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Hand1 gene replacement with Hand2 reveals overlap in function with unique occurrence of omphalocele and heart defects

ABSTRACT: Hand1 gene replacement with Hand2 reveals overlap in function with unique occurrence of omphalocele and heart defects

PROVIDER: PRJNA1275004 | ENA |

REPOSITORIES: ENA

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Hand1 gene replacement with Hand2 reveals overlap in function with unique occurrence of omphalocele and heart defects [Spatial Transcriptomics]

Project description:The bHLH transcription factors HAND1 and HAND2 are expressed in partially overlapping patterns during development. Studies have established evidence for significant functional redundancy between HAND1 and HAND2. To test redundancy fully, we engineered a Hand1 allele where we directly replace the exons and intron with those of Hand2. Results show that 2% of Hand1Hand2/ Hand2 mice are viable, and fertile. The remaining Hand1Hand2/Hand2 embryos exhibit neonatal lethality due to omphalocele, ventricular septal defects and conduction anomalies. Omphalocele can occur due to altered gut rotation and transcriptomic expression analysis reveals that established gene expression patterns associated with normal gut rotation are compromised. Interrogation of cardiac function in surviving Hand1Hand2/Hand2 mice reveals QRS abnormalities and accompanies cardiac morphogenic defects. These data support previous findings that HAND factors exhibit extensive functional overlap but do reveal that unique functions for HAND1 and HAND2 proteins within the Hand1 expression domain that are required for normal embryonic development.

2025-09-10 | GSE298742 | GEO

Hand1 gene replacement with Hand2 reveals overlap in function with unique occurrence of omphalocele and heart defects [scRNA-seq]

2025-09-10 | GSE299253 | GEO

Hand1 gene replacement with Hand2 reveals overlap in function with unique occurrence of omphalocele and heart defects [Spatial Transcriptomics]

Project description:Hand1 gene replacement with Hand2 reveals overlap in function with unique occurrence of omphalocele and heart defects [Spatial Transcriptomics]

| PRJNA1271041 | ENA

Hand1 gene replacement with Hand2 reveals overlap in function with unique occurrence of omphalocele and heart defects [scRNA-seq]

Project description:Hand1 gene replacement with Hand2 reveals overlap in function with unique occurrence of omphalocele and heart defects [scRNA-seq]

| PRJNA1273164 | ENA

Hand1 gene replacement with Hand2 reveals overlap in function with unique occurrence of omphalocele and heart defects

Project description:This SuperSeries is composed of the SubSeries listed below.

2025-09-10 | GSE299579 | GEO

Expression dynamics of HAND1/2 in in vitro human cardiomyocyte differentiation

Project description:Hand1 and Hand2 are transcriptional factors, and knockout mice of these genes show left and right ventricular hypoplasia, respectively. However, their function and expression in human cardiogenesis are not well studied. To delineate their expressions and assess their functions in human cardiomyocytes (CMs) in vitro, we established two triple reporter human induced pluripotent stem cell lines, HAND1mCherry, HAND2EGFP, with MYH6-driven iRFP670 or constitutive tagBFP expression and investigated their expression dynamics during cardiac differentiation. On day 5 of the differentiation, HAND1 expression marked cardiac progenitor cells. We profiled the CM subpopulations on day 20 with RNA-sequencing and found that mCherry+ CMs showed higher proliferative ability than mCherry- CMs and identified CD105 as a surface marker of highly proliferative CMs. Finally, we revealed that LEF1 is a key regulator of proliferation and is repressively regulated by HAND1 and HAND2.

2021-07-22 | GSE156394 | GEO

E11.5 Hand1 myocardial knockout RNA-Seq

Project description:Aims: To examine the role of the basic Helix-loop-Helix (bHLH) transcription factor HAND1 in embryonic and adult myocardium. Methods and Results: Hand1 is expressed within the cardiomyocytes of the left ventricle (LV) and myocardial cuff between embryonic days (E) 9.5-13.5. Hand gene dosage plays an important role in ventricular morphology and the contribution of Hand1 to congenital heart defects requires further interrogation. Conditional ablation of Hand1 was carried out using either Nkx2.5 knockin Cre (Nkx2.5Cre) or a-myosin heavy chain Cre (aMhc-Cre) driver. Interrogation of transcriptome data via Ingenuity Pathway Analysis (IPA) reveals several gene regulatory pathways disrupted including translation and cardiac hypertrophy-related pathways. Embryo and adult hearts were subjected to histological, functional and molecular analyses. Myocardial deletion of Hand1 results in morphological defects that include cardiac conduction system defects, survivable interventricular septal defects (VSDs), and abnormal LV papillary muscles (PM). Resulting Hand1 conditional mutants are born at Mendelian frequencies; but the morphological alterations acquired during cardiac development result in, the mice developing diastolic heart failure. Conclusions: Collectively, these data reveal that Hand1 contributes to the morphogenic patterning and maturation of cardiomyocytes during embryogenesis and although survivable, indicate a role for Hand1 conduction system and papillary morphogenesis.

2019-06-01 | GSE128571 | GEO

HAND1 Ubiquitination and Phosphorylation sites

Project description:pcDNA3-HAND1-his was transfected into HEK293T cells and harvested after 48 hours. IMAC was carried out under denaturing conditions to enrich for HAND1,and samples were loaded onto SDS-PAGE gel with HAND1 gel band excised and submitted to LC-MS/MS.

2020-12-18 | PXD022407 | Pride

HAND2 regulates regional chromation modification [HAND2-knockdown_histone_ChIPseq]

Project description:HAND2 regulates regional chromation modification [HAND2-knockdown_histone_ChIPseq]

| PRJNA762918 | ENA

Gene expression profiling of uterine stromal cells isolated from Hand2 floxed and Hand2 ablated mice on day 4 of pregnancy

Project description:Our previous study revealed that the basic helix-loop-helix transcription factor Hand2 is a downstream target of progesterone signaling in mouse uterine stroma at the time of implantation. Further, conditional deletion of Hand2 in mouse uterus leads to implantation failure due to impaired uterine epithelial receptivity. To identify the downstream targets of Hand2 in the uterus, we performed gene expression profling of uterine stromal cells isolated from Hand2-null mice and the corresponding controls on day4 of pregnancy (the time of implantation). The microarray results revealed elevated expression of mRNAs corresponding to several members of the fibroblast growth factor family in uterine stroma of Hand2-ablated mice. These factors act as paracrine mediators of mitogenic effects of estrogen on the epithleium. Thus, Hand2 is a critical regulator of the uteirne stromal-epithelial communication that directs proper steroid regulation conducive for establshment of pregnancy. We performed conditional ablation of Hand2 in the mouse uterus using the PRcre mouse model. As Hand2 expression is restricted to stromal comaprtment, we isolated uterine stromal cells from day4 pregnant mice (n=5 for each genotype), purified total RNA from these cells, pooled these samples and then hybridized to high density affymetrix microarrays. Control vs. KO.

2011-06-03 | E-GEOD-25881 | biostudies-arrayexpress

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