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https://www.readbyqxmd.com/read/28335186/ex-vivo-tissues-engineering-modeling-for-reconstructive-surgery-using-human-adult-adipose-stem-cells-and-polymeric-nanostructured-matrix
#1
Francesco Morena, Chiara Argentati, Eleonora Calzoni, Marino Cordellini, Carla Emiliani, Francesco D'Angelo, Sabata Martino
The major challenge for stem cell translation regenerative medicine is the regeneration of damaged tissues by creating biological substitutes capable of recapitulating the missing function in the recipient host. Therefore, the current paradigm of tissue engineering strategies is the combination of a selected stem cell type, based on their capability to differentiate toward committed cell lineages, and a biomaterial, that, due to own characteristics (e.g., chemical, electric, mechanical property, nano-topography, and nanostructured molecular components), could serve as active scaffold to generate a bio-hybrid tissue/organ...
March 31, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28330988/cell-size-distribution-in-epithelial-tissue-formation-and-homeostasis
#2
Alberto Puliafito, Luca Primo, Antonio Celani
How cell growth and proliferation are orchestrated in living tissues to achieve a given biological function is a central problem in biology. During development, tissue regeneration and homeostasis, cell proliferation must be coordinated by spatial cues in order for cells to attain the correct size and shape. Biological tissues also feature a notable homogeneity of cell size, which, in specific cases, represents a physiological need. Here, we study the temporal evolution of the cell-size distribution by applying the theory of kinetic fragmentation to tissue development and homeostasis...
March 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28330124/somaclonal-variations-and-their-applications-in-horticultural-crops-improvement
#3
REVIEW
Hare Krishna, Mahdi Alizadeh, Dhurendra Singh, Udayvir Singh, Nitesh Chauhan, Maliheh Eftekhari, Radha Kishan Sadh
The advancements made in tissue culture techniques has made it possible to regenerate various horticultural species in vitro as micropropagation protocols for commercial scale multiplication are available for a wide range of crops. Clonal propagation and preservation of elite genotypes, selected for their superior characteristics, require high degree of genetic uniformity amongst the regenerated plants. However, plant tissue culture may generate genetic variability, i.e., somaclonal variations as a result of gene mutation or changes in epigenetic marks...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28329517/purple-patches-in-an-immunocompromised-patient-a-report-of-secondary-disseminated-cutaneous-mucormycosis-in-a-man-with-chronic-lymphocytic-leukemia
#4
Sanjana Iyengar, Cindy J Chambers, Jillian W Millsop, Maxwell A Fung, Victoria R Sharon
A 60-year-old man with chronic lymphocytic leukemiadeveloped a deeply violaceous annular patchwith a halo of erythema on the right thigh duringhospitalization for neutropenic fever. Associatedsymptoms included chronic cough and fatigue.Bilateral lung opacities with hilar lymphadenopathywere noted on chest computed tomographyscan. Punch biopsy and tissue culture confirmeda diagnosis of secondary disseminated cutaneousmucormycosis. Although rare, physicians shouldinclude mucormycosis in the differential diagnosisof purpuric patches in immunosuppressed patients...
March 15, 2017: Dermatology Online Journal
https://www.readbyqxmd.com/read/28327460/comprehensive-proteomic-characterization-of-stem-cell-derived-extracellular-matrices
#5
Héloïse Ragelle, Alexandra Naba, Benjamin L Larson, Fangheng Zhou, Miralem Prijić, Charles A Whittaker, Amanda Del Rosario, Robert Langer, Richard O Hynes, Daniel G Anderson
In the stem-cell niche, the extracellular matrix (ECM) serves as a structural support that additionally provides stem cells with signals that contribute to the regulation of stem-cell function, via reciprocal interactions between cells and components of the ECM. Recently, cell-derived ECMs have emerged as in vitro cell culture substrates to better recapitulate the native stem-cell microenvironment outside the body. Significant changes in cell number, morphology and function have been observed when mesenchymal stem cells (MSC) were cultured on ECM substrates as compared to standard tissue-culture polystyrene (TCPS)...
March 7, 2017: Biomaterials
https://www.readbyqxmd.com/read/28326314/case-study-of-somaclonal-variation-in-resistance-genes-mlo-and-pme3-in-flaxseed-linum-usitatissimum-l-induced-by-nanoparticles
#6
Inese Kokina, Ilona Mickeviča, Marija Jermaļonoka, Linda Bankovska, Vjačeslavs Gerbreders, Andrejs Ogurcovs, Inese Jahundoviča
Nanoparticles influence on genome is investigated worldwide. The appearance of somaclonal variation is a cause of great concern for any micropropagation system. Somaclonal variation describes the tissue-culture-induced phenotypic and genotypic variations. This paper shows the results of somaclonal variation in two resistance genes pectin methylesterase and Mlo-like protein in all tissue culture development stages, as donor plant, calluses, and regenerants of Linum usitatissimum induced by gold and silver nanoparticles...
2017: International Journal of Genomics
https://www.readbyqxmd.com/read/28322169/potential-therapeutic-strategies-of-regenerative-medicine-for-renal-failure
#7
Monica Maribel Mata-Miranda, Raul Jacobo Delgado-Macuil, Marlon Rojas-Lopez, Ricardo Martinez-Flores, Gustavo Jesus Vazquez-Zapien
Kidney diseases are a public health problem worldwide; the mortality rate is between 50 and 80%. Available therapies include replacement function by dialysis or transplant, associated with a high morbidity and mortality; kidney transplantation is limited by the shortage of donor organs, immune rejection and lifelong treatment with immunosuppressive. Likewise, none of these treatments compensates all kidney functions. There is a great concern in developing more effective therapies with the ability to replace the wide range of renal functions, so that, new researches on developing therapeutic strategies have focused on regenerative medicine, science that includes artificial creation of tissues and organs, in order to repair or replace a tissue or organ function...
March 17, 2017: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28321490/c-reactive-protein-may-misdiagnose-prosthetic-joint-infections-particularly-chronic-and-low-grade-infections
#8
Daniel Pérez-Prieto, María E Portillo, Lluís Puig-Verdié, Albert Alier, Santos Martínez, Lluisa Sorlí, Juan P Horcajada, Joan C Monllau
BACKGROUND: Periprosthetic tissue cultures, sonication and synovial fluid cultures remain the gold standard for prosthetic joint infection (PJI) diagnosis. However, some 15-20% culture-negative PJI are still reported. Therefore, there is the need for other diagnostic criteria. One point of concern relative to the different definitions of PJI is as to the inclusion of the c-reactive protein (CRP) and the erythrocyte sedimentation rate (ESR) as diagnostic criteria for PJI despite them being non-specific inflammatory blood tests...
March 21, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28321212/microbiological-characteristics-and-clinical-features-of-cardiac-implantable-electronic-device-infections-at-a-tertiary-hospital-in-china
#9
Ruobing Wang, Xuebin Li, Qi Wang, Yawei Zhang, Hui Wang
The incidence of cardiac implantable electronic device (CIED) infections is rapidly increasing worldwide. However, the microbiological characteristics and clinical features of symptomatic CIED infections are not well described. The present study included patients with CIED infections in China, and their pocket tissues were collected for clinical microbiological determination. A total of 219 patients with CIED infections were investigated; of these patients, 145 (66.2%) were positive for CIED infection in pocket tissue cultures and 24 (11...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28315148/a-case-of-cardiac-tamponade-due-to-an-isolated-abscess-in-the-ascending-aorta-of-a-pregnant-woman-with-a-history-of-intravenous-substance-abuse
#10
Brandy Shattuck, John Livingstone
We describe the case of a 23-year-old white female, 10-12 weeks pregnant, with a history of intravenous drug use and a recently diagnosed pneumonia, who was found deceased in her bed after a night of sleep. Although postmortem serum toxicology tested positive for alprazolam, tetrahydrocannabinol, and morphine, the ultimate cause of death was determined to be cardiac tamponade secondary to an isolated abscess in the ascending aorta. The patient had several risk factors for aortic rupture and cardiac tamponade including intravenous drug use, pneumonia, and pregnancy...
March 17, 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28301634/biodynamic-imaging-for-phenotypic-profiling-of-three-dimensional-tissue-culture
#11
Hao Sun, Daniel Merrill, Ran An, John Turek, Daniela Matei, David D Nolte
No abstract text is available yet for this article.
January 1, 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28301258/maldi-mass-spectrometry-reveals-that-cumulus-cells-modulate-the-lipid-profile-of-in-vitro-matured-bovine-oocytes
#12
Alessandra A Vireque, Alessandra Tata, Katia Roberta A Belaz, João Gabriel V Grázia, Fábio N Santos, Daniel R Arnold, Andrea C Basso, Marcos N Eberlin, Marcos Felipe Silva-de-Sá, Rui A Ferriani, Ana Carolina J Sá Rosa-E-Silva
The influence of cumulus cells (CC) on the lipid profile of bovine oocytes matured in two different lipid sources was investigated. Cumulus-oocyte complexes (COC) or denuded oocytes (DO) were matured in tissue culture medium (TCM) supplemented with fetal bovine serum (FBS) or serum substitute supplement (SSS). Lipid profiles of TCM, serum supplements, immature CC and oocyte (IO), and in vitro-matured oocytes from COC and DO were then analyzed by matrix assisted laser desorption ionization mass spectrometry (MALDI-MS) and submitted to partial least squares-discriminant analysis (PLS-DA)...
April 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/28300526/effects-of-bone-morphogenetic-protein-4-bmp4-on-in-vitro-development-and-survival-of-bovine-preantral-follicles-enclosed-in-fragments-ovarian-tissue
#13
Ellen de Vasconcelos da Cunha, Glaucinete Borges de Souza, José Renato de Sousa Passos, Anderson Weiny Barbalho Silva, Andressa Minussi Dau, Márcia Viviane Alves Saraiva, Raimundo Nonato Braga Lobo, José Roberto Viana Silva
The aim of this study was to evaluate the effects of different concentrations of BMP4 on activation, development and mRNA expression of GDF9, BMP15, PCNA, Bax and Bcl2 in cultured bovine follicles enclosed in ovarian tissues. Ovarian tissue fragments were cultured for 6 days in α-MEM+ alone or supplemented with different concentrations of BMP4 (10, 50 or 100 ng/ml). Classical histology was performed to analyze follicle growth and morphology, while real-time PCR was used to analyze mRNA levels in fresh and cultured tissues...
March 16, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28299216/successful-treatment-of-necrotizing-fasciitis-and-streptococcal-toxic-shock-syndrome-with-the-addition-of-linezolid
#14
Hana Rac, Karine D Bojikian, Jose Lucar, Katie E Barber
Necrotizing fasciitis is a deep-seated subcutaneous tissue infection that is commonly associated with streptococcal toxic shock syndrome (TSS). Surgical debridement plus penicillin and clindamycin are the current standard of care. We report a case of necrotizing fasciitis and streptococcal TSS where linezolid was added after a failure to improve with standard therapy. Briefly after isolation of Streptococcus pyogenes from tissue cultures, the patient underwent two surgical debridement procedures and was changed to standard of care therapy...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28298177/tympanic-membrane-organ-culture-using-cell-culture-well-inserts-engrafted-with-tympanic-membrane-tissue-explants
#15
Lawrence J Liew, Richard M Day, Rodney J Dilley
Tissue engineering approaches using growth factors and various materials for repairing chronic perforations of the tympanic membrane are being developed, but there are surprisingly few relevant tissue culture models available to test new treatments. Here, we present a simple three-dimensional model system based on micro-dissecting the rat tympanic membrane umbo and grafting it into the membrane of a cell culture well insert. Cell outgrowth from the graft produced sufficient cells to populate a membrane of similar surface area to the human tympanic membrane within 2 weeks...
March 1, 2017: BioTechniques
https://www.readbyqxmd.com/read/28297584/improvement-of-in-vitro-three-dimensional-cartilage-regeneration-by-a-novel-hydrostatic-pressure-bioreactor
#16
Jie Chen, Zhaoyuan Yuan, Yu Liu, Rui Zheng, Yao Dai, Ran Tao, Huitang Xia, Hairong Liu, Zhiyong Zhang, Wenjie Zhang, Wei Liu, Yilin Cao, Guangdong Zhou
In vitro three-dimensional (3D) cartilage regeneration is a promising strategy for repair of cartilage defects. However, inferior mechanical strength and tissue homogeneity greatly restricted its clinical translation. Simulation of mechanical stress through a bioreactor is an important approach for improving in vitro cartilage regeneration. The current study developed a hydrostatic pressure (HP) bioreactor based on a novel pressure-transmitting mode achieved by slight deformation of a flexible membrane in a completely sealed stainless steel device...
March 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28295953/three-dimensional-carbon-nanotube-scaffolds-for-long-term-maintenance-and-expansion-of-human-mesenchymal-stem-cells
#17
Gaurav Lalwani, Michael D'Agati, Anu Gopalan, Sunny C Patel, Yahfi Talukdar, Balaji Sitharaman
Expansion of mesenchymal stem cells (MSCs) and maintenance of their self-renewal capacity in vitro requires specialized robust cell culture systems. Conventional approaches using animal derived or artificial matrices and a cocktail of growth factors have limitations such as consistency, scalability, pathogenicity and loss of MSC phenotype. Herein, we report the use of all-carbon 3D single- and multiwalled carbon nanotube scaffolds (SWCNTs and MWCNTs) as artificial matrices for long-term maintenance and expansion of human MSCs...
March 10, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28295235/cutaneous-manifestations-of-subcutaneous-and-systemic-fungal-infections-in-tropical-regions-a-retrospective-study-from-a-referral-center-in-southern-taiwan
#18
Wen-Chien Tsai, Chih-Hung Lee, Wei-Min Wu, Shang-Hung Lin, Yi-Chien Yang, Yu-Wen Cheng, Ji-Chen Ho, Kwei-Lan Liu
BACKGROUND: Deep cutaneous fungal infections, including subcutaneous mycoses and systemic fungal infection with cutaneous involvement, cause significant morbidity and mortality in light of increasing immunocompromised patients and global warming. Although a few studies reviewed deep fungal infections in temperate regions, a relevant study in tropical regions is lacking. We evaluated features of deep cutaneous fungal infections in southern Taiwan among the tropical regions. METHODS: We retrospectively reviewed all histopathological specimens with deep cutaneous fungal infections in a single referral center from 2001 to 2014 and successfully identified 23 cases...
March 13, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/28294335/a-novel-scale-down-cell-culture-and-imaging-design-for-the-mechanistic-insight-of-cell-colonisation-within-porous-substrate
#19
C M Gabbott, Z X Zhou, G X Han, T Sun
At the core of translational challenges in tissue engineering is the mechanistic understanding of the underpinning biological processes and the complex relationships among components at different levels, which is a challenging task due to the limitations of current tissue culture and assessment methodologies. Therefore, we proposed a novel scale-down strategy to deconstruct complex biomatrices into elementary building blocks, which were resembled by thin modular substrate and then evaluated separately in miniaturised bioreactors using various conventional microscopes...
March 15, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28293985/immortalized-sheep-microglial-cells-are-permissive-to-a-diverse-range-of-ruminant-viruses
#20
James B Stanton, Beryl Swanson, Edith Orozco, Juan F Muñoz-Gutiérrez, James F Evermann, Julia F Ridpath
BACKGROUND: Ruminants, including sheep and goats (small ruminants), are key agricultural animals in many parts of the world. Infectious diseases, including many viral diseases, are significant problems to efficient production of ruminants. Unfortunately, reagents tailored to viruses of ruminants, and especially small ruminants, are lacking compared to other animals more typically used for biomedical research. OBJECTIVE: The purpose of this study was to determine the permissibility of a stably immortalized, sheep microglial cell line to viruses that are reported to infect ruminants: bovine viral diarrhea virus (BVDV), bovine herpesvirus 1 (BoHV-1), small ruminant lentiviruses (SRLV), and bovine respiratory syncytial virus (BRSV)...
December 2017: Veterinary Quarterly
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