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Li X, Zhang D, Zhao X, Huang S, Han M, Wang G, Li Y, Kang D, Zhang X, Dai P, Yuan Y. Exploration of a Novel Noninvasive Prenatal Testing Approach for Monogenic Disorders Based on Fetal Nucleated Red Blood Cells. Clin Chem 2023; 69:1396-1408. [PMID: 37963809 DOI: 10.1093/clinchem/hvad165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 09/21/2023] [Indexed: 11/16/2023]
Abstract
BACKGROUND Due to technical issues related to cell-specific capture methods, amplification, and sequencing, noninvasive prenatal testing (NIPT) based on fetal nucleated red blood cells (fNRBCs) has rarely been used for the detection of monogenic disorders. METHODS Maternal peripheral blood was collected from 11 families with hereditary hearing loss. After density gradient centrifugation and cellular immunostaining for multiple biomarkers, candidate individual fetal cells were harvested by micromanipulation and amplified by whole-genome amplification (WGA). Whole-exome sequencing/whole-genome sequencing (WGS) and Sanger sequencing were performed on the identified fNRBCs to determine the fetal genotype. The impact of single-cell and pooled WGA products on the sequencing quality and results was compared. A combined analysis strategy, encompassing whole-exome sequencing/WGS, haplotype analysis, and Sanger sequencing, was used to enhance the NIPT results. RESULTS fNRBCs were harvested and identified in 81.8% (9/11) of families. The results of cell-based-NIPT (cb-NIPT) were consistent with those of invasive prenatal diagnosis in 8 families; the coincidence rate was 88.9% (8/9). The combined analysis strategy improved the success of cb-NIPT. The overall performance of pooled WGA products was better than that of individual cells. Due to a lack of alternative fetal cells or sufficient sequencing data, cb-NIPT failed in 3 families. CONCLUSIONS We developed a novel fNRBC-based NIPT method for monogenic disorders. By combining multiple analysis strategies and multiple fetal cell WGA products, the problem of insufficient genome information in a single cell was remedied. Our method has promising prospects in the field of NIPT for the detection of monogenic disorders.
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Affiliation(s)
- Xiaoge Li
- Department of Otolaryngology, Head and Neck Surgery, Institute of Otolaryngology, Genetic Testing Center for Deafness, Chinese PLA General Hospital, Beijing 100853, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- Key Lab of Hearing Impairment Science of Ministry of Education, Beijing, China
- Key Lab of Hearing Impairment Prevention and Treatment of Beijing, China
| | - Dejun Zhang
- Department of Otolaryngology, Head and Neck Surgery, Institute of Otolaryngology, Genetic Testing Center for Deafness, Chinese PLA General Hospital, Beijing 100853, China
- Key Lab of Hearing Impairment Science of Ministry of Education, Beijing, China
- Key Lab of Hearing Impairment Prevention and Treatment of Beijing, China
- The Second Hospital of Jilin University, Changchun, China
| | - Xing Zhao
- Department of Otolaryngology, Head and Neck Surgery, Institute of Otolaryngology, Genetic Testing Center for Deafness, Chinese PLA General Hospital, Beijing 100853, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- Key Lab of Hearing Impairment Science of Ministry of Education, Beijing, China
- Key Lab of Hearing Impairment Prevention and Treatment of Beijing, China
| | - Shasha Huang
- Department of Otolaryngology, Head and Neck Surgery, Institute of Otolaryngology, Genetic Testing Center for Deafness, Chinese PLA General Hospital, Beijing 100853, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- Key Lab of Hearing Impairment Science of Ministry of Education, Beijing, China
- Key Lab of Hearing Impairment Prevention and Treatment of Beijing, China
| | - Mingyu Han
- Department of Otolaryngology, Head and Neck Surgery, Institute of Otolaryngology, Genetic Testing Center for Deafness, Chinese PLA General Hospital, Beijing 100853, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- Key Lab of Hearing Impairment Science of Ministry of Education, Beijing, China
- Key Lab of Hearing Impairment Prevention and Treatment of Beijing, China
| | - Guojian Wang
- Department of Otolaryngology, Head and Neck Surgery, Institute of Otolaryngology, Genetic Testing Center for Deafness, Chinese PLA General Hospital, Beijing 100853, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- Key Lab of Hearing Impairment Science of Ministry of Education, Beijing, China
- Key Lab of Hearing Impairment Prevention and Treatment of Beijing, China
| | - Yingzhuo Li
- Department of Information, Chinese PLA General Hospital, Beijing, China
| | - Dongyang Kang
- Department of Otolaryngology, Head and Neck Surgery, Institute of Otolaryngology, Genetic Testing Center for Deafness, Chinese PLA General Hospital, Beijing 100853, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- Key Lab of Hearing Impairment Science of Ministry of Education, Beijing, China
- Key Lab of Hearing Impairment Prevention and Treatment of Beijing, China
| | - Xin Zhang
- Department of Otolaryngology, Head and Neck Surgery, Institute of Otolaryngology, Genetic Testing Center for Deafness, Chinese PLA General Hospital, Beijing 100853, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- Key Lab of Hearing Impairment Science of Ministry of Education, Beijing, China
- Key Lab of Hearing Impairment Prevention and Treatment of Beijing, China
| | - Pu Dai
- Department of Otolaryngology, Head and Neck Surgery, Institute of Otolaryngology, Genetic Testing Center for Deafness, Chinese PLA General Hospital, Beijing 100853, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- Key Lab of Hearing Impairment Science of Ministry of Education, Beijing, China
- Key Lab of Hearing Impairment Prevention and Treatment of Beijing, China
| | - Yongyi Yuan
- Department of Otolaryngology, Head and Neck Surgery, Institute of Otolaryngology, Genetic Testing Center for Deafness, Chinese PLA General Hospital, Beijing 100853, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- Key Lab of Hearing Impairment Science of Ministry of Education, Beijing, China
- Key Lab of Hearing Impairment Prevention and Treatment of Beijing, China
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Chen Y, Wu Z, Sutlive J, Wu K, Mao L, Nie J, Zhao XZ, Guo F, Chen Z, Huang Q. Noninvasive prenatal diagnosis targeting fetal nucleated red blood cells. J Nanobiotechnology 2022; 20:546. [PMID: 36585678 PMCID: PMC9805221 DOI: 10.1186/s12951-022-01749-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 12/15/2022] [Indexed: 12/31/2022] Open
Abstract
Noninvasive prenatal diagnosis (NIPD) aims to detect fetal-related genetic disorders before birth by detecting markers in the peripheral blood of pregnant women, holding the potential in reducing the risk of fetal birth defects. Fetal-nucleated red blood cells (fNRBCs) can be used as biomarkers for NIPD, given their remarkable nature of carrying the entire genetic information of the fetus. Here, we review recent advances in NIPD technologies based on the isolation and analysis of fNRBCs. Conventional cell separation methods rely primarily on physical properties and surface antigens of fNRBCs, such as density gradient centrifugation, fluorescence-activated cell sorting, and magnetic-activated cell sorting. Due to the limitations of sensitivity and purity in Conventional methods, separation techniques based on micro-/nanomaterials have been developed as novel methods for isolating and enriching fNRBCs. We also discuss emerging methods based on microfluidic chips and nanostructured substrates for static and dynamic isolation of fNRBCs. Additionally, we introduce the identification techniques of fNRBCs and address the potential clinical diagnostic values of fNRBCs. Finally, we highlight the challenges and the future directions of fNRBCs as treatment guidelines in NIPD.
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Affiliation(s)
- Yanyu Chen
- grid.207374.50000 0001 2189 3846Academy of Medical Sciences, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, 450052 China ,grid.49470.3e0000 0001 2331 6153School of Physics and Technology, Wuhan University, Wuhan, 430072 China
| | - Zhuhao Wu
- grid.411377.70000 0001 0790 959XDepartment of Intelligent Systems Engineering, Indiana University, Bloomington, IN 47405 USA
| | - Joseph Sutlive
- grid.38142.3c000000041936754XDivision of Thoracic and Cardiac Surgery, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115 USA
| | - Ke Wu
- grid.49470.3e0000 0001 2331 6153School of Physics and Technology, Wuhan University, Wuhan, 430072 China
| | - Lu Mao
- grid.207374.50000 0001 2189 3846Academy of Medical Sciences, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, 450052 China
| | - Jiabao Nie
- grid.38142.3c000000041936754XDivision of Thoracic and Cardiac Surgery, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115 USA ,grid.261112.70000 0001 2173 3359Department of Biological Sciences, Northeastern University, Boston, MA 02115 USA
| | - Xing-Zhong Zhao
- grid.49470.3e0000 0001 2331 6153School of Physics and Technology, Wuhan University, Wuhan, 430072 China
| | - Feng Guo
- Department of Intelligent Systems Engineering, Indiana University, Bloomington, IN, 47405, United States.
| | - Zi Chen
- Division of Thoracic and Cardiac Surgery, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, 02115, USA.
| | - Qinqin Huang
- The Research and Application Center of Precision Medicine, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, 450052, China.
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Choe J, Hwang D, Kim KC, Choi YM. Fetal Gender Determination and BclI Polymorphism Using Nucleated Erythrocytes in Maternal Blood. J Histochem Cytochem 2016; 53:323-7. [PMID: 15750011 DOI: 10.1369/jhc.4a6405.2005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This study demonstrated determination of fetal gender from nucleated red blood cells (NRBCs) in maternal blood and attempted to apply prenatal diagnosis of hemophilia A using BclI DNA polymorphism. Venous blood was drawn from 20 pregnant women, and NRBCs were recovered by magnetic activated cell sorting and anti-GPA (glycophorin A) immunostaining. After microdissector isolation of the NRBCs, primer extension preamplification (PEP) and nested PCR of the amelogenin gene were performed to determine fetal gender. We also performed PEP and nested PCR of BclI polymorphism to verify the validity of prenatal diagnosis of hemophilia A. DNA amplification was achieved in 107 cells (51.9%) and fetal gender determined with 65.0% accuracy. Unfortunately, we could not verify the validity within the scope of this study. However, in a larger number of cases that are informative in BclI polymorphism, we will be able to identify patients affected by hemophilia A using fetal NRBCs in maternal blood.
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Affiliation(s)
- Jin Choe
- 1621-7 Hamchoon Women's Clinic, Seocho-1-dong Seocho-ku, Seoul, Korea.
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4
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Della Starza I, De Novi LA, Nunes V, Del Giudice I, Ilari C, Marinelli M, Negulici AD, Vitale A, Chiaretti S, Foà R, Guarini A. Whole-genome amplification for the detection of molecular targets and minimal residual disease monitoring in acute lymphoblastic leukaemia. Br J Haematol 2014; 165:341-8. [DOI: 10.1111/bjh.12744] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Accepted: 12/06/2013] [Indexed: 12/31/2022]
Affiliation(s)
- Irene Della Starza
- Haematology; Department of Cellular Biotechnologies and Haematology; “Sapienza” University; Rome Italy
| | - Lucia Anna De Novi
- Haematology; Department of Cellular Biotechnologies and Haematology; “Sapienza” University; Rome Italy
| | - Vittorio Nunes
- Haematology; Department of Cellular Biotechnologies and Haematology; “Sapienza” University; Rome Italy
| | - Ilaria Del Giudice
- Haematology; Department of Cellular Biotechnologies and Haematology; “Sapienza” University; Rome Italy
| | - Caterina Ilari
- Haematology; Department of Cellular Biotechnologies and Haematology; “Sapienza” University; Rome Italy
| | - Marilisa Marinelli
- Haematology; Department of Cellular Biotechnologies and Haematology; “Sapienza” University; Rome Italy
| | - Alina Delia Negulici
- Haematology; Department of Cellular Biotechnologies and Haematology; “Sapienza” University; Rome Italy
| | - Antonella Vitale
- Haematology; Department of Cellular Biotechnologies and Haematology; “Sapienza” University; Rome Italy
| | - Sabina Chiaretti
- Haematology; Department of Cellular Biotechnologies and Haematology; “Sapienza” University; Rome Italy
| | - Robin Foà
- Haematology; Department of Cellular Biotechnologies and Haematology; “Sapienza” University; Rome Italy
| | - Anna Guarini
- Haematology; Department of Cellular Biotechnologies and Haematology; “Sapienza” University; Rome Italy
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5
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Kolialexi A, Tounta G, Mavrou A. Noninvasive fetal RhD genotyping from maternal blood. Expert Rev Mol Diagn 2014; 10:285-96. [DOI: 10.1586/erm.10.5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Rodríguez de Alba M, Bustamante-Aragonés A, Perlado S, Trujillo-Tiebas MJ, Díaz-Recasens J, Plaza-Arranz J, Ramos C. Noninvasive prenatal diagnosis of monogenic disorders. Expert Opin Biol Ther 2012; 12 Suppl 1:S171-9. [DOI: 10.1517/14712598.2012.674509] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Geifman-Holtzman O, Ober Berman J. Prenatal diagnosis: update on invasive versus noninvasive fetal diagnostic testing from maternal blood. Expert Rev Mol Diagn 2009; 8:727-51. [PMID: 18999924 DOI: 10.1586/14737159.8.6.727] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The modern obstetrics care includes noninvasive prenatal diagnosis testing such as first trimester screening performed between 11 and 14 weeks' gestation and second trimester screening performed between 15 and 20 weeks. In these screening tests, biochemical markers are measured in the maternal blood with or without ultrasound for fetal nuchal translucency with reported accuracy of up to 90%. Invasive procedures, including amniocentesis or chorionic villi sampling, are used to achieve over 99% accuracy. During these procedures direct fetal material is examined and, therefore, these tests are highly accurate with the caveat of a small risk for pregnancy loss. Much research now focuses on other noninvasive highly accurate and risk-free tests that will identify fetal material in the maternal blood. Fetal cells and fetal DNA/RNA provide fetal information but are hard to find in an overwhelming background of maternal cells and in the absence of specific fetal cell markers. The most experience has been accumulated with fetal rhesus and fetal sex determination from maternal blood, with an accuracy of up to 100% by using gene sequences that are absent from maternal blood. Although not clinically applicable yet, fetal cells, fetal DNA/RNA and fetal proteomics in combination with cutting edge technology are described to prenatally diagnose aneuploidies and single-gene disorders.
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Affiliation(s)
- Ossie Geifman-Holtzman
- Division of Reproductive Genetics and Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Temple University School of Medicine, Philadelphia, PA, USA.
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8
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Mohamed H, Turner JN, Caggana M. Biochip for separating fetal cells from maternal circulation. J Chromatogr A 2007; 1162:187-92. [PMID: 17628577 DOI: 10.1016/j.chroma.2007.06.025] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2007] [Revised: 05/30/2007] [Accepted: 06/13/2007] [Indexed: 10/23/2022]
Abstract
Isolation of fetal cells from maternal circulation is the subject of intense research to eliminate the need for currently used invasive prenatal diagnosis procedures. Fetal cells can be isolated using magnetic-activated cell sorting or fluorescence-activated cell sorting, however no technique to specifically isolate and use fetal cells for genetic diagnosis has reached routine clinical practice. This paper demonstrates the use of a micromachined device to separate fetal cells from maternal circulation based on differences in size and deformation characteristics. Nucleated fetal red blood cells range in diameter from 9 to 12 microm can deform and pass through a channel as small as 2.5 microm wide and 5 microm deep. Although the white blood cells range in diameter from 10 to 20 microm, they cannot deform and are retained by the 2.5 microm wide and 5 microm deep channels under our experimental conditions. Fetal cells were isolated from cord blood and DNA analysis confirmed their fetal origin with ruled out maternal contamination.
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Affiliation(s)
- Hisham Mohamed
- Wadsworth Center, New York State Department of Health, Albany, NY 12201-0509, USA.
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9
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Purwosunu Y, Sekizawa A, Farina A, Wibowo N, Okazaki S, Nakamura M, Samura O, Fujito N, Okai T. Cell-free mRNA concentrations of CRH,PLAC1, and selectin-P are increased in the plasma of pregnant women with preeclampsia. Prenat Diagn 2007; 27:772-7. [PMID: 17554801 DOI: 10.1002/pd.1780] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To compare mRNA concentrations of corticotrophin-releasing hormone (CRH), placenta specific-1 (PLAC1), and selectin-P in preeclamptic and normal pregnancies. METHODS Peripheral blood samples were obtained from 43 pregnant women with preeclampsia and 41 control subjects. Plasma was harvested from samples and RNA extracted. Plasma RNA was analyzed using reverse transcription polymerase chain reaction (PCR) assay. Median concentrations of CRH, PLAC1, and selectin-P mRNA in plasma were compared, to assess possible differences in distribution. Data were also stratified and compared according to clinical severity of preeclampsia. Finally, CRH, PLAC1, and selectin-P were plotted against quantitative distributions of blood pressure and proteinuria. RESULTS All markers were differently distributed between cases and controls. Median values in subgroups correlated with severity of preeclampsia. All markers correlated with both. Selectin-P was identified as the marker with the highest degree of correlation. No correlation was found between any markers in the control group and proteinuria or blood pressure. CONCLUSION CRH, PLAC1, and selectin-P are distributed differently in preeclampsia cases compared to controls and correlate with signs of preeclampsia.
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Affiliation(s)
- Yuditiya Purwosunu
- Department of Obstetrics and Gynecology, Showa University School of Medicine, Tokyo, Japan
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10
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Geifman-Holtzman O, Grotegut CA, Gaughan JP. Diagnostic accuracy of noninvasive fetal Rh genotyping from maternal blood--a meta-analysis. Am J Obstet Gynecol 2006; 195:1163-73. [PMID: 17000250 DOI: 10.1016/j.ajog.2006.07.033] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2006] [Revised: 06/02/2006] [Accepted: 07/27/2006] [Indexed: 10/24/2022]
Abstract
OBJECTIVE The purpose of this study was to determine the reported diagnostic accuracy, the validity, and the current limitations of fetal Rh genotyping from peripheral maternal blood based on the existing English-written publications. STUDY DESIGN A search of the English literature describing fetal RhD determination from maternal blood was conducted. From each study, we determined the number of samples tested, fetal RhD genotype, the source of the fetal DNA (maternal plasma, serum, or fetal cells), gestational age, and confirmation of fetal Rh type. The presence of alloimmunization and exclusions of tested samples were noted. For the meta-analysis we calculated composite estimates using 2 random effects models, weighted GLM and Bayesian. Sensitivity, specificity, positive and negative predictive values were calculated. RESULTS We identified 37 English-written publications that included 44 protocols reporting noninvasive Rh genotyping using fetal DNA obtained from maternal blood on a total of 3261 samples. A total of 183 (183/3261, 5.6%) samples were excluded from the meta-analysis. The overall diagnostic accuracy after exclusions was 94.8%. The gestational ages ranged between 8 and 42 weeks gestation. Maternal serum and plasma were found to be the best source for accurate diagnosis of fetal RhD type in 394/410 (96.1%) and 2293/2377 (96.5%), respectively. There were 719/783 (91.8%) alloimmunized patients that were correctly diagnosed. There were 16 studies that reported 100% diagnostic accuracy in their fetal RhD genotyping. CONCLUSION The diagnostic accuracy of noninvasive fetal Rh determination using maternal peripheral blood is 94.8%. Its use can be applicable to Rh prophylaxis and to the management of Rh alloimmunized pregnancies. Improvements of the technique and further study of structure and rearrangements of the RhD gene may improve accuracy of testing and enable large-scale, risk-free fetal RhD genotyping using maternal blood.
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Affiliation(s)
- Ossie Geifman-Holtzman
- Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Temple University School of Medicine, Philadelphia, PA, USA.
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Di Simone N, Lai M, Rumi C, Riccardi P, D'Asta M, Leone G, Mancuso S, Caruso A. Non-Invasive Detection of Fetal Rhesus D Status: A Comparison between Polymerase Chain Reaction and Flow Cytometry. Fetal Diagn Ther 2006; 21:404-9. [PMID: 16912487 DOI: 10.1159/000093880] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2004] [Accepted: 09/05/2005] [Indexed: 11/19/2022]
Abstract
OBJECTIVE A non-invasive prenatal determination of the fetal RhD status might be useful for the management of pregnancies in RhD-negative women whose partners are RhD positive. METHODS Maternal peripheral blood of 32 RhD-negative women (17-24 weeks of gestation) was collected, and circulating fetal cells were enriched by CD71 mini-magnetic activated cell sorting. The RhD status of the fetuses was assessed using multiparametric flow cytometry, and results were compared to those of reverse transcriptase (RT)-polymerase chain reaction (PCR), or PCR, which acted as control. Flow-cytometric study of fetal cells employed monoclonal antibodies directed against CD71, glycophorin A (GPA) and RhD antigens. RESULTS The median percentage of CD71- and RhD-positive cells was 0.83% (range 0.14-6.44%), and that of CD71 and GPA-positive cells was 10.07% (range 0.52-45.84%). Flow-cytometric analysis correlated with RT-PCR results of RNA obtained from whole maternal blood. In 1 case, an incorrect result was due to the failure of the amplification of the specific RhD band on RNA extracted from the CD71-positive fraction. In two instances, we observed false-positive results for RhD in PCR of DNA obtained from maternal plasma. CONCLUSION Based on our results, flow-cytometric analysis might be proposed as a clinical tool for the non-invasive prenatal determination of the fetal RhD status independently of fetal gender.
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Affiliation(s)
- Nicoletta Di Simone
- Department of Obstetrics and Gynecology, Catholic University of the Sacred Heart, Rome, Italy
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12
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Van der Schoot CE, Soussan AA, Koelewijn J, Bonsel G, Paget-Christiaens LGC, de Haas M. Non-invasive antenatal RHD typing. Transfus Clin Biol 2006; 13:53-7. [PMID: 16564727 DOI: 10.1016/j.tracli.2006.02.021] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The existence of cell free fetal DNA, derived from apoptotic syncytiotrophoblast, in the maternal circulation has opened new possibilities of non-invasive prenatal diagnosis. Although still some technical problems exists, especially the lack of a generic positive control on the presence of fetal DNA and the aspecific amplification of background maternal DNA, non-invasive prenatal RHD typing has been successfully introduced in several laboratories, especially in Europe. The diagnostic accuracy reaches>99%. In the Netherlands PCR guided administration of antenatal anti-D prophylaxis is cost-effective and nearby. In this review the main characteristics and applications of cell free fetal DNA are discussed, with an emphasis on prenatal RHD genotyping.
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Affiliation(s)
- C E Van der Schoot
- Department of experimental immunohematology, Sanquin Research, 125, Plesmanlaan, 1066 CX Amsterdam, the Netherlands.
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Hughes S, Arneson N, Done S, Squire J. The use of whole genome amplification in the study of human disease. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2005; 88:173-89. [PMID: 15561304 DOI: 10.1016/j.pbiomolbio.2004.01.007] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The availability of large amounts of genomic DNA is of critical importance for many of the molecular biology assays used in the analysis of human disease. However, since the amount of patient tissue available is often limited and as particular foci of interest may consist of only a few hundred cells, the yield of DNA is often insufficient for extensive analysis. To address this problem, several whole genome amplification (WGA) methodologies have been developed. Initial WGA approaches were based on the polymerase chain reaction (PCR). However, recent reports have described the use of non-PCR-based linear amplification protocols for WGA. Using these methods, it is possible to generate microgram quantities of DNA starting with as little as 1mg of genomic DNA. This review will provide an overview of WGA approaches and summarize some of the uses for amplified DNA in various high-throughput genetic applications.
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Affiliation(s)
- Simon Hughes
- Ontario Cancer Institute, Princess Margaret Hospital, University Health Network, Ontario, Canada.
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Fuks AM, Hsu CD. Prenatal Diagnosis using Fetal Genetic Material in Maternal Circulation. Taiwan J Obstet Gynecol 2005. [DOI: 10.1016/s1028-4559(09)60100-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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Bannai M, Higuchi K, Akesaka T, Furukawa M, Yamaoka M, Sato K, Tokunaga K. Single-nucleotide-polymorphism genotyping for whole-genome-amplified samples using automated fluorescence correlation spectroscopy. Anal Biochem 2004; 327:215-21. [PMID: 15051538 DOI: 10.1016/j.ab.2004.01.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2003] [Indexed: 11/26/2022]
Abstract
Whole-genome amplification (WGA) methods were adopted for single-nucleotide-polymorphism (SNP) typing to minimize the amount of genomic DNA that has to be used in typing for thousands of different SNPs in large-scale studies; 5-10 ng of genomic DNA was amplified by a WGA method (improved primer-extension-preamplification-polymerase chain reaction (I-PEP-PCR), degenerated oligonucleotide primer-PCR (DOP-PCR), or multiple displacement amplification (MDA)). Using 1/100 to 1/500 amounts of the whole-genome-amplified products as templates, subsequent analyses were successfully performed. SNPs were genotyped by the sequence-specific primer (SSP)-PCR method followed by fluorescence correlation spectroscopy (FCS). The typing results were evaluated for four different SNPs on tumor necrosis factor receptor 1 and 2 genes (TNFR1 and TNFR2). The genotypes determined by the SSP-FCS method using the WGA products were 100% in concordance with those determined by nucleotide sequencing using genomic DNAs. We have already carried out typing of more than 300 different SNPs and are currently performing 7,500-10,000 typings per day using WGA samples from patients with several common diseases. WGA coupled with FCS allows specific and high-throughput genotyping of thousands of samples for thousands of different SNPs.
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Affiliation(s)
- Makoto Bannai
- Department of Human Genetics, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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Zou L, Ye X, Xu K, Zhu J. Isolation of fetal nucleated red blood cells from maternal blood. JOURNAL OF TONGJI MEDICAL UNIVERSITY = TONG JI YI KE DA XUE XUE BAO 2003; 20:169-71. [PMID: 12845739 DOI: 10.1007/bf02887064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
To find a simple, effective method of isolating fetal cells from maternal peripheral blood for prenatal diagnosis, 45 women were studied with their gestation being 6-14 weeks and age 21-30 years. The fetal cells were isolated from maternal blood by using discontinuous density gradient centrifugation. Some of the isolated cells were made smear and counted under the microscope; others were used for predicting fetal sex by PCR amplification of Y chromosome specific DYZ1 gene. The major cells in the upper separation interface were lymphocytes and monocytes, with occasionally seen nucleated red blood cells (NRBC); while those in the middle separation interface were neutrocytes, with NRBC scattering. The ratio of NRBC/nucleated cells was 1.98 +/- 0.28 x 10(-5). There was no significant difference between the first and second trimester (P > 0.05). The amount of isolated fetal cells was sufficient for prenatal genetic diagnosis. Male pregnancy was correctly predicted in 10 out of 13 cases. It is concluded that the method of discontinuous density gradient centrifugation was of considerable importance in the development of non-invasive prenatal genetic diagnosis.
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Affiliation(s)
- L Zou
- Department of Obstetrics & Gynecology, Xiehe Hospital, Tongji Medical University, Wuhan 430022
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17
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Abstract
The isolation of human fetal DNA from the maternal circulation has provided a source of fetal material for prenatal diagnosis. The objective of this study was to investigate whether a similar pattern could be observed in the maternal circulation of male-bearing gravid rhesus monkeys. A real-time PCR TaqMan system for the rhesus Y-chromosome sex determining region was used to determine fetal sex and to quantify fetal DNA concentrations. Results in 14 healthy pregnancies indicated that fetal male DNA could be routinely detected in maternal serum by 50 d of gestation (late first trimester; term 165 +/- 10 d). Fetal DNA concentrations increased with advancing gestation, reaching a mean of 341 genome equivalents/mL of serum (range 11-1570 copies/mL) in the last trimester of gestation, similar to findings in humans. The fetal DNA concentration corresponded to 2.7% of the total maternal serum DNA in the third trimester. Similar to findings in humans, male fetal DNA sequences were not detected postpartum (through 4 wk postpartum) or in animals with a previous history of delivering male offspring. These data indicate that fetal male DNA is present in the maternal circulation of gravid rhesus monkeys comparable to findings in humans and further support the use of this nonhuman primate species as a model to investigate fetomaternal cell trafficking and microchimerism.
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Affiliation(s)
- Daniel F Jimenez
- California National Primate Research Center, University of California, Davis, CA 95616-8542, U.S.A
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18
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Abstract
Although fetal cells have been known to escape to the maternal circulation for a number of years, research attempts to use them for prenatal diagnosis have not had any consistent success. This review attempts to trace the history of such attempts and to document their progress and reasons for success or failure. The opinions of recent conferences including that of the US National Institute of Child Health and Human Development, a sponsor of major US research in the field, are reported and discussed. It is concluded that although basic work has demonstrated the biologic availability of both fetal cells and their free DNA representatives in the maternal circulation at gestational ages relevant to prenatal diagnosis, much work remains to develop practical technology for their consistent recovery and assay.
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Affiliation(s)
- Laird Jackson
- Department of Obstetrics and Gynecology, Drexel University College of Medicine, Philadelphia, PA 19102-1192, USA.
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Sekizawa A, Saito H. Prenatal screening of single-gene disorders from maternal blood. AMERICAN JOURNAL OF PHARMACOGENOMICS : GENOMICS-RELATED RESEARCH IN DRUG DEVELOPMENT AND CLINICAL PRACTICE 2002; 1:111-7. [PMID: 12174672 DOI: 10.2165/00129785-200101020-00004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Fetal cells and cell-free fetal DNA can be found circulating in maternal blood. Fetal cells recovered from maternal blood provide the only source of pure fetal DNA for noninvasive prenatal DNA diagnosis. Fetal nucleated erythrocytes (NRBCs) are considered the most suitable maternally-circulating fetal cells for this purpose, because they are not commonly found in the peripheral blood of healthy adults and are most abundant in the fetus during early gestation. Because fetal cells in maternal blood are extremely rare, a definitive separation method has not yet been established. Fetal NRBCs can be enriched from maternal blood via fluorescence- or magnetic-activated cell sorting, density gradients, immuno-magnetic beads or micromanipulation. Fetal cells are identified by Giemsa staining, hybridization with Y-chromosome specific probes, PCR-detection of a specific paternal allele, or immunostaining for fetal cell antigens. Amplification of fetal DNA sequences by primer extension preamplification and PCR has allowed prenatal screening for Duchenne muscular dystrophy and the fetal RhD blood type. Sequence-specific hybridization has been used to detect sickle cell anemia and beta-thalassemia prenatally in heterozygous carriers of these disorders. The use of cell-free fetal DNA in maternal plasma for the diagnosis of single-gene disorders is limited to disorders caused by a paternally inherited gene or a mutation that can be distinguished from the maternally inherited counterpart. At present, fetal gender can be determined from maternal plasma. When a pregnant woman is a heterzygous carrier of an X-linked disorder, the determination of fetal gender is clinically very informative for first-step screening to avoid invasive amniocentesis. The non-invasive prenatal diagnosis of genetic disorders should be applied to pregnant women with a definite risk for a specific single-gene disorder.
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Affiliation(s)
- A Sekizawa
- Department of Obstetrics and Gynecology, Showa University School of Medicine, Tokyo, Japan
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20
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Hahn S, Holzgreve W. Prenatal diagnosis using fetal cells and cell-free fetal DNA in maternal blood: what is currently feasible? Clin Obstet Gynecol 2002; 45:649-56; discussion 730-2. [PMID: 12370604 DOI: 10.1097/00003081-200209000-00008] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Sinuhe Hahn
- Department of Obstetrics and Gynecology, University of Basel, Switzerland.
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21
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Hennerbichler S, Schmied R, Petek E, Kroisel PM, Pertl B, Tiran B, Dohr G, Wintersteiger R, Sedlmayr P. Detection and relocation of cord blood nucleated red blood cells by laser scanning cytometry. CYTOMETRY 2002; 48:87-92. [PMID: 12116369 DOI: 10.1002/cyto.10112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Fetal nucleated red blood cells (NRBC) present in the peripheral blood of pregnant women at low frequency are a potential target for noninvasive prenatal diagnostics. METHODS CD71-enriched cells from male cord blood (CB) were stained for the gamma chain of HbF (Hb-gamma) and cytocentrifuged. Fluorescence in situ hybridization (FISH) was done for the Y chromosome. Following staining of the nucleus with TO-PRO-3, laser scanning cytometry was performed. Artificial mixtures of small volumes of male CB and blood drawn from nonpregnant females were analyzed. RESULTS In CB, 59% of events double positive for Hb-gamma and TO-PRO-3 were identified as CB-NRBC. In contamination studies, male fetal CB-NRBC were identified perfectly on the basis of morphologic characteristics and FISH reactivity following relocation and visual assessment. Mean recovery was 8.7%. CONCLUSIONS Laser scanning cytometry of preenriched fetal NRBC may offer a promising way for noninvasive prenatal diagnostics. This is because it provides a virtual enrichment step and the position on the slides of cells visually confirmed to correspond to fetal NRBC is known. Further experimental procedures on well-defined and located target cells may be feasible.
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Affiliation(s)
- Simone Hennerbichler
- Institute of Histology and Embryology, Karl Franzens University, Harrachgasse 21, A-8010 Graz, Austria
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23
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Abstract
In human pregnancy, multiple lines of evidence have indicated that there is trafficking of nucleated cells and cell-free DNA between the mother and fetus. Diagnostically, fetal cells in maternal blood and fetal DNA in maternal plasma offer a noninvasive source of fetal material for prenatal diagnosis. Through the developments of methods for fetal cell isolation and fetal DNA detection, many fetal genetic characteristics and chromosomal abnormalities have been detected from maternal blood. Large-scale clinical trials have been initiated that will facilitate the eventual application of these technologies. The presence of large quantities of cell-free fetal DNA in maternal plasma challenges the conventional belief that the fetal and maternal circulations are separate entities. In addition, the recent demonstration of the persistence of fetal cells following delivery also opens up a new field of investigation and raises new physiologic and pathogenic implications. Like the Yin and Yang in Chinese mythology, we believe that fetal cells and fetal DNA transfer are closely related and should be studied and applied in a synergistic manner.
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Affiliation(s)
- D W Bianchi
- Department of Pediatrics, Tufts University School of Medicine, Boston, Massachusetts 02111, USA.
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24
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Lo YM. Fetal DNA in maternal plasma: application to non-invasive blood group genotyping of the fetus. Transfus Clin Biol 2001; 8:306-10. [PMID: 11499983 DOI: 10.1016/s1246-7820(01)00118-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The non-invasive determination of fetal genetic characteristics, including blood group types, is a long-sought goal of modern genetics. Previous work on the use of fetal cells in maternal blood has been hampered by the rarity of such cells. The recent discovery of cell-tree fetal DNA in maternal blood has opened up new possibilities for non-invasive prenatal diagnosis. It is particularly useful that fetal DNA is present in relatively high concentrations in maternal plasma, making its robust detection possible using modern technology. Large-scale clinical trials and standardization of protocols still need to be carried out. However, there is optimism that the accurate and safe prenatal determination of fetal blood group types may be achieved in routine clinical practice in the near future.
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Affiliation(s)
- Y M Lo
- Department of Chemical Pathology. The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, SAR.
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25
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Rodríguez de Alba M, Palomino P, González-González C, Lorda-Sanchez I, Ibañez MA, Sanz R, Fernández-Moya JM, Ayuso C, Díaz-Recasens J, Ramos C. Prenatal diagnosis on fetal cells from maternal blood: practical comparative evaluation of the first and second trimesters. Prenat Diagn 2001; 21:165-70. [PMID: 11260601 DOI: 10.1002/1097-0223(200103)21:3<165::aid-pd29>3.0.co;2-f] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Objectives- Several attempts have been made to determine the gestational period in which the maximum number of fetal cells can be found in maternal blood and consequently which is the best week in which to perform a reliable non-invasive prenatal diagnosis. Most studies conclude that the number of nucleated red blood cells (NRBC) increases in line with gestation, but the number of cells that are fetal in origin (FNRBC) decreases in the third trimester. The aim of the present study was to make a practical comparative evaluation of the first and second trimesters to ascertain the period in which a greater number of FNRBC can be found of the total number of NRBC identified. Methods- Double density gradient and a posterior positive selection (CD71) by magnetic activated cell sorting (MACS) were employed. In the final fraction, erythroblasts were identified using Kleihauer staining and were studied using the fluorescence in situ hybridization (FISH) interphasic technique. Results- There was a significant difference (p<0.05) between the mean number of FNRBC found in the first and second trimesters. Conclusions- The number of FNRBC increases from the first to the second trimester. It appears that the optimum week in which to perform a reliable non-invasive prenatal diagnosis is around the 15th week.
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Affiliation(s)
- M Rodríguez de Alba
- Department of Genetics, Fundación Jiménez Díaz, Avda. Reyes Católicos no. 2, Madrid 28040, Spain.
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26
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27
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Hyodo H, Ishikawa Y, Kashiwase K, Ogawa A, Watanabe Y, Tsuneyama H, Toyoda C, Uchikawa M, Akaza T, Fujii T, Kozuma S, Taketani Y, Juji T. Polymorphisms of RhDVa and a New RhDVa-Like Variant Found in Japanese Individuals. Vox Sang 2000. [DOI: 10.1046/j.1423-0410.2000.7820122.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Sekizawa A, Samura O, Zhen DK, Falco V, Bianchi DW. Fetal cell recycling: diagnosis of gender and RhD genotype in the same fetal cell retrieved from maternal blood. Am J Obstet Gynecol 1999; 181:1237-42. [PMID: 10561652 DOI: 10.1016/s0002-9378(99)70115-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Our aim was to develop a new technique, which we have termed fetal cell recycling, that combines the 2 powerful methods of fluorescence in situ hybridization and polymerase chain reaction to maximize the genetic information available from a small number of fetal nucleated erythrocytes obtained noninvasively from the blood of pregnant women. STUDY DESIGN Blood samples were obtained from 4 Rh-negative women after elective termination of pregnancy at 7 to 17 weeks' gestation. Fetal nucleated erythrocytes were separated by flow sorting with antibody to the gamma chain of fetal hemoglobin. Fluorescence in situ hybridization with chromosome-specific probes was used to diagnose fetal gender. After fluorescence in situ hybridization analysis the fetal nucleated erythrocytes were recycled by a micromanipulation technique and deoxyribonucleic acid diagnosis was performed with polymerase chain reaction amplification of the RhD gene. RESULTS Among the 4 case patients we detected a total of 101 fetal nucleated erythrocytes. All targeted cells were successfully retrieved with a micromanipulator. In each case we successfully performed both fluorescence in situ hybridization and polymerase chain reaction analysis. The predicted fetal gender and Rh status corresponded to the results obtained from fetal tissue. CONCLUSIONS Fetal cell recycling combines the powers of highly sensitive molecular methods to maximize the genetic information available from a single fetal cell. This technique will permit noninvasive diagnosis of recessively inherited single-gene disorders.
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Affiliation(s)
- A Sekizawa
- Division of Genetics, Departments of Pediatrics and Obstetrics and Gynecology, New England Medical Center, Tufts University School of Medicine, Boston, Massachusetts 02111, USA
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29
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Abstract
The recovery of fetal cells from the maternal circulation represents a promising approach to noninvasive prenatal diagnosis. Advances in techniques of sensitive molecular genetic analysis have enabled the conclusive demonstration of the presence of fetal cells in maternal blood. In most pregnancies, there are few fetal cells detectable. In some abnormal pregnancies, there appears to be increased fetomaternal transfusion, which facilitates recognition of aneuploid fetal cells. This review article describes general strategies of fetal cell isolation, current technical challenges, and clinical applications that are envisioned for the future. The increased appreciation of fetal cell microchimerism, and its association with complications of pregnancy and the postpartum development of autoimmune disease, is also discussed.
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Affiliation(s)
- B Pertl
- Department of Pediatrics, New England Medical Center, Tufts University School of Medicine, Boston, MA 02111, USA
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30
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Abstract
The prenatal diagnosis of fetal rhesus D (RhD) status is useful for the management of RhD-negative women with partners heterozygous for the RHD gene. Conventional methods for prenatal fetal RhD status determination involve invasive procedures such as fetal blood sampling and amniocentesis. The recent demonstration of the existence of cell-free fetal DNA in maternal plasma and serum opens up the possibility of determining fetal RhD status by analysis of maternal plasma or serum DNA. This possibility has recently been realized by three independent groups of investigators. This development represents an important step towards the routine application of noninvasive fetal blood group diagnosis in sensitized pregnancies and may become a model for developing safer noninvasive prenatal tests for other single-gene disorders.
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Affiliation(s)
- Y M Lo
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Kong Hong Special Administration Region.
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31
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Cunningham J, Yates Z, Hamlington J, Mason G, Mueller R, Miller D. Non-invasive RNA-based determination of fetal Rhesus D type: a prospective study based on 96 pregnancies. BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY 1999; 106:1023-8. [PMID: 10519426 DOI: 10.1111/j.1471-0528.1999.tb08108.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To develop a non-invasive method for determining fetal RhD status in order to provide improved care for women most at risk. DESIGN A prospective study. METHODS Fetal erythroblasts were enriched from the peripheral circulation of 96 RhD negative women with pregnancies at various stages in gestation using discontinuous density gradients. Amplification of RhD-specific mRNAs was carried out by reverse transcription-polymerase chain reaction assay. RNA, rather than DNA, was selected for amplification because it rarely contaminates samples, thus resulting in fewer false positives; moreover, its presence in multiple copies per cell should enhance the sensitivity of the assay, resulting in fewer false negatives. The study was prospective, relying on postnatal serological confirmation of RhD phenotype. RESULTS The assay was 75% accurate at predicting fetal RhD status, comparing favourably with standard genomic DNA-based assays. However, we found that accuracy dropped from 85% (29/34) in the third trimester of pregnancy, to 82% (32/39) in the second and 48% (11/23) in the first trimester. Discordant data were due to false negatives in the majority (78%) of cases. CONCLUSIONS We suggest that reverse transcription may be a useful and perhaps more sensitive alternative to standard genomic polymerase chain reaction in the majority of cases. However, under certain circumstances the absence or reduction of fetal erythroblasts or possibly RhD mRNA in some preparations may compromise the accuracy of the assay.
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Affiliation(s)
- J Cunningham
- Cytogenetics, Pathology Department, Ninewells Hospital and Medical School, Dundee, UK
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32
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Hahn S, Garvin AM, Di Naro E, Holzgreve W. Allele drop-out can occur in alleles differing by a single nucleotide and is not alleviated by preamplification or minor template increments. GENETIC TESTING 1999; 2:351-5. [PMID: 10464616 DOI: 10.1089/gte.1998.2.351] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The ability to analyze the genetic material of single cells by the PCR opens up new prospects for diagnostics. Because only two copies of the genetic template are available for amplification, a problem that frequently arises when examining heterozygous loci in single cells is allele drop-out (ADO). ADO results from the preferential amplification of one of a pair of heterozygous alleles, in which the other allele is totally under-represented. In examining single cells from carriers heterozygous for beta-thalassemia mutations, we have found ADO to occur in alleles differing by a single nucleotide, where either the normal or the mutant genotype was absent. We have found that ADO is not overcome by either increasing the amount of DNA template to 20 pg or by primer extension preamplification (PEP), but rather that the best diagnostic accuracy is obtained by examining multiple single cells and basing a diagnosis on the combined results of such an examination.
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Affiliation(s)
- S Hahn
- Department of Obstetrics and Gynecology, University of Basel, Switzerland.
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33
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Affiliation(s)
- D W Bianchi
- Division of Genetics, Department of Pediatrics, New England Medical Center, Boston, MA 02111, USA.
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34
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Sitar G, Garagna S, Zuccotti M, Falcinelli C, Montanari L, Alfei A, Ippoliti G, Redi CA, Moratti R, Ascari E, Forabosco A. Fetal erythroblast isolation up to purity from cord blood and their culture in vitro. ACTA ACUST UNITED AC 1999. [DOI: 10.1002/(sici)1097-0320(19990401)35:4<337::aid-cyto6>3.0.co;2-u] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
The prenatal diagnosis (PND) of severe hereditary skin diseases started in the early 1980s using fetal skin biopsy techniques based on ultrastructural and immunohistochemical abnormalities of the fetal skin. Recent success in identifying responsible genes and demonstrating mutations in such genes has set the stage for DNA-based PND in the 1990s. Common examples of skin conditions which can be prenatally diagnosed include epidermolysis bullosa, oculocutaneous albinism and Harlequin ichthyosis in which the severity of the clinical phenotype appears to justify PND in families at risk. More recently, preimplantation diagnoses of inherited diseases have become possible using in vitro fertilization techniques. The diagnosis consists of a blastomere biopsy of the six to ten-cell embryo and a DNA analysis of single blastomeres. Disease-free embryos are selected for transfer to the uterus, thereby avoiding the need for termination of a fetus found to be affected by conventional PND. Furthermore, carrying out a PND using a single fetal cell from the maternal blood, such as nucleated erythrocytes, has become technically feasible. Although there are many questions that remain unanswered, the outlook for further development of noninvasive PND in the future appears optimistic.
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Affiliation(s)
- H Shimizu
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan.
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36
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Dietmaier W, Hartmann A, Wallinger S, Heinmöller E, Kerner T, Endl E, Jauch KW, Hofstädter F, Rüschoff J. Multiple mutation analyses in single tumor cells with improved whole genome amplification. THE AMERICAN JOURNAL OF PATHOLOGY 1999; 154:83-95. [PMID: 9916922 PMCID: PMC1853424 DOI: 10.1016/s0002-9440(10)65254-6] [Citation(s) in RCA: 177] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Combining whole genome amplification (WGA) methods with novel laser-based microdissection techniques has made it possible to exploit recent progress in molecular knowledge of cancer development and progression. However, WGA of one or a few cells has not yet been optimized and systematically evaluated for samples routinely processed in tumor pathology. We therefore studied the value of established WGA protocols in comparison to an improved PEP (I-PEP) PCR method in defined numbers of flow-sorted and microdissected tumor cells obtained both from frozen as well as formalin-fixed and paraffin-embedded tissue sections. In addition, the feasibility of I-PEP-PCR for mutation analysis was tested using clusters of 50-100 unfixed tumor cells obtained by touch preparation of ten breast carcinomas by conventional sequencing of exon 7 and 8 of the p53 gene. Finally, immunocytochemically stained microdissected single disseminated tumor cells from bone marrow aspirates were investigated with respect to mutations in codon 12 of Ki-ras by restriction fragment length polymorphism (RFLP)-PCR after I-PEP-PCR. The modified I-PEP-PCR protocol was superior to the original PEP-PCR and DOP-PCR protocols concerning amplification of DNA from one cell (efficiency rate I-PEP-PCR 40% versus PEP-PCR 15% and DOP-PCR 30%) and five cells (efficiency rate I-PEP-PCR 100% versus PEP-PCR 33% and DOP-PCR 20%). Preamplification by I-PEP allowed 100% sequence accuracy in > 4000 sequenced base pairs and Ki-ras mutation detection in isolated single disseminated tumor cells. For reliable microsatellite analysis of I-PEP-preamplified DNA, at least 10 unfixed cells from fluorescence-activated cell sorting, 10 cells from frozen tissue, or at least 30 cells from formalin-fixed and paraffin-embedded tissue sections were required. Thus, I-PEP-PCR allowed multiple reliable microsatellite analyses suited for microsatellite instability and losses of heterozygosity and mutation analysis even at the single cell level, rendering this technique a powerful new tool for molecular analyses in diagnostic and experimental tumor pathology.
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Affiliation(s)
- W Dietmaier
- Institute of Pathology, the Department of Surgery, University of Regensburg, Germany.
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37
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Lo YM, Hjelm NM, Fidler C, Sargent IL, Murphy MF, Chamberlain PF, Poon PM, Redman CW, Wainscoat JS. Prenatal diagnosis of fetal RhD status by molecular analysis of maternal plasma. N Engl J Med 1998; 339:1734-8. [PMID: 9845707 DOI: 10.1056/nejm199812103392402] [Citation(s) in RCA: 552] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND The ability to determine fetal RhD Status noninvasively is useful in the treatment of RhD-sensitized pregnant women whose partners are heterozygous for the RhD gene. The recent demonstration of fetal DNA in maternal plasma raises the possibility that fetal RhD genotyping may be possible with the use of maternal plasma. METHODS We studied 57 RhD-negative pregnant women and their singleton fetuses. DNA extracted from maternal plasma was analyzed for the RhD gene with a fluorescence-based polymerase-chain-reaction (PCR) test sensitive enough to detect the RhD gene in a single cell. Fetal RhD status was determined directly by serologic analysis of cord blood or PCR analysis of amniotic fluid. RESULTS Among the 57 RhD-negative women, 12 were in their first trimester of pregnancy, 30 were in their second trimester, and 15 were in their third trimester. Thirty-nine fetuses were RhD-positive, and 18 were RhD-negative. In the samples obtained from women in their second or third trimester of pregnancy, the results of RhD PCR analysis of maternal plasma DNA were completely concordant with the results of serologic analysis. Among the maternal plasma samples collected in the first trimester, 2 contained no RhD DNA, but the fetuses were RhD-positive; the results in the other 10 samples were concordant (7 were RhD-positive, and 3 RhD-negative). CONCLUSIONS Noninvasive fetal RhD genotyping can be performed rapidly and reliably with the use of maternal plasma beginning in the second trimester of pregnancy.
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Affiliation(s)
- Y M Lo
- Department of Chemical Pathology, Chinese University of Hong Kong, Prince of Wales Hospital
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38
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Flegel WA, Wagner FF, Müller TH, Gassner C. Rh phenotype prediction by DNA typing and its application to practice. Transfus Med 1998; 8:281-302. [PMID: 9881423 DOI: 10.1046/j.1365-3148.1998.00173.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The complexity of the RHD and RHCE genes, which is the greatest of all blood group systems, confounds analysis at the molecular level. RH DNA typing was introduced in 1993 and has been applied to prenatal testing. PCR-SSP analysis covering multiple polymorphisms was recently introduced for the screening and initial characterization of partial D. Our objective is to summarize the accrued knowledge relevant to the approaches to Rh phenotype prediction by DNA typing, their possible applications beyond research laboratories and their limitations. The procedures, results and problems encountered are highly detailed. It is recommended that DNA typing comprises an analysis of more than one polymorphism. We discuss future directions and propose a piecemeal approach to improve reliability and cost-efficiency of blood group genotyping that may eventually replace the prevalent serology-based techniques even for many routine tasks. Transfusion medicine is in the unique position of being able to utilize the most extensive phenotype databases available to check and develop genotyping strategies.
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Affiliation(s)
- W A Flegel
- Abteilung Transfusionsmedizin, Universitätsklinikum Ulm, Germany.
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39
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Abstract
Individually adjusted or 'customised' growth charts aim to optimise the assessment of fetal growth by taking individual variation into account, and by projecting an optimal curve which delineates the potential weight gain in each pregnancy. This results in an increased detection rate of true growth restriction and a reduction in false positive diagnoses for IUGR. An adjustable standard can apply across geographical boundaries, as individual variation exceeds that between different maternity populations.
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Affiliation(s)
- J Gardosi
- PRAM, University Hospital, Queens' Medical Centre, Nottingham, U.K.
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40
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Sohda S, Arinami T, Hamada H, Nakauchi H, Hamaguchi H, Kubo T. The Proportion of Fetal Nucleated Red Blood Cells in Maternal Blood: Stimation by FACS Analysis. Prenat Diagn 1997. [DOI: 10.1002/(sici)1097-0223(199708)17:8<743::aid-pd144>3.0.co;2-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Abstract
The introduction of molecular biology techniques to the field of transfusion medicine has allowed more detailed analysis of the basis for the expression of several blood-group antigens. The application of the polymerase chain reaction for the determination of red-cell blood-group genotype is a highly sensitive technique that can be used to determine the likelihood of a fetus being affected by haemolytic disease of the fetuses or newborn. This alone makes polymerase chain reaction based techniques highly desirable for such applications. The determination of the genetic basis for the Kell/Cellano polymorphism has enabled the development of polymerase chain reaction-based techniques for genotyping. Several other red-cell blood-group antigen polymorphisms can also be analysed in this way.
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Affiliation(s)
- M T Murphy
- Glasgow and West of Scotland Blood Transfusion Service, Law Hospital, Carluke, UK
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