Insights & Discussion
Coffee consumption shows a protective effect against colorectal and colon cancers, particularly among US subjects and European men.
A systematic review and meta-analysis of 26 prospective studies was conducted to explore the relationship between coffee consumption and the risk of colorectal cancer. The studies included in the review were appraised for their quality using the Newcastle-Ottawa Quality Assessment Scale for Cohort studies, with only one study deemed to be of low quality. The analysis was stratified by ethnicity to determine if this variable could explain the heterogeneity of the studies.
In the discussion of the results, it was found that while coffee consumption didn't show a significant relationship with colorectal cancer overall, when stratified for ethnicity, a protective effect emerged in US subjects. This effect was especially pronounced when looking at colon cancer, with coffee showing a protective effect in men and women combined, and in men alone. When examined by ethnicity, there was a significant protective impact in European men and Asian women. However, there was no significant association found with rectal cancer. Decaffeinated coffee also exhibited a protective effect against colorectal cancer in both men and women combined.
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Adding Compound Kushen Injection (CKI), a traditional Chinese medicine, to chemotherapy treatment enhanced treatment response and reduced side effects in advanced colorectal cancer patients.
2024 Integrative Cancer Therapies Efficacy and Safety of Compound Kushen Injection for Advanced Colorectal Cancer: A Systematic Review and Meta-Analysis of Randomized Clinical Trials with Trial Sequential Analysis Wu J, Ma X, Wang X, Zhu G, Wang H, Zhang Y, et al.
Meta-Analysis Colorectal Cancer Ku Shen
This study systematically collected data from a myriad of sources including, but not limited to, PubMed, the Cochrane Library, and ClinicalTrials.gov up to April 20, 2024. An assessment tool, ROB2, was used to measure the quality of the included trials, while data analysis was done using Stata 16. Publication bias was evaluated with the funnel plot and Egger's test. To calculate the final required sample size in this meta-analysis and verify whether the results presented a stable conclusion, trial sequential analysis was used.
The data collected from these sixteen trials, consisting of 1378 patients showcased that when compared to chemotherapy alone, the combination of CKI and chemotherapy resulted in improved response rates and enhancement of the patient's performance status. Furthermore, this combination therapy was associated with fewer adverse reactions like leukopenia, thrombocytopenia, gastrointestinal reactions, and liver damage. Patients also exhibited high CD4 ratios and comparatively low CD8 T cell ratios. A subgroup analysis further demonstrated that the response rates improved significantly when CKI was combined with specific chemotherapy regimens. Overall, this data strongly suggests that the addition of CKI to chemotherapy provided statistically significant and clinically relevant improvements in treatment response rates, patient wellbeing, reduction in adverse reactions, and enhanced immune function.
Crocin, a compound derived from saffron, has shown considerable potential in hindering tumor growth and improving immune status, across various malignant tumors.
2023 PeerJ Advances on the anti-tumor mechanisms of the carotenoid Crocin Bao X, Hu J, Zhao Y, Jia R, Zhang H, Xia L
Review Article Anti-Tumour Breast Cancer Cervical Cancer
The methodology for the study involved an in-depth review of modern pharmacological studies that have analyzed the therapeutic effects of crocin, a natural compound that can be extracted from saffron. Various anti-tumor effects were assessed including the induction of tumor cell death (apoptosis), restrictions on tumor cell proliferation, and potential barriers to invasion and metastasis of these cells. The potential for enhancement of sensitivity to chemotherapy and improvement of immune status were also examined.
Following the review, the study revealed that crocin has significant anti-tumor properties. It showed that this natural compound can induce apoptosis in tumor cells, inhibit their expansion and progression, and even prevent their invasiveness and metastasis. Furthermore, crocin demonstrated the potential to enhance the body’s responsiveness to chemotherapy and help boost the immune system. These effects were observed across a range of different malignant tumors, including stomach, liver, cervical, breast, and colorectal cancers.
Heavy coffee consumption increases the risk of cardiovascular disease mortality in individuals with severe hypertension, while green tea consumption does not.
2023 Journal of the American Heart Association Coffee and Green Tea Consumption and Cardiovascular Disease Mortality Among People With and Without Hypertension Teramoto M, Yamagishi K, Muraki I, Tamakoshi A, Iso H
Cohort Study Coffee Green Tea High Blood Pressure
With the use of the Japan Collaborative Cohort Study, researchers assessed 18,609 participants, both male and female, aged between 40 to 79 years. These participants had varying blood pressure levels, categorized into optimal and normal BP, high-normal BP, and two stages of hypertension. They completed a questionnaire about their lifestyle, diet, and medical history, and underwent health examinations, which were followed up until 2009. The association of coffee and green tea consumption on cardiovascular disease mortality was then calculated using a Cox proportional hazard model.
It was found over an 18.9 year follow-up period that heavy coffee consumption was linked to increased risk of cardiovascular disease mortality among those suffering from the second to third grade of hypertension. In stark contrast, people with optimal and normal, high-normal blood pressure and first grade hypertension did not show such associations between coffee consumption and cardiovascular disease mortality. Interestingly, the risk of cardiovascular disease mortality was not found to be increased across any blood pressure categories in relation to green tea consumption.
Consumption of tea and coffee may possibly provide anti-inflammatory effects, contributing to reduced cardiovascular risk and mortality.
2023 Pharmacological Research Coffee or tea: Anti-inflammatory properties in the context of atherosclerotic cardiovascular disease prevention Surma S, Sahebkar A, Banach M
Review Article Anti-Inflammatory Cardiovascular Disease Coffee
The methodology of this narrative review examined the potential anti-inflammatory properties of consuming tea and coffee as a factor in reducing the risk of cardiovascular disease. This was done by analyzing a plethora of studies and meta-analyses that explored the impact of diet on inflammation, with a keen focus on the consumption of these beverages. The studies looked at a variety of risk factors for atherosclerotic cardiovascular disease, including inflammation biomarkers such as C-reactive protein, along with the impact of modern lipid-lowering treatments.
In discussing the results, it was noticed that inconsistent findings were produced from the analysed studies which made a conclusive determination challenging. However, a trend was observed where drinking tea and coffee seemed to raise adiponectin levels, reduce reactive oxygen species and lower low-density lipoprotein cholesterol levels. Despite these potential anti-inflammatory properties of tea and coffee being somewhat uncertain due to various confounding factors, their consumption is still recommended as part of a healthy diet.
Moderate consumption of carrots is associated with a lower incidence of colorectal cancer, implying a potential cancer prevention effect in a certain dose-range.
2022 Frontiers in Nutrition Association of Dietary Carrot/Carotene Intakes With Colorectal Cancer Incidence and Mortality in the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial Jiang Z, Chen H, Li M, Wang W, Fan C, Long F
Cohort Study Carotene Carrot Colorectal Cancer
The research analysed the dietary intake of carrots/carotene and their relationship to colorectal cancer incidence and mortality in a cohort from the Prostate, Lung, Colorectal, and Ovarian Cancer Screening. The study involved 101,680 participants who joined the cohort between November 1993 and July 2001. The hazard ratios were estimated through multivariable Cox regression analyses. Additionally, subgroup analyses and interaction tests were conducted to check for potential effect modifiers. A generalised additive model was used to examine the non-linear trend of the exposure to cancer-related outcomes.
In total, the study documented 1,100 colorectal cancer cases and 443 cancer-related deaths. It was discovered that dietary carrot intake was linked to a 21% lower risk of colorectal cancer incidence for those in the 4th quintile group compared to the lowest quintile group. Increase in carrot intakes, on a per standard deviation, did not reveal any statistically significant associations with the disease incidence. There were no significant associations found between dietary α-, and β-carotene intake and colorectal cancer incidence, nor were there any associations between carrot/carotene intakes and cancer mortality. They also observed no non-linear dose-response relationships between dietary carrot, α-, and β-carotene intake and colorectal cancer incidence and mortality. Notably, the study found that smoking status could potentially modify the association of dietary carrot intake with incidence of colorectal cancer, but not mortality.
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