ABSTRACT
Papillary thyroid carcinoma (PTC) is one of the most common cancers of the endocrine system. Previous studies have shown that the extract of hull-less pumpkin seed (HLPS) has a significant anti-cancer effect. The aim of this study was to evaluate the effect of this plant extract on the proliferation of PTC cells. In this study, an extract of this plant was prepared by soxhlet extraction method and analyzed by Gas Chromatography-Mass Spectrometry. The cytotoxicity of PTX and plant extract was investigated using the methylthiazol tetrazolium (MTT) method. For careful investigation of morphological alteration, we used hematoxylin and eosin and Giemsa stinging. Based on MTT assay test, the IC 50 value of paclitaxel (PTX) was significantly less than the hydro-alcoholic extract of HLPS at all of the incubation time. Our results of histological staining showed that HLPS and PTX induced significant morphological alteration in the PTC cultured cell that consistent with cell death. Comparing the groups treated by PTX or HLPS with control group showed significant differences. It seems that HLPS extract has an apparent effect on treatment of PTC, at least in laboratory condition, albeit for realistic decision about the effect of HLPS on PTC, more molecular investigations are necessary.
ABSTRACT
Papillary thyroid carcinoma (PTC) is one of the most common cancers of the endocrine system. Previous studies have shown that the extract of hull-less pumpkin seed (HLPS) has a significant anti-cancer effect. The aim of this study was to evaluate the effect of this plant extract on the proliferation of PTC cells. In this study, an extract of this plant was prepared by soxhlet extraction method and analyzed by Gas Chromatography-Mass Spectrometry. The cytotoxicity of PTX and plant extract was investigated using the methylthiazol tetrazolium (MTT) method. For careful investigation of morphological alteration, we used hematoxylin and eosin and Giemsa stinging. Based on MTT assay test, the IC 50 value of paclitaxel (PTX) was significantly less than the hydro-alcoholic extract of HLPS at all of the incubation time. Our results of histological staining showed that HLPS and PTX induced significant morphological alteration in the PTC cultured cell that consistent with cell death. Comparing the groups treated by PTX or HLPS with control group showed significant differences. It seems that HLPS extract has an apparent effect on treatment of PTC, at least in laboratory condition, albeit for realistic decision about the effect of HLPS on PTC, more molecular investigations are necessary.
ABSTRACT
Spinal cord has a limited capacity to repair; therefore, medical interventions are necessary for treatment of injuries. Transplantation of Schwann cells has shown a great promising result for spinal cord injury [SCI]. However, harvesting Schwann cell has been limited due to donor morbidity and limited expansion capacity. Furthermore, accessible sources such as bone marrow stem cells have drawn attentions to themselves. Therefore, this study was designed to evaluate the effect of bone marrow-derived Schwann cell on functional recovery in adult rats after injury. Mesenchymal stem cells were cultured from adult rats' bone marrow and induced into Schwann cells in vitro. Differentiation was confirmed by immunocytochemistry and RT-PCR. Next, Schwann cells were seeded into collagen scaffolds and engrafted in 3 mm lateral hemisection defects. For 8 weeks, motor and sensory improvements were assessed by open field locomotor scale, narrow beam, and tail flick tests. Afterwards, lesioned spinal cord was evaluated by conventional histology and immunohistochemistry. In vitro observations showed that differentiated cells had Schwann cell morphology and markers. In this study, we had four groups [n = 10 each]: laminectomy, control, scaffold and scaffold + Schwann cells. Locomotor and sensory scores of cell grafted group were significantly better than control and scaffold groups. In histology, axonal regeneration and remyelination were better than control and scaffold groups. This study demonstrates that bone marrow-derived Schwann cells can be considered as a cell source for Schwann cells in SCI treatment
Subject(s)
Male , Animals, Laboratory , Schwann Cells , Spinal Cord Injuries , Rats, Wistar , Bone Marrow , Cell Differentiation , Immunohistochemistry , Reverse Transcriptase Polymerase Chain ReactionABSTRACT
This study was performed to determine whether melatonin at physiological concentrations [0.01-10nM] could affect the proliferation and osteogenic differentiation of Rat ADSCs in vitro. ADSCs were isolated from the fat of adult rats. After cell expansion in culture media and through three passages, osteogenesis was induced on a monolayer culture with osteogenic medium with or without melatonin at physiological concentrations [0.01-10nM]. After 4 weeks cultures were examined for mineralization by Alizarin Red S and von Kossa staining and for alkaline phosphatase [ALP] activity by ALP kit. Cell viability and apoptosis were also assayed by 3-[4, 5-dimethylthiazol-2-yl]-5-[3-carboxymethoxyphenlyl]-2-[4-ulfophenyl]-2H-tetrazolium assay and flowcytometry, respectively. All assays were performed in triplicate. The results indicated that at physiological concentrations, melatonin suppressed proliferation and differentiation of ADSCs. These data indicate that ADSCs exposed to melatonin, had a lower ALP activity in contrast to the cells exposed to the osteogenic medium alone. Similarly, the mineral deposition [calcium level] also decreased. The flow cytometry proved that the cell growth decreased and the apoptotic cells increased. These results suggest that physiological concentration of melatonin has a negative effect on ADSCs osteogenesis