Background
Methods
Preparation of rat primary cultured astrocytes
Treatment with ETs and the other drugs
Measurement of chemokine mRNA levels by quantitative RT-PCR
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CCL2,
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5′-TTCACTGGCAAGATGATCCC-3′ and 5′-TGCTTGAGGTGGTTGTGGAA-3′;
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CXCL1,
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5′- GAAGATAGATTGCACCGATG -3′ and 5′- CATAGCCTCTCACACATTTC-3′;
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CCL5/RANTES,
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5′-CACCGTCATCCTCGTTGC-3′ and 5′-CACTTGGCGGTTCCTTCG-3′;
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CX3CL1/fractalkine,
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5′- GAATTCCTGGCGGGTCAGCACCTCGGCATA-3′ and 5′-AAGCTTTTACAGGGCAGCCGTCTGGTGGT-3′
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CXCL12/ stromal cell-derived factor-1 (SDF-1),
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5′-TTGCCAGCACAAAGACACTCC-3′ and 5′-CTCCAAAGCAAACCGAATACAG-3′;
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glyceraldehydes-3-phosphate dehydrogenase (G3PDH),
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5′-CTCATGACCACAGTCCATGC-3′ and 5′-TACATTGGGGGTAGGAACAC-3′.
Determination of chemokine proteins
Results
Effect of ETs on chemokine production in cultured astrocytes
mRNA copy number | |||
---|---|---|---|
(× 10
3
/μg total RNA)
| |||
Neuron
|
Astrocyte
|
Microglia
| |
CCL2/MCP-1 | 189.9 ± 9.8 | 3050.8 ± 521.5 | 148.9 ± 31.6 |
CCL5/RANTES | 10.3 ± 0.7 | 52.5 ± 18.7 | 4.3 ± 2.2 |
CXCL1/CINC-1 | 22.0 ± 2.2 | 1410.0 ± 266.9 | 34.4 ± 18.1 |
CXCL12/SDF-1α | 92.1 ± 4.0 | 255.4 ± 45.7 | 29.1 ± 13.6 |
CX3CL1/fractalkine | 1,118.1 ± 108.4 | 1,721.0 ± 303.5 | 23.4 ± 6.6 |
G3PDH | 40,081.9 ± 7,335.2 | 46,575.5 ± 6,274.4 | 48,586.5 ± 5,733.6 |
Effects of signal transduction inhibitors on the ET-induced alterations of chemokine production
Ratio of chemokine to G3PDH mRNA copy number | |||
---|---|---|---|
(% of no treatment) | |||
CCL2/MCP-1 | CXCL1/CINC-1 | CX3CL1/fractalkine | |
no treatment | 100.0 ± 31.4 (20) | 100.0 ± 22.0 (20) | 100.0 ± 17.5 (24) |
100 nM ET-1 | 313.8 ± 65.1 (20)a
| 404.7 ± 63.9 (20)a
| 37.5 ± 8.5 (23)a
|
+ 30 μM BAPTA/0.5 mM EGTA | 307.4 ± 89.0 (7) | 342.7 ± 65.0 (7) | 122.8 ± 25.2 (9)b
|
+ 10 nM staurosporine | 444.8 ± 122.3 (6) | 385.4 ± 79.0 (6) | 108.6 ± 25.6 (4)b
|
+ 100 μM PDTC | 129.2 ± 16.5 (12)b
| 140.2 ± 20.7 (12)b
| 42.5 ± 8.8 (18) |
+ 10 μM SN50 | 188.7 ± 64.3(8)b
| 136.1 ± 22.6 (8)b
| 54.6 ± 23.9 (11) |
+ 500 nM mithramycin | 37.8 ± 9.2 (8)c
| 49.8 ± 24.1 (8)c
| 36.3 ± 11.7 (10) |
+ 50 μM PD98059 | 277.4 ± 90.7 (12) | 360.2 ± 103.2 (12) | 49.6 ± 7.2 (10) |
+ 20 μM SB203580 | 118.3 ± 36.9 (13)c
| 229.1 ± 73.6 (13)b
| 37.1 ± 6.3 (20) |
+ 1 μM SP600125 | 110.2 ± 23.6 (8)b
| 188.5 ± 22.5 (8)b
| 47.1 ± 22.0 (10) |