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Pietro Presicce, Chan-Wook Park, Paranthaman Senthamaraikannan, Sandip Bhattacharyya, Courtney Jackson, Fansheng Kong, Cesar M Rueda, Emily DeFranco, Lisa A Miller, David A Hildeman, Nathan Salomonis, Claire A Chougnet, Alan H Jobe, Suhas G Kallapur
Neutrophil infiltration of the chorioamnion-decidua tissue at the maternal-fetal interface (chorioamnionitis) is a leading cause of prematurity, fetal inflammation, and perinatal mortality. We induced chorioamnionitis in preterm rhesus macaques by intraamniotic injection of LPS. Here, we show that, during chorioamnionitis, the amnion upregulated phospho-IRAK1-expressed neutrophil chemoattractants CXCL8 and CSF3 in an IL-1-dependent manner. IL-1R blockade decreased chorio-decidua neutrophil accumulation, neutrophil activation, and IL-6 and prostaglandin E2 concentrations in the amniotic fluid...
March 22, 2018: JCI Insight
Asmita Banerjee, Andrea Lindenmair, Simone Hennerbichler, Philipp Steindorf, Ralf Steinborn, Andrey V Kozlov, Heinz Redl, Susanne Wolbank, Adelheid Weidinger
Over a century ago, clinicians started to use the human amniotic membrane for coverage of wounds and burn injuries. To date, literally thousands of different clinical applications exist for this biomaterial almost exclusively in a decellularized or denuded form. Recent reconsiderations for the use of vital human amniotic membrane for clinical applications would take advantage of the versatile cells of embryonic origin including the entirety of their cell organelles. Recently, more and more evidence was found, showing mitochondria to be involved in most fundamental cellular processes, such as differentiation and cell death...
January 2018: Cell Transplantation
Mohamed Abdelwahab, Nehal Salahuddin, Mohamed Gaber, Maie Mousa
Norfloxacin (NOR), a well-known antibacterial agent is also known to have potential antitumor activity. In this study, NOR was immobilized into poly(3-hydroxybutyrate/polyethylene glycol‑nickel oxide (PHB/PEG-NiO) nanocomposites using different NiO contents. The NiO nanoparticles were prepared by sol-gel method and the nanocomposites were prepared by solution cast films. Physicochemical features of nanocomposites were monitored by XRD, FTIR, SEM, TEM and TGA. PHB/PEG-5%NiO nanocomposites showed high NOR loading efficiency (60%) and a long-sustained release in comparison with other carriers...
March 13, 2018: International Journal of Biological Macromolecules
Juan Jose Fraire-Zamora, Johannes Jaeger, Jérôme Solon
Evolution of morphogenesis is generally associated with changes in genetic regulation. Here, we report evidence indicating that dorsal closure, a conserved morphogenetic process in dipterans, evolved as the consequence of rearrangements in epithelial organization rather than signaling regulation. In Drosophila melanogaster , dorsal closure consists of a two-tissue system where the contraction of extraembryonic amnioserosa and a JNK/Dpp-dependent epidermal actomyosin cable result in microtubule-dependent seaming of the epidermis...
March 14, 2018: ELife
Gary Hin-Fai Yam, Ericia Pei-Wen Teo, Melina Setiawan, Matthew J Lovatt, Nur Zahirah Binte M Yusoff, Matthias Fuest, Bee-Tin Goh, Jodhbir S Mehta
Corneal opacities are a leading cause of global blindness. They are conventionally treated by the transplantation of donor corneal tissue, which is, restricted by a worldwide donor material shortage and allograft rejection. Autologous adult stem cells with a potential to differentiate into corneal stromal keratocytes (CSKs) could offer a suitable choice of cells for regenerative cell therapy. Postnatal periodontal ligament (PDL) contains a population of adult stem cells, which has a similar embryological origin as CSK, that is cranial neural crest...
March 13, 2018: Journal of Cellular and Molecular Medicine
Jessica Smith, Marjorie C Treadwell, Deborah R Berman
Twins represent 1%-2% of all pregnancies, yet continue to account for a disproportionate share of neonatal adverse events including neonatal intensive care admission, morbidity, and mortality. Ultrasonography is central to the proper diagnosis of the type of twinning. Ideally, ultrasonography is performed before 14 weeks of gestation to determine chorionicity and amnionicity. Correct identification of the chorionicity in a twin pregnancy facilitates proper counseling and management of the gestation, including ultrasonography follow-up...
March 13, 2018: International Journal of Gynaecology and Obstetrics
Yanfei Deng, Guiting Huang, Lingxiu Zou, Tianying Nong, Xiaoling Yang, Jiayu Cui, Yingming Wei, Sufang Yang, Deshun Shi
Amniotic mesenchymal stem cells (AMSCs) from livestock are valuable resources for animal reproduction and veterinary therapeutic. The purpose of this study is to explore a suitable way to isolate and culture the buffalo AMSCs (bAMSCs), and to identify their biological characteristics. Digestion with a combination of trypsin-EDTA and collagenase type I could obtain pure bAMSCs more effectively than trypsin-EDTA or collagenase type I alone. bAMSCs could proliferate steadily in vitro culture and exhibited fibroblastic-like morphology in vortex-shaped colony...
March 8, 2018: Journal of Veterinary Medical Science
Jeevitaa Kshersagar, Ravi Kshirsagar, Shashikant Desai, Raghvendra Bohara, Meghnad Joshi
Direct application of amnion has greater risk of immunological rejection and infection. Decellularization is an effective method to lower the risk of immune complications and infections. The bioreactor assembly with multiple cassettes was designed for decellurization of multiple amnions with different cell types simultaneously in single run. A detergent-based protocol was modified to remove all cellular components from amnion and diminish the DNA content to render it non-immunogenic. Amnion (n = 10) were treated with 2% sodium dodecyl sulphate (SDS), 5% dimethyl sulfoxide (DMSO) and 2% sodium deoxycholeate (SD)...
March 5, 2018: Cell and Tissue Banking
C Randall Harrell, Valentin Djonov, Crissy Fellabaum, Vladislav Volarevic
The standard sterilization method for most medical devices over the past 40 years involves gamma irradiation. During sterilization, gamma rays efficiently eliminate microorganisms from the medical devices and tissue allografts, but also significantly change molecular structure of irradiated products, particularly fragile biologics such as cytokines, chemokines and growth factors. Accordingly, gamma radiation significantly alters biomechanical properties of bone, tendon, tracheal, skin, amnion tissue grafts and micronized amniotic membrane injectable products...
2018: International Journal of Medical Sciences
L L Yu, T Gao, M M Zhao, P A Lv, L Zhang, J L Li, Y Jiang, F Gao, G H Zhou
In ovo feeding (IOF) of l-arginine (Arg) can affect growth performance of broilers, but the response of IOF of Arg on breast muscle growth is unclear, and the mechanism involved in protein deposition remains unknown. Hense, this experiment was conducted to evaluate the effects of IOF of Arg on breast muscle growth and protein-deposited signalling in post-hatch broilers. A total of 720 fertile eggs were collected from 34-week-old Arbor Acres breeder hens and distributed to three treatments: (1) non-injected control group; (2) 7...
February 26, 2018: Animal: An International Journal of Animal Bioscience
Mariela Giacchino, Pablo I F Inserra, Fernando D Lange, María C Gariboldi, Sergio R Ferraris, Alfredo D Vitullo
The South American hystricognathe Lagostomus maximus is a fossorial rodent whose females show unique reproductive characteristics. They have a 155-day long gestation, show massive polyovulation and a selective process of embryonic resorption in the first half of gestation. In order to explore and perform an in-situ characterization of the reproductive tract, we visualized internal structures through ultrasonography and video-endoscopy in pregnant and non-pregnant females. We describe the finding of protruding structures that lie on the yolk sac and their histological and ultrastructural characterization...
February 21, 2018: Journal of Molecular Histology
Jing Lu, Yvonne Kwun Yue Cheng, Yuen Ha Ting, Kwok Ming Law, Tak Yeung Leung
Accurate diagnosis of chorioamnionicity in multiple pregnancies is the key to appropriate clinical management of multiple gestation. Although prenatal ultrasound assessment of chorioamnionicity is well established and highly accurate if performed in early pregnancy, exceptions and artifacts arise from anatomic variations in multiple pregnancies and unusual sonographic features do exist. We have summarized our own experiences and reports from the literature on these pitfalls as follows: (1) Discordant fetal sex in monochorionic pregnancies due to sex chromosome abnormalities, genital malformation in one fetus, or dizygotic twins forming a monochorionic placenta; (2) Separate placental masses in monochorionic pregnancies due to bipartite placenta; (3) False negative and false positive λ sign can arise for various reasons, and in partial monochorionic / dichorionic placentas both T and λ sign may co-exist; (4) Intrauterine synechia appearing as a thick and echogenic intrauterine septum may lead to erroneous diagnosis of dichorionic twins; (5) Errors in ascertaining amnionicity by the visualization of thin inter-twin amniotic membranes and the number of yolk sacs...
February 17, 2018: American Journal of Obstetrics and Gynecology
Yuli Wang, Xichen Chen, Ying Yin, Song Li
Mesenchymal stem cells (MSCs) have shown great potential in treating bone deficiency. Human adipose-derived stem cells (HASCs) are multipotent progenitor cells with multi-lineage differentiation potential. Human amnion-derived mesenchymal stem cells (HAMSCs) are capable of promoting osteogenic differentiation of MSCs. In this study, we investigated the effect of HAMSCs on HASCs by a transwell co-culture system. HAMSCs promoted proliferation, osteogenic differentiation, angiogenic potential and adiponectin (APN) secretion of HASCs...
February 12, 2018: BMB Reports
Ashraf Sadat Mousavi, Neda Hashemi, Maryam Kashanian, Narges Sheikhansari, Arash Bordbar, Shayesteh Parashi
The study was performed on pregnant women with a gestational age of 26-32 weeks of pregnancy, who had been admitted to the hospital with a confirmed diagnosis of premature rupture of membranes. In all eligible women, ultrasounds were performed for the evaluation of amniotic fluid index. Then, the women were divided into two groups according to amniotic fluid index of ≥5 cm and <5 cm. These women were followed and monitored up to delivery. The women of the two groups did not have significant difference between them according to age, gestational age at the time of ruptured membrane, body mass index, gravidity, parity, gestational age at delivery and route of delivery...
February 9, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
D O Nicholas Sousa, D O Rahil Dharia, D O Shilpin Mehta, D O Keith Marshall, D O David Siegel
Leak following laparoscopic sleeve gastrectomy is one of the most feared complications and its management can be difficult and frustrating for patients and physicians involved. Using multimodality approach and having variable options to plan management for patients presenting with leak following bariatric surgery can be advantageous for physicians. The use of endoscopic injection of EpiFix-dehydrated Human Amnion/Chorion Membrane (dHACM) allograft can be a novel adjunct in facilitating healing of the leak site by iatrogenic introduction of tissue growth factors, cytokines and building connective tissue matrix...
September 2017: Journal of Surgical Case Reports
André Oliveira Paggiaro, Andriws Garcia Menezes, Alexandra Donizetti Ferrassi, Viviane Fernandes De Carvalho, Rolf Gemperli
OBJECTIVE: The amniotic membrane has biological properties that are beneficial to the wound healing process of diabetic foot ulcers (DFU). Our aim is to analyse the scientific evidence found in literature on the use of the amniotic membrane to stimulate DFU healing. METHOD: A systematic review of amniotic membrane's influence was undertaken, using the search terms 'placenta' 'diabetic foot' 'amnion' and biological dressing', assessing the outcomes 'wound healing' and 'wound healing time', in DFU...
February 1, 2018: Journal of Wound Care
Volodymyr Ryzhuk, Xu-Xin Zeng, Xijun Wang, Veniamin Melnychuk, Lee Lankford, Diana Farmer, Aijun Wang
No abstract text is available yet for this article.
April 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Kamal Seyed-Forootan, Hamid Karimi, Nazilla-Sadat Seyed-Forootan
BACKGROUND: Plastic surgeons have used several methods for the construction of neo-vaginas, including the utilization of penile skin, free skin grafts, small bowel or recto-sigmoid grafts, an amnion graft, and cultured cells. PURPOSE: The aim of this study is to compare the results of amnion grafts with amnion seeded with autograft fibroblasts. MATERIALS AND METHODS: Over 8 years, we compared the results of 24 male-to-female transsexual patients retrospectively based on their complications and levels of satisfaction...
January 30, 2018: Aesthetic Plastic Surgery
Megan A Evans, Rebecca Lim, Hyun Ah Kim, Hannah X Chu, Chantelle V Gardiner-Mann, Kimberly W E Taylor, Christopher T Chan, Vanessa H Brait, Seyoung Lee, Quynh Nhu Dinh, Antony Vinh, Thanh G Phan, Velandai K Srikanth, Henry Ma, Thiruma V Arumugam, David Y Fann, Luting Poh, Cameron P J Hunt, Colin W Pouton, John M Haynes, Stavros Selemidis, William Kwan, Leon Teo, James A Bourne, Silke Neumann, Sarah Young, Emma K Gowing, Grant R Drummond, Andrew N Clarkson, Euan M Wallace, Christopher G Sobey, Brad R S Broughton
BACKGROUND AND PURPOSE: Human amnion epithelial cells (hAECs) are nonimmunogenic, nontumorigenic, anti-inflammatory cells normally discarded with placental tissue. We reasoned that their profile of biological features, wide availability, and the lack of ethical barriers to their use could make these cells useful as a therapy in ischemic stroke. METHODS: We tested the efficacy of acute (1.5 hours) or delayed (1-3 days) poststroke intravenous injection of hAECs in 4 established animal models of cerebral ischemia...
March 2018: Stroke; a Journal of Cerebral Circulation
Hiroaki Moroi, Tomomi Kotani, Rika Miki, Hiroyuki Tsuda, Masako Mizuno, Yumiko Ito, Takafumi Ushida, Kenji Imai, Tomoko Nakano, Hua Li, Seiji Sumigama, Eiko Yamamoto, Akira Iwase, Fumitaka Kikkawa
Spontaneous preterm birth is often caused by chorioamnionitis. Toll-like receptors (TLRs) have a role in the response of the innate immune system. The role of TLR5 in chorioamnionitis remains unclear: however, TLR5 was reported to have a significantly stronger effect on the induction of interleukin (IL)-6 when compared with other TLRs in amniotic epithelial cells. The aim of this study was to investigate TLR5 expression in placentas with preterm histologic chorioamnionitis (HCA). The expression levels of TLR5 were evaluated in the amnions, chorions, deciduae and villi with and without HCA using immunohistochemistry...
January 2018: Journal of Clinical Biochemistry and Nutrition
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