Additional file 9 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioniz…

2020

Additional file 9: Web Table 1B. Differentially expressed genes 4 h after exposure to low dose ionizing radiation (0.05 Gray).

Additional file 10 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioni…

2020

Additional file 10: Web Table 1C. Differentially expressed genes 2 h after exposure to high dose ionizing radiation (2 Gray).

Additional file 8 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioniz…

2020

Additional file 8: Web Table 1A. Differentially expressed genes 2 h after exposure to low dose ionizing radiation (0.05 Gray).

Humans and chimpanzees differ in their cellular response to DNA damage and non-coding sequence elements of DNA repair-associated genes.

2008

Compared to humans, chimpanzees appear to be less susceptible to many types of cancer. Because DNA repair defects lead to accumulation of gene and chromosomal mutations, species differences in DNA repair are one plausible explanation. Here we analyzed the repair kinetics of human and chimpanzee cells after cisplatin treatment and irradiation. Dot blots for the quantification of single-stranded (ss) DNA repair intermediates revealed a biphasic response of human and chimpanzee lymphoblasts to cisplatin-induced damage. The early phase of DNA repair was identical in both species with a peak of ssDNA intermediates at 1 h after DNA damage induction. However, the late phase differed between specie…

Δ133p53α enhances metabolic and cellular fitness of TCR-engineered T cells and promotes superior antitumor immunity

2021

BackgroundTumor microenvironment-associated T cell senescence is a key limiting factor for durable effective cancer immunotherapy. A few studies have demonstrated the critical role of the tumor suppressor TP53-derived p53 isoforms in cellular senescence process of non-immune cells. However, their role in lymphocytes, in particular tumor-antigen (TA) specific T cells remain largely unexplored.MethodsHuman T cells from peripheral blood were retrovirally engineered to coexpress a TA-specific T cell receptor and the Δ133p53α-isoform, and characterized for their cellular phenotype, metabolic profile and effector functions.ResultsPhenotypic analysis of Δ133p53α-modified T cells revealed a marked …

Haploinsufficiency of 16.4 Mb from chromosome 22pter-q11.21 in a girl with unilateral conductive hearing loss.

2009

We present the postnatal diagnosis of a de novo der(18)t(18;22)(p11.32;q11.21)pat, resulting in an unbalanced 45,XX,der (18)t(18;22) karyotype in a girl with conductive hearing loss on the left and ptosis of the right upper eye-lid. Unilateral ptosis was also observed in the patient’s 2 years and 8 months younger sister, who grows noticeably faster and appears to be a much quicker learner. After speech therapy the patient was eventually placed in normal school. The haploinsufficient 16.4-Mb region on chromosome 22pter→q11.21 contains 10 genes as well as many predicted genes, pseudogenes, and retrotransposed sequences with unknown functions. This observation may prove useful for prenatal dia…

Expression ofDNMT3A transcripts and nucleolar localization of DNMT3A protein in human testicular and fibroblast cells suggest a role for de novo DNA …

2006

Transcriptional silencing during differentiation of human male germ cells and serum starvation of human fibroblasts is controlled by epigenetic mechanisms that involve de novo DNA methylation. It is associated with high expression of different transcripts of the DNA methyltransferase 3A (DNMT3A) gene that encode two isoforms with de novo methyltransferase activity and one without catalytic activity. Western blots revealed that DNMT3A protein (with catalytic domain) is present at low levels in several tissues and at increased levels in testicular cells and growth-arrested fibroblasts. Immunofluorescence experiments localized DNMT3A to discrete nucleolar foci in B spermatogonia and resting fi…

Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ionizing radiation

2020

Abstract Background Exposure to ionizing radiation induces complex stress responses in cells, which can lead to adverse health effects such as cancer. Although a variety of studies investigated gene expression and affected pathways in human fibroblasts after exposure to ionizing radiation, the understanding of underlying mechanisms and biological effects is still incomplete due to different experimental settings and small sample sizes. Therefore, this study aims to identify the time point with the highest number of differentially expressed genes and corresponding pathways in primary human fibroblasts after irradiation at two preselected time points. Methods Fibroblasts from skin biopsies of…

Analysis of tombusvirus revertants to identify essential amino acid residues within RNA-dependent RNA polymerase motifs

2005

The RNA-dependent RNA polymerase (RdRp) of Tomato bushy stunt virus (TBSV) contains an arginine- and proline-rich (RPR) motif. This motif functions as an RNA-binding domain and is essential for tombusvirus replication. A mutant carrying three arginine substitutions in this motif rendered the virus unable to replicate in Nicotiana benthamiana plants and protoplasts. When the replicase function was provided in trans, by expressing the TBSV RdRp in N. benthamiana plants, an infectious variant could be isolated. Sequence analysis showed that only the substituted glycine residue (position 216) had reverted to arginine; all other substitutions remained unchanged. This finding suggested that stron…

CAF-like state in primary skin fibroblasts with constitutional BRCA1 epimutation sheds new light on tumor suppressor deficiency-related changes in he…

2016

Constitutive epimutations of tumor suppressor genes are increasingly considered as cancer predisposing factors equally to sequence mutations. In light of the emerging role of the microenvironment for cancer predisposition, initiation, and progression, we aimed to characterize the consequences of a BRCA1 epimutation in cells of mesenchymal origin. We performed a comprehensive molecular and cellular comparison of primary dermal fibroblasts taken from a monozygous twin pair discordant for recurrent cancers and BRCA1 epimutation, whose exceptional clinical case we previously reported in this journal. Comparative transcriptome analysis identified differential expression of extracellular matrix-r…

Expression of somatic DNA repair genes in human testes

2006

Meiosis is the key process for recombination and reduction of the diploid chromosome set to a haploid one. Many genes that have been found in yeast or mouse models to play a role in meiosis are also important for the repair of DNA damage in somatic cells. To study the DNA repair gene transcriptome during male germ cell development, we have developed a specialized cDNA microarray with 181 human genes which are involved in different somatic DNA repair pathways and/or cell cycle control and 45 control house-keeping genes. This DNA repair gene chip was used to quantify the mRNA expression levels in three human testes samples versus a fibroblast RNA pool. Two hundred twenty genes on the chip (in…

Searching for Gene Expression Differences in Primary Fibroblasts Between Patients with One and Two Neoplasms in Childhood

2012

Genetic factors are important for developing primary and subsequent malignancies in children. This study investigated the role of genetic factors involved in DNA-repair. Designed as a feasibility study, it addressed the possibility of obtaining samples for genetic analyses from former patients through the German Childhood Cancer Registry. Testing feasibility was as important as the biological question itself. We analyzed the expression of DNA-repair genes in untreated primary fibroblasts of 20 individuals with a second neoplasm compared to 20 matched single neoplasm cases using customized cDNA microarrays (1344 gene sequences, about 800 genes). Matching was by first neoplasm, age, and year …

Epigenetic dysregulation in the developing Down syndrome cortex

2016

Using Illumina 450K arrays, 1.85% of all analyzed CpG sites were significantly hypermethylated and 0.31% hypomethylated in fetal Down syndrome (DS) cortex throughout the genome. The methylation changes on chromosome 21 appeared to be balanced between hypo- and hyper-methylation, whereas, consistent with prior reports, all other chromosomes showed 3–11 times more hyper- than hypo-methylated sites. Reduced NRSF/REST expression due to upregulation of DYRK1A (on chromosome 21q22.13) and methylation of REST binding sites during early developmental stages may contribute to this genome-wide excess of hypermethylated sites. Upregulation of DNMT3L (on chromosome 21q22.4) could lead to de novo methyl…

Single-chain antibodies against a plant viral RNA-dependent RNA polymerase confer virus resistance.

2004

Crop loss due to viral diseases is still a major problem for agriculture today. We present a strategy to achieve virus resistance based on the expression of single-chain Fv fragments (scFvs) against a conserved domain in a plant viral RNA-dependent RNA polymerase (RdRp), a key enzyme in virus replication. The selected scFvs inhibited complementary RNA synthesis of different plant virus RdRps in vitro and virus replication in planta. Moreover, the scFvs also bound to the RdRp of the distantly related hepatitis C virus. T(1) and T(2) progeny of transgenic lines of Nicotiana benthamiana expressing different scFvs either in the cytosol or in the endoplasmic reticulum showed varying degrees of r…

Abstract 5504: Second neoplasms after childhood cancer and gene expression differences in primary fibroblasts

2012

Abstract Treatment of the primary neoplasm with radiotherapy or chemotherapy is an established risk factor for second neoplasms (SNs) after childhood cancer. As only a small percentage of the treated children suffer from SN, other shared risk factors must be involved. A predisposition for the occurrence of a SN might be a pre-existing somatic genetic defect associated with DNA repair. We investigated the association between gene expression involved in DNA-repair and the development of SNs after childhood cancer. Designed as a feasibility study this project addressed the possibility of obtaining samples for genetic analyses from former patients through the German Childhood Cancer Registry. W…

De novo t(12;17)(p13.3;q21.3) translocation with a breakpoint near the 5' end of the HOXB gene cluster in a patient with developmental delay and skel…

2007

A boy with severe mental retardation, funnel chest, bell-shaped thorax, and hexadactyly of both feet was found to have a balanced de novo t(12;17)(p13.3;q21.3) translocation. FISH with BAC clones and long-range PCR products assessed in the human genome sequence localized the breakpoint on chromosome 17q21.3 to a 21-kb segment that lies <30 kb upstream of the HOXB gene cluster and immediately adjacent to the 3′ end of the TTLL6 gene. The breakpoint on chromosome 12 occurred within telomeric hexamer repeats and, therefore, is not likely to affect gene function directly. We propose that juxtaposition of the HOXB cluster to a repetitive DNA domain and/or separation from required cis-regulatory …

Homozygous variants in the gene SCAPER cause syndromic intellectual disability

2019

The S-Phase Cyclin A Associated Protein In The ER (SCAPER) gene is a ubiquitously expressed gene with unknown function in the brain. Recently, biallelic SCAPER variants were described in four patients from three families with retinitis pigmentosa (RP) and intellectual disability (ID). Here, we expand the spectrum of pathogenic variants in SCAPER and report on 10 further patients from four families with ID, RP, and additional dysmorphic features carrying homozygous variants in SCAPER. The variants found comprise frameshift, nonsense, and missense variants as well as an intragenic homozygous deletion, which spans SCAPER exons 15 and 16 and introduces a frameshift and a premature stop codon. A…

Sequence-based bioinformatic prediction and QUASEP identify genomic imprinting of the KCNK9 potassium channel gene in mouse and human

2007

Genomic imprinting is the epigenetic marking of gene subsets resulting in monoallelic or predominant expression of one of the two parental alleles according to their parental origin. We describe the systematic experimental verification of a prioritized 16 candidate imprinted gene set predicted by sequence-based bioinformatic analyses. We used Quantification of Allele-Specific Expression by Pyrosequencing (QUASEP) and discovered maternal-specific imprinted expression of the Kcnk9 gene as well as strain-dependent preferential expression of the Rarres1 gene in E11.5 (C57BL/6 3 Cast/Ei)F1 and informative (C57BL/6 3 Cast/ Ei) 3 C57BL/6 backcross mouse embryos. For the remaining 14 candidate impr…

Sex-specific windows for high mRNA expression of DNA methyltransferases 1 and 3A and methyl-CpG-binding domain proteins 2 and 4 in human fetal gonads

2006

DNA methyltransferases (DNMTs) and 5-methyl-CpG-binding domain proteins (MBDs) are involved in the acquisition of parent-specific epigenetic modifications in human male and female germ cells. Reverse Northern blot analyses demonstrated sex-specific differences in mRNA expression for the maintenance DNMT1 and the de novo DNMT3A in developing testis and ovary. In fetal testis DNMT1 and DNMT3A expression peaked in mitotically arrested spermatogonia around 21 weeks gestation. In fetal ovary transcriptional upregulation of DNMT1 and DNMT3A occurred during a very brief period at 16 weeks gestation, when the oocytes proceeded through meiotic prophase. Fetal gonads showed several fold higher DNMT3A…

Isolation and differential expression of two isoforms of the ROBO2/Robo2 axon guidance receptor gene in humans and mice.

2006

AbstractExpression of Robo receptor molecules is important for axon guidance across the midline of the mammalian central nervous system. Here we describe novel isoform a of human ROBO2, which is initially strongly expressed in the fetal human brain but thereafter only weakly expressed in adult brain and a few other tissues. The known isoform b of ROBO2 shows a more or less ubiquitous expression pattern, suggesting diverse functional roles. The genomic structure and distinct expression patterns of Robo2a and Robo2b have been conserved in the mouse, but in contrast to human ROBO2a mouse Robo2a is also abundant in adult brain. Exons 1 and 2 of human ROBO2a lie in an inherently unstable DNA seg…

Microarray mRNA expression analysis of Fanconi anemia fibroblasts.

2007

Fanconi anemia (FA) cells are generally hypersensitive to DNA cross-linking agents, implying that mutations in the different &lt;i&gt;FANC&lt;/i&gt; genes cause a similar DNA repair defect(s). By using a customized cDNA microarray chip for DNA repair- and cell cycle-associated genes, we identified three genes, cathepsin B (&lt;i&gt;CTSB&lt;/i&gt;), glutaredoxin (&lt;i&gt;GLRX&lt;/i&gt;), and polo-like kinase 2 (&lt;i&gt;PLK2&lt;/i&gt;), that were misregulated in untreated primary fibroblasts from three unrelated FA-D2 patients, compared to six controls. Quantitative real-time RT PCR was used to validate these results and to study possible molecular links between FA-D2 and other FA subtypes.…

Spontaneous and Radiation-Induced Chromosome Aberrations in Primary Fibroblasts of Patients With Pediatric First and Second Neoplasms

2020

Frontiers in oncology 10, 1338 (2020). doi:10.3389/fonc.2020.01338

Novel clinical findings in the first Egyptian case of Sotos syndrome caused by complete deletion of theNSD1gene

2017

Additional file 2 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioniz…

2020

Additional file 2: Web Figure 7. Shared pathways from low and high dose ionizing radiation experiments. Gy = Gray. Web Figure 8. Pathways only affected in high dose ionizing radiation experiments. Gy = Gray.

Additional file 3 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioniz…

2020

Additional file 3: Web Figure 9. Predicted downsteam diseases and functions. Web Figure 10. Predicted upstream regulators. LDIR = Low dose of ionizing radiation (0.05 Gray), HDIR = High dose of ionizing radiation (2 Gray).

Additional file 1 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioniz…

2020

Additional file 1: Web Figure 1. Representative measurements of the cell cycle distribution of HOECHST33258-stained fibroblasts by flow cytometry during (A) log-phase growth or (B) after G0/1 synchronization over 14 days for radiation experiments. Web Figure 2. Total number of differentially expressed genes in human fibroblasts from cancer free-controls at 0.25 h, 2 h and 24 h after exposure to low (0.05 Gray (Gy)) or high dose (2Gy) of X-rays compared to unirradiated fibroblasts (N = 3). Web Figure 3. Correlation of RNA quality metrics (RIN, Qbit RNA-concentration), expression variation (PC1–3) and number of aligned reads (aligned reads, aligned reads normalized) for all experiments. The c…

Additional file 5 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioniz…

2020

Additional file 5: Web Figure 12. Comparison of predicted downstream diseases and functions in different data sets.

Additional file 6 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioniz…

2020

Additional file 6: Web Figure 13. Comparison of predicted upstream regulators in different data sets.

Additional file 7 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioniz…

2020

Additional file 7: Gene expression in the "Not a Number" pathways (blue = downregulation, red = upregulation). Web Figure 14. Base excision repair (BER) system. Web Fig. 15. Molecular mechanisms of cancer. Web Fig. 16. Assembly of RNA polymerase III complex. Web Fig. 17. DNA double-strand break repair by homologous recombination. Web Fig. 18. Interleukin 4 (IL-4) signaling. Web Fig. 19. Interleukin 17 (IL-17) signaling. Web Fig. 20. Interleukin 17A (IL-17A) signaling in fibroblasts. Web Fig. 21. Mitochondrial dysfunction. Web Fig. 22. Myc mediated apoptosis signaling. Web Fig. 23.Nucleotide excision repair. Web Fig. 24. Protein ubiquitination. Web Fig. 25. Retinoic acid receptor (RAR) activ…

Additional file 4 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioniz…

2020

Additional file 4: Web Figure 11. Comparison of affected pathways in different data sets.

Additional file 11 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioni…

2020

Additional file 11: Web Table 1D. Differentially expressed genes 4 h after exposure to high dose ionizing radiation (2 Gray).

Additional file 12 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioni…

2020

Additional file 12: Web Table 2. Differential expression activity in cellular pathways and involved molecules

Additional file 13 of Comparison of time and dose dependent gene expression and affected pathways in primary human fibroblasts after exposure to ioni…

2020

Additional file 13: Supplement file 1. Settings for comparison analyses in IPA.