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Zeng Y, Liu X, Yi Q, Qiao G, Wang L, Chen L, Fan L, Li Y, Duan L, Huang L, Zhuang Q, Zhou Y, Xiong Y. Free total rhubarb anthraquinones protect intestinal mucosal barrier of SAP rats via inhibiting the NLRP3/caspase-1/GSDMD pyroptotic pathway. JOURNAL OF ETHNOPHARMACOLOGY 2024; 326:117873. [PMID: 38346523 DOI: 10.1016/j.jep.2024.117873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/27/2024] [Accepted: 02/04/2024] [Indexed: 02/24/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Rhubarb is the peeled and dried roots of Rheum palmatum L. and Rheum tanguticum Maxim. ex Balf. or Rheum officinale Baill. Free total rhubarb anthraquinones (FTRAs) were isolated and extracted from rhubarb. Previous studies have revealed that the early administration of FTRAs protects the intestinal mucosal barrier in rats with severe acute pancreatitis (SAP), the mechanism of which is not yet clear. However, we observed an enhanced expression of intestinal pyroptotic factors in rats treated with SAP, which may be related to the mechanism of intestinal barrier protection by FTRAs. AIM OF THE STUDY The main objective of this study was to investigate the mechanism by which FTRAs protect the intestinal mucosal barrier in SAP rats, focusing on the classical pyroptosis pathway. MATERIALS AND METHODS SAP was induced in rats through retrograde injection of sodium taurocholate via the pancreaticobiliary duct. Subsequently, FTRAs (22.5, 45, and 90 mg/kg), rhubarb (900 mg/kg, positive control), and saline (control) were administered at 0 h (immediately), 12 h, and 24 h post-surgery. Pancreatic and intestinal tissue injury, positive PI staining rate, and expression levels of various factors in intestinal tissues were compared across different groups. These factors include diamine oxidase (DAO), lactate dehydrogenase (LDH), high mobility group box chromosomal protein 1(HMGB1) and pro-inflammatory factors in intestinal and serum, pyroptosis-associated factors, toll-like receptor 4 (TLR-4), nuclear factor kappa-B (NF-kB), apoptosis-associated speck-like protein (ASC), NOD-like receptor protein 3 (NLRP3), cysteine protease-1 (caspase-1) and Gasdermin (GSDMD). RESULTS The findings indicated that FTRAs protected the damaged intestine and pancreas and restored the expression of intestinal epithelial junction proteins in SAP rats. Additionally, it reduced intestinal and serum levels of DAO, interleukin 1, interleukin 18, HMGB1, and LDH, attenuated intestinal Positive PI staining rate, and significantly decreased the expressions of TLR-4, NF-kB, ASC, NLRP3, caspase-1 and GSDMD in SAP rats. CONCLUSIONS The results suggest that FTRAs inhibited pyroptosis through down-regulation of the NLRP3-Caspase-1-GSDMD and TLR-4- NF-kB signaling pathways of intestinal tissues., thereby protecting the intestinal barrier of SAP rats.
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Affiliation(s)
- Yue Zeng
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China; Department of Pharmacy, People's Hospital of Zhongjiang County, Deyang, Sichuan, 618000, China
| | - Xingyu Liu
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Qing Yi
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Gan Qiao
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Lulu Wang
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Li Chen
- Department of Pharmacy, Affiliated Hospital of Traditional Chinese Medicine, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Ling Fan
- Department of Pharmacy, People's Hospital of Ya'an, Ya'an, 625000, China
| | - Yao Li
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Lingjing Duan
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Liqiang Huang
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China; Department of Pharmacy, Second People's Hospital of Yibin, Yibin, 644000, China
| | - Qian Zhuang
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Yejiang Zhou
- Department of Gastrointestinal Surgery, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, 646000, China.
| | - Yuxia Xiong
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China.
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Zhu Z, Yi B, Tang Z, Chen X, Li M, Xu T, Zhao Z, Tang C. Lactobacillus casei combined with Lactobacillus reuteri alleviate pancreatic cancer by inhibiting TLR4 to promote macrophage M1 polarization and regulate gut microbial homeostasis. BMC Cancer 2023; 23:1044. [PMID: 37904102 PMCID: PMC10614400 DOI: 10.1186/s12885-023-11557-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 10/22/2023] [Indexed: 11/01/2023] Open
Abstract
BACKGROUND Pancreatic cancer is a highly lethal disease with no effective treatments. Lactobacillus casei (L. casei) and Lactobacillus reuteri (L. reuteri) exhibited therapeutic effects on several cancers, but their roles in pancreatic cancer are unknown. This study aims to explore how L. casei & L. reuteri influence pancreatic cancer and the underlying mechanisms. METHODS Pancreatic cancer cells were treated with L. casei & L. reuteri and co-cultured with macrophages in a transwell system in vitro. Pancreatic cancer xenograft model was established and L. casei & L. reuteri was used to treat mice in vivo. MTT, CCK-8 assay or immunohistochemical staining were used to determine the proliferation of pancreatic cancer cells or tumor tissues. Transwell assay was applied to test the migration and invasion of pancreatic cells. RT-qPCR was utilized to assess TLR4 and MyD88 expressions in pancreatic cells or tumor tissues. WB, immunofluorescence staining, or flow cytometry was used to evaluate the M1/M2 polarization of macrophages. Besides, the composition of gut microbiota of tumor-bearing mice was determined by 16 S rRNA sequencing, and ultra-high performance liquid chromatography-mass spectrometry (UPLC-MS) untargeted metabolomics was used to evaluate the metabolic profiles of feces. RESULTS L. casei & L. reuteri inhibited the proliferation, migration, invasion of pancreatic cancer cells and pancreatic cancer cell-induced M2 polarization of macrophages by suppressing TLR4. Meanwhile, L. casei & L. reuteri repressed pancreatic cancer growth and promoted M1 macrophage polarization. Besides, L. casei & L. reuteri reduced fecal Alloprevotella and increased fecal azelate and glutamate in nude mice, while TLR4 inhibitor TAK-242 increased Clostridia UCG-014, azelate, uridine, methionine sulfoxide, oxypurinol, and decreased glyceryl monoester in the feces of pancreatic tumor-bearing mice. Fecal oxypurinol and glyceryl monoester levels were positively or negatively associated with gut Clostridia UCG-014 abundance, respectively. CONCLUSION L. casei & L. reuteri alleviate pancreatic cancer by inhibiting TLR4 to promote macrophage M1 polarization and regulate gut microbial homeostasis.
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Affiliation(s)
- Zemin Zhu
- Department of Hepatobiliary and Pancreatic Surgery, Zhuzhou Central Hospital, Zhuzhou, China
| | - Bo Yi
- Department of Hepatobiliary and Pancreatic Surgery, Zhuzhou Central Hospital, Zhuzhou, China
| | - Zikai Tang
- Department of Hepatobiliary and Pancreatic Surgery, Zhuzhou Central Hospital, Zhuzhou, China
| | - Xun Chen
- Department of Hepatobiliary and Pancreatic Surgery, Zhuzhou Central Hospital, Zhuzhou, China
- Department of Trauma Center, Zhuzhou Central Hospital, Zhuzhou, China
| | - Ming Li
- Department of Trauma Center, Zhuzhou Central Hospital, Zhuzhou, China
| | - Tao Xu
- Department of Hepatobiliary and Pancreatic Surgery, Zhuzhou Central Hospital, Zhuzhou, China
| | - Zhijian Zhao
- Department of Hepatobiliary and Pancreatic Surgery, Zhuzhou Central Hospital, Zhuzhou, China.
| | - Caixi Tang
- Department of Hepatobiliary and Pancreatic Surgery, Zhuzhou Central Hospital, Zhuzhou, China.
- Department of Trauma Center, Zhuzhou Central Hospital, Zhuzhou, China.
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Qian J, Zhang X, Wei B, Tang Z, Zhang B. The correlation between gut and intra-tumor microbiota and PDAC: Etiology, diagnostics and therapeutics. Biochim Biophys Acta Rev Cancer 2023; 1878:188943. [PMID: 37355177 DOI: 10.1016/j.bbcan.2023.188943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/16/2023] [Accepted: 06/16/2023] [Indexed: 06/26/2023]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is one of the lethal cancers in the world and its 5-year survival rate is <10%. Due to the unique TME and dense tissue structure, its curative efficacy is far from satisfactory,the immunotherapy is even more invalid. According to the recent studies, the gut and tumor microbiota have been proved to play a key role in the development, progression and prognosis of PDAC. Based on the differences of microbiome composition observed in PDAC patients and normal pancreas, many researches have been made focusing on the latent communication between gut and intra-tumor microbiota and PDAC. In this review, we will demonstrate the potential mechanism of the oncogenic effects of GM and IM and their crucial effects on modulating the TME. Besides, we focus on their interaction with chemotherapeutic and immunotherapeutic drugs and inducing the drug resistance, thus enlightening the promising role to be used to monitor the occurrence of PDAC, accurately modulate the immune environment to promote the therapeutic efficacy and predict the prognosis.
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Affiliation(s)
- Jiwei Qian
- The Fourth affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Xin Zhang
- The Fourth affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Butian Wei
- The Fourth affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Zhe Tang
- The Fourth affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China
| | - Bo Zhang
- The Second affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 31000, China.
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Yang B, Xiong Z, Lin M, Yang Y, Chen Y, Zeng J, Jia X, Feng L. Astragalus polysaccharides alleviate type 1 diabetes via modulating gut microbiota in mice. Int J Biol Macromol 2023; 234:123767. [PMID: 36812962 DOI: 10.1016/j.ijbiomac.2023.123767] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 01/31/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023]
Abstract
Type 1 diabetes (T1D) is a serious health problem that needs to be addressed worldwide. Astragalus polysaccharides (APS), the main chemical components of Astragali Radix, have anti-diabetic activity. As most plant polysaccharides are difficult to digest and absorb, we hypothesised that APS exert hypoglycaemic effects through the gut. This study intends to investigate the modulation of T1D associated with gut microbiota by neutral fraction of Astragalus polysaccharides (APS-1). T1D mice were induced with streptozotocin and then treated with APS-1 for 8 weeks. Fasting blood glucose levels were decreased and the insulin levels were increased in T1D mice. The results demonstrated that APS-1 improved gut barrier function by regulating ZO-1, Occludin and Claudin-1 expression, and reconstructed gut microbiota by increasing the relative abundance of Muribaculum, Lactobacillus and Faecalibaculum. In addition, APS-1 significantly increased the levels of acetic acid, propionic acid, butyric acid and inhibited the expression of pro-inflammatory factors IL-6 and TNF-α in T1D mice. Further exploration revealed that APS-1 alleviation of T1D may be associated with short-chain fatty acids (SCFAs)-producing bacteria, and that SCFAs binds to GPRs and HDACs proteins and modulate the inflammatory responses. In conclusion, the study supports the potential of APS-1 as a therapeutic agent for T1D.
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Affiliation(s)
- Bing Yang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Zhiwei Xiong
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China
| | - Meng Lin
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China
| | - Yanjun Yang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China
| | - Yaping Chen
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China
| | - Jingqi Zeng
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China
| | - Xiaobin Jia
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China.
| | - Liang Feng
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China.
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Wang Y, Qu S, Chen M, Cui Y, Shi C, Pu X, Gao W, Li Q, Han J, Zhang A. Effects of buckwheat milk Co-fermented with two probiotics and two commercial yoghurt strains on gut microbiota and production of short-chain Fatty Acids. FOOD BIOSCI 2023. [DOI: 10.1016/j.fbio.2023.102537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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6
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Wang XH, Xu DQ, Chen YY, Yue SJ, Fu RJ, Huang L, Tang YP. Traditional Chinese Medicine: A promising strategy to regulate inflammation, intestinal disorders and impaired immune function due to sepsis. Front Pharmacol 2022; 13:952938. [PMID: 36188532 PMCID: PMC9523403 DOI: 10.3389/fphar.2022.952938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 08/29/2022] [Indexed: 11/16/2022] Open
Abstract
Sepsis is described as a dysregulation of the immune response to infection, which leads to life-threatening organ dysfunction. The interaction between intestinal microbiota and sepsis can’t be ignored. Furthermore, the intestinal microbiota may regulate the progress of sepsis and attenuate organ damage. Thus, maintaining or restoring microbiota may be a new way to treat sepsis. Traditional Chinese medicine (TCM) assumes a significant part in the treatment of sepsis through multi-component, multi-pathway, and multi-targeting abilities. Moreover, TCM can prevent the progress of sepsis and improve the prognosis of patients with sepsis by improving the imbalance of intestinal microbiota, improving immunity and reducing the damage to the intestinal barrier. This paper expounds the interaction between intestinal microbiota and sepsis, then reviews the current research on the treatment of sepsis with TCM, to provide a theoretical basis for its clinical application.
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Xu F, Yang C, Tang M, Wang M, Cheng Z, Chen D, Chen X, Liu K. The Role of Gut Microbiota and Genetic Susceptibility in the Pathogenesis of Pancreatitis. Gut Liver 2021; 16:686-696. [PMID: 34911043 PMCID: PMC9474482 DOI: 10.5009/gnl210362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/06/2021] [Accepted: 09/17/2021] [Indexed: 11/22/2022] Open
Abstract
Pancreatitis is one of the most common inflammatory diseases of the pancreas caused by autodigestion induced by excessive premature protease activation. However, recognition of novel pathophysiological mechanisms remains a still challenge. Both genetic and environmental factors contribute to the pathogenesis of pancreatitis, and the gut microbiota is a potential source of an environmental effect. In recent years, several new frontiers in gut microbiota and genetic risk assessment research have emerged and improved the understanding of the disease. These investigations showed that the disease progression of pancreatitis could be regulated by the gut microbiome, either through a translocation influence or in a host immune response manner. Meanwhile, the onset of the disease is also associated with the heritage of a pathogenic mutation, and the disease progression could be modified by genetic risk factors. In this review, we focused on the recent advances in the role of gut microbiota in the pathogenesis of pancreatitis, and the genetic susceptibility in pancreatitis.
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Affiliation(s)
- Fumin Xu
- Department of Gastroenterology, Daping Hospital, Army Medical University, Chongqing, China
| | - Chunmei Yang
- Department of Gastroenterology, Daping Hospital, Army Medical University, Chongqing, China
| | - Mingcheng Tang
- Department of Gastroenterology, Daping Hospital, Army Medical University, Chongqing, China
| | - Ming Wang
- Department of Gastroenterology, Daping Hospital, Army Medical University, Chongqing, China
| | - Zhenhao Cheng
- Department of Gastroenterology, Daping Hospital, Army Medical University, Chongqing, China
| | - Dongfeng Chen
- Department of Gastroenterology, Daping Hospital, Army Medical University, Chongqing, China
| | - Xiao Chen
- Department of Nuclear Medicine, Daping Hospital, Army Medical University, Chongqing, China
| | - Kaijun Liu
- Department of Gastroenterology, Daping Hospital, Army Medical University, Chongqing, China
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Elaskandrany M, Patel R, Patel M, Miller G, Saxena D, Saxena A. Fungi, host immune response, and tumorigenesis. Am J Physiol Gastrointest Liver Physiol 2021; 321:G213-G222. [PMID: 34231392 PMCID: PMC8410104 DOI: 10.1152/ajpgi.00025.2021] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Advances in -omics analyses have tremendously enhanced our understanding of the role of the microbiome in human health and disease. Most research is focused on the bacteriome, but scientists have now realized the significance of the virome and microbial dysbiosis as well, particularly in noninfectious diseases such as cancer. In this review, we summarize the role of mycobiome in tumorigenesis, with a dismal prognosis, and attention to pancreatic ductal adenocarcinoma (PDAC). We also discuss bacterial and mycobial interactions to the host's immune response that is prevalently responsible for resistance to cancer therapy, including immunotherapy. We reported that the Malassezia species associated with scalp and skin infections, colonize in human PDAC tumors and accelerate tumorigenesis via activating the C3 complement-mannose-binding lectin (MBL) pathway. PDAC tumors thrive in an immunosuppressive microenvironment with desmoplastic stroma and a dysbiotic microbiome. Host-microbiome interactions in the tumor milieu pose a significant threat in driving the indolent immune behavior of the tumor. Microbial intervention in multimodal cancer therapy is a promising novel approach to modify an immunotolerant ("cold") tumor microenvironment to an immunocompetent ("hot") milieu that is effective in eliminating tumorigenesis.
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Affiliation(s)
- Miar Elaskandrany
- 1Biology Department, Brooklyn College, City University of New York, New York, New York,2Macaulay Honors Academy, Brooklyn College, City University of New York, New York, New York
| | - Rohin Patel
- 1Biology Department, Brooklyn College, City University of New York, New York, New York
| | - Mintoo Patel
- 3Natural Sciences, South Florida State College, Avon Park, Florida
| | - George Miller
- 4New York City Health & Hospitals (Woodhull), New York, New York
| | - Deepak Saxena
- 5Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York,6Department of Surgery, New York University School of Medicine, New York, New York
| | - Anjana Saxena
- 1Biology Department, Brooklyn College, City University of New York, New York, New York,7Biology and Biochemistry Programs, Graduate Center, City
University of New York (CUNY), New York, New York
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Bidirectional and dynamic interaction between the microbiota and therapeutic resistance in pancreatic cancer. Biochim Biophys Acta Rev Cancer 2020; 1875:188484. [PMID: 33246025 DOI: 10.1016/j.bbcan.2020.188484] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 11/06/2020] [Accepted: 11/19/2020] [Indexed: 12/12/2022]
Abstract
Pancreatic ductal adenocarcinoma is one of the most lethal malignancies and is known for its high resistance and low response to treatment. Cancer treatments can reshape the microbiota and in turn, the microbiota influences the therapeutic efficacy by regulating immune response and metabolism. This crosstalk is bidirectional, heterogeneous, and dynamic. In this review, we elaborated on the interactions between the microbiota and therapeutic resistance in pancreatic ductal adenocarcinoma. Regulating the microbiota in pancreatic tumor microenvironment may not only generate direct anti-cancer but also synergistic effects with other treatments, providing new directions in cancer therapy.
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Pancreatic Diseases and Microbiota: A Literature Review and Future Perspectives. J Clin Med 2020; 9:jcm9113535. [PMID: 33139601 PMCID: PMC7692447 DOI: 10.3390/jcm9113535] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 10/28/2020] [Accepted: 10/30/2020] [Indexed: 12/12/2022] Open
Abstract
Gut microbiota represent an interesting worldwide research area. Several studies confirm that microbiota has a key role in human diseases, both intestinal (such as inflammatory bowel disease, celiac disease, intestinal infectious diseases, irritable bowel syndrome) and extra intestinal disorders (such as autism, multiple sclerosis, rheumatologic diseases). Nowadays, it is possible to manipulate microbiota by administering prebiotics, probiotics or synbiotics, through fecal microbiota transplantation in selected cases. In this scenario, pancreatic disorders might be influenced by gut microbiota and this relationship could be an innovative and inspiring field of research. However, data are still scarce and controversial. Microbiota manipulation could represent an important therapeutic strategy in the pancreatic diseases, in addition to standard therapies. In this review, we analyze current knowledge about correlation between gut microbiota and pancreatic diseases, by discussing on the one hand existing data and on the other hand future possible perspectives.
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Jiang L, Ling-Hu EQ, Chai NL, Li W, Cai FC, Li MY, Guo X, Meng JY, Wang XD, Tang P, Zhu J, Du H, Wang HB. Novel endoscopic papillectomy for reducing postoperative adverse events (with videos). World J Gastroenterol 2020; 26:6250-6259. [PMID: 33177797 PMCID: PMC7596639 DOI: 10.3748/wjg.v26.i40.6250] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 09/04/2020] [Accepted: 09/17/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Pancreatic adenoma can potentially transform into adenocarcinoma, so it is recommended to be resected surgically or endoscopically. Endoscopic papillectomy is one of the main treatments for papillary adenoma, and bleeding, perforation, and pancreatitis are the most frequent and critical adverse events that restrict its wider use. There is no standard procedure for endoscopic papillectomy yet. The procedure is relevant to postoperative adverse events.
AIM To reduce the postoperative adverse event rates and improve patients’ postoperative condition, we developed a standard novel procedure for endoscopic papillectomy.
METHODS The novel endoscopic papillectomy had two main modifications based on the conventional method: The isolation of bile from pancreatic juice with a bile duct stent and wound surface protection with metal clips and fibrin glue. We performed a single-center retrospective comparison study on the novel and conventional methods to examine the feasibility of the novel method for reducing postoperative adverse events.
RESULTS A total of 76 patients, of whom 23 underwent the novel procedure and 53 underwent the conventional procedure, were retrospectively evaluated in this study. The postoperative bleeding and pancreatitis rates of the novel method were significantly lower than those of the conventional method (0 vs 20.75%, P = 0.028, and 17.4% vs 41.5%, P = 0.042, respectively). After applying the novel method, the most critical adverse event, perforation, was entirely prevented, compared to a prevalence of 5.66% with the conventional method. Several postoperative symptoms, including fever, rapid pulse, and decrease in hemoglobin level, were significantly less frequent in the novel group (P = 0.042, 0.049, and 0.014, respectively). Overall, the total adverse event rate of the novel method was lower (0 vs 24.5%, P = 0.007) than that of the conventional method.
CONCLUSION Patients who underwent the novel procedure had lower postoperative adverse event rates. This study demonstrates the potential efficacy and safety of the novel endoscopic papillectomy in reducing postoperative adverse events.
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Affiliation(s)
- Lei Jiang
- School of Medicine, Nankai University, Tianjin 300071, China
| | - En-Qiang Ling-Hu
- School of Medicine, Nankai University, Tianjin 300071, China
- Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Ning-Li Chai
- School of Medicine, Nankai University, Tianjin 300071, China
- Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Wen Li
- Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Feng-Chun Cai
- Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Ming-Yang Li
- Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Xu Guo
- Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Jiang-Yun Meng
- Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Xiang-Dong Wang
- Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Ping Tang
- Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Jing Zhu
- Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Hong Du
- Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Hong-Bin Wang
- Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
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Li P, Shu Y, Gu Y. The potential role of bacteria in pancreatic cancer: a systematic review. Carcinogenesis 2020; 41:397-404. [PMID: 32034405 DOI: 10.1093/carcin/bgaa013] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 01/18/2020] [Accepted: 02/06/2020] [Indexed: 02/06/2023] Open
Abstract
Pancreatic cancer is a lethal and devastating disease in the worldwide. Recognized risk factors for pancreatic cancer include cigarette smoking, obesity, type II diabetes and chronic pancreatitis. Other factors such as variant ABO blood type and Helicobacter pylori may also play an important role in pancreatic carcinogenesis. Recently, growing evidence suggests that the association between bacteria and pancreatic cancer is positive and related immune/inflammation activation and increased nitrosamine exposure may be its potential mechanism. Interestingly, it is debatable whether the relationship of bacteria and pancreatic cancer is causative, reactive or parallel and future studies are in progress. Here we review recent progress in pancreatic cancer and its related bacteria.
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Affiliation(s)
- Ping Li
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Yongqian Shu
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Yanhong Gu
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
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13
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State of the Art in Exocrine Pancreatic Insufficiency. Medicina (B Aires) 2020; 56:medicina56100523. [PMID: 33036352 PMCID: PMC7599987 DOI: 10.3390/medicina56100523] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 09/30/2020] [Accepted: 10/02/2020] [Indexed: 12/26/2022] Open
Abstract
Exocrine pancreatic insufficiency (EPI) is defined as the maldigestion of foods due to inadequate pancreatic secretion, which can be caused by alterations in its stimulation, production, transport, or interaction with nutrients at duodenal level. The most frequent causes are chronic pancreatitis in adults and cystic fibrosis in children. The prevalence of EPI is high, varying according to its etiology, but it is considered to be underdiagnosed and undertreated. Its importance lies in the quality of life impairment that results from the malabsorption and malnutrition and in the increased morbidity and mortality, being associated with osteoporosis and cardiovascular events. The diagnosis is based on a set of symptoms, indicators of malnutrition, and an indirect non-invasive test in at-risk patients. The treatment of choice combines non-restrictive dietary measures with pancreatic enzyme replacement therapy to correct the associated symptoms and improve the nutritional status of patients. Non-responders require the adjustment of pancreatic enzyme therapy, the association of proton pump inhibitors, and/or the evaluation of alternative diagnoses such as bacterial overgrowth. This review offers an in-depth overview of EPI in order to support the proper management of this entity based on updated and integrated knowledge of its etiopathogenesis, prevalence, diagnosis, and treatment.
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14
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Ge P, Luo Y, Okoye CS, Chen H, Liu J, Zhang G, Xu C, Chen H. Intestinal barrier damage, systemic inflammatory response syndrome, and acute lung injury: A troublesome trio for acute pancreatitis. Biomed Pharmacother 2020; 132:110770. [PMID: 33011613 DOI: 10.1016/j.biopha.2020.110770] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/11/2020] [Accepted: 09/17/2020] [Indexed: 02/08/2023] Open
Abstract
Severe acute pancreatitis (SAP), a serious inflammatory disease of the pancreas, can easily lead to systemic inflammatory response syndrome (SIRS) and multiple organ dysfunction syndromes (MODS). Acute lung injury (ALI) is one of the most serious complications of SAP. However, the specific pathogenesis of SAP-associated ALI is not fully understood. Crosstalk and multi-mechanisms involving pancreatic necrosis, bacteremia, intestinal barrier failure, activation of inflammatory cascades and diffuse alveolar damage is the main reason for the unclear pathological mechanism of SAP-associated ALI. According to previous research on SAP-associated ALI in our laboratory and theories put forward by other scholars, we propose that the complex pattern of SAP-associated ALI is based on the "pancreas-intestine-inflammation/endotoxin-lung (P-I-I/E-L) pathway". In this review, we mainly concentrated on the specific details of the "P-I-I/E-L pathway" and the potential treatments or preventive measures for SAP-associated ALI.
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Affiliation(s)
- Peng Ge
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, 116011, PR China; Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, 116044, PR China
| | - Yalan Luo
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, 116011, PR China; Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, 116044, PR China
| | - Chukwuemeka Samuel Okoye
- Orthopedic Research Center, Affiliated Zhongshan Hospital of Dalian University, Dalian, 116001, PR China
| | - Haiyang Chen
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, 116011, PR China; Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, 116044, PR China
| | - Jiayue Liu
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, 116011, PR China; Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, 116044, PR China
| | - Guixin Zhang
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, 116011, PR China; Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, 116044, PR China
| | - Caiming Xu
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, 116011, PR China; Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, 116044, PR China.
| | - Hailong Chen
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, 116011, PR China; Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, 116044, PR China.
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15
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The Role of Dysfunctional Adipose Tissue in Pancreatic Cancer: A Molecular Perspective. Cancers (Basel) 2020; 12:cancers12071849. [PMID: 32659999 PMCID: PMC7408631 DOI: 10.3390/cancers12071849] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 07/04/2020] [Accepted: 07/06/2020] [Indexed: 12/24/2022] Open
Abstract
Pancreatic cancer (PC) is a lethal malignancy with rising incidence and limited therapeutic options. Obesity is a well-established risk factor for PC development. Moreover, it negatively affects outcome in PC patients. Excessive fat accumulation in obese, over- and normal-weight individuals induces metabolic and inflammatory changes of adipose tissue microenvironment leading to a dysfunctional adipose “organ”. This may drive the association between abnormal fat accumulation and pancreatic cancer. In this review, we describe several molecular mechanisms that underpin this association at both local and systemic levels. We focus on the role of adipose tissue-derived circulating factors including adipokines, hormones and pro-inflammatory cytokines, as well as on the impact of the local adipose tissue in promoting PC. A discussion on potential therapeutic interventions, interfering with pro-tumorigenic effects of dysfunctional adipose tissue in PC, is included. Considering the raise of global obesity, research efforts to uncover the molecular basis of the relationship between pancreatic cancer and adipose tissue dysfunction may provide novel insights for the prevention of this deadly disease. In addition, these efforts may uncover novel targets for personalized interventional strategies aimed at improving the currently unsatisfactory PC therapeutic options.
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16
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Azevedo MM, Pina-Vaz C, Baltazar F. Microbes and Cancer: Friends or Faux? Int J Mol Sci 2020; 21:ijms21093115. [PMID: 32354115 PMCID: PMC7247677 DOI: 10.3390/ijms21093115] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/23/2020] [Accepted: 04/26/2020] [Indexed: 02/07/2023] Open
Abstract
Cancer is one of the most aggressive and deadly diseases in the world, representing the second leading cause of death. It is a multifactorial disease, in which genetic alterations play a key role, but several environmental factors also contribute to its development and progression. Infections induced by certain viruses, bacteria, fungi and parasites constitute risk factors for cancer, being chronic infection associated to the development of certain types of cancer. On the other hand, susceptibility to infectious diseases is higher in cancer patients. The state of the host immune system plays a crucial role in the susceptibility to both infection and cancer. Importantly, immunosuppressive cancer treatments increase the risk of infection, by decreasing the host defenses. Furthermore, alterations in the host microbiota is also a key factor in the susceptibility to develop cancer. More recently, the identification of a tumor microbiota, in which bacteria establish a symbiotic relationship with cancer cells, opened a new area of research. There is evidence demonstrating that the interaction between bacteria and cancer cells can modulate the anticancer drug response and toxicity. The present review focuses on the interaction between microbes and cancer, specifically aiming to: (1) review the main infectious agents associated with development of cancer and the role of microbiota in cancer susceptibility; (2) highlight the higher vulnerability of cancer patients to acquire infectious diseases; (3) document the relationship between cancer cells and tissue microbiota; (4) describe the role of intratumoral bacteria in the response and toxicity to cancer therapy.
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Affiliation(s)
- Maria Manuel Azevedo
- Department of Microbiology, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- CINTESIS, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- Agrupamento de Escolas D. Maria II, 4760-067 V.N. Famalicão, Portugal
- Correspondence: ; Tel.: +351-22-551-36
| | - Cidália Pina-Vaz
- Department of Microbiology, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- CINTESIS, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Fátima Baltazar
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- ICVS/3B’s—PT Government Associate Laboratory, 4710-057 Braga, Portugal
- ICVS/3B’s—PT Government Associate Laboratory, 4835-258 Guimarães, Portugal
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17
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Oncobiosis and Microbial Metabolite Signaling in Pancreatic Adenocarcinoma. Cancers (Basel) 2020; 12:cancers12051068. [PMID: 32344895 PMCID: PMC7281526 DOI: 10.3390/cancers12051068] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/22/2020] [Accepted: 04/23/2020] [Indexed: 02/06/2023] Open
Abstract
Pancreatic adenocarcinoma is one of the most lethal cancers in both men and women, with a median five-year survival of around 5%. Therefore, pancreatic adenocarcinoma represents an unmet medical need. Neoplastic diseases, such as pancreatic adenocarcinoma, often are associated with microbiome dysbiosis, termed oncobiosis. In pancreatic adenocarcinoma, the oral, duodenal, ductal, and fecal microbiome become dysbiotic. Furthermore, the pancreas frequently becomes colonized (by Helicobacter pylori and Malassezia, among others). The oncobiomes from long- and short-term survivors of pancreatic adenocarcinoma are different and transplantation of the microbiome from long-term survivors into animal models of pancreatic adenocarcinoma prolongs survival. The oncobiome in pancreatic adenocarcinoma modulates the inflammatory processes that drive carcinogenesis. In this review, we point out that bacterial metabolites (short chain fatty acids, secondary bile acids, polyamines, indole-derivatives, etc.) also have a role in the microbiome-driven pathogenesis of pancreatic adenocarcinoma. Finally, we show that bacterial metabolism and the bacterial metabolome is largely dysregulated in pancreatic adenocarcinoma. The pathogenic role of additional metabolites and metabolic pathways will be identified in the near future, widening the scope of this therapeutically and diagnostically exploitable pathogenic pathway in pancreatic adenocarcinoma.
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18
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Organ-level protein networks as a reference for the host effects of the microbiome. Genome Res 2020; 30:276-286. [PMID: 31992612 PMCID: PMC7050531 DOI: 10.1101/gr.256875.119] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 01/21/2020] [Indexed: 02/07/2023]
Abstract
Connections between the microbiome and health are rapidly emerging in a wide range of diseases. However, a detailed mechanistic understanding of how different microbial communities are influencing their hosts is often lacking. One method researchers have used to understand these effects are germ-free (GF) mouse models. Differences found within the organ systems of these model organisms may highlight generalizable mechanisms that microbiome dysbioses have throughout the host. Here, we applied multiplexed, quantitative proteomics on the brains, spleens, hearts, small intestines, and colons of conventionally raised and GF mice, identifying associations to colonization state in over 7000 proteins. Highly ranked associations were constructed into protein–protein interaction networks and visualized onto an interactive 3D mouse model for user-guided exploration. These results act as a resource for microbiome researchers hoping to identify host effects of microbiome colonization on a given organ of interest. Our results include validation of previously reported effects in xenobiotic metabolism, the innate immune system, and glutamate-associated proteins while simultaneously providing organism-wide context. We highlight organism-wide differences in mitochondrial proteins including consistent increases in NNT, a mitochondrial protein with essential roles in influencing levels of NADH and NADPH, in all analyzed organs of conventional mice. Our networks also reveal new associations for further exploration, including protease responses in the spleen, high-density lipoproteins in the heart, and glutamatergic signaling in the brain. In total, our study provides a resource for microbiome researchers through detailed tables and visualization of the protein-level effects of microbial colonization on several organ systems.
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19
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Wang Y, Yang G, You L, Yang J, Feng M, Qiu J, Zhao F, Liu Y, Cao Z, Zheng L, Zhang T, Zhao Y. Role of the microbiome in occurrence, development and treatment of pancreatic cancer. Mol Cancer 2019; 18:173. [PMID: 31785619 PMCID: PMC6885316 DOI: 10.1186/s12943-019-1103-2] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 11/12/2019] [Indexed: 02/06/2023] Open
Abstract
Pancreatic cancer is one of the most lethal malignancies. Recent studies indicated that development of pancreatic cancer may be intimately connected with the microbiome. In this review, we discuss the mechanisms through which microbiomes affect the development of pancreatic cancer, including inflammation and immunomodulation. Potential therapeutic and diagnostic applications of microbiomes are also discussed. For example, microbiomes may serve as diagnostic markers for pancreatic cancer, and may also play an important role in determining the efficacies of treatments such as chemo- and immunotherapies. Future studies will provide additional insights into the various roles of microbiomes in pancreatic cancer.
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Affiliation(s)
- Yicheng Wang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730 China
| | - Gang Yang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730 China
| | - Lei You
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730 China
| | - Jinshou Yang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730 China
| | - Mengyu Feng
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730 China
| | - Jiangdong Qiu
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730 China
| | - Fangyu Zhao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730 China
| | - Yueze Liu
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730 China
| | - Zhe Cao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730 China
| | - Lianfang Zheng
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730 China
| | - Taiping Zhang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730 China
- Clinical Immunology Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730 China
| | - Yupei Zhao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730 China
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20
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Jia L, Chen H, Yang J, Fang X, Niu W, Zhang M, Li J, Pan X, Ren Z, Sun J, Pan LL. Combinatory antibiotic treatment protects against experimental acute pancreatitis by suppressing gut bacterial translocation to pancreas and inhibiting NLRP3 inflammasome pathway. Innate Immun 2019; 26:48-61. [PMID: 31615312 PMCID: PMC6974879 DOI: 10.1177/1753425919881502] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Gut bacterial translocation following impaired gut barrier is a critical
determinant of initiating and aggravating acute pancreatitis (AP). Antibiotic
combination (ABX; vancomycin, neomycin and polymyxin b) is capable of reducing
gut bacteria, but its efficacy in AP prevention and the underlying mechanism
have not been investigated yet. AP was induced in BALB/c mice by caerulein (CAE)
hyperstimulation. We found that ABX supplementation attenuated the severity of
AP as evidenced by reduced pancreatic oedema and myeloperoxidase activity. The
protective effect was also confirmed by improved histological morphology of the
pancreas and decreased pro-inflammatory markers (IL-1β, TNF-α, MCP-1) in
pancreas. ABX administration inhibits the activation of colonic TLR4/NLRP3
inflammasome pathway. Subsequently, down-regulated NLRP3 resulted in decreased
colonic pro-inflammation (IL-1β, IL-6, MCP-1) and enhanced gut physical barrier
as evidenced by up-regulation of tight junction proteins including occludin,
claudin-1 and ZO-1, as well as improved histological morphology of the colon.
Together, combinatory ABX therapy inhibited the translocation of gut bacteria to
pancreas and its amplification effects on pancreatic inflammation by inhibiting
the pancreatic NLRP3 pathway, and inhibiting intestinal-pancreatic inflammatory
responses. The current study provides the basis for potential clinical
application of ABX in AP.
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Affiliation(s)
- Lingling Jia
- Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu, P. R. China
| | - Hao Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R China.,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
| | - Jun Yang
- Public Health Research Center and Department of General Surgery, Affiliated Hospital of Jiangnan University
| | - Xin Fang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R China.,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
| | - Wenying Niu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R China.,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
| | - Ming Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R China.,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
| | - Jiahong Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R China.,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
| | - Xiaohua Pan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R China.,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
| | - Zhengnan Ren
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R China.,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
| | - Jia Sun
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R China.,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
| | - Li-Long Pan
- Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu, P. R. China
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21
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McClave SA. Factors That Worsen Disease Severity in Acute Pancreatitis: Implications for More Innovative Nutrition Therapy. Nutr Clin Pract 2019; 34 Suppl 1:S43-S48. [DOI: 10.1002/ncp.10371] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Stephen A. McClave
- Department of Medicine; University of Louisville School of Medicine; Louisville Kentucky USA
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22
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Panebianco C, Pazienza V. Body site-dependent variations of microbiota in pancreatic cancer pathophysiology. Crit Rev Clin Lab Sci 2019; 56:260-273. [PMID: 31060399 DOI: 10.1080/10408363.2019.1615407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Lack of specific symptoms and reliable biomarkers, along with aggressive nature and resistance to therapies makes pancreatic cancer (PC) one of the leading causes of death from cancer worldwide. The search for new diagnostic, prognostic, predictive, and therapeutic tools that could improve clinical outcomes of patients has led, in recent years, to the investigation of potential roles for the microbiota in the pathogenesis of this disease. The human microbiota encompasses trillions of microorganisms residing within several body tissues and organs, where they provide beneficial functions for host homeostasis and health. Derangements of the microbial ecology in different anatomic districts have been described in PC, as in many other diseases, both in patients and in animal models. In detail, infection from the gastric pathogen Helicobacter pylori and changes in composition and diversity of oral, intestinal, and pancreatic microbiota have been found to associate with PC. Future research should assess how to potentially exploit such differences in microbiota composition as diagnostic, prognostic, or predictive biomarkers, and as targets for therapeutic interventions, in the hope of improving the dismal prognosis of this insidious cancer.
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Affiliation(s)
- Concetta Panebianco
- a Division of Gastroenterology , Fondazione IRCCS Casa Sollievo della Sofferenza , San Giovanni Rotondo , Italy
| | - Valerio Pazienza
- a Division of Gastroenterology , Fondazione IRCCS Casa Sollievo della Sofferenza , San Giovanni Rotondo , Italy
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23
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Pothuraju R, Rachagani S, Junker WM, Chaudhary S, Saraswathi V, Kaur S, Batra SK. Pancreatic cancer associated with obesity and diabetes: an alternative approach for its targeting. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2018; 37:319. [PMID: 30567565 PMCID: PMC6299603 DOI: 10.1186/s13046-018-0963-4] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 11/14/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND Pancreatic cancer (PC) is among foremost causes of cancer related deaths worldwide due to generic symptoms, lack of effective screening strategies and resistance to chemo- and radiotherapies. The risk factors associated with PC include several metabolic disorders such as obesity, insulin resistance and type 2 diabetes mellitus (T2DM). Studies have shown that obesity and T2DM are associated with PC pathogenesis; however, their role in PC initiation and development remains obscure. MAIN BODY Several biochemical and physiological factors associated with obesity and/or T2DM including adipokines, inflammatory mediators, and altered microbiome are involved in PC progression and metastasis albeit by different molecular mechanisms. Deep understanding of these factors and causal relationship between factors and altered signaling pathways will facilitate deconvolution of disease complexity as well as lead to development of novel therapies. In the present review, we focuses on the interplay between adipocytokines, gut microbiota, adrenomedullin, hyaluronan, vanin and matrix metalloproteinase affected by metabolic alteration and pancreatic tumor progression. CONCLUSIONS Metabolic diseases, such as obesity and T2DM, contribute PC development through altered metabolic pathways. Delineating key players in oncogenic development in pancreas due to metabolic disorder could be a beneficial strategy to combat cancers associated with metabolic diseases in particular, PC.
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Affiliation(s)
- Ramesh Pothuraju
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Satyanarayana Rachagani
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Wade M Junker
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA.,Sanguine Diagnostics and Therapeutics, University of Nebraska Medical Center, Omaha, NE, USA
| | - Sanjib Chaudhary
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Viswanathan Saraswathi
- Department of Cellular & Integrative Physiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Sukhwinder Kaur
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Surinder K Batra
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA. .,Fred & Pamela Buffet Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA. .,Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA.
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24
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Ballet C, Correia MSP, Conway LP, Locher TL, Lehmann LC, Garg N, Vujasinovic M, Deindl S, Löhr JM, Globisch D. New enzymatic and mass spectrometric methodology for the selective investigation of gut microbiota-derived metabolites. Chem Sci 2018; 9:6233-6239. [PMID: 30090311 PMCID: PMC6063053 DOI: 10.1039/c8sc01502c] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/27/2018] [Indexed: 12/18/2022] Open
Abstract
Gut microbiota significantly impact human physiology through metabolic interaction. Selective investigation of the co-metabolism of bacteria and their human host is a challenging task and methods for their analysis are limited. One class of metabolites associated with this co-metabolism are O-sulfated compounds. Herein, we describe the development of a new enzymatic assay for the selective mass spectrometric investigation of this phase II modification class. Analysis of human urine and fecal samples resulted in the detection of 206 sulfated metabolites, which is three times more than reported in the Human Metabolome Database. We confirmed the chemical structure of 36 sulfated metabolites including unknown and commonly reported microbiota-derived sulfated metabolites using synthesized internal standards and mass spectrometric fragmentation experiments. Our findings demonstrate that enzymatic sample pre-treatment combined with state-of-the-art metabolomics analysis represents a new and efficient strategy for the discovery of unknown microbiota-derived metabolites in human samples. Our described approach can be adapted for the targeted investigation of other metabolite classes as well as the discovery of biomarkers for diseases affected by microbiota.
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Affiliation(s)
- Caroline Ballet
- Department of Medicinal Chemistry , Science for Life Laboratory , Uppsala University , Box 574 , SE-75123 Uppsala , Sweden .
| | - Mário S P Correia
- Department of Medicinal Chemistry , Science for Life Laboratory , Uppsala University , Box 574 , SE-75123 Uppsala , Sweden .
| | - Louis P Conway
- Department of Medicinal Chemistry , Science for Life Laboratory , Uppsala University , Box 574 , SE-75123 Uppsala , Sweden .
| | - Theresa L Locher
- Department of Medicinal Chemistry , Science for Life Laboratory , Uppsala University , Box 574 , SE-75123 Uppsala , Sweden .
| | - Laura C Lehmann
- Department of Cell and Molecular Biology , Science for Life Laboratory , Uppsala University , Box 596 , SE-75124 Uppsala , Sweden
| | - Neeraj Garg
- Department of Medicinal Chemistry , Science for Life Laboratory , Uppsala University , Box 574 , SE-75123 Uppsala , Sweden .
| | - Miroslav Vujasinovic
- Department for Digestive Diseases , Karolinska University Hospital , Stockholm , Sweden
| | - Sebastian Deindl
- Department of Cell and Molecular Biology , Science for Life Laboratory , Uppsala University , Box 596 , SE-75124 Uppsala , Sweden
| | - J-Matthias Löhr
- Department for Digestive Diseases , Karolinska University Hospital , Stockholm , Sweden
- Department of Clinical Science , Intervention and Technology (CLINTEC) , Karolinska Institute , Stockholm , Sweden
| | - Daniel Globisch
- Department of Medicinal Chemistry , Science for Life Laboratory , Uppsala University , Box 574 , SE-75123 Uppsala , Sweden .
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25
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Geerlings SY, Kostopoulos I, de Vos WM, Belzer C. Akkermansia muciniphila in the Human Gastrointestinal Tract: When, Where, and How? Microorganisms 2018; 6:microorganisms6030075. [PMID: 30041463 PMCID: PMC6163243 DOI: 10.3390/microorganisms6030075] [Citation(s) in RCA: 256] [Impact Index Per Article: 42.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/03/2018] [Accepted: 07/12/2018] [Indexed: 02/06/2023] Open
Abstract
Akkermansia muciniphila is a mucin-degrading bacterium of the phylum Verrucomicrobia. Its abundance in the human intestinal tract is inversely correlated to several disease states. A. muciniphila resides in the mucus layer of the large intestine, where it is involved in maintaining intestinal integrity. We explore the presence of Akkermansia-like spp. based on its 16S rRNA sequence and metagenomic signatures in the human body so as to understand its colonization pattern in time and space. A. muciniphila signatures were detected in colonic samples as early as a few weeks after birth and likely could be maintained throughout life. The sites where Akkermansia-like sequences (including Verrucomicrobia phylum and/or Akkermansia spp. sequences found in the literature) were detected apart from the colon included human milk, the oral cavity, the pancreas, the biliary system, the small intestine, and the appendix. The function of Akkermansia-like spp. in these sites may differ from that in the mucosal layer of the colon. A. muciniphila present in the appendix or in human milk could play a role in the re-colonization of the colon or breast-fed infants, respectively. In conclusion, even though A. muciniphila is most abundantly present in the colon, the presence of Akkermansia-like spp. along the digestive tract indicates that this bacterium might have more functions than those currently known.
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Affiliation(s)
- Sharon Y Geerlings
- Laboratory of Microbiology, Wageningen University and Research, Stippeneng 4, 6708WE Wageningen, The Netherlands.
| | - Ioannis Kostopoulos
- Laboratory of Microbiology, Wageningen University and Research, Stippeneng 4, 6708WE Wageningen, The Netherlands.
| | - Willem M de Vos
- Laboratory of Microbiology, Wageningen University and Research, Stippeneng 4, 6708WE Wageningen, The Netherlands.
- Immunobiology Research Program, Department of Bacteriology and Immunology, Haartman Institute, University of Helsinki, 00014 Helsinki, Finland.
| | - Clara Belzer
- Laboratory of Microbiology, Wageningen University and Research, Stippeneng 4, 6708WE Wageningen, The Netherlands.
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Panebianco C, Adamberg K, Jaagura M, Copetti M, Fontana A, Adamberg S, Kolk K, Vilu R, Andriulli A, Pazienza V. Influence of gemcitabine chemotherapy on the microbiota of pancreatic cancer xenografted mice. Cancer Chemother Pharmacol 2018; 81:773-782. [DOI: 10.1007/s00280-018-3549-0] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 02/20/2018] [Indexed: 12/11/2022]
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Gut Microbiota-Immune System Crosstalk and Pancreatic Disorders. Mediators Inflamm 2018; 2018:7946431. [PMID: 29563853 PMCID: PMC5833470 DOI: 10.1155/2018/7946431] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 12/05/2017] [Accepted: 12/18/2017] [Indexed: 12/15/2022] Open
Abstract
Gut microbiota is key to the development and modulation of the mucosal immune system. It plays a central role in several physiological functions, in the modulation of inflammatory signaling and in the protection against infections. In healthy states, there is a perfect balance between commensal and pathogens, and microbiota and the immune system interact to maintain gut homeostasis. The alteration of such balance, called dysbiosis, determines an intestinal bacterial overgrowth which leads to the disruption of the intestinal barrier with systemic translocation of pathogens. The pancreas does not possess its own microbiota, and it is believed that inflammatory and neoplastic processes affecting the gland may be linked to intestinal dysbiosis. Increasing research evidence testifies a correlation between intestinal dysbiosis and various pancreatic disorders, but it remains unclear whether dysbiosis is the cause or an effect. The analysis of specific alterations in the microbiome profile may permit to develop novel tools for the early detection of several pancreatic disorders, utilizing samples, such as blood, saliva, and stools. Future studies will have to elucidate the mechanisms by which gut microbiota is modulated and how it tunes the immune system, in order to be able to develop innovative treatment strategies for pancreatic disorders.
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Gajdács M, Spengler G, Urbán E. Identification and Antimicrobial Susceptibility Testing of Anaerobic Bacteria: Rubik's Cube of Clinical Microbiology? Antibiotics (Basel) 2017; 6:E25. [PMID: 29112122 PMCID: PMC5745468 DOI: 10.3390/antibiotics6040025] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 10/30/2017] [Accepted: 11/03/2017] [Indexed: 12/26/2022] Open
Abstract
Anaerobic bacteria have pivotal roles in the microbiota of humans and they are significant infectious agents involved in many pathological processes, both in immunocompetent and immunocompromised individuals. Their isolation, cultivation and correct identification differs significantly from the workup of aerobic species, although the use of new technologies (e.g., matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, whole genome sequencing) changed anaerobic diagnostics dramatically. In the past, antimicrobial susceptibility of these microorganisms showed predictable patterns and empirical therapy could be safely administered but recently a steady and clear increase in the resistance for several important drugs (β-lactams, clindamycin) has been observed worldwide. For this reason, antimicrobial susceptibility testing of anaerobic isolates for surveillance purposes or otherwise is of paramount importance but the availability of these testing methods is usually limited. In this present review, our aim was to give an overview of the methods currently available for the identification (using phenotypic characteristics, biochemical testing, gas-liquid chromatography, MALDI-TOF MS and WGS) and antimicrobial susceptibility testing (agar dilution, broth microdilution, disk diffusion, gradient tests, automated systems, phenotypic and molecular resistance detection techniques) of anaerobes, when should these methods be used and what are the recent developments in resistance patterns of anaerobic bacteria.
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Affiliation(s)
- Márió Gajdács
- Department of Medical Microbiology and Immunobiology, Faculty of Medicine, University of Szeged, 6720 Szeged, Hungary.
| | - Gabriella Spengler
- Department of Medical Microbiology and Immunobiology, Faculty of Medicine, University of Szeged, 6720 Szeged, Hungary.
| | - Edit Urbán
- Institute of Clinical Microbiology, Faculty of Medicine, University of Szeged, 6725 Szeged, Hungary.
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Cell-Surface and Nuclear Receptors in the Colon as Targets for Bacterial Metabolites and Its Relevance to Colon Health. Nutrients 2017; 9:nu9080856. [PMID: 28796169 PMCID: PMC5579649 DOI: 10.3390/nu9080856] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 07/31/2017] [Accepted: 08/05/2017] [Indexed: 02/07/2023] Open
Abstract
The symbiotic co-habitation of bacteria in the host colon is mutually beneficial to both partners. While the host provides the place and food for the bacteria to colonize and live, the bacteria in turn help the host in energy and nutritional homeostasis, development and maturation of the mucosal immune system, and protection against inflammation and carcinogenesis. In this review, we highlight the molecular mediators of the effective communication between the bacteria and the host, focusing on selective metabolites from the bacteria that serve as messengers to the host by acting through selective receptors in the host colon. These bacterial metabolites include the short-chain fatty acids acetate, propionate, and butyrate, the tryptophan degradation products indole-3-aldehyde, indole-3-acetic, acid and indole-3-propionic acid, and derivatives of endogenous bile acids. The targets for these bacterial products in the host include the cell-surface G-protein-coupled receptors GPR41, GPR43, and GPR109A and the nuclear receptors aryl hydrocarbon receptor (AhR), pregnane X receptor (PXR), and farnesoid X receptor (FXR). The chemical communication between these bacterial metabolite messengers and the host targets collectively has the ability to impact metabolism, gene expression, and epigenetics in colonic epithelial cells as well as in mucosal immune cells. The end result, for the most part, is the maintenance of optimal colonic health.
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Engineered Resistant-Starch (ERS) Diet Shapes Colon Microbiota Profile in Parallel with the Retardation of Tumor Growth in In Vitro and In Vivo Pancreatic Cancer Models. Nutrients 2017; 9:nu9040331. [PMID: 28346394 PMCID: PMC5409670 DOI: 10.3390/nu9040331] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 03/21/2017] [Accepted: 03/23/2017] [Indexed: 12/15/2022] Open
Abstract
Background/aims: Pancreatic cancer (PC) is ranked as the fourth leading cause of cancer-related deaths worldwide. Despite recent advances in treatment options, a modest impact on the outcome of the disease is observed so far. We have previously demonstrated that short-term fasting cycles have the potential to improve the efficacy of chemotherapy against PC. The aim of this study was to assess the effect of an engineered resistant-starch (ERS) mimicking diet on the growth of cancer cell lines in vitro, on the composition of fecal microbiota, and on tumor growth in an in vivo pancreatic cancer mouse xenograft model. Materials and Methods: BxPC-3, MIA PaCa-2 and PANC-1 cells were cultured in the control, and in the ERS-mimicking diet culturing condition, to evaluate tumor growth and proliferation pathways. Pancreatic cancer xenograft mice were subjected to an ERS diet to assess tumor volume and weight as compared to mice fed with a control diet. The composition and activity of fecal microbiota were further analyzed in growth experiments by isothermal microcalorimetry. Results: Pancreatic cancer cells cultured in an ERS diet-mimicking medium showed decreased levels of phospho-ERK1/2 (extracellular signal-regulated kinase proteins) and phospho-mTOR (mammalian target of rapamycin) levels, as compared to those cultured in standard medium. Consistently, xenograft pancreatic cancer mice subjected to an ERS diet displayed significant retardation in tumor growth. In in vitro growth experiments, the fecal microbial cultures from mice fed with an ERS diet showed enhanced growth on residual substrates, higher production of formate and lactate, and decreased amounts of propionate, compared to fecal microbiota from mice fed with the control diet. Conclusion: A positive effect of the ERS diet on composition and metabolism of mouse fecal microbiota shown in vitro is associated with the decrease of tumor progression in the in vivo PC xenograft mouse model. These results suggest that engineered dietary interventions could be supportive as a synergistic approach to enhance the efficacy of existing cancer treatments in pancreatic cancer patients.
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Ahuja M, Schwartz DM, Tandon M, Son A, Zeng M, Swaim W, Eckhaus M, Hoffman V, Cui Y, Xiao B, Worley PF, Muallem S. Orai1-Mediated Antimicrobial Secretion from Pancreatic Acini Shapes the Gut Microbiome and Regulates Gut Innate Immunity. Cell Metab 2017; 25:635-646. [PMID: 28273482 PMCID: PMC5345693 DOI: 10.1016/j.cmet.2017.02.007] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 12/06/2016] [Accepted: 02/12/2017] [Indexed: 02/07/2023]
Abstract
The gut microbiome participates in numerous physiologic functions and communicates intimately with the host immune system. Antimicrobial peptides are critical components of intestinal innate immunity. We report a prominent role for antimicrobials secreted by pancreatic acini in shaping the gut microbiome that is essential for intestinal innate immunity, barrier function, and survival. Deletion of the Ca2+ channel Orai1 in pancreatic acini of adult mice resulted in 60%-70% mortality within 3 weeks. Despite robust activation of the intestinal innate immune response, mice lacking acinar Orai1 exhibited intestinal bacterial outgrowth and dysbiosis, ultimately causing systemic translocation, inflammation, and death. While digestive enzyme supplementation was ineffective, treatments constraining bacterial outgrowth (purified liquid diet, broad-spectrum antibiotics) rescued survival, feeding, and weight gain. Pancreatic levels of cathelicidin-related antimicrobial peptide (CRAMP) were reduced, and supplement of synthetic CRAMP prevented intestinal disease. These findings reveal a critical role for antimicrobial pancreatic secretion in gut innate immunity.
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Affiliation(s)
- Malini Ahuja
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
| | - Daniella M Schwartz
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Mayank Tandon
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
| | - Aran Son
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
| | - Mei Zeng
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
| | - William Swaim
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
| | - Michael Eckhaus
- Office of Research Services, National Institutes of Health, Bethesda, MD 20892, USA
| | - Victoria Hoffman
- Office of Research Services, National Institutes of Health, Bethesda, MD 20892, USA
| | - Yiyuan Cui
- Department of Neuroscience, Sichuan University, Chengdu 610041, China
| | - Bo Xiao
- Department of Neuroscience, Sichuan University, Chengdu 610041, China
| | - Paul F Worley
- Department of Neuroscience, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Shmuel Muallem
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA.
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