scholarly journals Circulating Placental Vesicles Carry HLA-DR in Pre-Eclampsia: A New Potential Marker of the Syndrome

2021 ◽  
Vol 12 ◽  
Author(s):  
Chiara Tersigni ◽  
Donatella Lucchetti ◽  
Rita Franco ◽  
Filomena Colella ◽  
Caterina Neri ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Venous Blood ◽  
Human Leukocyte ◽  
Specific Marker ◽  
Placental Alkaline Phosphatase ◽  
Maternal Circulation ◽  
Aberrant Expression ◽  
Maternal Immune System ◽  
Potential Marker ◽  
Hla Dr

BackgroundPre-eclampsia (PE) is a common disorder of pregnancy that usually presents with hypertension and proteinuria. The clinical presentation arises from soluble factors released into the maternal circulation from the placenta owing to the stress of syncytiotrophoblast, consequence of defective placentation occurring in the first half of pregnancy. Reduced tolerance of the semiallogeneic fetus by the maternal immune system has been proposed as first trigger leading to poor placentation. We previously observed aberrant expression of human leukocyte antigen (HLA)-DR molecules in the syncytiotrophoblast of a subset of women with PE. Aim of this study was to investigate abnormal expression of circulating HLA-DR in syncytiotrophoblast-derived extracellular vesicles (STBEVs) in women with PE compared to normal pregnant women.Methodsperipheral venous blood was collected from 22 women with PE and 22 normal pregnant women. Circulating STBEVs were collected by ultra-centrifugation (120000 g) and analyzed for the expression of HLA-DR and placental alkaline phosphatase (PLAP), a specific marker of the placenta, by Western blot analysis and flow cytometry.Resultscirculating STBEVs positive for HLA-DR were observed in 64% of PE women while no HLA-DR positivity was detected in any of the controls (P<0.01).ConclusionsAberrant expression of HLA-DR in circulating STBEVs is specifically associated to PE. Further studies are required: a) to define the role of aberrant placental expression of HLA-DR molecules in the pathogenesis of PE; b) evaluate a possible application of detecting circulating HLA-DR positive STBEVs in the diagnosis and prediction of PE in the first and second trimester of pregnancy.

scholarly journals HLA-G in Preeclampsia: a Pilot Study to Propose a Tolerogenic Treatment

2018 ◽  
Vol 6 (2) ◽  
pp. 56-60
Author(s):  
César Lucio García ◽  
Cynthia Ayerim Lucio García ◽  
Arely Sarai Alonso Barreto ◽  
María del Socorro Camarillo Romero ◽  
Cristian Fabian Layton Tovar ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Pregnant Women ◽  
Sexual Intercourse ◽  
Laboratory Data ◽  
Human Leukocyte ◽  
Serum Levels ◽  
Enzyme Linked Immunosorbent Assay ◽  
Leukocyte Antigen ◽  
Hla Dr ◽  
Spss Software

Background: The serum level of soluble Human Leukocyte Antigen-antigen-D Related (HLA)-(DR) (sHLA-DR) may appear as a useful parameter to monitor maternal immune response during pregnancy. Objective: The aim was to compare HLA-G serum levels in patients with or without preeclampsia. Methods: Pregnant women seen at the “Mónica Pretelini Sáenz” Maternal-Perinatal Hospital (HMPMPS) were recruited at their first visit. Two groups were conformed: a) women with healthy pregnancies, and b) women with preeclampsia. The patients’ sociodemographic and laboratory data were introduced into the SPSS software program. HLA-G quantification was performed in peripheral blood samples through the Enzyme-linked Immunosorbent Assay (ELISA) method. Results: The total number of women seen was 16 (mean age, 24 ± 8 years), eight healthy women (mean age, 22 ± 3 years) and eight women with preeclampsia (mean age, 27 ± 7 years). Women with preeclampsia were older, heavier, had higher levels of Systolic Blood Pressure (SBP), Diastolic Blood Pressure (DBP), Mean Arterial Pressure (MAP), and referred less sexual intercourse per week than healthy pregnant women. There was no difference in HLA-G levels. Conclusion: The sexual intercourse frequency is a major factor to develop preeclampsia and the serum HLA-G levels measured previous to the child delivery or cesarean are not different between women with or without preeclampsia.

scholarly journals A Multi-Omics Analysis of Metastatic Melanoma Identifies a Germinal Center-Like Tumor Microenvironment in HLA-DR-Positive Tumor Areas

2021 ◽  
Vol 11 ◽  
Author(s):  
Laura Gadeyne ◽  
Yannick Van Herck ◽  
Giorgia Milli ◽  
Zeynep Kalender Atak ◽  
Maddalena Maria Bolognesi ◽  
...  
Keyword(s):  
Metastatic Melanoma ◽  
Germinal Center ◽  
Immune Cell ◽  
Checkpoint Inhibitors ◽  
Predictive Biomarkers ◽  
Human Leukocyte ◽  
Melanoma Cells ◽  
Cytotoxic T Cell ◽  
Aberrant Expression ◽  
Hla Dr

The emergence of immune checkpoint inhibitors has dramatically changed the therapeutic landscape for patients with advanced melanoma. However, relatively low response rates and a high incidence of severe immune-related adverse events have prompted the search for predictive biomarkers. A positive predictive value has been attributed to the aberrant expression of Human Leukocyte Antigen-DR (HLA-DR) by melanoma cells, but it remains unknown why this is the case. In this study, we have examined the microenvironment of HLA-DR positive metastatic melanoma samples using a multi-omics approach. First, using spatial, single-cell mapping by multiplexed immunohistochemistry, we found that the microenvironment of HLA-DR positive melanoma regions was enriched by professional antigen presenting cells, including classical dendritic cells and macrophages, while a more general cytotoxic T cell exhaustion phenotype was present in these regions. In parallel, transcriptomic analysis on micro dissected tissue from HLA-DR positive and HLA-DR negative areas showed increased IFNγ signaling, enhanced leukocyte adhesion and mononuclear cell proliferation in HLA-DR positive areas. Finally, multiplexed cytokine profiling identified an increased expression of germinal center cytokines CXCL12, CXCL13 and CCL19 in HLA-DR positive metastatic lesions, which, together with IFNγ and IL4 could serve as biomarkers to discriminate tumor samples containing HLA-DR overexpressing tumor cells from HLA-DR negative samples. Overall, this suggests that HLA-DR positive areas in melanoma attract the anti-tumor immune cell infiltration by creating a dystrophic germinal center-like microenvironment where an enhanced antigen presentation leads to an exhausted microenvironment, nevertheless representing a fertile ground for a better efficacy of anti-PD-1 inhibitors due to simultaneous higher levels of PD-1 in the immune cells and PD-L1 in the HLA-DR positive melanoma cells.

scholarly journals Imunologi Human Immunodeficiency Virus (HIV) dalam Kehamilan

2017 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Maya Savira
Keyword(s):  
Human Immunodeficiency Virus ◽  
Immune System ◽  
Hiv Infection ◽  
Pregnant Women ◽  
Vertical Transmission ◽  
Human Leukocyte ◽  
Hla Dr ◽  
Immunodeficiency Virus ◽  
Hiv 1 ◽  
Hiv Aids

Human Immunodeficiency Virus can be spread through sexual contact , blood products and vertical transmission ofthe mother to the fetus . The high incidence of HIV / AIDS around the world in women over 15 years old and childrenunder the age of 15 years gives an overview of HIV / AIDS cases in pregnant women likely to have a high incidence.HIV viral RNA viruses belonged to two different types , namely HIV - 1 and HIV - 2 . Most cases are caused by HIV- 1. HIV primarily infects CD4 lymphocytes or T helper ( Th ), the numbers will decrease , as well as the function ofthe immune system will decrease. During pregnancy occurs emphasis on immune cells, with or without HIV infection.Study in France showed no significant progression between the immune system of pregnant women with HIV andnormal pregnant women . T reg on HIV infection in lymphoid tissue accumulated and the number of T reg postpartum was higher in patients with HIV infection compared to HIV- negative . Human Leukocyte antigen - G ( HLA- G ) inhibits cell-mediated immune response and can penetrate the placenta spread of HIV - 1 infection and increasethe risk of vertical transmission . Major histocompatibility complex ( MHC ) encodes HLA - G to inhibit natural killercells ( NK cells) that supports the entry of the virus passes through the placental barrier in HIV- 1 positive pregnantwomen . HIV infection activates CD8 expressing HLA - DR antigen . CD8 immune activation in chronic HIV becomesa factor decreasing CD4 count . The expression of HLA - DR and CD38 on CD8 T lymphocytes that recognize CD4eliminated by HIV infection Total CD8 , CD38 , and HLA - DR is reduced in HIV- positive pregnant women may bea prognostic parameters of immune status.

scholarly journals Lactate dehydrogenase levels in preeclampsia and its correlation with maternal and perinatal outcome

2019 ◽  
Vol 8 (4) ◽  
pp. 1505
Author(s):  
Nirmala Bhandari ◽  
Anjali Gupta ◽  
Simmi Kharb ◽  
Meenakshi Chauhan
Keyword(s):  
Lactate Dehydrogenase ◽  
Pregnant Women ◽  
Perinatal Outcome ◽  
Serum Lactate Dehydrogenase ◽  
Hypertensive Disorder ◽  
Perinatal Complications ◽  
Maternal Complications ◽  
Singleton Pregnancy ◽  
Intracellular Enzyme ◽  
Potential Marker

Background: Hypertensive disorder of pregnancy occurs in approximately 6-8% of all pregnancies. The most serious consequences for the mother and the baby are the result of preeclampsia and eclampsia. Lactate Dehydrogenase (LDH) is an intracellular enzyme. Recently LDH has been suggested as potential marker to predict severity of pre-eclampsia. The objective of the present study was to compare the serum lactate dehydrogenase levels in women with preeclampsia and normal pregnant women and to correlate lactate dehydrogenase levels with maternal and perinatal outcome in preeclampsia.Methods: An observational prospective study was conducted on 200 antenatal women attending the labour room emergency. Women with singleton pregnancy and cephalic presentation, from 28 weeks onwards were enrolled in the study. Out of 200, 100 were normal pregnant women and 100 were preeclamptic women. Serum LDH levels were measured in all women and maternal and perinatal outcome was assessed in terms of LDH levels.Results: Higher levels of LDH was observed in pregnant women with preeclampsia (627.38±230.04 IU/l) as compared to normal pregnant women (224.43±116.61 IU/l). The maternal complications were found to be maximum in women with LDH > 800 IU/l.  Abruption was the most common complication. The perinatal mortality and neonatal deaths were found to have significant correlation with high LDH levels.Conclusions: Maternal and perinatal complications were associated with higher LDH levels in preeclampsia patients. Serum LDH levels can be offered to all patients of preeclampsia and can be used to predict the prognosis of preeclampsia.

scholarly journals Myeloid phenotypes in severe COVID-19 predict secondary infection and mortality: a pilot study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Clémence Marais ◽  
Caroline Claude ◽  
Nada Semaan ◽  
Ramy Charbel ◽  
Simon Barreault ◽  
...  
Keyword(s):  
Critically Ill ◽  
Host Response ◽  
Secondary Infection ◽  
Myeloid Cells ◽  
Suppressor Cells ◽  
Human Leukocyte ◽  
Myeloid Derived Suppressor Cells ◽  
Phenotypic Characteristics ◽  
Leukocyte Antigen ◽  
Hla Dr

Abstract Background De-regulated host response to severe coronavirus disease 2019 (COVID-19), directly referring to the concept of sepsis-associated immunological dysregulation, seems to be a strong signature of severe COVID-19. Myeloid cells phenotyping is well recognized to diagnose critical illness-induced immunodepression in sepsis and has not been well characterized in COVID-19. The aim of this study is to review phenotypic characteristics of myeloid cells and evaluate their relations with the occurrence of secondary infection and mortality in patients with COVID-19 admitted in an intensive care unit. Methods Retrospective analysis of the circulating myeloid cells phenotypes of adult COVID-19 critically ill patients. Phenotyping circulating immune cells was performed by flow cytometry daily for routine analysis and twice weekly for lymphocytes and monocytes subpopulations analysis, as well as monocyte human leukocyte antigen (mHLA)-DR expression. Results Out of the 29 critically ill adult patients with severe COVID-19 analyzed, 12 (41.4%) developed secondary infection and six patients died during their stay. Monocyte HLA-DR kinetics was significantly different between patients developing secondary infection and those without, respectively, at day 5–7 and 8–10 following admission. The monocytes myeloid-derived suppressor cells to total monocytes ratio was associated with 28- and 60-day mortality. Those myeloid characteristics suggest three phenotypes: hyperactivated monocyte/macrophage is significantly associated with mortality, whereas persistent immunodepression is associated with secondary infection occurrence compared to transient immunodepression. Conclusions Myeloid phenotypes of critically ill COVID-19 patients may be associated with development of secondary infection, 28- and 60-day mortality.

Immunophenotypic Study of Basophils by Multiparameter Flow Cytometry

2008 ◽  
Vol 132 (5) ◽  
pp. 813-819
Author(s):  
Xiaohong Han ◽  
Jeffrey L. Jorgensen ◽  
Archana Brahmandam ◽  
Ellen Schlette ◽  
Yang O. Huh ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Flow Cytometry ◽  
Chronic Myelogenous Leukemia ◽  
Peripheral Blood ◽  
Myelogenous Leukemia ◽  
Multiparameter Flow Cytometry ◽  
Color Flow ◽  
Aberrant Expression ◽  
Flow Cytometric ◽  
Hla Dr

Abstract Context.—The immunophenotypic profile of basophils is not yet fully established, and the immunophenotypic changes in chronic myelogenous leukemia are not fully characterized. Objective.—To establish a comprehensive immunophenotypic spectrum of normal basophils and to assess the range of immunophenotypic aberrations of basophils in chronic myelogenous leukemia. Design.—Using 4-color flow cytometry, we compared the immunophenotypic profile of basophils in peripheral blood or bone marrow samples from 20 patients with no evidence of neoplasia to basophils from 15 patients with chronic myelogenous leukemia. Results.—Basophils in control cases were all positive for CD9, CD13, CD22, CD25 (dim), CD33, CD36, CD38 (bright), CD45 (dimmer than lymphocytes and brighter than myeloblasts), and CD123 (bright), and were negative for CD19, CD34, CD64, CD117, and HLA-DR. Basophils in all chronic myelogenous leukemia patients possessed 1 to 5 immunophenotypic aberrancies. The most common aberrancies were underexpression of CD38, followed by aberrant expression of CD64 and underexpression of CD123. CD34 and CD117 were present in cases with basophilic precursors. Myeloblasts showed a distinct immunophenotypic profile, as they typically expressed CD34 and CD117, showed dimmer expression (compared with basophils) of CD38, CD45, and CD123, and lacked expression of CD22. Conclusions.—Flow cytometric immunophenotyping can identify immunophenotypic aberrations of basophils in chronic myelogenous leukemia, and discriminate basophils from myeloblasts.

Fibrin monomer complex in normal pregnant women: a potential thrombotic marker in pregnancy

2007 ◽  
Vol 44 (5) ◽  
pp. 449-454 ◽  
Author(s):  
Hiroaki Onishi ◽  
Kimiko Kaniyu ◽  
Mitsutoshi Iwashita ◽  
Asashi Tanaka ◽  
Takashi Watanabe
Keyword(s):  
Pregnant Women ◽  
Late Pregnancy ◽  
Normal Pregnancy ◽  
Reference Ranges ◽  
Vein Thrombosis ◽  
Fibrin Monomer ◽  
Potential Marker ◽  
Deep Vein ◽  
Positive Results ◽  
In Pregnancy

Background: Pregnancy represents a major risk factor for deep vein thrombosis (DVT). Most coagulation/fibrinolysis markers currently utilized change during pregnancy, and therefore they cannot accurately evaluate thrombotic events in pregnancy because the rate of false positive results is high. Fibrin monomer complex (FMC) has recently become widely available for diagnosing DVT. The present study examined whether FMC is suitable for evaluating thrombotic status in pregnancy. Methods: Concentrations of FMC and other haemostatic markers were investigated in 87 pregnant women without major complications at early, mid- or late pregnancy. FMC concentrations were also measured in 127 normal non-pregnant women, and in one woman who developed DVT after delivery. Results: In normal pregnant women, FMC concentrations were unchanged during early or mid-pregnancy and slightly elevated during late pregnancy. Concentrations were within reference range in most cases, and none exceeded the cut-off value for DVT. In contrast, thrombin-antithrombin complex (TAT) and D-dimer (DD) concentrations were significantly elevated in late pregnancy, and median values exceeded reference ranges. The DVT case displayed significantly elevated FMC concentrations. Conclusions: Changes in FMC concentrations during normal pregnancy are minimal compared with other haemostatic markers. Because the rate of false positivity is lower, FMC could be a potential marker of thrombotic status in pregnancy rather than TAT and DD.

scholarly journals Interpretation of Modified Glucose Tolerance Test among Pregnant Malaysian Women

2020 ◽  
Vol 5 (08) ◽  
pp. 309-313
Author(s):  
Muna Kh. Al-kubaisi ◽  
Saad M. Al-Shibli ◽  
Nilar Win
Keyword(s):  
Glucose Tolerance ◽  
Pregnant Women ◽  
Blood Sample ◽  
Blood Sugar ◽  
Glucose Tolerance Test ◽  
Venous Blood ◽  
Tolerance Test ◽  
Oral Glucose ◽  
The Mean ◽  
Local Protocol

Aim: Is to find the mean and two standard deviation of the serum blood sugar among pregnant women while running the modified oral glucose tolerance test (MOGTT) as screening for gestational diabetes mellitus (GDM) & to compare the readings with other protocols adopted in diagnosing GDM. Method: A cross sectional study among pregnant women running routine MOGTT at 24-28 weeks’ gestation. A total of 149 women participated in 4 months period. The test included 5 ml of venous blood sample taken after fasting for 8 hours and a second blood sample 2 hours after having 200 ml of 75 g glucose solution within 10 minutes. Results: The mean for the fasting blood sugar is 4.32 mmol/L±0.52 making value of 2SD of 5.36 mmol/l. The mean of the 2 hours glucose level was 6.11mmol/l±1.38 making the 2SD value of 8.87 mmol/l. Conclusion: Our results for the 1st reading in MOGTT is near to the value of the local protocol in diagnosing GDM. The 2 hours postprandial reading in the local protocol is fairly low when compared with our findings & with guidelines of nearby communities.

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