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Microchimerism

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https://www.readbyqxmd.com/read/29305193/ultra-sensitive-droplet-digital-pcr-for-the-assessment-of-microchimerism-in-cellular-therapies
#1
David Kliman, Gloria Castellano-Gonzalez, Barbara Withers, Janine Street, Elizabeth Tegg, Oksana Mirochnik, Joey Lai, Leighton Clancy, David Gottlieb, Emily Blyth
Current techniques to assess chimerism after hematopoietic stem cell transplantation (HSCT) are limited in both sensitivity and precision. These drawbacks are problematic in the context of cellular therapies which frequently result in microchimerism (donor chimerism <1%). We have developed a highly sensitive droplet digital PCR (ddPCR) assay using commercially available regents with good performance throughout the range of clinically relevant chimerism measurements, including microchimerism. We tested the assay using spiked samples of known donor:recipient ratios and in clinical samples from HSCT recipients and patients enrolled on clinical trials of microtransplantation and 3rd party virus specific T cells (VST)...
January 2, 2018: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29259377/pretransplantation-fetal-maternal-microchimerism-in-pediatric-liver-transplantation-from-mother
#2
Nam-Joon Yi, Min-Su Park, Eun Young Song, Hye Young Ahn, Jeik Byun, Hyeyoung Kim, Suk Kyun Hong, Kyungchul Yoon, Hyo-Sin Kim, Sung-Woo Ahn, Hae Won Lee, YoungRok Choi, Kwang-Woong Lee, Kyung-Suk Suh, Myoung Hee Park
AIM: To investigate the rates of pretransplantation fetal-maternal microchimerism (MC) and its effect on rejection in children receiving maternal liver grafts. METHODS: DNA or blood samples before liver transplantation (LT) were available in 45 pediatric patients and their mothers. The presence of pretransplantation MC to non-inherited maternal antigens (NIMAs) (NIMA-MC) in the peripheral blood was tested using nested PCR-single-strand conformation polymorphism analysis for the human leukocyte antigen (HLA)-DRB1 alleles...
December 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29211403/the-role-of-fetal-maternal-microchimerism-as-a-natural-born-healer-in-integrity-improvement-of-maternal-damaged-kidney
#3
Abdol-Mohammad Kajbafzadeh, Shabnam Sabetkish, Nastaran Sabetkish
PURPOSE: To identify the fetal stem cell (FSC) response to maternal renal injury with emphasis on renal integrity improvement and Y chromosome detection in damaged maternal kidney. MATERIALS AND METHODS: Eight non-green fluorescent protein (GFP) transgenic Sprague- Dawley rats were mated with GFP-positive transgenic male rats. Renal damage was induced on the right kidney at gestational day 11. The same procedure was performed in eight non-pregnant rats as control group...
December 7, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/29197124/breast-milk-cells-trafficking-induces-microchimerism-mediated-immune-system-maturation-in-the-infant
#4
REVIEW
Jean-Pierre Molès, Edouard Tuaillon, Chipepo Kankasa, Anne-Sophie Bedin, Nicolas Nagot, Arnaud Marchant, Joann M McDermid, Philippe Van de Perre
Initiating breastfeeding within the first hour of life confers an important benefit in terms of child mortality and severe morbidity. Intestinal permeability to ingested macromolecules and immunoglobulins is limited to the first days of human life. These exchanges cease in the very early post-partum period but may increase beyond the neonatal period in response to local inflammation or introduction of a weaning food. From animal- and limited human-based observations, compelling evidence points out to breast milk cells also trafficking from mother to infant mucosal tissues and participating to the maternal microchimerism...
December 2, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/29189413/emerging-role-of-exosomes-in-allorecognition-and-allograft-rejection
#5
Bruno Gonzalez-Nolasco, Mengchuan Wang, Aurore Prunevieille, Gilles Benichou
PURPOSE OF REVIEW: This article reviews recent literature on the nature of extracellular vesicles released by allogeneic transplants and examine their role in T-cell alloimmunity involved in rejection and tolerance of these grafts. RECENT FINDINGS: Donor cells release extracellular vesicles, including exosomes, after transplantation of allogeneic organs and tissues. Consequently, recipient APCs take up these exosomes and present donor MHC antigens on their surface (allo-MHC cross-dressing) thus, activating some alloreactive T cells via a mechanism called semi-direct pathway of allorecognition...
November 20, 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/29028900/unravelling-the-biological-secrets-of-microchimerism-by-single-cell-analysis
#6
Anders Ståhlberg, Amin El-Heliebi, Peter Sedlmayr, Thomas Kroneis
The presence of microchimeric cells is known for >100 years and well documented since decades. Earlier, microchimeric cells were mainly used for cell-based non-invasive prenatal diagnostics during early pregnancy. Microchimeric cells are also present beyond delivery and are associated to various autoimmune diseases, tissue repair, cancer and immune tolerance. All these findings were based on low complexity studies and occasionally accompanied by artefacts not allowing the biological functions of microchimerism to be determined...
September 28, 2017: Briefings in Functional Genomics
https://www.readbyqxmd.com/read/29022092/unique-manifestations-of-biliary-atresia-provide-new-immunological-insight-into-its-etiopathogenesis
#7
REVIEW
Toshihiro Muraji, Haruo Ohtani, Satoshi Ieiri
Biliary atresia (BA) is a unique cholestatic disease of newborns with a background of exaggerated immune response in the liver of unknown mechanism. Three hypotheses have been proposed; autoimmune type of cholangiopathy triggered by virus infection, graft-versus-host disease type of immune-mediated disease associated with maternal microchimerism and ductal plate malformation theory. Researchers on virus infection theory have experimentally explored immune process causing cholangiopathy on murine models of this disease, while in maternal microchimerism hypothesis were detected maternal cells in the BA patients' liver, of which roles are yet to be determined...
December 2017: Pediatric Surgery International
https://www.readbyqxmd.com/read/28972207/reply-breastfeeding-related-maternal-microchimerism
#8
Jeremy M Kinder, Ina A Stelzer, Petra C Arck, Sing Sing Way
No abstract text is available yet for this article.
November 2017: Nature Reviews. Immunology
https://www.readbyqxmd.com/read/28972205/breastfeeding-related-maternal-microchimerism
#9
Jean-Pierre Molès, Edouard Tuaillon, Chipepo Kankasa, Anne-Sophie Bedin, Nicolas Nagot, Arnaud Marchant, Joann M McDermid, Philippe Van de Perre
No abstract text is available yet for this article.
November 2017: Nature Reviews. Immunology
https://www.readbyqxmd.com/read/28921714/fetal-microchimerism-in-human-brain-tumors
#10
Lauren Broestl, Joshua B Rubin, Sonika Dahiya
Sex differences in cancer incidence and survival, including central nervous system tumors, are well documented. Multiple mechanisms contribute to sex differences in health and disease. Recently, the presence of fetal-in-maternal microchimeric cells has been shown to have prognostic significance in breast and colorectal cancers. The frequency and potential role of these cells has not been investigated in brain tumors. We therefore selected two common primary adult brain tumors for this purpose: meningioma, which is sex hormone responsive and has a higher incidence in women, and glioblastoma, which is sex hormone independent and occurs more commonly in men...
September 18, 2017: Brain Pathology
https://www.readbyqxmd.com/read/28911790/microchimerism-defining-and-redefining-the-prepregnancy-context-a-review
#11
H S Gammill, W E Harrington
Bidirectional transplacental exchange characterizes human pregnancy. Cells exchanged between mother and fetus can durably persist as microchimerism and may have both short- and long-term consequences for the recipient. The amount, type, and persistence of microchimerism are influenced by obstetric characteristics, pregnancy complications, exposures to infection, and other factors. A reproductive-aged woman enters pregnancy harboring previously acquired microchimeric "grafts," which may influence her preconception health and her subsequent pregnancy outcomes...
August 31, 2017: Placenta
https://www.readbyqxmd.com/read/28911140/parity-and-risk-of-thyroid-autoimmunity-based-on-the-nhanes-2001-2002-2007-2008-2009-2010-and-2011-2012
#12
COMPARATIVE STUDY
Marelle Yehuda, Chia-Hao Wang, Youngju Pak, Ken C Chiu, Andrew G Gianoukakis
Context: Autoimmune thyroid disease is more common in women than in men. Fetal microchimerism has been implicated as a potential explanation for this disparity. Objective: The objective of this study was to evaluate the relationship between parity and thyroid autoimmunity in the US population. Design, Setting, Patients: The National Health and Nutrition Examination Survey was used to identify females with antithyroperoxidase (TPOAb) and antithyroglobulin antibody (TgAb) measurements and parity data...
September 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28910431/hla-mismatched-microtransplant-in-older-patients-newly-diagnosed-with-acute-myeloid-leukemia-results-from-the-microtransplantation-interest-group
#13
Mei Guo, Nelson J Chao, Jian-Yong Li, David A Rizzieri, Qi-Yun Sun, Ann Mohrbacher, Elizabeth F Krakow, Wan-Jun Sun, Xu-Liang Shen, Xin-Rong Zhan, De-Pei Wu, Li Liu, Juan Wang, Min Zhou, Lin-Hua Yang, Yang-Yi Bao, Zheng Dong, Bo Cai, Kai-Xun Hu, Chang-Lin Yu, Jian-Hui Qiao, Hong-Li Zuo, Ya-Jing Huang, Anthony D Sung, Jun-Xiao Qiao, Zhi-Qing Liu, Tie-Qiang Liu, Bo Yao, Hong-Xia Zhao, Si-Xuan Qian, Wei-Wei Liu, Rafael Forés, Rafael F Duarte, Hui-Sheng Ai
Importance: The outcome of older patients with acute myeloid leukemia (AML) remains unsatisfactory. Recent studies have shown that HLA-mismatched microtransplant could improve outcomes in such patients. Objective: To evaluate outcomes in different age groups among older patients with newly diagnosed AML who receive HLA-mismatched microtransplant. Design, Setting, and Participants: This multicenter clinical study included 185 patients with de novo AML at 12 centers in China, the United States, and Spain in the Microtransplantation Interest Group...
September 14, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28837581/fetal-exposure-to-maternal-human-platelet-antigen-1a-does-not-induce-tolerance-an-analytical-observational-study
#14
Mette Kjær, Heidi Tiller, Gøril Heide, Jens Kjeldsen-Kragh, Bjørn Skogen, Anne Husebekk
Fetal and neonatal alloimmune thrombocytopenia (FNAIT) is a disease that may cause severe bleeding complications with risk of perinatal death or lifelong disability. The main cause of FNAIT is maternal antibodies against human platelet antigen (HPA)-1a. Both fetomaternal bleeding and transplacental trafficking of fetal cells during pregnancy could be the cause of alloimmunization. Persistence of fetal cells in the mother (fetal microchimerism) and maternal cells in the child (maternal microchimerism) are well-recognized phenomena...
2017: PloS One
https://www.readbyqxmd.com/read/28645895/multiparity-improves-outcomes-after-cerebral-ischemia-in-female-mice-despite-features-of-increased-metabovascular-risk
#15
Rodney M Ritzel, Anita R Patel, Monica Spychala, Rajkumar Verma, Joshua Crapser, Edward C Koellhoffer, Anna Schrecengost, Evan R Jellison, Liang Zhu, Venugopal Reddy Venna, Louise D McCullough
Females show a varying degree of ischemic sensitivity throughout their lifespan, which is not fully explained by hormonal or genetic factors. Epidemiological data suggest that sex-specific life experiences such as pregnancy increase stroke risk. This work evaluated the role of parity on stroke outcome. Age-matched virgin (i.e., nulliparous) and multiparous mice were subjected to 60 min of reversible middle cerebral artery occlusion and evaluated for infarct volume, behavioral recovery, and inflammation. Using an established mating paradigm, fetal microchimeric cells present in maternal mice were also tracked after parturition and stroke...
July 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28638735/maternal-microchimerism-is-prevalent-in-cord-blood-in-memory-t-cells-and-other-cell-subsets-and-persists-post-transplant
#16
Sami B Kanaan, Hilary S Gammill, Whitney E Harrington, Stephen C De Rosa, Philip A Stevenson, Alexandra M Forsyth, Judy Allen, Emma Cousin, Koen van Besien, Colleen S Delaney, J Lee Nelson
Among reported advantages of umbilical cord blood (CB) in transplantation is lower leukemia relapse probability. Underlying cellular mechanisms of graft-vs.-leukemia (GVL) are thought to include a prominent role for T cells. Cells of the CB's mother, maternal microchimerism (MMc), were recently strongly, but indirectly, implicated in this GVL benefit. We assayed MMc directly and hypothesized benefit accrues from CB maternal T cells. MMc was quantified in 51 CBs and, within memory T, naïve T, B, NK cells, and monocytes in 27 CBs...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28516946/ccl2-ccr2-signalling-recruits-a-distinct-fetal-microchimeric-population-that-rescues-delayed-maternal-wound-healing
#17
Mathieu Castela, Dany Nassar, Maria Sbeih, Marie Jachiet, Zhe Wang, Selim Aractingi
Foetal microchimeric cells (FMCs) traffic into maternal circulation during pregnancy and persist for decades after delivery. Upon maternal injury, FMCs migrate to affected sites where they participate in tissue healing. However, the specific signals regulating the trafficking of FMCs to injury sites had to be identified. Here we report that, in mice, a subset of FMCs implicated in tissue repair displays CD11b(+) CD34(+) CD31(+) phenotype and highly express C-C chemokine receptor 2 (Ccr2). The Ccr2 ligand chemokine ligand 2 (Ccl2) enhances the recruitment of FMCs to maternal wounds where these cells transdifferentiate into endothelial cells and stimulate angiogenesis through Cxcl1 secretion...
May 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28494794/juvenile-idiopathic-arthritis-in-relation-to-perinatal-and-maternal-characteristics-a-case-control-study
#18
Samantha W Bell, Susan Shenoi, J Lee Nelson, Parveen Bhatti, Beth A Mueller
BACKGROUND: Existing data on associations between maternal and early childhood exposures and juvenile idiopathic arthritis (JIA) risk is scant and inconsistent with previous studies showing potential role for prematurity, number of siblings and infections. We explored JIA and International League of Associations for Rheumatology (ILAR) JIA categories in relation to selected infant (birthweight, size-for-gestational-age, gestational age), and maternal (parity, delivery type, prior fetal loss) characteristics that may be markers for exposures related to two pathways (hygiene hypothesis, microchimerism) potentially associated with autoimmune disorder occurrence...
May 11, 2017: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/28480895/immunological-implications-of-pregnancy-induced-microchimerism
#19
REVIEW
Jeremy M Kinder, Ina A Stelzer, Petra C Arck, Sing Sing Way
Immunological identity is traditionally defined by genetically encoded antigens, with equal maternal and paternal contributions as a result of Mendelian inheritance. However, vertically transferred maternal cells also persist in individuals at very low levels throughout postnatal development. Reciprocally, mothers are seeded during pregnancy with genetically foreign fetal cells that persist long after parturition. Recent findings suggest that these microchimeric cells expressing non-inherited, familially relevant antigenic traits are not accidental 'souvenirs' of pregnancy, but are purposefully retained within mothers and their offspring to promote genetic fitness by improving the outcome of future pregnancies...
August 2017: Nature Reviews. Immunology
https://www.readbyqxmd.com/read/28478841/somatic-mutation-a-cause-of-biliary-atresia-a-hypothesis
#20
Alexandre Fabre, Céline Roman, Bertrand Roquelaure
Despite many years of research, the causes of biliary atresia still remain elusive. Infection, immune disorder, toxins or maternal microchimerism have been cited as potential triggers of biliary atresia. This is a rare disease with a stable incidence over the years although with sizeable ethnic variations. This stability suggests that environmental factors have in fact only a slight influence. During the search for etiologies, twin studies have often helped disentangle the genetic from the environmental. For this condition, twin studies have mainly demonstrated a lack of concordance between twins (either monozygotic or dizygotic), ruling out Mendelian, infectious or toxic causes...
May 2017: Medical Hypotheses
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