Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:2.7.7.48 (transcriptase)
 9,479 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Mouse spermatogenic cells are known to express HSP70-2, a member of the HSP70 family of heat-shock proteins. The purpose of the present study was to characterize further the expression and localization of HSP70-2 in meiotic cells of mice and hamsters. After separating mouse spermatogenic cells into cytoplasmic and nuclear fractions, proteins were separated by two-dimensional gel electrophoresis and detected with HSP-specific antibodies. Of several HSP70 proteins identified in the cytoplasm, only HSC70 and HSP70-2 were also detected in the nucleus. Immunocytological analyses of spermatocyte prophase cells revealed that HSP70-2 was associated with the synaptonemal complex. Surface-spread synaptonemal complexes at pachytene and diplotene stages labeled distinctly with the antiserum to HSP70-2. Synaptonemal complexes from fetal mouse oocytes failed to show any evidence of HSP70-2. Reverse-transcriptase-polymerase chain reaction (RT-PCR) analyses of gene expression confirmed this sex specificity; Hsp70-2 mRNA was detected in mouse testes, but not ovaries. These findings are suggestive of a previously unsuspected sexual dimorphism in structure and/or function of the synaptonemal complex.
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PMID:HSP70-2 is part of the synaptonemal complex in mouse and hamster spermatocytes. 860 36

Hepatocellular carcinoma (HCC) remains one of the most common cancers worldwide. HSPA2 has been highlighted as an important marker in many types of cancers. However, little is known about the role of HSPA2 in HCC. The objective of the current study was to investigate the expression pattern and clinicopathological significance of HSPA2 in patients with HCC. Quantitative reverse-transcriptase ploymerase chain reaction (qRT-PCR) was applied to examine HSPA2 messenger RNA (mRNA) expression in 52 pairs of HCC tissues and adjacent noncancerous tissues. Immunohistochemistry (IHC) was performed to examine HSPA2 protein expression in paraffin-embedded tissues from 119 HCC patients. Statistical analyses were applied to evaluate the diagnostic value and associations of HSPA2 expression with clinicopathological characteristics. We identified abnormally elevated mRNA expression of HSPA2 in HCC tissues compared to paired adjacent noncancerous tissues (P < 0.001). Clinicopathological analysis showed that HSPA2 expression was significantly correlated with tumor size (P = 0.013), histological differentiation (P = 0.04), and tumor stage (P = 0.001). Patients with higher HSPA2 expression had shorter overall survival time, whereas those with lower HSPA2 expression had longer survival time. Furthermore, Cox regression analyses showed that HSPA2 expression was an independent predictor of overall survival. In conclusion, our findings provide evidences that positive expression of HSPA2 in HCC may be important in the acquisition of an aggressive phenotype and it is an independent biomarker for poor prognosis of patients with HCC.
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PMID:Expression of HSPA2 in human hepatocellular carcinoma and its clinical significance. 2511 73