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Banakar M, Etemad-Moghadam S, Haghgoo R, Mehran M, Yazdi MH, Mohamadpour H, Iravani Saadi M, Alaeddini M. Anticancer Activity of Postbiotic Mediators Derived from Lactobacillus Rhamnosus GG and Lactobacillus Reuteri on Acute Lymphoblastic Leukemia Cells. Galen Med J 2023; 12:1-9. [PMID: 38774842 PMCID: PMC11108661 DOI: 10.31661/gmj.v12i.3096] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Indexed: 05/24/2024] Open
Abstract
BACKGROUND Leukemia remains a global health challenge, requiring the exploration of alternative therapies with reduced side effects. Probiotics, particularly Lactobacillus species, have gained attention because of their potential anticancer properties. This study investigated the anticancer and cytotoxic effects of postbiotic mediators (PMs) derived from Lactobacillus rhamnosus GG (LGG) and Lactobacillus reuteri (LR) on acute lymphoblastic leukemia (ALL) cells and peripheral blood mononuclear cells (PBMCs). MATERIALS AND METHODS The PMs were prepared by culturing LGG and LR strains and isolating the supernatant. The MTT assay assessed cell viability on ALL Jurkat cells and PBMCs, and apoptosis analysis was conducted using flow cytometry. Quantitative real-time PCR was also performed to analyze BAX, BCL-2, BCLX, FAS, and p27 gene expression levels. RESULTS The results showed that PMs derived from LGG and LR significantly reduced cell viability in Jurkat cells (P0.05) but not PBMCs (P0.05). Apoptosis analysis revealed an increase in apoptotic cells after PMs treatment. Nevertheless, gene expression analysis revealed no statistically significant difference between the treated and untreated groups in BAX, BCL-2, BCLX, FAS, and p27 gene expression levels (P0.05). CONCLUSION Findings suggest that specific PMs derived from LGG and LR possess anticancer properties against ALL cells. This research highlighted the promise of PMs as a cutting-edge and less toxic adjuvant therapeutic strategy in cancer treatment.
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Affiliation(s)
- Morteza Banakar
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical
Sciences, Tehran, Iran
- Department of Pediatric Dentistry, Faculty of Dentistry, Shahed University, Tehran,
Iran
| | - Shahroo Etemad-Moghadam
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical
Sciences, Tehran, Iran
| | - Roza Haghgoo
- Department of Pediatric Dentistry, Faculty of Dentistry, Shahed University, Tehran,
Iran
| | - Majid Mehran
- Department of Pediatric Dentistry, Faculty of Dentistry, Shahed University, Tehran,
Iran
| | | | - Hadiseh Mohamadpour
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical
Sciences, Tehran, Iran
| | | | - Mojgan Alaeddini
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical
Sciences, Tehran, Iran
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2
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van Lier YF, Vos J, Blom B, Hazenberg MD. Allogeneic hematopoietic cell transplantation, the microbiome, and graft-versus-host disease. Gut Microbes 2023; 15:2178805. [PMID: 36794370 PMCID: PMC9980553 DOI: 10.1080/19490976.2023.2178805] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Many patients with hematological malignancies, such as acute myeloid leukemia, receive an allogeneic hematopoietic cell transplantation (HCT) to cure their underlying condition. Allogeneic HCT recipients are exposed to various elements during the pre-, peri- and post-transplant period that can disrupt intestinal microbiota, including chemo- and radiotherapy, antibiotics, and dietary changes. The dysbiotic post-HCT microbiome is characterized by low fecal microbial diversity, loss of anaerobic commensals, and intestinal domination, particularly by Enterococcus species, and is associated with poor transplant outcomes. Graft-versus-host disease (GvHD) is a frequent complication of allogeneic HCT caused by immunologic disparity between donor and host cells and results in tissue damage and inflammation. Microbiota injury is particularly pronounced in allogeneic HCT recipients who go on to develop GvHD. At present, manipulation of the microbiome for example, via dietary interventions, antibiotic stewardship, prebiotics, probiotics, or fecal microbiota transplantation, is widely being explored to prevent or treat gastrointestinal GvHD. This review discusses current insights into the role of the microbiome in GvHD pathogenesis and summarizes interventions to prevent and treat microbiota injury.
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Affiliation(s)
- Yannouck F. van Lier
- Department of Hematology, Amsterdam UMC location AMC, Amsterdam, The Netherlands,Department of Experimental Immunology, Amsterdam Institute for Infection & Immunity Institute, Cancer Center Amsterdam, Amsterdam UMC location AMC, Amsterdam, The Netherlands
| | - Jaël Vos
- Department of Hematology, Amsterdam UMC location AMC, Amsterdam, The Netherlands,Department of Experimental Immunology, Amsterdam Institute for Infection & Immunity Institute, Cancer Center Amsterdam, Amsterdam UMC location AMC, Amsterdam, The Netherlands
| | - Bianca Blom
- Department of Experimental Immunology, Amsterdam Institute for Infection & Immunity Institute, Cancer Center Amsterdam, Amsterdam UMC location AMC, Amsterdam, The Netherlands
| | - Mette D. Hazenberg
- Department of Hematology, Amsterdam UMC location AMC, Amsterdam, The Netherlands,Department of Experimental Immunology, Amsterdam Institute for Infection & Immunity Institute, Cancer Center Amsterdam, Amsterdam UMC location AMC, Amsterdam, The Netherlands,Department of Hematopoiesis, Sanquin Research, Amsterdam, The Netherlands,CONTACT Mette D. Hazenberg Department of Hematology, Amsterdam UMC, Meibergdreef 9, Amsterdam1105 AZ, The Netherlands
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3
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Muratore E, Leardini D, Baccelli F, Venturelli F, Prete A, Masetti R. Nutritional modulation of the gut microbiome in allogeneic hematopoietic stem cell transplantation recipients. Front Nutr 2022; 9:993668. [PMID: 36337625 PMCID: PMC9632163 DOI: 10.3389/fnut.2022.993668] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 10/04/2022] [Indexed: 11/23/2022] Open
Abstract
Allogeneic hematopoietic stem cell transplantation (allo-HSCT) represents a potentially curative strategy for many oncological and non-oncological diseases, but it is associated with marked morbidity and mortality. The disruption of gut microbiota (GM) eubiosis has been linked to major allo-HSCT complications, including infections and acute graft vs. host disease (aGvHD), and correlates with mortality. This increasing knowledge on the role of the GM in the allo-HSCT procedure has led to fascinating ideas for modulating the intestinal ecosystem in order to improve clinical outcomes. Nutritional strategies, either by changing the route of nutritional supplementation or by administering specific molecules, are increasingly being considered as cost- and risk-effective methods of modulating the GM. Nutritional support has also emerged in the past several years as a key feature in supportive care for allo-HSCT recipients, and deterioration of nutritional status is associated with decreased overall survival and higher complication rates during treatment. Herein we provide a complete overview focused on nutritional modulation of the GM in allo-HSCT recipients. We address how pre transplant diet could affect GM composition and its ability to withstand the upsetting events occurring during transplantation. We also provide a complete overview on the influence of the route of nutritional administration on the intestinal ecosystem, with a particular focus on the comparison between enteral and parenteral nutrition (PN). Moreover, as mounting evidence are showing how specific components of post-transplant diet, such as lactose, could drastically shape the GM, we will also summarize the role of prebiotic supplementation in the modulation of the intestinal flora and in allo-HSCT outcomes.
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Affiliation(s)
- Edoardo Muratore
- Pediatric Oncology and Hematology “Lalla Seràgnoli,” IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Davide Leardini
- Pediatric Oncology and Hematology “Lalla Seràgnoli,” IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Francesco Baccelli
- Pediatric Oncology and Hematology “Lalla Seràgnoli,” IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
- *Correspondence: Francesco Baccelli,
| | - Francesco Venturelli
- Pediatric Oncology and Hematology “Lalla Seràgnoli,” IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, Bologna, Italy
| | - Arcangelo Prete
- Pediatric Oncology and Hematology “Lalla Seràgnoli,” IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Riccardo Masetti
- Pediatric Oncology and Hematology “Lalla Seràgnoli,” IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy
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Gill VJS, Soni S, Shringarpure M, . A, Bhardwaj S, Yadav NK, Patel A, Patel A. Gut Microbiota Interventions for the Management of Obesity: A Literature Review. Cureus 2022; 14:e29317. [PMID: 36161997 PMCID: PMC9484223 DOI: 10.7759/cureus.29317] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/19/2022] [Indexed: 11/16/2022] Open
Abstract
The gut microbiota (GM) has been recognized as an important factor in the development of metabolic diseases such as obesity; it has been reported that the composition of the GM differs in obese and lean subjects, suggesting that microbiota dysbiosis can contribute to changes in body weight. Dysbiosis occurs due to an imbalance in the composition of gut bacteria, changes in the metabolic process, or changes in the distribution of microbiota within the gut. Dysbiosis can change the functioning of the intestinal barrier and the gut-associated lymphoid tissues (GALT). Microbial manipulation may help with preventing or treating weight gain and associated comorbidities. Approaches to this may range from dietary manipulation, which is suitable to treat the individual’s microflora, to probiotics, prebiotics, synbiotics, and fecal microbiota transplant (FMT).
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5
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Bacteraemia Caused by Probiotic Strains of Lacticaseibacillus rhamnosus—Case Studies Highlighting the Need for Careful Thought before Using Microbes for Health Benefits. Pathogens 2022; 11:pathogens11090977. [PMID: 36145409 PMCID: PMC9504050 DOI: 10.3390/pathogens11090977] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/16/2022] [Accepted: 08/24/2022] [Indexed: 11/16/2022] Open
Abstract
Lactic acid bacteria belonging to Lactobacillus spp. and Lacticaseibacillus spp. are a natural part of fermented milk and other food products, probiotic supplements and human microbiota. They mainly belong to mucosal microflora, especially oral, vaginal and intestinal. Lacticaseibacillus spp. strains included in probiotics are generally characterised as safe microorganisms, and the species are concerned bacteria with very low pathogenic potential. However, infections caused by Lactobacillus spp. and Lacticaseibacillus spp., including bacteraemia and endocarditis, occur occasionally. The aim of the study was to present two cases of bacteraemia due to Lacticaseibacillus rhamnosus associated with the use of a probiotic product. It afflicted patients in intensive care units. The investigation was preliminarily based on clinical and microbiological recognition of the cases. The initial observation was laboratory confirmed with the application of pulsed-field gel electrophoresis (PFGE) results. Identical PFGE patterns were obtained for the evaluated strains and the strains derived from a commercially available probiotic that was administered to those patients. The increasing number of studies describing opportunistic infections due to probiotic strains of Lacticaseibacillus spp. should result in verifying the safety of probiotic formulations used in immunocompromised patients and forming detailed guidelines for the use of probiotics among patients from several risk groups.
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6
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Van Lier YF, Van den Brink MRM, Hazenberg MD, Markey KA. The post-hematopoietic cell transplantation microbiome: relationships with transplant outcome and potential therapeutic targets. Haematologica 2021; 106:2042-2053. [PMID: 33882637 PMCID: PMC8327718 DOI: 10.3324/haematol.2020.270835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Indexed: 01/16/2023] Open
Abstract
Microbiota injury occurs in many patients undergoing allogeneic hematopoietic cell transplantation, likely as a consequence of conditioning regimens involving chemo- and radiotherapy, the widespread use of both prophylactic and therapeutic antibiotics, and profound dietary changes during the peri-transplant period. Peri-transplant dysbiosis is characterized by a decrease in bacterial diversity, loss of commensal bacteria and single-taxon domination (e.g., with Enterococcal strains). Clinically, deviation of the post-transplant microbiota from a normal, high-diversity, healthy state has been associated with increased risk of bacteremia, development of graft-versus-host disease and decreases in overall survival. A number of recent clinical trials have attempted to target the microbiota in allogeneic hematopoietic cell transplantation patients via dietary interventions, selection of therapeutic antibiotics, administration of pre- or pro-biotics, or by performing fecal microbiota transplantation. These strategies have yielded promising results but the mechanisms by which these interventions influence transplant-related complications remain largely unknown. In this review we summarize the current approaches to targeting the microbiota, discuss potential underlying mechanisms and highlight the key outstanding areas that require further investigation in order to advance microbiota- targeting therapies.
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Affiliation(s)
- Yannouck F Van Lier
- Department of Hematology, Amsterdam UMC, Amsterdam, the Netherlands; Department of Experimental Immunology, Amsterdam Institute for Infection and Immunity (AII), Cancer Center Amsterdam, Amsterdam UMC, Amsterdam
| | - Marcel R M Van den Brink
- Adult Bone Marrow Transplantation Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA; Department of Medicine, Weill Cornell Medical College, New York, NY
| | - Mette D Hazenberg
- Department of Hematology, Amsterdam UMC, Amsterdam, the Netherlands; Department of Experimental Immunology, Amsterdam Institute for Infection and Immunity (AII), Cancer Center Amsterdam, Amsterdam UMC, Amsterdam, the Netherlands; Department of Hematopoiesis, Sanquin Research, Amsterdam
| | - Kate A Markey
- Adult Bone Marrow Transplantation Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA; Department of Medicine, Weill Cornell Medical College, New York, NY.
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7
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Tang Q, Hao Y, Wang L, Lu C, Li M, Si Z, Wu X, Lu Z. Characterization of a bacterial strain Lactobacillus paracasei LP10266 recovered from an endocarditis patient in Shandong, China. BMC Microbiol 2021; 21:183. [PMID: 34134621 PMCID: PMC8210379 DOI: 10.1186/s12866-021-02253-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 05/31/2021] [Indexed: 02/06/2023] Open
Abstract
Background Lactobacilli are often recognized as beneficial partners in human microbial environments. However, lactobacilli also cause diseases in human, e.g. infective endocarditis (IE), septicaemia, rheumatic vascular disease, and dental caries. Therefore, the identification of potential pathogenic traits associated with lactobacilli will facilitate the prevention and treatment of the diseases caused by lactobacilli. Herein, we investigated the genomic traits and pathogenic potential of a novel bacterial strain Lactobacillus paracasei LP10266 which has caused a case of IE. We isolated L. paracasei LP10266 from an IE patient’s blood to perform high-throughput sequencing and compared the genome of strain LP10266 with those of closely related lactobacilli to determine genes associated with its infectivity. We performed the antimicrobial susceptibility testing on strain LP10266. We assessed its virulence by mouse lethality and serum bactericidal assays as well as its serum complement- and platelet-activating ability. The biofilm formation and adherence of strain LP10266 were also studied. Results Phylogenetic analysis revealed that strain LP10266 was allied with L. casei and L. paracasei. Genomic studies revealed two spaCBA pilus clusters and one novel exopolysaccharides (EPS) cluster in strain LP10266, which was sensitive to ampicillin, penicillin, levofloxacin, and imipenem, but resistant to cefuroxime, cefazolin, cefotaxime, meropenem, and vancomycin. Strain LP10266 was nonfatal and sensitive to serum, capable of activating complement 3a and terminal complement complex C5b-9 (TCC). Strain LP10266 could not induce platelet aggregation but displayed a stronger biofilm formation ability and adherence to human vascular endothelial cells (HUVECs) compared to the standard control strain L. paracasei ATCC25302. Conclusion The genome of a novel bacterial strain L. paracasei LP10266 was sequenced. Our results based on various types of assays consistently revealed that L. paracasei LP10266 was a potential pathogen to patients with a history of cardiac disease and inguinal hernia repair. Strain LP10266 showed strong biofilm formation ability and adherence, enhancing the awareness of L. paracasei infections. Supplementary Information The online version contains supplementary material available at 10.1186/s12866-021-02253-8.
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Affiliation(s)
- Qi Tang
- Department of Clinical Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, Shandong, China
| | - Yingying Hao
- Department of Clinical Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, Shandong, China.,Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Lu Wang
- Department of Dermatology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, 266035, Shandong, China
| | - Chao Lu
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Ming Li
- Department of Clinical Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, Shandong, China
| | - Zaifeng Si
- Department of Clinical Laboratory, Dezhou Traditional Chinese Medicine Hospital, Dezhou, 253000, Shandong, China
| | - Xiaoben Wu
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China.
| | - Zhiming Lu
- Department of Clinical Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, Shandong, China. .,Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China.
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8
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Bakhsh ARA, Lewis KE. Unusual source of recurrent Corynebacterium bacteraemia in an immunocompromised patient. BMJ Case Rep 2021; 14:14/6/e242560. [PMID: 34116997 PMCID: PMC8201974 DOI: 10.1136/bcr-2021-242560] [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] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
We describe a unique case of a patient with acute myeloid leukaemia (AML), with recurring infections during chemotherapy from chronic nasal carriage of non-diphtherial Corynebacterium, who was eventually diagnosed as she presented with neutropaenic sepsis. Identifying (often multiple) sources of infection in immunocompromised patients is crucial but deciding whether multiple organisms, which in health are considered as commensals, are actually pathogenic during vulnerable states—can be clinically difficult. Our case highlights the efforts to correctly identify the actual source of this rare organism and the recognition of its pathogenic potential when other illnesses present. We also review the literature of Corynebacteria in patients with haematological malignancies but believe this is the first case of AML to be infected with Corynebacterium presenting during the COVID-19 pandemic with a probable incidental positive swab for SARS-CoV-2.
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9
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Lactobacillus gasseri liver abscess and bacteremia: a case report. BMC Infect Dis 2021; 21:518. [PMID: 34078320 PMCID: PMC8173985 DOI: 10.1186/s12879-021-06181-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 05/13/2021] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Lactobacillus is a genus of Gram-positive non-spore-forming rods usually found in the microbiota of the oral cavity, gastrointestinal tract, and female genitourinary tract. Also, they are commonly used in the food industry as supplements and probiotics. Lactobacilli are normally considered non-pathogenic to the human body, however, under certain circumstances such as immunosuppression, they can cause severe infections, with only a few cases of bacteremia, infective endocarditis, pneumonia, meningitis, and intra-abdominal infections reported. Among these presentations, a pyogenic liver abscess is rather rare. CASE PRESENTATION We describe the case of a 59-year-old man with a history of diabetes mellitus and multiple abdominal surgeries with the latest being in 2014 presenting with bacteremia and multiple large pyogenic liver abscesses due to Lactobacillus gasseri, which did not appear to be related to the use of probiotics or immunosuppression. CONCLUSIONS Given the high prevalence of diabetes mellitus and the increased use of probiotics, it is expected that in the future we will see an increase in infections caused by Lactobacilli. Medical management with antibiotics and percutaneous drainage were successful strategies for the treatment of this unusual case of pyogenic liver abscesses and bacteremia caused by Lactobacillus gasseri.
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Ahmad F, Farooq A, Khan MUG. Deep Learning Model for Pathogen Classification Using Feature Fusion and Data Augmentation. Curr Bioinform 2021. [DOI: 10.2174/1574893615999200707143535] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Bacterial pathogens are deadly for animals and humans. The ease of their dissemination, coupled
with their high capacity for ailment and death in infected individuals, makes them a threat to society.
Objective:
Due to high similarity among genera and species of pathogens, it is sometimes difficult for microbiologists to
differentiate between them. Their automatic classification using deep-learning models can help in reliable, and accurate
outcomes.
Method:
Deep-learning models, namely; AlexNet, GoogleNet, ResNet101, and InceptionV3 are used with numerous
variations including training model from scratch, fine-tuning without pre-trained weights, fine-tuning along with freezing
weights of initial layers, fine-tuning along with adjusting weights of all layers and augmenting the dataset by random
translation and reflection. Moreover, as the dataset is small, fine-tuning and data augmentation strategies are applied to
avoid overfitting and produce a generalized model. A merged feature vector is produced using two best-performing models
and accuracy is calculated by xgboost algorithm on the feature vector by applying cross-validation.
Results:
Fine-tuned models where augmentation is applied produces the best results. Out of these, two-best-performing
deep models i.e. (ResNet101, and InceptionV3) selected for feature fusion, produced a similar validation accuracy of 95.83
with a loss of 0.0213 and 0.1066, and a testing accuracy of 97.92 and 93.75, respectively. The proposed model used xgboost
to attained a classification accuracy of 98.17% by using 35-folds cross-validation.
Conclusion:
The automatic classification using these models can help experts in the correct identification of pathogens.
Consequently, they can help in controlling epidemics and thereby minimizing the socio-economic impact on the community.
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Affiliation(s)
- Fareed Ahmad
- Department of Computer Science and Engineering, Faculty of Electrical Engineering, University of Engineering and Technology, Lahore, Pakistan
| | - Amjad Farooq
- Department of Computer Science and Engineering, Faculty of Electrical Engineering, University of Engineering and Technology, Lahore, Pakistan
| | - Muhammad Usman Ghani Khan
- Department of Computer Science and Engineering, Faculty of Electrical Engineering, University of Engineering and Technology, Lahore, Pakistan
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Matsuura H, Kiura Y, Ito T, Fujita R, Kajitani S, Kageyama H, Suganami Y, Kishida M. Lactobacillus bacteremia: a diagnostic clue of rectal cancer. QJM 2021; 114:122-123. [PMID: 33165617 DOI: 10.1093/qjmed/hcaa311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Indexed: 11/12/2022] Open
Affiliation(s)
- H Matsuura
- Department of General Internal Medicine, 3-20-1, Omote-cho, Kitanagase, Okayama-city, Okayama 700-0962, Japan
| | - Y Kiura
- Department of General Internal Medicine, 3-20-1, Omote-cho, Kitanagase, Okayama-city, Okayama 700-0962, Japan
| | - T Ito
- Department of General Internal Medicine, 3-20-1, Omote-cho, Kitanagase, Okayama-city, Okayama 700-0962, Japan
| | - R Fujita
- Department of General Internal Medicine, 3-20-1, Omote-cho, Kitanagase, Okayama-city, Okayama 700-0962, Japan
- Gastroenterology, 3-20-1, Omote-cho, Kitanagase, Okayama-city, Okayama 700-0962, Japan
| | - S Kajitani
- Gastroenterology, 3-20-1, Omote-cho, Kitanagase, Okayama-city, Okayama 700-0962, Japan
| | - H Kageyama
- Gastroenterology, 3-20-1, Omote-cho, Kitanagase, Okayama-city, Okayama 700-0962, Japan
| | - Y Suganami
- Department of General Internal Medicine, 3-20-1, Omote-cho, Kitanagase, Okayama-city, Okayama 700-0962, Japan
| | - M Kishida
- Department of General Internal Medicine, 3-20-1, Omote-cho, Kitanagase, Okayama-city, Okayama 700-0962, Japan
- Endocrinology, 3-20-1, Omote-cho, Kitanagase, Okayama City Hospital, Okayama 700-0962, Japan
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12
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Bossù G, Di Sario R, Argentiero A, Esposito S. Antimicrobial Prophylaxis and Modifications of the Gut Microbiota in Children with Cancer. Antibiotics (Basel) 2021; 10:antibiotics10020152. [PMID: 33546312 PMCID: PMC7913491 DOI: 10.3390/antibiotics10020152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/27/2021] [Accepted: 01/29/2021] [Indexed: 12/12/2022] Open
Abstract
In children with cancer, chemotherapy can produce cytotoxic effects, resulting in immunosuppression and an augmented risk of febrile neutropenia and bloodstream infections. This has led to widespread use of antibiotic prophylaxis which, combined with intensive chemotherapy treatment, could have a long-term effect on the gastrointestinal microbiome. In this review, we aimed to analyze the current literature about the widespread use of antibiotic prophylaxis in children experiencing infectious complications induced by chemotherapy and its effects on the gut microbiome. Our review of the literature shows that antimicrobial prophylaxis in children with cancer is still a trending topic and, at the moment, there are not enough data to define universal guidelines. Children with cancer experience long and painful medical treatments and side effects, which are associated with great economic and social burdens, important psychological consequences, and dysbiosis induced by antibiotics and also by chemotherapy. Considering the importance of a healthy gut microbiota, studies are needed to understand the impact of dysbiosis in response to therapy in these children and to define how to modulate the microbiome to favor a positive therapeutic outcome.
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13
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Sendil S, Shrimanker I, Mansoora Q, Goldman J, Nookala VK. Lactobacillus rhamnosus Bacteremia in an Immunocompromised Renal Transplant Patient. Cureus 2020; 12:e6887. [PMID: 32190450 PMCID: PMC7058391 DOI: 10.7759/cureus.6887] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Conventionally, Lactobacillus species are considered as low virulence organisms and rarely cause infection in immunocompetent individuals. However, it might be an opportunistic infection source in immunocompromised patients and can cause invasive serious infections. To our knowledge, there are only a handful of cases in the literature reporting primary bloodstream infection caused by Lactobacilli spp. in transplant recipients. Here, we report a case of a kidney transplant recipient with Lactobacillus rhamnosus bacteremia.
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Affiliation(s)
- Selin Sendil
- Internal Medicine, University of Pittsburgh Medical Center Pinnacle, Harrisburg, USA
| | - Isha Shrimanker
- Internal Medicine, University of Pittsburgh Medical Center Pinnacle, Harrisburg, USA
| | - Qurat Mansoora
- Internal Medicine, University of Pittsburgh Medical Center Pinnacle, Harrisburg, USA
| | - John Goldman
- Internal Medicine: Infectious Disease, University of Pittsburgh Medical Center Pinnacle, Harrisburg, USA
| | - Vinod K Nookala
- Internal Medicine, University of Pittsburgh Medical Center Pinnacle, Harrisburg, USA
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Zama D, Bossù G, Leardini D, Muratore E, Biagi E, Prete A, Pession A, Masetti R. Insights into the role of intestinal microbiota in hematopoietic stem-cell transplantation. Ther Adv Hematol 2020; 11:2040620719896961. [PMID: 32010434 PMCID: PMC6974760 DOI: 10.1177/2040620719896961] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 11/20/2019] [Indexed: 12/11/2022] Open
Abstract
The gut microbiota (GM) is able to modulate the human immune system. The development of novel investigation methods has provided better characterization of the GM, increasing our knowledge of the role of GM in the context of hematopoietic stem-cell transplantation (HSCT). In particular, the GM influences the development of the major complications seen after HSCT, having an impact on overall survival. In fact, this evidence highlights the possible therapeutic implications of modulation of the GM during HSCT. Insights into the complex mechanisms and functions of the GM are essential for the rational design of these therapeutics. To date, preemptive and curative approaches have been tested. The current state of understanding of the impact of the GM on HSCT, and therapies targeting the GM balance is reviewed herein.
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Affiliation(s)
- Daniele Zama
- Pediatric Oncology and Hematology Unit ‘Lalla
Seràgnoli,’ Sant’Orsola-Malpighi Hospital, University of Bologna, Via
Massarenti 11, Bologna, 40137, Italy
| | - Gianluca Bossù
- Department of Pediatrics, ‘Lalla Seràgnoli,’
Hematology-Oncology Unit, University of Bologna, Italy
| | - Davide Leardini
- Department of Pediatrics, ‘Lalla Seràgnoli,’
Hematology-Oncology Unit, University of Bologna, Italy
| | - Edoardo Muratore
- Department of Pediatrics, ‘Lalla Seràgnoli,’
Hematology-Oncology Unit, University of Bologna, Italy
| | - Elena Biagi
- Department of Pharmacy and Biotechnology,
University of Bologna, Bologna, Italy
| | - Arcangelo Prete
- Department of Pediatrics, ‘Lalla Seràgnoli,’
Hematology-Oncology Unit, University of Bologna, Italy
| | - Andrea Pession
- Department of Pediatrics, ‘Lalla Seràgnoli,’
Hematology-Oncology Unit, University of Bologna, Italy
| | - Riccardo Masetti
- Department of Pediatrics, ‘Lalla Seràgnoli,’
Hematology-Oncology Unit, University of Bologna, Italy
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Abstract
Probiotic bacteria have been used as a health-promoting factor for a very long time. Nowadays, products containing probiotic bacteria are becoming more and more popular on the market. The term probiotics refers to the products belonging to the following groups: probiotic drugs (medicinal products – live biotherapeutic products for human use), medical devices, probiotic foods (e.g. foods, food ingredients, dietary supplements or food for special medical purposes), directly fed microorganisms (for animal use) and designer probiotics (genetically modified probiotics). Safety assessment of bacterial strains used as probiotics should be carefully studied. Even though probiotic bacteria have the generally recognized as safe (GRAS status), there are several reports about side effects triggered by the presence of these organisms. Microorganisms used as probiotics may cause systemic infections, stimulate the immune system, disturb metabolism and participate in horizontal gene transfer.
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Affiliation(s)
- Anna Zawistowska-Rojek
- Department of Antibiotics and Microbiology, National Medicines Institute, Warsaw, Poland ; Department of Pharmaceutical Microbiology, Medical University of Warsaw, Warsaw, Poland
| | - Stefan Tyski
- Department of Antibiotics and Microbiology, National Medicines Institute, Warsaw, Poland ; Department of Pharmaceutical Microbiology, Medical University of Warsaw, Warsaw, Poland
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Rossi F, Amadoro C, Colavita G. Members of the Lactobacillus Genus Complex (LGC) as Opportunistic Pathogens: A Review. Microorganisms 2019; 7:E126. [PMID: 31083452 PMCID: PMC6560513 DOI: 10.3390/microorganisms7050126] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 05/04/2019] [Accepted: 05/08/2019] [Indexed: 12/31/2022] Open
Abstract
Microorganisms belonging to the Lactobacillus genus complex (LGC) are naturally associated or deliberately added to fermented food products and are widely used as probiotic food supplements. Moreover, these bacteria normally colonize the mouth, gastrointestinal (GI) tract, and female genitourinary tract of humans. They exert multiple beneficial effects and are regarded as safe microorganisms. However, infections caused by lactobacilli, mainly endocarditis, bacteremia, and pleuropneumonia, occasionally occur. The relevance of Lactobacillus spp. and other members of the LGC as opportunistic pathogens in humans and related risk factors and predisposing conditions are illustrated in this review article with more emphasis on the species L. rhamnosus that has been more often involved in infection cases. The methods used to identify this species in clinical samples, to distinguish strains and to evaluate traits that can be associated to pathogenicity, as well as future perspectives for improving the identification of potentially pathogenic strains, are outlined.
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Affiliation(s)
- Franca Rossi
- Diagnostica Specialistica, Sezione di Isernia, Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise "G. Caporale", C.da Breccelle Snc, 86170 Isernia, Italy.
| | - Carmela Amadoro
- Medicine and Health Science Department "V. Tiberio", University of Molise, Via de Santis, 86100 Campobasso, Italy.
| | - Giampaolo Colavita
- Medicine and Health Science Department "V. Tiberio", University of Molise, Via de Santis, 86100 Campobasso, Italy.
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