Galectin-8 is a protein of the galectin family that in humans is encoded by the LGALS8 gene. This gene encodes a member of the galectin family. Galectins are beta-galactoside-binding animal lectins with conserved carbohydrate recognition domains. The galectins have been implicated in many essential functions including development, differentiation, cell-cell adhesion, cell-matrix interaction, growth regulation, apoptosis, and RNA splicing. This gene is widely expressed in tumoral tissues and seems to be involved in integrin-like cell interactions. Alternatively spliced transcript variants encoding different isoforms have been identified. Galectin-8, interacts with the mTOR regulatory system composed of SLC38A9, Ragulator, RagAB, RagCD. Galectin-8 controls mTOR causing its inactivation and dissociation from damaged lysosomes, hence transducing the breach of the lysosomal membrane to mTOR. The physiological consequences of mTOR inhibition following lysosomal membrane damage[8] encompass autophagy and metabolic switching.
Background References
1. Thurston T L et al. Galectin 8 targets damaged vesicles for autophagy to defend cells against bacterial invasion. Nature 482:414-418 (2012).
2. Staring J et al. PLA2G16 represents a switch between entry and clearance of Picornaviridae. Nature 541:412-416 (2017).
Tissue Specificity
Ubiquitous. Selective expression by prostate carcinomas versus normal prostate and benign prostatic hypertrophy.
Western blot analysis of Galectin 8 on different lysates with Rabbit anti-Galectin 8 antibody (ET7107-56) at 1/5,000 dilution.
Lane 1: PANC-1 (Human epidermoid carcinoma pancreatic ductal cell) cell lysate Lane 2: Mouse testis tissue lysate Lane 3: Rat testis tissue lysate
Cell lysates at 10 µg/Lane,tissue lysates at 10 µg/Lane Exposure time: 62 seconds; ECL: K1801
Blocking: 5% NFDM/TBST, 1 hour at room temperature Primary antibody: ET7107-56, 1/5,000 in primary antibody dilution buffer (K1803), overnight at 4 ℃ Secondary antibody: Goat anti-Rabbit IgG-HRP (HA1001), 1/50,000 in 5% NFDM/TBST, 1 hour at room temperature
Predicted band size: 36 kDa Observed band size: 42 kDa
Immunohistochemical analysis of paraffin-embedded human kidney tissue using anti-Galectin 8 antibody. The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 8.0-8.4) for 20 minutes.The tissues were blocked in 5% BSA for 30 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET7107-56, 1/50) for 30 minutes at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
Immunohistochemical analysis of paraffin-embedded human liver tissue using anti-Galectin 8 antibody. The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 8.0-8.4) for 20 minutes.The tissues were blocked in 5% BSA for 30 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET7107-56, 1/50) for 30 minutes at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
Immunohistochemical analysis of paraffin-embedded human colon carcinoma tissue using anti-Galectin 8 antibody. The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 8.0-8.4) for 20 minutes.The tissues were blocked in 5% BSA for 30 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET7107-56, 1/50) for 30 minutes at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
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