rs111774530 (LINC01377/LINC01019): Liver pQTL
Key takeaways
- rs111774530 maps near LINC01377 and LINC01019, two long intergenic non-coding RNA genes linked to liver protein expression networks
- This variant is associated with a genome-wide pQTL study examining genetic regulation of protein levels in 287 human liver samples
- More than 2,000 pQTL variants were not detected in standard mRNA expression studies, suggesting a hidden layer of protein-level regulation in the liver
- Evidence is preliminary: it comes from a single study with no independent replication reported
- No lifestyle or drug response data have been linked to this variant in the available research
Key takeaways
- rs111774530 maps near LINC01377 and LINC01019, two long intergenic non-coding RNA genes linked to liver protein expression networks
- This variant is associated with a genome-wide pQTL study examining genetic regulation of protein levels in 287 human liver samples
- More than 2,000 pQTL variants were not detected in standard mRNA expression studies, suggesting a hidden layer of protein-level regulation in the liver
- Evidence is preliminary: it comes from a single study with no independent replication reported
- No lifestyle or drug response data have been linked to this variant in the available research
What the research says A genome-wide pQTL study in 287 normal human liver samples identified 900 local and 4,026 distant genetic variants associated with protein expression levels, with more than 2,000 of these not previously detected in mRNA-level expression (eQTL) studies. The study found 804 potential regulatory interactions among 595 predicted regulators (including non-coding RNAs) and 394 proteins, and this locus (LINC01377 and LINC01019) represents the class of non-coding RNA gene regions identified as candidate regulators of hepatic (liver) protein expression. Post-transcriptional regulation, meaning genetic control that occurs after mRNA is made but before the final protein is produced, was found to be a significant contributor to variation in liver protein levels.
Reported associations
- Liver protein expression (pQTL): Non-coding RNA gene loci such as this region were among the 595 predicted regulators identified in 804 regulatory interactions across 287 normal human liver samples, in a genome-wide pQTL study identifying 900 local and 4,026 distant variant associations.
- Liver disease (exploratory): The study noted that pQTL variant-disease integration analysis implied novel mechanisms connecting protein expression to liver conditions including alcohol dependence; this connection is exploratory and not specific to this locus.
Evidence quality The only available evidence comes from a single genome-wide pQTL study in 287 normal human liver samples, using a label-free absolute protein quantification method called DIA-TPA. The study text does not report a specific effect size or p-value for rs111774530 individually. No independent replication cohort is described. Connections to liver disease traits were noted as exploratory in the study. The evidence for this variant is therefore preliminary. No conflicting findings were identified in the available data, though this reflects the limited scope of available studies rather than scientific consensus.
Lifestyle considerations No lifestyle considerations on file for this variant.
Frequently asked questions
What are LINC01377 and LINC01019?
LINC01377 and LINC01019 are long intergenic non-coding RNA genes, meaning they produce RNA molecules that are not translated into proteins. Research suggests these types of non-coding RNAs may play regulatory roles in protein expression, including in the liver.
What is a pQTL and how is it different from a standard gene expression study?
A pQTL (protein quantitative trait locus) is a genetic variant that influences the amount of a specific protein produced in a tissue. Standard gene expression studies measure mRNA levels rather than proteins directly. Because mRNA and protein levels often differ substantially, pQTL studies can reveal regulatory effects that mRNA studies miss.
Is rs111774530 linked to any disease?
The available research does not directly link rs111774530 to a specific disease. The study that captured this locus noted exploratory connections between the broader set of pQTL variants and liver conditions such as alcohol dependence, but these were not validated and are not specific to this variant.
How strong is the evidence for rs111774530?
Evidence is preliminary. It comes from a single genome-wide pQTL study of 287 liver samples, and no independent replication has been reported. No specific effect size or p-value was reported for this variant individually.
Why do some genetic variants show up in protein studies but not in mRNA studies?
Many steps between mRNA production and final protein levels are regulated by additional genetic factors, a process called post-transcriptional regulation. A study in 287 human liver samples found that over 2,000 variants affect protein levels without detectably affecting mRNA, suggesting a substantial layer of regulation invisible to mRNA studies.