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Gene & Protein in Disease                                          Chinese herbs and stem cells in neurology



            traumas manifest across diverse cell types, encompassing   2. Application of stem cell in treatment
            embryonic stem cells (ESCs), neural stem cells (NSCs),   of neurologic disorders: advantages and
            mesenchymal stem cells (MSCs), and induced pluripotent   disadvantages
            stem cells (iPSCs). Experimental investigations conducted
            in vitro, in vivo, and through clinical trials are undertaken   Stem cell-based therapy, a key aspect of regenerative
            to elucidate the therapeutic efficacy for a range of   medicine, has garnered significant attention due to its
            neurological afflictions. 3,4                      potential to provide new treatment options for patients
                                                               with previously untreatable diseases. As a result, thousands
              The research and assessment of stem cells alongside various
            delivery methodologies are currently underway to evaluate   of clinical trials have been initiated, addressing a wide
                                                               range of medical issues, including musculoskeletal and
            their potential  application in clinical settings  pertaining   neurological disorders, immune diseases, blood disorders,
            to  amyotrophic lateral  sclerosis  (ALS) and  additional   and degenerative conditions.  However, some trials have
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            neurodegenerative disorders, including Alzheimer’s disease   not demonstrated clinical benefits, likely due to inherent
            (AD), Huntington’s disease, Parkinson’s disease (PD), and
            cerebrovascular accidents.  Previous investigations have   limitations of stem cell therapy. These limitations include
                                 5,6
                                                               infusion toxicity, immunogenicity, tumorigenic potentials,
            demonstrated that the introduction of stem cells into animal   and ethical concerns. 18
            models afflicted by neurodegenerative disorders has the
            potential to enhance the morphology of existing neurons.   Stem cells are unspecialized cells present during the
            This process promotes the substitution of novel cells,   embryonic, fetal, and adult phases of life, which develop
            which subsequently release  trophic  factors and  modulate   into specialized cells that make tissues and organs. In
                               7,8
            inflammatory responses.  Two distinct categories of stem   post-natal and adult stages, tissue-specific stem cells
            cell-based therapeutic interventions have been delineated   reside within differentiated organs and play a key role in
            to date: the first category encompasses the stimulation or   repairing injuries. The key characteristics of stem cells are
            enhancement  of  endogenous  neural  progenitor cells  to   potency, which allows them to differentiate into multiple
            facilitate an augmented secretion of trophic factors and   cell types. These traits can vary among different stem
            growth molecules conducive to tissue regeneration, while   cells. For instance, ESCs derived from the blastocyst stage
            the second category is centered on the transplantation of   exhibit greater self-renewal and potency, while adult tissue
                             9,10
            exogenous stem cells.  Since many medications are not   stem cells have restricted self-renewal capability and can
            very effective and may induce side effects, the development   only differentiate into specific tissue cells. 19
            of new drugs based on phytochemicals is gaining attention. 11  Among the various types of stem cells, pluripotent
              Traditional Chinese medicine (TCM), a major      stem cells (PSCs) are distinguished by their exceptional
            alternative medicine, is  widely practiced in Chinese   capacity to divide and differentiate into any cell type
            communities and  accepted  in Western medicine. While   within an organism, including embryonic structures, but
            the exact origins of TCM are unknown, archeological   are not capable of forming extra-embryonic structures
            discoveries revealed that acupuncture needles and a   like the placenta; examples include ESCs derived from
            few herbs have been applied for approximately 4000 –   preimplantation embryos and iPSCs, which are generated
            8000 years.  TCM’s holistic approach to neurodegenerative   from adult cells reprogrammed to an embryonic-like state.
                     12
            diseases leverages the synergistic effects of multiple herbal   PSCs vary in their potency, ranging from fully pluripotent
            components to target systemic organs. For instance, herbs   cells to those with reduced potency, such as multi-, oligo-,
            such as curcumin and resveratrol are used to improve   or uni-potent cells. iPSCs, created from somatic cells,
            memory,  while quercetin is believed to enhance cognitive   exhibit similar function to PSCs and offer significant
                   13
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            function.  Research has demonstrated that monomers,   potential for regenerative medicine. Their activity is often
            botanical extracts, or combinations of Chinese herbal   assessed using the teratoma formation assay. 20,21
            monomers, as well as instruments utilized in traditional   Recent advancements in stem cell biology have enabled
            Chinese medicine, possess the capability to modulate stem   the differentiation of PSCs, such as ESCs and iPSCs,
            cell proliferation and differentiation to a certain degree. 15,16  into neural progenitor or NSC-like cells for therapeutic

              The primary aim of this scholarly article is to enhance   purposes. NSCs, being the most logical choice for treating
            the body of research pertaining to the application of   neurological  disorders,  are  unfortunately  located  deep
            TCM in the modulation of stem cell proliferation and   within the adult brain, making them inaccessible for
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            differentiation within the context of neurodegenerative   harvesting and autologous therapeutic applications.  One
            disorders. In pursuit of this objective, the article elucidates   significant advantage of PSCs is their ability to proliferate
            the implications of TCM on stem cell behavior.     indefinitely, allowing for the production of billions of various


            Volume 4 Issue 2 (2025)                         2                               doi: 10.36922/gpd.4835
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