Human GPSM2 blocking peptide

Background and Objective: Liver cancer is a malignancy with a poor prognosis. G protein signaling modulator 2 is mainly related to cell division and cell cycle regulation. In this review, the relationship between G protein signaling modulator 2 and clinical characteristics of patients with liver cancer has been explored, especially with respect to its prognostic value. Methods: G protein signaling modulator 2 messenger RNA expression and clinicopathological characteristics of patients with liver cancer were obtained from The Cancer Genome Atlas. The expression level of G protein signaling modulator 2 RNA-Seq was validated by using Gene Expression Omnibus. Chi-square test was performed to evaluate the relationship between G protein signaling modulator 2 expression and clinical characteristics. The threshold value of G protein signaling modulator 2 in the diagnosis of liver cancer was evaluated by a receiver-operating characteristic curve. Cox regression analysis and Kaplan-Meier curves were performed to evaluate the relationship between G protein signaling modulator 2 and liver cancer prognosis, which included overall and residual-free survival, and explored the prognostic value of G protein signaling modulator 2. Liver cancer survival analyses were validated by using the data of G protein signaling modulator 2 RNA-Seq from the International Cancer Genome Consortium. Results: The expression level of G protein signaling modulator 2 messenger RNA was remarkably higher in liver cancer than that in healthy tissues (P< 2.2 x e(-16)), which was also validated by data from the GSE14520 database. In addition, high G protein signaling modulator 2 expression significantly correlated with histological grade (P= .020), vital status (P< .001), clinical (P= .001), and T stage (P= .001). The receiver-operating characteristic curves showed G protein signaling modulator 2 to be an advantageous diagnostic molecule for liver cancer (area under curve = 0.893). Furthermore, the results of Cox analysis and Kaplan-Meier curves suggested that the upregulation of G protein signaling modulator 2 expression is linked to poor prognosis and G protein signaling modulator 2 messenger RNA could be an independent predictor for liver cancer, which was validated by data from the International Cancer Genome Consortium database. Conclusions: G protein signaling modulator 2 messenger RNA was overexpressed in liver cancer, and G protein signaling modulator 2 is an independent prognostic factor. G protein signaling modulator 2 is expected to be a treatment target for cancer.

To determine whether asymmetrical cell division takes place during growth and differentiation of corneal epithelial cells, we analyzed the expression of some proteins required for the correct execution of the asymmetric division in cultured RCE1-(5T5) cells, which mimic the differentiation of corneal epithelial cells. RT-PCR and immunostaining showed that Par-3, LGN (GPSM2), NuMA, and the mammalian homolog of inscuteable (Insc) are expressed by the cultured cells. Semi-quantitative RT-PCR demonstrated that Insc mRNA levels were stable throughout the experiment. Conversely, LGN and NuMA mRNAs increased slightly and steadily in proliferative cells, reaching a peak of about 20% above basal levels when cells were confluent. At later times, LGN and NuMA mRNAs decreased to become barely detectable when cells organized into a four-layered epithelium and expressed terminal phenotype as indicated by the highest expression of LDH-H mRNA. Cultivation under low Ca2+ conditions (0.09 mM) reduced about 50% Insc mRNA expression both in proliferating and confluent cultures, but did not affect the levels of LGN and NuMA mRNAs. Hence, asymmetric cell division seems to take place with a lower frequency in cells grown with low Ca2+ concentrations, in spite of the absence of stratification. Immunostaining experiments raise the possibility of an interaction between k3/K12 keratin cytoskeleton and Par-3. The results show for the first time the coordination between the expression of corneal epithelial cell differentiation and the expression of cell polarity machinery. They also suggest that asymmetric division does not depend on stratification; instead, it seems to be part of the differentiation program. J. Cell. Physiol. 226: 700-709, 2011. (C) 2010 Wiley-Liss, Inc.