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Szczykutowicz J. Ligand Recognition by the Macrophage Galactose-Type C-Type Lectin: Self or Non-Self?-A Way to Trick the Host's Immune System. Int J Mol Sci 2023; 24:17078. [PMID: 38069400 PMCID: PMC10707269 DOI: 10.3390/ijms242317078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/24/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023] Open
Abstract
The cells and numerous macromolecules of living organisms carry an array of simple and complex carbohydrates on their surface, which may be recognized by many types of proteins, including lectins. Human macrophage galactose-type lectin (MGL, also known as hMGL/CLEC10A/CD301) is a C-type lectin receptor expressed on professional antigen-presenting cells (APCs) specific to glycans containing terminal GalNAc residue, such as Tn antigen or LacdiNAc but also sialylated Tn antigens. Macrophage galactose-type lectin (MGL) exhibits immunosuppressive properties, thus facilitating the maintenance of immune homeostasis. Hence, MGL is exploited by tumors and some pathogens to trick the host immune system and induce an immunosuppressive environment to escape immune control. The aims of this article are to discuss the immunological outcomes of human MGL ligand recognition, provide insights into the molecular aspects of these interactions, and review the MGL ligands discovered so far. Lastly, based on the human fetoembryonic defense system (Hu-FEDS) hypothesis, this paper raises the question as to whether MGL-mediated interactions may be relevant in the development of maternal tolerance toward male gametes and the fetus.
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Affiliation(s)
- Justyna Szczykutowicz
- Department of Biochemistry and Immunochemistry, Division of Chemistry and Immunochemistry, Wroclaw Medical University, Sklodowskiej-Curie 48/50, 50-369 Wroclaw, Poland
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Di Fiore R, Suleiman S, Drago-Ferrante R, Subbannayya Y, Suleiman S, Vasileva-Slaveva M, Yordanov A, Pentimalli F, Giordano A, Calleja-Agius J. The Role of FBXW7 in Gynecologic Malignancies. Cells 2023; 12:1415. [PMID: 37408248 DOI: 10.3390/cells12101415] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/28/2023] [Accepted: 05/15/2023] [Indexed: 07/07/2023] Open
Abstract
The F-Box and WD Repeat Domain Containing 7 (FBXW7) protein has been shown to regulate cellular growth and act as a tumor suppressor. This protein, also known as FBW7, hCDC4, SEL10 or hAGO, is encoded by the gene FBXW7. It is a crucial component of the Skp1-Cullin1-F-box (SCF) complex, which is a ubiquitin ligase. This complex aids in the degradation of many oncoproteins, such as cyclin E, c-JUN, c-MYC, NOTCH, and MCL1, via the ubiquitin-proteasome system (UPS). The FBXW7 gene is commonly mutated or deleted in numerous types of cancer, including gynecologic cancers (GCs). Such FBXW7 mutations are linked to a poor prognosis due to increased treatment resistance. Hence, detection of the FBXW7 mutation may possibly be an appropriate diagnostic and prognostic biomarker that plays a central role in determining suitable individualized management. Recent studies also suggest that, under specific circumstances, FBXW7 may act as an oncogene. There is mounting evidence indicating that the aberrant expression of FBXW7 is involved in the development of GCs. The aim of this review is to give an update on the role of FBXW7 as a potential biomarker and also as a therapeutic target for novel treatments, particularly in the management of GCs.
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Affiliation(s)
- Riccardo Di Fiore
- Department of Anatomy, Faculty of Medicine and Surgery, University of Malta, MSD 2080 Msida, Malta
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, PA 19122, USA
| | - Sherif Suleiman
- Department of Anatomy, Faculty of Medicine and Surgery, University of Malta, MSD 2080 Msida, Malta
| | | | - Yashwanth Subbannayya
- School of Biosciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford GU2 7XH, UK
| | - Sarah Suleiman
- Whipps Cross Hospital, Barts Health NHS Trust, Leytonstone, London E11 1NR, UK
| | - Mariela Vasileva-Slaveva
- Department of Breast Surgery, "Dr. Shterev" Hospital, 1330 Sofia, Bulgaria
- Research Institute, Medical University Pleven, 5800 Pleven, Bulgaria
- Bulgarian Breast and Gynecological Cancer Association, 1784 Sofia, Bulgaria
| | - Angel Yordanov
- Department of Gynecological Oncology, Medical University Pleven, 5800 Pleven, Bulgaria
| | - Francesca Pentimalli
- Department of Medicine and Surgery, LUM University "Giuseppe DeGennaro", 70010 Casamassima, Italy
| | - Antonio Giordano
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, PA 19122, USA
- Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy
| | - Jean Calleja-Agius
- Department of Anatomy, Faculty of Medicine and Surgery, University of Malta, MSD 2080 Msida, Malta
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Sun G, Zhang Q, Liu Y, Xie P. Role of Phosphatidylinositol 3-Kinase and Its Catalytic Unit PIK3CA in Cervical Cancer: A Mini-Review. Appl Bionics Biomech 2022; 2022:6904769. [PMID: 36046780 PMCID: PMC9420646 DOI: 10.1155/2022/6904769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/15/2022] [Accepted: 07/22/2022] [Indexed: 11/17/2022] Open
Abstract
In complicated disorders like cancer, signaling pathways form a tangled network. Targeting one gene may result in an unfavorable reaction from another off-target gene. Such entwined complexities may result in treatment resistance or failure in cancer patients. The PI3K/Akt/mTOR (phosphoinositol 3-kinase/protein kinase B/mammalian target of rapamycin) pathway is dysregulated in cervical cancer and is used as a biomarker for therapy. PI3K is a kinase that consists of a regulatory and catalytic domain and has phosphorylation capability. Class I components like the catalytic part (PIK3CA and PIK3CD) and regulatory part (like PIK3R1, PIK3R2, PIK3R3, and PIK3R5) are associated with oncogenesis and growth factors in cervical cancer. This review is aimed at discussing the involvement of the PI3K component of the PI3K/Akt/mTOR network in cervical cancer. Specifically, class I catalytic subunit PIK3CA has been identified as a pharmacological target, making it therapeutically significant. Apart from discussing the function of PI3K and PIK3CA in cervical cancer, we also discuss their inhibitors, which may be beneficial in treating cervical cancer.
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Affiliation(s)
- Guojuan Sun
- Ward Section of Home Overseas Doctors, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, China
| | - Qiang Zhang
- Ward Section of Home Overseas Doctors, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, China
| | - Yi Liu
- Maternity Rehabilitation Center, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, China
| | - Ping Xie
- Ward Section of Home Overseas Doctors, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, China
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High incidence of PI3K pathway gene mutations in South Indian cervical cancers. Cancer Genet 2022; 264-265:100-108. [DOI: 10.1016/j.cancergen.2022.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 04/28/2022] [Accepted: 05/01/2022] [Indexed: 12/24/2022]
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Patrono MG, Calvo MF, Franco JVA, Garrote V, Vietto V. A systematic review and meta-analysis of the prevalence of therapeutic targets in cervical cancer. Ecancermedicalscience 2021; 15:1200. [PMID: 33889209 PMCID: PMC8043690 DOI: 10.3332/ecancer.2021.1200] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Indexed: 02/04/2023] Open
Abstract
Cervical Cancer (CC) is a significantly prevalent disease in developing countries. Currently, targeted therapies are not a primary standard of care in CC. This information could be crucial for developing directed therapies and patient screening for biomarkers that would allow personalised treatment of CC. This systematic review aimed to estimate the prevalence of potential therapeutic targets such as the epidermal growth factor receptor (EGFR) and the PI3K/Akt/mTOR and Ras/Raf/MAPK pathways in patients with CC, identified through genomic and non-genomic testing. Studies were identified through an ad-hoc search strategy from the available on MEDLINE (Ovid), CENTRAL, LILACS, SCOPUS, through the Clinical Trial registry on Clinicaltrials.gov, International Clinical Trials Registry Platform, RENIS (Argentine National Registry of Health Research) and grey literature sources. We included 74 studies which represented a total pool of 7,862 participants. Forty-five studies informed mutations of EGFR, with a combined positivity rate of 53% (95%CI: 45%-60%; I2 = 95%). Twenty studies informed the presence of mutations in PIK3CA with a combined positivity rate of 30% (95%CI: 21%-39%; I2 = 96%). Twenty-three studies reported a mutation in Ras, with a combined positivity rate of 14% (95%CI: 8%-21%; I2 = 95%). Raf mutations were informed in six studies. Six studies informed the presence of Akt mutations, two studies informed mTOR mutations and only one study reported mutations of MAPK. The most frequently described therapeutic targets were EGFR, and the PIK3CA and Ras pathways, though inconsistency in positivity rates was significant. Our study did not allow the identification of any specific clinical characteristics that might explain the observed heterogeneity. Despite the overall good quality of the included studies, the applicability of these results to patients' general population with CC is still unclear.
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Affiliation(s)
- Maria Guadalupe Patrono
- Department of Gynecology, Hospital Italiano de Buenos Aires, Gascon 450, Buenos Aires C1181ACH, Argentina
- https://orcid.org/0000-0002-1309-2114
| | - Maria Florencia Calvo
- Department of Gynecology, Hospital Italiano de Buenos Aires, Gascon 450, Buenos Aires C1181ACH, Argentina
- https://orcid.org/0000-0002-2224-1564
| | - Juan Victor Ariel Franco
- Family and Community Medicine Division, Hospital Italiano de Buenos Aires, Gascon 450, Buenos Aires C1181ACH, Argentina
- Argentine Cochrane Centre, Instituto Universitario Hospital Italiano, Potosí 4265, Buenos Aires C1199ABB, Argentina
- https://orcid.org/0000-0003-0411-899X
| | - Virginia Garrote
- Central Library, Hospital Italiano de Buenos Aires, Instituto Universitario Hospital Italiano de Buenos Aires, Tte. J. D. Perón 4190, 1º floor, stair J. C1199ABB, Argentina
- https://orcid.org/0000-0002-7328-6228
| | - Valeria Vietto
- Family and Community Medicine Division, Hospital Italiano de Buenos Aires, Gascon 450, Buenos Aires C1181ACH, Argentina
- Argentine Cochrane Centre, Instituto Universitario Hospital Italiano, Potosí 4265, Buenos Aires C1199ABB, Argentina
- https://orcid.org/0000-0003-4619-9812
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Diefenbach D, Greten HJ, Efferth T. Genomic landscape analyses in cervical carcinoma and consequences for treatment. Curr Opin Pharmacol 2020; 54:142-157. [PMID: 33166910 DOI: 10.1016/j.coph.2020.09.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/26/2020] [Accepted: 09/27/2020] [Indexed: 11/28/2022]
Abstract
Where we are on the road to 'tailor-made' precision medicine for drug-resistant cervical carcinoma? We explored studies about analyses of viral and human genomes, epigenomes and transcriptomes, DNA mutation analyses, their importance in detecting HPV sequences, mechanisms of drug resistance to established and targeted therapies with small molecule or therapeutic antibodies, to radiosensitivity and to chemoradiotherapy. The value of repurposing of old drugs initially approved for other disease indications and now considered for cervix cancer therapy is also discussed. The microbiome influences drug response and survival too. HPV genomic integration sites were less significant. Nomograms (Lee et al., 2013) even outperformed FIGO staging regarding prediction of five-year overall survival times. We conclude that there are still many loose threads to be followed up, before coherent conclusions for individualized therapy of drug-resistant cervical carcinoma can be drawn.
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Affiliation(s)
- Dominik Diefenbach
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Mainz, Germany
| | | | - Thomas Efferth
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Mainz, Germany.
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Prabawa IPY, Bhargah A, Liwang F, Tandio DA, Tandio AL, Lestari AAW, Budiana ING, Manuaba IBAP. Pretreatment Neutrophil-to-Lymphocyte ratio (NLR) and Platelet-to-Lymphocyte Ratio (PLR) as a Predictive Value of
Hematological Markers in Cervical Cancer. Asian Pac J Cancer Prev 2019; 20:863-868. [PMID: 30912405 PMCID: PMC6825764 DOI: 10.31557/apjcp.2019.20.3.863] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Background: Inflammation represents a pivotal role in the progression of cervical cancer. The hematological markers of inflammation in complete blood count (CBC) panel are potentially useful in determining the prognosis of the disease. Objective: The aim of the study was to investigate whether the pretreatment neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) could be used as in predicting the stage of cervical cancer. Methods: A retrospective cross-sectional study involving 282 patients with cervical cancer was enrolled at Sanglah General Hospital for five years (2013-2017). The histopathological records and complete blood counts (CBC) of the patients were collected and analyzed using SPSS ver. 16 software. FIGO stage I–II and III-IV were classified as early and advance stage respectively. Results: The median NLR and PLR were significantly higher in the advance stage compared with early stage (7.58 (1.36-33.20) and 247.89 (97.10-707.11); p-value = 0.001). A strong positive correlation was found between the staging of cervical cancer and NLR (r=0.638) and PLR (r=0.668). The AUC, sensitivity, and specificity value of NLR and PLR were 0.803 (82%; 71%) and 0.716 (72%; 70%). Advanced stage of cervical cancer was found in high NLR (adjusted OR: 9.02; 95%CI=2.42-33.64; p=0.001) and PLR (adjusted OR = 2.47; 95% CI = 1.45-4.85; p = 0.032). Conclusion: Increased pretreatment NLR and PLR values may provide a useful information in predicting the staging of cervical cancer.
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Affiliation(s)
- I Putu Yuda Prabawa
- Master Program in Biomedicine, Faculty of Medicine, Udayana University, Bali, Indonesia. ,Department of Clinical Pathology, Sanglah General Hospital, Udayana University, Faculty of Medicine, Bali, Indonesia
| | - Agha Bhargah
- Post Graduate Student, Faculty of Medicine, Udayana University, Bali, Indonesia
| | - Firdy Liwang
- Post Graduate Student, Faculty of Medicine, Sam Ratulangi University, Manado, Indonesia
| | - Deasy Ayuningtyas Tandio
- Public Health Officer, Timor Tengah Utara Health Department, East Nusa Tenggara Province, Indonesia
| | - Aditya Leonard Tandio
- Post graduate student in public health, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Australia
| | - Anak Agung Wiradewi Lestari
- Department of Clinical Pathology, Sanglah General Hospital, Udayana University, Faculty of Medicine, Bali, Indonesia
| | - I Nyoman Gede Budiana
- Department of Obstetrics and Gynecology, Sanglah General Hospital, Faculty of Medicine, Udayana University, Bali, Indonesia
| | - Ida Bagus Amertha Putra Manuaba
- International Program of Medicine, Taipei Medical University, Taipei, Taiwan.,Medical and Health Education, Faculty of Medicine, Udayana University, Bali, Indonesia
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Sahasrabudhe NM, van der Horst JC, Spaans V, Kenter G, de Kroon C, Bosse T, van Vliet SJ, Jordanova ES. MGL Ligand Expression Is Correlated to Lower Survival and Distant Metastasis in Cervical Squamous Cell and Adenosquamous Carcinoma. Front Oncol 2019; 9:29. [PMID: 30761272 PMCID: PMC6361794 DOI: 10.3389/fonc.2019.00029] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 01/10/2019] [Indexed: 11/13/2022] Open
Abstract
Cervical cancer is the fourth most common cancer type in women worldwide and is characterized by a highly immune-suppressive microenvironment. Here, we describe aberrant glycosylation as a factor mediating this immunosuppressive microenvironment. Expression of a specific carbohydrate ligand for the immune-regulatory C-type lectin MGL was correlated to poor disease-specific survival and distant recurrences in squamous cell carcinoma (SCC) and adenosquamous carcinoma (ASC), the most common histological subtypes of cervical cancer. MGL ligand expression was also associated with lymph node metastasis, the absence of CD14+ myeloid cells and the presence of CD14-CD163+ myeloid cells. Indeed, expression of the MGL receptor itself could be detected on CD163+ cells, suggesting that MGL+ myeloid cells are able to interact locally with MGL ligand+ tumor cells. Additionally, MGL ligand expression correlated to the occurrence of PIK3CA mutations, the most frequently observed oncogenic alteration in cervical cancer. In conclusion, we present prognostic value for MGL ligand expression in SCC/ASC patients, which further supports an immune evasive role for the C-type lectin MGL in the tumor immune compartment.
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Affiliation(s)
- Neha M. Sahasrabudhe
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection & Immunity Institute, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Joost C. van der Horst
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection & Immunity Institute, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Vivian Spaans
- Department of Pathology, Leiden University Medical Centre, Leiden, Netherlands
- Department of Obstetrics and Gynecology, Leiden University Medical Centre, Leiden, Netherlands
| | - Gemma Kenter
- Department of Obstetrics and Gynecology, Center for Gynecological Oncology Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Cor de Kroon
- Department of Obstetrics and Gynecology, Leiden University Medical Centre, Leiden, Netherlands
| | - Tjalling Bosse
- Department of Pathology, Leiden University Medical Centre, Leiden, Netherlands
| | - Sandra J. van Vliet
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection & Immunity Institute, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Ekaterina S. Jordanova
- Department of Pathology, Leiden University Medical Centre, Leiden, Netherlands
- Department of Obstetrics and Gynecology, Center for Gynecological Oncology Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
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Wang M, Fan W, Ye M, Tian C, Zhao L, Wang J, Han W, Yang W, Gu C, Li M, Zhang Z, Wang Y, Zhang H, Meng Y. Molecular profiles and tumor mutational burden analysis in Chinese patients with gynecologic cancers. Sci Rep 2018; 8:8990. [PMID: 29895933 PMCID: PMC5997642 DOI: 10.1038/s41598-018-25583-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 04/13/2018] [Indexed: 12/27/2022] Open
Abstract
The goal of this work was to investigate the tumor mutational burden (TMB) in Chinese patients with gynecologic cancer. In total, 117 patients with gynecologic cancers were included in this study. Both tumor DNA and paired blood cell genomic DNA were isolated from formalin-fixed paraffin-embedded (FFPE) specimens and blood samples, and next-generation sequencing was performed to identify somatic mutations. TP53, PTEN, ARID1A, and PIK3CA alterations were significantly different in various types of gynecologic cancers (p = 0.001, 1.15E-07, 0.004, and 0.009, respectively). The median TMB of all 117 gynecologic tumor specimens was 0.37 mutations/Mb, with a range of 0-41.45 mutations/Mb. Despite the lack of significant difference, endometrial cancer cases had a higher median TMB than cervical and ovarian cancer cases. Younger gynecologic cancer patients (age <40 years) had a significantly lower TMB than older patients (age ≥40 years) (p = 0.04). In addition, TMB was significantly increased with increasing clinical stage of disease (p = 0.001). PTEN alterations were commonly observed in patients with a moderate to high TMB (n = 8, 38.10%, p = 9.95E-04). Although limited by sample size, all of the patients with TSC2 (n = 3, p = 3.83E-11) or POLE (n = 2, p = 0.005) mutations had a moderate to high TMB. Further large-scale, prospective studies are needed to validate our findings.
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Affiliation(s)
- Min Wang
- Department of Gynecology and Obstetrics, Chinese PLA General Hospital, Beijing, P.R. China
- Department of Gynecology and Obstetrics, The 306th Hospital of PLA, Beijing, P.R. China
| | - Wensheng Fan
- Department of Gynecology and Obstetrics, Chinese PLA General Hospital, Beijing, P.R. China
| | - Mingxia Ye
- Department of Gynecology and Obstetrics, Chinese PLA General Hospital, Beijing, P.R. China
| | - Chen Tian
- Beijing Genecast Biotechnology Co., Beijing, P.R. China
| | - Lili Zhao
- Beijing Genecast Biotechnology Co., Beijing, P.R. China
| | - Jianfei Wang
- Beijing Genecast Biotechnology Co., Beijing, P.R. China
| | - Wenbo Han
- Beijing Genecast Biotechnology Co., Beijing, P.R. China
| | - Wen Yang
- Department of Gynecology and Obstetrics, Chinese PLA General Hospital, Beijing, P.R. China
| | - Chenglei Gu
- Department of Gynecology and Obstetrics, Chinese PLA General Hospital, Beijing, P.R. China
| | - Mingxia Li
- Department of Gynecology and Obstetrics, Chinese PLA General Hospital, Beijing, P.R. China
| | - Zhe Zhang
- Department of Gynecology and Obstetrics, Chinese PLA General Hospital, Beijing, P.R. China
| | - Yongjun Wang
- Department of Gynecology and Obstetrics, Peking University International Hospital, Beijing, P.R. China
- Department of Gynecology and Obstetrics, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, P.R. China
| | - Henghui Zhang
- Institute of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, P.R. China.
- Beijing Genecast Biotechnology Co., Beijing, P.R. China.
| | - Yuanguang Meng
- Department of Gynecology and Obstetrics, Chinese PLA General Hospital, Beijing, P.R. China.
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