The present experiments, however, show that if human peripheral blood lymphocytes are irradiated with low doses of X-rays (2 cGy) at 48 hr of culture, before being exposed to radon at 72 hr of culture, the yield of chromatid deletions induced by radon is decreased by a factor of two.
Therefore, HCT-116 cells were pretreated with pharmacological inhibitors of PI3K (LY294002), MEK1 (PD098059), or p38 (SB202190) for 30 min before being exposed to 6S at 20 μM.
Phototoxic damage to 661W cell cultures was induced by treatment with glucose and 9-cis retinal immediately before being exposed to white light at 20,000 lux from below provided by a NorthStar 10,000 broad spectrum light box (Alaskan Northern Lights, Reno, NV).
In this test, mice are habituated in a chamber for 3 5 minutes before being exposed to a tone, at the end of which they receive a mild foot shock (the US).
Membranes were washed twice at 42°C using with 2 × SSC, 0.1% SDS for 10 min. before being exposed to autoradiographic film (Denville Scientific) at - 80°C.
They were then exposed to white light (90 μmol m-2 s-1) at 20°C for 60 min and returned to darkness for 23 hr before being exposed to varying fluence rates at 20°C for 7 days.
To block the JNK1 kinase activation, cells were treated with 1 µM cell-permeable JNK inhibitor 1, (EMD Chemicals, Inc., Gibbstown, NJ, USA) overnight at 37°C before being exposed to anisomycin for 30 min. Cells were treated with 10 mM nicotinamide (1 M stock solution in distilled water) or 50 µM Sirtinol (50 mM stock in DMSO) overnight before treatment with H2O2 or anisomycin.
In a new Falcon tube 30 million washed spermatozoa were added to 12 ml of capacitation media containing TL-Hepes, 11 mM glucose, 5 mM pyruvic acid, and 20 mg/ml BSA and capacitated for 6 hrs at 38.5°C before being exposed to solubilized ZP.
Following hybridization, the membranes were washed three times (30 min each) in 2 × SSC containing 0.1% SDS at 42°C, 1 × SSC containing 0.1% SDS and 0.1 × SSC containing 0.1% SDS at 56°C before being exposed to X-ray film.
Following hybridization, the membranes were washed 3 times (30 min each) in 2 × SSC containing 0.1% SDS at 42°C, 1 × SSC containing 0.1% SDS and 0.1 × SSC containing 0.1% SDS at 56°C, before being exposed to X-ray film.
