Reversal of multidrug resistance in vincristine-resistant human gastric cancer cell line SGC7901/VCR by LY980503

AIM： To investigate the reversal effect of LY980503, a benflumetol derivative, on multidrug resistance in vincristine （VCR） -resistant human gastric carcinoma cell line SGC7901/VCR. METHODS： Cells of a human gastric cancer cell line, SGC7901, and its VCR-resistant variant, SGC7901/VCR, were cultivated with LY980503 and/or doxorubicin （DOX）. The cytotoxicity of drugs in vitro was assayed by M-IF method. Based on the flow cytometric technology, the uptake of DOX was detected in these cells by measuring DOX -associated mean fluorescence intensity （MFI）. RESULTS： SGC7901/VCR cells were 23.5 times more resistant to DOX in comparison with 5GC7901 cells. LY980503 at the concentrations of 2.0 μmol/L -10 μmol/ L had no obvious cytotoxicity to SGC7901 and SGC7901/ VCR cells. After simultaneous treatment with LY980503 at the concentrations of 2.0, 4.0 and 10 μmol/L, the ICso of DOX to SGC7901/VCR cells decreased from 1.6 ± 0.12 μmol/L to 0.55 ± 0.024, 0.25 ± 0.032 and 0.11 ± 0.015 μmol/L, respectively, thus, increasing the DOX sensitivity by 2.9-fold （P 〈 0. 05）, 6.4-fold （P 〈 0. 01） and 14.5-fold （P 〈 0. 01）, respectively. In the uptake study of DOX, simultaneous incubation of SGC7901/VCR cells with LY980503 significantly increased the DOX -associated MFI in SGC7901/VCR cells. No such results were found in parental SGC7901 cells.CONCLUSION： LY980503 at non-cytotoxic concentrations can effectively circumvent resistance of SGC7901/VCR cells to DOX by increasing intracellular DOX accumulation.

Necrotizing fasciitis of cryptoglandular infection treated with multiple incisions and thread-dragging therapy:A case report

BACKGROUND Necrotizing fasciitis is a fulminant necrotizing soft tissue disease with a high fatality rate.It always starts with impact on the deep fascia rapidly and might result in secondary necrosis of the subcutaneous tissue,fascia,and muscle.Thus,timely and multiple surgical operations are needed for the treatment.Meanwhile,the damage of skin and soft tissue caused by multiple surgical operations may require dermatoplasty and other treatments as a consequence.CASE SUMMARY Here,we report a case of 50-year-old male patient who was admitted to our hospital with symptoms of necrotizing fasciitis caused by cryptoglandular infection in the perianal and perineal region.The symptoms of necrotizing fasciitis,also known as the cardinal features,include hyperpyrexia,excruciatingly painful lesions,demonstration gas in the tissue,an obnoxious foul odor and uroschesis.The results of postoperative pathology met the diagnosis.Based on the premise of complete debridement,multiple incisions combined with thread-dragging therapy(a traditional Chinese medicine therapy)and intensive supportive therapies including comprising antibiotics,nutrition and fluids were given.The outcome of the treatment was satisfactory.The patient recovered quickly and achieved ideal anal function and morphology.CONCLUSION Timely and effective debridement and multiple incisions combined with thread-dragging therapy are an integrated treatment for necrotizing fasciitis.