| Records |
| Author |
Ramirez-Blanco, C.E.; Ramirez-Rivero, C.E.; Diaz-Martinez, L.A.; Sosa-Avila, L.M. |
| Title |
Infection in burn patients in a referral center in Colombia |
Type |
Journal Article |
| Year |
2017 |
Publication |
Burns : Journal of the International Society for Burn Injuries |
Abbreviated Journal |
Burns |
Volume  |
43 |
Issue |
3 |
Pages |
642-653 |
| Keywords |
Acinetobacter Infections/drug therapy/epidemiology/microbiology; Acinetobacter baumannii; Adolescent; Adult; Aged; Aged, 80 and over; Anti-Bacterial Agents/therapeutic use; Bacteremia/drug therapy/*epidemiology/microbiology; Burns/*epidemiology; Catheter-Related Infections/drug therapy/*epidemiology/microbiology; Central Venous Catheters; Cephalosporins/therapeutic use; Child; Child, Preschool; Colombia/epidemiology; Drug Resistance, Microbial; Escherichia coli; Escherichia coli Infections/drug therapy/epidemiology/microbiology; Female; Folliculitis/drug therapy/*epidemiology/microbiology; Humans; Infant; Infant, Newborn; Klebsiella Infections/drug therapy/epidemiology/microbiology; Klebsiella pneumoniae; Male; Middle Aged; Oxacillin/therapeutic use; Pneumonia/drug therapy/*epidemiology/microbiology; Pseudomonas Infections/drug therapy/epidemiology/microbiology; Pseudomonas aeruginosa; Staphylococcal Infections/drug therapy/epidemiology/microbiology; Staphylococcus aureus; Urinary Tract Infections/drug therapy/*epidemiology/microbiology; Wound Infection/drug therapy/*epidemiology/microbiology; Young Adult; Burn wound infection; Burns; Health care related infection; Nosocomial infection; Pneumonia; Urinary tract infection |
| Abstract |
INTRODUCTION: Worldwide, burns are responsible for more than 300,000 deaths annually; infection is a major cause of morbidity and mortality in these patients. Early identification and treatment of infection improves outcome. Toward this end it's necessary to identify the institutions flora and organisms that most frequently produces infection. OBJECTIVES: To characterize infections developed by burn patients hospitalized at the University Hospital of Santander (HUS). METHODOLOGY: Burn patients hospitalized in the HUS from January 1 to December 2014 were followed. Medical information regarding infections, laboratory and pathology reports were obtained. Statistical analysis with measures of central tendency, proportions, global and specific incidence density plus overall and specific incidence was obtained. For the microbiological profile proportions were established. RESULTS: 402 burn patients were included, 234 (58.2%) men and 168 (41.8%) women, aged between 6 days and 83 years, median 12.5 years. The burn agents include scald (52.5%), fire (10.0%), gasoline (9.2%), electricity (7.5%), among others. Burn area ranged from 1% to 80% TBS. Cumulative mortality was 1.5%. 27.8% of burned patients had one or more infections. Identified infections include folliculitis (27.0%), urinary tract infection (19.0%), infection of the burn wound (10.4%), pneumonia (8.6%), Central venous catheter (7.4%), bloodstream infection (7.4%) and skin grafts infection (4.3%) among others. Bacteria were responsible for 88.5% of the cases and fungi 11.5%. The most frequently isolated germs were P. aeruginosa, A. baumannii, E. coli, S. aureus and K. pneumoniae. Most gram-negative bacteria were sensitive to Amikacin, gram positive bacteria were sensitive to multiple antibiotics. CONCLUSION: Burns is a severe trauma that occurs in adult and pediatric patients, has several causative agents and can compromise the patient's life. The burned patient is at risk for a variety of infections. According to the type of infection it is possible to infer the most common causative organisms and their antibiotic sensitivity/resistance which allow a directed early empiric treatment. |
| Address |
University Hospital of Santander, Universidad Industrial de Santander, Colombia. Electronic address: lumisosa@gmail.com |
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0305-4179 |
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PMID:28185802 |
Approved |
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ref @ user @ |
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99267 |
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| Author |
Ramirez-Blanco, C.E.; Ramirez-Rivero, C.E.; Diaz-Martinez, L.A.; Sosa-Avila, L.M. |
| Title |
Infection in burn patients in a referral center in Colombia |
Type |
Journal Article |
| Year |
2017 |
Publication |
Burns : Journal of the International Society for Burn Injuries |
Abbreviated Journal |
Burns |
| Volume |
43 |
Issue |
3 |
Pages |
642-653 |
| Keywords |
Acinetobacter Infections/drug therapy/epidemiology/microbiology; Acinetobacter baumannii; Adolescent; Adult; Aged; Aged, 80 and over; Anti-Bacterial Agents/therapeutic use; Bacteremia/drug therapy/*epidemiology/microbiology; Burns/*epidemiology; Catheter-Related Infections/drug therapy/*epidemiology/microbiology; Central Venous Catheters; Cephalosporins/therapeutic use; Child; Child, Preschool; Colombia/epidemiology; Drug Resistance, Microbial; Escherichia coli; Escherichia coli Infections/drug therapy/epidemiology/microbiology; Female; Folliculitis/drug therapy/*epidemiology/microbiology; Humans; Infant; Infant, Newborn; Klebsiella Infections/drug therapy/epidemiology/microbiology; Klebsiella pneumoniae; Male; Middle Aged; Oxacillin/therapeutic use; Pneumonia/drug therapy/*epidemiology/microbiology; Pseudomonas Infections/drug therapy/epidemiology/microbiology; Pseudomonas aeruginosa; Staphylococcal Infections/drug therapy/epidemiology/microbiology; Staphylococcus aureus; Urinary Tract Infections/drug therapy/*epidemiology/microbiology; Wound Infection/drug therapy/*epidemiology/microbiology; Young Adult; Burn wound infection; Burns; Health care related infection; Nosocomial infection; Pneumonia; Urinary tract infection |
| Abstract |
INTRODUCTION: Worldwide, burns are responsible for more than 300,000 deaths annually; infection is a major cause of morbidity and mortality in these patients. Early identification and treatment of infection improves outcome. Toward this end it's necessary to identify the institutions flora and organisms that most frequently produces infection. OBJECTIVES: To characterize infections developed by burn patients hospitalized at the University Hospital of Santander (HUS). METHODOLOGY: Burn patients hospitalized in the HUS from January 1 to December 2014 were followed. Medical information regarding infections, laboratory and pathology reports were obtained. Statistical analysis with measures of central tendency, proportions, global and specific incidence density plus overall and specific incidence was obtained. For the microbiological profile proportions were established. RESULTS: 402 burn patients were included, 234 (58.2%) men and 168 (41.8%) women, aged between 6 days and 83 years, median 12.5 years. The burn agents include scald (52.5%), fire (10.0%), gasoline (9.2%), electricity (7.5%), among others. Burn area ranged from 1% to 80% TBS. Cumulative mortality was 1.5%. 27.8% of burned patients had one or more infections. Identified infections include folliculitis (27.0%), urinary tract infection (19.0%), infection of the burn wound (10.4%), pneumonia (8.6%), Central venous catheter (7.4%), bloodstream infection (7.4%) and skin grafts infection (4.3%) among others. Bacteria were responsible for 88.5% of the cases and fungi 11.5%. The most frequently isolated germs were P. aeruginosa, A. baumannii, E. coli, S. aureus and K. pneumoniae. Most gram-negative bacteria were sensitive to Amikacin, gram positive bacteria were sensitive to multiple antibiotics. CONCLUSION: Burns is a severe trauma that occurs in adult and pediatric patients, has several causative agents and can compromise the patient's life. The burned patient is at risk for a variety of infections. According to the type of infection it is possible to infer the most common causative organisms and their antibiotic sensitivity/resistance which allow a directed early empiric treatment. |
| Address |
University Hospital of Santander, Universidad Industrial de Santander, Colombia. Electronic address: lumisosa@gmail.com |
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0305-4179 |
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| Notes |
PMID:28185802 |
Approved |
no |
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ref @ user @ |
Serial |
100297 |
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Gravina, G.L.; Mancini, A.; Colapietro, A.; Vitale, F.; Vetuschi, A.; Pompili, S.; Rossi, G.; Marampon, F.; Richardson, P.J.; Patient, L.; Patient, L.; Burbidge, S.; Festuccia, C. |
| Title |
The novel CXCR4 antagonist, PRX177561, reduces tumor cell proliferation and accelerates cancer stem cell differentiation in glioblastoma preclinical models |
Type |
Journal Article |
| Year |
2017 |
Publication |
Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine |
Abbreviated Journal |
Tumour Biol |
| Volume |
39 |
Issue |
6 |
Pages |
1010428317695528 |
| Keywords |
Adult; Animals; Cell Differentiation/drug effects; Cell Line, Tumor; Cell Movement/drug effects; Cell Proliferation/drug effects; Chemokine CXCL12/*genetics; Disease-Free Survival; Glioblastoma/*drug therapy/genetics; Humans; Mice; Neoplasm Recurrence, Local/*drug therapy/genetics/pathology; Neoplastic Stem Cells/drug effects/pathology; Neovascularization, Pathologic/*drug therapy/genetics/pathology; Receptors, CXCR4/antagonists & inhibitors/*genetics; Signal Transduction/drug effects; Tumor Microenvironment/drug effects; Cxcr4; Glioblastoma; angiogenesis; monocyte infiltration |
| Abstract |
Glioblastoma is the most frequent and the most lethal primary brain tumor among adults. Standard of care is the association of radiotherapy with concomitant or adjuvant temozolomide. However, to date, recurrence is inevitable. The CXCL12/CXCR4 pathway is upregulated in the glioblastoma tumor microenvironment regulating tumor cell proliferation, local invasion, angiogenesis, and the efficacy of radio-chemotherapy. In this study, we evaluated the effects of the novel CXCR4 antagonist, PRX177561, in preclinical models of glioblastoma. CXCR4 expression and PRX177561 effects were assessed on a panel of 12 human glioblastoma cells lines and 5 patient-derived glioblastoma stem cell cultures. Next, the effect of PRX177561 was tested in vivo, using subcutaneous injection of U87MG, U251, and T98G cells as well as orthotopic intrabrain inoculation of luciferase-transfected U87MG cells. Here we found that PRX177561 impairs the proliferation of human glioblastoma cell lines, increases apoptosis, and reduces CXCR4 expression and cell migration in response to stromal cell-derived factor 1alpha in vitro. PRX177561 reduced the expression of stem cell markers and increased that of E-cadherin and glial fibrillary acidic protein in U87MG cells consistent with a reduction in cancer stem cells. In vivo, PRX177561 reduced the weight and increased the time to progression of glioblastoma subcutaneous tumors while increasing disease-free survival and overall survival of mice bearing orthotopic tumors. Our findings suggest that targeting stromal cell-derived factor 1 alpha/CXCR4 axis by PRX177561 might represent a novel therapeutic approach against glioblastoma and support further investigation of this compound in more complex preclinical settings in order to determine its therapeutic potential. |
| Address |
1 Department of Biotechnological and Applied Clinical Sciences, Laboratory of Radiobiology, University of L'Aquila, L'Aquila, Italy |
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1010-4283 |
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| Notes |
PMID:28639900 |
Approved |
no |
| Call Number |
ref @ user @ |
Serial |
96581 |
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de Sousa, J.F.; Torrieri, R.; Serafim, R.B.; Di Cristofaro, L.F.M.; Escanfella, F.D.; Ribeiro, R.; Zanette, D.L.; Paco-Larson, M.L.; da Silva, W.A.J.; Tirapelli, D.P. da C.; Neder, L.; Carlotti, C.G.J.; Valente, V. |
| Title |
Expression signatures of DNA repair genes correlate with survival prognosis of astrocytoma patients |
Type |
Journal Article |
| Year |
2017 |
Publication |
Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine |
Abbreviated Journal |
Tumour Biol |
| Volume |
39 |
Issue |
4 |
Pages |
1010428317694552 |
| Keywords |
Apoptosis; Astrocytoma/genetics/metabolism/*mortality; Brain Neoplasms/genetics/metabolism/*mortality; Cell Cycle; Cell Line, Tumor; *DNA Repair; DNA Repair Enzymes/genetics/metabolism; Exodeoxyribonucleases/genetics/metabolism; Gene Expression; Humans; Kaplan-Meier Estimate; N-Glycosyl Hydrolases/genetics/metabolism; Prognosis; DNA repair; astrocytoma; genomic instability; glioblastoma; tumor progression |
| Abstract |
Astrocytomas are the most common primary brain tumors. They are very resistant to therapies and usually progress rapidly to high-grade lesions. Here, we investigated the potential role of DNA repair genes in astrocytoma progression and resistance. To this aim, we performed a polymerase chain reaction array-based analysis focused on DNA repair genes and searched for correlations between expression patters and survival prognoses. We found 19 genes significantly altered. Combining these genes in all possible arrangements, we found 421 expression signatures strongly associated with poor survival. Importantly, five genes (DDB2, EXO1, NEIL3, BRCA2, and BRIP1) were independently correlated with worse prognoses, revealing single-gene signatures. Moreover, silencing of EXO1, which is remarkably overexpressed, promoted faster restoration of double-strand breaks, while NEIL3 knockdown, also highly overexpressed, caused an increment in DNA damage and cell death after irradiation of glioblastoma cells. These results disclose the importance of DNA repair pathways for the maintenance of genomic stability of high-grade astrocytomas and suggest that EXO1 and NEIL3 overexpression confers more efficiency for double-strand break repair and resistance to reactive oxygen species, respectively. Thereby, we highlight these two genes as potentially related with tumor aggressiveness and promising candidates as novel therapeutic targets. |
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7 Center for Integrative Systems Biology (CISBi), NAP/USP, Ribeirao Preto, Brazil |
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1010-4283 |
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PMID:28378638 |
Approved |
no |
| Call Number |
ref @ user @ |
Serial |
96598 |
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Bischof, J.; Westhoff, M.-A.; Wagner, J.E.; Halatsch, M.-E.; Trentmann, S.; Knippschild, U.; Wirtz, C.R.; Burster, T. |
| Title |
Cancer stem cells: The potential role of autophagy, proteolysis, and cathepsins in glioblastoma stem cells |
Type |
Journal Article |
| Year |
2017 |
Publication |
Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine |
Abbreviated Journal |
Tumour Biol |
| Volume |
39 |
Issue |
3 |
Pages |
1010428317692227 |
| Keywords |
Animals; Autophagy; Brain Neoplasms/*metabolism/*pathology; Cathepsins/*metabolism; Glioblastoma/*metabolism/*pathology; Humans; Neoplastic Stem Cells/*metabolism/*pathology; Proteolysis; *Major histocompatibility complex class I; *autophagy; *cathepsin; *glioblastoma |
| Abstract |
One major obstacle in cancer therapy is chemoresistance leading to tumor recurrence and metastasis. Cancer stem cells, in particular glioblastoma stem cells, are highly resistant to chemotherapy, radiation, and immune recognition. In case of immune recognition, several survival mechanisms including, regulation of autophagy, proteases, and cell surface major histocompatibility complex class I molecules, are found in glioblastoma stem cells. In different pathways, cathepsins play a crucial role in processing functional proteins that are necessary for several processes and proper cell function. Consequently, strategies targeting these pathways in glioblastoma stem cells are promising approaches to interfere with tumor cell survival and will be discussed in this review. |
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3 Department of Neurosurgery, Surgery Center, Ulm University Medical Center, Ulm University, Ulm, Germany |
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English |
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1010-4283 |
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| Notes |
PMID:28347245 |
Approved |
no |
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ref @ user @ |
Serial |
96600 |
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