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Collagen type I

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https://www.readbyqxmd.com/read/29331090/enhanced-chondrogenesis-of-mesenchymal-stem-cells-over-silk-fibroin-chitosan-chondroitin-sulfate-three-dimensional-scaffold-in-dynamic-culture-condition
#1
Parinita Agrawal, Krishna Pramanik, Varshini Vishwanath, Amit Biswas, Akalabya Bissoyi, Pradeep Kumar Patra
Chondroitin sulfate (Ch) is one of the main structural components of cartilage tissue, therefore, its presence in tissue engineered scaffold is expected to enhance cartilage regeneration. Previously, silk fibroin/chitosan (SF/CS) blend was proven to be a potential biomaterial for tissue development. In this study, the effect of Ch on physicochemical and biological properties of SF/CS blend was investigated and scaffolds with 0.8 wt% Ch was found to be favorable. The scaffolds possess pore size of 37-212 µm, contact angle 46...
January 13, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29330940/extracorporeal-shockwave-therapy-for-treatment-of-keloid-scars
#2
Ching-Jen Wang, Jih-Yang Ko, Wen-Yi Chou, Jai-Hong Cheng, Yur-Ren Kuo
The purpose of this investigation was to study the effectiveness of extracorporeal shockwave therapy (ESWT) for the treatment of keloid scars, and compared the results with intralesional steroid injection. Thirty-nine patients were randomly divided into 22 in ESWT group and 17 in steroid group. The ESWT group received 3 ESWT treatments in 6 weeks. The steroid group received 3 intra-lesional triamcinolone injections in 6 weeks. The evaluations included gross morphology, functional outcome, local blood flow perfusion, biopsy for histopathological examination and immunohistochemical analysis...
January 13, 2018: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/29330473/endothelial-heparan-sulfate-deficiency-reduces-inflammation-and-fibrosis-in-murine-diabetic-nephropathy
#3
Ditmer T Talsma, Kirankumar Katta, Marieke A B Ettema, Berna Kel, Marion Kusche-Gullberg, Moh R Daha, Coen A Stegeman, Jacob van den Born, Lianchun Wang
Inflammation plays a vital role in the development of diabetic nephropathy, but the underlying regulatory mechanisms are only partially understood. Our previous studies demonstrated that, during acute inflammation, endothelial heparan sulfate (HS) contributes to the adhesion and transendothelial migration of leukocytes into perivascular tissues by direct interaction with L-selectin and the presentation of bound chemokines. In the current study, we aimed to assess the role of endothelial HS on chronic renal inflammation and fibrosis in a diabetic nephropathy mouse model...
January 12, 2018: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/29330036/regulation-of-fibrotic-changes-by-the-synergistic-effects-of-cytokines-dimensionality-and-matrix-towards-the-development-of-an-in-vitro-human-dermal-hypertrophic-scar-model
#4
Shikha Chawla, Sourabh Ghosh
Current therapeutic strategies to reduce scarring in full thickness skin defect offer limited success due to poor understanding of scar tissue formation and the underlying signaling pathways. There is an urgent need to develop human cell based in vitro scar tissue models as animal testing is associated with ethical and logistic complications and inter-species variations. Pro-inflammatory cytokines play critical role in regulating scar development through complex interplay and interaction with the ECM and corresponding signaling pathways...
January 9, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29329687/bubble-induced-color-doppler-feedback-correlates-with-histotripsy-induced-destruction-of-structural-components-in-liver-tissue
#5
Jonathan J Macoskey, Xi Zhang, Timothy L Hall, Jiaqi Shi, Shahaboddin Alahyari Beig, Eric Johnsen, Fred T Lee, Charles A Cain, Zhen Xu
Bubble-induced color Doppler (BCD) is a histotripsy-therapy monitoring technique that uses Doppler ultrasound to track the motion of residual cavitation nuclei that persist after the collapse of the histotripsy bubble cloud. In this study, BCD is used to monitor tissue fractionation during histotripsy tissue therapy, and the BCD signal is correlated with the destruction of structural and non-structural components identified histologically to further understand how BCD monitors the extent of treatment. A 500-kHz, 112-element phased histotripsy array is used to generate approximately 6- × 6- × 7-mm lesions within ex vivo bovine liver tissue by scanning more than 219 locations with 30-1000 pulses per location...
January 9, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29329547/microfluidic-co-culture-of-pancreatic-tumor-spheroids-with-stellate-cells-as-a-novel-3d-model-for-investigation-of%C3%A2-stroma-mediated-cell-motility-and-drug-resistance
#6
Ji-Hyun Lee, Seul-Ki Kim, Iftikhar Ali Khawar, Su-Yeong Jeong, Seok Chung, Hyo-Jeong Kuh
BACKGROUND: Pancreatic stellate cells (PSCs), a major component of the tumor microenvironment in pancreatic cancer, play roles in cancer progression as well as drug resistance. Culturing various cells in microfluidic (microchannel) devices has proven to be a useful in studying cellular interactions and drug sensitivity. Here we present a microchannel plate-based co-culture model that integrates tumor spheroids with PSCs in a three-dimensional (3D) collagen matrix to mimic the tumor microenvironment in vivo by recapitulating epithelial-mesenchymal transition and chemoresistance...
January 12, 2018: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/29329516/bilateral-giant-retinal-tears-in-osteogenesis-imperfecta
#7
Paolo Scollo, Martin Paul Snead, Allan James Richards, Rebecca Pollitt, Catherine DeVile
BACKGROUND: Osteogenesis imperfecta (OI) is a rare primarily autosomal dominant condition in which the connective tissues of bones, ligaments and sclerae do not form properly. Typically, mutations in COL1A1 and COL1A2 genes lead to the defective formation or quantity of type I collagen, the principle matrix in these tissues. Molecular genetic studies have now elucidated multiple genetic subtypes of the disorder but little literature exists on the risk of retinal tears and detachments in OI...
January 12, 2018: BMC Medical Genetics
https://www.readbyqxmd.com/read/29329467/low-aromatase-activity-and-estradiol-sex-hormone-binding-globulin-ratio-are-associated-with-total-hip-bone-mineral-density-and-the-presence-of-osteoporosis-a-study-in-chinese-postmenopausal-women
#8
Hai-Juan Liu, Jun Yan, Yan Li, Fang-Yuan Zhou, Xu-Dong Su, Hui-Jing Fan, Jie Bai, Guang-Zhen Zhang
Several groups have reported the important role of estradiol (E2) and testosterone (T) in postmenopausal osteoporosis (PMOP). Because aromatase catalyzes the conversion of T to E2, the purpose of this study was to determine the influence of aromatase activity on the bone mineral density (BMD) in postmenopausal women. A total of 344 postmenopausal women were selected for this study. Serum E2, T, sex hormone-binding globulin (SHBG), calcium (Ca), alkaline phosphatase (ALP), C-terminal telopeptide of type I collagen (CTX), and procollagen type I amino-terminal propeptide (PINP) were examined...
January 2018: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/29328885/radiographic-emphysema-circulating-bone-biomarkers-and-progressive-bone-mineral-density-loss-in-smokers
#9
Jessica Bon, Yingze Zhang, Joseph K Leader, Carl Fuhrman, Subashan Perera, Divay Chandra, Marnie Bertolet, Brenda Diergaarde, Susan L Greenspan, Frank C Sciurba
RATIONALE: Osteoporosis is common in individuals with chronic obstructive pulmonary disease. Lung-specific factors, including radiographic emphysema, independently associate with low bone mineral density (BMD) in cross-sectional smoking cohorts. However, factors associated with progressive bone loss in smokers are under-studied and largely unknown. OBJECTIVES: To determine the relationship between radiographic emphysema, circulating bone metabolism markers, and pulmonary function and accelerated BMD loss in smokers...
January 12, 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29328490/galectin-1-expression-in-activated-pancreatic-satellite-cells-promotes-fibrosis-in-chronic-pancreatitis-pancreatic-cancer-via-the-tgf-%C3%AE-1-smad-pathway
#10
Dong Tang, Qi Wu, Jingqiu Zhang, Hongpeng Zhang, Zhongxu Yuan, Jiaming Xu, Yang Chong, Yuqin Huang, Qingquan Xiong, Sen Wang, Ying Tian, Yongdie Lu, Xiao Ge, Wenjing Shen, Daorong Wang
Chronic pancreatitis/pancreatic cancer (CP/PC) is characterized by fibrous connective tissue proliferation induced by activated pancreatic stellate cells (PSCs). Galectin-1 is upregulated in activated PSCs and is important for the continuing activation of PSCs. The aim of this study was to evaluate the effect of galectin-1 derived from activated PSCs on the progression of fibrosis in CP/PC. To this end, the expression of desmin, α-SMA, galectin-1, fibronectin and collagen type I in normal pancreatic, CP and PC tissues, as well as quiescent/activated PSCs, was investigated...
January 9, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29328483/mir%C3%A2-98%C3%A2-5p-promotes-osteoblast-differentiation-in-mc3t3%C3%A2-e1-cells-by-targeting-ckip%C3%A2-1
#11
Qiliang Liu, Yong Guo, Yang Wang, Xianqiong Zou, Zhixiong Yan
Casein kinase 2-interacting protein 1 (CKIP-1) is a negative regulator for bone formation. Previously, using bioinformatics analysis, CKIP‑1 has been predicted to serve the role of target gene of miR‑98‑5p. In the present study, the potential role of miR‑98‑5p in regulating osteoblast differentiation through CKIP‑1 was investigated. Following pre‑treatment with microRNA (miR)‑98‑5p agomir or miR‑98‑5p antagomir, MC3T3‑E1 cells were cultured in an osteoinductive medium. Subsequently, the expression of miR‑98‑5p, CKIP‑1 and levels of osteoblast differentiation markers, including alkaline phosphatase, matrix mineralization, osteocaicin, collagen type I, runt‑related transcription factor 2 and osteopontin were assayed...
January 9, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29328472/combined-analysis-of-gene-expression-and-genome-binding-profiles-identified-potential-therapeutic-targets-of-ciclopirox-in-ewing-sarcoma
#12
Baisheng Yuan, Wei Ji, Haipeng Xia, Jianmin Li
Ciclopirox (CPX) is a synthetic antifungal drug that is mainly used to treat dermatomycoses. The aim of the present study was to determine whether CPX could influence Ewing sarcoma progression. The present study suggested that CPX treatment may inhibit Ewing sarcoma (ES) progression through Ewing sarcoma breakpoint region 1‑Friend leukemia integration 1 (EWS‑FLI1), a common fusion transcript structure in patients with ES. To determine the underlying mechanisms of ES progression, cross analysis was conducted on three high‑throughput genome or transcript me datasets from the Gene Expression Omnibus...
January 10, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29325275/-qualitative-pathological-assessment-of-liver-fibrosis-regression-after-antiviral-therapy-in-patients-with-chronic-hepatitis-b
#13
Y M Sun, J L Zhou, L Wang, X N Wu, Y P Chen, H X Piao, L G Lu, W Jiang, Y Q Xu, B Feng, Y M Nan, W Xie, G F Chen, H W Zheng, H Li, H G Ding, H Liu, F D Lyu, C Shao, T L Wang, X J Ou, B Q Wang, S Y Chen, H You, J D Jia
Objective: To investigate the methods for qualitative pathological assessment of dynamic changes in liver fibrosis/cirrhosis after antiviral therapy in patients with chronic hepatitis B (CHB), since antiviral therapy can partially reverse liver fibrosis and cirrhosis caused by hepatitis B and semi-quantitative, rather than qualitative, pathological assessment is often used for the research on liver fibrosis regression. Methods: Previously untreated CHB patients with liver fibrosis and cirrhosis were enrolled, and liver biopsy was performed before treatment and at 78 weeks after the antiviral therapy based on entecavir...
November 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/29323029/environmental-cues-determine-the-fate-of-astrocytes-after-spinal-cord-injury
#14
REVIEW
Fatima M Nathan, Shuxin Li
Reactive astrogliosis occurs after central nervous system (CNS) injuries whereby resident astrocytes form rapid responses along a graded continuum. Following CNS lesions, naïve astrocytes are converted into reactive astrocytes and eventually into scar-forming astrocytes that block axon regeneration and neural repair. It has been known for decades that scarring development and its related extracellular matrix molecules interfere with regeneration of injured axons after CNS injury, but the cellular and molecular mechanisms for controlling astrocytic scar formation and maintenance are not well known...
December 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29322373/epac-is-required-for-exogenous-and-endogenous-stimulation-of-adenosine-a2b-receptor-for-inhibition-of-angiotensin-ii-induced-collagen-synthesis-and-myofibroblast-differentiation
#15
Sarawuth Phosri, Kwanchai Bunrukchai, Warisara Parichatikanond, Vilasinee H Sato, Supachoke Mangmool
Angiotensin II (Ang II) plays an important role on the pathogenesis of cardiac fibrosis. Prolong and overstimulation of angiotensin II type 1 receptor with Ang II-induced collagen synthesis and myofibroblast differentiation in cardiac fibroblasts, leading to cardiac fibrosis. Although adenosine and its analogues are known to have cardioprotective effects, the mechanistic by which adenosine A2 receptors (A2Rs) inhibit Ang II-induced cardiac fibrosis is not clearly understood. In the present study, we examined the effects of exogenous adenosine and endogenous adenosine on Ang II-induced collagen and myofibroblast differentiation determined by α-smooth muscle action (α-SMA) overexpression and their underlying signal transduction...
January 10, 2018: Purinergic Signalling
https://www.readbyqxmd.com/read/29322079/fibroblast-and-keratinocyte-gene-expression-following-exposure-to-extracts-of-neem-plant-azadirachta-indica
#16
Takao Someya, Katsura Sano, Kotaro Hara, Yoshimasa Sagane, Toshihiro Watanabe, R G S Wijesekara
This data article provides gene expression profiles, determined by using real-time PCR, of fibroblasts and keratinocytes treated with 0.01% and 0.001% extracts of neem plant (Azadirachta indica), local name "Kohomba" in Sri Lanka, harvested in Sri Lanka. For fibroblasts, the dataset includes expression profiles for genes encoding hyaluronan synthase 1 (HAS1), hyaluronan synthase 2 (HAS2), hyaluronidase-1 (HYAL1), hyaluronidase-2 (HYAL2), versican, aggrecan, CD44, collagen, type I, alpha 1 (COL1A1), collagen, type III, alpha 1 (COL3A1), collagen, type VII, alpha 1 (COL7A1), matrix metalloproteinase 1 (MMP1), acid ceramidase, basic fibroblast growth factor (bFGF), fibroblast growth factor-7 (FGF7), vascular endothelial growth factor (VEGF), interleukin-1 alpha (IL-1α), cyclooxygenase-2 (cox2), transforming growth factor beta (TGF-β), and aquaporin 3 (AQP3)...
February 2018: Data in Brief
https://www.readbyqxmd.com/read/29320615/an-intervertebral-disc-whole-organ-culture-system-to-investigate-proinflammatory-and-degenerative-disc-disease-condition
#17
Gernot Lang, Yishan Liu, Janna Geries, Zhiyu Zhou, David Kubosch, Norbert Südkamp, R Geoff Richards, Mauro Alini, Sibylle Grad, Zhen Li
OBJECTIVE: The aim of this study was to compare the effect of different disease initiators of degenerative disc disease (DDD) within an intervertebral disc (IVD) organ culture system, and to understand the interplay between inflammation and degeneration in the early stage of DDD. DESIGN: Bovine caudal IVDs were cultured within a bioreactor for up to 11 days. Control group was cultured under physiological loading (0.02-0.2 MPa; 0.2 Hz; 2h/day) and high glucose (4...
January 10, 2018: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29318851/-effect-of-combined-intervention-of-electroacupuncture-and-astragaloside-iv-on-myocardial-hypertrophy-and-tgf-%C3%AE-1-smad-signaling-in-rats-with-myocardial-fibrosis
#18
Jia-Shen Li, Xiao-Yu Zhu, Mei-Li Lu, Jun-Hong Gao, Hong-Xin Wang, Xiao-Chun Yu
OBJECTIVE: To observe the effect of combined intervention of electroacupuncture (EA) and astragaloside IV(ASIV) on cardiac hypertrophy and transforming growth factor β 1 (TGF-β 1)/Smad signaling in isoproterenol (ISO) induced cardiac hypertrophy rats, so as to investigate its underlying mechanisms in improving myocardial fibrosis. METHODS: A total of 50 SD rats were randomly divided into 5 groups: normal control, model (ISO), Propranolol (PRO),ASIV and EA+ASIV groups (n=10 in each group)...
December 25, 2017: Zhen Ci Yan Jiu, Acupuncture Research
https://www.readbyqxmd.com/read/29318649/treatment-related-changes-in-bone-turnover-and-fracture-risk-reduction-in-clinical-trials-of-anti-resorptive-drugs-a-meta-regression
#19
Douglas C Bauer, Dennis M Black, Mary L Bouxsein, Li-Yung Lui, Jane A Cauley, Anne E de Papp, Andreas Grauer, Sundeep Khosla, Charles E McCulloch, Richard Eastell
Few pooled analyses of antiresorptive (AR) treatment trials relate short-term changes in bone turnover markers (BTMs) to subsequent fracture reduction. Such information would be useful to assess new ARs or novel dosing regimens. In the Foundation for the National Institutes of Health (FNIH) Bone Quality project, we analyzed individual-level data from 28,000 participants enrolled in 11 bisphosphonate (BP) and three selective estrogen receptor modulator (SERM) placebo-controlled fracture endpoint trials. Using BTM results for two bone formation markers (bone-specific alkaline phosphatase [bone ALP] and pro-collagen I N-propeptide [PINP]) and two bone resorption markers (N-terminal and C-terminal telopeptide of type I collagen) and incident fracture outcome data, we performed a meta-regression relating the mean net effect of treatment on change in bone turnover (active minus placebo % difference after 3 to 12 months) to the log of study-wide fracture risk reduction, and used linear regression to plot the best fitting line...
January 10, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29317799/intra-articular-collagenase-injection-increases-range-of-motion-in-a-rat-knee-flexion-contracture-model
#20
Kayleigh Wong, Guy Trudel, Odette Laneuville
Objectives: A knee joint contracture, a loss in passive range of motion (ROM), can be caused by prolonged immobility. In a rat knee immobilization flexion contracture model, the posterior capsule was shown to contribute to an irreversible limitation in ROM, and collagen pathways were identified as differentially expressed over the development of a contracture. Collagenases purified from Clostridium histolyticum are currently prescribed to treat Dupuytren's and Peyronie's contractures due to their ability to degrade collagen...
2018: Drug Design, Development and Therapy
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