Question: Does HuR protein regulate the splicing process?

Context:
HuR and TIA1/TIAL1 are involved in regulation of alternative splicing of SIRT1 pre-mRNA
Here we describe experiments showing that HuR and TIA1/TIAL1, two kinds of RNA-binding proteins, were involved in the regulation of alternative splicing of SIRT1 pre-mRNA under normal and stress circumstances
HuR increased SIRT1-∆Exon8 by promoting SIRT1 exon 8 exclusion, whereas TIA1/TIAL1 inhibition of the exon 8 exclusion led to a decrease in SIRT1-∆Exon8 mRNA levels. 
HuR regulates alternative splicing of the TRA2β gene in human colon cancer cells under oxidative stress
Hu antigen R (HuR) regulates stress responses through stabilizing and/or facilitating the translation of target mRNAs
We show here that the RBP embryonic lethal abnormal vision like 1 (ELAVL1, also know as HuR) regulates the alternative splicing of eukaryotic translation initiation factor 4E nuclear import factor 1 (Eif4enif1), which encodes an eukaryotic translation initiation factor 4E transporter (4E-T) protein and suppresses the expression of capped mRNAs
Further, endothelial-specific Elavl1 knockout mice exhibited reduced revascularization after hind limb ischemia and tumor angiogenesis in oncogene-induced mammary cancer, resulting in attenuated blood flow and tumor growth, respectively. 
Changes in cellular mRNA stability, splicing, and polyadenylation through HuR protein sequestration by a cytoplasmic RNA virus
Furthermore, significant changes can be observed in nuclear alternative polyadenylation and splicing events on cellular pre-mRNAs as a result of sequestration of HuR protein by the 3' UTR of transcripts of this cytoplasmic RNA virus.
Here we demonstrate that expression of 2A(pro) induces a selective nucleo-cytoplasm translocation of several important RNA binding proteins and splicing factors. Subcellular fractionation studies, together with immunofluorescence microscopy revealed an asymmetric distribution of HuR and TIA1/TIAR in 2A(pro) expressing cells, which modulates splicing of the human Fas exon 6
knockdown of HuR or overexpression of TIA1/TIAR, leads to Fas exon 6 inclusion in 2A(pro)-expressing cells
The differential expression levels of T-cell intracellular antigens (TIA) and Hu antigen R (HuR) are concomitant with a splicing switch in apoptosis receptor Fas in HCT-116 cells
overexpression and knockdown of HuR led to Fas exon 6 skipping and inclusion, respectively. These results suggest that the TIA and HuR cellular ratio influences cell-type specific Fas exon 6 splicing pattern.
Hu antigen R (HuR) functions as an alternative pre-mRNA splicing regulator of Fas apoptosis-promoting receptor on exon definition
antiapoptotic regulator Hu antigen R (HuR, ELAVL1), a member of the embryonic lethal, abnormal vision, Drosophila-like (ELAVL) family, promotes Fas exon 6 skipping by binding to an exonic splicing silencer
ELAV/Hu proteins bind to AU-rich elements (ARE) in mRNAs and regulate their stability from splicing to translation, and the ubiquitous HuR protein has been implicated in cancerous cell growth.
The HuR protein regulates the expression of thousands of cellular transcripts by modulating mRNA splicing, trafficking, translation, and stability.
Hu antigen R (HuR) functions as an alternative pre-mRNA splicing regulator of Fas apoptosis-promoting receptor on exon definition.
I report that antiapoptotic regulator Hu antigen R (HuR, ELAVL1), a member of the embryonic lethal, abnormal vision, Drosophila-like (ELAVL) family, promotes Fas exon 6 skipping by binding to an exonic splicing silencer. 
Changes in cellular mRNA stability, splicing, and polyadenylation through HuR protein sequestration by a cytoplasmic RNA virus.
Further, the silencing capacity of HuR as splicing regulator resides in the RRM1 and hinge-RRM3 domains. 
HuR and TIA1/TIAL1 are involved in regulation of alternative splicing of SIRT1 pre-mRNA.
HuR regulates alternative splicing of the TRA2β gene in human colon cancer cells under oxidative stress.
The HuR protein regulates the expression of thousands of cellular transcripts by modulating mRNA splicing, trafficking, translation, and stability. 
Further, the silencing capacity of HuR as splicing regulator resides in the RRM1 and hinge-RRM3 domains. Taken together, these results support a functional link between HuR as repressor of alternative Fas splicing and the molecular mechanisms modulating programmed cell death.
We are interested in interactions involving hnRNP proteins participating in several steps of mRNA processing (mainly pre-mRNA splicing) and HuR with an established role in stability/translation of associated mRNAs. hnRNP and HuR proteins have a major nucleoplasmic localization and ability to shuttle between nucleus and cytoplasm. We report here on interactions between hnRNP and HuR proteins that were identified in the context of isolated hnRNP and mRNP complexes. 
Despite the fact that HuR sites are observed in intronic regions, our data do not support a role for HuR in regulating splicing.

Answer: Recent research demonstrated that SIRT1 pre-mRNA undergoes alternative splicing to produce different isoforms, such as SIRT1 full-length and SIRT1-∆Exon8 variants. Here we describe experiments showing that HuR and TIA1/TIAL1, two kinds of RNA-binding proteins, were involved in the regulation of alternative splicing of SIRT1 pre-mRNA under normal and stress circumstances: HuR increased SIRT1-∆Exon8 by promoting SIRT1 exon 8 exclusion, whereas TIA1/TIAL1 inhibition of the exon 8 exclusion led to a decrease in SIRT1-∆Exon8 mRNA levels. This study provides novel insight into how the alternative splicing of SIRT1 pre-mRNA is regulated, which has fundamental implications for understanding the critical and multifunctional roles of SIRT1. Further, endothelial-specific Elavl1 knockout mice exhibited reduced revascularization after hind limb ischemia and tumor angiogenesis in oncogene-induced mammary cancer, resulting in attenuated blood flow and tumor growth, respectively.
HuR and TIA1/TIAL1 are involved in regulation of alternative splicing of SIRT1 pre-mRNA
Hu antigen R (HuR) functions as an alternative pre-mRNA splicing regulator of Fas apoptosis-promoting receptor on exon definition. HuR and TIA1/TIAL1, two kinds of RNA-binding proteins, were involved in the regulation of alternative splicing of SIRT1 pre-mRNA under normal and stress circumstances. Overexpression and knockdown of HuR led to Fas exon 6 skipping and inclusion, respectively. These results suggest that the TIA and HuR cellular ratio influences cell-type specific Fas exon 6 splicing pattern.
Exact answer: yes