PubMed: 30663117

Title
New insights into the role of microRNAs and long noncoding RNAs in most common neurodegenerative diseases.
Journal
Journal of cellular biochemistry
Volume
120
Issue
None
Pages
8908-8918
Date
2019-06-01
Authors
Ahmadi-Ahangar A | Maniati M | Tehrani SS | Yousefi T | Maniati MS

Evidence fcfc9fa261

The accumulation of α‐synuclein gives rise to the formation of a nucleus for the accumulation of other proteins, which ultimately leads to the formation of Lewy bodies (within the dopamine secreting cells).

Evidence 1c0e120837

PD is a proteinopathy characterized by the misfolding and aggregation of α‐synuclein synucleinopathy, which leads to the destruction of dopaminergic neurons within substantia nigra pars compacta.

Evidence d4a30f4add

By linking to the 3′‐UTR sequence of Hsp70 mRNA, miR‐16‐1 configures Hsp70. Its increase reduces the Hsp70, which in turn boosts the aggregation of α‐synuclein protein, and this increases the incidence of PD.

Evidence cefc97f098

miR‐16‐1 is a case in point that has been seen in some patients with PD.It has been shown to decrease the expression of Hsp70 by increasing the aggregation of the α‐synuclein protein

Evidence a6a000a0be

lncRNAs have been reported to cause apoptosis in the brain

Evidence 906f1c3cb4

For example, EBF3‐AS is a lncRNA that increases significantly in the hippocampus of the mice whose neurons had undergone apoptosis (Figure 1)

Evidence ecce2a195b

This protein is commonly found in the presynaptic terminus and is a factor in the transmission of synaptic dopaminergic neurons.

Evidence 366564aa74

It is interesting to note that miR‐124 has a target sequence on BACE1 mRNA, and by binding to it, it inhibits mRNA.

Evidence 698da6cc20

Moreover, inhibition of miR‐124 significantly increases the level of BACE1 in neurons. On the other hand, its overexpression significantly suppresses the expression of BACE1.

Evidence a0a80e6985

For instance, measuring lncRNA BACE1 within the cytoplasm of the patients showed that its level in patients with Alzheimer’s was significantly higher than that in the control group

Evidence 16838b47b0

BACE1‐AS can increase the expression of BACE1 mRNA by increasing its stability, which gives rise to AD

Evidence 9152008324

By attaching to the 3′‐UTR sequence, the miR‐153 reduces the expression of the APP

Evidence f56d250248

Downregulation of miR‐153 increases the expression of APP and eventually, the production of β‐ameloid is promoted, increasing the risk of AD

Evidence fcd6495e9c

Two miRNAs that play an important role in regulating α‐synuclein expression are miR‐153 and miR‐7

Evidence b61aed29e9

That is, in the event that miRNAs regulating α‐synuclein that reduce its accumulation (including miR‐153, miR‐7, miR‐132, and miR‐133‐b) are decreased, the progression of PD will be accelerated.

Evidence d299b8e3c1

These two miRNAs downregulate the α‐synuclein by binding to the 3′‐UTR portion in the mRNA transcribed from SNCA.

Evidence c6fd69d304

In an experiment conducted to investigate this, pre‐miR‐34b and premiR‐ 34c were introduced into human dopaminergic SH‐SY5S cells and it was found that the amount of α‐synuclein protein had decreased significantly.

Evidence 632f594fde

It has been shown that miR‐7 inhibition increases the expression of α‐synuclein

Evidence 29fbd79f07

The experiments conducted on SH‐SY5Y cells show that computational analyses on the miR‐15b binding site 3′‐UTR can be proven in practice, and miR‐15b expression can reduce BACE1 by binding to this sequence

Evidence 914eb7dc47

For example, miR‐339‐5p, having two binding sites on BCAE1 mRNA, can downregulate the expression of the BACE1 protein

Evidence fb9b5200c2

In addition, miR‐34‐b and miR‐34‐c have been shown to experience a significant reduction in patients with Parkinson’s compared with controls, and this reduction is accompanied by a decrease in the expression of DJ‐1 protein

Evidence 41ae58079b

It was found that miR‐384, by binding to the 3′‐UTR sequence on BACE1 mRNA, could not only reduce expression in SH‐SY5Y cells but also attach to the 3′‐UTR sequence of the mRNA APP and reduce its expression, and this highlights the importance of miR‐384 in AD

Evidence 2e11645097

On the other hand, miR‐101, by downregulating RanBP9, can indirectly reduce the production of APP

Evidence 5e031c3907

Besides, by directly affecting APP, miR‐101 can cause its downregulation, which ultimately provides the basis for AD

Evidence dfc6298b55

Given the important role of miR‐101 in preventing AD, miR‐101 reduction can play a role in AD development

Evidence cb59c33be2

As regards, the MAPKK2 pathway, miR‐9 has been shown to inhibit tangles neurofibrillary by inhibiting this pathway and to play an important role in preventing AD.

Evidence d29adc28a7

miR‐132 is another miRNA that has a regulatory effect on α‐synuclein. The downregulation of this miRNA results in the accumulation of α‐synuclein protein

Evidence da45a780a5

However, this is part of the role that miR‐132 plays in the regulation of PD.

Evidence aa132fe494

In fact, by directly affecting the expression of Nurr1, this miRNA can play a significant role in the development of PD

Evidence 37f492fadb

Let‐7 and miR‐184 have an inhibitory effect on the performance and expression of two transcription factors, namely E2F1 and DP

Evidence 428d7a31f5

A case in point is miR‐196a that affects HD

Evidence 12f6288e84

It has also been shown that miR‐205 can regulate LRRK2 and that PD is associated with a significant reduction in the level of miR‐205 in the frontal cortex and striatum

Evidence 3ea0dde8ad

Expression of miR‐205 affects the level of LRRK2 expression, and LRRK2, in turn, affects two miRNAs called let‐7 and miR‐184. This effect is associated with decreased activity and level of let‐7 and miR‐184 within the cell

Evidence 5e90a33ee5

Also, a significant relationship has been found between the number of copies of CAG and some miRNAs in the striatum and cortex of mice with Huntington. These miRNAs include miR‐206, miR‐301b, miR‐92b, miR‐378b, miR‐208b, and miR‐449a.

Evidence 7712f67b82

For example, miR‐22 with its neuroprotective function prevents the death of neurons by apoptosis.

Evidence 842aa8118d

Activation of the CAMMK2 pathway has been shown to cause tau proteins to be phosphorylated

Evidence 3f60b9940a

By activating the CAMMK2 pathway, the β‐ameloid can aid in the phosphorylation of tau proteins and eventually trigger tangles neurofibrillary.

Evidence 97f795cb3e

This disease is inherited by autosomal dominant alleles due to a mutation in the huntingtin gene (HTT).

Evidence ac5c55addb

One of the most important proteins involved in PD is the LRRK2 protein

Evidence 52dbed300a

The expression of LRRK2 mutants can cause apoptosis of neuronal and neuroblastoma cells

Evidence 6a48f9503a

One of the most important mutations in LRRK2 is the Gly2019- Ser mutant, the most common cause of familial PD.

Evidence 33a5c2ea5b

The PARK 7 gene on chromosome 1 is responsible for coding the DJ‐1 protein. This protein acts as chaperon in the neurons, thus preventing the aggregation of the α‐synuclein protein

Evidence 7ce79cd310

It also inhibits apoptosis and prevents the death of neuron

Evidence 21fc54c045

One of these factors is Ran‐binding protein 9 (RanBP9) that can increase the amount of APP in the cell by its effects

Evidence f26aca1d11

The mutation in the SNCA gene causes PD.

Evidence 0eec7b8d5e

BACE1‐AS is transcribed by opposite strand BACE1. Its upregulation in patients with Alzheimer’s can be used as a new biomarker for the diagnosis of this disease.

Evidence 7dbafa0deb

Comparing miR‐9 in patients with AD against healthy individuals shows a significant decrease of miR‐9 in patients with AD

Evidence 5d6d12c44d

Dysphagia, dysphasia, and seizures are common symptoms in HD

Evidence 98049138ac

HD is a neurodegenerative disease characterized by an insidious onset and subsequent progression of chorea and dementia, which usually presents at the ages of 30 to 50, and its symptoms increase with age.

Evidence 8c04423baa

Currently, miR‐10b‐5p, miR‐196a‐5p, miR‐196b‐ 5p, miR‐615‐3p, and miR‐1247‐5p increase in HD, and studies have shown that miR‐196a‐5p, miR‐196b‐5p, and miR‐615‐3p have been almost zero in the control group

Evidence 83641f43be

These experiments show that in apes, miR‐128a levels at birth and during the disease (either in the presymptomatic or postsymptomatic stage) show a significant reduction of this miRNA

Evidence 0d537d58c7

In 12‐month‐old HD transgenic mice, downregulation was observed in the expression of the following miRNAs: miR‐ 22, miR‐29c, miR‐128, miR‐132, miR‐138, miR‐218, miR‐ 222, miR‐344, and miR‐674

Evidence 14d4aecf53

It has been shown that DJ‐1 protein levels in patients with PD are significantly lower compared with the healthy subjects

Evidence d9ce92648a

It has also been shown that miR‐494 in patients with PD increases significantly in comparison with healthy subjects.

Evidence 79910d9740

It has been reported that downregulation of BACE1‐AS reduces the amount of β‐ameloid and plaques

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