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Potential Mechanism of Wavelength Defocus in Bidirectional Regulation of Refractive Development in Guinea Pigs

ABSTRACT: Potential Mechanism of Wavelength Defocus in Bidirectional Regulation of Refractive Development in Guinea Pigs

PROVIDER: PRJNA692095 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13435485_1.fastq.gz	Fastqsanger.gz
	SRR13435485_2.fastq.gz	Fastqsanger.gz
	SRR13435486_1.fastq.gz	Fastqsanger.gz
	SRR13435486_2.fastq.gz	Fastqsanger.gz
	SRR13435487_1.fastq.gz	Fastqsanger.gz

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Potential Mechanism of Wavelength Defocus in Bidirectional Regulation of Refractive Development in Guinea Pigs

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Project description:It has been demonstrated that males exposed to adversity prior to conception sire offspring exhibiting abnormal behaviour and neuroendocrine function. Epigenetic factors such as microRNA (miRNA) within sperm may be responsible for driving these effects. Synthetic glucocorticoids (sGC) are a class of drug that are commonly prescribed and may have implications for intergenerational transmission. Therefore, we hypothesized that caput and cauda sperm miRNA profiles will be altered following sGC exposure in guinea pigs. We used miRNA microarray to evaluate the miRNA levels of caput and cauda sperm isolated from guinea pigs exposed to control and water treated with sGC. We identified a subset of miRNAs with low levels in cauda sperm of guinea pigs exposed to sGC.

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Development of oligonucleotide microarray to study global gene expression profile in guinea pigs in response to tuberculosis infection

Project description:In this study we developed a guinea pig oligonucleotide microarray (GPOM) comprising of a total number of 45,220 features including 43,803 valid features from different mammalian species. These features are inclusive of 2971 newly annotated probes corresponding to 344 unique genes of guinea pig. As a case study, we utilized this array to examine the gene expression profile in guinea pig lungs in response to infection with Mycobacterium tuberculosis. Studying the global gene expression profile in guinea pigs allowed identification of the disease signature of pulmonary TB infection represented by several unique genes that are differentially regulated in this model. While, 1344 unique genes exhibited marked up regulation, 1856 genes were significantly down regulated. The newly developed tool not only finds its utility in studying the global gene expression profile associated with vaccination and/or M. tuberculosis infection in this highly useful animal model but would also be immensely useful in identification of new drug targets, testing of therapies, molecular genetic analysis for diseases other than tuberculosis as well. Genotypic Technology designed Custom Cavia porcellus 4x44k Gene Expression Array (Agilent-AMADID-019424) * In order to validate the GPOM developed in this study, we compared the gene expression profile of guinea pig lungs at 10 weeks post- M. tuberculosis infection with respect to that obtained from normal uninfected animals. To address this, guinea pigs were aerosol infected with M. tuberculosis, lungs were harvested at 10 weeks post-infection and RNA obtained from infected lungs was employed for cDNA synthesis and microarray hybridization. The gene expression was compared with the RNA sample obtained from the lungs of normal uninfected guinea pigs.

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Project description:Myopia has become the major cause of visual impairment worldwide. However, its retina-related pathogenesis remains unclear. In recent years, proteomics has become a high-throughput tool to explain biological mechanisms. In this study, we examined the retinas of guinea pigs with form deprivation myopia using 4D label-free proteomics and found disorders of retinal metabolism in experimental myopia.

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Genome-wide analysis of retinal transcriptome reveals common genetic network underlying perception of contrast and optical defocus detection

Project description:Refractive eye development is regulated by optical defocus in a process of emmetropization. Excessive exposure to negative optical defocus often leads to the development of myopia. However, it is still largely unknown how optical defocus is detected by the retina. Here, we used genome-wide RNA-sequencing (RNA-seq) to conduct analysis of the retinal genetic networks underlying contrast perception and refractive eye development. We report that the genetic network subserving contrast perception plays an important role in optical defocus detection and emmetropization. Our results demonstrate an interaction between contrast perception, the retinal circadian clock pathway and the signaling pathway underlying optical defocus detection. We also observe that the relative majority of genes causing human myopia are involved in the processing of optical defocus. Together, our results support the hypothesis that optical defocus is perceived by the retina using contrast as a proxy and provide new insights into molecular signaling underlying refractive eye development.

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Cavia porcellus breed:Hartley Guinea Pigs

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Evidence for the independent evolution of "functional progesterone withdrawal" in primates and guinea pigs: a comparative transcriptomic study

Project description:Cervix remodeling (CRM) is a critical process in preparation for parturition. Early cervix shortening is a powerful clinical predictor of preterm birth, and thus understanding how CRM is regulated is important for the prevention of prematurity. Humans and other primates differ from most other mammals by the maintenance of high levels of systemic progesterone concentrations and thus differ dramatically from most model species. Humans have been hypothesized to perform functional progesterone withdrawal (FPW), but the mechanisms of FPW are not known. Guinea pigs are similar to humans as they also maintain high progesterone concentrations through parturition. The aim of this study is to document gene expression during pregnancy in the guinea pig uterine cervix in order to assess whether guinea pig can be used as a model for human FPW Total RNA obtained from isolated cervical tissues from non-pregnant and two genstation stages (mid-term, and late-term but not in labor).

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