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Xu W, Huo J, Hu Q, Xu J, Chen G, Mo J, Zhou T, Jiang J. Association between lactate dehydrogenase to albumin ratio and acute kidney injury in patients with sepsis: a retrospective cohort study. Clin Exp Nephrol 2024:10.1007/s10157-024-02500-y. [PMID: 38584195 DOI: 10.1007/s10157-024-02500-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 03/27/2024] [Indexed: 04/09/2024]
Abstract
BACKGROUND Serum lactate dehydrogenase to albumin ratio (LAR) is associated with poor outcomes in malignancy and pneumonia. However, there are few studies suggesting that LAR is associated with the occurrence of acute kidney injury (AKI) in patients with sepsis, which was investigated in this study. METHODS We conducted a retrospective cohort study based on the Medical Information Mart for Intensive Care (MIMIC)-IV database. The primary outcome was the occurrence of AKI within 2 days and 7 days. Multivariable logistic regression models were used to calculate odds ratios to validate the association between LAR and AKI, in-hospital mortality, RRT use, and recovery of renal function, respectively. RESULTS A total of 4010 participants were included in this study. The median age of the participants was 63.5 years and the median LAR was 10.5. After adjusting for confounding variables, patients in the highest LAR quartile had a higher risk of AKI than those in the lowest LAR quartile within 2 days and 7 days, with odds ratios of 1.37 (95% confidence interval [CI]: 1.23-1.52) and 1.95 (95% CI: 1.72-2.22), respectively. The adjusted odds of AKI within 2 and 7 days were 1.16 (95% CI: 1.12-1.20) and 1.29 (95% CI: 1.24-1.35) for each 1 unit increase in LAR(log2), respectively. CONCLUSION This study demonstrated that elevated LAR was associated with poor prognosis in patients with sepsis. The risk of AKI and in-hospital mortality increased, the need for RRT increased, and the chance of recovery of renal function decreased with the increase of LAR.
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Affiliation(s)
- Weigan Xu
- Department of Emergency, First People's Hospital of Foshan, No.18 Lingnan Avenue North, Chancheng District, Foshan, 528000, Guangdong Province, China.
| | - Jianyang Huo
- Department of Emergency, First People's Hospital of Foshan, No.18 Lingnan Avenue North, Chancheng District, Foshan, 528000, Guangdong Province, China
| | - Qiaohua Hu
- Department of Emergency, First People's Hospital of Foshan, No.18 Lingnan Avenue North, Chancheng District, Foshan, 528000, Guangdong Province, China
| | - Jingtao Xu
- Department of Emergency, First People's Hospital of Foshan, No.18 Lingnan Avenue North, Chancheng District, Foshan, 528000, Guangdong Province, China
| | - Guojun Chen
- Department of Emergency, First People's Hospital of Foshan, No.18 Lingnan Avenue North, Chancheng District, Foshan, 528000, Guangdong Province, China
| | - Jierong Mo
- Department of Emergency, First People's Hospital of Foshan, No.18 Lingnan Avenue North, Chancheng District, Foshan, 528000, Guangdong Province, China
| | - Tianen Zhou
- Department of Emergency, First People's Hospital of Foshan, No.18 Lingnan Avenue North, Chancheng District, Foshan, 528000, Guangdong Province, China
| | - Jun Jiang
- First People's Hospital of Foshan, Foshan, Guangdong Province, China
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Turcato G, Zaboli A, Sibilio S, Brigo F. Prognostic role of albumin, lactate-to-albumin ratio and C-reactive protein-to-albumin ratio in infected patients. Am J Emerg Med 2024; 78:42-47. [PMID: 38199095 DOI: 10.1016/j.ajem.2023.12.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 12/12/2023] [Accepted: 12/26/2023] [Indexed: 01/12/2024] Open
Abstract
INTRODUCTION The prognostic evaluation of the septic patient has recently been enriched by some predictive indices such as albumin concentration, lactate/albumin ratio (LAR) and C-reactive protein/albumin ratio (CAR). The performance of these indices has been evaluated in septic patients in intensive care, but until now their performance in infected patients in the Emergency Department (ED) has not been evaluated. AIM To investigate the potential prognostic role of albumin, LAR and CAR in patients with infection in the ED. METHODS Single-centre prospective study performed between 1 January 2021 and 31 December 2021 at the ED of the Merano Hospital (Italy). All patients with infection were enrolled. The study outcome was death within 30 days. The predictive ability of albumin, LAR and CAR was assessed by area under the receiver operating characteristic curves (AUROCs). A multivariate logistic regression model was used to examine the association of the indices with 30-day mortality, with comorbidity, acute urgency and severity of infection as covariates. RESULTS The study enrolled 962 patients with an infectious status. The overall 30-day mortality rate was 8.9% (86/962). The AUROC of albumin was 0.831 (95% CI 0.795-868), while for LAR this was 0.773 (CI95% 0.719-0.827) and for CAR 0.718 (CI95% 0.664-0.771). The odds ratio for 30-day mortality for albumin was 3.362 (95% CI 1.904-5.936), for ln(LAR) 2.651 (95% CI 1.646-4.270) and for ln(CAR) 1.739 (95% CI 1.326-2.281). CONCLUSIONS All three indices had a good discriminatory ability for the risk of short-term death in patients with infection, indicating their promising use in the ED as well as in the ICU. Further studies are needed to confirm the better performance of albumin compared to LAR and CAR.
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Affiliation(s)
- Gianni Turcato
- Department of Internal Medicine, Intermediate Care Unit, Hospital Alto Vicentino (AULSS-7), Santorso, Italy.
| | - Arian Zaboli
- Innovation, Research and Teaching Service (SABES-ASDAA), Teaching Hospital of the Paracelsus Medical Private University (PMU), Bolzano, Italy
| | - Serena Sibilio
- Department of Emergency Medicine, Hospital of Merano-Meran (SABES-ASDAA), Merano-Meran, Italy; Lehrkrankenhaus der Paracelsus Medizinischen Privatuniversität, Salzburg, Austria
| | - Francesco Brigo
- Innovation, Research and Teaching Service (SABES-ASDAA), Teaching Hospital of the Paracelsus Medical Private University (PMU), Bolzano, Italy
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Turcato G, Zaboli A, Sibilio S, Parodi M, Mian M, Brigo F. The role of lactate-to-albumin ratio to predict 30-day risk of death in patients with sepsis in the emergency department: a decision tree analysis. Curr Med Res Opin 2024; 40:345-352. [PMID: 38305238 DOI: 10.1080/03007995.2024.2314740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 02/01/2024] [Indexed: 02/03/2024]
Abstract
BACKGROUND Accurately estimating the prognosis of septic patients on arrival in the emergency department (ED) is clinically challenging. The lactate-to-albumin ratio (LAR) has recently been proposed to improve the predictive performance of septic patients admitted to the ICU. OBJECTIVES This study aims to assess whether the LAR could be used as an early prognostic marker of 30-day mortality in patients with sepsis in the ED. METHODS A prospective observational study was conducted in the ED of the Hospital of Merano. All patients with a diagnosis of sepsis were considered. The LAR was recorded on arrival in the ED. The primary outcome measure was mortality at 30 days. The predictive role of the LAR for mortality was evaluated with the area under the ROC curve, logistic regression adjusted for the Charlson Comorbidity Index value, National Early Warning Score, and Sequential Organ Failure score, and with decision tree analysis. RESULTS 459 patients were enrolled, of whom 17% (78/459) died at 30 days. The median LAR of the patients who died at 30 days (0.78 [0.45-1.19]) was significantly higher than the median LAR of survivors (0.42 [0.27-0.65]) (p < 0.001). The discriminatory ability of the LAR for death at 30 days was 0.738, higher than that of lactate alone (0.692), and slightly lower than that of albumin alone (0.753). The decision trees confirmed the role of the LAR as an independent risk factor for mortality. CONCLUSION The LAR can be used as an index to better predict the 30-day risk of death in septic patients.
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Affiliation(s)
- Gianni Turcato
- Department of Internal Medicine, Intermediate Care Unit, Santorso, Italy
| | - Arian Zaboli
- Innovation, Research and Teaching Service (SABES-ASDAA), Teaching Hospital of the Paracelsus Medical Private University (PMU), Bolzano, Italy
| | - Serena Sibilio
- Department of Emergency Medicine, Hospital of Merano-Meran (SABES-ASDAA), Merano-Meran, Italy
- Lehrkrankenhaus der Paracelsus Medizinischen Privatuniversität, Salzburg, Austria
| | - Marta Parodi
- Department of Internal Medicine, Intermediate Care Unit, Santorso, Italy
| | - Michael Mian
- Innovation, Research and Teaching Service (SABES-ASDAA), Teaching Hospital of the Paracelsus Medical Private University (PMU), Bolzano, Italy
- College of Health Care-Professions Claudiana, Bozen, Italy
| | - Francesco Brigo
- Innovation, Research and Teaching Service (SABES-ASDAA), Teaching Hospital of the Paracelsus Medical Private University (PMU), Bolzano, Italy
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Banday I, Malik AA, Khan MA, Parray F, Wani RA, Banday M, Zahoor H. Validation of Urdu Version of the Low Anterior Resection Syndrome ( LARS) Score. Indian J Surg Oncol 2023; 14:909-917. [PMID: 38187850 PMCID: PMC10766916 DOI: 10.1007/s13193-023-01801-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 07/14/2023] [Indexed: 01/09/2024] Open
Abstract
Patients subjected to low anterior resection for rectal cancers experience a constellation of symptoms of disordered bowel function which leads to a detriment in the quality of life. The LAR syndrome (LARS) score is a self-administered questionnaire to identify and assess disordered bowel function after resective surgery. The objective of this study was to validate the Urdu version of the LARS score. The translation process was carried out in a fashion outlined by the original authors of the LARS score after obtaining proper permission. The validation of the translated version included the assessment of its reliability, convergent and discriminant validities, internal consistency, and confirmatory analyses. A total of 60 patients were enrolled in the study with a 95% power of study. The translated questionnaire was initially administered to a random subgroup of patients to verify the adequacy and degree of comprehension of questions. Then reproducibility was investigated by a test-retest procedure. An analysis was then done to determine the correlation between Urdu LARS score and a quality of life related question that was included along with the questionnaire. The Urdu version of the LARS score demonstrates a high convergent validity in terms of its correlation with self-reported quality of life. It also demonstrated its efficacy to discriminate between clinical variables expected to differ with regards to LARS. There was almost perfect agreement in the test and retest values demonstrating good reliability across all instruments. The Urdu version of the LARS score has proven to be a reliable and a valid tool for measuring LARS in the Urdu speaking population of the Indian subcontinent. Supplementary Information The online version contains supplementary material available at 10.1007/s13193-023-01801-0.
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Affiliation(s)
- Imad Banday
- Department of General and Minimal Invasive Surgery, Sher-i-Kashmir Institute of Medical Sciences, Soura, Srinagar India
| | - Ajaz Ahmad Malik
- Department of General and Minimal Invasive Surgery, Sher-i-Kashmir Institute of Medical Sciences, Soura, Srinagar India
| | - Mohammad Abrar Khan
- Department of General and Minimal Invasive Surgery, Sher-i-Kashmir Institute of Medical Sciences, Soura, Srinagar India
| | - Fazl Parray
- Colorectal Division, Department of General and Minimal Invasive Surgery, Sher-i-Kashmir Institute of Medical Sciences, Soura, Srinagar India
| | - Rauf Ahmad Wani
- Colorectal Division, Department of General and Minimal Invasive Surgery, Sher-i-Kashmir Institute of Medical Sciences, Soura, Srinagar India
| | - Meeran Banday
- Sher-i-Kashmir Institute of Medical Sciences, Soura, Srinagar India
| | - Hanna Zahoor
- Department of Radiodiagnosis and Imaging, Acharya Shri Chander College of Medical Sciences, Sidhra, Jammu India
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González-Torres L, García-Paz V, Meijide A, Goikoetxea MJ, Salgado MA, Sanz ML, Vila L. Local allergic rhinitis in children: Clinical characteristics and role of basophil activation test as a diagnostic tool. Int J Pediatr Otorhinolaryngol 2023; 172:111645. [PMID: 37481991 DOI: 10.1016/j.ijporl.2023.111645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/12/2023] [Accepted: 07/02/2023] [Indexed: 07/25/2023]
Abstract
BACKGROUND Local allergic rhinitis (LAR) is a condition involving a localized nasal allergic response in absence of systemic atopy. Most studies on LAR have been performed in adults. We aimed to describe clinical characteristics of LAR pediatric patients, its clinical evolution over a 7-year follow-up period and to study the role of basophil activation test (BAT), for its diagnosis. METHODS Forty-four children with non-allergic rhinitis (NAR) were included (24 males, 20 females, aged under 15 years). Nasal allergen provocation test (NAPT) and BAT were performed with Dermatophagoides pteronyssinus and Phleum pratense. RESULTS Seven patients (16%) were diagnosed of LAR. Six reacted to D pteronyssinus and one to P pratense. All LAR and 86% of NAR patients presented perennial symptoms. Fifty-seven percent of NAR and LAR patients referred persistent symptoms. Around half of NAR and LAR patients reported mild-moderate clinical manifestations. Three LAR patients associated conjunctival symptoms, proportionally more than NAR patients (19%, 7 out of 37). NAR patients presented bronchial asthma (n = 10) more frequently than LAR children (n = 1). More than half of LAR and NAR patients presented family history of atopy. BAT was negative in all LAR patients. On follow-up, 3 LAR patients and 10 of the 25 NAR patients who agreed to be retested, presented systemic sensitization. Dust mites were the most frequent allergen involved. CONCLUSIONS LAR should be ruled out in children with NAR. Almost half of children with LAR develop systemic sensitization over time. BAT shows low sensitivity for the diagnosis of LAR in children.
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Affiliation(s)
- L González-Torres
- Allergy Pediatric Unit, Complexo Hospitalario Universitario, A Coruña, Spain
| | - V García-Paz
- Allergy Pediatric Unit, Complexo Hospitalario Universitario, A Coruña, Spain
| | - A Meijide
- Allergy Unit, Complexo Hospitalario Universitario de Vigo, Spain
| | - M J Goikoetxea
- Allergy Unit, Clinica Universitaria de Navarra, Pamplona, Spain
| | - M A Salgado
- Allergy Unit, Clinica Universitaria de Navarra, Pamplona, Spain
| | - M L Sanz
- Allergy Unit, Clinica Universitaria de Navarra, Pamplona, Spain
| | - L Vila
- Allergy Pediatric Unit, Complexo Hospitalario Universitario, A Coruña, Spain.
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Kwiatkowska K, Rhone P, Koziorzemska P, Formanowicz D, Ruszkowska-Ciastek B. Complex Analysis of Endothelial Markers as Potential Prognostic Indicators in Luminal Invasive Breast Carcinoma Patients: Outcomes of a Six-Year Observational Study. Biomedicines 2023; 11:2246. [PMID: 37626742 PMCID: PMC10452676 DOI: 10.3390/biomedicines11082246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 07/22/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
(1) Background: Metastasis is a complex process in which the primary cancer cells spread to a distant organ or organs, creating a secondary tumor location, which in many patients leads to treatment failure and death. The aim of the present study was to assess the association of endothelial markers (i.e., sP-selectin, sE-selectin and von Willebrand factor) with the leptin-to-adiponectin ratio (LAR) and to perform an analysis of the predictive value on the survival of patients with luminal A and B invasive breast cancer (IBrC). (2) Methods: The trial included 70 treatment-naïve early-stage IBrC patients with a median age of 54.5 years and a median tumor diameter of 1.5 cm. The median duration of follow-up was 5.7 years, with a relapse rate of 15.71%. Specific immunoenzymatic kits were used to determine pre- and post-treatment concentrations of analyzed factors. (3) Results: Regardless of the treatment pattern, endothelial marker concentrations and the LAR increased after adjuvant treatment. The follow-up showed a significantly higher relapse rate in patients with IBrC who had higher pre-treatment sP-selectin and post-treatment LAR levels. According to receiver operating characteristic (ROC) analysis, a post-treatment LAR with a sensitivity of 88.9% and specificity of 57.9% discriminating cases with or without disease relapse. Additionally, a higher risk of breast cancer relapse was associated with a lower post-treatment sP-selectin concentration. (4) Conclusions: Our results showed mainly that pre-treatment sP-selectin levels and post-treatment LAR may have value as prognostic indicators and may contribute to predicting the future outcomes in patients with early-stage IBrC.
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Affiliation(s)
- Katarzyna Kwiatkowska
- Department of Pathophysiology, Faculty of Pharmacy, Nicolaus Copernicus University, Collegium Medicum, 85-094 Bydgoszcz, Poland;
| | - Piotr Rhone
- Clinical Ward of Breast Cancer and Reconstructive Surgery, Oncology Centre Prof. F. Łukaszczyk Memorial Hospital, 85-796 Bydgoszcz, Poland;
| | - Paulina Koziorzemska
- Department of Pathophysiology, Faculty of Pharmacy, Nicolaus Copernicus University, Collegium Medicum, 85-094 Bydgoszcz, Poland;
| | - Dorota Formanowicz
- Department of Medical Chemistry and Laboratory Medicine, Poznan University of Medical Sciences, 60-806 Poznan, Poland;
- Department of Stem Cells and Regenerative Medicine, Institute of Natural Fibres and Medicinal Plants-National Research, 62-064 Plewiska, Poland
| | - Barbara Ruszkowska-Ciastek
- Department of Pathophysiology, Faculty of Pharmacy, Nicolaus Copernicus University, Collegium Medicum, 85-094 Bydgoszcz, Poland;
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Zheng W, Han X, Han B, Li G, Gan J, Wang T, Xu B, He J, Du W, Cao X, Wang Z. LAR Downregulation Protects the Astrocytic U251 and Cocultured SH-SY5Y Cells in a Rotenone-Induced Parkinson's Disease Cell Model. Int J Mol Sci 2023; 24:11111. [PMID: 37446291 DOI: 10.3390/ijms241311111] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/23/2023] [Accepted: 06/30/2023] [Indexed: 07/15/2023] Open
Abstract
Leukocyte common antigen-related protein tyrosine phosphatase (LAR) is a member of the protein tyrosine phosphatase family that serves as a key regulator of cellular survival. It is also involved in neurodevelopment and brain disorders. This study was designed to investigate the role of LAR in a cell-based model of Parkinson's disease (PD) in which U251 and SH-SY5Y cells were used as models of astrocytes and dopaminergic neurons, respectively. Cell viability, cell death, cell morphology, protein phosphorylation and expression, ATP levels, reactive oxygen species (ROS) generation, and mitochondrial membrane potential were analyzed in the wild-type (WT) and heterozygous LAR-knockout astrocytoma U251 cells to assess the cell state, signal transduction, and mitochondrial function. LAR downregulation showed a protective effect in rotenone-exposed U251 cells by increasing cell viability, reducing cell mortality, and restoring appropriate cellular morphology. LAR downregulation enhanced IGF-1R phosphorylation and downstream signal transduction as evidenced by increases in the Akt and GSK-3β phosphorylation, as well as the upregulation of NRF2 and HO-1. The downregulation of LAR also augmented DJ-1 levels in these cells. The enhanced Akt and GSK-3β phosphorylation contributed to a reduced Bax/Bcl2 ratio and suppressed apoptosis after rotenone exposure. Heterozygous LAR-knockout U251 cells exhibited higher mitochondrial function evidenced by increased mitochondrial membrane potential, ATP contents, and reduced ROS production compared to the WT cells following rotenone exposure. Further studies showed that the astrocytic protection mediated by the heterozygous knockout of LAR was associated with the activation of Akt. A specific Akt inhibitor, MK2206, reduced the cell viability, Akt and GSK3β phosphorylation, and HO-1 and NRF2 expression in U251 cells exposed to rotenone. Astrocytes provide structural and metabolic support to maintain neuronal health. Astrocytic glial cell-derived neurotrophic factor (GDNF) production is vital for dopaminergic neuron survival. Heterozygous LAR-knockout U251 cells produced higher amounts of GDNF than the WT cells. The SH-SY5Y cells cocultured with heterozygous LAR-knockout U251 cells exhibited greater viability than that of cells cocultured with WT U251 cells in response to rotenone. Together, these findings demonstrate that the heterozygous knockout of LAR in astrocytes can play a key role in protecting both astrocytic cells and cocultured neurons in a rotenone-induced cell-based model of PD. This neuroprotective effect is attributable to the augmentation of IGF1R-Akt-GDNF signaling and the maintenance of astrocytic mitochondrial function.
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Affiliation(s)
- Wei Zheng
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China
| | - Xiao Han
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China
| | - Bing Han
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China
| | - Gang Li
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China
| | - Jing Gan
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China
| | - Tian Wang
- School of Pharmacy, Yantai University, Yantai 264005, China
| | - Bo Xu
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China
| | - Jie He
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China
| | - Wenxiao Du
- College of Life Sciences, Yantai University, Yantai 264005, China
| | - Xiaolin Cao
- College of Life Sciences, Yantai University, Yantai 264005, China
| | - Zhenhua Wang
- Center for Mitochondria and Healthy Aging, College of Life Sciences, Yantai University, Yantai 264005, China
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Le C, Hu X, Tong L, Ye X, Zhang J, Yan J, Sherchan P, Zhang JH, Gao F, Tang J. Inhibition of LAR attenuates neuroinflammation through RhoA/IRS-1/Akt signaling pathway after intracerebral hemorrhage in mice. J Cereb Blood Flow Metab 2023; 43:869-881. [PMID: 36802818 PMCID: PMC10196755 DOI: 10.1177/0271678x231159352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 01/03/2023] [Accepted: 01/28/2023] [Indexed: 02/23/2023]
Abstract
Leukocyte common antigen-related phosphatase (LAR) is widely expressed in the central nervous system and is known to regulate a variety of processes including cell growth, differentiation, and inflammation. However, little is currently known about LAR signaling mediated neuroinflammation after intracerebral hemorrhage (ICH). The objective of this study was to investigate the role of LAR in ICH using autologous blood injection-induced ICH mouse model. Expression of endogenous proteins, brain edema and neurological function after ICH were evaluated. Extracellular LAR peptide (ELP), an inhibitor of LAR, was administered to ICH mice and outcomes were evaluated. LAR activating-CRISPR or IRS inhibitor NT-157 was administered to elucidate the mechanism. The results showed that expressions of LAR, its endogenous agonist chondroitin sulfate proteoglycans (CSPGs) including neurocan and brevican, and downstream factor RhoA increased after ICH. Administration of ELP reduced brain edema, improved neurological function, and decreased microglia activation after ICH. ELP decreased RhoA and phosphorylated serine-IRS1, increased phosphorylated tyrosine-IRS1 and p-Akt, and attenuated neuroinflammation after ICH, which was reversed by LAR activating-CRISPR or NT-157. In conclusion, this study demonstrated that LAR contributed to neuroinflammation after ICH via RhoA/IRS-1 pathway, and ELP may be a potential therapeutic strategy to attenuate LAR mediated neuroinflammation after ICH.
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Affiliation(s)
- Chensheng Le
- Department of Neurology, The Second
Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou,
China
- Department of Physiology and
Pharmacology, Loma Linda University, Loma Linda, CA, USA
- Department of Neurology, Ningbo
Medical Center Lihuili Hospital, Ningbo, China
| | - Xin Hu
- Department of Physiology and
Pharmacology, Loma Linda University, Loma Linda, CA, USA
- Department of Neurosurgery, West
China Hospital, Sichuan University, Chengdu, China
| | - Lusha Tong
- Department of Neurology, The Second
Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou,
China
- Department of Physiology and
Pharmacology, Loma Linda University, Loma Linda, CA, USA
| | - Xianghua Ye
- Department of Neurology, The Second
Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou,
China
| | - Junyi Zhang
- Department of Physiology and
Pharmacology, Loma Linda University, Loma Linda, CA, USA
| | - Jun Yan
- Department of Physiology and
Pharmacology, Loma Linda University, Loma Linda, CA, USA
- Department of Neurosurgery, Guangxi
Medical University Cancer Hospital, Nanning, China
| | - Prativa Sherchan
- Department of Physiology and
Pharmacology, Loma Linda University, Loma Linda, CA, USA
| | - John H Zhang
- Department of Physiology and
Pharmacology, Loma Linda University, Loma Linda, CA, USA
| | - Feng Gao
- Department of Neurology, The Second
Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou,
China
| | - Jiping Tang
- Department of Physiology and
Pharmacology, Loma Linda University, Loma Linda, CA, USA
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Lamont BB, Williams MR, He T. Relative growth rate (RGR) and other confounded variables: mathematical problems and biological solutions. Ann Bot 2023; 131:555-568. [PMID: 36794962 PMCID: PMC10147329 DOI: 10.1093/aob/mcad031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 02/14/2023] [Indexed: 05/20/2023]
Abstract
BACKGROUND Relative growth rate (RGR) has a long history of use in biology. In its logged form, RGR = ln[(M + ΔM)/M], where M is size of the organism at the commencement of the study, and ΔM is new growth over time interval Δt. It illustrates the general problem of comparing non-independent (confounded) variables, e.g. (X + Y) vs. X. Thus, RGR depends on what starting M(X) is used even within the same growth phase. Equally, RGR lacks independence from its derived components, net assimilation rate (NAR) and leaf mass ratio (LMR), as RGR = NAR × LMR, so that they cannot legitimately be compared by standard regression or correlation analysis. FINDINGS The mathematical properties of RGR exemplify the general problem of 'spurious' correlations that compare expressions derived from various combinations of the same component terms X and Y. This is particularly acute when X >> Y, the variance of X or Y is large, or there is little range overlap of X and Y values among datasets being compared. Relationships (direction, curvilinearity) between such confounded variables are essentially predetermined and so should not be reported as if they are a finding of the study. Standardizing by M rather than time does not solve the problem. We propose the inherent growth rate (IGR), lnΔM/lnM, as a simple, robust alternative to RGR that is independent of M within the same growth phase. CONCLUSIONS Although the preferred alternative is to avoid the practice altogether, we discuss cases where comparing expressions with components in common may still have utility. These may provide insights if (1) the regression slope between pairs yields a new variable of biological interest, (2) the statistical significance of the relationship remains supported using suitable methods, such as our specially devised randomization test, or (3) multiple datasets are compared and found to be statistically different. Distinguishing true biological relationships from spurious ones, which arise from comparing non-independent expressions, is essential when dealing with derived variables associated with plant growth analyses.
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Affiliation(s)
- Byron B Lamont
- Ecology Section, School of Molecular and Life Sciences, Curtin University, PO Box U1987, Perth, WA 6845, Australia
| | - Matthew R Williams
- Biodiversity and Conservation Science, Department of Biodiversity, Conservation & Attractions, Kensington, WA 6151, Australia
| | - Tianhua He
- Ecology Section, School of Molecular and Life Sciences, Curtin University, PO Box U1987, Perth, WA 6845, Australia
- College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA 6150, Australia
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10
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Meyer J, van der Schelling G, Wijsman J, Ris F, Crolla R. Predictors for selective flexure mobilization during robotic anterior resection for rectal cancer: a prospective cohort analysis. Surg Endosc 2023:10.1007/s00464-023-10008-x. [PMID: 37010604 DOI: 10.1007/s00464-023-10008-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Accepted: 03/09/2023] [Indexed: 04/04/2023]
Abstract
INTRODUCTION Splenic flexure mobilization (SFM) may be indicated during anterior resection to provide a tension-free anastomosis. However, to date, no score allows identifying patients who may benefit from SFM. METHODS Patients who underwent robotic anterior resection for rectal cancer were identified from a prospective register. Demographic and cancer-related variables were extracted, and predictors of SFM were identified using regression models. Thereafter, 20 patients with SFM and 20 patients without SFM were randomly selected and their pre-operative CTscan were reviewed. The radiological index was defined as 1/(sigmoid length/pelvis depth). The optimal cut-off value for predicting SFM was identified using ROC curve analysis. RESULTS Five hundred and twenty-four patients were included. SFM was performed in 121 patients (27.8%) and increased operative time by 21.8 min (95% CI: 11.3 to 32.4, p < 0.001). The incidence of postoperative complications did not differ between patient with or without SFM. Realization of an anastomosis was the main predictor for SFM (OR: 42.4, 95% CI: 5.8 to 308.5, p < 0.001). In patients with colorectal anastomosis, both sigmoid length (15 ± 5.1 cm versus 24.2 ± 80.9 cm, p < 0.001) and radiological index (1 ± 0.3 versus 0.6 ± 0.2, p < 0.001) differed between patients who had SFM and patients who did not. ROC curve analysis of the radiological index indicated an optimal cut-off value of 0.8 (sensitivity: 75%, specificity: 90%). CONCLUSION SFM was performed in 27.8% of patients who underwent robotic anterior resection, and increased operative time by 21.8 min. For optimal surgical planning, patients requiring SFM can be identified based on pre-operative CT using the index 1/(sigmoid length/pelvis depth) with a cut-off value set at 0.8.
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Affiliation(s)
- Jeremy Meyer
- Division of Digestive Surgery, University Hospitals of Geneva, Rue Gabrielle-Perret-Gentil 4, 1211, Geneva 14, Switzerland.
- Medical School, University of Geneva, Rue Michel-Servet 1, 1206, Geneva, Switzerland.
- Amphia Ziekenhuis, Molengracht 21, 4818CK, Breda, Netherlands.
| | | | - Jan Wijsman
- Amphia Ziekenhuis, Molengracht 21, 4818CK, Breda, Netherlands
| | - Frédéric Ris
- Division of Digestive Surgery, University Hospitals of Geneva, Rue Gabrielle-Perret-Gentil 4, 1211, Geneva 14, Switzerland
- Medical School, University of Geneva, Rue Michel-Servet 1, 1206, Geneva, Switzerland
| | - Rogier Crolla
- Amphia Ziekenhuis, Molengracht 21, 4818CK, Breda, Netherlands
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11
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Yue E, Huang Y, Qian L, Lu Q, Wang X, Qian H, Yan J, Ruan S. Comparative Analysis of Proanthocyanidin Metabolism and Genes Regulatory Network in Fresh Leaves of Two Different Ecotypes of Tetrastigma hemsleyanum. Plants (Basel) 2022; 11:plants11020211. [PMID: 35050099 PMCID: PMC8779916 DOI: 10.3390/plants11020211] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/09/2022] [Accepted: 01/10/2022] [Indexed: 05/05/2023]
Abstract
Tetrastigma hemsleyanum Diels et Gilg is a rare and wild medicinal resource. Metabolites, especially secondary metabolites, have an important influence on T. hemsleyanum adaptability and its medicinal quality. The metabolite proanthocyanidin (PA) is a polyphenol compound widely distributed in land plants, which can be used as antioxidants and anticancer agents. Here, we discovered that three types of PA accumulated in large amounts in purple leaves (PL), but not in green leaves (RG), based on widely non-targeted metabolomics. In addition, we further found that catechins and their derivatives, which are the structural units of PA, are also enriched in PL. Afterwards, we screened and obtained five key genes, DNR1/2, ANS, ANR and LAR closely related to PA biosynthesis through transcriptome analysis and found they were all highly expressed in PL compared to RG. Therefore, observed the regulatory relationship between the main compounds and genes network, and the PA metabolism regulatory pathway was complicated, which may be different to other species.
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Affiliation(s)
- Erkui Yue
- Institute of Crop Science & Ecology, Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, China or (E.Y.); (Y.H.); (L.Q.); (X.W.)
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China;
| | - Yuqing Huang
- Institute of Crop Science & Ecology, Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, China or (E.Y.); (Y.H.); (L.Q.); (X.W.)
| | - Lihua Qian
- Institute of Crop Science & Ecology, Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, China or (E.Y.); (Y.H.); (L.Q.); (X.W.)
| | - Qiujun Lu
- Agricultural and Rural Affairs Guarantee Center, Hangzhou Agricultural and Rural Bureau, Hangzhou 310020, China;
| | - Xianbo Wang
- Institute of Crop Science & Ecology, Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, China or (E.Y.); (Y.H.); (L.Q.); (X.W.)
| | - Haifeng Qian
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China;
| | - Jianli Yan
- Institute of Crop Science & Ecology, Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, China or (E.Y.); (Y.H.); (L.Q.); (X.W.)
- Correspondence: (J.Y.); (S.R.)
| | - Songlin Ruan
- Institute of Crop Science & Ecology, Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, China or (E.Y.); (Y.H.); (L.Q.); (X.W.)
- Correspondence: (J.Y.); (S.R.)
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12
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Petrovska R, Brang P, Gessler A, Bugmann H, Hobi ML. Grow slowly, persist, dominate-Explaining beech dominance in a primeval forest. Ecol Evol 2021; 11:10077-10089. [PMID: 34367560 PMCID: PMC8328449 DOI: 10.1002/ece3.7800] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 05/15/2021] [Indexed: 12/20/2022] Open
Abstract
Being able to persist in deep shade is an important characteristic of juvenile trees, often leading to a strong dominance of shade-tolerant species in forests with low canopy turnover and a low disturbance rate. While leaf, growth, and storage traits are known to be key components of shade tolerance, their interplay during regeneration development and their influence on juveniles' survival time remains unclear. We assessed the ontogenetic effects of these three traits on the survival time of beech (Fagus sylvatica), and Norway and sycamore maples (Acer pseudoplatanus, Acer platanoides) in a primeval beech forest. Biomass allocation, age, and content of nonstructural carbohydrates (NSC) were measured in the stems and roots of 289 seedlings and saplings in high- and low-vitality classes. Saplings experienced a trade-off between absolute growth rate (AGR) and storage (NSC) as the leaf area ratio (LAR) decreases with biomass development. High LAR but low AGR and low NSC corresponded to beech with a marked ability to persist in deep shade while awaiting canopy release. In turn, a comparably small LAR in combination with a high AGR and higher storage (NSC), as observed in Norway maple and sycamore maple, reduced sapling survival time, thus offering an explanation for beech dominance and maple disappearance in the undergrowth of old-growth beech forests.
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Affiliation(s)
- Roksolana Petrovska
- Swiss Federal Institute for Forest, Snow and Landscape Research WSLBirmensdorfSwitzerland
- Forest EcologyDepartment of Environmental Systems ScienceETH ZürichZurichSwitzerland
| | - Peter Brang
- Swiss Federal Institute for Forest, Snow and Landscape Research WSLBirmensdorfSwitzerland
| | - Arthur Gessler
- Swiss Federal Institute for Forest, Snow and Landscape Research WSLBirmensdorfSwitzerland
| | - Harald Bugmann
- Forest EcologyDepartment of Environmental Systems ScienceETH ZürichZurichSwitzerland
| | - Martina Lena Hobi
- Swiss Federal Institute for Forest, Snow and Landscape Research WSLBirmensdorfSwitzerland
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Abstract
Protein Tyrosine Phosphatases reverse cellular signals initiated by growth factors receptors and other tyrosine kinases by dephosphorylating phosphotyrosine on target proteins. The activity of these enzymes is crucial for maintaining cell homeostasis, yet these enzymes have been often dismissed as humble house-keeping proteins. Understandably, mutations and changes in expression patterns of Protein Tyrosine Phosphatases are implicated in tumorigenesis and various carcinomas. The conserved nature of their catalytic domains makes drug discovery a challenging pursuit. In this review, we focus on describing the various classes of Protein Tyrosine Phosphatases and their catalytic domains. We also summarize their role in cancer and neurodegenerative diseases using specific members as the model system. Finally, we explain the dichotomy in the biological role of catalytically active vs the pseudoenzyme forms of Protein Tyrosine Phosphatases in the context of their membrane bound receptor forms. This chapter aims to provide a current understanding of these proteins, in the background of their foundational past research.
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Affiliation(s)
- Colin L Welsh
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, College of Medicine, Medical University of South Carolina, Charleston, SC, United States
| | - Preeti Pandey
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, College of Medicine, Medical University of South Carolina, Charleston, SC, United States
| | - Lalima G Ahuja
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, College of Medicine, Medical University of South Carolina, Charleston, SC, United States; Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, United States.
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Hu T, Zhao G, Liu Y, Long M. A Machine Learning Approach to Differentiate Two Specific Breast Cancer Subtypes Using Androgen Receptor Pathway Genes. Technol Cancer Res Treat 2021; 20:15330338211027900. [PMID: 34159849 PMCID: PMC8226237 DOI: 10.1177/15330338211027900] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Triple-negative breast cancer is a heterogeneous disease with different molecular
and histological subtypes. The Androgen receptor is expressed in a portion of
triple-negative breast cancer cases and the activation of the androgen receptor
pathway is thought to be a molecular subtyping signature as well as a
therapeutic target for triple-negative breast cancer. Thus, identification of
the androgen receptor pathway status is important for both molecular
characterization andclinical management. In this study, we investigate the
expression of the androgen receptor pathway in metaplastic breast cancer and
luminal androgen receptor subtypes of triple-negative breast cancer and found
that the androgen receptor pathway was downregulated in metaplastic breast
cancer compared to luminal androgen receptor subtype. Using random forest, we
found that the two subtypes of breast cancer can be molecularly classified with
the gene expression of the androgen receptor pathway.
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Affiliation(s)
- Taobo Hu
- Department of Breast Surgery, 71185Peking University People's Hospital, Beijing, China
| | - Guiyang Zhao
- Department of Oncology, Beijing Changping Hospital, Beijing, China
| | - Yiqiang Liu
- Department of Pathology, 71185Peking University Cancer Hospital, Beijing, China
| | - Mengping Long
- Department of Pathology, 71185Peking University Cancer Hospital, Beijing, China
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15
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Sakamoto K, Ozaki T, Suzuki Y, Kadomatsu K. Type IIa RPTPs and Glycans: Roles in Axon Regeneration and Synaptogenesis. Int J Mol Sci 2021; 22:5524. [PMID: 34073798 DOI: 10.3390/ijms22115524] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/18/2021] [Accepted: 05/20/2021] [Indexed: 02/06/2023] Open
Abstract
Type IIa receptor tyrosine phosphatases (RPTPs) play pivotal roles in neuronal network formation. It is emerging that the interactions of RPTPs with glycans, i.e., chondroitin sulfate (CS) and heparan sulfate (HS), are critical for their functions. We highlight here the significance of these interactions in axon regeneration and synaptogenesis. For example, PTPσ, a member of type IIa RPTPs, on axon terminals is monomerized and activated by the extracellular CS deposited in neural injuries, dephosphorylates cortactin, disrupts autophagy flux, and consequently inhibits axon regeneration. In contrast, HS induces PTPσ oligomerization, suppresses PTPσ phosphatase activity, and promotes axon regeneration. PTPσ also serves as an organizer of excitatory synapses. PTPσ and neurexin bind one another on presynapses and further bind to postsynaptic leucine-rich repeat transmembrane protein 4 (LRRTM4). Neurexin is now known as a heparan sulfate proteoglycan (HSPG), and its HS is essential for the binding between these three molecules. Another HSPG, glypican 4, binds to presynaptic PTPσ and postsynaptic LRRTM4 in an HS-dependent manner. Type IIa RPTPs are also involved in the formation of excitatory and inhibitory synapses by heterophilic binding to a variety of postsynaptic partners. We also discuss the important issue of possible mechanisms coordinating axon extension and synapse formation.
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16
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Neumann K, Randhawa N, Park J, Hochman DJ. Cost Analysis of Laparoscopic Low Anterior Resection vs. Transanal Endoscopic Microsurgery for Rectal Neoplasms. ACTA ACUST UNITED AC 2021; 28:1795-1802. [PMID: 34064717 PMCID: PMC8161775 DOI: 10.3390/curroncol28030167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 05/06/2021] [Indexed: 11/16/2022]
Abstract
Despite the increasing application of transanal endoscopic microsurgery (TEM) for rectal lesions, the cost of the equipment may play a role in a hospital's hesitancy to invest in the platform. This study compares the cost of TEM to laparoscopic low anterior resection (LAR). Patients who underwent laparoscopic LAR (n = 24) for rectal neoplasm between 2006 and 2014 were case-matched based on sex, age, comorbidities, lesion size and location to patients who underwent TEM at a busy secondary care urban hospital. Procedure-related costs and costs associated with readmissions for complications and related subsequent surgeries in the first 3 years were calculated. There were 42 hospital admissions for 24 LAR patients, totalling 326 hospital days. For 24 TEM patients, there were 25 hospital admissions, totalling 56 hospital days. Subsequent operations for LAR patients included 2 washout and diverting ileostomies (8%), 2 adhesionolysis (8%), 4 ventral hernia repairs (16%) and 11 ileostomy reversals (46%). In the TEM group, there was one operation for recurrence (4%). The mean cost of LAR, including all related hospital costs in the subsequent 3 years, was CAD 14,851 (95% CI: CAD 10,124-19,579). The mean cost of TEM was CAD 2449 (95% CI: CAD 2133-2767; p < 0.0001), with a savings of CAD 12,402 per patient. TEM for rectal neoplasm is associated with significantly lower hospital costs, which far outweigh the costs of acquiring and maintaining the technology.
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Affiliation(s)
- Katerina Neumann
- Division of General Surgery, Dalhousie University, 8-819 Victoria Building, VGH, 1276 South Park Street, Halifax, NS B2H 2Y9, Canada
- Correspondence: ; Tel.: +1-902-473-3937
| | - Nirmal Randhawa
- Faculty of Medicine, University of Manitoba, 750 Bannatyne Ave, Winnipeg, MB R3E 0W2, Canada;
| | - Jason Park
- Division of General Surgery, Vancouver General Hospital, 5th Floor—2775 Laurel Street, Vancouver, BC V5Z 1M9, Canada;
| | - David J. Hochman
- Division of General Surgery, University of Manitoba, St. Boniface Clinic, 343 Tache Avenue, Winnipeg, MB R2H 2A5, Canada;
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Aday U, Tatlı F, Akpulat FV, İnan M, Kafadar MT, Bilge H, Başol Ö, Oğuz A. Prognostic significance of pretreatment serum lactate dehydrogenase-to-albumin ratio in gastric cancer. Contemp Oncol (Pozn) 2020; 24:145-9. [PMID: 33235539 DOI: 10.5114/wo.2020.100219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 06/29/2020] [Indexed: 12/23/2022] Open
Abstract
Aim of the study To investigate the prognostic role of lactate dehydrogenase-to-albumin ratio (LAR) in gastric cancer patients undergoing curative resection. Material and methods A retrospective study was conducted including resectable gastric cancer patients. According to the time-dependent receiver operating characteristics (ROC) analysis, the optimal threshold for pretreatment LAR was 5.5. The Kaplan-Meier method, Cox regression univariate and multivariate analyses were used to analyze the prognostic factors for disease-free survival and overall survival (OS). Results The study cohort consisted of 81 patients, mean age was 60.2 ±13.8 (range, 29–87) years and 55 (67.9%) were male. The median OS time was 34.8 and 45 months in patients with LAR ≥ 5.5 (n = 50) and LAR < 5.5 (n = 31), respectively. Kaplan-Meier curves showed that with the increase in LAR there was reduced survival, but it was not statistically significant (p = 0.278). Multivariate analyses revealed that the positive lymph node ratio above 20% was an independent predictor in resectable gastric cancer patients (OR = 6.281, 95% CI: 1.135–34.767, p = 0.035). Conclusions With the increase in LAR survival in gastric cancer decreased, but it was not statistically significant. Studies involving a large patient series are needed.
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18
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Cheng L, Sami A, Ghosh B, Urban MW, Heinsinger NM, Liang SS, Smith GM, Wright MC, Li S, Lepore AC. LAR inhibitory peptide promotes recovery of diaphragm function and multiple forms of respiratory neural circuit plasticity after cervical spinal cord injury. Neurobiol Dis 2020; 147:105153. [PMID: 33127470 PMCID: PMC7726004 DOI: 10.1016/j.nbd.2020.105153] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 09/14/2020] [Accepted: 10/25/2020] [Indexed: 12/18/2022] Open
Abstract
Chondroitin sulfate proteoglycans (CSPGs), up-regulated in and around the lesion after traumatic spinal cord injury (SCI), are key extracellular matrix inhibitory molecules that limit axon growth and consequent recovery of function. CSPG-mediated inhibition occurs via interactions with axonal receptors, including leukocyte common antigen- related (LAR) phosphatase. We tested the effects of a novel LAR inhibitory peptide in rats after hemisection at cervical level 2, a SCI model in which bulbospinal inspiratory neural circuitry originating in the medullary rostral ventral respiratory group (rVRG) becomes disconnected from phrenic motor neuron (PhMN) targets in cervical spinal cord, resulting in persistent partial-to-complete diaphragm paralysis. LAR peptide was delivered by a soaked gelfoam, which was placed directly over the injury site immediately after C2 hemisection and replaced at 1 week post-injury. Axotomized rVRG axons originating in ipsilateral medulla or spared rVRG fibers originating in contralateral medulla were separately assessed by anterograde tracing via AAV2-mCherry injection into rVRG. At 8 weeks post-hemisection, LAR peptide significantly improved ipsilateral hemidiaphragm function, as assessed in vivo with electromyography recordings. LAR peptide promoted robust regeneration of ipsilateral-originating rVRG axons into and through the lesion site and into intact caudal spinal cord to reach PhMNs located at C3-C5 levels. Furthermore, regenerating rVRG axons re-established putative monosynaptic connections with their PhMNs targets. In addition, LAR peptide stimulated robust sprouting of both modulatory serotonergic axons and contralateral-originating rVRG fibers within the PhMN pool ipsilateral/ caudal to the hemisection. Our study demonstrates that targeting LAR-based axon growth inhibition promotes multiple forms of respiratory neural circuit plasticity and provides a new peptide-based therapeutic strategy to ameliorate the devastating respiratory consequences of SCI.
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Affiliation(s)
- Lan Cheng
- Department of Neuroscience, Vickie and Jack Farber Institute for Neuroscience, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA 19107, United States of America
| | - Armin Sami
- Department of Neuroscience, Vickie and Jack Farber Institute for Neuroscience, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA 19107, United States of America
| | - Biswarup Ghosh
- Department of Neuroscience, Vickie and Jack Farber Institute for Neuroscience, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA 19107, United States of America
| | - Mark W Urban
- Department of Neuroscience, Vickie and Jack Farber Institute for Neuroscience, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA 19107, United States of America
| | - Nicolette M Heinsinger
- Department of Neuroscience, Vickie and Jack Farber Institute for Neuroscience, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA 19107, United States of America
| | - Sophia S Liang
- Department of Neuroscience, Vickie and Jack Farber Institute for Neuroscience, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA 19107, United States of America
| | - George M Smith
- Department of Neuroscience, Shriners Hospitals for Pediatric Research Center, Temple University School of Medicine, 3500 North Broad Street, Philadelphia, PA 19140-5104, United States of America
| | - Megan C Wright
- Department of Biology, Arcadia University, Glenside, PA 19038, United States of America
| | - Shuxin Li
- Department of Anatomy and Cell Biology, Shriners Hospitals for Pediatric Research Center, Temple University School of Medicine, 3500 North Broad Street, Philadelphia, PA 19140-5104, United States of America
| | - Angelo C Lepore
- Department of Neuroscience, Vickie and Jack Farber Institute for Neuroscience, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA 19107, United States of America.
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Sami A, Selzer ME, Li S. Advances in the Signaling Pathways Downstream of Glial-Scar Axon Growth Inhibitors. Front Cell Neurosci 2020; 14:174. [PMID: 32714150 PMCID: PMC7346763 DOI: 10.3389/fncel.2020.00174] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Accepted: 05/22/2020] [Indexed: 12/15/2022] Open
Abstract
Axon growth inhibitors generated by reactive glial scars play an important role in failure of axon regeneration after CNS injury in mature mammals. Among the inhibitory factors, chondroitin sulfate proteoglycans (CSPGs) are potent suppressors of axon regeneration and are important molecular targets for designing effective therapies for traumatic brain injury or spinal cord injury (SCI). CSPGs bind with high affinity to several transmembrane receptors, including two members of the leukocyte common antigen related (LAR) subfamily of receptor protein tyrosine phosphatases (RPTPs). Recent studies demonstrate that multiple intracellular signaling pathways downstream of these two RPTPs mediate the growth-inhibitory actions of CSPGs. A better understanding of these signaling pathways may facilitate development of new and effective therapies for CNS disorders characterized by axonal disconnections. This review will focus on recent advances in the downstream signaling pathways of scar-mediated inhibition and their potential as the molecular targets for CNS repair.
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Affiliation(s)
- Armin Sami
- Shriners Hospitals Pediatric Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States.,Department of Anatomy and Cell Biology, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Michael E Selzer
- Shriners Hospitals Pediatric Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States.,Department of Neurology, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Shuxin Li
- Shriners Hospitals Pediatric Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States.,Department of Anatomy and Cell Biology, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
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Chao PJ, Tsai IH, Huang CC, Lin CH, Shieh CS, Hsieh YW, Yang PY, Lee HF, Lee TF. Radiation-Induced Secondary Cancer Risk Assessment in Patients With Lung Cancer After Stereotactic Body Radiotherapy Using the CyberKnife M6 System With Lung-Optimized Treatment. Front Bioeng Biotechnol 2020; 8:306. [PMID: 32457880 PMCID: PMC7223476 DOI: 10.3389/fbioe.2020.00306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 03/20/2020] [Indexed: 12/21/2022] Open
Abstract
Background To evaluate the lifetime secondary cancer risk (SCR) of stereotactic body radiotherapy (SBRT) using the CyberKnife (CK) M6 system with a lung-optimized treatment (LOT) module for lung cancer patients. Methods We retrospectively enrolled 11 lung cancer patients curatively treated with SBRT using the CK M6 robotic radiosurgery system. The planning treatment volume (PTV) and common organs at risk (OARs) for SCR analysis included the spinal cord, total lung, and healthy normal lung tissue (total lung volume - PTV). Schneider’s full model was used to calculate SCR according to the concept of organ equivalent dose (OED). Results CK-LOT-SBRT delivers precisely targeted radiation doses to lung cancers and achieves good PTV coverage and conformal dose distribution, thus posing limited SCR to surrounding tissues. The three OARs had similar risk equivalent dose (RED) values among four different models. However, for the PTV, differences in RED values were observed among the models. The cumulative excess absolute risk (EAR) value for the normal lung, spinal cord, and PTV was 70.47 (per 10,000 person-years). Schneider’s Lnt model seemed to overestimate the EAR/lifetime attributable risk (LAR). Conclusion For lung cancer patients treated with CK-LOT optimized with the Monte Carlo algorithm, the SCR might be lower. Younger patients had a greater SCR, although the dose–response relationship seemed be non-linear for the investigated organs, especially with respect to the PTV. Despite the etiological association, the SCR after CK-LOT-SBRT for carcinoma and sarcoma, is low, but not equal to zero. Further research is required to understand and to show the lung SBRT SCR comparisons and differences across different modalities with motion management strategies.
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Affiliation(s)
- Pei-Ju Chao
- Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan.,Department of Radiation Oncology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - I-Hsing Tsai
- Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan
| | - Chun-Chieh Huang
- Department of Radiation Oncology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chih-Hsueh Lin
- Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan
| | - Chin-Shiuh Shieh
- Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan
| | - Yang-Wei Hsieh
- Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan.,Department of Radiation Oncology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Pei-Ying Yang
- Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan.,Department of Radiation Oncology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Hsiao-Fei Lee
- Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan.,Department of Radiation Oncology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Tsair-Fwu Lee
- Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan.,Department of Radiation Oncology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.,Biomedical Engineering, Kaohsiung Medical University, Kaohsiung, Taiwan
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21
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Paull JO, Parsacandola SA, Graham A, Hota S, Pudalov N, Obias V. The impact of the AirSeal ® valve-less trocar system in robotic colorectal surgery: a single-surgeon retrospective review. J Robot Surg 2020; 15:87-92. [PMID: 32333365 DOI: 10.1007/s11701-020-01071-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 03/20/2020] [Indexed: 11/26/2022]
Abstract
BACKGROUND Traditional trocar systems suffer from several innate flaws due to their silicone seal design. The AirSeal® is a valve-less trocar system that overcomes these flaws by utilizing a system of laminar flow and CO2 recirculation. The purpose of this paper is to examine the effect of the AirSeal® versus a traditional trocar system in operative time, EBL and post-operative complications. To the best of our knowledge, this is the first analysis of this system in robotic colorectal surgery. METHODS A single surgeon's database was reviewed and all LAR and right hemicolectomy robotic cases from 2014-2015 and 2017-2018 were included for analysis. Patient demographic information was evaluated and primary outcomes examined were operative time, EBL, post-operative complications and hospital LOS. RESULTS Ninety four patients were identified in the LAR cohort and 56 patients were identified in the right hemicolectomy cohort. Mean operative time for LAR was 293 ± 91.6 min in 2014-2015 and 232 ± 74.6 min in 2017-2018 (p = 0.001); however, this significant difference was not seen between right hemicolectomies. Mean EBL for LAR was 209 ± 189 cc in 2014-2015 and 150 ± 173.9 cc in 2017-2018 (p = 0.05); again, this significant difference was not appreciated for right hemicolectomies. There was no statistically significant difference in rates of wound infections, pneumonia, post-operative pneumonia, DVT/PE, intra-abdominal/pelvic abscesses, or unplanned 30-day readmission rate between 2014-2015 and 2017-2018. Length of stay was reduced in both populations between 2014-2015 and 2017-2018; however, it neither reached statistical significance. CONCLUSION In patients undergoing low anterior resections, the AirSeal® trocar system demonstrated a statistically significant reduction in mean operative time and EBL compared to the traditional trocar system. There was also a trend towards decreased length of stay and post-operative complications with AirSeal® use in low anterior resections and right hemicolectomies. In patients undergoing distal colorectal procedures, the AirSeal® trocar system should be considered.
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Affiliation(s)
- Jessie Osborne Paull
- Walter Reed National Military Medical Center, C/O George Washington University Hospital, 22nd and I Street, NW, 9th Floor Suite 6B, Washington, DC, 20037, USA
| | - Salvatore A Parsacandola
- Walter Reed National Military Medical Center, C/O George Washington University Hospital, 22nd and I Street, NW, 9th Floor Suite 6B, Washington, DC, 20037, USA.
| | - Ada Graham
- Department of Colorectal Surgery, George Washington University Hospital, Washington, USA
| | - Salini Hota
- Eastern Virginia Medical School, Norfolk, VA, USA
| | - Natalie Pudalov
- George Washington University School of Medicine and Health Sciences, Washington, USA
| | - Vincent Obias
- Department of Colorectal Surgery, George Washington University Hospital, Washington, USA
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22
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Zhang L, Wang P, Ma X, Zhao W, Li M, Yao S, Liu Y, Gao L, Xia T. Exploration of the Substrate Diversity of Leucoanthocyanidin Reductases. J Agric Food Chem 2020; 68:3903-3911. [PMID: 32141742 DOI: 10.1021/acs.jafc.9b06353] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Proanthocyanidins (PAs) are mainly composed of epicatechin (EC) or catechin (C) subunits. C-type catechins (C and GC) are generally considered to be catalyzed by leucocyanidin reductase (LAR). In this study, we re-evaluated the function of LAR. LcLAR1 was isolated from Lotus corniculatus, which is rich in C-type catechins. Overexpression of LcLAR1 in tobacco resulted in a significantly increased content of EC and EC-glucoside. Overexpression of LcLAR1 in Arabidopsis thaliana promoted the accumulation of soluble PAs, including EC, PA dimers, and PA trimers. However, in the transgenic ans mutant overexpressing LcLAR1, the contents of C and C-glucoside were increased. In addition, overexpression of LcLAR1 in L. corniculatus resulted in a significant increase of C levels. Taken together, the products of LcLAR1 depended on the substrates, which revealed the substrate diversity of LcLAR1. Our study provides new insights into the flavonoid pathway, especially the role of LAR.
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Affiliation(s)
- Lingjie Zhang
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Peiqiang Wang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, China
- College of Horticulture, Qingdao Agricultural University, Qingdao 266109, China
| | - Xue Ma
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Wenyan Zhao
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Ming Li
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Shengbo Yao
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Yajun Liu
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Liping Gao
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Tao Xia
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui 230036, China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui 230036, China
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23
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Huerta S, Meier J, Emuakhagbon VS, Favela J, Argo M, Polanco PM, Augustine MM, Pham T. A comparative analysis of outcomes of open, laparoscopic, and robotic elective (procto-) colectomies for benign and malignant disease. J Robot Surg 2020; 15:53-62. [PMID: 32297148 DOI: 10.1007/s11701-020-01069-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 03/16/2020] [Indexed: 01/17/2023]
Abstract
Laparoscopy has emerged as a common alternative to the open approach for colorectal operations. Robotic surgery has many advantages, but cost and outcomes are an area of study. There are no randomized-controlled trials of all techniques. The present study evaluated a cohort of veterans undergoing (procto-) colectomy for benign or malignant colorectal disease. This is a single-institution retrospective review. We compared open, laparoscopic, and robotic colectomies. The primary outcome was 30-day mortality. The secondary endpoints included morbidity, operative times, estimated blood loss (EBL), length of stay (LOS), conversion rate, and the learning curve (LC). Subgroup analyses were undertaken for: (1) right hemicolectomies (RHC) and (2) by specific surgeons most familiar with each approach. The cohort included 390 patients (men = 95%, White = 70.8%, BMI = 29.3 ± 6.4 kg/m2, age = 63.7 ± 10.2 years) undergoing (open = 117, laparoscopic = 168, and robotic = 105), colorectal operations for colorectal adenocarcinoma (52.8%) and benign disease. Thirty-day morbidity was similar across all techniques (open = 46.2%, laparoscopic = 42.9%, and robotic = 38.1%; NS). EBL and LOS were decreased with minimally invasive techniques compared to open. Operative time was longer in robotic, but equalized to laparoscopic after 90 cases. The learning curve was reduced to 20 when performed by the surgeon most familiar with the robot. EBL and operative time independently predicted complications for the entire cohort. The best technique for colorectal operations rests on the surgeon's experience, but minimally invasive techniques are gaining momentum over open colectomies. Robotic colectomy is emerging as a non-inferior approach to laparoscopy in terms of outcomes, while maintaining all its technical advantages.
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Affiliation(s)
- Sergio Huerta
- Department of Surgery, VA North Texas Health Care System, University of Texas Southwestern, 4500 S. Lancaster Road, Dallas, TX, 75216, USA. .,Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA.
| | - Jennie Meier
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Valerie-Sue Emuakhagbon
- Department of Surgery, VA North Texas Health Care System, University of Texas Southwestern, 4500 S. Lancaster Road, Dallas, TX, 75216, USA.,Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Juan Favela
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Madison Argo
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Patricio M Polanco
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Mathew M Augustine
- Department of Surgery, VA North Texas Health Care System, University of Texas Southwestern, 4500 S. Lancaster Road, Dallas, TX, 75216, USA.,Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Thai Pham
- Department of Surgery, VA North Texas Health Care System, University of Texas Southwestern, 4500 S. Lancaster Road, Dallas, TX, 75216, USA.,Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
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Zhou L, Ma YC, Tang X, Li WY, Ma Y, Wang RL. Identification of the potential dual inhibitor of protein tyrosine phosphatase sigma and leukocyte common antigen-related phosphatase by virtual screen, molecu lar dynamic simulations and post-analysis. J Biomol Struct Dyn 2019; 39:45-62. [PMID: 31842717 DOI: 10.1080/07391102.2019.1705913] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Owing to their inhibitory role in regulating oligodendrocyte differentiation and apoptosis, protein tyrosine phosphatase sigma (PTPσ) and leukocyte common antigen-related phosphatase (LAR) play a crucial potential role in treating spinal cord injury (SCI) disease. In this research, the computer aided drug design (CADD) methods were applied to discover the potential dual-target drug involving virtual screen, molecular docking and molecular dynamic simulation. Initially, the top 20 compounds with higher docking score than the positive controls (ZINC13749892, ZINC14516161) were virtually screened out from NCI and ZINC databases, and then were submitted in ADMET to predict their drug properties. Among these potential compounds, ZINC72417086 showed a higher docking score and satisfied Lipinski's rule of five. In addition, the post-analysis demonstrated that when ZINC72417086 bound to PTPσ and LAR, it could stable proteins conformations and destroy the residues interactions between P-loop and other loop regions in active pocket. Meanwhile, residue ARG1595 and ARG1528 could play a crucial role in in the inhibition of PTPσ and LAR, respectively. This research offered a novel approach for rapid discovery of dual-target leads compounds to treat SCI.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Liang Zhou
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin, China
| | - Yang-Chun Ma
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin, China
| | - Xue Tang
- Tasly Research Institute, Tasly Holding Group Co., Ltd, Tianjin, China
| | - Wei-Ya Li
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin, China
| | - Ying Ma
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin, China
| | - Run-Ling Wang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin, China
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Tsilochristou O, Kyriakakou M, Manolaraki I, Lakoumentas J, Tiligada E, Maragkoudakis P, Douladiris N, Papadopoulos NG. Detection of local allergic rhinitis in children with chronic, difficult-to-treat, non-allergic rhinitis using multiple nasal provocation tests. Pediatr Allergy Immunol 2019; 30:296-304. [PMID: 30685887 DOI: 10.1111/pai.13021] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 01/09/2019] [Accepted: 01/10/2019] [Indexed: 12/24/2022]
Abstract
BACKGROUND There is little evidence on the incidence and characteristics of local allergic rhinitis (LAR) in children. Most studies have included subjects with perennial rhinitis only, and results are based on the investigation of no more than three allergens per study. Our aim was to determine the proportion of children with LAR amongst children with chronic, difficult-to-treat, perennial or seasonal, rhinitis but no evidence of sensitization to aeroallergens, or other alternative diagnosis. METHODS We performed multiple nasal provocation tests (M-NPTs) with four locally relevant aeroallergens (Phleum pratense, Olea europea, Alternaria alternata, and Dermatophagoides pteronyssinus) in children with absence of aeroallergen sensitization, seen during a calendar year in a specialized rhinitis clinic. We additionally performed single NPT to children with allergic rhinitis (AR; positive control group). The result of the NPT was based on symptoms and acoustic rhinometry. Identification of nasal hyper-reactivity (NHR) triggers was through a questionnaire. RESULTS Local allergic rhinitis was confirmed in 29.2% (7/24) of the negative SPT/blood testing population. All but one of the children reacted to one allergen and one to two. All AR children had positive single NPT with results similar to the LAR. There were no differences in age at examination and rhinitis onset, gender distribution, family atopy, and past or current environment of residency, while the prevalence of reported NHR triggers was comparable amongst the three groups. CONCLUSION This is the first pediatric study where the seasonal or perennial rhinitis population was thoroughly tested for LAR against four aeroallergens. LAR is present in a considerable proportion of children with chronic, difficult-to-treat rhinitis and no sensitization to aeroallergens, and therefore, the performance of NPT should be strongly considered in these cases. There were no distinct clinical characteristics between LAR, AR, and non-allergic rhinitis in children.
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Affiliation(s)
- Olympia Tsilochristou
- Peter Gorer Department of Immunobiology, School of Immunology & Microbial Sciences, King's College London, London, UK.,Allergy Department, 2nd Pediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece
| | - Marialena Kyriakakou
- Allergy Department, 2nd Pediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece
| | - Ioanna Manolaraki
- Allergy Department, 2nd Pediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece
| | - John Lakoumentas
- Allergy Department, 2nd Pediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece
| | - Ekaterini Tiligada
- Department of Pharmacology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Pavlos Maragkoudakis
- Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Nikolaos Douladiris
- Allergy Department, 2nd Pediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece
| | - Nikolaos G Papadopoulos
- Allergy Department, 2nd Pediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece.,Division of Infection, Immunity & Respiratory Medicine, University of Manchester, Manchester, UK
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Ammann EM, Goldstein LJ, Nagle D, Wei D, Johnston SS. A dual-perspective analysis of the hospital and payer-borne burdens of selected in-hospital surgical complications in low anterior resection for colorectal cancer. Hosp Pract (1995) 2019; 47:80-87. [PMID: 30632418 DOI: 10.1080/21548331.2019.1568718] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVES The economic burden of surgical complications is borne in distinctly different ways by hospitals and payers. This study quantified the incidence and economic burden - from both the hospital and payer perspective - of selected major colorectal surgery complications in patients undergoing low anterior resection (LAR) for colorectal cancer. METHODS Retrospective, observational study of patient undergoing LAR for colorectal cancer between 1/1/2010 and 7/1/2015. Analyses were replicated in two large healthcare administrative databases: Premier (hospital discharge and billing data; hospital perspective) and Optum (insurance claims data; payer perspective). Multivariable analyses evaluated the association between infection (surgical site or bloodstream), anastomotic leak, and bleeding complications and the following outcomes: hospital length of stay (LOS), non-home discharge, 90-day all-cause readmission, index admission costs to the hospital, index admission payer expenditures, and index admission +90-day post-discharge payer expenditures. RESULTS 9,738 eligible LAR patients were included (7,479 in Premier; 2,259 in Optum). Overall, the incidences of infection, anastomotic leak, and bleeding complications were 6.4%, 10.6%, and 10.9%, respectively, during the index hospitalization. Each complication was associated with statistically significant longer LOS, higher risk of non-home discharge, higher risk of 90-day readmission, greater costs to the hospital, and higher payer expenditures. CONCLUSIONS In-hospital infection, anastomotic leak, and bleeding were associated with a substantial economic burden, for both hospitals and payers, in patients undergoing LAR for colorectal cancer. This study provides information which may be used to quantify the potential economic value and impact of innovations in surgical care and delivery that reduce the incidence and burden of these complications.
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Affiliation(s)
- Eric M Ammann
- a Epidemiology, Medical Devices , Johnson & Johnson , New Brunswick , NJ , USA
| | - Laura J Goldstein
- b Franchise Health Economics and Market Access , Ethicon, Johnson & Johnson , Toronto , ON , Canada
| | - Deborah Nagle
- c Medical Affairs , Ethicon, Johnson & Johnson , Somerville , NJ , USA
| | - David Wei
- a Epidemiology, Medical Devices , Johnson & Johnson , New Brunswick , NJ , USA
| | - Stephen S Johnston
- a Epidemiology, Medical Devices , Johnson & Johnson , New Brunswick , NJ , USA
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Abstract
The presynaptic active zone, composed of evolutionarily conserved protein complexes, is a specialized area that serves to orchestrate precise and efficient neurotransmitter release by organizing various presynaptic proteins involved in mediating docking and priming of synaptic vesicles, recruiting voltage-gated calcium channels, and modulating presynaptic nerve terminals with aligned postsynaptic structures. Among membrane proteins localized to active zone, presynaptic neurexins and LAR-RPTPs (leukocyte common antigen-related receptor tyrosine phosphatase) have emerged as hubs that orchestrate both shared and distinct extracellular synaptic adhesion pathways. In this chapter, we discuss intracellular signaling cascades involved in recruiting various intracellular proteins at both excitatory and inhibitory synaptic sites. In particular, we highlight recent studies on key active zone proteins that physically and functionally link these cascades with neurexins and LAR-RPTPs in both vertebrate and invertebrate model systems. These studies allow us to build a general, universal view of how presynaptic active zones operate together with postsynaptic structures in neural circuits.
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Affiliation(s)
- Kyung Ah Han
- Department of Brain and Cognitive Sciences, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, Korea
| | - Ji Won Um
- Department of Brain and Cognitive Sciences, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, Korea
| | - Jaewon Ko
- Department of Brain and Cognitive Sciences, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, Korea.
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Gan W, Zhang MX, Wang JX, Fu YP, Huang JL, Yi Y, Jing CY, Fan J, Zhou J, Qiu SJ. Prognostic impact of lactic dehydrogenase to albumin ratio in hepatocellu lar carcinoma patients with Child-Pugh I who underwent curative resection: a prognostic nomogram study. Cancer Manag Res 2018; 10:5383-5394. [PMID: 30464634 PMCID: PMC6225921 DOI: 10.2147/cmar.s176317] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Background Radical resection is the treatment of choice for hepatocellular carcinoma (HCC). However, even with this treatment, HCC prognosis and the efficacy of current predictive models for such patients remain unsatisfactory. Here, we describe an accurate and easy-to-use prognostic index for patients with HCC who have undergone curative resection. Methods The study population comprised of 1,041 patients with HCC who underwent curative resection at Zhongshan Hospital. This population was reduced to 768 patients who were treated in 2012 analyzed as the training cohort and 273 patients treated in 2007 who were used as a validation cohort. Results The lactic dehydrogenase to albumin ratio (LAR) was identified as a significant prognostic index for both overall survival and recurrence-free survival in two independent cohorts. The optimal cutoff value for LAR was determined to be 5.5. The C-index of LAR was superior to other inflammatory scores and serum parameters. This biomarker was also shown to be a stable predictive index in the validation cohort. The new nomogram combining LAR with the Barcelona Clinic Liver Cancer staging system had an improved ability to discriminate overall survival and recurrence-free survival. Nomogram predictions were consistent with observations based on calibration and decisive curve analysis in both independent cohorts. Conclusion LAR is a novel, convenient, reliable, and accurate prognostic predictor in patients with HCC undergoing curative resection. Our results suggest the recommendation of LAR to be used in routine clinical practice.
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Affiliation(s)
- Wei Gan
- Department of Liver Surgery and Liver Transplantation, Liver Cancer Institute, Zhongshan Hospital and Shanghai Medical School, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People's Republic of China,
| | - Mei-Xia Zhang
- Department of Liver Surgery and Liver Transplantation, Liver Cancer Institute, Zhongshan Hospital and Shanghai Medical School, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People's Republic of China, .,Biomedical Research Center, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China,
| | - Jia-Xing Wang
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Yi-Peng Fu
- Department of Liver Surgery and Liver Transplantation, Liver Cancer Institute, Zhongshan Hospital and Shanghai Medical School, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People's Republic of China,
| | - Jin-Long Huang
- Department of Liver Surgery and Liver Transplantation, Liver Cancer Institute, Zhongshan Hospital and Shanghai Medical School, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People's Republic of China,
| | - Yong Yi
- Department of Liver Surgery and Liver Transplantation, Liver Cancer Institute, Zhongshan Hospital and Shanghai Medical School, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People's Republic of China,
| | - Chu-Yu Jing
- Department of Liver Surgery and Liver Transplantation, Liver Cancer Institute, Zhongshan Hospital and Shanghai Medical School, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People's Republic of China,
| | - Jia Fan
- Department of Liver Surgery and Liver Transplantation, Liver Cancer Institute, Zhongshan Hospital and Shanghai Medical School, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People's Republic of China,
| | - Jian Zhou
- Department of Liver Surgery and Liver Transplantation, Liver Cancer Institute, Zhongshan Hospital and Shanghai Medical School, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People's Republic of China,
| | - Shuang-Jian Qiu
- Department of Liver Surgery and Liver Transplantation, Liver Cancer Institute, Zhongshan Hospital and Shanghai Medical School, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People's Republic of China, .,Biomedical Research Center, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China,
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Cui B, Lei S, Liu K, Yao H. Robotic low anterior resection plus transanal natural orifice specimen extraction in a patient with situs inversus totalis. BMC Surg 2018; 18:64. [PMID: 30126461 PMCID: PMC6102915 DOI: 10.1186/s12893-018-0394-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 08/13/2018] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Situs inversus totalis (SIT) refers to an unusual condition involving reversal of abdominal and thoracic viscera, with an incidence rate of 1/5000-20,000 adults. Minimally invasive surgeries for SIT patients are technically challenging, while the surgical experience for SIT patients is quite limited. CASE PRESENTATION A 61-year-old man, previously diagnosed as SIT, came to our hospital for 6 months history of hematochezia and altered bowel habit. A diagnosis of rectal cancer was made in view of colonoscopic biopsy which confirmed an irregular circumferential lump of well differentiated adenocarcinoma at 10 cm from the anal verge. The computed tomography contrast-enhanced (thorax + abdomen + pelvis) scan revealed a total transposition of abdominal and thoracic organs and an enhanced eccentric mass of rectal but with no evidence of distant metastasis. Robotic low anterior resection (LAR) plus transanal natural orifice specimen extraction (NOSE) was performed after obtaining informed consent. The procedure was performed successfully and the patient convalesced nicely without any complications. The postoperative pathological diagnosis revealed a 4x4x0.6 cm3 moderately differentiated adenocarcinoma and circumferential clearance. CONCLUSIONS Robotic LAR plus transanal NOSE for rectal cancer patients with SIT can be performed safely and may be an effective approach in contrast to open or laparoscopic approach, despite the unconventional anatomy.
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Affiliation(s)
- Beibei Cui
- Department of Gastrointestinal Surgery, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, Hunan, 410011, People's Republic of China
| | - Sanlin Lei
- Department of Gastrointestinal Surgery, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, Hunan, 410011, People's Republic of China
| | - Kuijie Liu
- Department of Gastrointestinal Surgery, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, Hunan, 410011, People's Republic of China
| | - Hongliang Yao
- Department of Gastrointestinal Surgery, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, Hunan, 410011, People's Republic of China.
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Sakthivel V, Mani GK, Mani S, Boopathy R. Radiation-Induced Second Cancer Risk from External Beam Photon Radiotherapy for Head and Neck Cancer: Impact on in-Field and Out-of-Field Organs. Asian Pac J Cancer Prev 2017; 18:1897-1903. [PMID: 28749618 PMCID: PMC5648396 DOI: 10.22034/apjcp.2017.18.7.1897] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
The purpose of this paper is to provide data on development of second primary cancers within or adjacent to tissue
irradiated in the treatment of primary head and neck cancers using different techniques and modalities. Materials and
methods: We selected five patients with HandN tumors located in base of the tongue for risk assessment. In order to
examine the impact of choices of various planning techniques, numbers of beams and beam energy used in treatment
plans - 7 and 9 field Intensity modulated radiotherapy (IMRT) plans using 6MV and 10 MV beam energies and a 6MV
Volumetric modulated arc therapy (VMAT) plans were planned. Out-of-field measurements for secondary photon
doses for the treatment plans were measured using diode-dosimeters and solid water slabs. Differential dose-volume
histograms (DVH) for all 5 patients and 5 techniques, were exported and used to calculate organ equivalent dose (OAR),
excess absolute risk (EAR), and life-time attributable risk (LAR) for in-field organs. Results: For all treatment plans,
the DVH showed clinically acceptable values; adequate clinical target coverage and dose constraints were met for all
organs at risk. There was a clear advantage for the VMAT plan; it provided superior organ at risk (OAR) sparing and
adequate target coverage. VMAT has relatively low monitor units at 0.93±0.034 times 7F6. The average percentage
scattered to prescription doses for the five patients at 15, 30, 45, 60 and 75 cm from the isocenter were 0.9212 ± 0.115,
0.2621 ± 0.080, 0.1617 ± 0.057, 0.0936 ± 0.026, 0.0296 ± 0.014, for VMAT. Conclusion: Organ-specific LAR was
higher with VMAT compared to 7F6 for skin. 6-MV VMAT is an acceptable alternative to IMRT for HandN cancer
and offers advantages in terms of sparing adjacent OAR.
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Affiliation(s)
- Vasanthan Sakthivel
- Research and Development Centre, Bharathiar University, Coimbatore, India.,Advanced Medical Physics, Houston, Texas, United States.
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Nakamura F, Okada T, Shishikura M, Uetani N, Taniguchi M, Yagi T, Iwakura Y, Ohshima T, Goshima Y, Strittmatter SM. Protein Tyrosine Phosphatase δ Mediates the Sema3A-Induced Cortical Basal Dendritic Arborization through the Activation of Fyn Tyrosine Kinase. J Neurosci 2017; 37:7125-39. [PMID: 28637841 DOI: 10.1523/JNEUROSCI.2519-16.2017] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Leukocyte common antigen-related (LAR) class protein tyrosine phosphatases (PTPs) are critical for axonal guidance; however, their relation to specific guidance cues is poorly defined. We here show that PTP-3, a LAR homolog in Caenorhabditis elegans, is involved in axon guidance regulated by Semaphorin-2A-signaling. PTPδ, one of the vertebrate LAR class PTPs, participates in the Semaphorin-3A (Sema3A)-induced growth cone collapse response of primary cultured dorsal root ganglion neurons from Mus musculus embryos. In vivo, however, the contribution of PTPδ in Sema3A-regualted axon guidance was minimal. Instead, PTPδ played a major role in Sema3A-dependent cortical dendritic growth. Ptpδ-/- and Sema3a-/- mutant mice exhibited poor arborization of basal dendrites of cortical layer V neurons. This phenotype was observed in both male and female mutants. The double-heterozygous mutants, Ptpδ+/-; Sema3a+/-, also showed a similar phenotype, indicating the genetic interaction. In Ptpδ-/- brains, Fyn and Src kinases were hyperphosphorylated at their C-terminal Tyr527 residues. Sema3A-stimulation induced dephosphorylation of Tyr527 in the dendrites of wild-type cortical neurons but not of Ptpδ-/- Arborization of cortical basal dendrites was reduced in Fyn-/- as well as in Ptpδ+/-; Fyn+/- double-heterozygous mutants. Collectively, PTPδ mediates Sema3A-signaling through the activation of Fyn by C-terminal dephosphorylation.SIGNIFICANCE STATEMENT The relation of leukocyte common antigen-related (LAR) class protein tyrosine phosphatases (PTPs) and specific axon guidance cues is poorly defined. We show that PTP-3, a LAR homolog in Caenorhabditis elegans, participates in Sema2A-regulated axon guidance. PTPδ, a member of vertebrate LAR class PTPs, is involved in Sema3A-regulated cortical dendritic growth. In Sema3A signaling, PTPδ activates Fyn and Src kinases by dephosphorylating their C-terminal Tyr residues. This is the first evidence showing that LAR class PTPs participate in Semaphorin signaling in vivo.
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Abstract
Consenting to participate in a clinical research study after being properly and correctly informed upholds the basic ethical principle of “autonomy” in human research. The informed consent is a process by which the physician sensitizes the patient about the nature, procedures, risks benefits, treatment schedules, etc of the study in a language that is non-technical and understandable by the study participant. Informed consent document (ICD) has got two parts: the ‘Subject Information Sheet’ and the ‘Informed Consent Form’ (ICF); and they have to be approved by the Institutional Ethics Committee (IEC) before administration. Consent should be obtained without any coercion. In case of a situation where a participant is not able to give informed consent (e.g. unconscious, minor or those suffering from severe mental illness or disability) or is illiterate, it has be obtained from a legally acceptable representative (LAR). If the participant or LAR is unable to read/write, then an impartial witness should be present during the entire informed consent process and must append his/her signatures to the consent form. For children < 7 years, verbal consent is essential and for mature minors (age group 7 to 18 years) informed assent should be obtained.
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Affiliation(s)
- Amrita Sil
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, West Bengal, India.,Member of Institutional Ethics Committee, Institute of Neurosciences, Kolkata, West Bengal, India.,Member of Dermatology Clinical Trials Special Interest Group, IADVL Academy of Dermatology, India
| | - Nilay Kanti Das
- Department of Dermatology, Bankura Sammilani Medical College, Bankura, West Bengal, India.,Member of Institutional Ethics Committee of Human Research, Medical College, Kolkata, West Bengal, India.,Coordinator of Dermatology Clinical Trials Special Interest Group, IADVL Academy of Dermatology, India
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Abstract
Leukocyte common antigen-related receptor tyrosine phosphatases (LAR-RPTPs) have emerged as key players that organize various aspects of neuronal development, including axon guidance, neurite extension, and synapse formation and function. Recent research has highlighted the roles of LAR-RPTPs at neuronal synapses in mediating distinct synaptic adhesion pathways through interactions with a host of extracellular ligands and in governing a variety of intracellular signaling cascades through binding to various scaffolds and signaling proteins. In this chapter, we review and update current research progress on the extracellular ligands of LAR-RPTPs, regulation of their extracellular interactions by alternative splicing and heparan sulfates, and their intracellular signaling machineries. In particular, we review structural insights on complexes of LAR-RPTPs with their various ligands. These studies lend support to general molecular mechanisms underlying LAR-RPTP-mediated synaptic adhesion and signaling pathways.
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Affiliation(s)
- K A Han
- Department of Physiology and BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - S Jeon
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - J W Um
- Department of Physiology and BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - J Ko
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea.
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Kuban-Jankowska A, Gorska M, Jaremko L, Jaremko M, Tuszynski JA, Wozniak M. The physiological concentration of ferrous iron (II) alters the inhibitory effect of hydrogen peroxide on CD45, LAR and PTP1B phosphatases. Biometals 2015; 28:975-86. [PMID: 26407665 PMCID: PMC4635172 DOI: 10.1007/s10534-015-9882-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Accepted: 09/22/2015] [Indexed: 11/27/2022]
Abstract
Hydrogen peroxide is an important regulator of protein tyrosine phosphatase activity via reversible oxidation. However, the role of iron in this reaction has not been yet elucidated. Here we compare the influence of hydrogen peroxide and the ferrous iron (reagent for Fenton reaction) on the enzymatic activity of recombinant CD45, LAR, PTP1B phosphatases and cellular CD45 in Jurkat cells. The obtained results show that ferrous iron (II) is potent inhibitor of CD45, LAR and PTP1B, but the inhibitory effect is concentration dependent. We found that the higher concentrations of ferrous iron (II) increase the inactivation of CD45, LAR and PTP1B phosphatase caused by hydrogen peroxide, but the addition of the physiological concentration (500 nM) of ferrous iron (II) has even a slightly preventive effect on the phosphatase activity against hydrogen peroxide.
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Affiliation(s)
| | - Magdalena Gorska
- Department of Medical Chemistry, Medical University of Gdansk, Gdansk, Poland
| | - Lukasz Jaremko
- Max Planck Institute for Biophysical Chemistry and German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Mariusz Jaremko
- Department of Medical Chemistry, Medical University of Gdansk, Gdansk, Poland.,Department of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | | | - Michal Wozniak
- Department of Medical Chemistry, Medical University of Gdansk, Gdansk, Poland
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35
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Abstract
Bacteria of the genera Rickettsia and Orientia (family rickettsiaceae, order rickettsiales) cause rickettsioses worldwide, and are transmitted by lice, fleas, ticks and mites. In Europe, only Rickettsia spp. cause rickettsioses. With improvement of hygiene, the risk of louse-borne rickettsiosis (epidemic typhus) is low in Europe. Nevertheless, recrudescent form of Rickettsia prowazekii infection persists. There could be an epidemic typhus outbreak if a body lice epidemic occurs under unfavorable sanitary conditions. In Europe, endemic typhus or Rickettsia typhi infection, transmitted by rats and fleas, causes febrile illness. At the beginning of this century, flea-borne spotted fever cases caused by Rickettsia felis were diagnosed. Flea-borne rickettsiosis should be suspected after flea bites if fever, with or without rash, is developed. Tick-borne rickettsioses are the main source of rickettsia infections in Europe. Apart from Rickettsia conorii, the Mediterranean Spotted Fever (MSF) agent, other Rickettsia spp. cause MSF-like: Rickettsia helvetica, Rickettsia monacensis, Rickettsia massiliae or Rickettsia aeschlimannii. In the 1990s, two 'new' rickettsioses were diagnosed: Lymphangitis Associated Rickettsiosis (LAR) caused by Rickettsia sibirica mongolitimonae, and Tick-Borne Lymphadenopathy/Dermacentor-Borne-Necrosis-Erythema-Lymphadenopathy/Scalp Eschar Neck Lymphadenopathy (TIBOLA/DEBONEL/SENLAT), caused by Rickettsia slovaca, Candidatus Rickettsia rioja and Rickettsia raoultii. Lastly, European reports about mite-borne rickettsiosis are scarce.
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Affiliation(s)
- Aránzazu Portillo
- Infectious Diseases Department, Hospital San Pedro-CIBIR, Logroño, Spain
| | - Sonia Santibáñez
- Infectious Diseases Department, Hospital San Pedro-CIBIR, Logroño, Spain
| | | | - Ana M Palomar
- Infectious Diseases Department, Hospital San Pedro-CIBIR, Logroño, Spain
| | - José A Oteo
- Infectious Diseases Department, Hospital San Pedro-CIBIR, Logroño, Spain.
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Dyck SM, Karimi-Abdolrezaee S. Chondroitin sulfate proteoglycans: Key modulators in the developing and pathologic central nervous system. Exp Neurol 2015; 269:169-87. [PMID: 25900055 DOI: 10.1016/j.expneurol.2015.04.006] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 04/11/2015] [Accepted: 04/14/2015] [Indexed: 12/15/2022]
Abstract
Chondroitin Sulfate Proteoglycans (CSPGs) are a major component of the extracellular matrix in the central nervous system (CNS) and play critical role in the development and pathophysiology of the brain and spinal cord. Developmentally, CSPGs provide guidance cues for growth cones and contribute to the formation of neuronal boundaries in the developing CNS. Their presence in perineuronal nets plays a crucial role in the maturation of synapses and closure of critical periods by limiting synaptic plasticity. Following injury to the CNS, CSPGs are dramatically upregulated by reactive glia which form a glial scar around the lesion site. Increased level of CSPGs is a hallmark of all CNS injuries and has been shown to limit axonal plasticity, regeneration, remyelination, and conduction after injury. Additionally, CSPGs create a non-permissive milieu for cell replacement activities by limiting cell migration, survival and differentiation. Mounting evidence is currently shedding light on the potential benefits of manipulating CSPGs in combination with other therapeutic strategies to promote spinal cord repair and regeneration. Moreover, the recent discovery of multiple receptors for CSPGs provides new therapeutic targets for targeted interventions in blocking the inhibitory properties of CSPGs following injury. Here, we will provide an in depth discussion on the impact of CSPGs in normal and pathological CNS. We will also review the recent preclinical therapies that have been developed to target CSPGs in the injured CNS.
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Affiliation(s)
- Scott M Dyck
- Regenerative Medicine Program, Department of Physiology and the Spinal Cord Research Centre, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Soheila Karimi-Abdolrezaee
- Regenerative Medicine Program, Department of Physiology and the Spinal Cord Research Centre, University of Manitoba, Winnipeg, Manitoba, Canada.
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37
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Kawagoe Y, Shiraishi S, Kondo H, Yamamoto S, Aoki Y, Suzuki S. Cyclic lipopeptide iturin A structure-dependently induces defense response in Arabidopsis plants by activating SA and JA signaling pathways. Biochem Biophys Res Commun 2015; 460:1015-20. [PMID: 25842204 DOI: 10.1016/j.bbrc.2015.03.143] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 03/25/2015] [Indexed: 11/30/2022]
Abstract
Iturin A is the most well studied antifungal cyclic lipopeptide produced by Bacillus species that are frequently utilized as biological control agents. Iturin A not only shows strong antifungal activity against phytopathogens but also induces defense response in plants, thereby reducing plant disease severity. Here we report the defense signaling pathways triggered by iturin A in Arabidopsis salicylic acid (SA) or jasmonic acid (JA)-insensitive mutants. Iturin A activated the transcription of defense genes PR1 and PDF1.2 through the SA and JA signaling pathways, respectively. The role of iturin A as an elicitor was dependent on the cyclization of the seven amino acids and/or the β-hydroxy fatty acid chain. The iturin A derivative peptide, NH2-(L-Asn)-(D-Tyr)-(D-Asn)-(L-Gln)-(L-Pro)-(D-Asn)-(L-Ser)-COOH, completely suppressed PR1 and PDF1.2 gene expression in wild Arabidopsis plants. The identification of target molecules binding to iturin A and its derivative peptide is expected to shed new light on defense response in plants through the SA and JA signaling pathways.
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Affiliation(s)
- Yumi Kawagoe
- Laboratory of Fruit Genetic Engineering, The Institute of Enology and Viticulture, University of Yamanashi, Kofu, Yamanashi 400-0005, Japan
| | - Soma Shiraishi
- Laboratory of Fruit Genetic Engineering, The Institute of Enology and Viticulture, University of Yamanashi, Kofu, Yamanashi 400-0005, Japan
| | - Hiroko Kondo
- Laboratory of Fruit Genetic Engineering, The Institute of Enology and Viticulture, University of Yamanashi, Kofu, Yamanashi 400-0005, Japan
| | | | - Yoshinao Aoki
- Laboratory of Fruit Genetic Engineering, The Institute of Enology and Viticulture, University of Yamanashi, Kofu, Yamanashi 400-0005, Japan
| | - Shunji Suzuki
- Laboratory of Fruit Genetic Engineering, The Institute of Enology and Viticulture, University of Yamanashi, Kofu, Yamanashi 400-0005, Japan.
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Abstract
Astrogliosis is a defense response of the CNS to minimize primary damage and to repair injured tissues, but it ultimately generates harmful effects by upregulating inhibitory molecules to suppress neuronal elongation and forming potent barriers to axon regeneration. Chondroitin sulfate proteoglycans (CSPGs) are highly expressed by reactive scars and are potent contributors to the non-permissive environment in mature CNS. Surmounting strong inhibition by CSPG-rich scar is an important therapeutic goal for achieving functional recovery after CNS injuries. Currently, enzymatic digestion of CSPGs with locally applied chondroitinase ABC is the main in vivo approach to overcome scar inhibition, but several disadvantages may prevent using this bacterial enzyme as a therapeutic option for patients. A better understanding of molecular mechanisms underlying CSPG function may facilitate development of new effective therapies to overcome scar-mediated inhibition. Previous studies support that CSPGs act by non-specifically hindering the binding of matrix molecules to their cell surface receptors through steric interactions, but two members of the leukocyte common antigen related (LAR) phosphatase subfamily, protein tyrosine phosphatase σ and LAR, are functional receptors that bind CSPGs with high affinity and mediate CSPG inhibition. CSPGs may also act by binding two receptors for myelin-associated growth inhibitors, Nogo receptors 1 and 3. Thus, CSPGs inhibit axon growth through multiple mechanisms, making them especially potent and difficult therapeutic targets. Identification of CSPG receptors is not only important for understanding the scar-mediated growth suppression, but also for developing novel and selective therapies to promote axon sprouting and/or regeneration after CNS injuries. This article is part of a Special Issue entitled SI: Spinal cord injury.
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Affiliation(s)
- Yosuke Ohtake
- Shriners Hospitals Pediatric Research Center and Department of Anatomy and Cell Biology, Temple University School of Medicine, 3500N. Broad Street, Philadelphia 19140, PA, USA
| | - Shuxin Li
- Shriners Hospitals Pediatric Research Center and Department of Anatomy and Cell Biology, Temple University School of Medicine, 3500N. Broad Street, Philadelphia 19140, PA, USA.
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O'Donnell NH, Møller BL, Neale AD, Hamill JD, Blomstedt CK, Gleadow RM. Effects of PEG-induced osmotic stress on growth and dhurrin levels of forage sorghum. Plant Physiol Biochem 2013; 73:83-92. [PMID: 24080394 DOI: 10.1016/j.plaphy.2013.09.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 09/05/2013] [Indexed: 05/27/2023]
Abstract
Sorghum (Sorghum bicolor L. Moench) is a valuable forage crop in regions with low soil moisture. Sorghum may accumulate high concentrations of the cyanogenic glucoside dhurrin when drought stressed resulting in possible cyanide (HCN) intoxication of grazing animals. In addition, high concentrations of nitrate, also potentially toxic to ruminants, may accumulate during or shortly after periods of drought. Little is known about the degree and duration of drought-stress required to induce dhurrin accumulation, or how changes in dhurrin concentration are influenced by plant size or nitrate metabolism. Given that finely regulating soil moisture under controlled conditions is notoriously difficult, we exposed sorghum plants to varying degrees of osmotic stress by growing them for different lengths of time in hydroponic solutions containing polyethylene glycol (PEG). Plants grown in medium containing 20% PEG (-0.5 MPa) for an extended period had significantly higher concentrations of dhurrin in their shoots but lower dhurrin concentrations in their roots. The total amount of dhurrin in the shoots of plants from the various treatments was not significantly different on a per mass basis, although a greater proportion of shoot N was allocated to dhurrin. Following transfer from medium containing 20% PEG to medium lacking PEG, shoot dhurrin concentrations decreased but nitrate concentrations increased to levels potentially toxic to grazing ruminants. This response is likely due to the resumption of plant growth and root activity, increasing the rate of nitrate uptake. Data presented in this article support a role for cyanogenic glucosides in mitigating oxidative stress.
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Affiliation(s)
- Natalie H O'Donnell
- School of Biological Sciences, Monash University, Clayton, Victoria 3800, Australia
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40
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Zhang X, Han X, Shi R, Yang G, Qi L, Wang R, Li G. Arabidopsis cysteine-rich receptor-like kinase 45 positively regulates disease resistance to Pseudomonas syringae. Plant Physiol Biochem 2013; 73:383-91. [PMID: 24215930 DOI: 10.1016/j.plaphy.2013.10.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 10/18/2013] [Indexed: 05/10/2023]
Abstract
Arabidopsis cysteine-rich receptor-like protein kinase 45 (CRK45) was found to be involved in ABA signaling in Arabidopsis thaliana previously. Here, we reported that it also positively regulates disease resistance. The CRK45 overexpression plants increased expression of the defense genes, and enhanced resistance to Pseudomonas syringae whereas the crk45 mutant were more sensitive to P. syringae and weakened expression of the defense genes, compared to the wild type. We also found that treatment with P. syringae leads to a declined expression of CRK45 in the npr1 mutant and the NahG transgenic plants. At the same time, significantly decreased expression of CRK45 transcript in the wrky70 mutant than that in the wild type was also detected. Our results suggested that CRK45 acted as a positive regulator in Arabidopsis disease resistance, and was regulated downstream of NPR1 and WRKY70 at the transcriptional level.
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Affiliation(s)
- Xiujuan Zhang
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, PR China; Inner Mongolia Institute of Biotechnology, Hohhot, Inner Mongolia 010070, PR China.
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Espinoza J, Montaño LM, Perusquía M. Nongenomic bronchodilating action elicited by dehydroepiandrosterone (DHEA) in a guinea pig asthma model. J Steroid Biochem Mol Biol 2013; 138:174-82. [PMID: 23727130 DOI: 10.1016/j.jsbmb.2013.05.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 04/16/2013] [Accepted: 05/22/2013] [Indexed: 10/26/2022]
Abstract
Primates secrete large amounts of the precursor steroid dehydroepiandrosterone (DHEA); in humans, its levels are low during childhood and start declining after the fourth decade. It has been postulated that the progressive decline in DHEA levels may be related with the severity of asthma associated with age. To determine whether DHEA may regulate the airway smooth muscle (ASM) activity, isolated tracheal rings with and without epithelium from male guinea pigs were isometrically recorded to characterize the response of ASM to DHEA at different concentrations on KCl- and carbachol (CCh)-induced contraction as well as on ovalbumin (OVA)-induced contraction in sensitized guinea pigs. Additionally, we used barometric plethysmography in sensitized guinea pigs in order to compare changes of the lung resistance increased by the antigen challenge to OVA in the absence and presence of different doses of DHEA. DHEA concentration-dependently abolished the contraction to KCl, CCh and OVA, and no differences were found in preparations with and without epithelium. DHEA-induced relaxation was not modified by the suppression of protein synthesis or transcription, pharmacological inhibition of nitric oxide (NO) synthase, nor by antagonist of β2-adrenergic receptors or an inhibitor of the 3β-HSD enzyme. Likewise, Ca(2+)-induced contraction in Ca(2+)-free depolarized tissues was antagonized by DHEA, and the contraction to the L-type voltage-dependent calcium channel activator (Bay K 8644) was inhibited by DHEA. Furthermore, DHEA prevented OVA-induced increases in lung resistance. These results indicate that DHEA-induced relaxation in ASM is a nongenomic (membrane) action and is not produced after its bioconversion. The data suggest that DHEA-induced relaxation is an epithelium- and NO-independent mechanism that involves a blockade of voltage-dependent calcium channels and possible non-selective cation channels.
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Affiliation(s)
- Julia Espinoza
- Universidad Nacional Autónoma de México, Instituto de Investigaciones Biomédicas, Departamento de Biología Celular y Fisiología, México, D.F. 04510, Mexico
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Diamant Z, Gauvreau GM, Cockcroft DW, Boulet LP, Sterk PJ, de Jongh FH, Dahlén B, O'Byrne PM. Inhaled allergen bronchoprovocation tests. J Allergy Clin Immunol 2013; 132:1045-1055.e6. [PMID: 24119772 DOI: 10.1016/j.jaci.2013.08.023] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 07/16/2013] [Accepted: 08/20/2013] [Indexed: 11/23/2022]
Abstract
The allergen bronchoprovocation test is a long-standing exacerbation model of allergic asthma that can induce several clinical and pathophysiologic features of asthma in sensitized subjects. Standardized allergen challenge is primarily a research tool, and when properly conducted by qualified and experienced investigators, it is safe and highly reproducible. In combination with validated airway sampling and sensitive detection techniques, allergen challenge allows the study of several features of the physiology of mainly TH2 cell-driven asthma in relation to the kinetics of the underlying airway pathology occurring during the allergen-induced late response. Furthermore, given the small within-subject variability in allergen-induced airway responses, allergen challenge offers an adequate disease model for the evaluation of new (targeted) controller therapies for asthma in a limited number of subjects. In proof-of-efficacy studies thus far, allergen challenge showed a fair positive predicted value and an excellent negative predictive value for the actual clinical efficacy of new antiasthma therapies, underscoring its important role in early drug development. In this review we provide recommendations on challenge methods, response measurements, sample size, safety, and harmonization for future applications.
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Uehara-Ichiki T, Shiba T, Matsukura K, Ueno T, Hirae M, Sasaya T. Detection and diagnosis of rice-infecting viruses. Front Microbiol 2013; 4:289. [PMID: 24130554 PMCID: PMC3793123 DOI: 10.3389/fmicb.2013.00289] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Accepted: 09/07/2013] [Indexed: 11/25/2022] Open
Abstract
Rice-infecting viruses have caused serious damage to rice production in Asian, American, and African countries, where about 30 rice viruses and diseases have been reported. To control these diseases, developing accurate, quick methods to detect and diagnose the viruses in the host plants and any insect vectors of the viruses is very important. Based on an antigen-antibody reaction, serological methods such as latex agglutination reaction and enzyme-linked immunosorbent assay have advanced to detect viral particles or major proteins derived from viruses. They aid in forecasting disease and surveying disease spread and are widely used for virus detection at plant protection stations and research laboratories. From the early 2000s, based on sequence information for the target virus, several other methods such as reverse transcription-polymerase chain reaction (RT-PCR) and reverse transcription-loop-mediated isothermal amplification have been developed that are sensitive, rapid, and able to differentiate closely related viruses. Recent techniques such as real-time RT-PCR can be used to quantify the pathogen in target samples and monitor population dynamics of a virus, and metagenomic analyses using next-generation sequencing and microarrays show potential for use in the diagnosis of rice diseases.
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Affiliation(s)
- Tamaki Uehara-Ichiki
- Classification and Evaluation Research Unit, Genetic Resources Center, National Institute of Agrobiological SciencesTsukuba, Ibaraki, Japan
| | - Takuya Shiba
- Plant Protection Division, Agricultural Research Center, National Agriculture and Food Research OrganizationTsukuba, Ibaraki, Japan
| | - Keiichiro Matsukura
- Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research OrganizationKoshi, Kumamoto, Japan
| | - Takanori Ueno
- Food and Agricultural Materials Inspection CenterKodaira, Tokyo, Japan
| | - Masahiro Hirae
- Plant Protection Division, Agricultural Research Center, National Agriculture and Food Research OrganizationTsukuba, Ibaraki, Japan
| | - Takahide Sasaya
- Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research OrganizationKoshi, Kumamoto, Japan
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Luzzatto-Knaan T, Kerem Z, Lipsky A, Yedidia I. A systemic response of geophytes is demonstrated by patterns of protein expression and the accumulation of signal molecules in Zantedeschia aethiopica. Plant Physiol Biochem 2013; 71:218-225. [PMID: 23968930 DOI: 10.1016/j.plaphy.2013.07.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 07/25/2013] [Indexed: 06/02/2023]
Abstract
In geophyte plants, such as Zantedeschia, individual leaves are directly connected to a specialized underground storage organ (rhizome/tuber), raising a question regarding systemic resistance as a mechanism of defense. A systemic response requires a transfer of a signal through the storage organ which has been evolutionary adapted to store food, minerals and moisture for seasonal growth and development. We have characterized the nature of induced defense responses in Zantedeschia aethiopica, a rhizomatous (tuber-like) ornamental plant by the application of local elicitation using two well-known defense elicitors, benzo-(1,2,3)-thiadiazole-7-carbothioic acid S-methyl ester (BTH) and methyl jasmonate (MJ). The system consisted leaves in which local responses were directly induced, and systemically responsive leaves in which defense molecules were detected, demonstrating a transported vascular signal. Using anatomical and biochemical tools and local elicitation with MJ, the systemic nature of the response was verified in adjacent leaves by unique protein expression patterns; similarly polyphenol oxidase (PPO) activity was found to increase systemically in all parts of the locally induced plants, including the rhizome, and adjacent leaves; finally, significant accumulation of defense signal molecules such as salicylic and jasmonic acids was recorded in local and systemic leaves following elicitation with BTH. Anatomical sections through the leaves and the rhizome revealed that to be transferred from one leaf to its neighbor, signal molecules must have been transferred through the storage organ. The collected data strongly support our hypothesis that defense signals may and are transferred through the storage organ in monocot geophytes.
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Affiliation(s)
- Tal Luzzatto-Knaan
- Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel; Department of Ornamental Horticulture, ARO, The Volcani Center, Derech Hamacabim 20, P.O. Box 6, Bet-Dagan 50250, Israel
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Song YS, Lee HJ, Prosselkov P, Itohara S, Kim E. Trans-induced cis interaction in the tripartite NGL-1, netrin-G1 and LAR adhesion complex promotes development of excitatory synapses. J Cell Sci 2013; 126:4926-38. [PMID: 23986473 DOI: 10.1242/jcs.129718] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The initial contact between axons and dendrites at early neuronal synapses is mediated by surface adhesion molecules and is thought to induce synaptic maturation through the recruitment of additional synaptic proteins. The initiation of synaptic maturation should be tightly regulated to ensure that synaptic maturation occurs selectively at subcellular sites of axo-dendritic adhesion. However, the underlying mechanism is poorly understood. Here, we report that the initial trans-synaptic adhesion mediated by presynaptic netrin-G1 and postsynaptic NGL-1 (netrin-G1 ligand-1) induces a cis interaction between netrin-G1 and the receptor protein tyrosine phosphatase LAR (leukocyte antigen-related), and that this promotes presynaptic differentiation. We propose that trans-synaptic adhesions at early neuronal synapses trigger recruitment of neighboring adhesion molecules in a cis manner in order to couple initial axo-dendritic adhesion with synaptic differentiation.
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Affiliation(s)
- Yoo Sung Song
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea
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Theodoropoulou M, Stalla GK. Somatostatin receptors: from signaling to clinical practice. Front Neuroendocrinol 2013; 34:228-52. [PMID: 23872332 DOI: 10.1016/j.yfrne.2013.07.005] [Citation(s) in RCA: 231] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 06/13/2013] [Accepted: 07/12/2013] [Indexed: 02/08/2023]
Abstract
Somatostatin is a peptide with a potent and broad antisecretory action, which makes it an invaluable drug target for the pharmacological management of pituitary adenomas and neuroendocrine tumors. Somatostatin receptors (SSTR1, 2A and B, 3, 4 and 5) belong to the G protein coupled receptor family and have a wide expression pattern in both normal tissues and solid tumors. Investigating the function of each SSTR in several tumor types has provided a wealth of information about the common but also distinct signaling cascades that suppress tumor cell proliferation, survival and angiogenesis. This provided the rationale for developing multireceptor-targeted somatostatin analogs and combination therapies with signaling-targeted agents such as inhibitors of the mammalian (or mechanistic) target of rapamycin (mTOR). The ability of SSTR to internalize and the development of rabiolabeled somatostatin analogs have improved the diagnosis and treatment of neuroendocrine tumors.
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Affiliation(s)
- Marily Theodoropoulou
- Department of Endocrinology, Max Planck Institute of Psychiatry, Kraepelinstrasse 10, 80804 Munich, Germany.
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Bonner K, Pease JE, Corrigan CJ, Clark P, Kay AB. CCL17/thymus and activation-regulated chemokine induces calcitonin gene-related peptide in human airway epithelial cells through CCR4. J Allergy Clin Immunol 2013; 132:942-50.e1-3. [PMID: 23731651 DOI: 10.1016/j.jaci.2013.04.015] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 03/08/2013] [Accepted: 04/16/2013] [Indexed: 11/21/2022]
Abstract
BACKGROUND Calcitonin gene-related peptide (CGRP) is a potent arterial and venous vasodilator. Increased airway epithelial cell expression of CGRP, together with increased CCL17 expression, was previously observed in a model of provoked asthma in atopic human subjects. OBJECTIVE We sought to determine whether CCL17 induces CCR4-dependent CGRP synthesis and secretion by human airway epithelial cells. METHODS Human airway epithelial cell lines (BEAS-2B and A549) and human primary airway cells were cultured with CCL17 or various other cytokines, and CGRP expression was measured by using RT-PCR, quantitative immunofluorescence, and enzyme immunoassay. CCR4 expression was determined in cultured cells by using flow cytometry and in bronchial biopsy specimens by using immunohistochemistry. RESULTS CCL17 induced a several thousand-fold increase in CGRP mRNA expression and released peptide product from BEAS-2B and A549 cells in a time- and concentration-dependent fashion. Concentration-dependent CCL17-induced release of CGRP by primary human airway epithelial cells was also observed. Under comparable conditions, CCL17 induced greater CGRP release from BEAS-2B cells than either IL-13, a cytokine mixture (TNF-α, GM-CSF, and IL-1), or CCL22. CCR4 was expressed by BEAS-2B and A549 cells and internalized after ligation with CCL17. CCL17-induced CGRP release was inhibited by a specific anti-CCR4 blocking antibody. Bronchial biopsy specimens obtained from healthy volunteers and asthmatic patients before and after provoked asthma all exhibited CCR4 staining of equivalent intensity, indicating that the receptor is constitutively expressed. CONCLUSIONS CCL17-induced, CCR4-dependent release of CGRP by human airway epithelial cells represents a novel inflammatory pathway and a possible target in patients with asthma and allergic disease.
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Abstract
The laryngeal adductor reflex (LAR) is an involuntary protective response to stimuli in the larynx. The superior laryngeal nerve (SLN) acts as the afferent limb and the recurrent laryngeal nerve (RLN) as the efferent limb of this reflex, which is modulated by the central nervous system. Perhaps the most clinically significant application of the LAR is its use in laryngopharyngeal (LP) sensory discrimination testing. Importantly, aberrations in the LAR may predict dysphagia or portend clinical phenotypes of chronic cough, vocal cord dysfunction or pediatric apneas. LP sensation is a potential target for interventions addressing the aforementioned conditions though currently remains an area of active investigation.
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Affiliation(s)
- Amanda S Domer
- Department of Communication Sciences & Disorders, University of South Florida, 4202 E. Fowler Avenue, PCD1017, Tampa, FL 33620, , ,
| | - Maggie A Kuhn
- Department of Otolaryngology-Head & Neck Surgery, University of California, Davis, 2521 Stockton Blvd, Suite 6201, Sacramento, CA 95817, , ,
| | - Peter C Belafsky
- Department of Otolaryngology-Head & Neck Surgery, University of California, Davis, 2521 Stockton Blvd, Suite 7200, Sacramento, CA 95817, , ,
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