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Zaky W, Ragoonanan D, Batth I, Dao L, Wang J, Xia X, Daw NC, Gill JB, Khatua S, Li S. Automated Capture and Analysis of Circulating Tumor Cells in Pediatric, Adolescent and Young Adult Patients with Central Nervous System Tumors. Cancers (Basel) 2023; 15:3853. [PMID: 37568669 PMCID: PMC10417345 DOI: 10.3390/cancers15153853] [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: 06/29/2023] [Revised: 07/24/2023] [Accepted: 07/26/2023] [Indexed: 08/13/2023] Open
Abstract
Tumors of the central nervous system (CNS) are the most common and lethal childhood malignancy. Detection of residual disease and longitudinal monitoring of treatment response in patients are challenging and rely on serial imaging. This current standard of care fails to detect microscopic disease or provide molecular characteristics of residual tumors. As such, there is dire need for minimally invasive liquid biopsy techniques. We have previously shown the high specificity of using cell surface vimentin (CSV) to identify circulating tumor cells (CTCs) from patients bearing various types of cancers. Here, we describe the first report of CTCs captured from peripheral blood samples in 58 pediatric CNS tumor patients. In this study, we used a CSV-coated cell capture chip, the Abnova CytoQuest automated CTC isolation system, to boost the CTC capture from pediatric patients with CNS tumors. We successfully isolated CTCs in six glioma patients using immunostaining of histone H3 lysine27-to-methionine (H3K27M) mutations which are highly expressed by this tumor. We show that CSV is a viable marker for CNS CTC isolation and that this is a feasible method for detecting microscopic disease. Larger-scale studies focusing on CTCs in pediatric CNS tumors to explore their diagnostic and prognostic value are warranted.
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Affiliation(s)
- Wafik Zaky
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX 77023, USA
| | - Dristhi Ragoonanan
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX 77023, USA
| | - Izhar Batth
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX 77023, USA
| | - Long Dao
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX 77023, USA
| | - Jian Wang
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Xueqing Xia
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX 77023, USA
| | - Najat C. Daw
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX 77023, USA
| | - Jonathan B. Gill
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX 77023, USA
| | - Soumen Khatua
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX 77023, USA
| | - Shulin Li
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX 77023, USA
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Dao L, Zhao Q, Hu J, Xia X, Yang Q, Li S. A microfluidics-based method for isolation and visualization of cells based on receptor-ligand interactions. PLoS One 2022; 17:e0274601. [PMID: 36201506 PMCID: PMC9536614 DOI: 10.1371/journal.pone.0274601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 08/31/2022] [Indexed: 11/21/2022] Open
Abstract
Receptor-ligand binding has been analyzed at the protein level using isothermal titration calorimetry and surface plasmon resonance and at the cellular level using interaction-associated downstream gene induction/suppression. However, no currently available technique can characterize this interaction directly through visualization. In addition, all available assays require a large pool of cells; no assay capable of analyzing receptor-ligand interactions at the single-cell level is publicly available. Here, we describe a new microfluidic chip-based technique for analyzing and visualizing these interactions at the single-cell level. First, a protein is immobilized on a glass slide and a low-flow-rate pump is used to isolate cells that express receptors that bind to the immobilized ligand. Specifically, we demonstrate the efficacy of this technique by immobilizing biotin-conjugated FGL2 on an avidin-coated slide chip and passing a mixture of GFP-labeled wild-type T cells and RFP-labeled FcγRIIB-knockout T cells through the chip. Using automated scanning and counting, we found a large number of GFP+ T cells with binding activity but significantly fewer RFP+ FcγRIIB-knockout T cells. We further isolated T cells expressing a membrane-anchored, tumor-targeted IL-12 based on the receptor's affinity to vimentin to confirm the versatility of our technique. This protocol allows researchers to isolate receptor-expressing cells in about 4 hours for further downstream processing.
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Affiliation(s)
- Long Dao
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Qingnan Zhao
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Jiemiao Hu
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Xueqing Xia
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Qing Yang
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Shulin Li
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
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Yameogo Zoungrana W, Guiguimde A, Nikiema E, Tougouma S, Diallo H, Traore O, Dahourou D, Dembele E, Delma S, Dao L. 73 - Etude des nouveau-nés prématurés hospitalisés à l'hôpital de Tengandogo, Burkina Faso. Rev Epidemiol Sante Publique 2022. [DOI: 10.1016/j.respe.2022.06.212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
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Hu J, Yang Q, Zhang W, Du H, Dao L, Xia X, Fowlkes N, Mahadeo K, Gorlick R, Dotti G, Li S. Cell membrane-anchored and tumor-targeted IL-12 (attIL12)-T cell therapy for eliminating large and heterogeneous solid tumors. The Journal of Immunology 2022. [DOI: 10.4049/jimmunol.208.supp.117.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract
Background
Adoptive T-cell transfer has become an attractive therapeutic approach for hematologic malignancies but shows poor activity against large and heterogeneous solid tumors. Interleukin-12 (IL-12) potent antitumor efficacy against solid tumors, but its clinical application has been stalled because of toxicity. Here, we aimed to develop a safe approach to IL-12 T-cell therapy for eliminating large solid tumors.
Methods
We generated a cell membrane-anchored IL-12 (aIL12), a tumor-targeted IL-12 (ttIL12), and a cell membrane-anchored and tumor-targeted IL-12 (attIL12) armed T cells, CAR-T cells, and TCR-T cells with each. We compared the antitumor efficacy of these armed T cells in treating osteosarcoma PDX tumors and mouse melanoma tumors, and addressed the safety concerns of IL-12 expressing T cell therapy after intravenous infusions of the armed T cells.
Results
attIL12-T cell infusion showed remarkable antitumor efficacy in human and mouse large solid tumor models. Mechanistically, attIL12-T cells target tumor cells that express cell-surface vimentin (CSV) and accumulate in tumor sites. Such CSV-attIL12 interaction stimulates effector T cell to produce high levels of inflammatory cytokines (IFNγ, Flt3L, GM-CSF and etc.) only in tumors, which in turn triggers dendritic cell maturation for activating secondary T-cell responses and tumor antigen spreading. Both attIL12- and aIL12-T-cell transfer eliminated peripheral cytokine release and the associated toxic effects due to tumor-specific T cell distribution and compartment-dependent cytokine secretion.
Conclusions
This novel approach sheds light on the safe application of IL-12–based T-cell therapy for large and heterogeneous solid tumors.
Supported by R01 CA200574
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Ragoonanan D, Dao L, Williams L, Gill J, Khazal SJ, Tewari P, Petropoulos D, Mahadeo KM, Li S. Cell Surface Vimentin-Positive Circulating Tumor Cells May Predict Disease Relapse Post Hematopoietic Stem Cell Transplantation or Cellular Therapy in Patients with Hematological Malignancies. Transplant Cell Ther 2022. [DOI: 10.1016/s2666-6367(22)00719-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Scrivner O, Dao L, Newell-Rogers MK, Shahandeh B, Meyskens FL, Kozawa SK, Liu-Smith F, Plascencia-Villa G, José-Yacamán M, Jia S, Chang CJ, Farmer PJ. The ionophore thiomaltol induces rapid lysosomal accumulation of copper and apoptosis in melanoma. Metallomics 2022; 14:mfab074. [PMID: 34958363 PMCID: PMC8763036 DOI: 10.1093/mtomcs/mfab074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 12/05/2021] [Indexed: 12/30/2022]
Abstract
In this report, we investigate the toxicity of the ionophore thiomaltol (Htma) and Cu salts to melanoma. Divalent metal complexes of thiomaltol display toxicity against A375 melanoma cell culture resulting in a distinct apoptotic response at submicromolar concentrations, with toxicity of Cu(tma)2 > Zn(tma)2 >> Ni(tma)2. In metal-chelated media, Htma treatment shows little toxicity, but the combination with supplemental CuCl2, termed Cu/Htma treatment, results in toxicity that increases with suprastoichiometric concentrations of CuCl2 and correlates with the accumulation of intracellular copper. Electron microscopy and confocal laser scanning microscopy of Cu/Htma treated cells shows a rapid accumulation of copper within lysosomes over the course of hours, concurrent with the onset of apoptosis. A buildup of ubiquitinated proteins due to proteasome inhibition is seen on the same timescale and correlates with increases of copper without additional Htma.
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Affiliation(s)
- Ottis Scrivner
- Department of Chemistry & Biochemistry, Baylor University, Waco, TX 76706, USA
| | - Long Dao
- Department of Medical Physiology, College of Medicine, Texas A&M Health Sciences Center, Bryan, TX 77807, USA
| | - M Karen Newell-Rogers
- Department of Medical Physiology, College of Medicine, Texas A&M Health Sciences Center, Bryan, TX 77807, USA
| | | | | | - Susan Kurumi Kozawa
- Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Feng Liu-Smith
- Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Germán Plascencia-Villa
- Department of Neuroscience, Developmental and Regenerative Biology, The University of Texas at San Antonio, San Antonio, TX 78249, USA
| | - Miguel José-Yacamán
- Applied Physics and Materials Science Department and MIRA Center, Northern Arizona University, Flagstaff, AZ 86011, USA
| | - Shang Jia
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Christopher J Chang
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | - Patrick J Farmer
- Department of Chemistry & Biochemistry, Baylor University, Waco, TX 76706, USA
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Hu J, Yang Q, Zhang W, Du H, Chen Y, Zhao Q, Dao L, Xia X, Natalie Wall F, Zhang Z, Mahadeo K, Gorlick R, Kopetz S, Dotti G, Li S. Cell membrane-anchored and tumor-targeted IL-12 (attIL12)-T cell therapy for eliminating large and heterogeneous solid tumors. J Immunother Cancer 2022; 10:jitc-2021-003633. [PMID: 35027427 PMCID: PMC8762133 DOI: 10.1136/jitc-2021-003633] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [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] [Accepted: 11/29/2021] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Adoptive T-cell transfer has become an attractive therapeutic approach for hematological malignancies but shows poor activity against large and heterogeneous solid tumors. Interleukin-12 (IL-12) exhibits potent antitumor efficacy against solid tumors, but its clinical application has been stalled because of toxicity. Here, we aimed to develop a safe approach to IL-12 T-cell therapy for eliminating large solid tumors. METHODS We generated a cell membrane-anchored IL-12 (aIL12), a tumor-targeted IL-12 (ttIL12), and a cell membrane-anchored and ttIL-12 (attIL12) and a cell membrane-anchored and tumor-targeted ttIL-12 (attIL12) armed T cells, chimeric antigen receptor-T cells, and T cell receptor-T (TCR-T) cells with each. We compared the safety and efficacy of these armed T cells in treating osteosarcoma patient-derived xenograft tumors and mouse melanoma tumors after intravenous infusions of the armed T cells. RESULTS attIL12-T cell infusion showed remarkable antitumor efficacy in human and mouse large solid tumor models. Mechanistically, attIL12-T cells targeted tumor cells expressing cell-surface vimentin, enriching effector T cell and interferon γ production in tumors, which in turn stimulates dendritic cell maturation for activating secondary T-cell responses and tumor antigen spreading. Both attIL12- and aIL12-T-cell transfer eliminated peripheral cytokine release and the associated toxic effects. CONCLUSIONS This novel approach sheds light on the safe application of IL-12-based T-cell therapy for large and heterogeneous solid tumors.
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Affiliation(s)
- Jiemiao Hu
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Qing Yang
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Wendong Zhang
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Hongwei Du
- Lineberger Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Yuhui Chen
- Lineberger Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Qingnan Zhao
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Long Dao
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Xueqing Xia
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Fowlkes Natalie Wall
- Veterinary Medicine & Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Zhongting Zhang
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Kris Mahadeo
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Richard Gorlick
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - S Kopetz
- Department of Gastrointestinal Medical Oncology, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Gianpietro Dotti
- Lineberger Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA,Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Shulin Li
- Division of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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Dao L, Ragoonanan D, Batth I, Satelli A, Foglesong J, Wang J, Zaky W, Gill JB, Liu D, Albert A, Gordon N, Huh W, Harrison D, Herzog C, Kleinerman E, Gorlick R, Daw N, Li S. Prognostic Value of Cell-Surface Vimentin-Positive CTCs in Pediatric Sarcomas. Front Oncol 2021; 11:760267. [PMID: 34956881 PMCID: PMC8695931 DOI: 10.3389/fonc.2021.760267] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 11/11/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Despite advances in care, the 5 year overall survival for patients with relapsed and or metastatic sarcoma remains as low as < 35%. Currently, there are no biomarkers available to assess disease status in patients with sarcomas and as such, disease surveillance remains reliant on serial imaging which increases the risk of secondary malignancies and heightens patient anxiety. METHODS Here, for the first time reported in the literature, we have enumerated the cell surface vimentin (CSV+) CTCs in the blood of 92 sarcoma pediatric and adolescent and young adult (AYA) patients as a possible marker of disease. RESULTS We constructed a ROC with an AUC of 0.831 resulting in a sensitivity of 85.3% and a specificity of 75%. Additionally, patients who were deemed to be CSV+ CTC positive were found to have a worse overall survival compared to those who were CSV+ CTC negative. We additionally found the use of available molecular testing increased the accuracy of our diagnostic and prognostic tests. CONCLUSIONS Our findings indicate that CSV+ CTCs have prognostic value and can possibly serve as a measure of disease burden.
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Affiliation(s)
- Long Dao
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Dristhi Ragoonanan
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Izhar Batth
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Arun Satelli
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Jessica Foglesong
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Jian Wang
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Wafik Zaky
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Jonathan B. Gill
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Diane Liu
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Aisha Albert
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Nancy Gordon
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Winston Huh
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Douglas Harrison
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Cynthia Herzog
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Eugenie Kleinerman
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Richard Gorlick
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Najat Daw
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Shulin Li
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States,*Correspondence: Shulin Li,
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Dao L, Ragoonanan D, Foglesong J, Batth IS, Zaky WT, Gill JB, Liu DD, Albert A, Gordon NB, Huh WW, Harrison DJ, Herzog CE, Kleinerman E, Gorlick RG, Daw NC, Li S. Cell-surface vimentin positive circulating tumor cells as a diagnostic and prognostic indicator in pediatric sarcoma patients. J Clin Oncol 2021. [DOI: 10.1200/jco.2021.39.15_suppl.e15022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e15022 Background: Despite advances in care, the 5 year overall survival for patients with relapsed and or metastatic sarcoma remains as low as < 35%. Currently, there are no biomarkers available to assess disease status in patients with sarcomas and as such, disease surveillance remains only reliant on serial imaging which increases the risk of secondary malignancies and heightens patient anxiety. Methods: Here, we enumerated the cell surface vimentin (CSV+) CTCs in the blood of 92 sarcoma pediatric and adolescent and young adult (AYA) patients. Results: We discovered the CSV+CTC could serve as a possible biomarker of disease with sensitivity of 85.3% and specificity of 75%. Significantly, patients who were deemed to be CSV+ CTC positive were found to have a worse overall survival compared to those who were CSV+ CTC negative (773 days vs 2622 days). Addition of readily available genetic analyses improved the sensitivity in both diagnostic and prognostic tests. Conclusions: Our findings indicate that CSV+ CTCs have both diagnostic and prognostic value and can possibly serve as a measure of disease burden.
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Affiliation(s)
| | - Dristhi Ragoonanan
- The University of Texas MD Anderson Cancer Center, Department of Pediatrics, Houston, TX
| | | | | | | | | | - Diane D. Liu
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Aisha Albert
- University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Winston W. Huh
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | | | | | - Najat C. Daw
- The University of Texas MD Anderson Cancer Center, Houston, TX
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Dao L, Ragoonanan D, Yi S, Swinford R, Petropoulos D, Mahadeo KM, Li S. The Organ Trail: A Review of Biomarkers of Organ Failure. Front Oncol 2020; 10:579219. [PMID: 33262945 PMCID: PMC7686565 DOI: 10.3389/fonc.2020.579219] [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] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 10/15/2020] [Indexed: 11/13/2022] Open
Abstract
Pediatric organ failure and transplant populations face significant risks of morbidity and mortality. The risk of organ failure itself may be disproportionately higher among pediatric oncology patients, as cancer may originate within and/or metastasize to organs and adversely affect their function. Additionally, cancer directed therapies are frequently toxic to organs and may contribute to failure. Recent reports suggest that nearly half of providers find it difficult to provide prognostic information regarding organ failure due to unknown disease trajectories. Unfortunately, there is a lack of uniform methodology in detecting the early symptoms of organ failure, which may delay diagnosis, initiation of treatment and hinder prognostic planning. There remains a wide array of outstanding scientific questions regarding organ failure in pediatrics but emerging data may change the landscape of prognostication. Liquid biopsy, in which disease biomarkers are detected in bodily fluids, offers a noninvasive alternative to tissue biopsy and may improve prompt detection of organ failure and prognostication. Here, we review potential liquid biopsy biomarkers for organ failure, which may be particularly useful among pediatric oncology patients. We synthesized information from publications obtained on PubMed, Google Scholar, clinicaltrials.gov, and Web of Science and categorized our findings based on the type of biomarker used to detect organ failure. We highlight the advantages and disadvantages specific to each type of organ failure biomarker. While much work needs to be done to advance this field and validate its applicability to pediatric cancer patients facing critical care complications, herein, we highlight promising areas for future discovery.
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Affiliation(s)
- Long Dao
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Dristhi Ragoonanan
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Sofia Yi
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Rita Swinford
- Division of Pediatric Nephrology, University of Texas Health Science Center Houston, Houston, TX, United States
| | - Demetrios Petropoulos
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Kris M Mahadeo
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Shulin Li
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
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Batth IS, Dao L, Satelli A, Mitra A, Yi S, Noh H, Li H, Brownlee Z, Zhou S, Bond J, Wang J, Gill J, Sholler GS, Li S. Cell surface vimentin-positive circulating tumor cell-based relapse prediction in a long-term longitudinal study of postremission neuroblastoma patients. Int J Cancer 2020; 147:3550-3559. [PMID: 32506485 DOI: 10.1002/ijc.33140] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [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: 02/28/2020] [Revised: 05/15/2020] [Accepted: 05/22/2020] [Indexed: 12/13/2022]
Abstract
Neuroblastoma (NB) is a deadly childhood disease that carries a 50% chance of relapse for anyone in remission and similar level of 5-year survival. We investigated the value of our proprietary approach-cell surface vimentin (CSV) positive circulating tumor cells (CTC) to monitor treatment response and predict relapse in NB patients under remission in a Phase II long-term preventative clinical trial. We longitudinally analyzed peripheral blood samples from 93 patients for 27 cycles (~25 months) and discovered that the presence of CSV+ CTCs in the first two sequential samples (baseline, cycle 4 [month 3-4]) was a significant indicator of earlier relapse. We observed strong correlation between relapse-free survival (RFS) and lack of CSV+ CTCs in first 4 cycles of therapy (95%). There was sensitivity reaching 100% in predicting RFS in patients who had neither CSV+ CTCs nor MycN amplification. Of note, the low number of CSV+ CTCs seems equivalent to low tumor load because the prevention therapy difluoromethylornithine yields faster reduction of relapse risk when none or only 1-2 CSV+ CTCs (every 6 mL) are present in the blood samples compared to >3 CSV+ CTCs. To the best of our knowledge, this is the first study that directly observes CTCs in under remission NB patients for relapse prediction and the first to gather sequential CSV+ CTC data in any study in a long-term longitudinal manner.
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Affiliation(s)
- Izhar S Batth
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Long Dao
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Arun Satelli
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Abhisek Mitra
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Sofia Yi
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Hyangsoon Noh
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Heming Li
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Zachary Brownlee
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Shouhao Zhou
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jeffrey Bond
- Pediatric Oncology Translational Research Program, Helen DeVos Children's Hospital, Grand Rapids, Michigan, USA
| | - Jing Wang
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jonathan Gill
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Giselle S Sholler
- Pediatric Oncology Translational Research Program, Helen DeVos Children's Hospital, Grand Rapids, Michigan, USA
| | - Shulin Li
- Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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Wei L, Lim SG, Xie Q, Văn KN, Piratvisuth T, Huang Y, Wu S, Xu M, Tang H, Cheng J, Le Manh H, Gao Y, Mou Z, Sobhonslidsuk A, Dou X, Thongsawat S, Nan Y, Tan CK, Ning Q, Tee HP, Mao Y, Stamm LM, Lu S, Dvory-Sobol H, Mo H, Brainard DM, Yang YF, Dao L, Wang GQ, Tanwandee T, Hu P, Tangkijvanich P, Zhang L, Gao ZL, Lin F, Le TTP, Shang J, Gong G, Li J, Su M, Duan Z, Mohamed R, Hou JL, Jia J. Sofosbuvir–velpatasvir for treatment of chronic hepatitis C virus infection in Asia: a single-arm, open-label, phase 3 trial. Lancet Gastroenterol Hepatol 2019; 4:127-134. [DOI: 10.1016/s2468-1253(18)30343-1] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 10/10/2018] [Accepted: 10/12/2018] [Indexed: 02/06/2023]
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Gao N, Hu R, Huang Y, Dao L, Zhang C, Liu Y, Wu L, Wang X, Yin W, Gore AC, Sun Z. Specific effects of prenatal DEHP exposure on neuroendocrine gene expression in the developing hypothalamus of male rats. Arch Toxicol 2017; 92:501-512. [PMID: 28871463 DOI: 10.1007/s00204-017-2049-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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: 05/12/2017] [Accepted: 08/28/2017] [Indexed: 12/29/2022]
Abstract
Endocrine disrupting chemicals may disrupt developing neuroendocrine systems, especially when the exposure occurs during a critical period. This study aimed to investigate whether prenatal exposure to di-(2-ethylhexyl) phthalate (DEHP), a major component of plasticizers used worldwide, disrupted the development of a network of genes important for neuroendocrine function in male rats. Pregnant rats were treated with corn oil (vehicle control), 2, 10 or 50 mg/kg DEHP by gavage from gestational day 14 to 19. The neuroendocrine gene expressions were quantified using a 48-gene Taqman qPCR array in the whole hypothalamus of neonatal rats (postnatal day 1) and in the anteroventral periventricular nucleus (AVPV), medial preoptic nucleus (MPN) and arcuate nucleus (ARC) of adult rats (postnatal day 70). Immunofluorescent signals of ERα and CYP19 were detected using the confocal microscopy in adult AVPV, MPN and ARC. The results showed that prenatal DEHP exposure perturbed somatic and reproductive development of offspring. Eleven genes were down-regulated in neonatal hypothalamus and showed non-monotonic dose-response relationships, that the 10 mg/kg DEHP dosage was associated with the greatest number of gene expression changes. Different from this, 14 genes were altered in adult AVPV, MPN and ARC and most of alterations were found in the 50 mg/kg DEHP group. Also, 50 mg/kg DEHP reduced ERα expression in the ARC, but no alterations were observed in CYP19 expression. These results indicated that prenatal DEHP exposure may perturb hypothalamic gene programming and the influences are permanent. The effects showed dependence on developmental stages and nuclei region.
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Affiliation(s)
- Na Gao
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Rd., Heping Dist., Tianjin, 300070, People's Republic of China
| | - Ruixia Hu
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Rd., Heping Dist., Tianjin, 300070, People's Republic of China
| | - Yujing Huang
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Rd., Heping Dist., Tianjin, 300070, People's Republic of China
| | - Long Dao
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Rd., Heping Dist., Tianjin, 300070, People's Republic of China
| | - Caifeng Zhang
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Rd., Heping Dist., Tianjin, 300070, People's Republic of China
| | - Yongzhe Liu
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Rd., Heping Dist., Tianjin, 300070, People's Republic of China
| | - Lina Wu
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Rd., Heping Dist., Tianjin, 300070, People's Republic of China
| | - Xutong Wang
- Division of Pharmacology and Toxicology, College of Pharmacy, University of Texas at Austin, Austin, TX, 78712, USA
| | - Weiling Yin
- Division of Pharmacology and Toxicology, College of Pharmacy, University of Texas at Austin, Austin, TX, 78712, USA
| | - Andrea C Gore
- Division of Pharmacology and Toxicology, College of Pharmacy, University of Texas at Austin, Austin, TX, 78712, USA
| | - Zengrong Sun
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Rd., Heping Dist., Tianjin, 300070, People's Republic of China.
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Coulibaly G, Ouédraogo-Yugbaré SO, Kouéta F, Yao LS, Savadogo H, Dao L, Leboucher B, Champion G, Kam L, Ouédraogo R, Yé D. [Perinatal asphyxia and acute renal insufficiency in Ouagadougou]. Arch Pediatr 2016; 23:249-54. [PMID: 26857645 DOI: 10.1016/j.arcped.2015.12.002] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 12/02/2015] [Accepted: 12/04/2015] [Indexed: 11/18/2022]
Abstract
AIM This study aimed to analyze acute renal failure in perinatal asphyxia (PNA) of term newborns in a sub-Saharan urban health center. PATIENTS AND METHODS The study was prospective, conducted from 1st June to 30th November 2013 on term newborns hospitalized at the centre hospitalier universitaire pédiatrique Charles-de-Gaulle for PNA. Renal insufficiency (RI) was defined by a serum creatinine greater than or equal to 90 μmol/L. RESULTS Eighty-five PNA cases were included, or 19.8% of newborns hospitalized in the study period. The sex ratio was 2.1. Thirty-eight newborns (44.7%) had RI. Their creatinine averaged 153.8±96.6 μmol/L. Twenty-six of 38 (68.4%) had brain damage in Sarnat stage 2 and 12 (31.6%) stage 3. Twelve newborns with RI (31.6%) had seizures. Transfontanellar echography revealed an abnormality in 30 cases (78.9%) of RI. Of the 38 newborns with renal failure, albuminuria was found in 21 cases (65.2%) and leukocyturia in 28 cases (73.7%). Renal function improved in 86.1% of cases. Newborns with initially normal serum creatinine had no RI during hospitalization. Six newborns (7.1%) died. CONCLUSION This study showed that acute RI is common during PNA most particularly in newborns with severe neurological impairment. In our context, earlier support for women in labor could help prevent PNA and therefore newborn acute RI.
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Affiliation(s)
- G Coulibaly
- Unité de formation et de recherche en sciences de la santé, Ouagadougou, Burkina Faso; Services de néphrologie et d'hémodialyse, centre hospitalier universitaire Yalgado Ouédraogo, Ouagadougou, Burkina Faso.
| | - S O Ouédraogo-Yugbaré
- Unité de formation et de recherche en sciences de la santé, Ouagadougou, Burkina Faso; Service de pédiatrie médicale, centre hospitalier universitaire pédiatrique Charles-de-Gaulle, Ouagadougou, Burkina Faso
| | - F Kouéta
- Unité de formation et de recherche en sciences de la santé, Ouagadougou, Burkina Faso; Service de pédiatrie médicale, centre hospitalier universitaire pédiatrique Charles-de-Gaulle, Ouagadougou, Burkina Faso
| | - L S Yao
- Service de pédiatrie médicale, centre hospitalier universitaire pédiatrique Charles-de-Gaulle, Ouagadougou, Burkina Faso
| | - H Savadogo
- Service de pédiatrie médicale, centre hospitalier universitaire pédiatrique Charles-de-Gaulle, Ouagadougou, Burkina Faso
| | - L Dao
- Unité de formation et de recherche en sciences de la santé, Ouagadougou, Burkina Faso; Service de pédiatrie médicale, centre hospitalier universitaire pédiatrique Charles-de-Gaulle, Ouagadougou, Burkina Faso
| | - B Leboucher
- Service de néonatalogie, Fédération de pédiatrie, CHU, 49933 Angers cedex 9, France
| | - G Champion
- Service de néphrologie pédiatrique, Fédération de pédiatrie, CHU, 49933 Angers cedex 9, France
| | - L Kam
- Unité de formation et de recherche en sciences de la santé, Ouagadougou, Burkina Faso; Service de pédiatrie, centre hospitalier universitaire Yalgado Ouédraogo, Ouagadougou, Burkina Faso
| | - R Ouédraogo
- Unité de formation et de recherche en sciences de la santé, Ouagadougou, Burkina Faso; Service de pédiatrie médicale, centre hospitalier universitaire pédiatrique Charles-de-Gaulle, Ouagadougou, Burkina Faso
| | - D Yé
- Unité de formation et de recherche en sciences de la santé, Ouagadougou, Burkina Faso; Service de pédiatrie médicale, centre hospitalier universitaire pédiatrique Charles-de-Gaulle, Ouagadougou, Burkina Faso
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Mukherjee S, Dao L, Tobin R, Dusio G, Fonkem E, Newell-Rogers MK. TMOD-07DIFFERENCES IN TUMOR GRAFT ACCEPTANCE OF 261 GLIOBLASTOMA MULTITFORME (GBM) CELL LINE BETWEEN WILD TYPE C57BL6, CD74 DEFICIENT, AND GAMMA DELTA TCR DEFICIENT MICE. Neuro Oncol 2015. [DOI: 10.1093/neuonc/nov237.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mukherjee S, Tobin R, Rogers S, Dao L, Kain J, Dusio G, Singel S, Fonkem E, Newell-Rogers MK. ET-41 * TEMOZOLOMIDE CYTOTOXICITY IS POTENTIATED BY METABOLIC MODIFICATIONS IN GLIOBLASTOMA MULTIFORME (GBM). Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou255.41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Dao L, Lucotte B, Glancy B, Chang LC, Hsu LY, Balaban RS. Use of independent component analysis to improve signal-to-noise ratio in multi-probe fluorescence microscopy. J Microsc 2014; 256:133-44. [PMID: 25159193 DOI: 10.1111/jmi.12167] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 12/31/2013] [Accepted: 07/15/2014] [Indexed: 11/28/2022]
Abstract
In conventional multi-probe fluorescence microscopy, narrow bandwidth filters on detectors are used to avoid bleed-through artefacts between probes. The limited bandwidth reduces the signal-to-noise ratio of the detection, often severely compromising one or more channels. Herein, we describe a process of using independent component analysis to discriminate the position of different probes using only a dichroic mirror to differentiate the signals directed to the detectors. Independent component analysis was particularly effective in samples where the spatial overlap between the probes is minimal, a very common case in cellular microscopy. This imaging scheme collects nearly all of the emitted light, significantly improving the image signal-to-noise ratio. In this study, we focused on the detection of two fluorescence probes used in vivo, NAD(P)H and ANEPPS. The optimal dichroic mirror cutoff frequency was determined with simulations using the probes spectral emissions. A quality factor, defined as the cross-channel contrast-to-noise ratio, was optimized to maximize signals while maintaining spatial discrimination between the probes after independent component analysis post-processing. Simulations indicate that a ∼3 fold increase in signal-to-noise ratio using the independent component analysis approach can be achieved over the conventional narrow-band filtering approach without loss of spatial discrimination. We confirmed this predicted performance from experimental imaging of NAD(P)H and ANEPPS in mouse skeletal muscle, in vivo. For many multi-probe studies, the increased sensitivity of this 'full bandwidth' approach will lead to improved image quality and/or reduced excitation power requirements.
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Affiliation(s)
- L Dao
- Laboratory of Cardiac Energetics, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, U.S.A.; Department of Electrical Engineering and Computer Science, The Catholic University of America, Washington, DC, U.S.A
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Kouéta F, Ouédraogo/Yugbaré SO, Dao L, Ouédraogo A, Ouédraogo/Traoré R, Sanou I, Yé D. [Infectious Etiologies of the acute diarrheas of the child from 0 to 5 years at the Pediatric University hospital Charles de Gaulle (Ouagadougou, Burkina Faso)]. Mali Med 2014; 29:66-71. [PMID: 30049130] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
To identify the infectious agents responsible for acute diarrheas in children from 0 to 5 years, with the aim of improving care, we led a cross-sectional prospective study at the Pediatric University hospital Charles de Gaulle from January 1st - November 30th, 2009. A sample of 103 children's stools hospitalized for acute diarrhea was analyzed. The average age of the patients was of 9.5 months and the most affected age bracket was the one from 0 to 12 months. More than half of the cases of diarrheas (60.2%) had an infectious etiology of which 33% of viral origin, 21.4% bacterial, 9.7% parasitic and in 9.7% of the cases a co-infection. In the viral diarrheas, rotavirus was observed in 17.5% of the cases and serotypes adenoviruses 40, 41 in 15.5% of the cases. The isolated bacteria were essentially represented by enteropathogenic Escherichia coli (21 cases). This bacterium had a strong resistance to amoxicillin, cotrimoxazole (90%) as well as in the amoxicillin+Clavulanic acid (57%). The ascendancy of rotavirus in the etiology of the acute diarrheas of children from 0 to 5 years hints to a need for vaccination against this infectious agent. Aside from the ineffectiveness of group A penicillins and of the cotrimoxazole against most of the isolated bacteria calls to medical prescribers to reconsider antibiotic treatment in the diarrheas of the children.
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Affiliation(s)
- F Kouéta
- Unité de Formation et de Recherche en Sciences de la Santé (UFR/SDS), Université de Ouagadougou, Burkina Faso
- Service de pédiatrie médicale du CHUP-CDG de Ouagadougou
| | - S O Ouédraogo/Yugbaré
- Unité de Formation et de Recherche en Sciences de la Santé (UFR/SDS), Université de Ouagadougou, Burkina Faso
- Service de pédiatrie médicale du CHUP-CDG de Ouagadougou
| | - L Dao
- Unité de Formation et de Recherche en Sciences de la Santé (UFR/SDS), Université de Ouagadougou, Burkina Faso
- Service de pédiatrie médicale du CHUP-CDG de Ouagadougou
| | - A Ouédraogo
- Service de pédiatrie médicale du CHUP-CDG de Ouagadougou
| | - R Ouédraogo/Traoré
- Unité de Formation et de Recherche en Sciences de la Santé (UFR/SDS), Université de Ouagadougou, Burkina Faso
- Laboratoire de bactériologie virologie du CHUP-CDG de Ouagadougou
| | - I Sanou
- Unité de Formation et de Recherche en Sciences de la Santé (UFR/SDS), Université de Ouagadougou, Burkina Faso
- Laboratoire de bactériologie virologie du Centre hospitalier universitaire yalgado Ouédraogo de Ouagadougou
| | - D Yé
- Unité de Formation et de Recherche en Sciences de la Santé (UFR/SDS), Université de Ouagadougou, Burkina Faso
- Service de pédiatrie médicale du CHUP-CDG de Ouagadougou
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Stephan RP, Dao L, Heybroek J. Is there a standard of care for intermediate and advanced stages of cutaneous T-cell lymphoma mycosis fungoides (CTCL-MF)? J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e18537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Kouéta F, Ouédraogo G, Dao L, Néboua D, Yé D. [Tuberculosis in children infected with HIV followed at Charles de Gaulle pediatric university hospital of Ouagadougou (Burkina Faso)]. Mali Med 2011; 26:44-49. [PMID: 22766094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
AIMS To study the epidemiological aspects, diagnosis and outcome of tuberculosis in children infected with HIV at the University Hospital Pediatric Charles de Gaulle, Ouagadougou. MATERIAL AND METHODS We conducted a retrospective chart review of children under 15 years followed from 2002 to 2008 for HIV infection. RESULTS The incidence of tuberculosis was 5.5%. The average patient age was 5 years with a female predominance of 63.6%. Prolonged fever, chronic cough and weight loss were the main reasons for consultation. Pulmonary tuberculosis was the most frequent clinical form with 11 cases. The contribution of the direct smear was low: 13.6%. At the radiological images of miliary (36.4%) were the most frequently encountered followed by non-parenchymal opacities systematized (31.8%). The lethality of co-infection TB-HIV was 18.2%. The prognostic factors were younger age, severe immunosuppression and orphan status or total mother. CONCLUSION Early detection of HIV infection in children and the capacity of TB diagnosis should improve the management of co-infection in a pediatric setting.
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Affiliation(s)
- F Kouéta
- Unité de Formation et de Recherche en Sciences de la Santé (UFR/SDS), Université de Ouagadougou, Burkina Faso.
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Long PM, Wesley UV, Jaworski DM, Rana M, Kiehl TR, So K, Gould P, Ajewung N, Kamnasaran D, Emmett MR, Wang X, Marshall AG, Ji Y, Fokt I, Skora S, Conrad CA, Priebe W, Zhu H, Cao X, Keir S, Ali-Osman F, Lo HW, Da Fonseca CO, Arun V, Wiley JC, Kaur H, Guha A, Fenton K, Abdelwahab MG, Stafford P, Rho JM, Preul MC, Scheck AC, Brossier NM, Carroll SL, Gajadhar A, Guha A, Mukherjee J, Wolf A, Hawkins C, Guha A, Costa P, Cardoso ALC, de Almeida LP, de Lima MCP, Canoll P, Bruce J, Lavon I, Granit A, Einstein O, Ben-Hur T, Siegal T, Pang JC, Poon WS, Zhou L, Ng HK, Rovin RA, Lawrence JE, Segula JJ, Winn RJ, Patil S, Burzynski SR, Mrowczynski E, Grela K, Cheng S, Liu K, Feng H, Bacho R, Kazlauskas A, Smith EM, Symes K, Hu B, Lee CY, Fotovati A, Dunn SE, Proescholdt MA, Storr EM, Lohmeier A, Brawanski A, Hu B, Feng H, Jarzynka MJ, Liu K, Ravichandran KS, Vuori K, Tang C, Nshikawa R, Johns TG, Furnari FB, Cavenee WK, Cheng S, Zhong J, O'Neill GM, Deleyrolle LP, Rahman M, Dunbar EM, Caldeira MA, Reynolds BA, Liu X, Yacyshyn S, Dasgupta B, Han X, Yang X, Wheeler CG, Filippova N, Langford CP, Ding Q, Fathallah HM, Gillespie GY, Nabors LB, Davidson TB, Gortalum F, Ji L, Engell K, Sposto R, Asgharzadeh S, Erdreich-Epstein A, Lawn SO, Weiss S, Senger D, Forsyth P, Latha K, Chumbalkar V, Li M, Gururaj A, Hwang Y, Maywald R, Dakeng S, Dao L, Baggerly K, Sawaya R, Aldape K, Cavenee W, Furnari F, Bogler O, Hwang Y, Chumbalkar V, Latha K, Bogler O, Gururaj A, Bogler O, Chumbalkar V, Arumugam J, Dao L, Baggerly K, Priebe W, Bogler O, Sim H, Pineda CA, Pan Y, Hu B, Viapiano MS, Van Schaick JA, Akagi K, Burkett S, DiFabio C, Tuskan R, Walrath J, Reilly K, Dai B, Jing Z, Kang SH, Li D, Xie K, Huang S, Gong X, Vuong Y, Bota DA, Stegh AH, Furnari F, Inda MDM, Bonavia R, Mukasa A, Narita Y, Sah D, Vandenberg S, Brennan C, Johns T, Bachoo R, Hadwiger P, Tan P, Tan P, DePinho R, Cavenee W, Kusne Y, Meerson A, Rushing EJ, Yang W, Aldape K, McDonough W, Kislin K, Loftus JC, Berens M, Lu Z, Ghosh S, Verma A, Zhou H, Chin S, Bruggers C, Kestle J, Khatua S, Broekman ML, Maas NS, Skog J, Breakefield XO, Sena-Esteves M, de Vrij J, Lamfers M, Maas N, Dirven C, Esteves M, Broekman M, Chidambaram A, Dumur CI, Graf M, Vanmeter TE, Fillmore HL, Broaddus WC, Silber J, Ozawa T, Kastenhuber E, Djaballah H, Holland EC, Huse JT, Wolf A, Agnihotri S, Munoz D, Hawkins C, Guha A, Han JE, Albesiano E, Pradilla G, Lim M, Alshami J, Sabau C, Seyed Sadr M, Anan M, Seyed Sadr E, Siu V, Del Maestro R, Trinh G, Le P, Petrecca K, Sonabend AM, Soderquist C, Lei L, Guarnieri P, Leung R, Yun J, Sisti J, Castelli M, Bruce S, Bruce R, Ludwig T, Rosenfeld S, Bruce JN, Canoll P, Phillips JJ, Huillard E, Polley MY, Rosen SD, Rowitch DH, Werb Z, Sarkar C, Jha P, Pathak P, Suri V, Sharma MC, Chattopadhyay P, Chosdol K, Suri A, Gupta D, Mahapatra AK, Kapoor GS, Zhan Y, Boockvar JA, O'Rourke DM, Kwatra MM, Kim JW, Park CK, Han JH, Park SH, Kim SK, Jung HW, Narayanan R, Levin BS, Maeder ML, Joung JK, Nutt CL, Louis DN, Dudley A, Jayaram P, Pei Z, Shi X, Laterra J, Watkins PA, Mawrin C, Rempel SA, McClung HM, McFarland BC, Nozell SE, Huszar D, Benveniste EN, Burton T, Eisenstat DD, Gibson SB, Lukiw WJ, Cui JG, Li YY, Zhao Y, Culicchia F, See W, Pieper R, Luchman A, Stechishin O, Nguyen S, Kelly J, Blough M, Cairncross G, Weiss S, Shah SR, Mohyeldin A, Adams H, Garzon-Muvdi T, Aprhys C, Quinones-Hinojosa A, Weeks AC, Restrepo A, Arun V, Ivanchuk S, Smith C, Rutka JT, Sengupta R, Yang L, Burbassi S, Zhang B, Markant SL, Yang ZJ, Meucci O, Wechsler-Reya RJ, Rubin JB, Wykosky J, Mukasa A, Chin L, Cavenee W, Furnari F, Auvergne RM, Sim FJ, Wang S, Chandler-Militello D, Burch J, Li X, Bennet A, Mohile N, Pilcher W, Walter K, Johnson M, Achanta P, Quinones-Hinojosa A, Natesan S, Goldman SA, Beauchamp AS, Gibo DM, Wykosky J, Debinski W, Jiang H, Martin V, Gomez-Manzano C, Johnson DG, Alonso M, White EJ, Xu J, McDonnell T, Shinojima N, Fueyo J, Sandhya Rani MR, Huang P, Prayson R, Hedayat H, Sloan AE, Novacki A, Ahluwalia MS, Tipps R, Gladson CL, Liu JL, Mao Z, Xu J, Fueyo J, Yung WKA, Bhat K, Salazar K, Balasubramaniyan V, Vaillant B, Hollingsworth F, Gumin J, Diefes K, Patel D, Lang F, Colman H, Aldape K, Parsyan A, Shahbazian D, Alain T, Martineau Y, Petroulakis E, Larsson O, Gkogkas C, Topisirovic I, Mathonnet G, Tettweiler G, Hellen C, Pestova T, Svitkin Y, Sonenberg N, Zerrouqi A, Pyrzynska B, Van Meir E, Twitty GB, Nozell SE, Hong SW, Benveniste EN, Lee HK, Finniss S, Xiang C, Cazacu S, Brodie C, Ginn KF, Wise A, Farassati F, Nozell SE, Hong SW, Twitty GB, McFarland BC, Benveniste EN, Brown C, Barish M, deCarvalho AC, Hasselbach L, Nelson K, Lemke N, Schultz L, Mikkelsen T, Onvani S, Kongkham P, Smith CA, Rutka JT, Bier A, Finniss S, Hershkovitz H, Kahana S, Xiang C, Cazacu S, Decarvalho A, Brodie C, Massey SC, Swanson KR, Canoll P. Cell Biology and Signaling. Neuro Oncol 2010. [DOI: 10.1093/neuonc/noq116.s2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yé D, Kaboré S, Kouéta F, Tapsoba T, Dao L, Sawadogo A. [Pediatric tetanus continues to be a current issue: 14 cases encountered in the CHUP-CDG pediatric hospital of Ouagadougou, Burkina Faso]. Arch Pediatr 2008; 15:1821-2. [PMID: 18963874 DOI: 10.1016/j.arcped.2008.09.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2008] [Revised: 07/23/2008] [Accepted: 09/08/2008] [Indexed: 11/18/2022]
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Ye D, Nacro N, Koueta F, Dao L, Kabore A, Sawadogo A. Soins aux nouveau-nés et aux nourrissons en milieu traditionnel: enquête menée auprès de 502 couples mère–enfant à Ouagadougou au Burkina Faso. Arch Pediatr 2007; 14:1112-3. [PMID: 17611087 DOI: 10.1016/j.arcped.2007.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2007] [Accepted: 06/01/2007] [Indexed: 10/23/2022]
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Takeoka GR, Dao L, Flessa S, Gillespie DM, Jewell WT, Huebner B, Bertow D, Ebeler SE. Processing effects on lycopene content and antioxidant activity of tomatoes. J Agric Food Chem 2001; 49:3713-3717. [PMID: 11513653 DOI: 10.1021/jf0102721] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Consumption of tomato products has been associated with decreased risk of some cancer types, and the tomato antioxidant, lycopene, is thought to play an important role in the observed health effects. In this study, four carotenoids, trans-lycopene, phytofluene, phytoene, and zeta-carotene, were quantified in tomato products. Samples of raw tomatoes, tomato juice after hot break scalder, and final paste were obtained from two different processing plants over two years. Comparison of carotenoid levels throughout processing indicated that lycopene losses during processing of tomatoes into final paste (25-30 degrees Brix) ranged from 9 to 28%. The initial Brix level of the raw tomatoes appeared to influence the amount of lycopene loss that occurred, possibly due to the differences in processing time required to achieve the final desired Brix level of the paste. In general, no consistent changes in the other carotenoids were observed as a function of processing. The antioxidant activity of fresh tomatoes, tomato paste, and three fractions obtained from these products (i.e., aqueous, methanol, and hexane fractions) was also determined. In both a free radical quenching assay and a singlet oxygen quenching assay, significant antioxidant activity was found in both the hexane fraction (containing lycopene) and the methanol fraction, which contained the phenolic antioxidants caffeic and chlorogenic acid. The results suggest that in addition to lycopene, polyphenols in tomatoes may also be important in conferring protective antioxidative effects.
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Affiliation(s)
- G R Takeoka
- Western Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, Albany, California, USA
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25
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Takeoka G, Dao L, Wong RY, Lundin R, Mahoney N. Identification of benzethonium chloride in commercial grapefruit seed extracts. J Agric Food Chem 2001; 49:3316-3320. [PMID: 11453769 DOI: 10.1021/jf010222w] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Commercial grapefruit seed extracts (GSE) were extracted with chloroform. The solvent was evaporated, and the resulting solid was subsequently analyzed by high-performance liquid chromatography, electrospray ionization mass spectrometry, nuclear magnetic resonance (NMR) spectroscopy, and elemental analysis (by proton-induced X-ray emission [PIXE] analysis). The main constituent was identified as benzethonium chloride, a synthetic antimicrobial agent commonly used in cosmetics and other topical applications. This compound comprised 8.03% (n = 2) of the liquid GSE sample. Higher amounts of benzethonium chloride were found in powder GSE samples.
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Affiliation(s)
- G Takeoka
- Western Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 800 Buchanan Street, Albany, California 94710, USA.
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26
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Abstract
starting by 6 h following diazepam injection and returning to approximately control values by 24 h. In situ hybridization showed elevated FGF-2 mRNA labeling in the hippocampal formation, mostly in the pyramidal layer of the CA1 and CA2 subfields and in the dentate gyrus hilar region. These results indicate that diazepam treatment up-regulates FGF-2 expression in select regions of the brain and suggest that GABA may promote neuroplasticity in concert with FGF-2.
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Affiliation(s)
- F Gómez-Pinilla
- Department of Physiological Science, University of California, Los Angeles, Los Angeles, CA 90095, USA.
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Takeoka G, Dao L, Teranishi R, Wong R, Flessa S, Harden L, Edwards R. Identification of three triterpenoids in almond hulls. J Agric Food Chem 2000; 48:3437-3439. [PMID: 10956130 DOI: 10.1021/jf9908289] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Three triterpenoids, betulinic acid, oleanolic acid, and ursolic acid, were isolated as their methyl esters (treatment with diazomethane) from diethyl ether extracts of almond hulls (Nonpareil variety) using flash chromatography and preparative high-performance liquid chromatography. The triterpenoids, which comprised approximately 1% of the hulls, were characterized using chromatographic and spectroscopic methods. These studies demonstrate that almond hulls are a rich source of these triterpenoids, which have reported anti-inflammatory, anti-HIV, and anti-cancer activities.
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Affiliation(s)
- G Takeoka
- Western Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, Albany, California 94710, USA.
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Sawadogo A, Koueta F, Sanou I, Kam KL, Dao L, Reinhardt M, Queloz J. [Pleuropulmonary staphylococcal infection in infants, in a hospital environment in Ouagadougou (Burkina Faso)]. Sante 1999; 9:209-13. [PMID: 10623866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
We observed 36 cases of pleuropulmonary staphylococcal infection (PPS) in infants aged 0 to 30 months, during a prospective study carried out between April 1st 1995 and March 31 1996 at the Pediatrics Department of Ouagadougou University Hospital. PPS accounted for 0.5% of all hospital admissions and 11.6% of all acute basal respiratory infections in children aged less than 30 months. Slightly more boys than girls were affected, with a sex ratio of 1.2. We identified the classic triad of symptoms: cough-fever-polypnea, associated with abdominal ballooning and a change in general condition. On X rays, the typical images showing parenchymatous bubbles were the second most frequent observation (27.8%) after parenchymatous opacities (69.5%). The most frequently used antibiotics were oxacillin (Bristopen), gentamycin (Gentallin) and cefuroxime-axetil (Zinnat). The prognosis of PPS is poor, with a high mortality rate (27.8%) and a risk of pleural recurrence. Being very young, late hospitalization, malnutrition and leukopenia were identified as factors indicating a poor prognosis. Recygling of health care personnel for the management of acute respiratory infections, a decrease in malnutrition and an improvement in vaccination cover are essential if the mortality and morbidity of acute respiratory infections, and PPS in particular, are to be reduced.
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Affiliation(s)
- A Sawadogo
- Service de pédiatrie, CHU de Ouagadougou, 03 BP 7022, Ouagadougou 03, Burkina Faso
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Qian M, Dao L, Debus RJ, Burnap RL. Impact of mutations within the putative Ca2+-binding lumenal interhelical a-b loop of the photosystem II D1 protein on the kinetics of photoactivation and H2O-oxidation in Synechocystis sp. PCC6803. Biochemistry 1999; 38:6070-81. [PMID: 10320333 DOI: 10.1021/bi982331i] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mutations D1-D59N and D1-D61E in the putative Ca2+-binding lumenal interhelical a-b loop of the photosystem II (PSII) D1 protein [Chu, H. A., Nguyen, A. P., and Debus (1995), Biochemistry 34, 5839-5858] were further characterized in terms of S-state cycling and photoactivation. Bare platinum electrode measurements of centrifugally deposited O2-evolving membranes isolated from the a-b loop mutants demonstrated a retarded appearance of O2 following single turnover flashes, although not to the extent of retardation seen in the Deltapsb0 mutant, which lacks the extrinsic manganese-stabilizing protein (MSP). Double flash measurements indicate that retarded O2 release in mutants coincides with a decrease in overall PSII turnover during the S3-[S4]-S0 transition. S2 and S3 decay measurements in the isolated membranes indicate that D1-D59N and D1-D61E have faster decays of these higher S-states in contrast to slowed decays in the Deltapsb0 mutant. Measurements of the flash interval dependence of photoactivation indicate that intermediates of photoactivation [light-dependent assembly of the (Mn)4 complex] are highly destabilized in the a-b loop mutants compared to both DeltapsbO and the wild-type: flash intervals of greater than 2 s result in the nearly complete decay of unstable photointermediate(s) in the D1-D59N and D1-D61E samples, whereas a similar loss does not occur until intervals even greater than 10 s in the DeltapsbO and wild-type samples. These results are consistent with a role for the residues D1-D59 and D1-D61 in modulating the redox properties of the higher S-states and, also, possibly in the binding the calcium ion involved in photoactivation.
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Affiliation(s)
- M Qian
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma 74078, USA
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Abstract
We have explored the possibility that the GABA system can influence the expression of FGF-2 in the spinal cord. The GABA agonist diazepam was systemically injected in adult rats, and the expression of FGF-2 was examined in the cervical spinal cord region between 6 h and 7 days post-injection. Results of nuclease protection assays showed increases in FGF-2 mRNA, starting by 6 h and returning to approximately control values by 3 days. There was an increase in the density of FGF-2 immunostained astrocyte-like cells between 6 h and 3 days. Results showing that diazepam up-regulates FGF-2 expression in the spinal cord suggest that GABA may promote neuroplasticity in concert with FGF-2.
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Affiliation(s)
- F Gómez-Pinilla
- Department of Physiological Science, University of California, Los Angeles 90095-1527, USA
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Jakubiec B, Marois Y, Zhang Z, Roy R, Sigot-Luizard MF, Dugré FJ, King MW, Dao L, Laroche G, Guidoin R. In vitro cellular response to polypyrrole-coated woven polyester fabrics: potential benefits of electrical conductivity. J Biomed Mater Res 1998; 41:519-26. [PMID: 9697023 DOI: 10.1002/(sici)1097-4636(19980915)41:4<519::aid-jbm2>3.0.co;2-f] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Electrically conducting polypyrrole-treated films have recently been shown to influence the morphology and function of mammalian cells in vitro. This type of polymer represents a possible alternative biomaterial for use in vascular implantation. The present study compared the in vitro biocompatibility of the five different polyester woven fabrics having increasing levels of electrical conductivity ranging from 4.5 x 10(4) to 123 omega/square with that of low density polyethylene and polydimethylsiloxane primary reference materials. Biocompatibility was measured in terms of four different types of in vitro cellular response, including (a) an indirect and (b) a direct control organotypic culture assay using endothelial cells, (c) a polymorphonuclear (PMN) cell activation study using flow-cytometric measurements of CD11/CD18 integrin molecule expression, and (d) a semiquantification of interleukin (IL)-6 mRNA expression on monocytes/macrophages using reverse-transcriptase polymerase chain reaction. The organotypic culture study revealed that the fabrics with high levels of conductivity exhibited lower cell migration, proliferation, and viability. The PMN activation study of blood from 10 healthy adult donors demonstrated that the two most conductive fabrics were able to identify the more reactive donors. The levels of IL-6 mRNA expression by monocytes/macrophages decreased as the conductivity level of the fabrics increased. The results of the present study therefore indicate that high levels of conductivity (< 200 omega/square) on polyester fabrics are detrimental to the growth, migration, and viability of endothelial cells; induce elevated PMN activation; and affect the intracellular metabolism of monocytes. They also point to a specific range of conductivity (10(3) < 10(4) omega/square) which is associated with an optimum in vitro cellular response.
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Affiliation(s)
- B Jakubiec
- Centre de recherche en rhumatologie et immunologie, Pavillon CHUL, CHUQ, Québec, Canada
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Abstract
Clinical and experimental evidence indicate that physical activity has a positive impact on brain function; however, the molecular bases for how exercise affects the structure and function of the brain are largely unknown. We have investigated the influences of variable periods of voluntary wheel-running on the expression of basic fibroblast growth factor and its mRNA in various brain regions. Nuclease protection assays revealed that the hippocampus was the only region examined exhibiting changes in FGF-2 mRNA as a result of exercise. FGF-2 mRNA increased to reach a peak by the 4th night of wheel-running. FGF-2 immunoreactivity, normally located in the perinuclear area of astrocytes, following exercise became stronger and appeared to spread to the cytoplasm and processes of astrocytes. Quantification of the FGF-2-immunoreactive astrocytes showed an increase in density between 2 and 4 nights of running in discrete regions of the hippocampus. These results demonstrate that exercise regulates FGF-2 expression and suggest that growth factors are likely mediators of the positive effects of exercise on the brain.
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Affiliation(s)
- F Gómez-Pinilla
- Department of Neurology and Institute for Brain Aging and Dementia, University of California at Irvine, 92697-4540, USA.
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Hurtado I, Medina JD, Dao L, Urbina C. Studies on the skin-sensitizing properties of the "pepeo" tree, Mauria puberula (Anacardiaceae). J Am Acad Dermatol 1982; 7:341-5. [PMID: 7130493 DOI: 10.1016/s0190-9622(82)80314-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Nemoto T, Han T, Minowada J, Angkur V, Chamberlain A, Dao L. Cell-mediated immune status of breast cancer patients: evaluation by skin tests, lymphocyte stimulation, and counts of rosette-forming cells. J Natl Cancer Inst 1974; 53:641-5. [PMID: 4606319 DOI: 10.1093/jnci/53.3.641] [Citation(s) in RCA: 72] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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Dao L. [Wounds inflicted by two types of anteaters (Mirmecophaga tridactyla and Tamandua tetradactyla)]. Dermatol Int 1968; 7:204-8. [PMID: 5753563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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36
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Dao L. [Mycoses in the Llanos region of Venezuela]. Dermatol Int 1967; 6:199-202. [PMID: 5599060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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37
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Dao L. [Wasp stings in rural areas of Venezuela]. Dermatol Int 1967; 6:144-8. [PMID: 5590114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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38
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Dao L. [Dermatitis caused by plants in the plains of VENEZUELA]. Dermatol Int 1967; 6:77-81. [PMID: 5585745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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39
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Dao L. [Lesions produced by Potamotrygonidae in Venezuelan rivers]. Dermatol Int 1965; 4:219-24. [PMID: 5896474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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40
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Dao L. [Tropical diseases in petroleum workers. Experiences of a Venezuelan physician in Venezuelan petroleum camps]. Gac Med Caracas 1965; 73:635-67. [PMID: 5887506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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41
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Dao L. [Treatment of necatoriasis with bephenium hydroxynaphthoate]. Gac Med Caracas 1965; 73:401-6. [PMID: 5880851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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