Patterns of antiemetic prophylaxis for chemotherapy-induced nausea and vomiting in China

Background： Few studies have attempted to evaluate the use of antiemetic therapy for chemotherapyinduced nausea and vomiting （CINV） at a national level in China or to assess how treatment regimens adhere to current guidelines. Methods： We searched the China Health Insurance Research Association （CHIRA） Database to identify patients with cancer who were 〉 18 years old and received either moderately or highly emetogenie chemotherapy （MEC and HEC, respectively） between 2008 and 2012. Patients＇ characteristics as well as usage of specific antiemetic regimens were analyzed using descriptive statistics. Results： Of the 14,548 patients included in the study, 6,477 received HEC while 8,071 were treated with MEC. Approximately 89.9% used antiemetics prophylactically to prevent acute CINV and 71.5% for delayed CINV while 9.0% were prescribed antiemetics as rescue therapy. A significantly lower proportion of patients treated with HEC received prophylactic antiemetic therapy for delayed CINV as compared to those treated with MEC （59.4% vs. 81.3 %; P〈0.001）. The HEC group had a slightly lower proportion of patients using a mixed regimen containing a 5-HT3 antagonist to prevent both acute and delayed CINV than the MEC group （P〈0.012）; however, a higher proportion received a mixed regimen containing eorticosteroids （P≤0.007）. Although more than half of the patients in the HEC group took three antiemeties to prevent acute and delayed CINV, these rates were significantly lower than those of the MEC group （both P〈0.001）. Finally, analysis of the regimens used revealed that there is over-utilization of drugs within the same class of antiemetic. Conclusions： These findings indicate that more attention is needed for treatment of delayed CINV, in terms of both overall use and the components of a typical treatment regimen.

Effect of transcutaneous electrical acupoint stimulation combined with palonosetron on chemotherapy-induced nausea and vomiting: a single.blind,randomized, controlled trial

Background: Chemotherapy?induced nausea and vomiting adversely affects the quality of life of patients who receive chemotherapy via intravenous infusion or transcatheter arterial chemoembolization(TACE). This study aimed to investigate the clinical effects of transcutaneous electrical acupoint stimulation(TEAS) on nausea and vomiting after TACE.Methods: A total of 142 patients who received TACE with cisplatin for primary or metastatic liver cancer were assigned to the active?acupuncture(n = 72) or placebo?acupuncture(n Hegu(LI4), Neiguan(P6), an= 70) groups using a covariate?adaptive randomization at a ratio of 1:1. The acupointsd Zusanli(ST36) were stimulated twice daily for 6 days. The effects of TEAS on nausea and vomiting were assessed by using occurrence rate and severity of these symptoms. Anorexia scale and M. D. Anderson Symptom Inventory(MDASI) scores were secondary endpoints and were used to assess the effect of TEAS on patient appetite and quality of life. The safety of the treatments was also monitored.Results: Between the two groups, the differences in occurrence rates and severities of nausea and vomiting after TACE were not significant(all P > 0.05). From the second day after TACE, anorexia scores were significantly lower in the active?acupuncture group than in the placebo?acupuncture group and continued to decrease over time with treat?ment(all P values less than 0.01). On days 0, 1, and 2, the mean MDASI scores for the active?acupuncture group were slightly lower than those for the placebo?acupuncture group, but the differences were not statistically significant(all P > 0.05). No significant differences were found between the two groups in the occurrence rate of any adverse event(P > 0.05).Conclusion: TEAS appears to be a safe and effective therapy to relieve patients' gastrointestinal discomfort after chemotherapy.

Association between operative position and postoperative nausea and vomiting in patients undergoing laparoscopic sleeve gastrectomy

BACKGROUND Bariatric surgery is one of the most effective ways to treat morbid obesity,and postoperative nausea and vomiting(PONV)is one of the common complications after bariatric surgery.At present,the mechanism of the high incidence of PONV after weight-loss surgery has not been clearly explained,and this study aims to investigate the effect of surgical position on PONV in patients undergoing bariatric surgery.AIM To explore the effect of the operative position during bariatric surgery on PONV.METHODS Data from obese patients,who underwent laparoscopic sleeve gastrectomy(LSG)in the authors’hospital between June 2020 and February 2022 were divided into 2 groups and retrospectively analyzed.Multivariable logistic regression analysis and the t-test were used to study the influence of operative position on PONV.RESULTS There were 15 cases of PONV in the supine split-leg group(incidence rate,50%)and 11 in the supine group(incidence rate,36.7%)(P=0.297).The mean operative duration in the supine split-leg group was 168.23±46.24 minutes and 140.60±32.256 minutes in the supine group(P<0.05).Multivariate analysis revealed that operative position was not an independent risk factor for PONV(odds ratio=1.192,95%confidence interval:0.376-3.778,P=0.766).CONCLUSION Operative position during LSG may affect PONV;however,the difference in the incidence of PONV was not statistically significant.Operative position should be carefully considered for obese patients before surgery.

Effect of music therapy on chemotherapy-induced nausea and vomiting in gastrointestinal cancer:A systematic review and metaanalysis

BACKGROUND Chemotherapy is the primary treatment for patients with advanced gastrointestinal cancer,but it has many adverse reactions,particularly nausea and vomiting.Music therapy can reduce anxiety symptoms,avoid the response to the human body under various stress conditions through psychological adjustment,and improve the adverse reactions of chemotherapy.AIM To investigate the impact of music therapy on relieving gastrointestinal adverse reactions in chemotherapy for patients with digestive tract cancer by metaanalysis.METHODS EMBASE,PubMed,OVID,WoS,CNKI,CBM,and VIP database were all used for searching relevant literature,and the efficacy after treatment was combined for analysis and evaluation.RESULTS This study included seven articles.The results of meta-analysis indicated that music therapy could reduce the nausea symptom score of patients after chemotherapy[mean difference(MD)=-3.15,95%confidence interval(CI):-4.62 to-1.68,Z=-4.20,P<0.0001].Music therapy could reduce the vomiting symptom score of patients after chemotherapy(MD=-2.28,95%CI:-2.46 to-2.11,Z=-25.15,P<0.0001).Furthermore,music therapy could minimize the incidence of grade I and above nausea or vomiting in patients after chemotherapy(odds ratio=0.38,95%CI:0.26-0.56,Z=-4.88,P<0.0001).Meta-regression analysis found that publication year was not a specific factor affecting the combined results.There was no significant publication bias(P>0.05).CONCLUSION Music therapy can significantly improve the scores of nausea and vomiting symptoms in patients with digestive system cancer during chemotherapy and reduce the incidence of grade I and above nausea and vomiting after chemotherapy,making it an effective psychological intervention method worthy of clinical promotion.

Comprehensive interventions for adult cyclic vomiting syndrome complicated by superior mesenteric artery syndrome:A case report

BACKGROUND Cyclic vomiting syndrome(CVS)is a chronic functional gastrointestinal disorder involving the gut–brain interaction that is characterized by recurring episodes of nausea,vomiting,abdominal pain,and interspersed complete normal periods.Superior mesenteric artery(SMA)syndrome(SMAS)is a vascular condition in which the horizontal portion of the duodenum is compressed due to a reduced angle between the aorta and the SMA.This condition presents with symptoms similar to CVS,posing challenges in distinguishing between the two and often resulting in misdiagnosis or inappropriate treatment.CASE SUMMARY A 20-year-old female patient presented with recurrent episodes of vomiting and experienced a persistent fear of vomiting for the past 2 years.She adopted conscious dietary restrictions,which led to severe malnutrition.Initially,she was diagnosed with SMAS,as revealed by computed tomography angiography.Despite efforts to increase the angle between the aorta and the SMA through weight gain,her vomiting did not improve.Finally,she was diagnosed with comorbidities including CVS,SMAS and anxiety disorder.She underwent comprehensive interventions,including enteral and parenteral nutritional supplementation,administration of antiemetic and anti-anxiety agents,and participation in mindfulness-based cognitive therapy.The patient eventually experienced a notable improvement in both body weight and clinical symptoms.CONCLUSION We present a rare case of CVS in an adult complicated with SMAS and propose additional treatment with nutritional support,pharmacological intervention,and psychotherapy.

Evaluation of Adherence to Chemotherapy-Induced Nausea and Vomiting Guidelines. An Observational Study

Objective: To describe the prescribing trends of antiemetics in chemotherapy-induced nausea and vomiting (CINV), assess adherence to American Society of Clinical Oncology (ASCO) guidelines, and evaluate the effectiveness of prescribed antiemetics. Additionally, we also sought to explore barriers that hinder clinical practice guideline (CPG) implementation. Methods: One hundred fifty-five patients between the ages of 18 and 60 who were admitted to the haematology/oncology department/clinic to receive intravenous chemotherapy, either as in-patients or outpatients, were enrolled in a prospective observational study. Relevant patient demographic data, chemotherapy protocols and antiemetics were collected. Chemotherapies were classified according to their emetogenic potential. This information was used to assess whether the antiemetic prescribed matched the emetogenic risk of treatment. The analysis of outcomes was performed using the MASCC antiemetic assessment tool. Key Findings: The results showed that 95% of antiemetic prescription pre-chemotherapy regimens did not adhere to the guidelines. The findings were use of twice the recommended dose of granisetron (87.7%), overuse granisetron (16%) and metoclopramide (62.6%), and underuse dexamethasone (27%) and corticosteroid duplication (7.7%). With respect to post-chemotherapy antiemetic prescriptions, 91% of prescriptions were not adherent to guidelines, with overuse of granisetron (81.9%) and metoclpramide (34.2%) and underuse of dexamethasone (66.5%) being the most frequently reported trends. Conclusion: This study shows a lack of conformity to antiemetic guidelines, resulting mainly in overtreatment. Although vomiting was well-managed, nausea remains under controlled and requires additional medical attention. The lack of knowledge and motivation are considered barriers to CPG implementation.

Propofol with Varied Functions: A Potential Therapeutic Opportunity for Postoperative Nausea, Vomiting and Pruritus—A Narrative Review

Background: Despite the advances in anesthetics and non-pharmacological techniques, the prevalence of postoperative nausea and vomiting in all patients remains high. It is one of the most common distressing symptoms that cause dissatisfaction among patients after anesthesia and surgery. A sub-hypnotic dose of propofol has been shown to reduce morphine-induced postoperative nausea, vomiting, and pruritus. This review article will provide sufficient knowledge on the role of propofol in minimizing opioid-induced postoperative nausea, vomiting, and pruritus by providing detailed information on propofol antiemetic and antipruritic effects, as well as discussions based on empirically available data. Method: We conducted a narrative review of the literature published between 1990 and 2023 from a range of databases;PubMed, BioMed Central, Biosis Previews, Nature, International Pharmaceutical Abstracts, Springer-Link, and Elsevier. Discussion and Conclusion: The literatures reviewed in this study have demonstrated that propofol may have diverse therapeutic effects including antiemetic and antipruritic. The antiemetic effect of propofol may be an effective therapeutic approach for the prevention of postoperative nausea and vomiting. The literature also demonstrated that the use of propofol for sedation during surgery may as well ameliorates opioids induced postoperative pruritus, which may be beneficial to surgical patients. Also, it was demonstrated that prophylactic use of propofol may be an effective way of preventing nausea and vomiting and pruritus during opioid use.

Application of PC6 Stimulation in the Prevention and Treatment of Postoperative Nausea and Vomiting in Ambulatory Surgery

Postoperative nausea and vomiting (PONV) is a common complication in ambulatory surgery patients, which affects their quality of life and recovery process. In recent years, acupuncture stimulation as a non-pharmacological therapy has shown significant efficacy in the prevention and treatment of PONV. This review mainly discusses the current research on using PC6 stimulation to prevent PONV in ambulatory surgery patients, elucidates the various effects and mechanisms of PC6 stimulation, analyzes the advantages and disadvantages, safety, and feasibility of different stimulation methods, aiming to improve the postoperative recovery quality of ambulatory surgery patients, reduce medical costs, and promote the application of integrative medicine in the prevention and treatment of PONV.

Correct understanding and intervention of postoperative nausea and vomiting can provide reference for clinical practice

In this editorial,we reviewed the article by Li et al.We aimed to explore various perspectives to further mitigate the risk factors for postoperative nausea and vomiting(PONV),which could significantly reduce its incidence and related post-operative complications.PONV is highly prevalent among patients undergoing bariatric surgery,yet there are relatively few related studies.Currently,the main-stream bariatric surgery methods include laparoscopic Roux-en-Y gastric bypass and laparoscopic sleeve gastrectomy.Despite the effectiveness of surgery in helping patients lose weight,postoperative PONV may occur,potentially leading to various complications(such as aspiration and wound dehiscence).A retro-spective study by Li et al has compared the impact of different operative positions during laparoscopic sleeve gastroplasty on the incidence of PONV,providing new insights into the clinical practice aimed at reducing PONV incidence and thereby improving patient’s postoperative experience.

The Effects of Acupressure on Vomiting, Stress, and Anxiety in Chinese Pregnant Women with Hyperemesis Gravidarum

Objective:To investigate the role of acupressure therapy in helping pregnant women with HG reduce the frequency or severity of vomiting and relieve stress and anxiety.Method:A quantitative study with a quasi-experimental design and non-equivalent group design was used.Sixty-six valid data points were obtained from pregnant mothers diagnosed with HG in a general hospital in Linyi City.These pregnant women received either acupressure(n=33)or general therapeutic care(n=33).They completed standardized questionnaires designed to assess vomiting,anxiety,and stress levels.Results:Data showed no differences between the experimental and control groups before the intervention.After the intervention,there were significant differences in anxiety(P≤0.05)and stress(P≤0.05)scores between the two groups.However,there was no significant difference in vomiting scores(P>0.05)between the two groups after the intervention.The anxiety and stress scores of the experimental group were significantly lower than those of the control group post-intervention,while the vomiting scores of the two groups were similar.Conclusion:The findings suggest that acupressure significantly reduces anxiety and stress in pregnant women with hyperemesis gravidarum(HG)and also helps reduce vomiting.Acupressure presents a viable clinical option for pregnant women seeking relief from HG symptoms.

GRANISETRON COMPARED WITH ONDANSETRON PLUS DEXAMETHASONE IN THE PREVENTION OF NAUSEA AND VOMITING INDUCED BY A INTENSELY EMETOGENIC CHEMOTHERAPY REGIMEN:A RANDOMIZED CROSS-OVER STUDY

Fifty-two patients with chemotherapy comprise cisplatin, adriamycin and dacarbazine underwent antiemetic therapy form September 1994 to June 1995. The chemotherapy regimens include CAP-VDS, ACO, EP,CHOP, AMF and MFP. The dose of PDD was 60-70 mg/M2, ADR was 4050 mg/M2 and DTIC was 300 mg/M2.This study was the randomized, cross-over study, ruled out any differences between individual patients. Group A: Granisetron was given on the first day of chemotherapy, Granisetron 3 mg, Dexamethasone 10 mg i.v. at 30 minutes before chemotherapy, Group B:Ondansetron was given on the first and second days,Ondansetron 8 mg, Dexamethasone 10 mg i.v. at 30 minutes before chemo-therapy, The rates of complete control-free of vomiting were 80.8 % and 82.7% in both groups respectively at 24 hours(P>0.05), 57.7% and 53.9% respectively(M>0.05) at second day, and 67.3% and 53.9% respectively(P<0.05) at third day. No difference was observed between both groups for the result of antiemetic control in seven days, the rate of overall control are 82.7% and 80.8% respectively(P>0.05).Adverse events with both antiemetic treatments were mild(essentially headache), the percentage of headache with ondansetron was 9.5% and granisetron 7.7%, constipation with ondansetron was 80.8%and granisetron 61.5%.Constipation: Granisetron, given as one i.v. 3 mg injection before chemotherapy plus dexamethasone, and ondansetron, given intravenously 8 mg injection before chemotherapy at the first 2 days Plus dexamethasone are similar results on acute and dalayed chemotherapyinduced vomiting in patients receiving their intensely emetogenic regimen.

Treatment of spinal cord injury with biomaterials and stem cell therapy in non-human primates and humans

Spinal cord injury results in the loss of sensory,motor,and autonomic functions,which almost always produces permanent physical disability.Thus,in the search for more effective treatments than those already applied for years,which are not entirely efficient,researches have been able to demonstrate the potential of biological strategies using biomaterials to tissue manufacturing through bioengineering and stem cell therapy as a neuroregenerative approach,seeking to promote neuronal recovery after spinal cord injury.Each of these strategies has been developed and meticulously evaluated in several animal models with the aim of analyzing the potential of interventions for neuronal repair and,consequently,boosting functional recovery.Although the majority of experimental research has been conducted in rodents,there is increasing recognition of the importance,and need,of evaluating the safety and efficacy of these interventions in non-human primates before moving to clinical trials involving therapies potentially promising in humans.This article is a literature review from databases(PubMed,Science Direct,Elsevier,Scielo,Redalyc,Cochrane,and NCBI)from 10 years ago to date,using keywords(spinal cord injury,cell therapy,non-human primates,humans,and bioengineering in spinal cord injury).From 110 retrieved articles,after two selection rounds based on inclusion and exclusion criteria,21 articles were analyzed.Thus,this review arises from the need to recognize the experimental therapeutic advances applied in non-human primates and even humans,aimed at deepening these strategies and identifying the advantages and influence of the results on extrapolation for clinical applicability in humans.

Non-pharmacological management for chemotherapy-induced nausea and vomiting in patients with cancer:a scoping review

Objective:This review aimed to map and summarize published studies that tested non-pharmacological management for chemotherapyinduced nausea and vomiting(CINV).Methods:We searched for eligible studies in 5 electronic databases and screened the retrieved studies using the inclusion and exclusion criteria.Data were then collated according to the types of interventions,measurement tool,and outcomes.Results:The search yielded 2343 records,of which 11 were included.Four categories of non-pharmacological CINV management were made;manipulative and body-based therapy(n=5 studies);mind–body therapy(n=3 studies);biologically based practice(n=1 study),and energy therapy(n=2 studies).Seven different scales were used to measure CINV.Nine studies repor ted improvement in CINV.Conclusions:This scoping review demonstrates the breadth of non-pharmacological management to address CINV.Various types of CINV scales were used to measure CINV severity.The management and scale can be utilized to improve nursing care,par ticularly in cancer care.

Optimizing care for gastric cancer with overt bleeding:Is systemic therapy a valid option?

Gastric cancer(GC)and gastroesophageal junction cancer(GEJC)represent a significant burden globally,with complications such as overt bleeding(OB)further exacerbating patient outcomes.A recent study by Yao et al evaluated the effectiveness and safety of systematic treatment in GC/GEJC patients presenting with OB.Using propensity score matching,the study balanced the comparison groups to investigate overall survival and treatment-related adverse events.The study's findings emphasize that systematic therapy can be safe and effective and contribute to the ongoing debate about the management of advanced GC/GEJC with OB,highlighting the complexities of treatment decisions in these high-risk patients.

Auricular therapy for chemotherapy-induced nausea and vomiting in cancer patients:Perspectives from the traditional zang-fu organs and meridians theory

This paper presents the theoretical background of using auricular therapy(AT)for managing chemotherapy-induced nausea and vomiting(CINV)from the perspectives of traditional zang-fu organs and meridian theory.The zang-fu organs of stomach,spleen and liver play a crucial role in regulating the gastrointestinal functions.The chemotherapeutic agents can significantly impede the gastrointestinal functions and subsequently contribute to various gastrointestinal symptoms including nausea and vomiting.Dysfunctions of the stomach,spleen and liver can correspond to specific auricular acupoints,while by stimulating those acupoints,the chaotic Qi movement can be reversed to its normal status,and the hyperactivities of the gastrointestinal system can also be alleviated to reduce the CINV symptoms.Clinical studies based on such theory have well supported the effects of AT on CINV.However,relationships between the traditional theory and the modern medicine understanding of the CINV mechanisms remain unknown and should be further explored in future research.

Effectiveness of a novel, fixed dose combination of netupitant and palonosetron in prevention of chemotherapy induced nausea and vomiting: A real-life study from India

BACKGROUND A new,oral fixed dose combination of highly selective neurokinin-1 receptor antagonist,netupitant with 5HT3 receptor antagonist,netupitant and palonosetron(NEPA)was approved in India for prevention of chemotherapy induced nausea and vomiting(CINV).AIM To assess effectiveness of NEPA in real-world scenario.METHODS We retrospectively assessed the medical records and patient dairies of adult patients who received highly emetogenic or moderately emetogenic chemotherapy(HEC/MEC)and treated with NEPA(Netupitant 300 mg+Palanosetron 0.50 mg)for prevention of CINV.Complete response(CR)was defined as no emesis or no requirement of rescue medication in overall phase(0 to 5 d),acute phase(0-24 h)and delayed phase(2 to 5 d).RESULTS In 403 patients included in the analysis,mean age was 56.24±11.11 years and 55.09%were females.Breast cancer(25.06%)was most common malignancy encountered.HEC and MEC were administered in 54.6%and 45.4%patients respectively.CR in overall phase was 93.79%whereas it was 98.01%in acute CINV and 93.79%in delayed CINV.Overall CR in HEC and MEC groups was 93.63%and 93.98%respectively.CR was more than 90%in different chemotherapy cycles except in group of patients of cycle 4 where CR was 88.88%.CONCLUSION NEPA is a novel combination that is effective in preventing CINV in up to 93%cases treated with highly emetogenic or moderately emetogenic chemotherapy.This study brings the first real-life evidence of its effectiveness in India population.

Controlling Chemotherapy-Induced Nausea and Vomiting with Neurokinin-1 Receptor Antagonists in Patients on AC-Based Chemotherapy—Are We There Yet?

Chemotherapy-induced nausea and vomiting (CINV) are distressing side effects of chemotherapy. Neurokinin-1 receptor antagonists (NK1-RAs) have been incorporated in the contemporary management of CINV. However, clinical studies on NK1-RAs have shown mixed results in reducing CINV risk. Most studies focused on the use of aprepitant (APR) and casopitant (CAS) in breast cancer patients receiving AC-type (doxorubicin and cyclophosphamide) chemotherapy. In this study, we compared the study design and clinical efficacies of these NK1-RAs in reducing CINV risk. Among the selected eight studies, 4 APR Randomized Controlled Trials (RCTs), 2 APR Observational Studies (OSs) and 2 CAS RCTs were identified. Patient-related characteristics such as the proportion of females (60.0% - 100.0%), age (46.5 - 59.5 years), histories of motion (5.6% - 47.0% in NK1-RA arms) and morning sicknesses (14.2% - 45.0% in NK1-RA arms) and types of antiemetic regimens;as well as chemotherapy-related characteristics such as the proportion of patients on AC chemotherapy (15.0% - 100.0%) varied greatly. In terms of efficacies, both APR and CAS improved overall CR and vomiting in majority of the studies. None of the studies, however, demonstrated that NK1-RA could provide adequate nausea control. To conclude, NK1-RAs are effective in improving vomiting and overall CR, but not useful in controlling nausea or attaining CC, the ideal CINV endpoint. A shift in paradigm is needed for future CINV research. As healthcare providers continue to strive for optimum CINV control in their patients, we hope this review can help them make better informed clinical decisions.

Acupuncture Treatment of Vomiting Caused by Chemotherapy

Chemotherapy is mainly used for treating malignant tumor. However, some patients can not withstand the side effects in the digestive system and had to abandon the treatment. In order to prevent vomiting, antiemetics, such as metoclopramide and ondansetron (a new kind of antiemetic), are used. But some patients still vomit after taking these drugs. Moreover, drugs like ondansetron are very expensive for many patients. Since March 1999, we have applied acupuncture to prevent vomiting caused by chemotherapy with satisfactory results. The following is a report of 34 cases observed.

Role of progressive muscle relaxation in preventing and alleviating of nausea and vomiting caused by chemotherapy among cancer patients: A protocol of systematic review

Background and aim:Progressive muscle relaxation(PMR)is one of the most common complementary and alternative therapies.Published systematic review unfolded that PMR has a positive impact on chemotherapy-induced nausea and vomiting among adult cancer patients.However,the pooled findings were not reliable and valid because included trials have poor quality.It must be noted is that additional studies with good quality have been published recently.So,we design this updated systematic review to comprehensively establish the efficacy of PMR for the of chemotherapy-induced nausea and vomiting among cancer patients.Methods:We will search PubMed,Cochrane Controlled Register of Trial(CENTRAL),Cumulative Index to Nursing and Allied Health Literature(CINAHL),China Biomedical Literature database(CBM),China National Knowledge Infrastructure(CNKI),and Wanfang data to capture all potential items.Data extraction sheet will be used to extract all essential information,the Cochrane risk of bias assessment tool will be utilized to appraise the risk of bias of eligible studies.Finally,a quantitative analysis will be performed if sufficient data were obtained.In contrast,a qualitative analysis will be used to summarize the results of all included studies.Ethics and dissemination:Ethics approval and patient written informed consent will not be required because all of the analyses in the present study will be performed based on data from published studies.We will submit our systematic review and network meta-analysis to a peer reviewed scientific journal for publication.

Human induced pluripotent stem cell-derived therapies for regeneration after central nervous system injury

In recent years,the progression of stem cell therapies has shown great promise in advancing the nascent field of regenerative medicine.Considering the non-regenerative nature of the mature central nervous system,the concept that“blank”cells could be reprogrammed and functionally integrated into host neural networks remained intriguing.Previous work has also demonstrated the ability of such cells to stimulate intrinsic growth programs in post-mitotic cells,such as neurons.While embryonic stem cells demonstrated great potential in treating central nervous system pathologies,ethical and technical concerns remained.These barriers,along with the clear necessity for this type of treatment,ultimately prompted the advent of induced pluripotent stem cells.The advantage of pluripotent cells in central nervous system regeneration is multifaceted,permitting differentiation into neural stem cells,neural progenitor cells,glia,and various neuronal subpopulations.The precise spatiotemporal application of extrinsic growth factors in vitro,in addition to microenvironmental signaling in vivo,influences the efficiency of this directed differentiation.While the pluri-or multipotency of these cells is appealing,it also poses the risk of unregulated differentiation and teratoma formation.Cells of the neuroectodermal lineage,such as neuronal subpopulations and glia,have been explored with varying degrees of success.Although the risk of cancer or teratoma formation is greatly reduced,each subpopulation varies in effectiveness and is influenced by a myriad of factors,such as the timing of the transplant,pathology type,and the ratio of accompanying progenitor cells.Furthermore,successful transplantation requires innovative approaches to develop delivery vectors that can mitigate cell death and support integration.Lastly,host immune responses to allogeneic grafts must be thoroughly characterized and further developed to reduce the need for immunosuppression.Translation to a clinical setting will involve careful consideration when assessing both physiologic and functional outcomes.This review will highlight both successes and challenges faced when using human induced pluripotent stem cell-derived cell transplantation therapies to promote endogenous regeneration.