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Byung-Chul Kim, Sung-Min Jun, So Yeon Kim, Yong-Dae Kwon, Sung Chul Choe, Eun-Chul Kim, Jae-Hyung Lee, Jinseok Kim, Jun-Kyo Farancis Suh, Yu-Shik Hwang
The in vitro generation of cell-based three dimensional (3D) nerve tissue is an attractive subject to improve graft survival and integration into host tissue for neural tissue regeneration or to model biological events in stem cell differentiation. Although 3D organotypic culture strategies are well established for 3D nerve tissue formation of pluripotent stem cells to study underlying biology in nerve development, cell-based nerve tissues have not been developed using human postnatal stem cells with therapeutic potential...
October 24, 2016: Biotechnology and Bioengineering
Miho Nakamichi, Yuri Akishima-Fukasawa, Chie Fujisawa, Tetsuo Mikami, Kiyoshi Onishi, Yoshikiyo Akasaka
The precise role of fibrocytes in angiogenesis in wounds remains unclear. We therefore demonstrated the specific changes in fibrocyte accumulation for angiogesis in basic fibroblast growth factor (bFGF)-treated wounds. bFGF-treated wounds exhibited marked formation of arterioles and inhibition of podoplanin(+) lymph vessels that were lacking in vascular endothelial growth factor-A-treated wounds. Real-time PCR in bFGF-treated wounds manifested enhanced expression of CD34, CD31, and bFGF mRNA and reduced expression of podoplanin and collagen type I, III, and IV mRNA...
October 20, 2016: American Journal of Pathology
Mi Du, Ting Zhu, Xiaoqi Duan, Shaohua Ge, Ning Li, Qinfeng Sun, Pishan Yang
New generation of barrier membranes has been developed, which not only act as barriers but also as delivery devices to release specific growth factors. This study observed biological behaviors of bone morrow mesenchymal stem cells (BMMSCs) pretreated by bFGF or BMP-2 in vitro and evaluated differential bone regeneration process induced by bFGF and BMP-2 loaded acellular dermal matrix (ADM) membrane using critical-size rat calvarial defect model in vivo. The results showed that the proliferation capability of BMMSCs pretreated by bFGF was stronger than that by BMP-2, while there was temporally differential effect of bFGF and BMP-2 pretreatment on MSC osteogenic differentiation potentials...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Alice C Wyse-Jackson, Sarah L Roche, Ana M Ruiz-Lopez, Jennifer N Moloney, Ashleigh M Byrne, Thomas G Cotter
Retinitis pigmentosa (RP) is a degenerative retinal disease leading to photoreceptor cell loss. In 2011, our group identified the synthetic progesterone 'Norgestrel' as a potential treatment for RP. Subsequent research showed Norgestrel to work through progesterone receptor membrane component 1 (PGRMC1) activation and upregulation of neuroprotective basic fibroblast growth factor (bFGF). Using trophic factor deprivation of 661W photoreceptor-like cells, we aimed to further elucidate the mechanism leading to Norgestrel-induced neuroprotection...
October 20, 2016: European Journal of Neuroscience
Z Riedelová-Reicheltová, E Brynda, T Riedel
Fibrin is a versatile biopolymer that has been extensively used in tissue engineering. In this paper fibrin nanostructures prepared using a technique based on the catalytic effect of fibrin-bound thrombin are presented. This technique enables surface-attached thin fibrin networks to form with precisely regulated morphology without the development of fibrin gel in bulk solution. Moreover, the influence of changing the polymerization time, along with the antithrombin III and heparin concentrations on the morphology of fibrin nanostructures was explored...
October 20, 2016: Physiological Research
Leonardo Romorini, Ximena Garate, Gabriel Neiman, Carlos Luzzani, Verónica Alejandra Furmento, Alejandra Sonia Guberman, Gustavo Emilio Sevlever, María Elida Scassa, Santiago Gabriel Miriuka
Human embryonic and induced pluripotent stem cells are self-renewing pluripotent stem cells (PSC) that can differentiate into a wide range of specialized cells. Basic fibroblast growth factor is essential for PSC survival, stemness and self-renewal. PI3K/AKT pathway regulates cell viability and apoptosis in many cell types. Although it has been demonstrated that PI3K/AKT activation by bFGF is relevant for PSC stemness maintenance its role on PSC survival remains elusive. In this study we explored the molecular mechanisms involved in the regulation of PSC survival by AKT...
October 20, 2016: Scientific Reports
Rosalia Pellitteri, Roberta Bonfanti, Michela Spatuzza, Maria Teresa Cambria, Mariacristina Ferrara, Giuseppina Raciti, Agata Campisi
Herein, we assessed in a particular glial cell type, called olfactory ensheathing cells (OECs), the effect of some growth factors (GFs) on tissue transglutaminase (TG2) overexpression induced by amyloid-beta (Aβ) with native full-length peptide 1-42 or by fragments, 25-35 or 35-25, as control. Previously, we demonstrated that TG2 overexpression induced by some stressors was down-regulated by GFs exposure in OECs. To monitor cell viability, an MTT test was used, while TG2 expression was examined using immunocytochemical and Western blot analysis...
October 18, 2016: Molecular Neurobiology
Corinne G Wong, Mehran Taban, Kathryn Osann, Fred N Ross-Cisneros, T C Bruice, Grit Zahn, Timothy You
PURPOSE: Intravitreal vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) produced florid retinal neovascularization and hemorrhage in the rabbit. This study seeks to determine whether sustained subchoroidal release of both VEGF and bFGF can induce robust choroidal neovascularization (CNV) in the rabbit. METHODS: Subchoroidal implantation through the sclera of polymeric pellets containing both 15 μg VEGF and 15 μg bFGF was performed on adult pigmented male Dutch belted rabbits (N = 6) and NZW albinos (N = 8)...
October 17, 2016: Current Eye Research
Su Jung Hwang, Hyeung-Geun Park, Yohan Park, Hyo-Jong Lee
Previously, we reported that α-quaternary chiral lactam derivatives have broad spectrum anticancer activity. However, the underlying molecular mechanisms and its relevance are largely unknown. In the present study, we report progress on α-quaternary chiral lactam analogues that address this, focusing on the novel analogue YH-304 as a candidate to broadly target human cancer cells. The effect of YH-304 on cell transformation was assessed by clonogenic assay in non-small cell lung cancer cells (NSCLCs) A549 and 226B...
October 11, 2016: International Journal of Oncology
Natàlia Vilà, Jacqueline Coblentz, Carlos Moreira-Neto, Vasco Bravo-Filho, Pablo Zoroquiain, Miguel N Burnier
PURPOSE: To determine whether pretreatment of retinal pigmented epithelial (RPE) cells with lutein can affect the response of cells to bevacizumab therapy. METHODS: One human RPE cell line (ARPE-19) was used for all experiments. The cells were treated with lutein in different concentrations (0.01, 0.1, 1, 10, or 100 μg/ml). After 24 h, all plates were treated with bevacizumab (0.25 mg/ml). Media were harvested 24 h later for sandwich ELISA-based angiogenesis arrays...
October 15, 2016: Ophthalmic Research
Yang Hu, Weihua Dan, Shanbai Xiong, Yang Kang, Arvind Dhinakar, Jun Wu, Zhipeng Gu
: To improve the mechanical properties and biocompatibility of collagen I matrix, a novel and facile strategy was developed to modify porcine acellular dermal matrix (PADM) via dopamine self-polymerization followed by collagen immobilization to enhance the biological, mechanical and physicochemical properties of PADM. Mechanism study indicated that the polymerization of dopamine onto PADM surface could be regulated by controlling the amount of hydrogen bonds forming between phenol hydroxyl (COH) and nitrogen atom (NCO) within collagen fibers of PADM...
October 12, 2016: Acta Biomaterialia
Lin Luo, Rica Tanaka, Shigeyuki Kanazawa, Feng Lu, Ayato Hayashi, Takehiko Yokomizo, Hiroshi Mizuno
AIMS: The synthetic leukotriene B4 receptor type 2 (BLT2) agonist CAY10583 (CAY) accelerates wound healing in diabetic mice by promoting keratinocyte migration. However, its effects on fibroblast activity and granulation are unknown. We investigated the mechanisms by which CAY promotes wound healing. METHODS: CAY was applied to wounds on streptozotocin-induced diabetic rats, and wound closure, granulation thickness, and epithelialization gaps were analyzed. BLT2 expression was examined by RT-PCR...
September 14, 2016: Journal of Diabetes and its Complications
Wen-Juan Lu, Scheffer C G Tseng, Shuangling Chen, Sean Tighe, Yuan Zhang, Xin Liu, Szu-Yu Chen, Chen-Wei Su, Ying-Ting Zhu
Human corneal endothelial cells (HCECs) have limited proliferative capacity due to "contact-inhibition" at G1 phase. Such contact-inhibition can be delayed from Day 21 to Day 42 by switching EGF-containing SHEM to LIF/bFGF-containing MESCM through transient activation of LIF-JAK1-STAT3 signaling that delays eventual nuclear translocation of p16(INK4a). Using the latter system, we have reported a novel tissue engineering technique by implementing 5 weekly knockdowns with p120 catenin (p120) and Kaiso siRNAs since Day 7 to achieve effective expansion of HCEC monolayers to a transplantable size with a normal HCEC density, through reprogramming of HCECs into neural crest progenitors by activating p120-Kaiso-RhoA-ROCK-canonical BMP signaling...
October 14, 2016: Scientific Reports
Zhengxing Ge, Bo Li, Xun Zhou, Yi Yang, Jun Zhang
Chronic obstructive pulmonary disease (COPD) is featured by aberrant extracellular matrix (ECM) deposition. Trigger of the β-catenin/RhoA pathway has been involved in aberrant ECM deposition in several diseases. We investigated WNT signaling activation in primary pulmonary fibroblasts of rats with and without COPD and the function of WNT signaling in pulmonary fibroblast. We evaluated the expression of WNT signaling and the role of β-catenin, using MRC-5 fibroblasts and primary lung fibroblasts of rats with and without COPD...
October 13, 2016: Molecular and Cellular Biochemistry
Qin Shi, Dan Zhang, Zhen Huang, Peng Sun, Haiping Huang, Yunmei Zhang, Jianwu Dai, Jisheng Liu
Traumatic tympanic membrane (TM) perforation is very common in clinical practice. Several biomaterials have been reported to play a role in TM reparation, whereas their functional recovery is limited when used alone. Meanwhile, the administration of bio-factors could promote functional recovery, but rapid distribution and short half-time obstruct their application. In order to study the effect on of traumatic TM regeneration, we prepared collagen membrane (CM) integrated with collagen-binding basic fibroblast growth factor (CBD-bFGF) and implanted into the injury site of perforated TM in Sprague-Dawley (SD) rats...
October 12, 2016: Tissue Engineering. Part A
Łukasz Piotr Fus, Barbara Górnicka
INTRODUCTION: Bladder cancer is the most common urinary tract malignancy in western countries. In recent years, extensive research has suggested that angiogenesis plays an important role in bladder cancer biology, contributing to tumor growth and progression. MATERIAL AND METHODS: In this review, we discuss general mechanisms of angiogenesis and highlight the influence of pro- and anti-angiogenic factors, and cancer stem cells on bladder cancer biology, their relation to disease progression, and potential use in novel targeted therapies...
2016: Central European Journal of Urology
Mitsuharu Endo, Guljahan Ubulkasim, Chiho Kobayashi, Reiko Onishi, Atsu Aiba, Yasuhiro Minami
Ror2 receptor tyrosine kinase plays crucial roles in developmental morphogenesis and tissue-/organo-genesis. In the developing brain, Ror2 is expressed in neural stem/progenitor cells (NPCs) and involved in the regulation of their stemness. However, it remains largely unknown about its role in the adult brain. In this study, we show that Ror2 is up-regulated in reactive astrocytes in the neocortices within 3 days following stab-wound injury. Intriguingly, Ror2-expressing astrocytes were detected primarily at the area surrounding the injury site, where astrocytes express Nestin, a marker of NPCs, and proliferate in response to injury...
October 11, 2016: Glia
Shira Toledano, Huayi Lu, Agustina Palacio, Boaz Kigel, Ofra Kessler, Gilad Allon, Yoreh Barak, Gera Neufeld, Shlomit Schaal
Abnormal subretinal choroidal neovascularization (CNV) is a major cause of blindness in exudative age-related macular degeneration (AMD). Current anti-angiogenic treatments by VEGF sequestering agents have been successful, but a significant proportion of patients do not respond well to these treatments, and the response of others diminishes over time, suggesting that additional anti-angiogenic agents that function by separate mechanisms may be of use to such patients. We have previously found that a point mutated form of semaphorin-3E resistant to cleavage by furin like pro-protein convertases (UNCL-Sema3E) displays potent anti-angiogenic properties...
October 7, 2016: Experimental Eye Research
Somayeh Tavana, Mahnaz Azarnia, Mojtaba Rezazadeh Valojerdi, Abdolhossein Shahverdi
One of the problems encountered during ovarian transplantation is that the number of primordial follicles in the grafts is considerably reduced 2 d after transplantation due to post-transplantation ischemia. This study investigates if the use of hyaluronic acid-based hydrogel (HABH) with and without vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) could prevent or minimize ischemia-induced follicle loss during ovarian autotransplantation and thereby restore ovarian tissue function in the rat model...
October 6, 2016: Biomedical Materials
Bulent Kaya, Onur Çiçek, Fatih Erdi, Siddika Findik, Yasar Karatas, Hasan Esen, Fatih Keskin, Erdal Kalkan
The present study was designed to evaluate the expression of vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF) and thioredoxin reductase 1 (TrxR1) in glioblastoma multiforme (GBM) with and without intratumoral hemorrhage. Surgically resected human GBM samples from 20 patients who underwent surgery at our institute were extracted from the histopathological specimens and divided into two groups. A total of 10 samples from each type of GBM (World Health Organization grade IV, intratumoral hemorrhage-positive or -negative) were included in each group...
October 2016: Molecular and Clinical Oncology
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