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Interleukin-8 does not influence proliferation of the SGC7901 gastric cancer cell line.

Shi J, Wei PK - Oncol Lett (2014)

Bottom Line: However, IL-8 was shown to regulate PCNA protein and mRNA expression levels; at a concentration of 0.8 ng/ml, IL-8 significantly elevated the PCNA protein and mRNA expression levels, whereas IL-8 significantly inhibited these levels at other concentrations, compared with no treatment.In conclusion, IL-8 does not affect the proliferation of SGC7901 cells.However, IL-8 dosage was associated with PCNA protein and mRNA expression levels.

View Article: PubMed Central - PubMed

Affiliation: Department of Traditional Chinese Medicine, Shanghai Changzheng Hospital, The Second Military Medical University, Shanghai 200003, P.R. China.

ABSTRACT
Interleukin-8 (IL-8), an important inflammatory factor, is induced by Helicobacter pylori infection and is clearly associated with gastric cancer. IL-8 levels have been revealed to correlate significantly with the adhesion, migration and invasion of gastric cancer cells. However, whether IL-8 influences cell proliferation in gastric cancer remains unclear. In the present study, the effect of IL-8 on the proliferation of the SGC7901 human gastric cancer cell line was investigated. SGC7901 cells were exposed to various concentrations of IL-8 (0, 0.2, 0.5, 0.8 and 1 ng/ml) for one to seven days. Cell proliferation was detected by Cell Counting Kit-8 assay. In addition, proliferating cell nuclear antigen (PCNA) protein and mRNA levels were measured by immunofluorescence, western blotting and quantitative polymerase chain reaction. Following exposure of SGC7901 cells to the various concentrations of IL-8, no significant changes in terms of cell proliferation were identified. However, IL-8 was shown to regulate PCNA protein and mRNA expression levels; at a concentration of 0.8 ng/ml, IL-8 significantly elevated the PCNA protein and mRNA expression levels, whereas IL-8 significantly inhibited these levels at other concentrations, compared with no treatment. In conclusion, IL-8 does not affect the proliferation of SGC7901 cells. However, IL-8 dosage was associated with PCNA protein and mRNA expression levels.

No MeSH data available.


Related in: MedlinePlus

Effect of interleukin-8 on PCNA mRNA expression levels in SGC7901 gastric cancer cells (reverse transcription quantitative polymerase chain reaction). A, marker DL2000 (from top to bottom: 750, 500, 250 and 100 bp; B–F, hGAPDH (0–1 ng/ml, 145 bp); G–K, PCNA (0–1 ng/ml, 229 bp). PCNA, proliferating cell nuclear antigen.
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f6-ol-08-06-2475: Effect of interleukin-8 on PCNA mRNA expression levels in SGC7901 gastric cancer cells (reverse transcription quantitative polymerase chain reaction). A, marker DL2000 (from top to bottom: 750, 500, 250 and 100 bp; B–F, hGAPDH (0–1 ng/ml, 145 bp); G–K, PCNA (0–1 ng/ml, 229 bp). PCNA, proliferating cell nuclear antigen.

Mentions: A statistically significant difference between mRNA expression levels in all groups was observed when compared with that of the control group (P<0.001), with PCNA mRNA expression levels exhibiting a similar pattern to the PCNA protein expression levels. IL-8 at concentrations of 0.2 and 0.5 ng/ml significantly downregulated the expression of PCNA mRNA, compared with no treatment (P<0.01). By contrast, treatment with 0.8 ng/ml IL-8 significantly upregulated the expression of PCNA mRNA, compared with no treatment (P<0.05; Table III, Figs. 5 and 6).


Interleukin-8 does not influence proliferation of the SGC7901 gastric cancer cell line.

Shi J, Wei PK - Oncol Lett (2014)

Effect of interleukin-8 on PCNA mRNA expression levels in SGC7901 gastric cancer cells (reverse transcription quantitative polymerase chain reaction). A, marker DL2000 (from top to bottom: 750, 500, 250 and 100 bp; B–F, hGAPDH (0–1 ng/ml, 145 bp); G–K, PCNA (0–1 ng/ml, 229 bp). PCNA, proliferating cell nuclear antigen.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4214491&req=5

f6-ol-08-06-2475: Effect of interleukin-8 on PCNA mRNA expression levels in SGC7901 gastric cancer cells (reverse transcription quantitative polymerase chain reaction). A, marker DL2000 (from top to bottom: 750, 500, 250 and 100 bp; B–F, hGAPDH (0–1 ng/ml, 145 bp); G–K, PCNA (0–1 ng/ml, 229 bp). PCNA, proliferating cell nuclear antigen.
Mentions: A statistically significant difference between mRNA expression levels in all groups was observed when compared with that of the control group (P<0.001), with PCNA mRNA expression levels exhibiting a similar pattern to the PCNA protein expression levels. IL-8 at concentrations of 0.2 and 0.5 ng/ml significantly downregulated the expression of PCNA mRNA, compared with no treatment (P<0.01). By contrast, treatment with 0.8 ng/ml IL-8 significantly upregulated the expression of PCNA mRNA, compared with no treatment (P<0.05; Table III, Figs. 5 and 6).

Bottom Line: However, IL-8 was shown to regulate PCNA protein and mRNA expression levels; at a concentration of 0.8 ng/ml, IL-8 significantly elevated the PCNA protein and mRNA expression levels, whereas IL-8 significantly inhibited these levels at other concentrations, compared with no treatment.In conclusion, IL-8 does not affect the proliferation of SGC7901 cells.However, IL-8 dosage was associated with PCNA protein and mRNA expression levels.

View Article: PubMed Central - PubMed

Affiliation: Department of Traditional Chinese Medicine, Shanghai Changzheng Hospital, The Second Military Medical University, Shanghai 200003, P.R. China.

ABSTRACT
Interleukin-8 (IL-8), an important inflammatory factor, is induced by Helicobacter pylori infection and is clearly associated with gastric cancer. IL-8 levels have been revealed to correlate significantly with the adhesion, migration and invasion of gastric cancer cells. However, whether IL-8 influences cell proliferation in gastric cancer remains unclear. In the present study, the effect of IL-8 on the proliferation of the SGC7901 human gastric cancer cell line was investigated. SGC7901 cells were exposed to various concentrations of IL-8 (0, 0.2, 0.5, 0.8 and 1 ng/ml) for one to seven days. Cell proliferation was detected by Cell Counting Kit-8 assay. In addition, proliferating cell nuclear antigen (PCNA) protein and mRNA levels were measured by immunofluorescence, western blotting and quantitative polymerase chain reaction. Following exposure of SGC7901 cells to the various concentrations of IL-8, no significant changes in terms of cell proliferation were identified. However, IL-8 was shown to regulate PCNA protein and mRNA expression levels; at a concentration of 0.8 ng/ml, IL-8 significantly elevated the PCNA protein and mRNA expression levels, whereas IL-8 significantly inhibited these levels at other concentrations, compared with no treatment. In conclusion, IL-8 does not affect the proliferation of SGC7901 cells. However, IL-8 dosage was associated with PCNA protein and mRNA expression levels.

No MeSH data available.


Related in: MedlinePlus