Cancer survivorship: current status of research, care, and policy in Japan

Cancer survivorship care: challenges and opportunities in Japan

This article discusses the current international scope and practices of cancer survivorship care and the challenges and opportunities of survivorship care in Japan. Cancer is a common illness in Japan; however, the national cancer control plan focuses only on limited survivorship-related issues, and there is no official national-level survivorship care strategy that addresses the diverse unmet needs of survivors. There is an urgent need to discuss and implement measures for quality survivorship care delivery under the current healthcare system in Japan. The Development of Survivorship Care Coordination Model Research Group, 2022, organized under the National Cancer Center Japan research grant from 2019 to 2022, identified four tasks that are required to realize quality survivorship care: (i) providing education opportunities for survivorship care stakeholders to raise awareness about the concept and the necessity of cancer survivorship care, (ii) providing training opportunities and cancer survivorship care certification for community healthcare providers, (iii) enforcing the economic basis of survivorship care and (iv) creating simpler systems that are organically linked with existing care systems. Collaboration among multiple players is indispensable to developing the philosophy of survivorship care and efficient care delivery. For this purpose, we need a platform where diverse players can participate equally towards the same goal: cancer survivors' optimal wellness.

Cancer treatment-related financial toxicity in Japan: a scoping review

Financial toxicity during cancer survival has been studied mainly in the United States; 47-49% of cancer survivors reported financial hardships and 12-63% reported debt owing to treatment costs. Financial toxicity is influenced by each country's economic status and healthcare system. We aimed to review the evidence on financial toxicity in Japan. A systematic search was performed using PubMed and Ichushi databases. We included English or Japanese peer-reviewed articles that (1) explored the experiences of cancer patients facing financial toxicity due to cancer diagnosis and treatment, (2) were specific to Japan, and (3) focused on the experiences of financial toxicities among cancer patients. Data were extracted focusing on the experiences of patients, families, and healthcare providers. The main themes were synthesized based on a previous study. The search yielded 632 citations from PubMed and 21 from Ichushi, and non-duplicates were identified. Of these, 31 articles were selected for full-text review. Literature was divided into studies describing the following elements: (a) risk factors for financial toxicity, (b) description of financial toxicity, (c) psychological reactions, (d) coping strategies for financial toxicity, and (e) impact on treatment outcomes. Only three studies reported comprehensive financial toxicity scores. Furthermore, treatment costs influenced physicians' treatment decisions, and patients and their families adopted various strategies to cope with treatment costs. Two studies showed that low current income and younger age were high-risk factors. As for utilization of the support system, approximately 70% of the patients used the high-cost medical expense system, 20% used the sickness benefit system, and 40% used the medical expense deduction system. Many cancer patients in Japan suffer from financial toxicity during cancer survival. One reason for this is that the awareness of the system supporting financial toxicity is insufficient and actual utilization is low. It is necessary to actively encourage patients to ask healthcare providers questions, improve the link between patients and the support system, reconstruct the support system design, and improve the method of publicizing the system.

Trends in the Prevalence of Cancer in Cardiovascular Diseases: A Single Center Retrospective Study, 2011-2018

BACKGROUND

Recent progress of cancer therapy has increased the number of cancer survivors, in whom cardiovascular diseases (CVDs) have become a big concern. This study aimed to clarify the prevalence of various types of CVDs in cancer patients, using the database of the Cardiovascular Medicine in Kurume University Hospital.

METHODS AND RESULTS

This retrospective cohort study enrolled 11,093 hospitalized patients in Cardiovascular Medicine, Kurume University Hospital from April 2011 to March 2019. Among 11,093 enrolled patients, there were 992 CVDs patients with cancer (8.94%). The five most prevalent forms of cancer were colon cancer, prostate cancer, hepatocellular carcinoma, lung cancer, and gastric cancer. Although there was no statistical significance, the comorbidity of breast cancer gradually increased during the study period (2011-2018). In all CVDs, prostate cancer, lung cancer, and uterine cancer tended to increase as comorbidities, while hepatocellular carcinoma and tongue cancer tended to decrease during the observational period. The absolute number of patients with cancer increased in all CVDs, including coronary artery diseases, heart failure, arrhythmia, and pulmonary hypertension.

CONCLUSIONS

The present study demonstrates that the prevalence of cancer in hospitalized CVDs patients was around 10%, and is showing a tendency to increase. Thus, cancer may have substantial impacts on CVDs treatment.

Risk factor structure of heart failure in patients with cancer after treatment with anticancer agents' assessment by big data from a Japanese electronic health record

As the prognosis of cancer patients has been improved, comorbidity of heart failure (HF) in cancer survivors is a serious concern, especially in the aged population. This study aimed to examine the risk factors of HF development after treatment by anticancer agents, using a machine learning-based analysis of a massive dataset obtained from the electronic health record (EHR) in Japan. This retrospective, cohort study, using a dataset from 2008 to 2017 in the Diagnosis Procedure Combination (DPC) database in Japan, enrolled 140,327 patients. The structure of risk factors was determined using multivariable analysis and classification and regression tree (CART) algorithm for time-to-event data. The mean follow-up period was 1.55 years. The prevalence of HF after anticancer agent administration were 4.0%. HF was more prevalent in the older than the younger. As the presence of cardiovascular diseases and various risk factors predicted HF, CART analysis of the risk factors revealed that the risk factor structures complicatedly differed among different age groups. The highest risk combination was hypertension, diabetes mellitus, and atrial fibrillation in the group aged  ≤ 64 years, and the presence of ischemic heart disease was a key in both groups aged 65-74 years and 75 ≤ years. The machine learning-based approach was able to develop complicated HF risk structures in cancer patients after anticancer agents in different age population, of which knowledge would be essential for realizing precision medicine to improve the prognosis of cancer patients.

Effectiveness of a support program for balancing treatment and work in small and medium-sized enterprises promoted by occupational health nurses using a web meeting system: A cluster randomized controlled trial

OBJECTIVES

In this study, we conducted a cluster randomized control trial to verify the effectiveness of a treatment work balance support (TWBS) program promoted by occupational health nurses (OHNs) in small and medium-sized enterprises (SMEs) using a web meeting system.

METHODS

We analyzed data from 64 managers (32 each in the control and intervention groups) and 541 workers (246 and 295 in the control and intervention groups, respectively) from 22 SMEs (11 in each group) with less than 200 workers. The TWBS program comprised online consultations for managers and seminars for workers by an OHN. TWBS leaflets were distributed among both groups. The "Recognition and Attitude Scale toward TWBS" was administered and workplace climate, psychological safety (PS), and work engagement (WE) scores were measured at baseline and endpoint. The increase in scores of each group was analyzed using a linear mixed-effects model.

RESULTS

Increases in managers' scores on all three recognition and attitude subscales were significantly greater in the intervention than in the control group (P = .048, .003, and .032, respectively). Workers' score increases were significantly higher on two subscales-recognition of workplace initiatives and understanding of professionals' roles-in the intervention than in the control group (P = .043 and .001, respectively). There was no difference between the two groups in the amount of increase in PS and WE, as perceived by managers and workers.

CONCLUSIONS

The TWBS program by OHNs increased recognition and attitude among SME managers and workers, indicating the usability of promoting TWBS in SMEs.

Perceptions and practice patterns of cancer survivorship care among Japanese gynecologic oncologists: The JGOG questionnaire survey

OBJECTIVE

This study aimed to assess gynecologic oncologists (GOs)' perceptions and attitudes toward cancer survivorship to help improve survivor care.

METHODS

We conducted a web-based questionnaire survey about survivorship issues for the GOs belonging to the Japan Gynecologic Oncology Group. We analyzed the proactiveness of the participants toward addressing 25 survivor issues. In addition, the practice patterns and barriers to care for survivors' long-term health issues, such as second primary cancer (SPC) and lifestyle-related diseases (LSRD), and return-to-work (RTW) support were assessed.

RESULTS

We received 313 responses. The respondents had a mean of 22 years of physician experience. The ratio of men to women was approximately 7:3, and 84.7% worked at facilities for multidisciplinary cancer treatment. The respondents' proactiveness for addressing psychosocial problems was significantly lower than physical and gynecological issues (p<0.01 by χ² test). However, most GOs tried to contribute to such issues according to patients' demands. Women GOs were more proactively involved in some survivorship issues than the men (p<0.05 by logistic regression analysis). The rates of the respondents who proactively discussed SPC, LSRD, and RTW were unexpectedly high (60.7%, 36.1%, and 52.4%, respectively). However, the GOs only provided verbal support for these issues in many cases.

CONCLUSION

The Japanese GOs were enthusiastic about survivorship care. However, their tendency to deal with survivors' problems through their own knowledge and judgments raises concerns about the quality of care. Therefore, creating survivorship care guidelines and enhancing multidisciplinary collaboration should be prioritized.

Improved models of care for cancer survivors

The number of survivors of cancer is increasing substantially. Current models of care are unsustainable and fail to address the many unmet needs of survivors of cancer. Numerous trials have investigated alternate models of care, including models led by primary-care providers, care shared between oncology specialists and primary-care providers, and care led by oncology nurses. These alternate models appear to be at least as effective as specialist-led care and are applicable to many survivors of cancer. Choosing the most appropriate care model for each patient depends on patient-level factors (such as risk of longer-term effects, late effects, individual desire, and capacity to self-manage), local services, and health-care policy. Wider implementation of alternative models requires appropriate support for non-oncologist care providers and endorsement of these models by cancer teams with their patients. The COVID-19 pandemic has driven some changes in practice that are more patient-centred and should continue. Improved models should shift from a predominant focus on detection of cancer recurrence and seek to improve the quality of life, functional outcomes, experience, and survival of survivors of cancer, reduce the risk of recurrence and new cancers, improve the management of comorbidities, and reduce costs to patients and payers. This Series paper focuses primarily on high-income countries, where most data have been derived. However, future research should consider the applicability of these models in a wider range of health-care settings and for a wider range of cancers.

Defining research and infrastructure priorities for cancer survivorship in Australia: a modified Delphi study

PURPOSE

The aim of this study was to establish research and infrastructure priorities for cancer survivorship.

METHODS

A two-round modified online Delphi study was completed by Australian experts in cancer survivorship. Initial priorities were generated from the literature and organized into four research categories: physiological outcomes, psychosocial outcomes, population groups, and health services; and one research infrastructure category. In round 1 (R1), panelists ranked the importance of 77 items on a five-point scale (not at all important to very important). In round 2 (R2), panelists ranked their top 5 priorities within each category. Panelists also specified the type of research needed, such as biological, exploratory, intervention development, or implementation, for the items within each research category.

RESULTS

Response rates were 76% (63/82) and 82% (68/82) respectively. After R1, 12 items were added, and 16 items combined or reworded. In R2, the highest prioritized research topics and the preferred type of research in each category were: biological research in cancer progression and recurrence; implementation and dissemination research for fear of recurrence; exploratory research for rare cancer types; and implementation research for quality of care topics. Data availability was listed as the most important priority for research infrastructure.

CONCLUSIONS

This study has defined priorities that can be used to support coordinated action between researchers, funding bodies, and other key stakeholders. Designing future research which addresses these priorities will expand our ability to meet survivors' diverse needs and lead to improved outcomes.

Perspectives on follow-up care and research for childhood cancer survivors: results from an international SIOP meet-the-expert questionnaire in Kyoto, 2018

INTRODUCTION

Survival of childhood cancer has increased over the past decades. This has led to the development of strategies aiming to enhance follow-up care and research, for which priorities may vary globally. We explored perspectives of an international healthcare workers panel.

METHODS

Attendants of a meet-the-expert session on childhood cancer survivorship at the 2018 SIOP conference completed a survey about their view on important follow-up care and research aspects for survivors below and over 18 years. We analysed overarching categories and subtopics, and compared Asian versus European and North American healthcare workers.

RESULTS

A total of 58 participants from different medical specialties (67.2% paediatric oncologists) and continents (48.3% Asia, 39.7% Europe/North America) responded. Follow-up care priorities for survivors below and over 18 years included physical care (39.3% ≤18 years, 35.9% >18 years) and healthcare structure (29.4%, 26.0%). Physical care was also the most important research aspect for both age groups (52.5%, 50.7%). Psychological support was the most frequently reported subtopic. Asian clinicians (n = 22) primarily prioritized physical care aspects of follow-up care, whereas European/North American (n = 19) clinicians underscored the importance of healthcare structure.

CONCLUSION

Physical care is the most important aspect of survivorship care and research according to clinicians from several continents. Asian and European/North American respondents shared most priorities, however, healthcare structure was a more important category for European/North American clinicians. The most common subtopic was psychological support, underlining also the need to involve psychologists in follow-up.

Gap between desired and self-determined roles of general practitioners: a multicentre questionnaire study in Japan

BACKGROUND

Primary care physicians have diverse responsibilities. To collaborate with cancer specialists efficiently, they should prioritise roles desired by other collaborators rather than roles based on their own beliefs. No previous studies have reported the priority of roles such clinic-based general practitioners are expected to fulfil across the cancer care continuum. This study clarified the desired roles of clinic-based general practitioners to maximise person-centred cancer care.

METHODS

A web-based multicentre questionnaire in Japan was distributed to physicians in 2019. Physician roles within the cancer care continuum were divided into 12 categories, including prevention, diagnosis, surgery, follow-up with cancer survivors, chemotherapy, and palliative care. Responses were evaluated by the proportion of three high-priority items to determine the expected roles of clinic-based general practitioners according to responding physicians in similarly designated roles.

RESULTS

Seventy-eight departments (25% of those recruited) from 49 institutions returned questionnaires. Results revealed that some physicians had lower expectations for clinic-based general practitioners to diagnose cancer, and instead expected them to provide palliative care. However, some physicians expected clinic-based general practitioners to be involved in some treatment and survivorship care, though the clinic-based general practitioners did not report the same priority.

CONCLUSION

Clinic-based general practitioners prioritised involvement in prevention, diagnoses, and palliative care across the cancer continuum, although lower expectations were placed on them than they thought. Some additional expectations of their involvement in cancer treatment and survivorship care were unanticipated by them. These gaps represent issues that should be addressed.

Nutrition Status and Renal Function as Predictors in Acute Myocardial Infarction with and without Cancer: A Single Center Retrospective Study

Background: Clinical characteristics of nutrition status in acute myocardial infarction (AMI) patients with cancer remains unknown. Therefore, this study aimed to clarify the differences of clinical parameters, including nutrition status, between AMI patients with and without history of cancer. Methods and Results: This retrospective cohort study, using the database of AMI between 2014 and 2019 in Kurume University Hospital, enrolled 411 patients; AMI patients without cancer (n = 358, 87.1%) and with cancer (n = 53, 12.9%). AMI patients with cancer were significantly older with lower body weight, worse renal function, and worse nutrition status. Next, we divided the patients into 4 groups by cancer, age, and plaque area, detected by coronary image devices. The prediction model indicated that nutrition, lipid, and renal functions were significant predictors of AMI with cancer. The ordinal logistic regression model revealed that worse nutrition status, renal dysfunction, lower uric acid, and elevated blood pressure were significant predictors. Finally, we were able to calculate the probability of the presence of cancer, by combining each factor and scoring. Conclusions: Worse nutrition status and renal dysfunction were associated with AMI with cancer, in which nutrition status was a major different characteristic from those without cancer.

Molecular and Neural Mechanism of Dysphagia Due to Cancer

Cancer is one of the most common causes of death worldwide. Along with the advances in diagnostic technology achieved through industry–academia partnerships, the survival rate of cancer patients has improved dramatically through treatments that include surgery, radiation therapy, and pharmacotherapy. This has increased the population of cancer “survivors” and made cancer survivorship an important part of life for patients. The senses of taste and smell during swallowing and cachexia play important roles in dysphagia associated with nutritional disorders in cancer patients. Cancerous lesions in the brain can cause dysphagia. Taste and smell disorders that contribute to swallowing can worsen or develop because of pharmacotherapy or radiation therapy; metabolic or central nervous system damage due to cachexia, sarcopenia, or inflammation can also cause dysphagia. As the causes of eating disorders in cancer patients are complex and involve multiple factors, cancer patients require a multifaceted and long-term approach by the medical care team.

Cross-sectional study: long term follow-up care for pediatric cancer survivors in a developing country, Turkey: current status, challenges, and future perspectives

Aim

The main purpose of this study is to determine the current status of long-term follow-up (LTFU) for childhood cancer survivors and the challenges of LTFU for pediatric cancer survivors at pediatric oncology institutions in Turkey.

Material and methods

A questionnaire was e-mailed to the directors of 33 pediatric oncology centers (POCs) registered in the Turkish Pediatric Oncology Group (TPOG). Of these 33 active TPOG institutions, 21 participated in the study and returned their completed questionnaires.

Results

Only 1 of the 21 participating centers had a separate LTFU clinic. The remaining centers provided LTFU care for childhood cancer survivors at the pediatric oncology outpatient clinic. Of these centers, 17 (80.9%) reported difficulty in transition from the pediatric clinic to the adult clinic, 14 (66.6%) reported insufficient care providers, and 12 (57.1%) reported insufficient time and transportation problems. As neglected late effects, 16 (76.1%) centers reported psychosocial and getty job problems and 11 (52.3%) reported sexual and cognitive problems. None of the centers had their own LTFU guidelines for their daily LTFU practice

Conclusion

This study was the first to gain an overview of the needs of POCs and the gaps in survivorship services in Turkey. The results from this study will help to develop a national health care system and national guidelines for pediatric cancer survivors.

Support for balancing cancer treatment and work by occupational health nurses: support structures and implementation status

This study aimed to quantitatively grasp the structure of support for balancing cancer treatment and work among occupational health nurses (OHNs) with the current implementation status. The anonymous questionnaire was designed based on the findings of our previous qualitative study and distributed to OHNs. The degrees of support implementation for workers with cancer, superiors and colleagues, and human resource managers were assessed for each item. Factor analysis of support items was conducted, and Wilcoxon signed-rank test was carried out to compare the support scores between the factors. Support for workers with cancer comprised six factors in which the factor, concerning the provision of information regarding resources inside and outside the company, showed the lowest score. Support for superiors and colleagues was divided into three factors, and that for human resource managers comprised two factors. By Mann-Whitney's U-test, it was found that OHNs, who worked without full-time occupational health physicians for smaller companies, showed significantly higher implementation for several support factors, such as support to human resource managers. This study revealed the structure as well as implementation status of OHNs' support for balancing cancer treatment and work, which will provide suggestions for developing training programs for OHNs to promote these activities.

Developing the structure of Japan's cancer survivorship guidelines using an expert panel and modified Delphi method

PURPOSE

To develop consensus-based components used in the first evidence-based cancer survivorship guidelines in Japan.

METHODS

Purposive sampling was used to recruit a panel of experts in oncology clinical practice, nursing, health science, epidemiology, and patient advocacy. The panel engaged in a modified Delphi process to (1) generate consensus related to the definition of survivorship, (2) determine the aim and target users of the guideline, and (3) identify clinical issues for inclusion. A Web-based survey and panel meeting were conducted to obtain the panelists' feedback on the initial draft proposed by the secretariat. Multiple online votes were then completed until all elements of the proposed guidelines reached an approval rate of 80% or higher. Following each round, iterative refinements were made based on all panelists' feedback.

RESULTS

Twenty-two experts were enrolled in the panel and participated in four rounds of online voting and two face-to-face meetings. Ultimately, the panel reached consensus on the definition of survivorship, the aim of the guidelines, and target users. Moreover, 11 of the original 17 clinical issues were retained. Finally, the panel selected two priority areas to implement immediately.

CONCLUSION

The panel's consensus on the definition of survivorship, aim and target users of the guideline, and 11 clinical issues will serve as a compass for the development of comprehensive cancer survivorship guidelines in Japan.

IMPLICATIONS FOR CANCER SURVIVORS

A culturally sensitive consensus approach was developed to improve the long term health and well- being of cancer survivors in Japan.

Lay people's psychological reactions and helping intention after friends' cancer disclosure: An exploratory analysis using vignettes

OBJECTIVES

Stigma, anticipated responses from others, and their relationships may affect patients' decision-making of cancer disclosure. However, little research has explored responses to cancer disclosure and the outcome from receivers' perspectives who had stereotypic views of cancer. This vignette study aimed to explore how lay people with negative attitude to cancer would react to the friend's cancer disclosure.

METHODS

A cross-sectional survey study was conducted in community organisations. Of 161 recruited, 91 participants returned their questionnaires (56.5% of response rate). A total of 88 responses to open-ended questions were qualitatively analysed.

RESULTS

Thematic analysis extracted four themes: 'Initial emotional reactions and the acceptance of the friend's cancer diagnosis'; 'Empathy, trust and helping intention'; 'Sharing informational and emotional support provision'; and 'Offering help, but waiting and seeing the friend's request.' As a result of comparison to these themes by the participants' familiarity of cancer patients in their real life, it was found that participants, who had not known any cancer patients, did not report the acceptance of the friends' cancer diagnosis and informational support provision to share.

CONCLUSION

Intervention for lay people who felt difficulty with accepting friends' cancer diagnosis may be helpful to reduce the impact of friends' cancer diagnosis.

Development and evaluation of a training program for occupational health nurses regarding support for workers with cancer and their workplaces

Objectives

This study aimed to develop and evaluate a training program for occupational health nurses (OHNs) regarding support for workers with cancer and their workplaces.

Methods

Based on our prior research, we engaged in multiple discussions on the development of training program for OHNs. For examining the effectiveness of the developed training program, we collected and analyzed the data from three repeated surveys conducted before, immediately after, and 3 months after the training on self‐confidence levels of the participants regarding 23 items associated with support for workers with cancer and their workplaces.

Results

We made a 3‐hour training program including a lecture and a group work. First, we gave a lecture explaining the support scheme consisting of 4 parts and the 12 hints in action phrase while using the guidebook. Second, we conducted the group work regarding the case of a female worker diagnosed with breast cancer. Of the participants who supported workers with cancer in actuality during the 3‐month post‐training, 86% acknowledged the utility of the training in implementing support. As for the pre‐post evaluation of the training program, most items of the participants’ self‐confidence significantly increased from pretraining to immediately after and 3 months post‐training.

Discussion

This study demonstrated that the developed training program was effective in that the participants learned the support schemes and skills and gained self‐confidence in implementing supports in real‐work settings. We hope that this training program will be extensively used in the future, enabling OHNs to contribute toward balancing cancer treatment and work.

Cancer rehabilitation as an essential component of quality care and survivorship from an international perspective

Background: There has recently been an emphasis on improving cancer care globally, including access to lifesaving treatment and earlier identification of disease. This will lead to more survivors stricken by impairments related to the early and late effects of cancer treatment. An unintended consequence of the noble plan to improve oncology care worldwide is demand on health care systems that may be unable to accommodate increased patient care needs for myriad reasons. As a result, those with disabilities may suffer.Methods: Literature search and input from experts in the field were used to evaluate the growing need for cancer rehabilitation and survivorship care to reduce morbidity associated with cancer treatment.Results: Many governmental and non-governmental organizations have started initiatives to improve cancer care across the continuum, and reduce the symptom burden of those living with cancer. While the start is promising, many barriers must be overcome to ensure high-quality care that would reduce cost and improve patient access, including a lack of trained rehabilitation specialists, poor coordination of efforts, and funding restrictions. Furthermore, global efforts to improve rehabilitation care often do not emphasize cancer rehabilitation, potentially leaving a gap and increasing physical and economic costs of disability. Finally, low-resource countries face unique challenges in improving cancer rehabilitation care.Conclusion: Cancer rehabilitation and survivorship care are needed to improve health care quality, as there is an expected influx of cancer patients with new global efforts to improve oncology care. To accomplish this, rehabilitation initiatives must emphasize cancer rehabilitation as a component of any program, and oncology endeavors should include a plan for the rehabilitation of cancer survivors to reduce morbidity and health care cost.Implications for RehabilitationCancer rehabilitation has the potential to reduce morbidity and health care costs associated with cancer and disability worldwideAdvocacy from international organizations regarding cancer rehabilitation is increasing, but has been disjointed and incompleteLow-resource countries in particular face several barriers to providing cancer rehabilitation and survivorship care.

LC-MS based cell metabolic profiling of tumor cells: a new predictive method for research on the mechanism of action of anticancer candidates

In the process of anticancer drug development, research on the mechanism of action remains a major obstacle. In the present study, a cell metabolic profiling based discriminatory model was designed to give general direction on anticancer candidate mechanisms. Firstly, ultra-performance liquid chromatography in tandem with high-definition mass spectrometry was applied to obtain a comprehensive metabolic view of 12 human tumor cells. Secondly, multivariate data analysis was used to assess the metabolites' variations, and 42 metabolites were identified as the main contributors to the discrimination of different groups. Then a metabolite-based prediction model was constructed for the first time and verified by cross validation (R 2 = 0.909 and Q 2 = 0.869) and a permutation test (R 2 = 0.0871 and Q 2 = -0.4360). To validate if the model can be applied for mechanism prediction, 4 independent sample sets were used to train the model and the data dots of different drugs were located in different regions. Finally, the model was applied to predict the anticancer mechanism of two natural compounds and the results were consistent with several other studies. Overall, this is the first experimental evidence which reveals that a metabolic profiling based prediction model has good performance in anticancer mechanism research, and thus it may be a new method for rapid mechanism screening.