Nano-titanium dioxide modulates the dermal sensitization potency of DNCB.
Nano-titanium dioxide modulates the dermal sensitization potency of DNCB.
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DOI:
10.1186/1743-8977-9-15
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发表时间:
2012-05-23
影响因子:
10
通讯作者:
Vanoirbeek JA
中科院分区:
文献类型:
--
作者:
Hussain S;Smulders S;De Vooght V;Ectors B;Boland S;Marano F;Van Landuyt KL;Nemery B;Hoet PH;Vanoirbeek JA
We determined the ability of a model nanoparticle (NP) (titanium dioxide, TiO2) to modulate sensitization induced by a known potent dermal sensitizer (dinitrochlorobenzene) using a variant of the local lymph node assay called lymph node proliferation assay. BALB/c mice received sub-cutaneous injections of vehicle (2.5 mM sodium citrate), TiO2 NPs (0.004, 0.04 or 0.4 mg/ml) or pigment particles (0.04 mg/ml) both stabilized in sodium citrate buffer at the base of each ear (2x50μl), before receiving dermal applications (on both ears) of 2,4-Dinitrochlorobenzene (DNCB) (2x25μl of 0.1%) or its vehicle (acetone olive oil – AOO (4:1)) on days 0, 1 and 2. On day 5, the stimulation index (SI) was calculated as a ratio of 3HTdR incorporation in lymphocytes from DNBC-treated mice and AOO-treated controls. In a second experiment the EC3-value for DNCB (0 to 0.1%) was assessed in the absence or presence of 0.04 mg/ml TiO2. In a third experiment, the lymphocyte subpopulations and the cytokine secretion profile were analyzed after TiO2 (0.04 mg/ml) and DNCB (0.1%) treatment. Injection of NPs in AOO-treated control mice did not have any effect on lymph node (LN) proliferation. DNCB sensitization resulted in LN proliferation, which was further increased by injection of TiO2 NPs before DNCB sensitization. The EC3 of DNCB, with prior injection of vehicle control was 0.041%, while injection with TiO2 decreased the EC3 of DNCB to 0.015%. TiO2 NPs pre-treatment did not alter the lymphocyte subpopulations, but significantly increased the level of IL-4 and decreased IL-10 production in DNCB treated animals. In conclusion, our study demonstrates that administration of nano-TiO2 increases the dermal sensitization potency of DNCB, by augmenting a Th2 response, showing the immunomodulatory abilities of NPs.
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影响因子:
10.4
作者:
Long TC;Tajuba J;Sama P;Saleh N;Swartz C;Parker J;Hester S;Lowry GV;Veronesi B
通讯作者:
Veronesi B
影响因子:
14
作者:
Patlolla RR;Desai PR;Belay K;Singh MS
通讯作者:
Singh MS
影响因子:
1.6
作者:
Madsen, Jakob Torp;Vogel, Stefan;Nielsen, Jesper Bo
通讯作者:
Nielsen, Jesper Bo
影响因子:
5.5
作者:
GARRIGUE, JL;NICOLAS, JF;SCHMITT, D
通讯作者:
SCHMITT, D
影响因子:
14.2
作者:
Chan, Ray Chun-Fai;Wang, Meiying;Nel, Andre E.
通讯作者:
Nel, Andre E.