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Changes in expression of serine proteases HtrA1 and HtrA2 during estrogen-induced oxidative stress and nephrocarcinogenesis in male Syrian hamster

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Zurawa-Janicka D., Kobiela J., Stefaniak T., Wozniak A., Narkiewicz J., Wozniak M., Limon J., Lipinska B.

2008

vol. 55

issue 1

9-20

Serine proteases HtrA1 and HtrA2 are involved in cellular stress response and development of several diseases, including cancer. Our aim was to examine the involvement of the HtrA proteins in acute oxidative stress response induced in hamster kidney by estrogen treatment, and in nephrocarcinogenesis caused by prolonged estrogenization of male Syrian hamster. We used semi-quantitative RT-PCR to estimate the HtrA1 and HtrA2 mRNA levels in kidney tissues, and Western blotting to monitor the amount of the HtrA proteins. Within the first five hours following estrogen administration both HtrA1 mRNA and the protein levels were increased significantly. No changes in the expression of HtrA2 were observed. This indicates that HtrA1 may be involved in the response against oxidative stress induced by estrogen treatment in hamster kidney. During prolonged estrogenization, a significant reduction of the HtrA1 mRNA and protein levels was observed after 6 months of estradiol treatment, while the expression of HtrA2 was significantly elevated starting from the third month. This suggests an involvement of the HtrA proteins in estrogen-induced nephrocarcinogenesis in hamster. Using fluorescence in situ hybridization we localized the HtrA1 gene at the qb3-4 region of Syrian hamster chromosome 2, the region known to undergo a nonrandom deletion upon prolonged estrogenization. It is possible that the reduced level of HtrA1 expression is due to this chromosomal aberration. A full-length cDNA sequence of the hamster HtrA1 gene was obtained. It codes for a 50 kDa protein which has 98 and 96% identity with mouse and human counterparts, respectively.

Immune response against HtrA proteases in children with cutaneous mastocytosis

100%

Renke J., Kędzierska-Mieszkowska S., Lange M., Nedoszytko B., Liberek A., Plata-Nazar K., Renke M., Wenta T., Żurawa-Janicka D., Skórko-Glonek J., Lipińska B.

2018

vol. 65

issue 3

471-478

Mast cells play an important role in both, the innate and adaptive immunity, however, clonal proliferation of abnormal mast cells in various organs leads to mastocytosis. A skin variant of the disease, cutaneous mastocytosis (CM) is the most frequent form of mastocytosis in children. HtrA proteases are modulators of important cellular processes, including cell signaling and apoptosis, and are related to development of several pathologies. The above and the observation that mast cells constitutively release the HtrA1 protein, prompted us to investigate a possible involvement of the HtrA proteins in pediatric CM. Levels of the serum autoantibodies (IgG) against the recombinant HtrA proteins (HtrA1-4) in children with CM (n=36) and in healthy controls (n=62) were assayed. Anti-HtrA IgGs were detected using enzyme linked immunosorbent assay (ELISA) and Western-blotting. In the CM sera, levels of the anti-HtrA1 and anti-HtrA3 autoantibodies were significantly increased when compared to the control group, while the HtrA protein levels were comparable. No significant differences in the anti-HtrA2 IgG level were found; for the anti-HtrA4 IgGs lower levels in CM group were revealed. In healthy children, the IgG levels against the HtrA1, -3 and -4 increased significantly with the age of children; no significant changes were observed for the anti-HtrA2 IgG. Our results suggest involvement of the HtrA1 and HtrA3 proteins in pediatric CM; involvement of the HtrA4 protein is possible but needs to be investigated further. In healthy children, the autoantibody levels against HtrA1, -3 and -4, but not against HtrA2, increase with age.

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2 Acta Biochimica Polonica

1 2018

1 2008

1 Kobiela J.

1 Kędzierska-Mieszkowska S.

1 Lange M.

1 Liberek A.

1 Limon J.

1 Lipinska B.

1 Lipińska B.

1 Narkiewicz J.

1 Nedoszytko B.

1 Plata-Nazar K.

1 Renke J.

1 Renke M.

1 Skórko-Glonek J.

1 Stefaniak T.

1 Wenta T.

1 Wozniak A.

1 Wozniak M.

1 Zurawa-Janicka D.

1 Żurawa-Janicka D.

Search results

Changes in expression of serine proteases HtrA1 and HtrA2 during estrogen-induced oxidative stress and nephrocarcinogenesis in male Syrian hamster

Immune response against HtrA proteases in children with cutaneous mastocytosis