The association between lunar phase and intracranial aneurysm rupture: Myth or reality? Own data and systematic review

Histone deacetylase 9 inhibition upregulates microRNA-92a to repress the progression of intracranial aneurysm via silencing Bcl-2-like protein 11

OBJECTIVE

Histone deacetylases (HDACs) have been revealed to be involved in cerebrovascular diseases, while the role of HDAC9 in intracranial aneurysm (IA) remains seldom studied. We aim to explore the role of the HDAC9/microRNA-92a (miR-92a)/Bcl-2-like protein 11 (BCL2L11) axis in IA progression.

METHODS

Expression of HDAC9, miR-92a and BCL2L11 in IA tissues was assessed. IA rat models were established by ligation of left renal artery and common carotid artery, and the rats were respectively injected with relative plasmid vectors and/or oligonucleotides. The blood pressure was measured to estimate the IA degree, and the pathological changes were observed. The expression of matrix metalloproteinase (MMP)-2, MMP-9 and vascular endothelial growth factor (VEGF) was detected, and the levels of inflammatory factors were evaluated. Expression of apoptosis-related proteins, HDAC9, miR-92a and BCL2L11 was assessed.

RESULTS

HDAC9 and BCL2L11 were upregulated while miR-92a was downregulated in IA clinical samples and rat models. HDAC9 inhibition or miR-92a elevation improved pathological changes and repressed apoptosis and expression of MMP-2, MMP-9, VEGF and inflammatory factors in vascular tissues from IA rats. Oppositely, HDAC9 overexpression or miR-92a reduction had contrary effects. miR-92a downregulation reversed the effect of silenced HDAC9 on IA rats.

CONCLUSION

HDAC9 inhibition upregulates miR-92a to repress the progression of IA via silencing BCL2L11.

The influence of quotations uttered in emergency service triage traffic and hospitalization (Quiet)

This study aims to determine whether the use of the word, Quiet increases veterinary emergency service triage traffic or hospital admissions. Days were randomized to be a control or test phrase day. On control days, the phrase, Have a nice day! was announced to the entire hospital staff. On test days, the phrase, Have a quiet day! was announced. No statistical difference in mean number of the patients presenting to the emergency service for triage (test phrase 30.1 ± 10.4 cases vs control phrase 30.3 cases ± 10.5, p = 0.91) or hospital admissions (test phrase 3.5 ± 1.9 cases vs control phrase 4.3 ± 2.4 cases, p = 0.13) was found for 24-h following phrase utterance. No statistical difference in mean number of patients presenting to the emergency service for triage (test phrase 2.7 ± 1.4 cases vs control phrase 2.6 ± 1.9 cases, p = 0.84) or hospital admissions (test phrase 0.3 ± 0.5 cases vs control phrase 0.5 ± 0.8 cases, p = 0.08) was found in the 2-h window immediately following phrase announcement. Despite popular myth, using the word, Quiet does not increase veterinary emergency service triage traffic or hospital admissions.