee, Seung Joon Kim, Soon Seog Kwon, Yong Hyun Kim, Seok Chan Kim
PURPOSE: The aim of the present study was to demonstrate the role of insulin-like growth factor-1 receptor (IGF-1R) tyrosine kinase inhibitors (TKIs) in IGF-1R expressed epidermal growth factor receptor (EGFR) mutant cells. MATERIALS AND METHODS: Human lung adenocarcinoma PC9, HCC827, and H1975 cells were exposed to a combination of IGF-1, gefitinib, or linsitinib. Cell viability was assessed by the MTT assay. The expression of EGFR, IGF-1R, AKT, extracellular regulated kinases 1 and 2 (ERK1/2), cleaved poly ADP ribose polymerase (PARP), cleaved caspase 3, and hypoxia-inducible factor (HIF)-1α were measured by Western blot...
February 2017: Experimental Lung Research
https://www.readbyqxmd.com/read/28389653/identification-of-igf-1-enhanced-cytokine-expressions-targeted-by-mir-181d-in-glioblastomas-via-an-integrative-mirna-mrna-regulatory-network-analysis
#11
Kuo-Hao Ho, Peng-Hsu Chen, Edward Hsi, Chwen-Ming Shih, Wei-Chiao Chang, Chia-Hsiung Cheng, Cheng-Wei Lin, Ku-Chung Chen
The insulin-like growth factor (IGF)-1 signaling is relevant in regulating cell growth and cytokine secretions by glioblastomas. MicroRNAs determine the cell fate in glioblastomas. However, relationships between IGF-1 signaling and miRNAs in glioblastoma pathogenesis are still unclear. Our aim was to validate the IGF-1-mediated mRNA/miRNA regulatory network in glioblastomas. Using in silico analyses of mRNA array and RNA sequencing data from The Cancer Genome Atlas (TCGA), we identified 32 core enrichment genes that were highly associated with IGF-1-promoted cytokine-cytokine receptor interactions...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28373962/the-influence-of-different-calorie-restriction-protocols-on-serum-pro-inflammatory-cytokines-adipokines-and-igf-i-levels-in-female-c57bl6-mice-short-term-and-long-term-diet-effects
#12
Soner Dogan, Amitabha Ray, Margot P Cleary
Calorie restriction (CR) is an effective intervention to prevent chronic diseases including cancer. Although many factors, i.e., sex hormones, IGF-I and mTOR have been studied in response to CR, the molecular mechanisms of CR remain to be identified. Our objective was to determine the short and long-term effects of different CR protocols on pro-inflammatory cytokines. Our hypothesis was that Intermittent CR (ICR) would result in greater inhibition of pro-inflammatory serum cytokines compared to Chronic CR (CCR) as we previously found ICR to be more protective in the prevention of mammary tumor development...
June 2017: Meta Gene
https://www.readbyqxmd.com/read/28369940/single-nucleotide-polymorphisms-in-the-igf-irs-pathway-are-associated-with-outcome-in-mcrc-patients-enrolled-in-the-fire-3-trial
#13
Marta Schirripa, Wu Zhang, Volker Heinemann, Shu Cao, Satoshi Okazaki, Dongyun Yang, Fotios Loupakis, Martin D Berger, Yan Ning, Yuji Miyamoto, Mitsukuni Suenaga, Roel F Gopez, Jordan D West, Diana Hanna, Afsaneh Barzi, Alfredo Falcone, Sebastian Stintzing, Heinz-Josef Lenz
The Insulin-like growth factor (IGF)/IGF-receptor pathway with its scaffolding proteins Insulin Receptor Substrate (IRS)1 and IRS2 are crucial regulators of metabolism and progression in metastatic colorectal cancer (mCRC). The goal of the study was the identification of predictive and prognostic markers among IRS1, IRS2, IGF1 and IGF-1R SNPs in mCRC patients enrolled in the FIRE-3 trial. Four SNPs of IRS (IRS1 rs1801278, rs1801123; IRS2 rs1805097, rs2289046) and 4 SNPs of IGF1-IGFR1 (rs6214, rs6220, rs2946834, rs2016347) were analyzed by PCR/direct-sequencing in the FIRE-3 trial...
April 1, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28366834/the-wilms-tumor-protein-wt1-stimulates-transcription-of-the-gene-encoding-insulin-like-growth-factor-binding-protein-5-igfbp5
#14
Miriam Müller, Anja Bondke Persson, Katharina Krueger, Karin M Kirschner, Holger Scholz
Insulin-like growth factor (IGF) binding proteins (IGFBPs) constitute a family of six secreted proteins that regulate the signaling of insulin-like growth factors (IGFs). IGFBP5 is the most conserved family member in vertebrates and the major IGF binding protein in bone. IGFBP5 is required for normal development of the musculoskeletal system, and various types of cancer frequently express high levels of IGFP5. Here we identify the gene encoding IGFBP5 as a novel downstream target of the Wilms tumor protein WT1...
March 30, 2017: Gene
https://www.readbyqxmd.com/read/28365890/expressions-of-insulin-like-growth-factor-receptor-1-and-cezanne-1-in-lung-adenocarcinoma
#15
Zhaofei Pang, Lixuan Cui, Nan Ding, Linhai Zhu, Xiao Qu, Wei Dong, Jiajun Du, Qi Liu
IGF1R (insulin-like growth factor receptor-1) was confirmed to play a significant role in the development of cancer. Cezanne-1 overexpression was considered to be associated with enhancement of EGFR signaling pathway and reduced degeneration of EGFR. There was a close relationship between EGFR and IGFR as previous study showed. Dynamic balance between receptor ubiquitination and deubiquitination was critical in the process of termination of IGF signaling pathway. So we conducted an IHC staining to initially prove the correlation...
May 2017: Medical Oncology
https://www.readbyqxmd.com/read/28364785/stable-silencing-of-igf1r-using-lentiviral-mediated-shrna-in-hek293t-cells
#16
L Nasehi, M H Ghahremani, K Yavari, J Hadjati, A Fallah, B Abdolhossein Zadeh, Z Saltanatpour
Insulin-like growth factors are among the peptide mitogens that regulate cell proliferation and differentiation as well as mediator of antiapoptotic signals. The imbalance between the expression and activities of these molecules may lead to malignancy in cells. Evidences have suggested the insulin-like growth factor 1 receptor (IGF-1R) signaling pathway as a therapeutic target in the management and treatment of cancer. In this present study, we have generated silencing stable clones of HEK cells using six different pGIPZ (lentiviral vector) shRNAs targeted to human IGF-1R gene and a pGIPZ non-silencing shRNAmir lentiviral vector (as negative control)...
February 28, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28363795/glucagon-like-petide-2-acts-on-colon-cancer-myofibroblasts-to-stimulate-proliferation-migration-and-invasion-of-both-myofibroblasts-and-cancer-cells-via-the-igf-pathway
#17
Marianne Shawe-Taylor, J Dinesh Kumar, Whitney Holden, Steven Dodd, Akos Varga, Olivier Giger, Andrea Varro, Graham J Dockray
Glucagon-like peptide (GLP)-2 stimulates intestinal epithelial proliferation by acting, in part, via IGF release from sub-epithelial myofibroblasts. The response of myofibroblasts to GLP-2 remains incompletely understood. We studied the action of GLP-2 on myofibroblasts from colon cancer and adjacent tissue, and the effects of conditioned medium from these cells on epithelial cell proliferation, migration and invasion. GLP-2 stimulated proliferation, migration and invasion of myofibroblasts and the proliferative and invasive responses of cancer-associated myofibroblasts were greater than those of myofibroblasts from adjacent tissue...
March 29, 2017: Peptides
https://www.readbyqxmd.com/read/28362176/co-delivery-of-insulin-like-growth-factor-1-receptor-specific-sirna-and-doxorubicin-using-chitosan-based-nanoparticles-enhanced-anticancer-efficacy-in-a549-lung-cancer-cell-line
#18
Hajar Shali, Mahdi Shabani, Fatemeh Pourgholi, Mahsa Hajivalili, Leili Aghebati-Maleki, Farhad Jadidi-Niaragh, Behzad Baradaran, Ali Akbar Movassaghpour Akbari, Vahid Younesi, Mehdi Yousefi
Here, we investigated the effects of dual delivery of IGF-1R siRNA and doxorubicin by chitosan nanoparticles on viability of A549 lung cancer cells line by utilization of MTT and qRT-PCR. Furthermore apoptosis and migration of treated cells were assessed by Annexin-PI and wound healing assays, respectively. The chitosan nanoparticles had about 176 nm size with zeta potential and polydispersive index about 11 mV and 0.3, respectively. The IGF-1R siRNA had synergistic effect on DOX-induced cytotoxicity and apoptosis in tumour cells...
March 31, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28361446/does-milk-intake-promote-prostate-cancer-initiation-or-progression-via-effects-on-insulin-like-growth-factors-igfs-a-systematic-review-and-meta-analysis
#19
REVIEW
Sean Harrison, Rosie Lennon, Jeff Holly, Julian P T Higgins, Mike Gardner, Claire Perks, Tom Gaunt, Vanessa Tan, Cath Borwick, Pauline Emmet, Mona Jeffreys, Kate Northstone, Sabina Rinaldi, Stephen Thomas, Suzanne D Turner, Anna Pease, Vicky Vilenchick, Richard M Martin, Sarah J Lewis
PURPOSE: To establish whether the association between milk intake and prostate cancer operates via the insulin-like growth factor (IGF) pathway (including IGF-I, IGF-II, IGFBP-1, IGFBP-2, and IGFBP-3). METHODS: Systematic review, collating data from all relevant studies examining associations of milk with IGF, and those examining associations of IGF with prostate cancer risk and progression. Data were extracted from experimental and observational studies conducted in either humans or animals, and analyzed using meta-analysis where possible, with summary data presented otherwise...
March 30, 2017: Cancer Causes & Control: CCC
https://www.readbyqxmd.com/read/28350325/endogenously-expressed-il-4r%C3%AE-promotes-the-malignant-phenotype-of-human-pancreatic-cancer-in-vitro-and-in-vivo
#20
Benno Traub, Lie Sun, Yongsu Ma, Pengfei Xu, Johannes Lemke, Stephan Paschke, Doris Henne-Bruns, Uwe Knippschild, Marko Kornmann
Exogenous interleukin-4 (IL-4) has been demonstrated to affect the growth of different human malignancies including pancreatic cancer cells. The aim of our study was to determine the role of endogenously expressed IL-4-receptor-α-chain (IL-4Rα) in pancreatic cancer cells. IL-4Rα-suppression was achieved by generating Capan-1 cells stably expressing shRNA targeting IL-4Rα. The malignant phenotype was characterized by assessing growth properties, directional and non-directional cell movement in vitro and tumor growth in vivo...
March 28, 2017: International Journal of Molecular Sciences
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