According to the World Health Organization, an estimated 422 million people worldwide have diabetes. Numerous studies have demonstrated that people with diabetes are at an increased risk of developing both acute and chronic pancreatitis, which increases the risk of developing pancreatic cancer.
Considering the lack of effective therapeutic options for pancreatitis and the limited treatment options for diabetes, researchers have recently turned to the potential of using mesenchymal stem cells (MSCs) as alternative therapeutic treatment options for these conditions.
In this review, Scuteri and Monfrini evaluate the different uses of MSCs for both the treatment of diabetes and the reduction of diabetes-related disease development.
According to the authors, MSCs offer several advantages, including the ability to be isolated from different tissues in a simple way, the ability to be easily harvested and expanded in vitro, and the absence of ethical problems associated with harvesting and use.
In addition, MSCs demonstrate the ability to differentiate, release soluble factors, and migrate toward lesions and sites of inflammation. Considering that inflammation and apoptosis are significant etiopathological factors of diabetes and pancreatitis, Scuteri and Monfrini indicate that MSCs are excellent candidates for regenerative medicine purposes.
In the case of MSCs and diabetes, research has demonstrated that differentiation of MSCs into insulin-releasing cells has been demonstrated in vitro after direct contact with pancreatic islets; the release of anti-inflammatory and antioxidant factors has improved the engraftment and prolonged the survival of transplanted pancreatic islets; and inhibited the apoptotic pathways triggered by endoplasmic reticulum stress in transplanted pancreatic islets. In analyzing this research, the authors conclude that the potential exists for the safe and effective use of MSCs for treatment of diabetes.
Although there has been growing interest in exploring the potential of MSCs on pancreatitis, there have only been a few studies exploring this therapeutic option. In these studies, the presence of MSCs was observed to reduce fibrosis and parenchymal damage by reducing proinflammatory factor expression.
In regard to MSCs and pancreatic cancer, since diabetes and pancreatitis are risk factors for the development of pancreatic cancer and considering MSCs have been found to hold potential as a therapeutic option for these diseases, using MSCs to interrupt the flow of factors leading to the development of pancreatic cancer should lower the incidence of diabetes-related pancreatic cancers.
The authors conclude that MSCs are a very promising therapeutic option for the treatment of diabetes, pancreatitis, and pancreatic cancer.
Nerve damage resulting from spinal cord injury (SCI) often leads to temporary or permanent loss of function and contributes to poor quality of life. Most common among males below 30 years of age, SCI recovery has been limited specifically as a result of the low growth capacity of neurons and a lack of nerve growth factors.
While current SCI treatment focuses on stabilizing the injured area and preventing secondary injury through a combination of surgery, pharmacological intervention, and rehabilitation, the success of treatment has been limited and unable to stimulate spinal cord regeneration.
Considering the limited success of confidential SCI treatments, several types of stem cells are currently being tested for the treatment of SCI, including mesenchymal stem cells (MSCs) isolated from bone marrow (BMSCs), umbilical cord (UC-MSCs), and adipose tissue (ADSCs).
In this review, Liau et al. discuss the current status of MSC therapy for SCI, criteria to consider when applying MSC therapy, and review novel biological therapies that can be used together with MSC therapy to enhance its therapeutic potential.
Based on the results of clinical trials, the authors conclude that MSC therapy is beneficial for SCI patients. While not all patients responded to MSC therapy, the authors note that observed improvement varied from patient to patient. In addition to discrepancies attributed to patient variations, source of MSC, route of stem cell administration, timing of cell administration, number of cell administrations, number of cells administered, and cell preparation methods were also observed to affect the efficacy of therapy.
Despite the delayed progress in phase III trials, there are several new therapeutic treatment strategies that incorporate stem cell secretory product-based therapy, including stem cell secretome therapy, scaffold-based therapy, and immunotherapy. The authors indicate that all of these novel therapeutic approaches may be able to be used in combination with MSC therapy to enhance the therapeutic efficacy of MSCs by improving cell survival, migration, engraftment, and proliferation.
The authors conclude this review by summarizing that, to date, MSC therapy has been demonstrated to be safe but unable to improve neurological function for all treated patients. Despite the limited success of this therapy, other studies are currently underway in an effort to improve the delivery of MSCs and MSC-derived products by utilizing scaffolds or by combining them with immunotherapy to improve the efficacy of the treatment.
Spinal cord injuries (SCI) are the most serious complication associated with spinal injuries and often result in permanent damage to the nervous system. With nearly 300,000 people in the United States living with SCI, the inability to treat these injuries has a significant impact on physical, mental, and financial health.
Additionally, while 94% of those suffering acute traumatic SCI survive initial treatment for the condition, both long-term survival and quality of life are often reduced as a result of post-injury complications. Further complicating the issue is the fact that the current standard of SCI treatment is designed only to reduce the secondary effects of injury and not directly promote healing through neuroregeneration.
Considering that mesenchymal stem cells (MSCs) are known to have anti-inflammatory properties, promote vascular regeneration, and to release neuro-nutrients, they are becoming increasingly promising as a potential treatment for SCI.
In this article, Xia et al. examine the evidence of pathophysiological changes occurring after SCI, review the underlying mechanisms of MSCs, summarize the potential application of MSCs in clinical practice, and highlight the challenges surrounding the use of MSCs in the treatment of SCI in future applications.
The goal of any SCI therapeutic treatment option is to promote rapid recovery of neurological function through a combination of medical and surgical interventions. However, to date, there are no optimal treatment strategies that allow for this goal to be met.
MSCs’ multidirectional differentiation capabilities are highly viable and known to provide structural support in SCI. In terms of using MSCs in the treatment of SCI, and specifically for their role as an anti-inflammatory agent, the most attractive aspect is their unique immunomodulatory ability.
Additionally, the goal of treatment after SCI is to repair the damaged nerve cells and restore nerve function. Studies exploring differentiation of MSCs after SCI have demonstrated spontaneously expressed neuromarkers at SCI sites and have allowed for recovery of neurological function.
The authors point out that traumatic SCI usually results in the direct destruction of blood vessels around the spinal cord which often results in ischemic necrosis and secondary injuries. Since promoting vascular recovery contributes to the recovery of motor function in patients with SCI, SCI vascular recovery is a new target for the treatment of SCI. Several studies have observed that MSCs secrete angiogenic factors that promote pericyte recruitment, a critical step in vascular maturation. The authors also report recent findings indicating that 57% of the vascular endothelial cells around the SCI of a mouse showed vascular regeneration effects after receiving MSC-EVs with an extensive vascular network formed around the injury over a period of 28 days.
Although MSCs are beneficial to the recovery of neurological function in patients with SCI, the authors call for additional research to focus on better understanding the SCI cellular mechanisms and MSC action for use in clinical practice. Additionally, Xia et al. point out that the survival rate and long-term survival of MSCs in the SCI microenvironment remain an unresolved issue.
MSCs repair SCI through anti-inflammatory effects and by promoting nerve axon regeneration and vascular regeneration. While further research is required to fully understand the mechanism underlying the effect of MSCs, the authors conclude the role of MSCs in treating SCI has been demonstrated in several clinical trials.
Source: “Mesenchymal stem cells in the treatment of spinal cord injury.”
Chronic skin inflammatory diseases, including atopic dermatitis (AD) and psoriasis, are considered uncontrolled responses to systemic inflammation.
Characterized by swelling, irritation, and rash chronic skin inflammatory disease, these common skin inflammatory diseases are estimated to affect 25% of the population, with AD and psoriasis being the most common form of the disease.
Recent methods used to treat AD and psoriasis have been based on inhibition, not regulation, of the condition. Over time, these methods of treatment can result in a number of side effects and drug resistance.
Considering that mesenchymal stem cells (MSCs) have been used to treat a number of immune diseases, Yang et al. believe they present as a promising treatment for chronic skin inflammatory disease. As part of this review, the authors discuss the therapeutic effects of MSCs on AD and psoriasis, provide clinical evaluation of the administration of MSCs, and present a comprehensive vision for the application of MSCs in future research and treatment.
AD and psoriasis are known to be systemic and immune-allergic inflammatory skin diseases caused primarily by the imbalance between pro- and anti-inflammatory factors. MSCs play a role in regeneration and immunomodulation and their function in skin lesions present in these conditions could provide important information about their biological function in the diseases.
Considering that inflammation related to both AD and psoriasis begins at the MSC level, a treatment designed to address abnormal MSCs can potentially improve the pathogenesis of these diseases. While this method appears promising, the authors point out that the therapeutic methods designed to treat lesions associated with MSCs have yet to be determined and treating skin inflammatory disease with these improved MSCs requires further clinical study.
The authors also highlight the potential benefit of preconditioning MCSs as a way to improve the immune regulation capacity in treating a range of immune diseases. Specifically, precondition MSCs have been shown to alleviate allergic inflammation in keratinocytes and reduce inflammation in the skin through the JAK-STAT pathway.
While the benefits associated with preconditioning MSCs for this purpose require further research, Yang et al. believe that preconditioning MSCs with inflammatory factors can more effectively treat skin inflammatory diseases.
In addition to showing the benefits of MSC therapy when treating AD and psoriasis, the authors of this review also point out some limitations associated with the application of MSCs. These limitations include the need for double-blind placebo-controlled studies to indicate the potential clinical application of MSCs in AD and psoriasis and issues with the production and cost of MSCs not being able to reach the standard (making it difficult to translate into clinical treatment).
Despite these limitations, the application of MSCs has shown to be more effective in treating AD and psoriasis than other options that are currently available.
Yang et al. conclude that the advancing technology for administering MSCs and their capability of regeneration, immunomodulation, and differentiation have made them a promising strategy for the treatment of skin inflammatory diseases. The authors also call for additional studies to further uncover the mechanisms of the therapeutic effects of MSCs in AD and psoriasis to help better define therapeutic strategies for treating these diseases.
Source: Yang J, Xiao M, Ma K, Li H, Ran M, Yang S, Yang Y, Fu X and Yang S (2023) Therapeutic effects of mesenchymal stem cells and their derivatives in common skin inflammatory diseases: Atopic dermatitis and psoriasis. Front. Immunol. 14:1092668. doi: 10.3389/fimmu.2023.1092668
With more than 17,000 people in the US sustaining a spinal cord injury (SCI) each year and an estimated combined cost to healthcare and the workforce exceeding $40 billion, the condition has significant personal and socioeconomic implications. In addition, SCIs have limited pharmacological treatment options to support the regeneration of nerve damage.
Considering the limited treatment options for this condition, the field of regenerative medicine, and specifically the use of stem cells, has recently drawn interest as a potential therapeutic treatment option for paralysis resulting from SCIs.
In this report, Bydon et al. summarize findings of the ongoing multidisciplinary phase 1 clinical trial exploring the safety and efficacy of intrathecal autologous adipose tissue-derived (AD) mesenchymal stem cells (MSCs) in patients with blunt, traumatic SCI.
Specifically, as part of this report, the authors describe the outcome of the first patient with C3-4 SCI treated with AD-MSCs. At the time of SCI, neurologic examination revealed complete loss of motor and sensory function below the level of injury; an injury diagnosed as an American Spinal Injury Association (ASIA) grade A SCI.
After undergoing initial treatment, including C2-6 posterior cervical decompression and fusion, improvement in motor and sensory function was demonstrable. However, neurological gains plateaued 6 months after sustaining injury.
Upon enrollment into the CELLTOP clinical trial 9 months after injury, the patient’s neurologic status was found to be ASIA grade C and imaging revealed bilateral myelomalacia at the C3 level and at the C2-6 decompression and fusion. Additionally, an open biopsy of adipose tissue found in the abdominal wall was performed 8 weeks prior to receiving an initial intrathecal injection.
After receiving an intrathecal injection of 100 million autologous AD-MSCs 11 months after injury, the patient was observed for clinical signs of efficacy at 3, 6, 12, and 18 months following injection.
Bydon et al. observed progressive improvement in upper extremity motor scores and considerable improvement in lower extremity scores at 18 months following injection. The patient also demonstrated consistent improvement in ASIA sensory score, including improvements in pinprick and light touch scores at follow-up after 18 months. The authors reported patient improvements in Capabilities of Upper Extremity score, quality of life (as measured by Global Health Score), and in physical and occupational therapy measures. Other than a moderate headache on day 2, no other safety issues or adverse events were reported.
While further clinical trial is required, the authors conclude that intrathecal AD-MSC administration may be a relatively noninvasive and safe therapeutic option for patients with SCI to improve their neurologic status after reaching a ceiling effect in terms of spontaneous recovery.
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