Antitubercular Agents ; administration & dosage ; therapeutic use ; Biopsy, Needle ; methods ; Bronchi ; pathology ; Bronchoscopy ; methods ; Child, Preschool ; China ; Diagnosis, Differential ; Humans ; Lymph Nodes ; pathology ; Lymphatic Diseases ; diagnostic imaging ; pathology ; Mediastinum ; diagnostic imaging ; pathology ; Tomography, X-Ray Computed ; Tuberculosis, Pulmonary ; diagnostic imaging ; drug therapy ; pathology

Objective To study the antidepression action of curcumin and to explore its mechanism. Methods Mouse reserpine-induced depression model and mouse tetrabenazine-induced acquired despair model were used to observe the effect of curcumin on relieving depression. According to the hypothesis of monoamine, the effect of curcumin on activating monoamine, and inhibiting reuptake of monoamine neurotransmitters and monoamine oxidase inhibitor (MAOI) were observed. Results Curcumin in the dose of 50 mg/kg and more can relieve melancholic symptoms in mice induced by reserpine and tetrabenazine. Curcumin had no direct activation on monoamine either had no obvious inhibition on reuptake of monoamine neurotransmitters of noradrenalin, 5-hydroxytriptamine and dopamine . However, Curcumin had an obvious effect on improving rat forelimb spasm induced by tryptamine hydrochloride. Conclusion Curcumin acts like a kind of monoamine oxidase inhibitor, which exerts antidepression action by inhibiting monoamine oxidase activity and increasing the concentration of monoamine neurotransmitter in brain.

The capacity for neurogenesis in the adult mammalian brain is extremely limited and highly restricted to a few regions, which greatly hampers neuronal regeneration and functional restoration after neuronal loss caused by injury or disease. Meanwhile, transplantation of exogenous neuronal stem cells into the brain encounters several serious issues including immune rejection and the risk of tumorigenesis. Recent discoveries of direct reprogramming of endogenous glial cells into functional neurons have provided new opportunities for adult neuro-regeneration. Here, we extensively review the experimental findings of the direct conversion of glial cells to neurons in vitro and in vivo and discuss the remaining issues and challenges related to the glial subtypes and the specificity and efficiency of direct cell-reprograming, as well as the influence of the microenvironment. Although in situ glial cell reprogramming offers great potential for neuronal repair in the injured or diseased brain, it still needs a large amount of research to pave the way to therapeutic application.

The capacity for neurogenesis in the adult mammalian brain is extremely limited and highly restricted to a few regions, which greatly hampers neuronal regeneration and functional restoration after neuronal loss caused by injury or disease. Meanwhile, transplantation of exogenous neuronal stem cells into the brain encounters several serious issues including immune rejection and the risk of tumorigenesis. Recent discoveries of direct reprogramming of endogenous glial cells into functional neurons have provided new opportunities for adult neuro-regeneration. Here, we extensively review the experimental findings of the direct conversion of glial cells to neurons in vitro and in vivo and discuss the remaining issues and challenges related to the glial subtypes and the specificity and efficiency of direct cell-reprograming, as well as the influence of the microenvironment. Although in situ glial cell reprogramming offers great potential for neuronal repair in the injured or diseased brain, it still needs a large amount of research to pave the way to therapeutic application.
Animals ; Cellular Reprogramming ; Nerve Regeneration ; Neurogenesis ; Neuroglia ; Neurons

BACKGROUND:Spinal cord injury not only causes serious physical and psychological injuries to patients but also brings a heavy economic burden to society.Spinal cord injury is initially triggered by mechanical trauma,followed by secondary injuries,and as the disease progresses,a glial scar develops. OBJECTIVE:To summarize the pathological process of spinal cord injury and strategies for stem cell transplantation to repair spinal cord injury,aiming to provide the best protocol for treating spinal cord injury. METHODS:Computer search was used to search PubMed and CNKI databases.Chinese search terms were"stem cell transplantation,spinal cord injury".English search terms were"stem cell,spinal cord injury,spinal cord,mesenchymal stem cells,neural stem cells,pathophysiology,clinical trial,primary injury,secondary injury".The literature was screened according to the inclusion and exclusion criteria.Finally,91 articles were included for review analysis. RESULTS AND CONCLUSION:(1)The strategies for repairing spinal cord injury through stem cell transplantation can be divided into exogenous stem cell transplantation and endogenous stem cell transplantation.The exogenous stem cell transplantation strategy for the treatment of spinal cord injury is divided into four kinds:injecting stem cells into the site of injury;transplantation of biomaterials loaded with stem cells;fetal tissue transplantation;transplantation of engineered neural network tissue or spinal cord-like tissue.(2)Compared with a single treatment method,combination therapy can more effectively promote nerve regeneration and spinal cord function recovery.(3)Microenvironment regulating the injury site,magnetic stimulation,electrical stimulation,epidural oscillating electric field stimulation,transcription factor overexpression and rehabilitation therapy can be combined with stem cell transplantation for combination therapy,thereby promoting the recovery of spinal cord function.