Research Article

İmatinib’e Duyarlı ve Dirençli K562 Hücrelerinde Kalneksinin Protein Ekspresyonunun Araștırılması

Volume: 71 Number: 1 October 16, 2018
Arzu Zeynep Karabay *
EN TR

İmatinib’e Duyarlı ve Dirençli K562 Hücrelerinde Kalneksinin Protein Ekspresyonunun Araștırılması

Abstract

Aim: The aim of this study is to determine the expression levels of endoplasmic reticulum (ER) chaperon protein calnexin in K562 cell line which is the cell line model of chronic myeloid leukemia characterised with the transformation of numerous blood stem cells into abnormal granulocytes. Calnexin levels in K562 cells and its resistant counterpart (K562R) to Imatinib, the first line therapy option for CML were examined. In addition, effects of first and second generation tyrosine kinase inhibitors, Imatinib and Nilotinib on calnexin levels and cell viability parameters in K562S and K562R cells were also determined. Material and Method: In this study, K562S (sensitive to Imatinib) cell line, which is the cell model of the blast phase of CML, and K562R cell lines, which are resistant to imatinib (5uM), were used. Cells were cultured in parallel. K562S cells treated with or without 0.5 uM imatinib and 0.05 uM Nilotinib and K562R cells treated with or without 20 uM Imatinib and 0.1 uM Nilotinib were collected 48 hours after treatment and cell viability, apoptosis, cell morphology and calnexin protein expression were determined with MTT assay, flow cytometry, light microscopy and western blot respectively. Results and conclusion: In this study, it was shown that the total cellular expression of calnexin, a chaperone that regulates the folding of proteins in the endoplasmic reticulum, did not show any significant difference between the K562S and K562R cells, On the other hand, since Imatinib and Nilotinib significantly decreased calnexin protein expression in K562S cells and did not show any significant effect on K562R cells, this may indicate that the ER stress pathway and possibly calnexin are involved in the action mechanisms of these drugs. Therefore, even if no significant difference in calnexin levels was found between K562R and K562S cells, there may be differences in the ER stress pathway between the sensitive and resistant cells. For further studies, it is suggested to investigate the distribution of calnexin in different intracellular compartments as well as its modulation with drugs.

Keywords

Calnexin, K562, leukemia, drug resistance

References

  1. 1) Braakman I, Hebert DN. Protein folding in the endoplasmic reticulum. Cold Spring Harb Perspect Biol. 2013; 5:a013201.
  2. 2) Schwarz DS, Blower MD. The endoplasmic reticulum: structure, function and response to cellular signaling. Cell Mol Life Sci. 2016; 73: 79-94.
  3. 3) Hamdan N, Kritsiligkou P, Grant CM. ERstress causes widespread protein aggregation and prion formation. J Cell Biol. 2017; 216: 2295-2304.
  4. 4) Alasiri G, Fan LY, Zona S, et al. ER stress and cancer: The FOXO forkhead transcription factor link. Mol Cell Endocrinol. 2018; 462(Pt B):67-81.
  5. 5) Gifford JB, Hill R. GRP78 Influences Chemoresistance and Prognosis in Cancer. Curr Drug Targets. 2017. doi: 10.2174/1389450118666170615100918.
  6. 6) Phelps EA, Cianciaruso C, Michael IP, et al. Aberrant Accumulation of the Diabetes Autoantigen GAD65 in Golgi Membranes in Conditions of ER Stress and Autoimmunity. Diabetes. 2016; 65: 2686-99.
  7. 7) Erpapazoglou Z, Mouton-Liger F, Corti O. From dysfunctional endoplasmic reticulum- mitochondria coupling to neurodegeneration. Neurochem Int. 2017; 109:171-183.
  8. 8) Garfinkel BP, Hotamisligil GS. ER Stress Promotes Inflammation through RewIREd Macrophages in Obesity. Mol Cell. 2017; 66:731-733.
  9. 9) Hebert DN, Molinari M. In and out of the ER: protein folding, quality control, degradation, and related human diseases. Physiol Rev. 2007; 87:1377-408.
  10. 10) Schrag JD, Bergeron JJ, Li Y, et al. The Structure of calnexin, an ER chaperone involved in quality control of protein folding. Mol Cell. 2001;3: 633-44.
APA
Karabay, A. Z. (2018). İmatinib’e Duyarlı ve Dirençli K562 Hücrelerinde Kalneksinin Protein Ekspresyonunun Araștırılması. Ankara Üniversitesi Tıp Fakültesi Mecmuası, 71(1), 9-15. https://izlik.org/JA35EU65NA
AMA
1.Karabay AZ. İmatinib’e Duyarlı ve Dirençli K562 Hücrelerinde Kalneksinin Protein Ekspresyonunun Araștırılması. Ankara Üniversitesi Tıp Fakültesi Mecmuası. 2018;71(1):9-15. https://izlik.org/JA35EU65NA
Chicago
Karabay, Arzu Zeynep. 2018. “İmatinib’e Duyarlı Ve Dirençli K562 Hücrelerinde Kalneksinin Protein Ekspresyonunun Araștırılması”. Ankara Üniversitesi Tıp Fakültesi Mecmuası 71 (1): 9-15. https://izlik.org/JA35EU65NA.
EndNote
Karabay AZ (October 1, 2018) İmatinib’e Duyarlı ve Dirençli K562 Hücrelerinde Kalneksinin Protein Ekspresyonunun Araștırılması. Ankara Üniversitesi Tıp Fakültesi Mecmuası 71 1 9–15.
IEEE
[1]A. Z. Karabay, “İmatinib’e Duyarlı ve Dirençli K562 Hücrelerinde Kalneksinin Protein Ekspresyonunun Araștırılması”, Ankara Üniversitesi Tıp Fakültesi Mecmuası, vol. 71, no. 1, pp. 9–15, Oct. 2018, [Online]. Available: https://izlik.org/JA35EU65NA
ISNAD
Karabay, Arzu Zeynep. “İmatinib’e Duyarlı Ve Dirençli K562 Hücrelerinde Kalneksinin Protein Ekspresyonunun Araștırılması”. Ankara Üniversitesi Tıp Fakültesi Mecmuası 71/1 (October 1, 2018): 9-15. https://izlik.org/JA35EU65NA.
JAMA
1.Karabay AZ. İmatinib’e Duyarlı ve Dirençli K562 Hücrelerinde Kalneksinin Protein Ekspresyonunun Araștırılması. Ankara Üniversitesi Tıp Fakültesi Mecmuası. 2018;71:9–15.
MLA
Karabay, Arzu Zeynep. “İmatinib’e Duyarlı Ve Dirençli K562 Hücrelerinde Kalneksinin Protein Ekspresyonunun Araștırılması”. Ankara Üniversitesi Tıp Fakültesi Mecmuası, vol. 71, no. 1, Oct. 2018, pp. 9-15, https://izlik.org/JA35EU65NA.
Vancouver
1.Arzu Zeynep Karabay. İmatinib’e Duyarlı ve Dirençli K562 Hücrelerinde Kalneksinin Protein Ekspresyonunun Araștırılması. Ankara Üniversitesi Tıp Fakültesi Mecmuası [Internet]. 2018 Oct. 1;71(1):9-15. Available from: https://izlik.org/JA35EU65NA