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Abstract Objective: Senescence has been described as a stable cell proliferation arrest resulting from the progression of primary human fibroblasts through a finite number of population doublings in vitro. Accelerated telomere shortening was observed in pregnancies complicated by intrauterine growth restriction (IUGR), in placentas of diabetic mothers, and trisomy 21 amniocytes. We hypothesized that under conditions of stress, telomeres in placentas will be shorter and there will be more cells with the senescence phenotype. Methods: The two study groups included placental biopsies from 7 cases of trisomy 21and amniocytes from 10 cases of trisomy 21. The control groups consisted of placental biopsies from 6 cases and amniocytes from 10 pregnancies with a normal karyotype. The samples were analyzed for the presence of senescent cells based on the number of fragments in each cell. Results: A significantly higher percentage of cells in the senescent state, based on a higher percentage of cells with more fragmentations, were found in the amniocytes (20.8%) and in trophoblasts (94.3%) from placentas with trisomy 21 compared to the control groups. Conclusion: Among other genetic instability parameters, trisomy 21 amniocytes and trophoblasts express a higher prevalence of senescent cells than were previously reported.
Genetics Institute, Meir Medical Center, Kfar Saba, Israel.
This article was published in the following journal.
Cytoplasmic vacuolization in amniocytes reportedly is specific to gastroschisis, but documentation is anecdotal. To test this point, we compared 47 placentas from documented cases of gastroschisis to ...
We evaluated performance characteristics of a laboratory-developed, non-invasive prenatal screening (NIPS) assay for fetal aneuploidies. This assay employs massively parallel shotgun sequencing with f...
The association between infection and inflammatory response in singleton preterm birth (PTB) is well established, yet, less is known about PTB in twins. We aimed to compare the placental component and...
Little is known about the obstetric care of an ongoing pregnancy with trisomy 21. We sought to ascertain an obstetric profile for pregnancies with Down syndrome to help guide antenatal management.
The overall significance of this study is to develop a laboratory developed test (LDT) to use a new marker in the maternal blood to better identify pregnancies that have a child with a chr...
The objective of this project is to develop a non-invasive prenatal diagnostic test for trisomy 21 which is reliable, sensitive and cost-effective, and thus, offers an alternative to the c...
The aim of the study is to investigate the impact of Anti-Thymocyte Globulin (ATG) on immune senescence. Markers of immune senescence expression is assessed in a prospective cohort of rena...
Whole blood samples will be collected from high-risk pregnant women to validate the clinical performance of the SEQureDx Trisomy 21 Test.
Demonstrate that the High output shotgun sequencing of the foetal DNA in the maternal blood could allow a complete discrimination between the mothers of a trisomic fetus 21 or a DISOMIQUE ...
The 46,XX gonadal dysgenesis may be sporadic or familial. Familial XX gonadal dysgenesis is transmitted as an autosomal recessive trait and its locus was mapped to chromosome 2. Mutation in the gene for the FSH receptor (RECEPTORS, FSH) was detected. Sporadic XX gonadal dysgenesis is heterogeneous and has been associated with trisomy-13 and trisomy-18. These phenotypic females are characterized by a normal stature, sexual infantilism, bilateral streak gonads, amenorrhea, elevated plasma LUTEINIZING HORMONE and FSH concentration. The syndrome is sometimes called "pure gonadal dysgenesis," but this designation may also refer to gonadal dysgenesis with a 46,XY karyotype (GONADAL DYSGENESIS, 46,XY).
Changes in the organism associated with senescence, occurring at an accelerated rate.
The possession of a third chromosome of any one type in an otherwise diploid cell.
Physicians specializing in physiological and pathological aspects of aging and the aged, including the clinical problems of senescence and senility.
The branch of medicine concerned with the physiological and pathological aspects of the aged, including the clinical problems of senescence and senility.
Diabetes is a lifelong condition that causes a person's blood sugar level to become too high. The two main types of diabetes are: type 1 diabetes type 2 diabetes In the UK, diabetes affects approximately 2.9 million people. There are a...
Stress is caused by your perception of situations around you and then the reaction of your body to them. The automatic stress response to unexpected events is known as 'fight or flight'. Discovered by Walter Cannon in 1932, it is the release of h...