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mRNA vaccine development for cholangiocarcinoma: a precise pipeline
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Tian-Yu Tang1, 2, 3, 4, 5, †, Xing Huang1, 2, 3, 4, 5, †, *, Gang Zhang1, 2, 3, 4, 5, Ming-Hao Lu1, 2, 3, 4, 5, Ting-Bo Liang1, 2, 3, 4, 5, *
Military Medical Research | 2023, 10(2) : 262 - 267
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Military Medical Research | 2023, 10(2): 262-267
• PERSPECTIVE •
mRNA vaccine development for cholangiocarcinoma: a precise pipeline
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Tian-Yu Tang1, 2, 3, 4, 5, †, Xing Huang1, 2, 3, 4, 5, †, *, Gang Zhang1, 2, 3, 4, 5, Ming-Hao Lu1, 2, 3, 4, 5, Ting-Bo Liang1, 2, 3, 4, 5, *
Affiliations
  • 1Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
  • 2Zhejiang Provincial Key Laboratory of Pancreatic Disease, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
  • 3Zhejiang Clinical Research Center of Hepatobiliary and Pancreatic Diseases, Hangzhou 310003, China
  • 4Innovation Center for the Study of Pancreatic Diseases of Zhejiang Province, Hangzhou 310009, China
  • 5Cancer Center, Zhejiang University, Hangzhou 310058, China
Published: 2023-04-10 doi: 10.1186/s40779-022-00399-8
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Cholangiocarcinoma (CHOL) is one of the most aggressive tumors worldwide and cannot be effectively treated by conventional and novel treatments, including immune checkpoint blockade therapy. The mRNA vaccine-based immunotherapeutic strategy has attracted much attention for various diseases, however, its application in CHOL is limited due to the thoughtlessness in the integration of vaccine design and patient selection. A recent study established an integrated path for identifying potent CHOL antigens for mRNA vaccine development and a precise stratification for identifying CHOL patients who can benefit from the mRNA vaccines. In spite of a promising prospect, further investigations should identify immunogenic antigens and onco-immunological characteristics of CHOL to guide the clinical application of CHOL mRNA vaccines in the future.

Cholangiocarcinoma (CHOL)  /  mRNA vaccine  /  Tumor antigen  /  Immune subtype  /  Immune microenvironment
Tian-Yu Tang, Xing Huang, Gang Zhang, Ming-Hao Lu, Ting-Bo Liang. mRNA vaccine development for cholangiocarcinoma: a precise pipeline[J]. Military Medical Research, 2023 , 10 (2) : 262 -267 . DOI: 10.1186/s40779-022-00399-8
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Background
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Cholangiocarcinoma (CHOL) is the second most common hepatobiliary cancer and one of the most aggressive tumors worldwide[1]. Surgical resection can be curative for some CHOL patients who present with early-stage disease[1,2]. However, CHOL is mostly detected at an advanced stage, and thus most patients are late for surgery[3]. Besides, most patients with unresectable CHOL get little benefit from systematic treatments. For instance, gemcitabine and cisplatin, as first-line treatments for CHOL, can only achieve an overall survival of less than 1 year[4]. Although fibroblast growth factor receptor and isocitrate dehydrogenase mutations-targeted drugs, as second-line treatments, can achieve a 30%–35% response rate, most CHOL patients do not have such mutations and are thus not suitable for such targeted therapies[5-7]. Additionally, mitogen-activated protein kinase inhibitor selumetinib shows poor efficacy in patients with metastatic biliary cancer[8], while hepatocyte growth factor receptor inhibitor tivantinib combined with gemcitabine has a partial response in only 20% of patients[9].
Current dilemma in CHOL immunotherapy
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Since immune system plays a critical role in recognition and elimination of malignant cells, intensive studies have been conducted to seek effective approaches for activating anti-tumor immune response in the past 2 decades[10]. The immune checkpoint proteins, including programmed death (ligand)-1 [PD-(L)1] and cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4), help tumor cells escape from immune surveillance, and thus immune checkpoint blockade (ICB) therapy targeting such proteins has been approved to treat a wide range of tumors[10-12]. Although ICB has achieved great success in cancer immunotherapy in recent years, it has limited efficacy in CHOL[13,14]. In KEYNOTE028, 24 CHOL patients were enrolled in a basket trial involving PD-L1 positive solid tumor and treated with anti-PD-1 antibody pembrolizumab, of which only 4 patients (17%) achieved a partial response. Furthermore, the response rate to ICB was even lower in non-mis-match repair (MMR) deficient CHOL, although the data were mixed[15]. In KEYNOTE-158, a response rate of only 5.8% was detected among 104 patients without known MMR deficiency, with a progression-free survival of less than 2 months[7,15]. Although the response rate of patients with MMR deficiency to ICB exceeded 40%, such MMR deficiency cases only occur in 5% of CHOL patients[3,7]. Previous studies have demonstrated that tumor response to immunotherapy largely depends on the expression levels of tumor-specific antigens that mediate immune recognition on tumors and promote activation of anti-tumor immunity[16-18]. Tumor cells escape immune surveillance by reducing the expression of immunogenic antigens or modifying certain antigens through multiple mechanisms, while lack of tumor-specific antigen stimulation can lead to T-cell exhaustion, eventually resulting in primary and acquired tumor resistance to immunotherapy[19-23].
Tumor vaccines for CHOL treatment
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Tumor vaccines activating anti-tumor immunity with immunogenic tumor-specific or nonspecific antigens are emerging therapeutic strategies for CHOL[23,24]. Several vaccine-based strategies, including carcinoembryonic antigen RNA-pulsed dendritic cell (DC) and immunogenic peptides plus gemcitabine, have been developed for CHOL treatment, singly or in combination (Table 1)[25-27]. The mRNA vaccine has attracted much attention in the past decades since it can stimulate immune activation through multiple mechanisms[28]. Conventionally, mRNA vaccines can be processed as normal endogenous mRNAs in antigen-presenting cells (APCs), inducing antigen expression and presentation on major histocompatibility complex class I (MHC-I) for CD8+ T cell activation and major histocompatibility complex class II (MHC-II) for CD4+ T cell activation[14,24]. Moreover, mRNA can activate immune systems via Toll-like receptors (TLR3, TLR7, and TLR8) located on the plasma membrane or endosome of APCs, leading to cytokine production and providing an essential costimulatory signal for the activation of T and B cells[29,30]. Additionally, mRNA can upregulate chemokine production in non-immune cells through sensing by RIG-I-like receptors, thus recruiting APCs and other immune cells to the injection sites[31,32]. Notably, mRNA vaccines have more advantages than previously studied vaccine models for CHOL. First, mRNA vaccines can be produced on a large scale within a short period due to their mature manufacturing and cost-effective process[24,33]. Second, mRNA vaccines can mediate the transient expression of the selected antigens without the risk of being integrated into the host genome and thus are much safer than DNA and viral vaccines[24,34]. Third, mRNA vaccines can relatively alleviate adverse effects due to the short-term expression of encoded peptides[33,34]. Finally, the mRNA-based techniques allow the development of a personalized treatment based on individual sequencing data of tumor samples[24,33]. As a result, the mRNA vaccines may become the next hotspot in cancer immunotherapy (Table 2)[35-42].
An integrated path to identify potent CHOL antigens for mRNA vaccine development
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The precise identification of most immunogenic stimulators as potent candidates for optimal immune response and therapeutic efficacy is one of the critical steps for mRNA vaccine development. Previous studies have demonstrated that bioinformatics can help identify therapeutic targets and antigens and help understand tumor-host interplay from an immune perspective. cBioPortal for Cancer Genomics, Gene Expression Profiling Interactive Analysis (GEPIA), and Tumor Immune Estimation Resource (TIMER) are well-established, easily accessible databases that largely lower the threshold of bioinformatics analysis. Particularly, the cBioPortal for Cancer Genomics is an online tool used to analyze the raw data from large-scale genomic projects, including The Cancer Genome Atlas (TCGA) and the International Cancer Genome Consortium (ICGC)[43]. GEPIA is an online resource integrating RNA sequencing data from both tumors and normal samples of the TCGA and the Genotype-Tissue Expression (GTEx) programs[44]. TIMER is an online tool for immune infiltration analysis across discrete cancers[45]. Based on these online databases and bioinformatic approaches, a new pipeline has been established to identify promising antigens for mRNA CHOL vaccine development[46]. Briefly, 1391 genes with both amplified copy numbers and mutations in CHOL were first determined as potential candidates. Subsequently, the prognostic values of the amplified and mutated genes were analyzed. Fifteen candidates were identified as closely associated with overall survival, of which 3 were also correlated with progression-free survival. Elevated mRNA levels of the three candidates [transformation/transcription domain associated protein (TRRAP), fragment crystallizable (Fc) fragment of IgG receptor 1A (FCGR1A), and CD247] were significantly correlated with a better prognosis of CHOL. Moreover, the elevated expression levels of FCGR1A, TRRAP, and CD247 were closely associated with the infiltration of DCs, macrophages, and B cells. As a result, the three antigens were identified as potential candidates for the development of CHOL mRNA vaccine, boosting antitumor immunity after delivery to the adapted immune system.
A precise stratification for the identification of suitable CHOL patients for mRNA vaccine
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Identifying suitable patients with the highest probability of benefiting from the treatment is also crucial for the mRNA vaccine development process[47]. Mounting evidence indicates that the distinction of tumor immune microenvironment largely determines the immunotherapeutic efficacy in different cancer patients[22]. As a result, the CHOL patients have recently been stratified into two distinct immune subtypes (ISs) with the maximum intergroup and the minimum intragroup variances (IS1 and IS2, respectively) based on the gene profiles extracted from TCGA and Gene Expression Omnibus (GEO)[46]. ISs are closely correlated with the prognosis of CHOL patients. Moreover, genes associated with immunogenic cell death and immune checkpoint are differentially expressed in the two ISs. The immune cell components in these two ISs have also been analyzed. IS1 has an immune “hot” phenotype with increased scores of activated CD8 T cells, memory T cells, and immune suppressive cell subsets [myeloid-derived suppressor cell (MDSC), macrophage, and Treg]. In contrast, IS2 has an immune “cold” phenotype with decreased immune cell infiltration. The molecular signature analysis has further confirmed the immune characteristics of the two ISs, indicating that IS2 patients may benefit from mRNA vaccine for immune status alteration. The intergroup heterogeneity of ISs has been visualized through the construction of the immune landscape of CHOL, where the two ISs were further divided into smaller subgroups with distinct prognoses, thus providing valuable information for patient selection for mRNA vaccine treatment. Finally, the immune gene co-expression modules have been analyzed to identify immune hub for selecting suitable CHOL patients for treatment with mRNA vaccines[22].
Conclusions
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The novel pipeline collectively provides a practical approach for the development of an mRNA vaccine for CHOL, particularly in selecting potent antigens and appropriate patients. Notably, although treatment with mRNA vaccines is promising, mRNA vaccines for CHOL patients are still in the initial stages and may face several challenges in the future. First, an in silico study has identified potential CHOL antigens based on integrated information of expression, mutation, prognostic value, and correlation with infiltrated immune cells, however, it is difficult to estimate whether such candidates can induce anti-CHOL immunity in vivo. Moreover, at advanced stages, CHOL may have already developed numerous mechanisms for immune escape, eventually causing therapeutic resistance. Additionally, the requirement for activation of anti-tumor immunity is highly variable among different patients due to CHOL heterogeneity. Last but not least, the required dosage of mRNA vaccine to treat tumors is usually higher than prophylactic vaccination for infectious diseases, which may raise concerns about the safety of mRNA vaccines in CHOL patients. Therefore, advanced investigations focusing on understanding the onco-immunological characteristics of CHOL, especially the intra-tumoral heterogeneity, tumor-microenvironmental crosstalk, and microenvironmental instability, are needed for precise and feasible application of CHOL mRNA vaccine in clinics, improvement of its effectiveness and safety, as well as the prognosis of CHOL patients.
Abbreviations
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APC: Antigen-presenting cell; CHOL: Cholangiocarcinoma; CTLA-4: Cytotoxic T-lymphocyte-associated protein 4; DC: Dendritic cell; GEO: Gene expression omnibus; GEPIA: Gene expression profiling interactive analysis; GTEx: Genotype-tissue expression; ICB: Immune checkpoint blockade; ICGC: International cancer genome consortium; IS: Immune subtype; MDSC: Myeloid-derived suppressor cell; MHC-I: Major histocompatibility complex class I; MHC-II: Major histocompatibility complex class II; MMR: Mis-match repair; PD-(L)1: Programmed death (ligand)-1; TCGA: The cancer genome atlas; TLR: Toll-like receptor; TIMER: Tumor immune estimation resource.
Acknowledgements
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The author Xing Huang would like to express his deepest gratitude to Prof. Guido Kroemer for cancer immunity-associated technological training, conceptual inspiration, and moral edification in his laboratory.
Author' contributions
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XH and TBL conceived the manuscript and share the senior authorship. TYT and XH contributed equally to the literature review and writing. GZ and MHL helped in proof-reading. All authors read and approved the final manuscript.
Availability of data and materials
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Data sharing is not applicable to this article as no datasets were generated or analyzed during the current study.
Declarations
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Ethics approval and consent to participate
Not applicable.
Consent for publication
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Not applicable.
Competing interests
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The authors declare that they have no competing interests.
Author details
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1Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China. 2Zhejiang Provincial Key Laboratory of Pancreatic Disease, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China. 3Zhejiang Clinical Research Center of Hepatobiliary and Pancreatic Diseases, Hangzhou 310003, China. 4Innovation Center for the Study of Pancreatic Diseases of Zhejiang Province, Hangzhou 310009, China. 5Cancer Center, Zhejiang University, Hangzhou 310058, China.
Funding
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  • National Natural Science Foundation of China(31970696)
  • National Natural Science Foundation of China(81502975)
  • National Natural Science Foundation of China(81830089)
  • National Natural Science Foundation of China(U20A20378)
  • National Natural Science Foundation of China(82188102)
  • Zhejiang Provincial Natural Science Foundation for Distinguished Young Scholar(LR22H160010)
  • National Key Research and Development Program(2019YFC1316000)
  • Zhejiang Provincial Key Research and Development Program(2019C03019)
  • Zhejiang Provincial College Student Science and Technology Innovation Activity Plan-College Student Innovation and Entrepreneurship Incubation Program (Young Talent Program)(2022R40122)
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Year 2023 volume 10 Issue 2
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Article Info
doi: 10.1186/s40779-022-00399-8
  • Online Date：2025-11-27
  • Published：2023-04-10
Article Data
Affiliations
History
Funding
National Natural Science Foundation of China(31970696)
National Natural Science Foundation of China(81502975)
National Natural Science Foundation of China(81830089)
National Natural Science Foundation of China(U20A20378)
National Natural Science Foundation of China(82188102)
Zhejiang Provincial Natural Science Foundation for Distinguished Young Scholar(LR22H160010)
National Key Research and Development Program(2019YFC1316000)
Zhejiang Provincial Key Research and Development Program(2019C03019)
Zhejiang Provincial College Student Science and Technology Innovation Activity Plan-College Student Innovation and Entrepreneurship Incubation Program (Young Talent Program)(2022R40122)
Affiliations
    1Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
    2Zhejiang Provincial Key Laboratory of Pancreatic Disease, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
    3Zhejiang Clinical Research Center of Hepatobiliary and Pancreatic Diseases, Hangzhou 310003, China
    4Innovation Center for the Study of Pancreatic Diseases of Zhejiang Province, Hangzhou 310009, China
    5Cancer Center, Zhejiang University, Hangzhou 310058, China

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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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