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Table 1 Summary of intratumor bacteria in cancerous tissues and their roles in oncogenesis, progression, and prognosis in cancers

From: Intratumor microbiome in cancer progression: current developments, challenges and future trends

Genus

Status

Cancer

Samples

Role

Mechanism

Refs

Bacteria

Thermus and Ralstonia

Dysbiosis

Lung

Adenocarcinoma and squamous cell carcinoma

Cancer histology

NT

 

Legionella

Enriched

 

Primary and metastatic lung tumor tissues

Oncogenesis metastasis

NT

[37]

Acidovorax

Enriched

 

Lung cancer tissues with or without TP53 mutation

Linked with TP53 mutation

 

[38]

Staphylococcus

Decreased

 

Tissues from lung cancer patients with unilateral lobar masses and healthy controls

  

[39]

Anaerococcus, Caulobacter, Streptococcus, and Propionibacterium

Decreased

Breast

Tissues from Breast cancer patients, predisposed to breast cancer, and healthy controls

Negatively correlated with oncogenic immune features; positively associated with T-cell activation-related genes

 

[40]

Bacteroidetes and Firmicutes

Lower ratio

 

Benign and breast cancer

  

[41]

Fusobacterium nucleatum

Enriched

 

Benign and breast cancer

Poor prognosis

Oncogenesis and suppressed immune response

[42]

Bacteroides fragilis

Enriched

  

Cancer progression

BFT drives epithelial hyperplasia in the mammary gland

[43]

Lactobacillus fermentum

Enriched

Esophageal

Tissues from esophageal cancer patients and healthy controls

Cancer screen

NT

[44]

Campylobacter species

Enriched

 

Esophageal adenocarcinoma and control tissues

Prognosis

NT

[45]

F. nucleatum

Enriched

 

Esophageal cancer and normal tissues

Prognosis

NT

[46]

Bacteroidetes/Fusobacteria/Spirochaetes

Decreased

 

Esophageal cancer and normal tissues

 

NT

[47]

Actinobacteria

Enriched

 

Esophageal cancer and normal tissues

 

NT

[48]

P. gingivalis

Enriched

 

Esophageal tissues from ESCC patients and normal controls

Progression and prognosis

NT

[49]

Fusobacterium nucleatum

Enriched

 

Resected ESCC samples

Chemoresistance

NT

[50]

Fusobacterium and less Streptococcus

Dysbiosis

 

ESCC tumor tissues and normal tissues

Oncogenesis

NT

[51]

H. pylori

Enriched

Gastric

Gastric cancer and normal tissues

Oncogenesis

Promote p53 degradation and immune evasion

[52,53,54,55]

E.coli, butyrate-producing bacterium SM4/1, Oscillatoria

Enriched

Bladder

Tumor samples with muscle invasive bladder carcinoma (n = 400)

Poor prognosis

Positively correlates with EMT-associated genes

[56]

Staphylococcaceae

Enriched

Prostate

prostatic tumor, peritumor and nontumor tissues

Oncogenesis

 

[57]

Pseudomonas, Escherichia, Acinetobacter, Propionibacterium spp.

Enriched

 

frozen radical prostate samples from tumor and adjacent benign tissue

Oncogenesis

 

[58]

 

Enriched

 

Propionibacterium acnes spp

Prostate tissue inflammation

 

[59]

Proteobacteria

Enriched

 

Prostatic tumor tissues

Oncogenesis

 

[60]

Enterobacteriaceae Pseudomonadaceae

Enriched

Pancreatic

Pancreatic ductal adenocarcinoma tissues and normal human pancreas

Chemotherapy resistance

Metabolize chemotherapy drugs

[32]

Proteobacteria Bacteroidetes Firmicutes

Enriched

 

Pancreatic cancer and normal tissues

Tumor progression

Modulating M1 macrophage/Th1 differentiation, that affect CD8 + T cell function

[61]

Pseudoxanthomonas Streptomyces Saccharopolyspora Bacillus clausii

Enriched

 

pancreatic adenocarcinoma (PDAC) patients with short-term survival (STS, < 5 years) and long-term survival (LTS, > 5 years)

Prognosis

Elevated infiltration and activation of CD8 T cells

[62]

F. nucleatum

Enriched

Mouth

Oral squamous cell carcinoma and normal oral tissues

Predictor

Promotes EMT transition

[63]

Abundance of Firmicutes (especially Streptococcus) and Actinobacteria (especially Rothia)

Bacterial dysbiosis

 

Oral cancers and anatomically matched contralateral normal tissue

 

Promote oncogenesis and progression

[64]

Fusobacterium/Prevotella

Enriched

 

Oral squamous cell carcinoma tissues and adjacent non-tumor mucosa 5 cm distant

Oncogenesis

NT

[65]

Peptostreptococcus

Enriched

 

Tumor samples from patients with OSCC

Better prognosis

NT

[66]

F. nucleatum

Enriched

Colon

Colorectal cancer and paired normal tissues

Oncogenesis and progression

Activates β-catenin signaling; Lower density of CD3+ T cells; Recruits immuno-

suppressive cells; Inactivation of NK and T cells

[67,68,69,70,71,72,73]

Escherichia coli and Bacteroides fragilis

Enriched

 

Familial adenomatous polyposis samples and healthy controls

Promotes cancer initiation

that secrete oncotoxins

[34]

Fusobacterium

Enriched

 

Paired primary colorectal and metastatic tumors

Cancer metastasis

NT

[70]

Helicobacter spp

Enriched

Bile duct

Bile duct cancer tissues

Oncogenesis

NT

[74]

Fusobacterium nucleatum, Escherichia coli, and Enterobacter sp.

Enriched

Gallbladder

Bile samples from patients with gallbladder cancer and cholelithiasis

Oncogenesis

NT

[75]

Decreased Nesterenkonia, and increased Methylophilaceae, Fusobacterium, Prevotella, Actinomyces, Novosphingobium, and H. pylori

Bacteria dysbiosis

Extrahepatic cholangiocarcinoma

Tissues from extrahepatic cholangiocarcinoma (ECCA) and benign biliary pathology (BBP) cohorts

Oncogenesis

NT

[76]

Helicobacter bilis

Enriched

Extrahepatic cholangiocarcinoma

Tissues from extrahepatic cholangiocarcinoma (ECCA) and benign biliary pathology (BBP) cohorts

Oncogenesis

NT

[77]

Bifidobacteriaceae Enterobacteriaceae Enterococcaceae

Enriched

Cholangiocarcinoma

primary CCA tumors and matched normal tissues

Oncogenesis

NT

[78]

Helicobacter species

Enriched

Hepatocellular carcinoma

Liver samples from patients with hepatocellular carcinoma, non-cirrhotic chronic hepatitis C, and healthy controls

Oncogenesis

NT

[79]

Sneathia and Lactobacillus

Dysbiosis

Cervix

   

[80]

Fusobacterium spp

Enriched

 

Samples from patients with squamous intraepithelial lesions (SIL) and cervical cancer

Oncogenesis

NT

[81]

L. gasseri

Enriched

  

Oncogenesis

NT

[82]

Atopobium, Porphyromonas, Dialister, Peptoniphilus, Ruminococcus, Anaerotruncus, Anaerostipes, Treponema, Bacteroides and Arthrospira

Enriched

Endometrium

Uterine samples from cancer and benign disease

Oncogenesis

Modulating the vaginal pH

[83]

Brucella, Mycoplasma, Chlamydia spp.

Enriched

Ovary

Ovarian tumor

Oncogenesis

 

[84]

Proteobacteria

Enriched

 

Ovarian cancer tissues and normal distal fallopian tube tissues

Cancer initiation and progression

Modulating immune response

[85]

Actinomyces and Parvimonas

Dysbiosis

Head and neck squamous cell carcinomas (OSCC)

Paired normal and tumor resected OSCC specimens

Tumor stage

NT

[86]