A. Alexander

ORCID: 0000-0002-1825-1161
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About
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Research Areas
  • Prostate Cancer Treatment and Research
  • Cancer Cells and Metastasis
  • RNA modifications and cancer
  • Ultrasound and Hyperthermia Applications
  • Caveolin-1 and cellular processes
  • Radiation Therapy and Dosimetry
  • Pancreatic and Hepatic Oncology Research
  • Neuroinflammation and Neurodegeneration Mechanisms
  • Medical Imaging and Pathology Studies
  • Lysosomal Storage Disorders Research
  • Wnt/β-catenin signaling in development and cancer
  • Retinal Diseases and Treatments
  • Ferroptosis and cancer prognosis
  • Trypanosoma species research and implications
  • Osteoarthritis Treatment and Mechanisms
  • Optical Imaging and Spectroscopy Techniques
  • Photoacoustic and Ultrasonic Imaging
  • Cellular transport and secretion
  • Cancer-related Molecular Pathways
  • Ophthalmology and Visual Impairment Studies
  • Corneal surgery and disorders
  • Genetic and Kidney Cyst Diseases
  • Glioma Diagnosis and Treatment
  • Extracellular vesicles in disease
  • Nerve injury and regeneration

University of Maryland, Baltimore
2016-2020

University Hospital Heidelberg
2020

Heidelberg University
2020

German Cancer Research Center
2020

Government Medical College
2020

University of Baltimore
2018

Aultman Hospital
2016

US Biologic (United States)
2007

Medical University of Vienna
2007

Mayo Clinic in Florida
2007

Abstract Intrinsic malignant brain tumors, such as glioblastomas are frequently resistant to immune checkpoint blockade (ICB) with few hypermutated showing response. Modeling patient-individual resistance is challenging due the lack of predictive biomarkers and limited accessibility tissue for serial biopsies. Here, we investigate mechanisms anti-PD-1 anti-CTLA-4 therapy in syngeneic experimental gliomas show a clear dichotomy acquired heterogeneity ICB-responder non-responder tumors. We...

10.1038/s41467-020-14642-0 article EN cc-by Nature Communications 2020-02-18

Rationale: Glioblastoma is the most frequent, primary brain tumor that characterized by a highly immunosuppressive microenvironment (TME). The TME plays key role for biology and effectiveness of immunotherapies. Composition correlates with overall survival governs therapy response. Non invasive assessment has been notoriously difficult. Methods: We have designed an in vivo imaging approach to non invasively visualize innate immune cell dynamics mouse glioma model correlated MRI multiphoton...

10.7150/thno.38659 article EN cc-by Theranostics 2020-01-01

Background: Pancreatic cancer (PC) is the fourth-most-deadly in United States with a 5-year survival rate of only 8%. Unfortunately, 10–20% PC patients are candidates for surgery, vast majority locally-advanced disease undergoing chemotherapy and/or radiation therapy (RT). Current treatments clearly inadequate and novel strategies crucially required. We investigated tripartite treatment (combination tumor targeted hyperthermia (HT), (RT), immunotherapy (IT)) to alter immunosuppressive...

10.3390/cancers12041015 article EN Cancers 2020-04-21

Non-ablative or mild hyperthermia (HT) has been shown in preclinical (and clinical) studies as a localized radiosensitizer that enhances the tumoricidal effects of radiation. Most vivo HT use subcutaneous tumor models which do not adequately represent clinical conditions (e.g. proximity normal/critical organs) replicate microenvironment-both are important factors for eventual translation. The purpose this work is to demonstrate proof-of-concept locoregional radiosensitization with...

10.1259/bjr.20180759 article EN British Journal of Radiology 2019-01-23

Three-dimensional assessment of optically cleared, entire organs and organisms has recently become possible by tissue clearing selective plane illumination microscopy ("ultramicroscopy"). Resulting datasets can be highly complex, encompass over a thousand images with millions objects data several gigabytes per acquisition. This constitutes major challenge for quantitative analysis. We have developed post-processing tools to quantify microvessels their distribution in three-dimensional from...

10.1177/0271678x20961854 article EN cc-by Journal of Cerebral Blood Flow & Metabolism 2020-10-12

PURPOSE: To determine guidelines for biopsy in men with normal prostate-specific antigen (PSA) levels and suspected prostate cancer. MATERIALS AND METHODS: The clinical-sonographic features of 91 lesions reduced echogenicity 83 PSA who underwent transrectal ultrasound-guided were analyzed. RESULTS: Sixteen (19%) had cancer, two bilateral foci, four prostatic intraepithelial neoplasia (PIN). Fourteen 47 discrete hypoechoic yielded cancer or PIN versus only five 44 ill-defined vaguely (P =...

10.1148/radiology.189.2.7692464 article EN Radiology 1993-11-01

10.1016/s1063-4584(07)61471-x article EN publisher-specific-oa Osteoarthritis and Cartilage 2007-01-01
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