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MicroRNA-27a decreases the level and efficiency of the LDL receptor and contributes to the dysregulation of cholesterol homeostasis
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Numerous miRNAs directly bind LDLR mRNA 3′UTR and decrease its expression, including miR-27a, miR-27b, miR-128-1, miR-128-3p, miR-130b, miR-148a, miR-184a, miR-185, and miR-301b.
“Numerous miRNAs have been shown to directly bind LDLR mRNA 3' UTR and decrease its expression (Fig. 2), including miR-27a, miR-27b, miR-128-1, miR-128-3p, miR-130b, miR-148a, miR-184a, miR-185, and miR-301b [43][44][45][46][47][48].”
From The low-density lipoprotein receptor: Emerging post-transcriptional regulatory mechanisms (2025) · cites this paper as [43]
The Results section ('miR-27a directly downregulates LDLR by binding to its 3′UTR region') confirms direct binding and reduced LDLR expression for miR-27a. This paper does not establish that the other listed miRNAs directly bind the LDLR 3′UTR and decrease its expression; the Discussion instead notes evidence suggesting miR-27b does not modulate LDLR in differentiated hepatocyte-like cells. (LLM, conf=0.88)
Experimental — accuracy not yet measuredmiR-27a, miR-27b, miR-128-1, miR-128-3p, miR-130b, miR-148a, miR-184a, miR-185, and miR-301b inhibit expression of the LDLR, decreasing LDLR.
“miR-27a, miR-27b, miR-128-1, miR-128-3p, miR-130b, miR-148a, miR-184a, miR-185, miR-301b Inhibit expression of the LDLR ↓ [43-48]”
From The low-density lipoprotein receptor: Emerging post-transcriptional regulatory mechanisms (2025) · cites this paper as [43]
The Results section shows that miR-27a decreases LDLR mRNA and protein in HepG2 cells. The cited paper does not establish the same LDLR effect for the other listed miRNAs; its Discussion says prior findings suggest miR-27a, but not miR-27b, modulates LDLR in differentiated hepatocyte-like cells. The citation therefore supports the miR-27a part of the grouped claim, not the full list. (LLM, conf=0.88)
Experimental — accuracy not yet measuredOverexpression of miR-27a decreased LDLR expression by 50% in HepG2 cells.
“Conversely, overexpression of miR-27a decreased LDLR expression by 50% in HepG2 cells55.”
From Pathways and Molecular Mechanisms Governing LDL Receptor Regulation (2025) · cites this paper as [55]
The Abstract (Methods and Results; page not provided) reports that miR-27a decreased LDLR levels by 40% in HepG2 cells. The Results section reports an approximately 50% decrease in LDLR activity, not expression, after miR-27a mimic transfection. The claim conflates those two measurements. (LLM, conf=0.90)
Experimental — accuracy not yet measuredLDLR mRNA contains one well conserved miR-27a binding site.
“LDLR mRNA contains one well conserved miR-27a binding site55.”
From Pathways and Molecular Mechanisms Governing LDL Receptor Regulation (2025) · cites this paper as [55]
miR-27a and miR-27b are two highly similar miRNAs originating from the same seed sequence with a difference of a single nucleotide.
“The miR-27 family (miR-27a and miR-27b) are two highly similar miRNAs originating from the same seed sequence with a difference of a single nucleotide55.”
From Pathways and Molecular Mechanisms Governing LDL Receptor Regulation (2025) · cites this paper as [55]
miR-27a promotes expression of PCSK9, decreasing LDLR.
“miR-27a Promotes expression of PCSK9 ↓ [43,45,49]”
From The low-density lipoprotein receptor: Emerging post-transcriptional regulatory mechanisms (2025) · cites this paper as [43]
miR-27a and miR-27b have been shown to decrease LDLR mRNA expression.
“miR-27a and miR-27b have been shown to decrease LDLR mRNA expression55–57.”
From Pathways and Molecular Mechanisms Governing LDL Receptor Regulation (2025) · cites this paper as [55]
Alvarez et al. demonstrated that miR-27a interacts directly with the predicted LDLR binding site, and mutations in this site prevented interaction and regulation by miR-27a in HepG2 cells.
“Alvarez et. al, demonstrated that miR-27a interacts directly with the predicted LDLR binding site, and that mutations in this site prevented interaction and regulation by the miR-27a in HepG2 cells55.”
From Pathways and Molecular Mechanisms Governing LDL Receptor Regulation (2025) · cites this paper as [55]
miR-27a directly suppresses LDLR and significantly increases PCSK9 expression, which synergistically leads to reduced LDLR.
“Notably, miR-27a not only directly suppresses LDLR but also significantly increases PCSK9 expression, which synergistically leads to reduced LDLR [43].”
From The low-density lipoprotein receptor: Emerging post-transcriptional regulatory mechanisms (2025) · cites this paper as [43]
Inhibition of miR-27a results in a ~1.5-fold increase in LDLR mRNA and protein levels and a ~50% decrease in PCSK9 in HepG2 cells.
“Accordingly, inhibition of miR-27a results in a ~1.5-fold increase in LDLR mRNA and protein levels and a ~50 % decrease in PCSK9 in HepG2 cells.”
From The low-density lipoprotein receptor: Emerging post-transcriptional regulatory mechanisms (2025) · cites this paper as [43]
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Citations
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Metadata
- Authors
- Alvarez, M. L., Khosroheidari, M., Eddy, E., & Done, S. C.
- Venue
- Atherosclerosis
- Publisher
- Elsevier BV
- Published
- 2015-10
- Volume
- 242
- Issue
- 2
- Pages
- 595-604
- ISSN
- 0021-9150
- PMC
- PMC4575910
- Cited by
- 88
- References
- 6
- Language
- en
- Funders
- National Heart, Lung and Blood Institute (R01 HL093042)
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