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The predictive value of CD4, CD8, and C—reactive protein in the prognosis of schistosomal and non-schistosomal colorectal cancer

BMC Gastroenterology volume 23, Article number: 194 (2023) Cite this article

Abstract

Background

Although schistosomiasis has been basically eliminated, it has not been completely extinction in China and occasional outbreaks occur in Europe in recent years. The relationship between inflammation caused by Schistosoma japonicum and colorectal cancer (CRC) is still obscure, and the inflammation based prognostic systems of schistosomal colorectal (SCRC) has rarely been reported.

Aim

To explore the different roles of tumor infiltrating lymphocytes (TILs) and C-reactive protein (CRP) in SCRC and in Non-schistosomal CRC (NSCRC), providing a possible predictive system to evaluate outcomes and to improve the risk stratification for CRC patients, especially for CRC patients with schistosomiasis.

Methods

Three hundred fifty-one CRC tumors were evaluated for density of CD4 + , CD8 + T cells and CRP in intratumoral and stromal compartments by immunohistochemical using tissue microarray.

Results

There were no association between TILs and CRP and schistosomiasis. Multivariate analysis identified stromal CD4 (sCD4) (p = 0.038), intratumoral CD8 (iCD8) (p = 0.003), schistosomiasis (p = 0.045) as independent prognostic factors for overall survival (OS) in the whole cohort; and sCD4 (p = 0.006) and iCD8 (p = 0.020) were independent prognostic factors for OS in the NSCRC and SCRC set, respectively. Besides, we found that there were no differences of TILs and CRP, which were distributed in different areas of tumor tissue, between CRC patients with and without schistosomiasis.

Conclusion

The results remind us that different subtypes of TILs have distinguished biological behavior and prognosis value in the immune microenvironment of NSCRC and SCRC patients. Meanwhile, the findings require us to stratify patients with schistosomiasis and this might facilitate patient counseling and management.

Peer Review reports

Introduction

Schistosomiasis is a chronic parasitic disease caused by a trematode blood fluke of genus schistosoma [1]. Schistosomiasis is a widespread endemic disease found in 74 countries [1] and over 250 million people are infected worldwide [2]. Schistosomiasis is now becoming a cause for concern in Europe, especially in southern Europe, because of climate change as well as infected travelers who return from endemic areas [3]. Qingpu District of Shanghai was once an endemic area of schistosomiasis, and the local people were deeply affected by it. There are still a large number of schistosomiasis-associated CRC patients left over from history. And schistosomiasis-associated CRC patients could be observed in our daily work occasionally.

It was suggested that schistosomiasis significantly correlated with increased colon cancer mortality in China [4]. Ming-Chai et al.`s study [5] revealed a similarity between chronic schistosomiasis and ulcerative colitis regarding predisposition to carcinoma in that pseudopolyposis, ectopic regenerating glands, epithelial proliferation and ulceration are common in both of them. They suggested a strong relation between Schistosoma japonicum and CRC. A similar conclusion was drawn by Yu et al. [6] from their studies on different types of schistosomal egg polyps. All these studies suggested that shistosomiasis is a risk factor for CRC. And our previous study suggested that schistosomiasis is an independent unbeneficial predictive factor for CRC [7]. However, some suggested that if there is an increase in the risk of CRC, it is small [6, 8]. Thus, the impacts of inflammation caused by schistosomiasis on CRC were necessary to be unraveled. However, related work has rarely been reported previously.

It was known that tumor-infiltrating lymphocytes (TILs) reflect an active inflammatory tumor microenvironment. And immunotherapeutic strategies harnessing the different components of the immune system to eliminate viable tumor cells are a promising therapeutic strategy. Several studies have been made to assess the prognostic significance of TILs in human cancers, and pronounced lymphocytic infiltration has been shown to be a prognostic parameter for better survival in CRC [9,10,11]. However, inflammation based prognostic systems for schistosomal CRC has never been reported in the literature. TILs are composed of various lymphocytes with diverse functions. CD4 + , CD8 + are the most common lymphocytes. Of them, CD8+ T cells play a crucial role in protective immunity against many infectious pathogens and can eradicate malignant cells by releasing perforins and granzymes, which may contribute to tumor cell death [12]. CD4 + T cells secreted immunoregulatory cytokines such as IFN-γand TNF that may induce cytolytic T cell responses in tumors. C-reactive protein (CRP), an acute phase reactant, primarily stimulates the innate immune system by facilitating phagocytosis, but also modulates adaptive immunity [13, 14]. Serum CRP has been shown to have prognostic value in CRC [15, 16]. However, the prognostic value of intratumor CRP remains unknown, especially in CRC patients with schistosomiasis.

With these considerations, we evaluated CD4 + , CD8 + and CRP in CRC by immunohistochemical and compared their different prognostic roles between CRC patients with and without schistosomiasis. These results may uncover the important role of CD4 + , CD8 + and CRP in schistosomal CRC and provide a possible predictive system to evaluate outcomes for patients with schistosomiasis.

Materials and methods

Patients and sample selection

In this retrospective study, 351 unselected CRC patients who received curative resection without preoperative chemotherapy at Qingpu Branch of Zhongshan Hospital affiliated to Fudan University, from January 2008 to August 2016 were included. Clinicopathological information of patients in this survey was collected from clinical records and pathology reports. The local Ethics Committee of Qingpu Branch of Zhongshan Hospital approved the protocol of this study, which was conducted in accordance with the Declaration of Helsinki. Written informed consent was obtained from all patients. The inclusion and exclusion criteria were as previously described [7].

Tissue microarray construction

Tissue microarrays (TMA) were constructed as previously described [17]. Hematoxylin and eosin (H&E)-stained slides from tissue blocks had been reviewed for adequacy of the representative areas of interest with a high density of tumor cells. The corresponding regions were marked on archival formalin-fixed, paraffin-embedded (FFPE) tissue blocks. The representative areas (2 mm wide and 6 mm long) of the tumor were extracted and then vertically planted into the recipient block one by one according to the corresponding location. The planting surface was aggregated on the aggregation instrument. An array was constructed with a maximum of 40 cores.

Immunohistochemical analysis

Three- to 5-μm thick CRC tissues were consecutively cut, subsequently dewaxed and rehydrated through graded alcohols. Slides were immunohistochemically stained in Roche Ventana Benchmark XT automated slide stainer (Ventana Medical Systems, Roche, France) according to the manufacturer`s instructions. Monoclonal and polyclonal anti-human antibodies were used for identification of CD4 + T cells (anti-CD4, 4B12, Dako), CD8 + T cells (anti-CD8, Ab4055, Abcam), CRP (Abcam, Cambridge, Massachusetts, Ab 32,412, rabbit monoclonal Y284).

Pathological assessment of CD4 and CD8 + T cell density and C-reactive protein

The TMA slides were scanned using a scanner system (PRECICE 500B) at 40 × magnification. For CD4 and CD8, the densities of positively stained cells were evaluated on whole section slides using an image analysis system (Image J software, USA) (cells per square millimeter) (Fig. 1A, B). At least half of the core area was selected randomly, and the results of the calculated densities were extracted and put into an Excel file. Measurements were recorded as the mean number of positive cells per tissue unit in square millimetres as well as the number of positive cells among each 1-mm2 tissue units.

Fig. 1
figure 1

Immunohistochemical (IHC) staining of representative CD4 expression and CD8 expression positivity in different tumor areas. A CD4 expression positivity (× 100) in the intratumoral area (iCD4) (inside the circle) and stromal area (sCD4) (outside the circle). B CD8 expression positivity (× 200) in the intratumoral area (iCD8) (inside the circle) and stromal area (sCD8) (outside the circle)

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The C-reactive protein (CRP) staining were located in the stromal cells` and tumoral cells` cytoplasm in a diffused manner (Fig. 2A-C).

Fig. 2
figure 2

Immunohistochemical (IHC) staining pattern for C-reactive protein (CRP). A A negative immunohistochemical staining pattern (× 100); B Positive IHC staining pattern for tumoral CRP (× 200). C Positive IHC staining pattern for stromal CRP (× 100)

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Detection of schistosome ova and assessment of tumor budding

Schistosome ova were observed in all of original HE stained formalin-fixed paraffin-embedded (FFPE) sections (usually 4–6 slides), which were examined at 10 × and 40 × magnification fields using a conventional light microscope by two pathologists who were blinded to the clinical data. The diagnosis of schistosomiasis was done by finding schistosome eggs in HE-stained slides (Sup. Fig. 1).

Tumor budding was defined as the presence of dedifferentiated single cells or small clusters of up to 5 cells at the invasive front of CRC [18]. The assessment of tumor budding was conducted as previously described [7]. Briefly, the 10-HPF method was used [19], the invasive front is first scanned at low magnification (4 × to 10 ×) to identify areas of highest budding density. Tumor buds are then counted under high magnification (40 ×), and the tumor budding count is reported. The evaluation of tumor budding was conducted by two pathologists who were blinded to the clinical data. Five tumor budding counts were used as breakthrough point. In brief, tumor bud counts greater than or equal to 5 were defined as the high group, otherwise as the low group.

Statistical analysis

The associations between CD4 and CD8 and clinicopathologic features were analyzed using the chi-square (χ2) test. Time-to-event outcomes were defined from date of initially curative resection to date of last follow-up. Univariate analysis was based on the Cox proportional hazards regression model. A multivariate Cox forward stepwise regression model was used to detect independent predictors of survival. The survival curves were compared using Kaplan–Meier method and log-rank test. All tests were two sided, and a P-value of less than 0.05 was considered as statistical significance. Data were analyzed using SPSS version 22.0 software (SPSS Inc., Chicago, IL, USA).

Results

Study population

The median follow-up time was 62.4 (1.25–134.4) months. During the follow up, there was 41.6% (146 out of 351) patients died. Mean and median time to OS was 62.54 and 62.85, respectively. The clinicopathologic features of a total of 351 cases of CRC were summarized in Table 1. Briefly, the age of patients with schistosomiasis was dominantly older than that of patients without schistosomiasis (p < 0.001). Unexpectedly, there was no significant difference in morphology between CRC associated with schistosomiasis and that of without schistosomiasis (Table 1). In the whole cohort, the median age was 69 years (range 33–91), with frequencies between women 39% (137 out of 351) and men 61% (214 out of 351). The location of the tumor in 27% of patients was rectum, in left colon was 33% and in right colon was 40%. On the basis of the AJCC Staging Manual (seventh edition), 76% cases were histologically graded as well to moderately differentiated, and 24% were poorly differentiated. The most predominant histological type was adenocarcinoma (311 out of 351), mucinous and signet ring cell carcinoma were 11% (40 out of 351). Vessel and nerve involvement were identified in 122 (35%) and 31 (1%) tumors, respectively. Lymph node metastasis was identified in 144 (41%) patients. Stage I-II cases were accounted for 54% (190 out of 351), while stage III-IV cases were 46% (161 out of 351), respectively. Schistosoma eggs could be observed under microscope in almost 39% cases.

Table 1 Clinicopathological characteristics of the CRC cohort
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Immunohistochemical findings

CD4 + and CD8 + cells were observed both in cancer stroma and within cancer epithelium (i.e., intraepithelial). Representative pictures of lymphocyte infiltration are shown in Fig. 1A, B. The distributions of CD4 + and CD8 + cell density in different areas are shown in Table 2 and Fig. 3. The optimum cutoff values of CD4 + T and CD8 + T cell density were determined by X-tile program, which were 29 cell/mm2 for intraepithelial CD4 (iCD4) (Table 2 and Sup Fig. 2A-C) and 145 cell/mm2 for stroma CD4 (sCD4) (Table 2 and Sup Fig. 3A-C) and 77 cell/mm2 for intraepithelial CD8 (iCD8) (Table 2 and Sup Fig. 4A-C) and 645 cell/mm2 for stroma CD8 (sCD8) (Table 2 and Sup Fig. 5A-C). Patients were divided into 2 groups for further analysis based on their respective cutoff values. The C-reactive protein (CRP) positive staining were located in the stromal cells` and tumoral cells` cytoplasm in a diffused manner (Fig. 2A-C). The CRP positive staining was defined as positive, whereas negative staining was defined as negative.

Table 2 Densities and cut-off values of the tumour infiltrating lymphocytes
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Fig. 3
figure 3

Heterogeneity of tumor-infiltrating immune cells. The density of iCD4 + , sCD4 + , iCD8 + , sCD8 + cells differed significantly according to tumor location (results were examined by using the unpaired t-test); Abbreviations: iCD4 = intratumoral CD4; sCD4 = stromal CD4; iCD8 = intratumoral CD8; sCD8 = stromal CD8

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Association of TILs density and CRP with clinicopathological features

The relationship between TILs density and patient demographics is listed in Table 3. No significant correlations were observed between iCD4 + T cell density and clinical characteristics, such as age, gender, TNM stage, tumor differentiation and so on (p > 0.05). There was also no correlation between sCD4 + T cell density and other clinical characteristics except for tumor budding (p = 0.031), lymph node metastasis (p = 0.045) and TNM stage (p = 0.001). Furthermore, there were significant association between iCD8 + T cell density and age (p < 0.001), tumor deposit (p = 0.032). In addition, there were significant association between sCD8 + T cell density and tumor deposit (p = 0.004). However, there were no significant association between TILs and shistosomiasis (p > 0.05).

Table 3 The association between clinicopathological characteristics and sTILs
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The association between sCRP and tCRP and clinical characteristic were listed in Supplementary Table 1. Results demonstrated that sCRP was inversely associated with tumor size (p = 0.020) and colonic perforation (p = 0.001). Besides, tCRP was also negatively associated with colonic perforation (p = 0.001). Unexpectedly, there were no relationship between tCRP or sCRP and schistosomiasis as well as CD4 + T cells and CD8 + T cells.

Univariate and multivariate regression analysis

In the whole cohort, univariate Cox regression analysis identified clinical factors significantly associated with OS (Table 4) were iCD4 (p = 0.015), sCD4 (p = 0.002), iCD8 (p < 0.001), age (p = 0.010), gender (p = 0.008), pathological T stage (p < 0.001), lymph node metastasis (p < 0.001), TNM stage (p < 0.001), tumor differentiation (p < 0.001), lymphovascular invasion (p < 0.001), tumor deposit (p < 0.001), tumor budding (p < 0.001) and schistosomiasis (p = 0.044), whereas only gender (p = 0.009), pathology T stage (p = 0.035), TNM stage (p < 0.001), sCD4 (p = 0.038), iCD8 (p = 0.003), schistosomiasis (p = 0.045) and tumor deposit (p < 0.001) were identified as independent risk factors for OS in multivariate regression analysis (Table 4).

Table 4 Univariate and multivariate Cox regression of clinicopathological for overall survival
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In the NSCRC set, univariate Cox regression analysis identified clinical factors significantly associated with OS (Table 4) were sCD4 (p < 0.001), iCD8 (p = 0.002), gender (p = 0.017), pathological T stage (p = 0.001), lymph node metastasis (p < 0.001), TNM stage (p < 0.001), tumor differentiation (p = 0.003), lymphovascular invasion (p < 0.001), tumor deposit (p < 0.001) and tumor budding (p < 0.001). Variables demonstrating a significant effect on OS were included in the multivariate analysis. Gender (p = 0.023), pathology T stage (p = 0.046), sCD4 (p = 0.006), tumor budding (p = 0.034), and tumor deposit (p < 0.0001) were identified as independent prognostic factors that associated with OS in the set in multivariate regression analysis (Table 4).

In SCRC set, univariate Cox regression analysis identified clinical factors statistically significantly associated with OS (Table 4) were iCD8 (p = 0.001), sCD8 (p = 0.040), lymph node metastasis (p < 0.001), TNM stage (p < 0.001) and tumor deposit (p < 0.001), whereas only lymph node metastasis (p < 0.001), iCD8 (p = 0.020) and tumor deposit (p < 0.001) were identified as independent prognostic factors that associated with OS in this set in multivariate regression analysis (Table 4). Unexpectedly, there were no association between stromal CRP and tumoral CRP and OS in the whole cohort and subgroups.

Kaplan–Meier analysis of OS

Kaplan–Meier analysis, which was based on the cutoff value of the density of CD4 + T cells and CD8 + T cells in different tumor areas, was conducted to assess the variables in OS among different groups. In the whole cohort, compared to the low-density group, patients in the sCD4 and iCD8 high-density group experienced significantly higher OS (p = 0.0020, p < 0.001; Fig. 4A and B). In the NSCRC set, patients in the sCD4 high-density group gained beneficial OS compared to patients in the low-density group (p = 0.0004, Fig. 4C). Furthermore, patients in the iCD8 high-density group also possessed favorable survival compared to that of in the low-density group (p = 0.0008, Fig. 4D). There was no association between sCRP or tCRP and OS in any subgroups (data was not shown).

Fig. 4
figure 4

Kaplan–Meier (K-M) curves for overall survival (OS) of colorectal cancer (CRC) patients with low or high TILs density. A.OS analysis of stromal CD4 + T cell density in the whole cohort; B. OS analysis of intratumoral CD8 + T cell density in the whole cohort; C. OS analysis of stromal CD4 + T cell density in schistosomal CRC (NSCRC) patients; D. OS analysis of intratumoral CD8 + T cell density in non-schistosomal CRC (SCRC) patients

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Comparison of TILs density and positive stained CRP in CRC patients with and without schistosomiasis

We next compared the density distribution of CD4 + and CD8 + T cells in CRC patients with and without schistosomiasis (data was not shown). The distribution of CD4 + T cells in stromal or tumoral area between NSCRC and SCRC groups had no significant differences. Similarly, the distribution of CD8 + T cells in stromal or tumoral area also had no significant differences between the NSCRC and SCRC group. The expression positivity rate of stromal CRP was 22% and 30% in the NSCRC group and SCRC group, respectively. Besides, the expression positivity rate of tumoral CRP was 14% and 15% in the NSCRC group and SCRC group, respectively.

Discussion

Schistosomiasis leads to inflammatory changes in CRC patients is well studied. However, direct evidences supporting inflammatory changes caused by inflammatory response after schistosomiasis infection are still lacking. Moreover, inflammation based prognostic systems for CRC were pronounced, but related predictors for schistosomal CRC have never been reported previously. In the present study, we found that CD4 + and CD8 + T cells distributed in different tumor areas were correlated with less aggressive tumor characteristics, but CRP distributed in different tumor areas were associated with more aggressive tumor features. In addition, results suggested that iCD4, sCD8, schistosomiasis, gender, pathological T stage, TNM stage and tumor deposit were independent prognostic factors for OS in the whole cohort; In the NSCRC set, sCD4, tumor budding, gender, pathological T stage and tumor deposit were independent prognostic factors for OS; In the SCRC set, iCD8, lymph node metastasis and tumor deposit were independent prognostic factors for OS. Furthermore, we found that there were no differences of TILs densities and CRP expression positivity, which were distributed in different areas of tumor tissue, between CRC patients with and without schistosomiasis.

Our results demonstrated that iCD4 and sCD8 were associated with favorable OS for CRC patients. However, when patients were divided into NSCRC and SCRC set based on status of schistosomal infection, sCD4 and iCD8 were independent prognostic factor for NSCRC patients and for SCRC patients, respectively. These results remind us that TILs distributed in different tumor areas have distinguished biological behavior and function, and the immune microenviroment is different in NSCRC and SCRC patients. Meanwhile, the findings require us to stratify patients with schistosomiasis and might facilitate patient counseling and management. The findings also pave the way for customized chemotherapy in CRC patients with schistosomiasis and without schistosomiasis individually based on the infiltration of TILs, because CRC patients with high levels of TILs could have improved outcome with 5-fluorouracil-based chemotherapy.

CD8 + T cells are cytotoxic T lymphocytes that directly attack cancer cells and play a central role in anti-cancer immunity [20]. Previous studies revealed substantial evidence that the density of CD8 + TILs was associated with the favorable survival in patients with various types of cancer [20,21,22]. Consistent with previous reports, this study confirmed the usefulness of CD8 + T-cell densities as prognostic factors (Table 4 and Fig. 4). CD4 + T cell density has been reported to be a unbeneficial prognostic factor in other types of cancers, e.g. lung, renal, prostate and breast cancer [23,24,25,26]. On the contrary, Taichi Kuwahara et al.`s study showed that CD4 + T cell densities were associated with favorable clinical outcomes [27]. This is consistent with our results. The reason for this discrepancy remains unclear, but it may be because the function of CD4 + T cells within the tumor microenvironment—i.e. in immune response activation or immunosuppression—may differ depending on the cancer type. Besides, we found that CRP was not associated with clinical outcome. This may be because CRP is a good predictor for clinical outcomes in the acute phase [15, 28, 29], or may be serum CRP is more suitable as a prognostic predictor. It was well known that schistosoma egg deposited in the intestine provoke immune response and lead to chronic inflammation, and then lead to shisotomiasis. It was speculated that the densities of TILs in NSCRC and SCRC patients were different. However, our results showed that the densities of TILs and CRP expression levels in the two sets were similar. It may be because patients at diagnosis were not in the acute stage, but in the chronic stage. In addition, this may be explained that patients with schistosomiasis are obviously older than patients without schistosomiasis (Table 1), and the immune response of the elderly is weaker than that of the young.

Our retrospective study had several limitations. First, we do recognized the limitation of utilizing a TMA approach to assess expression of a biomarker that may only be locally present in samples, raising the possibility of false negatives, which could possibly change the significance of TILs in CRC. Second, because all results were generated at a single institution, the uniformity of the results may be low. Further work will be needed to validate the present results in a larger cohort of multicenters. Besides, validation studies may be performed on whole tissue slides to optimize the selection of regions which is most suitable for TILs assessment. Thirdly, the diagnosis of schistosomiasis was done by finding schistosome eggs in HE-stained slides. This will lead to positive cases miss and to generate data bias. We tried to use other methods to detect schistosomiasis related indicators, such as imaging data and serological tests. However, imaging data was not completed and serum could not be collected as the specimen used in this study was years ago. At present, more comprehensive materials related to schistosomiasis were collecting and will be used to validate results from this study.

Conclusion

In present study, iCD4 + and sCD4 + T cell densities were independent beneficial prognostic factors for NSCRC patients and SCRC patients, respectively. We believe that this study is the first to report the prognostic significance of TILs and CRP in schistosomiasis-associated CRC patients. Hence, the results in this study remind us that different subtypes of TILs, which distributed in different tumor areas, have distinguished biological behavior and prognosis value in the immune microenviroment of NSCRC and SCRC patients. Meanwhile, the findings require us to stratify patients with schistosomiasis and might facilitate patient counseling and management.

Availability of data and materials

The datasets used and/or analyzed during the current study are available from the corresponding authors on reasonable request.

Abbreviations

CRC:

Colorectal cancer

SCRC:

Schistosomal colorectal cancer

NSCRC:

Non-Schistosomal colorectal cancer

TILs:

Tumor infiltrating lymphocytes

CRP:

C-reactive protein

TMA:

Tissue microarray

iCD4:

Intratumoral CD4

sCD4:

Stromal CD4

iCD8:

Intratumoral CD8

sCD8:

Stromal CD8

OS:

Overall survival

H&E:

Hematoxylin and eosin

FFPE:

Formalin fixed paraffin-embedded

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Acknowledgements

None

Funding

This work is supported by China Shanghai Municipal Commission of Health and Family Planning (Grant No. w2021-25 and QWJ2022-04 and QKY-2022–12).

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Authors and Affiliations

  1. Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University, No. 1158 East Park Road, Qingpu District, Shanghai, 200032, P.R. China

    Meihong Cheng, Hongyan Jing, Dacheng Bu, Jing Liu, Kui Lu, Jican Liu, Yanchao Xu, Ting Zhu, Junxia Yao, Qilin Zhai & Weixia Wang

  2. Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai, 201700, P.R. China

    Yingyong Hou

Authors
  1. Meihong Cheng
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  2. Hongyan Jing
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  3. Dacheng Bu
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  4. Jing Liu
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  5. Kui Lu
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  6. Jican Liu
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  7. Yanchao Xu
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  8. Ting Zhu
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  9. Yingyong Hou
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  10. Junxia Yao
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  11. Qilin Zhai
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  12. Weixia Wang
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Contributions

Wang WW and Zhai QL: project development, data analysis, manuscript writing/editing; Cheng MM and Yao JX: assessed all the dyeing slices; Jing HY, Bu DC, Liu J, Lu K, Liu JC, Xu YC, Zhu T, Hou YY and Yao JX: data analysis & collection, manuscript editing. The author(s) read and approved the final manuscript.

Corresponding authors

Correspondence to Qilin Zhai or Weixia Wang.

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Ethics approval and consent to participate

This study was approved by the medical ethics committee of Fudan University, in accordance with the Helsinki Declaration of 1975. Prior written informed consent was obtained from all patients.

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Written informed consent was obtained from each participant.

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The authors declare that they have no competing interests.

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Supplementary Information

Additional file 1: Supplementary Table 1.

The association between clinicopathological characteristics and tumoral and stromal C-reactive protein. Sup Fig. 1. Typical sample of schistosomiasis-associated colorectal cancer, the red arrows indicate schistosome ova. Sup Fig. 2. Determination of cut-off values of intratumoral CD4 density of TMAs and survival analyses. Sup Fig. 3. Determination of cut-off values of stromal CD4 density of TMAs and survival analyses. Sup Fig. 4. Determination of cut-off values of intratumoral CD8 density of TMAs and survival analyses. Sup Fig. 5. Determination of cut-off values of stromal CD8 density of TMAs and survival analyses.

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Cheng, M., Jing, H., Bu, D. et al. The predictive value of CD4, CD8, and C—reactive protein in the prognosis of schistosomal and non-schistosomal colorectal cancer. BMC Gastroenterol 23, 194 (2023). https://0-doi-org.brum.beds.ac.uk/10.1186/s12876-023-02834-z

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Keywords

BMC Gastroenterology

ISSN: 1471-230X

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