scholarly journals High mobility group box 1 protein polymorphism affects susceptibility to recurrent pregnancy loss by up-regulating gene expression in chorionic villi

2015 ◽  
Vol 32 (7) ◽  
pp. 1123-1128 ◽  
Author(s):  
Hua Jin ◽  
Jie Wu ◽  
Qiuhong Yang ◽  
Yan Cai ◽  
Wenxiu He ◽  
...  
Keyword(s):  
Gene Expression ◽  
Pregnancy Loss ◽  
Recurrent Pregnancy Loss ◽  
High Mobility ◽  
High Mobility Group ◽  
Protein Polymorphism ◽  
Chorionic Villi

Comparison of gene expression at the feto–maternal interface between normal and recurrent pregnancy loss patients

2002 ◽  
Vol 14 (4) ◽  
pp. 235 ◽  
Author(s):  
Kwang-Hyun Baek ◽  
Bum Chae Choi ◽  
Jin-Hie Lee ◽  
Hee-Kyung Choi ◽  
Sook-Hwan Lee ◽  
...  
Keyword(s):  
Gene Expression ◽  
Pregnancy Loss ◽  
Recurrent Pregnancy Loss ◽  
Expression Patterns ◽  
Subtractive Hybridization ◽  
Normal Pregnancy ◽  
Chorionic Villi ◽  
Expression Of Genes ◽  
Different Levels ◽  
In Pregnancy

—Normal pregnancy requires a series of immunological, metabolic, vascular and endocrine regulating processes. However, the specific genes and proteins involved in these processes are not well defined. Aberration of these processes may lead to problems in pregnancy. One of these problems may be recurrent pregnancy loss (RPL). Little information is available on the level of expression of genes that may play a role in normal pregnancy. Therefore, this study determined whether different levels of gene expression at the feto-maternal interface could be associated with factors for RPL. The expression patterns of genes isolated from subtractive hybridization analysis performed with chorionic villi from normal and abnormal pregnancies were investigated. Eight genes classified into groups, including immunosuppression-related, embryo attachment-related and angiogenesis-related, were isolated.

scholarly journals The effect of vitamin C on the gene expression profile of sperm protamines in the male partners of couples with recurrent pregnancy loss: A randomized clinical trial

2020 ◽  
Vol 47 (1) ◽  
pp. 68-76
Author(s):  
Saeideh Hamidian ◽  
Ali Reza Talebi ◽  
Farzaneh Fesahat ◽  
Mohammad Bayat ◽  
Ali Mohammad Mirjalili ◽  
...  
Keyword(s):  
Gene Expression ◽  
Vitamin C ◽  
Pregnancy Loss ◽  
Recurrent Pregnancy Loss ◽  
Sperm Chromatin ◽  
Dna Integrity ◽  
Male Partners ◽  
Expression Levels ◽  
Before And After ◽  
Vitamin C Supplementation

Objective: Since sperm abnormalities are known to be a major reason for recurrent pregnancy loss (RPL), any defects in DNA structure and chromatin condensation can place embryos at risk in the early stage of development and implantation. As antioxidants such as vitamin C may play a protective role against the destruction of protamine genes in sperm chromatin, this study was conducted to evaluate the effects of vitamin C on chromatin and the expression of protamine genes in the male partners of couples with RPL.Methods: Twenty male partners of couples with RPL were selected as the intervention group and received vitamin C supplementation (250 mg daily for 3 months). Healthy fertile men (n=20) were included as controls. Sperm chromatin, DNA integrity, and the expression levels of protamine genes were evaluated before and after treatment.Results: Significant differences were found in sperm morphology, protamine deficiency, and apoptosis between the two groups and before and after vitamin C administration. A significant change was found in mRNA levels of <i>PRM1, PRM2</i>, and the <i>PRM1/PRM2</i> ratio after treatment.Conclusion: Daily oral administration of vitamin C may improve human sperm parameters and DNA integrity by increasing protamine gene expression levels in the male partners of couples with RPL. The beneficial effects of vitamin C supplementation as an antioxidant for the male partners of couples with RPL could lead to improved pregnancy outcomes in these cases.

High mobility group A1 (HMGA1) protein and gene expression correlate with ER-negativity and poor outcomes in breast cancer

2019 ◽  
Vol 179 (1) ◽  
pp. 25-35 ◽  
Author(s):  
Mikhail Gorbounov ◽  
Neil M. Carleton ◽  
Rebecca J. Asch-Kendrick ◽  
Lingling Xian ◽  
Lisa Rooper ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Gene Expression ◽  
High Mobility ◽  
High Mobility Group ◽  
Poor Outcomes

scholarly journals Gene Expression Profiling Reveals Progesterone-Mediated Cell Cycle and Immunoregulatory Roles of Hoxa-10 in the Preimplantation Uterus

2003 ◽  
Vol 17 (4) ◽  
pp. 610-627 ◽  
Author(s):  
Mylene W. M. Yao ◽  
Hyunjung Lim ◽  
Daniel J. Schust ◽  
Sung E. Choe ◽  
Anna Farago ◽  
...  
Keyword(s):  
Gene Expression ◽  
Cell Proliferation ◽  
Gene Expression Profiling ◽  
Expression Profiling ◽  
Pregnancy Loss ◽  
Stromal Cell ◽  
Recurrent Pregnancy Loss ◽  
Kinase Inhibitor ◽  
Cyclin Dependent Kinase Inhibitor ◽  
Local Immunosuppression

Abstract Human infertility and recurrent pregnancy loss caused by implantation defects are poorly understood. Hoxa-10-deficient female mice have severe infertility and recurrent pregnancy loss due to defective uterine implantation. Gene expression profiling experiments reveal that Hoxa-10 is an important regulator of two critical events in implantation: stromal cell proliferation and local immunosuppression. At the time of implantation, Hoxa-10 mediates the progesterone-stimulated proliferation of uterine stromal cells. Hoxa-10 mutants express a stromal cell proliferation defect that is accompanied by quantitative or spatial alterations in the expression of two cyclin-dependent kinase inhibitor genes, p57 and p15. Hoxa-10 deficiencyFS also leads to a severe local immunological disturbance, characterized by a polyclonal proliferation of T cells, that occurs in place of the normal progesterone-mediated immunosuppression in the periimplantation uterus.

scholarly journals Functional roles of the transcription factor Oct-2A and the high mobility group protein I/Y in HLA-DRA gene expression.

1995 ◽  
Vol 182 (2) ◽  
pp. 487-500 ◽  
Author(s):  
S A Abdulkadir ◽  
S Krishna ◽  
D Thanos ◽  
T Maniatis ◽  
J L Strominger ◽  
...  
Keyword(s):  
Gene Expression ◽  
Transcription Factor ◽  
B Cells ◽  
B Cell ◽  
Cell Lines ◽  
High Mobility ◽  
High Mobility Group ◽  
High Mobility Group Protein ◽  
Ifn Gamma ◽  
Group Protein

The class II major histocompatibility complex gene HLA-DRA is expressed in B cells, activated T lymphocytes, and in antigen-presenting cells. In addition, HLA-DRA gene expression is inducible in a variety of cell types by interferon-gamma (IFN-gamma). Here we show that the lymphoid-specific transcription factor Oct-2A plays a critical role in HLA-DRA gene expression in class II-positive B cell lines, and that the high mobility group protein (HMG) I/Y binds to multiple sites within the DRA promoter, including the Oct-2A binding site. Coexpression of HMG I/Y and Oct-2 in cell lines lacking Oct-2 results in high levels of HLA-DRA gene expression, and in vitro DNA-binding studies reveal that HMG I/Y stimulates Oct-2A binding to the HLA-DRA promoter. Thus, Oct-2A and HMG I/Y may synergize to activate HLA-DRA expression in B cells. By contrast, Oct-2A is not involved in the IFN-gamma induction of the HLA-DRA gene in HeLa cells, but antisense HMG I/Y dramatically decreases the level of induction. We conclude that distinct sets of transcription factors are involved in the two modes of HLA-DRA expression, and that HMG I/Y may be important for B cell-specific expression, and is essential for IFN-gamma induction.

scholarly journals HMGA Genes and Proteins in Development and Evolution

2020 ◽  
Vol 21 (2) ◽  
pp. 654 ◽  
Author(s):  
Robert Vignali ◽  
Silvia Marracci
Keyword(s):  
Gene Expression ◽  
Cell Biology ◽  
Evolutionary Biology ◽  
High Mobility ◽  
High Mobility Group ◽  
Present Review ◽  
Regulatory Factors ◽  
Group A ◽  
Shed Light ◽  
Development And Evolution

HMGA (high mobility group A) (HMGA1 and HMGA2) are small non-histone proteins that can bind DNA and modify chromatin state, thus modulating the accessibility of regulatory factors to the DNA and contributing to the overall panorama of gene expression tuning. In general, they are abundantly expressed during embryogenesis, but are downregulated in the adult differentiated tissues. In the present review, we summarize some aspects of their role during development, also dealing with relevant studies that have shed light on their functioning in cell biology and with emerging possible involvement of HMGA1 and HMGA2 in evolutionary biology.

P–555 Recurrent pregnancy loss is associated with changes in the pre-pregnant endometrial gland transcriptome

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
J Pearson-Farr ◽  
R Lewis ◽  
J Cleal ◽  
Y Cheong
Keyword(s):  
Gene Expression ◽  
Observational Study ◽  
Differential Gene Expression ◽  
Pregnancy Loss ◽  
Recurrent Pregnancy Loss ◽  
Small Sample ◽  
Specific Cell ◽  
Endometrial Gland ◽  
Egg Donor ◽  
Differential Gene

Abstract Study question Do endometrial gland factors influence recurrent pregnancy loss? Summary answer The endometrial gland transcriptome during the window of implantation is altered in women with recurrent pregnancy loss compared to controls. What is known already Secretions from endometrial glands contribute to the uterine environment that supports the attachment and implantation of the embryo in early pregnancy. Studies have attempted to identify an endometrial gene expression pattern associated with recurrent pregnancy loss however, the cellular heterogeneity within the endometrium may obscure important differences in specific cell populations. Study design, size, duration An observational study comparing controls and women with recurrent pregnancy loss. Participants/materials, setting, methods Endometrial samples were collected during the implantation period of the menstrual cycle from five matched participant egg donor controls and women with recurrent pregnancy loss. Endometrial glands were isolated from fresh endometrial biopsies and RNA sequencing was performed. A differential gene expression analysis and a gene ontology enrichment analysis was performed between egg donor controls and women with recurrent pregnancy loss. Main results and the role of chance This study reports a glandular epithelium specific gene expression profile and demonstrates differential gene expression of endometrial glands from women with recurrent pregnancy loss compared to controls. 18 genes were upregulated and 1 gene was downregulated in the endometrial glands from women with recurrent pregnancy loss compared to controls (5% false discovery rate). Biological processes which contain genes that were differentially expressed in women with recurrent pregnancy loss compared to controls include epithelial cell migration and regulation of secretion by the cell. Limitations, reasons for caution This is an observational study with a relatively small sample size. Wider implications of the findings: This study identified differences in gene expression in women with recurrent pregnancy loss that are specifically associated with endometrial glands rather than endometrium as a whole. These differences could be used to identify a perturbed endometrium, isolate causes of recurrent pregnancy loss and develop targeted therapies. Trial registration number Not applicable

scholarly journals High-mobility-group A1 (HMGA1) proteins down-regulate the expression of the recombination activating gene 2 (RAG2)

2005 ◽  
Vol 389 (1) ◽  
pp. 91-97 ◽  
Author(s):  
Sabrina BATTISTA ◽  
Monica FEDELE ◽  
Josefina Martinez HOYOS ◽  
Francesca PENTIMALLI ◽  
Giovanna Maria PIERANTONI ◽  
...  
Keyword(s):  
Gene Expression ◽  
Embryonic Stem ◽  
High Mobility ◽  
Cell Development ◽  
Embryoid Bodies ◽  
High Mobility Group ◽  
Malignant Tumours ◽  
Rag2 Gene ◽  
Hmga1 Expression

HMGA1 (high-mobility-group A1) proteins are architectural transcription factors that are found overexpressed in embryogenesis and malignant tumours. We have shown previously that they have a role in lymphopoiesis, since the loss of HMGA1 expression leads to an impairment of T-cell development and to an increase in B-cell population. Since RAGs (recombination activating genes) are key regulators of lymphoid differentiation, in the present study we investigate whether RAG2 expression is dependent on HMGA1 activity. We show that RAG2 gene expression is up-regulated in Hmga1−/− ES (embryonic stem) cells and EBs (embryoid bodies) as well as in yolk sacs and fibroblasts from Hmga1−/− mice, suggesting that HMGA1 proteins control RAG2 gene expression both in vitro and in vivo. We show that the effect of HMGA1 on RAG2 expression is direct, identify the responsible region in the RAG2 promoter and demonstrate binding to the promoter in vivo using chromatin immunoprecipitation. Since RAG2 is necessary for lymphoid cell development, our results suggest a novel mechanism by which HMGA1 might regulate lymphoid differentiation.

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