TfR1 globally regulates transcription and alternative splicing
Ontology highlight
ABSTRACT: In the current study, to figure out the regulation pattern of TfR1, we knocked down TFRC expression level by shRNA in HeLa cells. RNA-sequencing (RNA-seq) was used to analyze the global transcript level and alternative splicing (AS) on knockdown-treated (KD) and normal control (NC) cell samples. 629 differentially expressed genes (DEGs) were identified between OE and NC, and Gene ontology (GO) and KEGG analysis for DEGs were carried out. It was found that multiple DEGs were involved in O-glycan processing, protein modification, response to hypoxia and ATP catabolic process, indicating the down-regulated expression of TfR1 extensively disturbed cell physiology.
Project description:The transferrin receptor 1 (TfR1), encoded by TFRC gene, is the gatekeeper of cellular iron uptake for cells. A variety of molecular mechanisms are at work to tightly regulate TfR1 expression, and abnormal TfR1 expression was associated with diseases. In the current study, to figure out the regulation pattern of TfR1, we cloned and overexpressed human TFRC gene in HeLa cells. RNA-sequencing (RNA-seq) was used to analyze the global transcript level on overexpression-treated (OE) and normal control (NC) cell samples. 1669 differentially expressed genes (DEGs) were identified between OE and NC, and Gene ontology (GO) analysis for DEGs were carried out. It was found that lots of DEGs were associated with ion transmembrane transport and immunity. Moreover, the network was constructed on basis of DEGs regulating ion transport and immunity, the results revealed that TFRC was the node gene of the network, further suggesting that precisely controlled TfR1 expression might be not only essential for iron homeostasis, but also globally important for cell physiology, including ion transport and immunity.
Project description:Tfr1 is important for iron uptake in red blood cells. We deleted Tfr1 in skeletal muscle to determine the role of Tfr1 in iron uptake in skeletal muscle. We used microarrays to identify global gene changes associated with deletion of Tfr1 in skeletal muscle
Project description:We deleted Tfr1 in the heart to determine the role of Tfr1 in iron uptake in normal cardiac funciton We used microarrays to identify global gene changes associated with deletion of Tfr1 in skeletal muscle We isolated RNA from WT and Tfr1 KO hearts at both postnatal day 5 and postnatal day 10.RNA was labaled and hibridized to Affymetrics microarrays.
Project description:We deleted Tfr1 in the heart to determine the role of Tfr1 in iron uptake in normal cardiac funciton We used microarrays to identify global gene changes associated with deletion of Tfr1 in skeletal muscle
Project description:Tfr1 is important for iron uptake in red blood cells. We deleted Tfr1 in skeletal muscle to determine the role of Tfr1 in iron uptake in skeletal muscle. We used microarrays to identify global gene changes associated with deletion of Tfr1 in skeletal muscle We used skeletal muscle and liver from wild type and Tfr1 skeletal muscle KO mice at postnatal day 5 and postnatal day 9. mRNA was extracted from the tissues, labaled and hibridized to Affymetrics microarrays.
Project description:H-ferritin (HFn) nanocarrier is emerging as a promising theranostic platform for tumor diagnosis and therapy, which can specifically target tumor cells via binding transferrin receptor 1 (TfR1). This led us to investigate the therapeutic function of TfR1 in GC. The clinical significance ofTfR1 was assessed in 178 GC tissues using a magneto-HFn nanoparticle-based immunohistochemistry method. Therapeutic effects of doxorubicin-loaded HFn nanocarriers evaluated on TfR1 positive GC patient-derived xenograft (GC-PDX) models. The biological function of TfR1 was investigated through in vitro and in vivo assays. TfR1 was upregulated (73.03%) in GC tissues and reversely correlated with patient outcome. TfR1 negative sorted cells exhibited tumor-initiating feature, which enhanced tumor formation in vitro and in vivo, migration/invasion, whereas TfR1 positive sorted cells showed significant proliferation ability. Knockout of TfR1 in GC cells also enhanced cell invasion. TfR1 deficient cells displayed immune escape by upregulating PD-L1, CXCL9 and CXCL10, when disposed by IFN-γ. Western blot results demonstrated that knockout of TfR1 in GC cells upregulated Akt and STAT3 signaling. Moreover, in TfR1 positive GC-PDX models, HFn-Dox group significantly inhibited tumor growth and increased mouse survival compared with that of free-Dox group. TfR1 could be a potential prognostic and therapeutic biomarker for GC: (i) TfR1 reversely correlated with patient outcome and its negative cells possess tumor aggressive features; (ii) TfR1 positive cells can be killed by H-ferritin nanocarrier. Given the heterogeneity of GC, HFn nanocarrier combined with other therapies towards TfR1 negative cells (such as: small molecule or immunotherapy etc.) will be new options for GC treatment.
Project description:It is well-known that p53-mediated gene regulation exerts a profound impact on the occurrence, progression, metastasis, and various other facets of tumor. Wherein, activation of p53 downstream DNA damage repair-related genes is able to promote the survival of cancer cells during tumor progression.Notably, it has been substantiated that the transcriptional activity of p53 could be modulated by interactions with other proteins.Therefore, we asked whether the interaction with TfR1 was relevant to the transcriptional regulation of p53 target genes. Our results support the positive regulation of nuclear TfR1 on DNA damage repair-related genes, especially for the NER pathway.
Project description:It is well-known that p53-mediated gene regulation exerts a profound impact on the occurrence, progression, metastasis, and various other facets of tumor. Wherein, activation of p53 downstream DNA damage repair-related genes is able to promote the survival of cancer cells during tumor progression.Notably, it has been substantiated that the transcriptional activity of p53 could be modulated by interactions with other proteins.Therefore, we asked whether the interaction with TfR1 was relevant to the transcriptional regulation of p53 target genes. Our results support the positive regulation of nuclear TfR1 on DNA damage repair-related genes, especially for the NER pathway.
Project description:Transferrin receptor 1 (TfR1) is an attractive target for cancer immunotherapy due to its overexpression and central role in cancer pathology. Although antibodies targeting TfR1 have shown promise against malignancies, their efficacy is variable. The current work aims to elucidate the mechanism of sensitivity and resistance to treatment with an anti-TfR antibody fusion protein (ch128.1Av) using as models two malignant B-cell lines: the sensitive cell line IM-9 and the tolerant cell line U266. Keywords: Time course analysis