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  1. Article ; Online: Recent advances in diabetes treatments and their perioperative implications.

    Kuzulugil, Deniz / Papeix, Gabrielle / Luu, Judy / Kerridge, Ross K

    Current opinion in anaesthesiology

    2019  Volume 32, Issue 3, Page(s) 398–404

    Abstract: Purpose of review: The implications for perioperative management of new oral antihyperglycemic medications and new insulin treatment technologies are reviewed.: Recent findings: The preoperative period represents an opportunity to optimize glycemic ... ...

    Abstract Purpose of review: The implications for perioperative management of new oral antihyperglycemic medications and new insulin treatment technologies are reviewed.
    Recent findings: The preoperative period represents an opportunity to optimize glycemic control and potentially to reduce adverse outcomes. There is now general consensus that the optimal blood glucose target for hospitalized patients is approximately 106-180 mg/dl (6-10 mmol/l). Recommendations for the management of antihyperglycemic medications vary among national guidelines. It may not be necessary to cease all antihyperglycemic agents prior to surgery. Sodium-glucose cotransporter 2 inhibitors (SGLT2i) are associated with higher rates of ketoacidosis especially in acutely unwell and postsurgical patients. The clinical practice implications of new insulin formulations, and new systems for insulin delivery, are not clear. The optimal perioperative management of these will vary depending on local institutional factors such as staff skills and existing clinical practices. Improved hospital care delivery standards, quality assurance, process improvements, consistency in clinical practice, and coordinated multidisciplinary teamwork should be a major focus for improving outcomes of perioperative patients with diabetes.
    Summary: Sulfonylureas and SGLT2i should be ceased before moderate or major surgery. Other oral antihyperglycemic therapies may be continued or ceased. Complex patients and/or new therapies require specialized multidisciplinary management.
    MeSH term(s) Administration, Oral ; Blood Glucose/analysis ; Blood Glucose/drug effects ; Blood Glucose/physiology ; Diabetes Mellitus/blood ; Diabetes Mellitus/drug therapy ; Humans ; Hypoglycemic Agents/administration & dosage ; Hypoglycemic Agents/adverse effects ; Insulin/administration & dosage ; Patient Care Planning/organization & administration ; Patient Care Team/organization & administration ; Perioperative Care/methods ; Perioperative Care/standards ; Postoperative Complications/blood ; Postoperative Complications/diagnosis ; Postoperative Complications/etiology ; Postoperative Complications/prevention & control ; Practice Guidelines as Topic ; Surgical Procedures, Operative/adverse effects
    Chemical Substances Blood Glucose ; Hypoglycemic Agents ; Insulin
    Language English
    Publishing date 2019-02-20
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 645203-6
    ISSN 1473-6500 ; 0952-7907
    ISSN (online) 1473-6500
    ISSN 0952-7907
    DOI 10.1097/ACO.0000000000000735
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Correlation Between Interest in COVID-19 Hair Loss and COVID-19 Surges: Analysis of Google Trends.

    Han, Joseph / Kamat, Samir / Agarwal, Aneesh / O'Hagan, Ross / Tukel, Connor / Owji, Shayan / Ghalili, Sabrina / Luu, Yen / Dautriche Svidzinski, Cula / Abittan, Brian J / Ungar, Jonathan / Gulati, Nicholas

    JMIR dermatology

    2022  Volume 5, Issue 2, Page(s) e37271

    Language English
    Publishing date 2022-04-27
    Publishing country Canada
    Document type Journal Article
    ISSN 2562-0959
    ISSN (online) 2562-0959
    DOI 10.2196/37271
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Tunneling nanotubes, TNT, communicate glioblastoma with surrounding non-tumor astrocytes to adapt them to hypoxic and metabolic tumor conditions.

    Valdebenito, Silvana / Malik, Shaily / Luu, Ross / Loudig, Olivier / Mitchell, Megan / Okafo, George / Bhat, Krishna / Prideaux, Brendan / Eugenin, Eliseo A

    Scientific reports

    2021  Volume 11, Issue 1, Page(s) 14556

    Abstract: Cell-to-cell communication is essential for the development and proper function of multicellular systems. We and others demonstrated that tunneling nanotubes (TNT) proliferate in several pathological conditions such as HIV, cancer, and neurodegenerative ... ...

    Abstract Cell-to-cell communication is essential for the development and proper function of multicellular systems. We and others demonstrated that tunneling nanotubes (TNT) proliferate in several pathological conditions such as HIV, cancer, and neurodegenerative diseases. However, the nature, function, and contribution of TNT to cancer pathogenesis are poorly understood. Our analyses demonstrate that TNT structures are induced between glioblastoma (GBM) cells and surrounding non-tumor astrocytes to transfer tumor-derived mitochondria. The mitochondrial transfer mediated by TNT resulted in the adaptation of non-tumor astrocytes to tumor-like metabolism and hypoxia conditions. In conclusion, TNT are an efficient cell-to-cell communication system used by cancer cells to adapt the microenvironment to the invasive nature of the tumor.
    MeSH term(s) Astrocytes/metabolism ; Astrocytes/pathology ; Cell Communication ; Cell Hypoxia ; Cell Line, Tumor ; Cells, Cultured ; Coculture Techniques ; DNA, Mitochondrial ; Glioblastoma/pathology ; Humans ; Laser Capture Microdissection ; Microscopy, Electron, Transmission ; Mitochondria/genetics ; Mitochondria/pathology ; Oxidative Stress ; Tumor Microenvironment
    Chemical Substances DNA, Mitochondrial
    Language English
    Publishing date 2021-07-15
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-021-93775-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Mobility of Histidine Side Chains Analyzed with

    Kemme, Catherine A / Luu, Ross H / Chen, Chuanying / Pletka, Channing C / Pettitt, B Montgomery / Iwahara, Junji

    The journal of physical chemistry. B

    2019  Volume 123, Issue 17, Page(s) 3706–3710

    Abstract: Due to chemical exchange, the mobility of histidine (His) side chains of proteins is typically difficult to analyze by NMR spectroscopy. Using an NMR approach that is uninfluenced by chemical exchange, we investigated internal motions of the His ... ...

    Abstract Due to chemical exchange, the mobility of histidine (His) side chains of proteins is typically difficult to analyze by NMR spectroscopy. Using an NMR approach that is uninfluenced by chemical exchange, we investigated internal motions of the His imidazole NH groups that directly interact with DNA phosphates in the Egr-1 zinc-finger-DNA complex. In this approach, the transverse and longitudinal cross-correlation rates for
    MeSH term(s) DNA/chemistry ; Histidine/analysis ; Magnetic Resonance Spectroscopy ; Models, Molecular ; Molecular Structure ; Nitrogen Isotopes ; Particle Size ; Surface Properties ; Zinc Fingers
    Chemical Substances Nitrogen Isotopes ; Histidine (4QD397987E) ; DNA (9007-49-2)
    Language English
    Publishing date 2019-04-18
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ISSN 1520-5207
    ISSN (online) 1520-5207
    DOI 10.1021/acs.jpcb.9b03132
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Tunneling nanotubes, TNT, communicate glioblastoma with surrounding non-tumor astrocytes to adapt them to hypoxic and metabolic tumor conditions

    Silvana Valdebenito / Shaily Malik / Ross Luu / Olivier Loudig / Megan Mitchell / George Okafo / Krishna Bhat / Brendan Prideaux / Eliseo A. Eugenin

    Scientific Reports, Vol 11, Iss 1, Pp 1-

    2021  Volume 18

    Abstract: Abstract Cell-to-cell communication is essential for the development and proper function of multicellular systems. We and others demonstrated that tunneling nanotubes (TNT) proliferate in several pathological conditions such as HIV, cancer, and ... ...

    Abstract Abstract Cell-to-cell communication is essential for the development and proper function of multicellular systems. We and others demonstrated that tunneling nanotubes (TNT) proliferate in several pathological conditions such as HIV, cancer, and neurodegenerative diseases. However, the nature, function, and contribution of TNT to cancer pathogenesis are poorly understood. Our analyses demonstrate that TNT structures are induced between glioblastoma (GBM) cells and surrounding non-tumor astrocytes to transfer tumor-derived mitochondria. The mitochondrial transfer mediated by TNT resulted in the adaptation of non-tumor astrocytes to tumor-like metabolism and hypoxia conditions. In conclusion, TNT are an efficient cell-to-cell communication system used by cancer cells to adapt the microenvironment to the invasive nature of the tumor.
    Keywords Medicine ; R ; Science ; Q
    Subject code 610
    Language English
    Publishing date 2021-07-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Potential role of DNA methylation as a facilitator of target search processes for transcription factors through interplay with methyl-CpG-binding proteins.

    Kemme, Catherine A / Marquez, Rolando / Luu, Ross H / Iwahara, Junji

    Nucleic acids research

    2017  Volume 45, Issue 13, Page(s) 7751–7759

    Abstract: Eukaryotic genomes contain numerous non-functional high-affinity sequences for transcription factors. These sequences potentially serve as natural decoys that sequester transcription factors. We have previously shown that the presence of sequences ... ...

    Abstract Eukaryotic genomes contain numerous non-functional high-affinity sequences for transcription factors. These sequences potentially serve as natural decoys that sequester transcription factors. We have previously shown that the presence of sequences similar to the target sequence could substantially impede association of the transcription factor Egr-1 with its targets. In this study, using a stopped-flow fluorescence method, we examined the kinetic impact of DNA methylation of decoys on the search process of the Egr-1 zinc-finger protein. We analyzed its association with an unmethylated target site on fluorescence-labeled DNA in the presence of competitor DNA duplexes, including Egr-1 decoys. DNA methylation of decoys alone did not affect target search kinetics. In the presence of the MeCP2 methyl-CpG-binding domain (MBD), however, DNA methylation of decoys substantially (∼10-30-fold) accelerated the target search process of the Egr-1 zinc-finger protein. This acceleration did not occur when the target was also methylated. These results suggest that when decoys are methylated, MBD proteins can block them and thereby allow Egr-1 to avoid sequestration in non-functional locations. This effect may occur in vivo for DNA methylation outside CpG islands (CGIs) and could facilitate localization of some transcription factors within regulatory CGIs, where DNA methylation is rare.
    MeSH term(s) Binding Sites ; CpG Islands ; DNA/chemistry ; DNA/genetics ; DNA/metabolism ; DNA Methylation ; Early Growth Response Protein 1/metabolism ; Humans ; Kinetics ; Methyl-CpG-Binding Protein 2/chemistry ; Methyl-CpG-Binding Protein 2/genetics ; Methyl-CpG-Binding Protein 2/metabolism ; Models, Biological ; Protein Domains ; Recombinant Proteins/chemistry ; Recombinant Proteins/genetics ; Recombinant Proteins/metabolism ; Transcriptional Activation ; Zinc Fingers/genetics
    Chemical Substances EGR1 protein, human ; Early Growth Response Protein 1 ; MECP2 protein, human ; Methyl-CpG-Binding Protein 2 ; Recombinant Proteins ; DNA (9007-49-2)
    Language English
    Publishing date 2017-07-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 186809-3
    ISSN 1362-4962 ; 1362-4954 ; 0301-5610 ; 0305-1048
    ISSN (online) 1362-4962 ; 1362-4954
    ISSN 0301-5610 ; 0305-1048
    DOI 10.1093/nar/gkx387
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Initial clinical experience using a novel Pd-103 surface applicator for the treatment of retroperitoneal and abdominal wall malignancies.

    Zhen, Heming / Turian, Julius V / Sen, Neilayan / Luu, Minh B / Abrams, Ross A / Wang, Dian

    Advances in radiation oncology

    2017  Volume 3, Issue 2, Page(s) 216–220

    Language English
    Publishing date 2017-12-11
    Publishing country United States
    Document type Case Reports
    ISSN 2452-1094
    ISSN 2452-1094
    DOI 10.1016/j.adro.2017.11.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Role of Tunneling Nanotube-like Structures during the Early Events of HIV Infection: Novel Features of Tissue Compartmentalization and Mechanism of HIV Spread.

    Okafo, George / Valdebenito, Silvana / Donoso, Maribel / Luu, Ross / Ajasin, David / Prideaux, Brendan / Gorantla, Santhi / Eugenin, Eliseo A

    Journal of immunology (Baltimore, Md. : 1950)

    2020  Volume 205, Issue 10, Page(s) 2726–2741

    Abstract: HIV has become a chronic disease despite the effective use of antiretroviral therapy (ART). However, the mechanisms of tissue colonization, viral evolution, generation of viral reservoirs, and compartmentalization are still a matter of debate due to the ... ...

    Abstract HIV has become a chronic disease despite the effective use of antiretroviral therapy (ART). However, the mechanisms of tissue colonization, viral evolution, generation of viral reservoirs, and compartmentalization are still a matter of debate due to the challenges involved in examining early events of infection at the cellular and molecular level. Thus, there is still an urgent need to explore these areas to develop effective HIV cure strategies. In this study, we describe the early events of tissue colonization and compartmentalization as well as the role of tunneling nanotube-like structures during viral spread in the presence and absence of effective antiretroviral treatment. To examine these mechanisms, NOD/SCID IL-2 RG
    MeSH term(s) Amides/administration & dosage ; Animals ; Anti-Retroviral Agents/administration & dosage ; CD4-Positive T-Lymphocytes/cytology ; CD4-Positive T-Lymphocytes/immunology ; CD4-Positive T-Lymphocytes/virology ; Disease Models, Animal ; HIV Infections/blood ; HIV Infections/drug therapy ; HIV Infections/immunology ; HIV Infections/virology ; HIV-1/immunology ; HIV-1/isolation & purification ; HIV-1/pathogenicity ; Hematopoietic Stem Cell Transplantation ; Humans ; Interleukin Receptor Common gamma Subunit/genetics ; Mice ; Mice, Knockout ; Quaternary Ammonium Compounds/administration & dosage ; Transplantation Chimera ; Viral Load ; Virus Integration/drug effects ; Virus Integration/immunology ; Virus Internalization/drug effects ; Virus Replication/drug effects ; Virus Replication/immunology
    Chemical Substances Amides ; Anti-Retroviral Agents ; Il2rg protein, mouse ; Interleukin Receptor Common gamma Subunit ; Quaternary Ammonium Compounds ; TAK 779 (BQW1Y9KIIP)
    Language English
    Publishing date 2020-10-09
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 3056-9
    ISSN 1550-6606 ; 0022-1767 ; 1048-3233 ; 1047-7381
    ISSN (online) 1550-6606
    ISSN 0022-1767 ; 1048-3233 ; 1047-7381
    DOI 10.4049/jimmunol.2000803
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Thermodynamic Additivity for Impacts of Base-Pair Substitutions on Association of the Egr-1 Zinc-Finger Protein with DNA.

    Chattopadhyay, Abhijnan / Zandarashvili, Levani / Luu, Ross H / Iwahara, Junji

    Biochemistry

    2016  Volume 55, Issue 47, Page(s) 6467–6474

    Abstract: The transcription factor Egr-1 specifically binds as a monomer to its 9 bp target DNA sequence, GCGTGGGCG, via three zinc fingers and plays important roles in the brain and cardiovascular systems. Using fluorescence-based competitive binding assays, we ... ...

    Abstract The transcription factor Egr-1 specifically binds as a monomer to its 9 bp target DNA sequence, GCGTGGGCG, via three zinc fingers and plays important roles in the brain and cardiovascular systems. Using fluorescence-based competitive binding assays, we systematically analyzed the impacts of all possible single-nucleotide substitutions in the target DNA sequence and determined the change in binding free energy for each. Then, we measured the changes in binding free energy for sequences with multiple substitutions and compared them with the sum of the changes in binding free energy for each constituent single substitution. For the DNA variants with two or three nucleotide substitutions in the target sequence, we found excellent agreement between the measured and predicted changes in binding free energy. Interestingly, however, we found that this thermodynamic additivity broke down with a larger number of substitutions. For DNA sequences with four or more substitutions, the measured changes in binding free energy were significantly larger than predicted. On the basis of these results, we analyzed the occurrences of high-affinity sequences in the genome and found that the genome contains millions of such sequences that might functionally sequester Egr-1.
    MeSH term(s) Algorithms ; Base Sequence ; Binding Sites/genetics ; Binding, Competitive ; DNA/chemistry ; DNA/genetics ; DNA/metabolism ; Early Growth Response Protein 1/chemistry ; Early Growth Response Protein 1/genetics ; Early Growth Response Protein 1/metabolism ; Kinetics ; Models, Molecular ; Nucleic Acid Conformation ; Point Mutation ; Protein Binding ; Protein Domains ; Thermodynamics ; Zinc Fingers
    Chemical Substances EGR1 protein, human ; Early Growth Response Protein 1 ; DNA (9007-49-2)
    Language English
    Publishing date 2016-11-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1108-3
    ISSN 1520-4995 ; 0006-2960
    ISSN (online) 1520-4995
    ISSN 0006-2960
    DOI 10.1021/acs.biochem.6b00757
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Pannexin-1 channel opening is critical for COVID-19 pathogenesis.

    Luu, Ross / Valdebenito, Silvana / Scemes, Eliana / Cibelli, Antonio / Spray, David C / Rovegno, Maximiliano / Tichauer, Juan / Cottignies-Calamarte, Andrea / Rosenberg, Arielle / Capron, Calude / Belouzard, Sandrine / Dubuisson, Jean / Annane, Djillali / de la Grandmaison, Geoffroy Lorin / Cramer-Bordé, Elisabeth / Bomsel, Morgane / Eugenin, Eliseo

    iScience

    2021  Volume 24, Issue 12, Page(s) 103478

    Abstract: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) rapidly rampaged worldwide, causing a pandemic of coronavirus disease (COVID -19), but the biology of SARS-CoV-2 remains under investigation. We demonstrate that both SARS-CoV-2 spike protein ... ...

    Abstract Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) rapidly rampaged worldwide, causing a pandemic of coronavirus disease (COVID -19), but the biology of SARS-CoV-2 remains under investigation. We demonstrate that both SARS-CoV-2 spike protein and human coronavirus 229E (hCoV-229E) or its purified S protein, one of the main viruses responsible for the common cold
    Language English
    Publishing date 2021-11-19
    Publishing country United States
    Document type Journal Article
    ISSN 2589-0042
    ISSN (online) 2589-0042
    DOI 10.1016/j.isci.2021.103478
    Database MEDical Literature Analysis and Retrieval System OnLINE

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