LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 83

Search options

  1. Article: BCL-2 in the crosshairs: tipping the balance of life and death.

    Walensky, L D

    Cell death and differentiation

    2006  Volume 13, Issue 8, Page(s) 1339–1350

    Abstract: The discovery of B-cell lymphoma-2 (BCL-2) over 20 years ago revealed a new paradigm in cancer biology: the development and persistence of cancer can be driven by molecular roadblocks along the natural pathway to cell death. The subsequent identification ...

    Abstract The discovery of B-cell lymphoma-2 (BCL-2) over 20 years ago revealed a new paradigm in cancer biology: the development and persistence of cancer can be driven by molecular roadblocks along the natural pathway to cell death. The subsequent identification of an expansive family of BCL-2 proteins provoked an intensive investigation of the interplay among these critical regulators of cell death. What emerged was a compelling tale of guardians and executioners, each participating in a molecular choreography that dictates cell fate. Ten years into the BCL-2 era, structural details defined how certain BCL-2 family proteins interact, and molecular targeting of the BCL-2 family has since become a pharmacological quest. Although many facets of BCL-2 family death signaling remain a mechanistic mystery, small molecules and peptides that effectively target BCL-2 are eliminating the roadblock to cell death, raising hopes for a medical breakthrough in cancer and other diseases of deregulated apoptosis.
    MeSH term(s) Animals ; Apoptosis ; Homeostasis ; Humans ; Protein Conformation ; Proto-Oncogene Proteins c-bcl-2/chemistry ; Proto-Oncogene Proteins c-bcl-2/classification ; Proto-Oncogene Proteins c-bcl-2/genetics ; Proto-Oncogene Proteins c-bcl-2/metabolism ; Signal Transduction
    Chemical Substances Proto-Oncogene Proteins c-bcl-2
    Language English
    Publishing date 2006-08
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1225672-9
    ISSN 1350-9047
    ISSN 1350-9047
    DOI 10.1038/sj.cdd.4401992
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Inhibition of FOXP3 by stapled alpha-helical peptides dampens regulatory T cell function.

    Hawley, Katrina M / Eclov, Rachel J / Schnorenberg, Mathew R / Tian, Yu / Shah, Rhea N / Thomas-Toth, Anika T / Fefferman, Marie / Bird, Gregory H / Walensky, Loren D / Tirrell, Matthew V / LaBelle, James L

    Proceedings of the National Academy of Sciences of the United States of America

    2022  Volume 119, Issue 42, Page(s) e2209044119

    Abstract: Despite continuing advances in the development of novel cellular-, antibody-, and chemotherapeutic-based strategies to enhance immune reactivity, the presence of regulatory T cells (Treg cells) remains a complicating factor for their clinical efficacy. ... ...

    Abstract Despite continuing advances in the development of novel cellular-, antibody-, and chemotherapeutic-based strategies to enhance immune reactivity, the presence of regulatory T cells (Treg cells) remains a complicating factor for their clinical efficacy. To overcome dosing limitations and off-target effects from antibody-based Treg cell deletional strategies or small molecule drugging, we investigated the ability of hydrocarbon stapled alpha-helical (SAH) peptides to target FOXP3, the master transcription factor regulator of Treg cell development, maintenance, and suppressive function. Using the crystal structure of the FOXP3 homodimer as a guide, we developed SAHs in the likeness of a portion of the native FOXP3 antiparallel coiled-coil homodimerization domain (SAH-FOXP3) to block this key FOXP3 protein-protein interaction (PPI) through molecular mimicry. We describe the design, synthesis, and biochemical evaluation of single- and double-stapled SAHs covering the entire coiled-coil expanse. We show that lead SAH-FOXP3s bind FOXP3, are cell permeable and nontoxic to T cells, induce dose-dependent transcript and protein level alterations of FOXP3 target genes, impede Treg cell function, and lead to Treg cell gene expression changes in vivo consistent with FOXP3 dysfunction. These results demonstrate a proof of concept for rationally designed FOXP3-directed peptide therapeutics that could be used as approaches to amplify endogenous immune responsiveness.
    MeSH term(s) Forkhead Transcription Factors/metabolism ; Gene Expression Regulation ; Peptides/metabolism ; Protein Conformation, alpha-Helical ; T-Lymphocytes, Regulatory
    Chemical Substances Forkhead Transcription Factors ; Peptides
    Language English
    Publishing date 2022-10-13
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2209044119
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Mechanistic validation of a clinical lead stapled peptide that reactivates p53 by dual HDM2 and HDMX targeting.

    Wachter, F / Morgan, A M / Godes, M / Mourtada, R / Bird, G H / Walensky, L D

    Oncogene

    2017  Volume 36, Issue 15, Page(s) 2184–2190

    Abstract: Hydrocarbon-stapled peptides that display key residues of the p53 transactivation domain have emerged as bona fide clinical candidates for reactivating the tumor suppression function of p53 in cancer by dual targeting of the negative regulators HDM2 and ... ...

    Abstract Hydrocarbon-stapled peptides that display key residues of the p53 transactivation domain have emerged as bona fide clinical candidates for reactivating the tumor suppression function of p53 in cancer by dual targeting of the negative regulators HDM2 and HDMX. A recent study questioned the mechanistic specificity of such stapled peptides based on interrogating their capacity to disrupt p53/HDM2 and p53/HDMX complexes in living cells using a new recombinase enhanced bimolecular luciferase complementation platform (ReBiL). Here, we directly evaluate the cellular uptake, intracellular targeting selectivity and p53-dependent cytotoxicity of the clinical prototype ATSP-7041. We find that under standard serum-containing tissue culture conditions, ATSP-7041 achieves intracellular access without membrane disruption, dose-dependently dissociates both p53/HDM2 and p53/HDMX complexes but not an unrelated protein complex in long-term ReBiL experiments, and is selectively cytotoxic to cancer cells bearing wild-type p53 by inducing a surge in p53 protein level. These studies underscore the importance of a thorough stepwise approach, including consideration of the time-dependence of cellular uptake and intracellular distribution, in evaluating and advancing stapled peptides for clinical translation.
    MeSH term(s) Antineoplastic Agents/pharmacokinetics ; Antineoplastic Agents/pharmacology ; Bone Neoplasms/drug therapy ; Bone Neoplasms/metabolism ; Cell Line, Tumor ; Humans ; Nuclear Proteins/metabolism ; Osteosarcoma/drug therapy ; Osteosarcoma/metabolism ; Peptides, Cyclic/pharmacokinetics ; Peptides, Cyclic/pharmacology ; Protein Binding/drug effects ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-mdm2/metabolism ; Tumor Suppressor Protein p53/metabolism
    Chemical Substances ATSP-7041 ; Antineoplastic Agents ; MDM4 protein, human ; Nuclear Proteins ; Peptides, Cyclic ; Proto-Oncogene Proteins ; TP53 protein, human ; Tumor Suppressor Protein p53 ; MDM2 protein, human (EC 2.3.2.27) ; Proto-Oncogene Proteins c-mdm2 (EC 2.3.2.27)
    Language English
    Publishing date 2017-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 639046-8
    ISSN 1476-5594 ; 0950-9232
    ISSN (online) 1476-5594
    ISSN 0950-9232
    DOI 10.1038/onc.2016.361
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Glucose metabolism and pyruvate carboxylase enhance glutathione synthesis and restrict oxidative stress in pancreatic islets.

    Fu, Accalia / van Rooyen, Lara / Evans, Lindsay / Armstrong, Nina / Avizonis, Daina / Kin, Tatsuya / Bird, Gregory H / Reddy, Anita / Chouchani, Edward T / Liesa-Roig, Marc / Walensky, Loren D / Shapiro, A M James / Danial, Nika N

    Cell reports

    2021  Volume 37, Issue 8, Page(s) 110037

    Abstract: Glucose metabolism modulates the islet β cell responses to diabetogenic stress, including inflammation. Here, we probed the metabolic mechanisms that underlie the protective effect of glucose in inflammation by interrogating the metabolite profiles of ... ...

    Abstract Glucose metabolism modulates the islet β cell responses to diabetogenic stress, including inflammation. Here, we probed the metabolic mechanisms that underlie the protective effect of glucose in inflammation by interrogating the metabolite profiles of primary islets from human donors and identified de novo glutathione synthesis as a prominent glucose-driven pro-survival pathway. We find that pyruvate carboxylase is required for glutathione synthesis in islets and promotes their antioxidant capacity to counter inflammation and nitrosative stress. Loss- and gain-of-function studies indicate that pyruvate carboxylase is necessary and sufficient to mediate the metabolic input from glucose into glutathione synthesis and the oxidative stress response. Altered redox metabolism and cellular capacity to replenish glutathione pools are relevant in multiple pathologies beyond obesity and diabetes. Our findings reveal a direct interplay between glucose metabolism and glutathione biosynthesis via pyruvate carboxylase. This metabolic axis may also have implications in other settings where sustaining glutathione is essential.
    MeSH term(s) Adult ; Animals ; Antioxidants/physiology ; Female ; Glucose/metabolism ; Glutathione/biosynthesis ; Glutathione/metabolism ; Humans ; Insulin/metabolism ; Islets of Langerhans/metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Middle Aged ; Oxidation-Reduction ; Oxidative Stress/physiology ; Primary Cell Culture ; Pyruvate Carboxylase/metabolism
    Chemical Substances Antioxidants ; Insulin ; Pyruvate Carboxylase (EC 6.4.1.1) ; Glutathione (GAN16C9B8O) ; Glucose (IY9XDZ35W2)
    Language English
    Publishing date 2021-11-24
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2649101-1
    ISSN 2211-1247 ; 2211-1247
    ISSN (online) 2211-1247
    ISSN 2211-1247
    DOI 10.1016/j.celrep.2021.110037
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Regulation of mitochondrial ceramide distribution by members of the BCL-2 family.

    Zhang, Tejia / Barclay, Lauren / Walensky, Loren D / Saghatelian, Alan

    Journal of lipid research

    2015  Volume 56, Issue 8, Page(s) 1501–1510

    Abstract: Apoptosis is an intricately regulated cellular process that proceeds through different cell type- and signal-dependent pathways. In the mitochondrial apoptotic program, mitochondrial outer membrane permeabilization by BCL-2 proteins leads to the release ... ...

    Abstract Apoptosis is an intricately regulated cellular process that proceeds through different cell type- and signal-dependent pathways. In the mitochondrial apoptotic program, mitochondrial outer membrane permeabilization by BCL-2 proteins leads to the release of apoptogenic factors, caspase activation, and cell death. In addition to protein components of the mitochondrial apoptotic machinery, an interesting role for lipids and lipid metabolism in BCL-2 family-regulated apoptosis is also emerging. We used a comparative lipidomics approach to uncover alterations in lipid profile in the absence of the proapoptotic proteins BAX and BAK in mouse embryonic fibroblasts (MEFs). We detected over 1,000 ions in these experiments and found changes in an ion with an m/z of 534.49. Structural elucidation of this ion through tandem mass spectrometry revealed that this molecule is a ceramide with a 16-carbon N-acyl chain and sphingadiene backbone (d18:2/16:0 ceramide). Targeted LC/MS analysis revealed elevated levels of additional sphingadiene-containing ceramides (d18:2-Cers) in BAX, BAK-double knockout MEFs. Elevated d18:2-Cers are also found in immortalized baby mouse kidney epithelial cells lacking BAX and BAK. These results support the existence of a distinct biochemical pathway for regulating ceramides with different backbone structures and suggest that sphingadiene-containing ceramides may have functions that are distinct from the more common sphingosine-containing species.
    MeSH term(s) Animals ; Cell Line ; Ceramides/chemistry ; Ceramides/metabolism ; Fibroblasts/cytology ; Fibroblasts/metabolism ; Gene Knockout Techniques ; Mice ; Mitochondria/metabolism ; Up-Regulation ; bcl-2 Homologous Antagonist-Killer Protein/deficiency ; bcl-2 Homologous Antagonist-Killer Protein/genetics ; bcl-2 Homologous Antagonist-Killer Protein/metabolism ; bcl-2-Associated X Protein/deficiency ; bcl-2-Associated X Protein/genetics ; bcl-2-Associated X Protein/metabolism
    Chemical Substances Ceramides ; bcl-2 Homologous Antagonist-Killer Protein ; bcl-2-Associated X Protein
    Language English
    Publishing date 2015-06-09
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 80154-9
    ISSN 1539-7262 ; 0022-2275
    ISSN (online) 1539-7262
    ISSN 0022-2275
    DOI 10.1194/jlr.M058750
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: The challenge of drugging undruggable targets in cancer: lessons learned from targeting BCL-2 family members.

    Verdine, Gregory L / Walensky, Loren D

    Clinical cancer research : an official journal of the American Association for Cancer Research

    2007  Volume 13, Issue 24, Page(s) 7264–7270

    Abstract: The genomic and proteomic revolutions have provided us with an ever-increasing number of mechanistic insights into cancer pathogenesis. Mutated genes and pathologic protein products have emerged as the basis for modern anticancer drug development. With ... ...

    Abstract The genomic and proteomic revolutions have provided us with an ever-increasing number of mechanistic insights into cancer pathogenesis. Mutated genes and pathologic protein products have emerged as the basis for modern anticancer drug development. With the increasing realization of the importance of disrupting oncogenic protein-protein interaction, new challenges have emerged for classical small molecule and protein-based drug modalities, i.e., the critical need to target flat and extended protein surfaces. Here, we highlight two distinct technologies that are being used to bridge the pharmacologic gap between small molecules and protein therapeutics. With the BCL-2 family of survival proteins as their substrate for intracellular targeting, we conclude that peptide stapling and fragment-based drug discovery show promise to traverse the critical surface features of proteins that drive human cancer.
    MeSH term(s) Animals ; Antineoplastic Agents/chemistry ; Antineoplastic Agents/metabolism ; Drug Delivery Systems/methods ; Drug Design ; Humans ; Neoplasms/drug therapy ; Protein Binding ; Protein Structure, Tertiary ; Proto-Oncogene Proteins c-bcl-2/chemistry ; Proto-Oncogene Proteins c-bcl-2/metabolism
    Chemical Substances Antineoplastic Agents ; Proto-Oncogene Proteins c-bcl-2
    Language English
    Publishing date 2007-12-15
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1225457-5
    ISSN 1557-3265 ; 1078-0432
    ISSN (online) 1557-3265
    ISSN 1078-0432
    DOI 10.1158/1078-0432.CCR-07-2184
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Bim

    Cerqueira, Débora M / Bodnar, Andrew J / Phua, Yu Leng / Freer, Rachel / Hemker, Shelby L / Walensky, Loren D / Hukriede, Neil A / Ho, Jacqueline

    FASEB journal : official publication of the Federation of American Societies for Experimental Biology

    2017  Volume 31, Issue 8, Page(s) 3540–3554

    Abstract: Low nephron endowment at birth has been associated with an increased risk for developing hypertension and chronic kidney disease. We demonstrated in an earlier study that conditional deletion of the microRNA (miRNA)-processing enzyme Dicer from nephron ... ...

    Abstract Low nephron endowment at birth has been associated with an increased risk for developing hypertension and chronic kidney disease. We demonstrated in an earlier study that conditional deletion of the microRNA (miRNA)-processing enzyme Dicer from nephron progenitors results in premature depletion of the progenitors and increased expression of the proapoptotic protein Bim (also known as Bcl-2L11). In this study, we generated a compound mouse model with conditional deletion of both
    MeSH term(s) Animals ; Apoptosis/physiology ; Bcl-2-Like Protein 11/genetics ; Bcl-2-Like Protein 11/metabolism ; DEAD-box RNA Helicases/genetics ; DEAD-box RNA Helicases/metabolism ; Embryo, Nonmammalian ; Gene Deletion ; Gene Dosage/physiology ; Gene Expression Regulation, Developmental/physiology ; HEK293 Cells ; Humans ; Kidney/embryology ; Mice ; Mice, Transgenic ; MicroRNAs/genetics ; MicroRNAs/metabolism ; Nephrons/cytology ; Ribonuclease III/genetics ; Ribonuclease III/metabolism ; Stem Cells/cytology ; Xenopus laevis/embryology
    Chemical Substances Bcl-2-Like Protein 11 ; Bcl2l11 protein, mouse ; MicroRNAs ; Dicer1 protein, mouse (EC 3.1.26.3) ; Ribonuclease III (EC 3.1.26.3) ; DEAD-box RNA Helicases (EC 3.6.4.13)
    Language English
    Publishing date 2017
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 639186-2
    ISSN 1530-6860 ; 0892-6638
    ISSN (online) 1530-6860
    ISSN 0892-6638
    DOI 10.1096/fj.201700010R
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Cost-effectiveness and budget impact of immediate antiretroviral therapy initiation for treatment of HIV infection in Côte d'Ivoire: A model-based analysis.

    Ouattara, Eric N / MacLean, Rachel L / Danel, Christine / Borre, Ethan D / Gabillard, Delphine / Huang, Mingshu / Moh, Raoul / Paltiel, A David / Eholié, Serge P / Walensky, Rochelle P / Anglaret, Xavier / Freedberg, Kenneth A

    PloS one

    2019  Volume 14, Issue 6, Page(s) e0219068

    Abstract: Introduction: The Temprano and START trials provided evidence to support early ART initiation recommendations. We projected long-term clinical and economic outcomes of immediate ART initiation in Côte d'Ivoire.: Methods: We used a mathematical model ... ...

    Abstract Introduction: The Temprano and START trials provided evidence to support early ART initiation recommendations. We projected long-term clinical and economic outcomes of immediate ART initiation in Côte d'Ivoire.
    Methods: We used a mathematical model to compare three potential ART initiation criteria: 1) CD4 <350/μL (ART<350/μL); 2) CD4 <500/μL (ART<500/μL); and 3) ART at presentation (Immediate ART). Outcomes from the model included life expectancy, 10-year medical resource use, incremental cost-effectiveness ratios (ICERs) in $/year of life saved (YLS), and 5-year budget impact. We simulated people with HIV (PWH) in care (mean CD4: 259/μL, SD 198/μL) and transmitted cases. Key input parameters to the analysis included first-line ART efficacy (80% suppression at 6 months) and ART cost ($90/person-year). We assessed cost-effectiveness relative to Côte d'Ivoire's 2017 per capita annual gross domestic product ($1,600).
    Results: Immediate ART increased life expectancy by 0.34 years compared to ART<350/μL and 0.17 years compared to ART<500/μL. Immediate ART resulted in 4,500 fewer 10-year transmissions per 170,000 PWH compared to ART<350/μL. In cost-effectiveness analysis, Immediate ART had a 10-year ICER of $680/YLS compared to ART<350/μL, ranging from cost-saving to an ICER of $1,440/YLS as transmission rates varied. ART<500/μL was "dominated" (an inefficient use of resources), compared with Immediate ART. Immediate ART increased the 5-year HIV care budget from $801.9M to $812.6M compared to ART<350/μL.
    Conclusions: In Côte d'Ivoire, immediate compared to later ART initiation will increase life expectancy, decrease HIV transmission, and be cost-effective over the long-term, with modest budget impact. Immediate ART initiation is an appropriate, high-value standard of care in Côte d'Ivoire and similar settings.
    MeSH term(s) Adolescent ; Adult ; Anti-HIV Agents/administration & dosage ; Anti-HIV Agents/economics ; Budgets ; CD4 Lymphocyte Count ; Cohort Studies ; Computer Simulation ; Cost-Benefit Analysis ; Cote d'Ivoire ; Drug Costs ; Female ; HIV Infections/drug therapy ; HIV Infections/economics ; HIV Infections/immunology ; Health Resources/economics ; Humans ; Life Expectancy ; Male ; Middle Aged ; Models, Biological ; Models, Economic ; Treatment Outcome ; Young Adult
    Chemical Substances Anti-HIV Agents
    Language English
    Publishing date 2019-06-27
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0219068
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Distinct BimBH3 (BimSAHB) stapled peptides for structural and cellular studies.

    Bird, Greg H / Gavathiotis, Evripidis / LaBelle, James L / Katz, Samuel G / Walensky, Loren D

    ACS chemical biology

    2014  Volume 9, Issue 3, Page(s) 831–837

    Abstract: Hydrocarbon stapling is a chemical approach to restoring and fortifying the natural α-helical structure of peptides that otherwise unfold when taken out of context from the host protein. By iterating the peptide sequence, staple type, and sites of ... ...

    Abstract Hydrocarbon stapling is a chemical approach to restoring and fortifying the natural α-helical structure of peptides that otherwise unfold when taken out of context from the host protein. By iterating the peptide sequence, staple type, and sites of insertion, discrete compositions can be generated to suit a diversity of biochemical, structural, proteomic, cellular, and drug development applications. Here, we reinforce key design considerations to avoid pitfalls and maximize progress when applying stapled peptides in chemistry and biology research.
    MeSH term(s) Animals ; Apoptosis ; Humans ; Peptide Fragments/chemistry ; Peptide Fragments/metabolism ; Proto-Oncogene Proteins/chemistry ; Proto-Oncogene Proteins/metabolism
    Chemical Substances Peptide Fragments ; Proto-Oncogene Proteins
    Language English
    Publishing date 2014-01-03
    Publishing country United States
    Document type Letter ; Research Support, N.I.H., Extramural ; Comment
    ISSN 1554-8937
    ISSN (online) 1554-8937
    DOI 10.1021/cb4003305
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Cost-effectiveness of a Novel Lipoarabinomannan Test for Tuberculosis in Patients With Human Immunodeficiency Virus.

    Reddy, Krishna P / Denkinger, Claudia M / Broger, Tobias / McCann, Nicole C / Gupta-Wright, Ankur / Kerkhoff, Andrew D / Pei, Pamela P / Shebl, Fatma M / Fielding, Katherine L / Nicol, Mark P / Horsburgh, C Robert / Meintjes, Graeme / Freedberg, Kenneth A / Wood, Robin / Walensky, Rochelle P

    Clinical infectious diseases : an official publication of the Infectious Diseases Society of America

    2020  Volume 73, Issue 7, Page(s) e2077–e2085

    Abstract: Background: A novel urine lipoarabinomannan assay (FujiLAM) has higher sensitivity and higher cost than the first-generation AlereLAM assay. We evaluated the cost-effectiveness of FujiLAM for tuberculosis testing among hospitalized people with human ... ...

    Abstract Background: A novel urine lipoarabinomannan assay (FujiLAM) has higher sensitivity and higher cost than the first-generation AlereLAM assay. We evaluated the cost-effectiveness of FujiLAM for tuberculosis testing among hospitalized people with human immunodeficiency virus (HIV), irrespective of symptoms.
    Methods: We used a microsimulation model to project clinical and economic outcomes of 3 testing strategies: (1) sputum Xpert MTB/RIF (Xpert), (2) sputum Xpert plus urine AlereLAM (Xpert+AlereLAM), (3) sputum Xpert plus urine FujiLAM (Xpert+FujiLAM). The modeled cohort matched that of a 2-country clinical trial. We applied diagnostic yields from a retrospective study (yields for Xpert/Xpert+AlereLAM/Xpert+FujiLAM among those with CD4 <200 cells/µL: 33%/62%/70%; among those with CD4 ≥200 cells/µL: 33%/35%/47%). Costs of Xpert/AlereLAM/FujiLAM were US$15/3/6 (South Africa) and $25/3/6 (Malawi). Xpert+FujiLAM was considered cost-effective if its incremental cost-effectiveness ratio (US$/year-of-life saved) was <$940 (South Africa) and <$750 (Malawi). We varied key parameters in sensitivity analysis and performed a budget impact analysis of implementing FujiLAM countrywide.
    Results: Compared with Xpert+AlereLAM, Xpert+FujiLAM increased life expectancy by 0.2 years for those tested in South Africa and Malawi. Xpert+FujiLAM was cost-effective in both countries. Xpert+FujiLAM for all patients remained cost-effective compared with sequential testing and CD4-stratified testing strategies. FujiLAM use added 3.5% (South Africa) and 4.7% (Malawi) to 5-year healthcare costs of tested patients, primarily reflecting ongoing HIV treatment costs among survivors.
    Conclusions: FujiLAM with Xpert for tuberculosis testing in hospitalized people with HIV is likely to increase life expectancy and be cost-effective at the currently anticipated price in South Africa and Malawi. Additional studies should evaluate FujiLAM in clinical practice settings.
    MeSH term(s) Cost-Benefit Analysis ; HIV ; HIV Infections/complications ; Humans ; Lipopolysaccharides ; Retrospective Studies ; Sensitivity and Specificity ; Sputum ; Tuberculosis/diagnosis
    Chemical Substances Lipopolysaccharides ; lipoarabinomannan
    Language English
    Publishing date 2020-11-16
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 1099781-7
    ISSN 1537-6591 ; 1058-4838
    ISSN (online) 1537-6591
    ISSN 1058-4838
    DOI 10.1093/cid/ciaa1698
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top