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Heat Shock Proteins and Small Nucleolar RNAs are Dysregulated in a Drosophila Model for Feline Hypertrophic Cardiomyopathy

ABSTRACT: Heat Shock Proteins and Small Nucleolar RNAs are Dysregulated in a Drosophila Model for Feline Hypertrophic Cardiomyopathy

PROVIDER: PRJNA593990 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10601400.fastq.gz	Fastqsanger.gz
	SRR10601401.fastq.gz	Fastqsanger.gz
	SRR10601402.fastq.gz	Fastqsanger.gz
	SRR10601403.fastq.gz	Fastqsanger.gz
	SRR10601404.fastq.gz	Fastqsanger.gz

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Project description:Practical relevanceHypertrophic cardiomyopathy (HCM) is the most common form of feline cardiomyopathy observed clinically and may affect up to approximately 15% of the domestic cat population, primarily as a subclinical disease. Fortunately, severe HCM, leading to heart failure or arterial thromboembolism (ATE), only occurs in a small proportion of these cats.Patient groupDomestic cats of any age from 3 months upward, of either sex and of any breed, can be affected. A higher prevalence in male and domestic shorthair cats has been reported.DiagnosticsSubclinical feline HCM may or may not produce a heart murmur or gallop sound. Substantial left atrial enlargement can often be identified radiographically in cats with severe HCM. Biomarkers should not be relied on solely to diagnose the disease. While severe feline HCM can usually be diagnosed via echocardiography alone, feline HCM with mild to moderate left ventricular (LV) wall thickening is a diagnosis of exclusion, which means there is no definitive test for HCM in these cats and so other disorders that can cause mild to moderate LV wall thickening (eg, hyperthyroidism, systemic hypertension, acromegaly, dehydration) need to be ruled out.Key findingsWhile a genetic cause of HCM has been identified in two breeds and is suspected in another, for most cats the cause is unknown. Systolic anterior motion of the mitral valve (SAM) is the most common cause of dynamic left ventricular outflow tract obstruction (DLVOTO) and, in turn, the most common cause of a heart murmur with feline HCM. While severe DLVOTO is probably clinically significant and so should be treated, lesser degrees probably are not. Furthermore, since SAM can likely be induced in most cats with HCM, the distinction between HCM without obstruction and HCM with obstruction (HOCM) is of limited importance in cats. Diastolic dysfunction, and its consequences of abnormally increased atrial pressure leading to signs of heart failure, and sluggish atrial blood flow leading to ATE, is the primary abnormality that causes clinical signs and death in affected cats. Treatment (eg, loop diuretics) is aimed at controlling heart failure. Preventive treatment (eg, antithrombotic drugs) is aimed at reducing the risk of complications (eg, ATE).ConclusionsMost cats with HCM show no overt clinical signs and live a normal or near-normal life despite this disease. However, a substantial minority of cats develop overt clinical signs referable to heart failure or ATE that require treatment. For most cats with clinical signs caused by HCM, the long-term prognosis is poor to grave despite therapy.Areas of uncertaintyGenetic mutations (variants) that cause HCM have been identified in a few breeds, but, despite valiant efforts, the cause of HCM in the vast majority of cats remains unknown. No treatment currently exists that reverses or even slows the cardiomyopathic process in HCM, again despite valiant efforts. The search goes on.

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Heat Shock Proteins and Small Nucleolar RNAs are Dysregulated in a Drosophila Model for Feline Hypertrophic Cardiomyopathy

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