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https://www.readbyqxmd.com/read/29343424/igf1-mapk-erk-signaling-pathway-mediated-programming-alterations-of-adrenal-cortex-cell-proliferation-by-prenatal-caffeine-exposure-in-male-offspring-rats
#1
Guanghui Chen, Chao Yuan, Fangfang Duan, Yanyan Liu, Jinzhi Zhang, Zheng He, Hegui Huang, Chunjiang He, Hui Wang
Our previous study proposed a glucocorticoid-insulin-like growth factor 1 (GC-IGF1) axis programming mechanism for prenatal caffeine exposure (PCE)-induced adrenal developmental dysfunction. Here, we focused on PCE-induced cell proliferation changes of the adrenal cortex in male offspring rats before and after birth and clarified the intrauterine programming mechanism. On gestational day (GD) 20, the PCE group had an elevated serum corticosterone level reduced fetal bodyweight, maximum adrenal sectional area, and elevated adrenal corticosterone and aldosterone contents...
January 14, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29339473/identification-of-thioredoxin-interacting-protein-txnip-as-a-downstream-target-for-igf1-action
#2
Karthik Nagaraj, Lena Lapkina-Gendler, Rive Sarfstein, David Gurwitz, Metsada Pasmanik-Chor, Zvi Laron, Shoshana Yakar, Haim Werner
Laron syndrome (LS), or primary growth hormone (GH) insensitivity, is the best-characterized entity among the congenital insulin-like growth factor 1 (IGF1) deficiencies. Life-long exposure to minute endogenous IGF1 levels is linked to low stature as well as a number of endocrine and metabolic abnormalities. While elevated IGF1 is correlated with increased cancer incidence, epidemiological studies revealed that patients with LS do not develop tumors. The mechanisms associated with cancer protection in LS are yet to be discovered...
January 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29339181/effects-of-age-on-growth-in-atlantic-bluefin-tuna-thunnus-thynnus
#3
Martina Api, Erica Bonfanti, Francesco Lombardo, Paolo Pignalosa, Gary Hardiman, Oliana Carnevali
Atlantic Bluefin Tuna Thunnus thynnus (ABFT) is considered one of the most important socio-economic species but there is a lack of information on the physiological and molecular processes regulating its growth and metabolism. In the present study, we focused on key molecules involved in growth process. The aim of the present study was to associate molecular markers related to growth with canonical procedures like morphological measurements such as curved fork length (CFL) and round weight (RWT). The ABFT specimens (n=41) were organized into three different groups A, B and C according to their age...
January 12, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29331887/idh1r132h-promotes-malignant-transformation-of-benign-prostatic-epithelium-by-dysregulating-micrornas-involvement-of-igf1r-akt-stat3-signaling-pathway
#4
Lili Zhang, Mei Qi, Tingting Feng, Jing Hu, Lin Wang, Xinjun Li, Wei Gao, Hui Liu, Meng Jiao, Zhen Wu, Xinnuo Bai, Yifan Bie, Long Liu, Bo Han
Risk stratification using molecular features could potentially help distinguish indolent from aggressive prostate cancer (PCa). Mutations in isocitrate dehydrogenase (IDH) acquire an abnormal enzymatic activity, resulting in the production of 2-hydroxyglutarate and alterations in cellular metabolism, histone modification, and DNA methylation. Mutant IDH1 has been identified in various human malignancies, and IDH1R132H constituted the vast majority of mutational events of IDH1. Most recent studies suggested that IDH1 mutations define a methylator subtype in PCa...
January 11, 2018: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/29330302/controlled-dimerization-of-insulin-like-growth-factor-1-and-insulin-receptors-reveal-shared-and-distinct-activities-of-holo-and-hybrid-receptors
#5
Jingci Chen, Alison M Nagle, Yu-Fen Wang, David N Boone, Adrian V Lee
Breast cancer development and progression is influenced by insulin-like growth factor 1 (IGF1R) and insulin receptor (InsR) signaling that drive cancer phenotypes such as cell growth, proliferation, and migration. IGF1R and InsR form IGF1R/InsR hybrid receptors (HybR) consisting of one molecule of IGF1R and one molecule of InsR. The specific signaling and functions of HybR are largely unknown as HybR is activated by both IGF1 and insulin, and no cellular system expresses HybR in the absence of holo-IGF1R or holo-InsR...
January 12, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29330027/selective-estrogen-receptor-modulator-ormeloxifene-suppresses-embryo-implantation-via-inducing-mir-140-and-targeting-insulin-like-growth-factor-1-receptor-in-rat-uterus
#6
Vijay K Sirohi, Kanchan Gupta, Rohit Kumar, Vinay Shukla, Anila Dwivedi
Ormeloxifene, the non-steroidal SERM contraceptive, inhibits endometrial receptivity and embryo implantation via countering nidatory estrogen. However, the molecular mechanism of ormeloxifene action responsible for its contraceptive efficacy still remains unclear. Herein, we aimed to identify the miRNAs modulated under the influence of ormeloxifene and to explore their role in endometrial receptivity and embryo implantation. By doing microRNA sequencing analysis, a total of 168 miRNAs were found to be differentially expressed in uterine tissue of ormeloxifene-treated rats, on day 5 (10:00 h) of pregnancy i...
January 9, 2018: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29320557/high-ahr-expression-in-breast-tumors-correlates-with-expression-of-genes-from-several-signaling-pathways-namely-inflammation-and-endogenous-tryptophan-metabolism
#7
Sophie Vacher, Patrice Castagnet, Walid Chemlali, François Lallemand, Didier Meseure, Marc Pocard, Ivan Bieche, Martine Perrot-Applanat
Increasing epidemiological and animal experimental data provide substantial support for the role of aryl hydrocarbon receptor (AhR) in mammary tumorigenesis. The effects of AhR have been clearly demonstrated in rodent models of breast carcinogenesis and in several established human breast cancer cell lines following exposure to AhR ligands or AhR overexpression. However, relatively little is known about the role of AhR in human breast cancers. AhR has always been considered to be a regulator of toxic and carcinogenic responses to environmental contaminants such as TCDD (dioxin) and benzo[a]pyrene (BaP)...
2018: PloS One
https://www.readbyqxmd.com/read/29295981/circulating-exosomes-suppress-the-induction-of-regulatory-t-cells-via-let-7i-in-multiple-sclerosis
#8
Kimitoshi Kimura, Hirohiko Hohjoh, Masashi Fukuoka, Wakiro Sato, Shinji Oki, Chiharu Tomi, Hiromi Yamaguchi, Takayuki Kondo, Ryosuke Takahashi, Takashi Yamamura
Multiple sclerosis (MS) is a T cell-mediated autoimmune disease of the central nervous system. Foxp3+ regulatory T (Treg) cells are reduced in frequency and dysfunctional in patients with MS, but the underlying mechanisms of this deficiency are unclear. Here, we show that induction of human IFN-γ-IL-17A-Foxp3+CD4+ T cells is inhibited in the presence of circulating exosomes from patients with MS. The exosomal miRNA profile of patients with MS differs from that of healthy controls, and let-7i, which is markedly increased in patients with MS, suppresses induction of Treg cells by targeting insulin like growth factor 1 receptor (IGF1R) and transforming growth factor beta receptor 1 (TGFBR1)...
January 2, 2018: Nature Communications
https://www.readbyqxmd.com/read/29295562/oncomirs-expression-profiling-in-uterine-leiomyosarcoma-cells
#9
Bruna Cristine de Almeida, Natalia Garcia, Giovana Maffazioli, Laura Gonzalez Dos Anjos, Edmund Chada Baracat, Katia Candido Carvalho
MicroRNAs (miRNAs) are small non-coding RNAs that act as regulators of gene expression at the post-transcriptional level. They play a key role in several biological processes. Their abnormal expression may lead to malignant cell transformation. This study aimed to evaluate the expression profile of 84 miRNAs involved in tumorigenesis in immortalized cells of myometrium (MM), uterine leiomyoma (ULM), and uterine leiomyosarcoma (ULMS). Specific cell lines were cultured and qRT-PCR was performed. Thirteen miRNAs presented different expression profiles in ULM and the same thirteen in ULMS compared to MM...
December 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29290648/relation-of-the-igf-igf1r-system-to-autophagy-in-colitis-and-colorectal-cancer
#10
REVIEW
Ferenc Sipos, Hajnal Székely, Imre Dániel Kis, Zsolt Tulassay, Györgyi Műzes
Metabolic syndrome (MetS), as a chronic inflammatory disorder has a potential role in the development of inflammatory and cancerous complications of the colonic tissue. The interaction of DNA damage and inflammation is affected by the insulin-like growth factor 1 receptor (IGF1R) signaling pathway. The IGF1R pathway has been reported to regulate autophagy, as well, but sometimes through a bidirectional context. Targeting the IGF1R-autophagy crosstalk could represent a promising strategy for the development of new antiinflammatory and anticancer therapies, and may help for subjects suffering from MetS who are at increased risk of colorectal cancer...
December 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29288977/maternal-nutritional-restriction-during-late-gestation-impairs-development-of-the-reproductive-organs-in-both-male-and-female-lambs
#11
F Hoffman, E Boretto, S Vitale, V Gonzalez, G Vidal, M F Pardo, M F Flores, F Garcia, G Bagnis, O C M Queiroz, M B Rabaglino
Maternal nutritional restrictions during late gestation could lead to fetal hypoglycemia. Glucose levels in the fetal sheep regulate circulating insulin-like growth factor 1 (IGF1) levels, which stimulate cell proliferation and differentiation of reproductive organs after binding to its own receptor or estrogen receptors. The objective of this study was to determine the effects of subnutrition of ewes during the last trimester of gestation on the serum glucose/IGF1 levels and development of reproductive organs in their lambs...
December 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/29285186/function-of-insulin-like-growth-factor-1-receptor-in-cancer-resistance-to-chemotherapy
#12
Jingsheng Yuan, Zhijie Yin, Kaixiong Tao, Guobing Wang, Jinbo Gao
Drug resistance is a primary cause of chemotherapeutic failure; however, how this resistance develops is complex. A comprehensive understanding of chemotherapeutic resistance mechanisms may aid in identifying more effective drugs and improve the survival rates of patients with cancer. Insulin-like growth factor 1 receptor (IGF1R), a member of the insulin receptor family, has been extensively assessed for biological activity, and its putative contribution to tumor cell development and progression. Furthermore, researchers have attended to drugs that target IGF1R since IGF1R functions as a membrane receptor...
January 2018: Oncology Letters
https://www.readbyqxmd.com/read/29282682/targeted-therapies-against-growth-factor-signaling-in-breast-cancer
#13
Juan Du, Yu Yu, Jun Zhan, Hongquan Zhang
Breast cancer is the most prevalent female malignancy throughout the world. Conventional treatment strategies for breast cancer consist of chemotherapy, radiation, surgery, chemoradiation, hormone therapy, and targeted therapies. Among them, targeted therapies show advantages to reduce cost and toxicity for being possible for individualized treatments based on the intrinsic subtypes of breast cancer. With deeper understanding of key signaling pathways concerning tumor growth and survival, growth factor-controlled signaling pathways are frequently dysregulated in the development and progression of breast cancer...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29277418/maternal-undernutrition-during-early-pregnancy-inhibits-postnatal-growth-of-the-tibia-in-the-female-offspring-of-rats-by-alteration-of-chondrogenesis
#14
Tomoko Kimura, Kodai Hino, Tadaaki Kono, Atsushi Takano, Norihisa Nitta, Noritoshi Ushio, Shinjiro Hino, Ryuta Takase, Motoi Kudo, Yataro Daigo, Wataru Morita, Mitsuyoshi Nakao, Masato Nakatsukasa, Toshihiro Tamagawa, Ashiq Mahmood Rafiq, Akihiro Matsumoto, Hiroki Otani, Jun Udagawa
Epidemiological research has suggested that birth weights are correlated with adult leg lengths. However, the relationship between prenatal undernutrition (UN) and postnatal leg growth remains controversial. We investigated the effects of UN during early pregnancy on postnatal hindlimb growth and determined whether early embryonic malnutrition affects the functions of postnatal chondrocytes in rats. Undernourished Wistar dams were fed 40% of the daily intake of rats in the control groups from gestational days 5...
December 22, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29262508/-expression-and-prognostic-significance-of-p-igf1r-in-gastric-cancer
#15
L Ge, J F Zhu, Z Yu, H J Wang
No abstract text is available yet for this article.
December 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/29251331/upregulation-of-igf1-by-tumor-associated-macrophages-promotes-the-proliferation-and-migration-of-epithelial-ovarian-cancer-cells
#16
Li Liu, Xinjing Wang, Xiaoduan Li, Xiaoli Wu, Meiling Tang, Xipeng Wang
Ovarian cancer (OC), of which epithelial ovarian cancer (EOC) is the most common, is the deadliest gynecological tumor because of the difficulties in detection at early stages, and metastasis and chemoresistance at advanced stages. Tumor-associated macrophages (TAMs) differentiate through alternative pathways and play important roles in tumor growth and metastasis. However, the underlying mechanism remains unclear. Here, we established a mouse TAM model using bone marrow monocytes and conditioned medium (CM) of TAMs to culture ID8 mouse EOC cells...
February 2018: Oncology Reports
https://www.readbyqxmd.com/read/29249638/androgen-receptor-overexpression-in-prostate-cancer-in-type-2-diabetes
#17
Stefan Zoltán Lutz, Jörg Hennenlotter, Marcus Oliver Scharpf, Corinna Sailer, Louise Fritsche, Vera Schmid, Konstantinos Kantartzis, Robert Wagner, Rainer Lehmann, Lucia Berti, Andreas Peter, Harald Staiger, Andreas Fritsche, Falko Fend, Tilman Todenhöfer, Arnulf Stenzl, Hans-Ulrich Häring, Martin Heni
OBJECTIVE: While prostate cancer does not occur more often in men with diabetes, survival is markedly reduced in this patient group. Androgen signaling is a known and major driver for prostate cancer progression. Therefore, we analyzed major components of the androgen signaling chain and cell proliferation in relation to type 2 diabetes. METHODS: Tumor content of 70 prostate tissue samples of men with type 2 diabetes and 59 samples of patients without diabetes was quantified by an experienced pathologist, and a subset of 51 samples was immunohistochemically stained for androgen receptor (AR)...
December 5, 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29249625/genetic-disorders-of-gh-action-pathway
#18
Horacio M Domené, Gustavo Fierro-Carrión
While insensitivity to GH (GHI) is characterized by low IGF-I levels, normal or elevated GH levels, and lack of IGF-I response to GH treatment, IGF-I resistance is characterized by elevated IGF-I levels with normal/high GH levels. Several genetic defects are responsible for impairment of GH and IGF-I actions resulting in short stature that could affect intrauterine growth or be present in the postnatal period. The genetic defects affecting GH and/or IGF-I action can be divided into five different groups: GH insensitivity by defects affecting the GH receptor (GHR), the intracellular GH signaling pathway (STAT5B, STAT3, IKBKB, IL2RG, PIK3R1), the synthesis of insulin-like growth factors (IGF1, IGF2), the transport/bioavailability of IGFs (IGFALS, PAPPA2), and defects affecting IGF-I sensitivity (IGF1R)...
December 12, 2017: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/29241458/inhibition-of-the-igf-signaling-pathway-reverses-cisplatin-resistance-in-ovarian-cancer-cells
#19
Juan Du, Hui-Rong Shi, Fang Ren, Jing-Lu Wang, Qing-Hua Wu, Xia Li, Rui-Tao Zhang
BACKGROUND: This study was aimed at investigating whether metformin can reverse the resistance of ovarian cancer cells to cisplatin and exploring the underlying mechanism. METHODS: Ovarian cancer cell proliferation in vitro was evaluated using a CCK-8 assay. The resistance index of platinum-resistant ovarian cancer cells was determined and cell cycle and apoptosis rate determined by annexin V/propidium iodide double-staining in CP70 cells. Western blotting was used to determine IGF1, IGF1R, AKT, p-IGF1, p-IGF1R, p-AKT, and MRP2 levels in cells treated with different concentrations of metformin and LY29400, an inhibitor of the insulin-like growth factor pathway...
December 14, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29238946/papp-a2-a-new-key-regulator-of-growth
#20
Magdalena Banaszak-Ziemska, Marek Niedziela
Short stature is the main problem that paediatric endocrinologists have to grapple with. Endocrine disorders account for only 5% of patients with short stature, but this is still one of the most common causes of reports to the endocrine clinic and hospitalisation in the endocrine department. A properly functioning growth hormone/insulin-like growth factor (GH/IGF) axis is one of the most important factors in proper growth. A lot of genetic defects in this axis lead to syndromes marked by impaired growth, like Laron syndrome, muta-tions in the STAT5B, insulin-like growth factor 1 (IGF1), and insulin-like growth factor 1 receptor (IGF1R) and mutations in the acid labile subunit (ALS)...
2017: Endokrynologia Polska
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