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Cells, Tissues, Organs

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https://www.readbyqxmd.com/read/29131080/complete-static-repopulation-of-decellularized-porcine-tissues-for-heart-valve-engineering-an-in-vitro-study
#1
Annelies Roosens, Mahtab Asadian, Nathalie De Geyter, Pamela Somers, Ria Cornelissen
To date, a completely in vitro repopulated tissue-engineered heart valve has not been developed. This study focused on sequentially seeding 2 cell populations onto porcine decellularized heart valve leaflets (HVL) and pericardia (PER) to obtain fully repopulated tissues. For repopulation of the interstitium, porcine valvular interstitial cells (VIC) and bone marrow-derived mesenchymal stem cells (BM-MSC) or adipose tissue-derived stem cells (ADSC) were used. In parallel, the culture medium was supplemented with ascorbic acid 2-phosphate (AA) and its effect on recolonization was investigated...
November 8, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/29130968/immunohistochemical-localization-of-calbindin-d28k-parvalbumin-and-calretinin-in-the-superior-olivary-complex-of-circling-mice
#2
Jin-Koo Lee, Dhiraj Maskey, Myeung Ju Kim
The circling mouse serves as a hearing loss model. It has spontaneous tmie gene mutations that cause hair cell and cochlear degeneration. However, little is known about the role of the tmie gene in superior olivary complex (SOC) regions, in which sound information from the two ears is integrated and primarily relayed to the nuclei of the lateral lemniscus and inferior colliculus. Several studies have reported that abnormal calcium (Ca2+) homeostasis is associated with the pathology of hearing loss. This study investigated the distribution of Ca2+-binding proteins (CaBPs), such as calbindin D28k, parvalbumin, and calretinin, in the SOC of the circling mouse on postnatal day 16...
November 4, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/29130964/changes-in-the-proliferation-apoptosis-balance-in-the-bovine-ovary-a-key-early-event-in-follicular-persistence
#3
E Matías Belotti, Antonela F Stassi, Melisa M L Velázquez, Pablo U Díaz, Belkis E Marelli, Florencia Rey, Ulises S Notaro, Hugo H Ortega, Natalia R Salvetti
The objective of this work was to evaluate proliferation and apoptosis in the bovine ovary in a model of follicular persistence induced by low levels of progesterone to detect incipient changes during cystic ovarian disease development on the expected day of ovulation (day 0) and after 5, 10, and 15 days of follicular persistence. We analyzed cell proliferation by evaluating the expression of Ki-67 and apoptosis by evaluating caspase-3, BAX, and BCL2 expression. Proliferation was similar in the granulosa and theca cells of antral follicles in the P0 group (treated with progesterone up to the expected day of ovulation) and in the control group...
November 3, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/29055948/avian-collagen-is-useful-for-the-construction-of-skin-equivalents
#4
Hailan Li, Hye-Young Yun, Kwang Jin Baek, Nyoun Soo Kwon, Hye-Ryung Choi, Kyoung-Chan Park, Dong-Seok Kim
As a result of restrictions on animal experimentation, improved skin equivalents (SEs) are needed as alternative test models. This work investigated the effects of avian collagen on the construction of SEs, and to the best of our knowledge is the first study to do so. Hematoxylin and eosin and immunohistochemical staining were used to analyze the SEs. In models containing avian collagen as a dermal equivalent (DE) ingredient, fibroblast proliferation increased by about 60% relative to the control model. Immunohistochemical staining showed that the expression of proliferating cell nuclear antigen (PCNA) and p63 increased in the avian collagen models, while the expression of involucrin, integrin α6, and integrin β1 remained unchanged...
October 21, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28972948/a-novel-method-to-induce-cartilage-regeneration-with-cubic-microcartilage
#5
Hitoshi Nishiwaki, Mitsugu Fujita, Makoto Yamauchi, Noritaka Isogai, Yasuhiko Tabata, Hirohisa Kusuhara
Cartilage tissue is characterized by its poor regenerative properties, and the clinical performance of cartilage grafts to replace cartilage defects has been unsatisfactory. Recently, cartilage regeneration with mature chondrocytes and stem cells has been developed and applied in clinical settings. However, there are challenges with the use of mature chondrocytes and stem cells for tissue regeneration, including the high costs associated with the standard stem cell isolation methods and the decreased cell viability due to cell manipulation...
October 4, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28972947/the-peritoneum-health-disease-and-perspectives-regarding-tissue-engineering-and-cell-therapies
#6
Ronaldo J F C do Amaral, Kátia D Arcanjo, Márcia C El-Cheikh, Felipe L de Oliveira
There are several pathologies associated with the peritoneum, such as mesothelioma and peritonitis. Moreover, the peritoneum is widely used in ultrafiltration procedures, i.e., peritoneal dialysis, presenting advantages over hemodialysis. On the other hand, ultrafiltration failure may lead to dialysis-induced fibrosis and hypervolemia. Therefore, the pathophysiological study of this tissue is of extreme biomedical importance. Studies investigating the biology of the cells dwelling in the peritoneum wall provide evidence of their plasticity and progenitor features...
October 4, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28877520/protective-effect-of-ginger-zingiber-officinale-roscoe-extract-against-oxidative-stress-and-mitochondrial-apoptosis-induced-by-interleukin-1%C3%AE-in-cultured-chondrocytes
#7
Azam Hosseinzadeh, Kobra Bahrampour Juybari, Mohammad Javad Fatemi, Tunku Kamarul, Aboulfazl Bagheri, Neda Tekiyehmaroof, Ali Mohammad Sharifi
AIMS: The protective effects of ginger (Zingiber officinale Roscoe) extract on IL-1β-mediated oxidative stress and mitochondrial apoptosis were investigated in C28I2 human chondrocytes. METHODS: The effects of various concentrations of ginger extract on C28I2 human chondrocyte viability were evaluated in order to obtain noncytotoxic concentrations of the drug by methylthiotetrazole assay. The cells were pretreated with 5 and 25 μg/mL ginger extract for 24 h, followed by incubation with IL-1β (10 ng/mL) for 24 h...
September 7, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28858865/prof-dr-med-dr-h-c-michael-frotscher-1947-2017
#8
(no author information available yet)
No abstract text is available yet for this article.
September 1, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28848084/comparison-of-different-sources-of-mesenchymal-stem-cells-palatal-versus-lipoaspirated-adipose-tissue
#9
Sema S Hakki, Gizem Turaç, S Buket Bozkurt, Seyit Ali Kayis, Erdogan E Hakki, Eren Şahin, Cansu Subaşı, Erdal Karaoz
OBJECTIVES: The purpose of this study was to compare the proliferation and differentiation potential of mesenchymal stem cells (MSCs) derived from palatal adipose tissue (PAT) and lipoaspirated adipose tissue (LAT). MATERIALS AND METHODS: PATs were obtained from 2 healthy female patients undergoing surgery for gingival recession, and LATs were obtained from 2 healthy female patients undergoing plastic surgery. LAT- and PAT-derived MSCs were confirmed by flow cytometry using MSC-specific surface markers...
August 26, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28746930/cocultivation-of-mesenchymal-stem-cells-and-endothelial-progenitor-cells-reveals-antiapoptotic-and-proangiogenic-effects
#10
Dominik Steiner, Katrin Köhn, Justus P Beier, Michael Stürzl, Raymund Horch, Andreas Arkudas
Integrating bioartificial tissues into the host vasculature is a prerequisite for tissue engineering applications. Endothelial progenitor cells (EPCs) display a high angiogenic potential and a low donor-site morbidity, making them ideal for tissue engineering applications. In our study we used a murine EPC cell line (T17b) and rat mesenchymal stem cells (MSCs) for cocultivation experiments. MSCs were cocultured with increasing T17b EPC amounts. Furthermore, MSCs in monoculture were treated with conditioned medium (CM) from T17b EPCs and T17b EPCs were treated with CM from MSCs...
July 27, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28697491/trpc1-trpc3-and-trpc4-in-rat-orofacial-structures
#11
Masatoshi Fujita, Tadasu Sato, Takehiro Yajima, Eiji Masaki, Hiroyuki Ichikawa
TRPC (transient receptor potential cation channel subfamily C) members are nonselective monovalent cation channels and control Ca2+ inflow. In this study, immunohistochemistry for TRPC1, TRPC3, and TRPC4 was performed on rat oral and craniofacial structures to elucidate their distribution and function in the peripheries. In the trigeminal ganglion (TG), 56.1, 84.1, and 68.3% of sensory neurons were immunoreactive (IR) for TRPC1, TRPC3, and TRPC4, respectively. A double immunofluorescence method revealed that small to medium-sized TG neurons co-expressed TRPCs and calcitonin gene-related peptide...
July 12, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/29161703/expression-profile-of-notch3-in-mouse-spermatogonia
#12
Ryu Okada, Megumi Fujimagari, Eri Koya, Yoshikazu Hirose, Tomomi Sato, Yukio Nishina
Stable and sustainable spermatogenesis is supported by the strict regulation of self-renewal and differentiation of spermatogonial stem cells (SSC), which are a rare population of undifferentiated spermatogonia. It has been revealed that some signaling factors regulate the self-renewal of SSC; however, the molecular mechanism of SSC maintenance is still not completely understood. Notch signaling is an evolutionarily conserved juxtacrine signaling that plays important roles in the cell fate determination of various tissue stem cells...
January 22, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28972946/recent-advances-in-decellularization-and-recellularization-for-tissue-engineered-liver-grafts
#13
Yujia Wang, Clara T Nicolas, Harvey S Chen, Jeffery J Ross, Silvana B De Lorenzo, Scott L Nyberg
Liver transplantation from deceased or living human donors remains the only proven option for patients with end-stage liver disease. However, the shortage of donor organs is a significant clinical concern that has led to the pursuit of tissue-engineered liver grafts generated from decellularized liver extracellular matrix and functional cells. Investigative efforts on optimizing both liver decellularization and recellularization protocols have been made in recent decades. In the current review, we briefly summarize these advances, including the generation of high-quality liver extracellular matrix scaffolds, evaluation criteria for quality control, modification of matrix for enhanced properties, and reseeding strategies...
2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28854416/new-advanced-biomaterials-for-tissue-and-organ-regeneration-repair
#14
Loredana De Bartolo, Antonella Piscioneri
No abstract text is available yet for this article.
2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28848167/an-effective-cell-coculture-platform-based-on-the-electrospun-microtube-array-membrane-for-nerve-regeneration
#15
V Chia-Hsuan Tseng, Chee Ho Chew, Wan-Ting Huang, Yang-Kao Wang, Ko-Shao Chen, Szu-Yi Chou, Chien-Chung Chen
Recently, a novel substrate known as an electrospun polylactic acid (PLLA) microtube array membrane (MTAM) was successfully developed as a cell coculture platform. Structurally, this substrate is made up of one-to-one connected, ultrathin, submicron scale fibers that are arranged in an arrayed formation. Its unique structure confers several key advantages which are beneficial in a cell coculture system. In this study, the interaction between rat fetal neural stem cells (NSC) and astrocytes was examined by comparing the outcome of a typical Transwell-based coculture system and that of an electrospun PLLA MTAM-based coculture system...
2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28803246/biofunctional-ionic-doped-calcium-phosphates-silk-fibroin-composites-for-bone-tissue-engineering-scaffolding
#16
S Pina, R F Canadas, G Jiménez, M Perán, J A Marchal, R L Reis, J M Oliveira
The treatment and regeneration of bone defects caused by traumatism or diseases have not been completely addressed by current therapies. Lately, advanced tools and technologies have been successfully developed for bone tissue regeneration. Functional scaffolding materials such as biopolymers and bioresorbable fillers have gained particular attention, owing to their ability to promote cell adhesion, proliferation, and extracellular matrix production, which promote new bone growth. Here, we present novel biofunctional scaffolds for bone regeneration composed of silk fibroin (SF) and β-tricalcium phosphate (β-TCP) and incorporating Sr, Zn, and Mn, which were successfully developed using salt-leaching followed by a freeze-drying technique...
2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28803236/enhancement-of-bone-healing-by-local-administration-of-carbon-nanotubes-functionalized-with-sodium-hyaluronate-in-rat-tibiae
#17
Vanessa B Andrade, Marcos A Sá, Renato M Mendes, Paulo A Martins-Júnior, Gerluza A B Silva, Bruna R Sousa, Marcelo V Caliari, Erick S Ávila, Luiz Orlando Ladeira, Rodrigo R Resende, Anderson J Ferreira
It has been reported that carbon nanotubes (CNTs) serve as nucleation sites for the deposition of bone matrix and cell proliferation. Here, we evaluated the effects of multi-walled CNTs (MWCNTs) on bone repair of rat tibiae. Furthermore, because sodium hyaluronate (HY) accelerates bone restoration, we associated CNTs with HY (HY-MWCNTs) in an attempt to boost bone repair. The bone defect was created by a 1.6-mm-diameter drill. After 7 and 14 days, tibiae were processed for histological and morphometric analyses...
2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28787740/neuronal-differentiation-modulated-by-polymeric-membrane-properties
#18
Sabrina Morelli, Antonella Piscioneri, Enrico Drioli, Loredana De Bartolo
In this study, different collagen-blend membranes were successfully constructed by blending collagen with chitosan (CHT) or poly(lactic-co-glycolic acid) (PLGA) to enhance their properties and thus create new biofunctional materials with great potential use for neuronal tissue engineering and regeneration. Collagen blending strongly affected membrane properties in the following ways: (i) it improved the surface hydrophilicity of both pure CHT and PLGA membranes, (ii) it reduced the stiffness of CHT membranes, but (iii) it did not modify the good mechanical properties of PLGA membranes...
2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28787732/tissue-engineering-of-vein-valves-based-on-decellularized-natural-matrices
#19
Alexandru Mogaldea, Tobias Goecke, Karolina Theodoridis, Axel Haverich, Serghei Cebotari, Andres Hilfiker
Valvular repair or transplantation, designed to restore the venous valve function of the legs, has been proposed as treatment in chronic venous insufficiency. Available grafts or surgeries have provided limited durability so far. Generating venous valve substitutes by means of tissue engineering could be a solution. We generated decellularized jugular ovine vein conduits containing valves (oVVC) after reseeding with ovine endothelial cells differentiated from peripheral blood-derived endothelial cells (oPBEC), cultivated in vitro corresponding to the circulatory situation in the lower leg at rest and under exertion...
2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28772272/vascularized-cardiac-spheroids-as-novel-3d-in-vitro-models-to-study-cardiac-fibrosis
#20
Gemma A Figtree, Kristen J Bubb, Owen Tang, Eddy Kizana, Carmine Gentile
Spheroid cultures are among the most explored cellular biomaterials used in cardiovascular research, due to their improved integration of biochemical and physiological features of the heart in a defined architectural three-dimensional microenvironment when compared to monolayer cultures. To further explore the potential use of spheroid cultures for research, we engineered a novel in vitro model of the heart with vascularized cardiac spheroids (VCSs), by coculturing cardiac myocytes, endothelial cells, and fibroblasts isolated from dissociated rat neonatal hearts (aged 1-3 days) in hanging drop cultures...
2017: Cells, Tissues, Organs
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