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https://www.readbyqxmd.com/read/29346426/proliferation-and-survival-of-human-amniotic-epithelial-cells-during-their-hepatic-differentiation
#1
Julieta L Maymó, Rodrigo Riedel, Antonio Pérez-Pérez, Marta Magatti, Bernardo Maskin, José Luis Dueñas, Ornella Parolini, Víctor Sánchez-Margalet, Cecilia L Varone
Stem cells derived from placental tissues are an attractive source of cells for regenerative medicine. Amniotic epithelial cells isolated from human amnion (hAECs) have desirable and competitive characteristics that make them stand out between other stem cells. They have the ability to differentiate toward all three germ layers, they are not tumorigenic and they have immunosuppressive properties. Although liver transplantation is the best way to treat acute and chronic hepatic failure patients, there are several obstacles...
2018: PloS One
https://www.readbyqxmd.com/read/29330408/collagen-type-1-accelerates-healing-of-ruptured-fetal-membranes
#2
Haruta Mogami, Annavarapu Hari Kishore, R Ann Word
Preterm premature rupture of membranes (pPROM) is a major cause of preterm birth. Recently, extracellular matrix-directed treatment is applied for wound healing. Here, we used a pregnant mouse model to test the efficacy of collagen type 1 gel for healing of the prematurely ruptured fetal membranes. Although injection of PBS into the ruptured fetal membranes resulted in 40% closure, injection of collagen type 1 improved closure rates to 90% within 72 h. Macrophages of the M2 wound healing phenotype were entrapped in the collagen layer...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29316210/fate-of-egg-proteins-during-the-development-of-columba-livia-domestica-embryo
#3
Seba Jamal Shbailat, Ibtisam Omar Aslan
The transfer of egg white into the yolk and consumption of yolk proteins by the embryo are largely unexplored in the pigeon Columba livia domestica. Here, we investigated the route of egg white transfer as well as the degradation and uptake of yolk proteins by the pigeon embryo. Initially, we tested the electrophoretic patterns of proteins in different egg compartments throughout development. Then, we used lysozyme as a reference protein to follow the egg white transfer, and we measured its activity using Micrococcus lysodeikticus as a substrate...
January 3, 2018: Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution
https://www.readbyqxmd.com/read/29305674/comparable-osteogenic-capacity-of-mesenchymal-stem-or-stromal-cells-derived-from-human-amnion-membrane-and-bone-marrow
#4
Mehran Ghasemzadeh, Ehteramolsadat Hosseini, Mohammadhossein Ahmadi, Maedeh Kamalizad, Naser Amirizadeh
So far, substantial attentions have been attracted to the application of mesenchymal stem or stromal cells (MSCs) in different therapeutic approaches. Although human bone marrow is commonly considered as a major source for MSCs, having an invasive collection method, ethical consideration and donor availability create a challenge for scientists, leading them to explore better alternative sources for MSCs. The study presented here aimed to characterize and compare osteogenic capacity of MSCs obtained from the amnion membrane (AM) with those originated from BM...
January 5, 2018: Cytotechnology
https://www.readbyqxmd.com/read/29297621/amnion-epithelial-cell-derived-exosomes-restrict-lung-injury-and-enhance-endogenous-lung-repair
#5
Jean L Tan, Sin N Lau, Bryan Leaw, Hong P T Nguyen, Lois A Salamonsen, Mohamed I Saad, Siow T Chan, Dandan Zhu, Mirja Krause, Carla Kim, William Sievert, Euan M Wallace, Rebecca Lim
Idiopathic pulmonary fibrosis (IPF) is characterized by chronic inflammation, severe scarring, and stem cell senescence. Stem cell-based therapies modulate inflammatory and fibrogenic pathways by release of soluble factors. Stem cell-derived extracellular vesicles should be explored as a potential therapy for IPF. Human amnion epithelial cell-derived exosomes (hAEC Exo) were isolated and compared against human lung fibroblasts exosomes. hAEC Exo were assessed as a potential therapy for lung fibrosis. Exosomes were isolated and evaluated for their protein and miRNA cargo...
January 3, 2018: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/29277272/classics-revisited-miguel-fern%C3%A3-ndez-on-germ-layer-inversion-and-specific-polyembryony-in-armadillos
#6
REVIEW
A M Carter
BACKGROUND: Miguel Fernández was an Argentinian zoologist who published the first account of obligate polyembryony in armadillos. His contribution is here discussed in relation to his contemporaries, Newman and Patterson, and more recent work. FINDINGS: Fernandez worked on the mulita (Dasypus hybridus). He was able to get early stages before twinning occurred and show it was preceded by inversion of the germ layers. By the primitive streak stage there were separate embryonic shields and partition of the amnion...
January 2018: Placenta
https://www.readbyqxmd.com/read/29259720/cell-transfer-technology-for-tissue-engineering
#7
REVIEW
Keiko Akazawa, Kengo Iwasaki, Mizuki Nagata, Naoki Yokoyama, Hirohito Ayame, Kazumasa Yamaki, Yuichi Tanaka, Izumi Honda, Chikako Morioka, Tsuyoshi Kimura, Motohiro Komaki, Akio Kishida, Yuichi Izumi, Ikuo Morita
We recently developed novel cell transplantation method "cell transfer technology" utilizing photolithography. Using this method, we can transfer ex vivo expanded cells onto scaffold material in desired patterns, like printing of pictures and letters on a paper. We have investigated the possibility of this novel method for cell-based therapy using several disease models. We first transferred endothelial cells in capillary-like patterns on amnion. The transplantation of the endothelial cell-transferred amnion enhanced the reperfusion in mouse ischemic limb model...
2017: Inflammation and Regeneration
https://www.readbyqxmd.com/read/29258619/effects-of-low-intensity-pulsed-ultrasound-lipus-pretreated-human-amnion-derived-mesenchymal-stem-cell-had-msc-transplantation-on-primary-ovarian-insufficiency-in-rats
#8
Li Ling, Xiushan Feng, Tianqin Wei, Yan Wang, Yaping Wang, Wenqian Zhang, Lianli He, Ziling Wang, Qianru Zeng, Zhengai Xiong
BACKGROUND: Human amnion-derived mesenchymal stem cells (hAD-MSCs) have the features of mesenchymal stem cells (MSCs). Low-intensity pulsed ultrasound (LIPUS) can promote the expression of various growth factors and anti-inflammatory molecules that are necessary to keep the follicle growing and to reduce granulosa cell (GC) apoptosis in the ovary. This study aims to explore the effects of LIPUS-pretreated hAD-MSC transplantation on chemotherapy-induced primary ovarian insufficiency (POI) in rats...
December 19, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29245303/viable-placental-allograft-as-a-biological-dressing-in-the-clinical-management-of-full-thickness-thermal-occupational-burns-two-case-reports
#9
Eric L Johnson, Elisabet K Tassis, Georgina M Michael, Susan G Whittinghill
RATIONALE: Occupational burn injuries can be detrimental and difficult to manage. The majority of complex cases are referred and managed at regional burn centers where access to specialized care is available. As an alternative to hospitalization with staged surgical procedures, placental products may be used for outpatient medical management of these common burn injuries, especially if access to a regional burn center is limited or restricted.Fresh amnion has been a treatment of choice in burns for more than 100 years...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29239404/amnion-chorion-grafts-and-their-applications-in-urology
#10
EDITORIAL
Jason Akerman, Jason R Kovac
No abstract text is available yet for this article.
November 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/29238669/use-of-amnion-chorion-and-umbilical-cord-grafts-in-conjunction-with-penile-implant-procedures
#11
Andrew C Kramer
Biologics have increased in popularity lately as a novel and exciting new therapy for men with a spectrum of sexual dysfunction ailments-ranging from erectile dysfunction, Peyronie's disease, and ejaculatory disorders. In this series, sequential patients were analyzed who received biologic materials at the time of their penile implant surgery, with various metrics assessed. The information gathered includes recovery time, need for postoperative analgesics, and satisfaction with the final outcome. In this study, early metrics appear to point to improved outcomes in select criteria...
November 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/29208979/induction-of-antimicrobial-peptides-secretion-by-il-1%C3%AE-enhances-human%C3%A2-amniotic-membrane-for-regenerative-medicine
#12
Fatemeh A Tehrani, Khashayar Modaresifar, Sara Azizian, Hassan Niknejad
Due to antibacterial characteristic, amnion has been frequently used in different clinical situations. Developing an in vitro method to augment endogenous antibacterial ingredient of amniotic epithelial and mesenchymal stem cells is desirable for a higher efficacy of this promising biomaterial. In this study, epithelial or mesenchymal side dependent effect of amniotic membrane (AM) on antibacterial activity against some laboratory and clinical isolated strains was investigated by modified disk diffusion method and colony count assay...
December 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29207015/human-amniotic-epithelial-cells-regulate-osteoblast-differentiation-through-the-secretion-of-tgf%C3%AE-1-and-microrna-34a-5p
#13
Guiling Wang, Feng Zhao, Di Yang, Jing Wang, Lihong Qiu, Xining Pang
Since the beginning of the use of stem cells in tissue regenerative medicine, there has been a search for optimal sources of stem cells. Human amniotic epithelial cells (hAECs) are derived from human amnions, which are typically discarded as medical waste, but were recently found to include cells with trilineage differentiation potential in vitro. Previous study has focused on the osteogenic differentiation ability of hAECs as seed cells in bone regeneration; however, their paracrine effects on osteoblasts (OBs) are yet to be elucidated...
November 17, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29205089/altered-bioenergetic-profile-in-umbilical-cord-and-amniotic-mesenchymal-stem-cells-from-newborns-of-obese-women
#14
Laura Iaffaldano, Carmela Nardelli, Francesca D'Alessio, Valeria D'Argenio, Marcella Nunziato, Lucia Mauriello, Claudio Procaccini, Giuseppe Maria Maruotti, Pasquale Martinelli, Giuseppe Matarese, Lucio Pastore, Luigi Del Vecchio, Giuseppe Labruna, Lucia Sacchetti
Nutritional imbalance and metabolic alterations associated with maternal obesity during pregnancy predispose offspring to obesity and/or to type 2 diabetes, but the mechanisms underlying these effects are still obscure. In this context, we evaluated whether the two main energy-producing pathways (glycolysis and mitochondrial oxidative phosphorylation) are impaired in obesity during pregnancy thus contributing to metabolic intrauterine alterations. Specifically, we studied metabolic abnormalities in the intrauterine life of newborns using stem cells isolated from amnion and umbilical cord (hA- and hUC-MSCs)...
January 3, 2018: Stem Cells and Development
https://www.readbyqxmd.com/read/29204836/fetal-membranes-derived-stem-cells-microenvironment
#15
Phelipe Oliveira Favaron, Maria Angelica Miglino
Recently, the regenerative medicine has been trying to congregate different areas such as tissue engineering and cellular therapy, in order to offer effective treatments to overcome several human and veterinary medical problems. In this regard, fetal membranes have been proposed as a powerful source for obtainment of multipotent stem cells with low immunogenicity, anti-inflammatory properties and nontumorigenicity properties for the treatment of several diseases, including replacing cells lost due to tissue injuries or degenerative diseases...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29196996/inflammatory-and-immune-system-markers
#16
Kelly J McKelvey, Gaayathri Ariyakumar, Sharon A McCracken
Since preeclampsia was first described by Hippocrates in 400 BC, the theory of its causation has shifted from toxins to a current theory that incorporates both vascular and immunological causation. Poor placentation whether it is genetically predisposed or due to low expression of defective HLA-G on fetal trophoblasts is believed to be the initial insult. Oxidative stress from placental ischemia/hypoxia leads to an overload of trophoblast debris by stimulating apoptosis or necrosis. Partial failure of the maternal immune system to tolerate the paternal alloantigens activates maternal immune cells to secrete cytokines whose pleiotropic functions lead to dysfunction of the maternal vascular and placental endothelium, blood coagulation, and fibrinolytic system...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29193446/a-distinct-mechanism-of-senescence-activation-in-amnion-epithelial-cells-by-infection-inflammation-and-oxidative-stress
#17
Christopher Luke Dixon, Lauren Richardson, Samantha Sheller-Miller, George Saade, Ramkumar Menon
PROBLEM: We investigated p38MAPK activation-induced fetal membrane cell senescence in response to inflammation (tumour necrosis factor-alpha [TNF-α]) and infection (lipopolysaccharide [LPS]), factors associated with spontaneous preterm birth. METHOD OF STUDY: Primary amnion epithelial cells (AECs) were exposed to TNF-α, 50 ng/mL and LPS, 100 ng/mL. Cigarette smoke extract (CSE), a known OS inducer, was used as positive control. AECs were cotreated with the antioxidant N-acetyl cysteine (NAC) and p38MAPK inhibitor SB203580 to determine the effect of OS and p38MAPK...
November 30, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/29191827/proteasome-mediated-degradation-of-collagen-iii-by-cortisol-in-amnion-fibroblasts
#18
Yabing Mi, Wangsheng Wang, Jiangwen Lu, Chuyue Zhang, Yawei Wang, Hao Ying, Kang Sun
Rupture of fetal membranes (ROM) can initiate parturition at both term and preterm. Collagen III in the compact layer of the amnion contributes to the tensile strength of fetal membranes. However, the upstream signals triggering collagen III degradation remain mostly elusive. In this study we investigated the role of cortisol regenerated by 11β-hydroxysteroid dehydrogenase 1 (11β-HSD1) in collagen III degradation in human amnion fibroblasts with an aim to seek novel targets for the prevention of preterm premature ROM (PPROM)-elicited preterm birth...
November 30, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29191629/effects-of-thc-on-human-amniotic-epithelial-cell-proliferation-and-migration
#19
J L Yao, Q Z He, M Liu, X W Chang, J T Wu, T Duan, K Wang
BACKGROUND: The deleterious effects of cannabis consumption for fertility and pregnancy outcome are recognized for years. The main psychoactive molecule of cannabis, Δ(9)-tetrahydrocannabinol (THC) is able to cross the placenta barrier and cause alterations in fetal growth, low birth weight and preterm labor. However, the effects of THC on the human placenta amnion are still unknown. METHODS: The distributions of CB1R and CB2R in human amnion tissues were observed by immunohistochemistry (IHC)...
November 27, 2017: Toxicology
https://www.readbyqxmd.com/read/29191510/transplantation-of-human-amnion-prevents-recurring-adhesions-and-ameliorates-fibrosis-in-a-rat-model-of-sciatic-nerve-scarring
#20
Angela Lemke, James Ferguson, Kelly Gross, Carina Penzenstadler, Monika Bradl, Rupert Laurenz Mayer, Christopher Gerner, Heinz Redl, Susanne Wolbank
Peripheral nerve fibrosis and painful adhesions are common, recurring pathological sequelae following injury. In this study, vital human amnion (hAM), an increasingly interesting biomaterial for regenerative medicine, was investigated as a novel therapy. hAM was first analyzed in vitro regarding its anti-adhesive characteristics. Then, the reflected region of hAM which was identified as more suitable, was transplanted into female Sprague Dawley rats with recurring sciatic nerve scarring (n = 24) and compared with untreated controls (n = 30) at one, four and twelve weeks...
November 27, 2017: Acta Biomaterialia
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