Metastasis-associated lung adenocarcinoma transcript 1 molecular mechanisms in gastric cancer progression

Figure 1 Metastasis-associated lung adenocarcinoma transcript 1 subcellular location. A: Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is the red strand around the nuclear spots (white spheres), MALAT1 can interact with proteins present in nuclear speckles; B: MALAT1 can interact with serine/arginine proteins to modulate alternative splicing of pre-mRNAs; C: MALAT1 binds with transcriptional enhancer factor transcriptional enhanced factors with TEA/ATTS domain, blocking Yes-associated protein, inhibiting gene transcription. MALAT1: Metastasis-associated lung adenocarcinoma transcript 1; SR: Serine/arginine-rich; TEAD: Transcriptional enhanced factors with TEA/ATTS domain; YAP: Yes-associated protein.

Figure 2 Metastasis-associated lung adenocarcinoma transcript 1 expression is influenced by protein CCL21. Metastasis-associated lung adenocarcinoma transcript 1 sponges miR-202-3p, then SRSF1 mRNA (serine and arginine-rich splicing factor 1) is translated in protein and activates mammalian target of rapamycin pathway improving epithelial-mesenchymal transition (EMT) factors and decreasing E-cadherin expression. EMT: epithelial-mesenchymal transition; MALAT1: Metastasis-associated lung adenocarcinoma transcript 1; SRSF1: serine and arginine-rich splicing factor 1; mTOR: Mammalian target of rapamycin.

Figure 3 MALAT1 modulates acetylation in promoter region epidermal growth factor-like domain-containing protein 7 located in histone H3. A: Transfection of small interfering MALAT1 reduces acetylation on promoter region of EGFL7 gene (Epidermal growth factor-like domain-containing protein 7), decreasing metastasis, cell invasion and migration; B: Plasmid cloning DNA-MALAT1 transfection increases EGFL7 acetylation and protein expression, promoting migration, invasion, and metastasis of GC cells. EGFL7: Epidermal growth factor-like domain-containing protein 7; MALAT1: Metastasis-associated lung adenocarcinoma transcript 1; siMALAT1: Small interfering RNA MALAT1; pcDNA-MALAT1: Plasmid cloning DNA-MALAT1; siEGFL7: Small interfering RNA EGFL7.