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71.
Mohammad Ali Nilforoushzadeh Mehrak Zare Payam Zarrintaj Effat Alizadeh Ehsan Taghiabadi Maryam Heidari-Kharaji Mohammad Amir Amirkhani Mohammad Reza Saeb Masoud Mozafari 《Nanomedicine : nanotechnology, biology, and medicine》2019,15(1):70-85
Recent progress in hair follicle regeneration and alopecia treatment necessitates revisiting the concepts and approaches. In this sense, there is a need for shedding light on the clinical and surgical therapies benefitting from nanobiomedicine. From this perspective, this review attempts to recognize requirements upon which new hair therapies are grounded; to underline shortcomings and opportunities associated with recent advanced strategies for hair regeneration; and most critically to look over hair regeneration from nanomaterials and pluripotent stem cell standpoint. It is noteworthy that nanotechnology is able to illuminate a novel path for reprogramming cells and controlled differentiation to achieve the desired performance. Undoubtedly, this strategy needs further advancement and a lot of critical questions have yet to be answered. Herein, we introduce the salient features, the hurdles that must be overcome, the hopes, and practical constraints to engineer stem cell niches for hair follicle regeneration. 相似文献
72.
Besides the receptor-mediated effects of pioglitazone, the involvement of nitric oxide (NO) has been previously demonstrated in some pioglitazone-induced central and peripheral effects. In the present study, the effects of acutely administered pioglitazone on pentylenetetrazole (PTZ)-induced seizures and involvement of NO were evaluated in mice. To determine the threshold for clonic seizures, PTZ was administered intravenously. A single dose of pioglitazone (10, 20, 40 and 80 mg/kg, p.o.) was administered either 2 or 4h prior to induction of seizures. For determination of possible role of peroxisome proliferator activated receptor gamma (PPAR-γ) and nitric oxide pathway in this effect, the effects of a PPAR-γ antagonist, GW9662 (2 mg/kg); a non-specific nitric oxide synthase (NOS) inhibitor, NG-nitro-L-arginine methyl ester (L-NAME; 0.3, 1, 3, and 10 mg/kg); a specific iNOS inhibitor, aminoguanidine (100mg/kg, i.p.) or a nitric oxide precursor, L-arginine (30, 60, 100 and 200mg/kg, i.p.); each administered 15 min prior to pioglitazone, were investigated on the anticonvulsant effect of this drug. Administration of pioglitazone (40 and 80 mg/kg) increased the threshold of PTZ-induced seizure in a dose-dependent, and time-dependent manner. GW9662 reversed the anticonvulsant effect of pioglitazone (40 mg/kg). Acute administration of L-NAME (1, 3 and 10mg/kg) inhibited the anticonvulsant effect of pioglitazone (40 mg/kg), the same result was detected with aminoguanidine (100mg/kg); whereas L-arginine, in the noneffective dose (100mg/kg), potentiated the seizure threshold when co-administered with a subeffective dose of pioglitazone (20mg/kg). CONCLUSION: The present study demonstrates the anticonvulsant effect of acute pioglitazone on PTZ-induced seizures in mice. This effect was reversed by PPAR-γ antagonist, and both a specific- and a non-specific nitric oxide synthase inhibitors, and augmented by nitric oxide precursor, L-arginine. These results support that the anticonvulsant effect of pioglitazone is mediated through PPAR-γ receptor-mediated pathway and also, at least partly, through the nitric oxide pathway. 相似文献