LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 70

Search options

  1. Article ; Online: Phenotype and fate of liver-resident CD8 T cells during acute and chronic hepacivirus infection.

    Dravid, Piyush / Murthy, Satyapramod / Attia, Zayed / Cassady, Cole / Chandra, Rahul / Trivedi, Sheetal / Vyas, Ashish / Gridley, John / Holland, Brantley / Kumari, Anuradha / Grakoui, Arash / Cullen, John M / Walker, Christopher M / Sharma, Himanshu / Kapoor, Amit

    PLoS pathogens

    2023  Volume 19, Issue 10, Page(s) e1011697

    Abstract: Immune correlates of hepatitis C virus (HCV) clearance and control remain poorly defined due to the lack of an informative animal model. We recently described acute and chronic rodent HCV-like virus (RHV) infections in lab mice. Here, we developed MHC ... ...

    Abstract Immune correlates of hepatitis C virus (HCV) clearance and control remain poorly defined due to the lack of an informative animal model. We recently described acute and chronic rodent HCV-like virus (RHV) infections in lab mice. Here, we developed MHC class I and class II tetramers to characterize the serial changes in RHV-specific CD8 and CD4 T cells during acute and chronic infection in C57BL/6J mice. RHV infection induced rapid expansion of T cells targeting viral structural and nonstructural proteins. After virus clearance, the virus-specific T cells transitioned from effectors to long-lived liver-resident memory T cells (TRM). The effector and memory CD8 and CD4 T cells primarily produced Th1 cytokines, IFN-γ, TNF-α, and IL-2, upon ex vivo antigen stimulation, and their phenotype and transcriptome differed significantly between the liver and spleen. Rapid clearance of RHV reinfection coincided with the proliferation of virus-specific CD8 TRM cells in the liver. Chronic RHV infection was associated with the exhaustion of CD8 T cells (Tex) and the development of severe liver diseases. Interestingly, the virus-specific CD8 Tex cells continued proliferation in the liver despite the persistent high-titer viremia and retained partial antiviral functions, as evident from their ability to degranulate and produce IFN-γ upon ex vivo antigen stimulation. Thus, RHV infection in mice provides a unique model to study the function and fate of liver-resident T cells during acute and chronic hepatotropic infection.
    MeSH term(s) Mice ; Animals ; Hepacivirus/genetics ; Persistent Infection ; Mice, Inbred C57BL ; CD8-Positive T-Lymphocytes ; Hepatitis C ; Hepatitis C, Chronic ; Phenotype
    Language English
    Publishing date 2023-10-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2205412-1
    ISSN 1553-7374 ; 1553-7374
    ISSN (online) 1553-7374
    ISSN 1553-7374
    DOI 10.1371/journal.ppat.1011697
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article: MORTALITY IN COQUEREL'S SIFAKAS ( PROPITHECUS COQUERELI) UNDER HUMAN CARE: A RETROSPECTIVE SURVEY FROM THE DUKE LEMUR CENTER 1990-2015.

    Cassady, Katherine / Cullen, John M / Williams, Cathy V

    Journal of zoo and wildlife medicine : official publication of the American Association of Zoo Veterinarians

    2018  Volume 49, Issue 2, Page(s) 315–323

    Abstract: Coquerel's sifakas ( Propithecus coquereli) are diurnal, folivorous lemurs native to Madagascar and one of only two members of the genus Propithecus currently housed in human care settings outside of Madagascar. This species has a lifespan of ... ...

    Abstract Coquerel's sifakas ( Propithecus coquereli) are diurnal, folivorous lemurs native to Madagascar and one of only two members of the genus Propithecus currently housed in human care settings outside of Madagascar. This species has a lifespan of approximately 30 yr but minimal information exists regarding morbidity and mortality in human care settings. In this retrospective study, medical records, postmortem exam, and autopsy reports from 56 animals housed at the Duke Lemur Center from 1990 to 2015 were evaluated. Mortality assessments included age, sex, time of year, histopathological findings, major organ system impacted, and etiological factors. Mortality was most prevalent among adults greater than 2 yr of age (42.9%) and neonates less than 7 days of age (30.4%). The top four morphological diagnoses accounted for 51.7% of all deaths and included stillbirths (19.6%), enteritis-colitis (12.5%), failure to thrive (10.7%), and systemic protozoal infections (8.9%). The two most commonly affected organ systems in animals over 7 days of age were multisystem disease (30.8%) and the gastrointestinal system (28.2%). Infections were the most common etiology with bacterial being the most prevalent followed by protozoal infections. The results provide insight into common causes of mortality of this species and can be used to guide management of this endangered primate and improve longevity in human care settings.
    MeSH term(s) Age Factors ; Animals ; Animals, Zoo ; Endangered Species ; Mortality ; North Carolina/epidemiology ; Retrospective Studies ; Strepsirhini
    Language English
    Publishing date 2018-06-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2174930-9
    ISSN 1937-2825 ; 1042-7260
    ISSN (online) 1937-2825
    ISSN 1042-7260
    DOI 10.1638/2017-0242.1
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article: Mortality in coquerel's sifakas (propithecus coquereli) under human care: a retrospective survey from the duke lemur center 1990–2015

    Cassady, Katherine / Cathy V. Williams / John M. Cullen

    Journal of zoo and wildlife medicine. 2018 June, v. 49, no. 2

    2018  

    Abstract: Coquerel's sifakas (Propithecus coquereli) are diurnal, folivorous lemurs native to Madagascar and one of only two members of the genus Propithecus currently housed in human care settings outside of Madagascar. This species has a lifespan of ... ...

    Abstract Coquerel's sifakas (Propithecus coquereli) are diurnal, folivorous lemurs native to Madagascar and one of only two members of the genus Propithecus currently housed in human care settings outside of Madagascar. This species has a lifespan of approximately 30 yr but minimal information exists regarding morbidity and mortality in human care settings. In this retrospective study, medical records, postmortem exam, and autopsy reports from 56 animals housed at the Duke Lemur Center from 1990 to 2015 were evaluated. Mortality assessments included age, sex, time of year, histopathological findings, major organ system impacted, and etiological factors. Mortality was most prevalent among adults greater than 2 yr of age (42.9%) and neonates less than 7 days of age (30.4%). The top four morphological diagnoses accounted for 51.7% of all deaths and included stillbirths (19.6%), enteritis-colitis (12.5%), failure to thrive (10.7%), and systemic protozoal infections (8.9%). The two most commonly affected organ systems in animals over 7 days of age were multisystem disease (30.8%) and the gastrointestinal system (28.2%). Infections were the most common etiology with bacterial being the most prevalent followed by protozoal infections. The results provide insight into common causes of mortality of this species and can be used to guide management of this endangered primate and improve longevity in human care settings.
    Keywords adults ; etiology ; failure to thrive ; fetal death ; gastrointestinal system ; histopathology ; humans ; Lemur ; longevity ; medical records ; morbidity ; mortality ; necropsy ; neonates ; protozoal infections ; retrospective studies ; surveys ; Madagascar
    Language English
    Dates of publication 2018-06
    Size p. 315-323.
    Publishing place American Association of Zoo Veterinarians
    Document type Article
    ZDB-ID 2174930-9
    ISSN 1937-2825 ; 1042-7260
    ISSN (online) 1937-2825
    ISSN 1042-7260
    DOI 10.1638/2017-0242.1
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  4. Article ; Online: Phenotype and fate of liver-resident CD8 T cells during acute and chronic hepacivirus infection.

    Piyush Dravid / Satyapramod Murthy / Zayed Attia / Cole Cassady / Rahul Chandra / Sheetal Trivedi / Ashish Vyas / John Gridley / Brantley Holland / Anuradha Kumari / Arash Grakoui / John M Cullen / Christopher M Walker / Himanshu Sharma / Amit Kapoor

    PLoS Pathogens, Vol 19, Iss 10, p e

    2023  Volume 1011697

    Abstract: Immune correlates of hepatitis C virus (HCV) clearance and control remain poorly defined due to the lack of an informative animal model. We recently described acute and chronic rodent HCV-like virus (RHV) infections in lab mice. Here, we developed MHC ... ...

    Abstract Immune correlates of hepatitis C virus (HCV) clearance and control remain poorly defined due to the lack of an informative animal model. We recently described acute and chronic rodent HCV-like virus (RHV) infections in lab mice. Here, we developed MHC class I and class II tetramers to characterize the serial changes in RHV-specific CD8 and CD4 T cells during acute and chronic infection in C57BL/6J mice. RHV infection induced rapid expansion of T cells targeting viral structural and nonstructural proteins. After virus clearance, the virus-specific T cells transitioned from effectors to long-lived liver-resident memory T cells (TRM). The effector and memory CD8 and CD4 T cells primarily produced Th1 cytokines, IFN-γ, TNF-α, and IL-2, upon ex vivo antigen stimulation, and their phenotype and transcriptome differed significantly between the liver and spleen. Rapid clearance of RHV reinfection coincided with the proliferation of virus-specific CD8 TRM cells in the liver. Chronic RHV infection was associated with the exhaustion of CD8 T cells (Tex) and the development of severe liver diseases. Interestingly, the virus-specific CD8 Tex cells continued proliferation in the liver despite the persistent high-titer viremia and retained partial antiviral functions, as evident from their ability to degranulate and produce IFN-γ upon ex vivo antigen stimulation. Thus, RHV infection in mice provides a unique model to study the function and fate of liver-resident T cells during acute and chronic hepatotropic infection.
    Keywords Immunologic diseases. Allergy ; RC581-607 ; Biology (General) ; QH301-705.5
    Subject code 570 ; 610
    Language English
    Publishing date 2023-10-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  5. Book: Anticancer agents based on natural product models

    Cassady, John M.

    (MEDICINAL CHEMISTRY ; 16)

    1980  

    Series title MEDICINAL CHEMISTRY ; 16
    Medicinal chemistry
    Collection Medicinal chemistry
    Keywords ANTINEOPLASTIC AGENTS ; MODELS, CHEMICAL ; Antibiotikum ; Tumor ; Cytostatikum ; Chemotherapie
    Subject Blastom ; Geschwulst ; Neoplasma ; Neoplasie ; Zytostatikum ; Cancerotoxischer Stoff ; Carcinostatikum ; Krebsmittel ; Antineoplastikum ; Anticarcinogen ; Antikarzinogen ; Anticancerogen ; Antineoplastisches Mittel ; Antibiotika
    Language English
    Size 500 S.
    Publisher Acad. Pr
    Publishing place New York
    Publishing country United States
    Document type Book
    HBZ-ID HT001102657
    ISBN 0-12-163150-8 ; 978-0-12-163150-5
    Database Catalogue ZB MED Medicine, Health

    Kategorien

  6. Article ; Online: Risk factors and treatment interventions associated with incomplete thrombus resolution and pulmonary hypertension after pulmonary embolism.

    Fang, Adam / Mayorga-Carlin, Minerva / Han, Paul / Cassady, Steven / John, Thomas / LaRocco, Allison / Etezadi, Vahid / Jones, Kevin / Nagarsheth, Khanjan / Toursavadkohi, Shahab / Jeudy, Jean / Anderson, Douglas / Griffith, Bartley / Sorkin, John D / Sarkar, Rajabrata / Lal, Brajesh K / Cires-Drouet, Rafael S

    Journal of vascular surgery. Venous and lymphatic disorders

    2023  Volume 12, Issue 1, Page(s) 101665

    Abstract: Background: Residual pulmonary vascular occlusion (RPVO) affects one half of patients after a pulmonary embolism (PE). The relationship between the risk factors and therapeutic interventions for the development of RPVO and chronic thromboembolic ... ...

    Abstract Background: Residual pulmonary vascular occlusion (RPVO) affects one half of patients after a pulmonary embolism (PE). The relationship between the risk factors and therapeutic interventions for the development of RPVO and chronic thromboembolic pulmonary hypertension is unknown.
    Methods: This retrospective review included PE patients within a 26-month period who had baseline and follow-up imaging studies (ie, computed tomography [CT], ventilation/perfusion scans, transthoracic echocardiography) available. We collected the incidence of RPVO, percentage of pulmonary artery occlusion (%PAO), baseline CT %PAO, most recent CT %PAO, and difference between the baseline and most recent %PAO on CT (Δ%PAO).
    Results: A total of 354 patients had imaging reports available; 197 with CT and 315 with transthoracic echocardiography. The median follow-up time was 144 days (interquartile range [IQR], 102-186 days). RPVO was present in 38.9% of the 354 patients. The median Δ%PAO was -10.0% (IQR, -32% to -1.2%). Fewer patients with a provoked PE developed RPVO (P ≤ .01), and the initial troponin level was lower in patients who developed RPVO (P = .03). The initial thrombus was larger in the patients who received advanced intervention vs anticoagulation (baseline CT %PAO: median, 61.2%; [IQR, 27.5%-75.0%] vs median, 12.5% [IQR, 2.5%-40.0%]; P ≤ .0001). Catheter-directed thrombolysis (CDT; median Δ%PAO, -47.5%; IQR, -63.7% to -8.7%) and surgical pulmonary embolectomy (SPE; median Δ%PAO, -42.5; IQR, -68.1% to -18.7%) had the largest thrombus reduction compared with anticoagulation (P = .01). Of the 354 patients, 76 developed pulmonary hypertension; however, only 14 received pulmonary hypertension medications and 12 underwent pulmonary thromboendarterectomy. Cancer (odds ratio [OR], 1.7) and planned prolonged anticoagulation (>1 year; OR, 2.20) increased the risk of RPVO. In contrast, the risk was lower for men (OR, 0.61), patients with recent surgery (OR, 0.33), and patients treated with SPE (OR, 0.42). A larger Δ%PAO was found in men (coefficient, -8.94), patients with a lower body mass index (coefficient, -0.66), patients treated with CDT (coefficient, -18.12), and patients treated with SPE (coefficient, -21.69). A lower Δ%PAO was found in African-American patients (coefficient, 7.31).
    Conclusions: The use of CDT and SPE showed long-term benefit in thrombus reduction.
    MeSH term(s) Male ; Humans ; Hypertension, Pulmonary/diagnostic imaging ; Hypertension, Pulmonary/therapy ; Hypertension, Pulmonary/complications ; Pulmonary Embolism/diagnostic imaging ; Pulmonary Embolism/therapy ; Pulmonary Embolism/complications ; Risk Factors ; Thrombosis/drug therapy ; Arterial Occlusive Diseases ; Retrospective Studies ; Anticoagulants/therapeutic use ; Thrombolytic Therapy/adverse effects ; Thrombolytic Therapy/methods ; Treatment Outcome
    Chemical Substances Anticoagulants
    Language English
    Publishing date 2023-08-16
    Publishing country United States
    Document type Journal Article
    ISSN 2213-3348
    ISSN (online) 2213-3348
    DOI 10.1016/j.jvsv.2023.08.006
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Correction to: Comparative safety and efficacy of balloon use in air enema reduction for pediatric intussusception.

    Golriz, Farahnaz / Cassady, Christopher I / Bales, Brandy / Herrejon, Christi / Hicks, M John / Zhang, Wei / Orth, Robert C / Guillerman, R Paul

    Pediatric radiology

    2018  Volume 48, Issue 13, Page(s) 1975

    Abstract: The original version on this paper contained an error. The names of M. John Hicks and R. Paul ...

    Abstract The original version on this paper contained an error. The names of M. John Hicks and R. Paul Guillerman, though correctly appeared in the published version, are incorrectly displayed in indexing sites.
    Language English
    Publishing date 2018-10-24
    Publishing country Germany
    Document type Journal Article ; Published Erratum
    ZDB-ID 124459-0
    ISSN 1432-1998 ; 0301-0449
    ISSN (online) 1432-1998
    ISSN 0301-0449
    DOI 10.1007/s00247-018-4278-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Prevalence of Diastolic Dysfunction in Adult Survivors of Childhood Cancer: A Report From SJLIFE Cohort.

    Palmer, Cassady / Mazur, Wojciech / Truong, Vien T / Nagueh, Sherif F / Fowler, James A / Shelton, Kyla / Joshi, Vijaya M / Ness, Kirsten K / Srivastava, Deo Kumar / Robison, Leslie L / Hudson, Melissa M / Rhea, Isaac B / Jefferies, John L / Armstrong, Gregory T

    JACC. CardioOncology

    2023  Volume 5, Issue 3, Page(s) 377–388

    Abstract: Background: The prevalence of diastolic dysfunction has not been systematically evaluated in a large population of survivors of childhood cancer using established guidelines and standards.: Objectives: This study sought to assess the prevalence and ... ...

    Abstract Background: The prevalence of diastolic dysfunction has not been systematically evaluated in a large population of survivors of childhood cancer using established guidelines and standards.
    Objectives: This study sought to assess the prevalence and progression of diastolic dysfunction in adult survivors of childhood cancer exposed to cardiotoxic therapy.
    Methods: Comprehensive, longitudinal echocardiographic examinations of adult survivors of childhood cancer ≥18 years of age and ≥10 years from diagnosis in SJLIFE (St. Jude Lifetime Cohort Study) were performed. Diastolic dysfunction was defined based on 2016 American Society of Echocardiography/European Association of Cardiovascular Imaging guidelines.
    Results: Among 3,342 survivors, the median (25th-75th percentiles [quartile (Q)1-Q3]) age at diagnosis was 8.1 years (Q1-Q3: 3.6-13.7 years), 30.1 years (Q1-Q3: 24.4-37.0 years) at the baseline echocardiography evaluation (Echo 1), and 36.6 years (Q1-Q3: 30.8-43.6 years) at the last follow-up echocardiography evaluation (1,435 survivors) (Echo 2). The proportion of diastolic dysfunction was 15.2% (95% CI: 14.0%-16.4%) at Echo 1 and 15.7% (95% CI: 13.9%-17.7%) at Echo 2, largely attributable to concurrent systolic dysfunction. Less than 5% of survivors with preserved ejection fraction had diastolic dysfunction (2.2% at Echo 1, 3.7% at Echo 2). Using global longitudinal strain assessment in adult survivors with preserved ejection fraction (defined with a cutpoint worse than -15.9%), the proportion of diastolic dysfunction increased to 9.2% at baseline and 9.0% at follow-up.
    Conclusions: The prevalence of isolated diastolic dysfunction is low among adults who received cardiotoxic therapies for childhood cancer. The inclusion of left ventricular global longitudinal strain significantly increased the identification of diastolic dysfunction.
    Language English
    Publishing date 2023-03-21
    Publishing country United States
    Document type Journal Article
    ISSN 2666-0873
    ISSN (online) 2666-0873
    DOI 10.1016/j.jaccao.2022.12.010
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: The use of chromium(III) complexes to enhance peptide protonation by electrospray ionization mass spectrometry.

    Jing, Xinyao / Edwards, Kyle C / Vincent, John B / Cassady, Carolyn J

    Journal of mass spectrometry : JMS

    2018  Volume 53, Issue 12, Page(s) 1198–1206

    Abstract: ... the intensity of doubly protonated peptides, [M + 2H] ...

    Abstract The addition of trivalent chromium, Cr(III), reagents to peptide solutions can increase the intensity of doubly protonated peptides, [M + 2H]
    MeSH term(s) Amino Acid Sequence ; Amino Acids/chemistry ; Chromium/chemistry ; Coordination Complexes/chemistry ; Ligands ; Peptides/chemistry ; Protein Binding ; Spectrometry, Mass, Electrospray Ionization/methods ; Water/chemistry
    Chemical Substances Amino Acids ; Coordination Complexes ; Ligands ; Peptides ; Water (059QF0KO0R) ; Chromium (0R0008Q3JB)
    Language English
    Publishing date 2018-10-03
    Publishing country England
    Document type Journal Article
    ZDB-ID 1221763-3
    ISSN 1096-9888 ; 1076-5174
    ISSN (online) 1096-9888
    ISSN 1076-5174
    DOI 10.1002/jms.4297
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Comparative safety and efficacy of balloon use in air enema reduction for pediatric intussusception.

    Golriz, Farahnaz / Cassady, Christopher I / Bales, Brandy / Herrejon, Christi / Hicks, M John / Zhang, Wei / Orth, Robert C / Guillerman, R Paul

    Pediatric radiology

    2018  Volume 48, Issue 10, Page(s) 1423–1431

    Abstract: Background: Intussusception, a common cause of bowel obstruction in young children, is primarily treated with air enema reduction. There is little literature comparing the safety and efficacy of air reduction without or with a rectal balloon.: ... ...

    Abstract Background: Intussusception, a common cause of bowel obstruction in young children, is primarily treated with air enema reduction. There is little literature comparing the safety and efficacy of air reduction without or with a rectal balloon.
    Objective: To determine the safety and efficacy of a rectal balloon seal in air enema reduction.
    Materials and methods: We retrospectively reviewed the records of children who underwent air reduction for ileocolic or ileo-ileocolic intussusception over an 8-year period. We sorted data from 566 children according to whether a rectal balloon was used in the reduction, and further sorted them by type and experience level of the practitioner. Using logistic regression analyses, we identified risk factors for iatrogenic bowel perforation or failed reduction.
    Results: Significant associations with bowel perforation included balloon use (P=0.038), age <1 year (P<0.0001), and attending physician's level of experience <5 years (P=0.043). Younger age was associated with both perforation (P<0.0001) and procedural failure (P=0.001). The risk-adjusted predicted probability of perforation decreased with age, approaching zero by 10 months regardless of balloon use. For cases without bowel resection, the risk-adjusted predicted probability of failure decreased toward zero by 30 months with balloon use, while remaining constant at 3-12% regardless of age when not using a balloon.
    Conclusion: The likelihood of a successful air reduction might be safely increased by using an inflated rectal balloon in children older than 9 months. Use of a balloon in younger infants is associated with a higher risk of iatrogenic bowel injury.
    MeSH term(s) Adolescent ; Air ; Child ; Child, Preschool ; Enema/adverse effects ; Enema/methods ; Female ; Humans ; Iatrogenic Disease ; Infant ; Intestinal Perforation/etiology ; Intussusception/therapy ; Male ; Patient Safety ; Radiography, Interventional ; Retrospective Studies ; Risk Factors ; Treatment Failure ; Treatment Outcome
    Language English
    Publishing date 2018-05-24
    Publishing country Germany
    Document type Comparative Study ; Journal Article
    ZDB-ID 124459-0
    ISSN 1432-1998 ; 0301-0449
    ISSN (online) 1432-1998
    ISSN 0301-0449
    DOI 10.1007/s00247-018-4156-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top