Ahmad Najafi

ORCID: 0000-0001-9821-336X
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About
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Research Areas
  • Radiopharmaceutical Chemistry and Applications
  • Monoclonal and Polyclonal Antibodies Research
  • Advanced MRI Techniques and Applications
  • Medical Imaging Techniques and Applications
  • Immune Cell Function and Interaction
  • Advanced Neuroimaging Techniques and Applications
  • Medical Imaging and Pathology Studies
  • MRI in cancer diagnosis
  • Neuroscience and Neuropharmacology Research
  • Cytomegalovirus and herpesvirus research
  • Diet and metabolism studies
  • Functional Brain Connectivity Studies
  • COVID-19 Clinical Research Studies
  • Lanthanide and Transition Metal Complexes
  • Schizophrenia research and treatment
  • Parvovirus B19 Infection Studies
  • SARS-CoV-2 and COVID-19 Research
  • Cancer, Hypoxia, and Metabolism
  • Cardiovascular Function and Risk Factors
  • Bee Products Chemical Analysis
  • Biotin and Related Studies
  • Nanoparticle-Based Drug Delivery
  • CAR-T cell therapy research
  • Glycosylation and Glycoproteins Research
  • Glioma Diagnosis and Treatment

Shahid Sadoughi University of Medical Sciences and Health Services
2014-2025

Mazandaran University of Medical Sciences
2016-2024

Kashan University of Medical Sciences
2021-2023

Yellowstone Ecological Research Center
2016

Yellowstone National Park
2016

Shaare Zedek Medical Center
2006

Imaging Center
1993-2001

University of California, Irvine
1993-2001

University of California San Diego Medical Center
1999

Mount Sinai Hospital
1999

Sleep deprivation has been shown to have an antidepressant benefit in a subgroup of depressed patients. Functional imaging studies by the authors and others suggested that patients with elevated metabolic rates anterior cingulate gyrus at baseline are more likely respond either sleep or medications than normal rates. The extend their earlier work larger group explore additional brain areas statistical probability mapping.Thirty-six unipolar depression 26 volunteers were studied positron...

10.1176/ajp.156.8.1149 article EN American Journal of Psychiatry 1999-08-01

This study reports the first paired measurements of glucose metabolism and size thalamic regions in never-medicated schizophrenic patients using coregistered magnetic resonance imaging (MRI) templates.Positron emission tomography with [18F]fluorodeoxyglucose matching MRI scans were obtained 20 schizophrenia 15 normal volunteers. Methods for edge finding, statistical testing shape differences chi-square maps, localization major subregions developed.Patients showed a diminished metabolic rate...

10.1176/ajp.153.2.191 article EN American Journal of Psychiatry 1996-02-01

POSITRON emission tomography using 6-FDOPA as a marker of presynaptic dopaminergic activity was used to investigate the role dopamine system in stuttering. Three patients with moderate severe developmental stuttering were compared six normal controls. Stuttering subjects showed significantly higher uptake than controls medial pre-frontal cortex, deep orbital insular extended amygdala, auditory cortex and caudate tail. Elevated ventral limbic cortical subcortical regions is compatible...

10.1097/00001756-199702100-00037 article EN Neuroreport 1997-02-01

The cortical-striatal-thalamic circuit modulates cognitive processing and thus may be involved in the dysfunction schizophrenia. imaging of metabolic rate structures making up this could reveal correlates schizophrenia its main symptoms.Seventy male schizophrenic patients underwent [18F]-fluorodeoxyglucose positron emission tomography after a period at least 4 weeks during which they had not received neuroleptic medication were compared to 30 age-matched normal comparison subjects.Analyses...

10.1176/ajp.150.9.1325 article EN American Journal of Psychiatry 1993-09-01

The outbreak of Coronavirus disease 2019 (COVID‐19) has caused a global health crisis. Nevertheless, no antiviral treatment yet been proven effective for treating COVID‐19 and symptomatic supportive cares have the most common treatment. Therefore, present study was designed to evaluate effects propolis Hyoscyamus niger L. extract in patients with COVID‐19. This randomized clinical trial conducted on 50 cases referred Akhavan Sepehri Clinics, Kashan university medical sciences, Iran. Subjects...

10.1002/ptr.7116 article EN Phytotherapy Research 2021-04-15

ABSTRACT Background and Aims Viral infections are significant contributors to infertility. This study aimed determine the prevalence of Herpes Simplex Virus 1 2 (HSV‐1/HSV‐2) cytomegalovirus (CMV) in men with infertility, compared a control group fertile men. Methods A cross‐sectional was conducted seminal fluid samples from 100 infertile men, aged 20–40 years, referred Yazd Infertility Center. DNA extraction done using AmpliSens kit, presence CMV HSV‐1/HSV‐2 determined via real‐time PCR....

10.1002/hsr2.70221 article EN cc-by Health Science Reports 2025-02-01

Abstract Sequential albumin‐Gd‐DTPA and Gd‐DTPA dynamic enhancement studies were performed in an animal tumor model for the comparison of regional vascularity permeability parameters measured by these two different sizes contrast agents. The early arises from vascular compartment, averaged signal derived first 3 to 6 images postinjection can be reliably used assess vascularity. intensity during period 5‐10 min post‐albumin‐Gd‐DTPA injection shows a steady linear variation. intercept...

10.1002/mrm.1910340318 article EN Magnetic Resonance in Medicine 1995-09-01

10.1016/0020-708x(84)90184-4 article EN The International Journal of Applied Radiation and Isotopes 1984-06-01

The incubation period of COVID-19 symptoms, along with the proliferation and high transmission rate SARS-CoV-2 virus, is cause an uncontrolled epidemic worldwide. Vaccination front line prevention, antiinflammatory antiviral drugs are treatment this disease. In addition, some herbal therapy approaches can be a good way to deal aim study was evaluate effect propolis syrup Hyoscyamus niger L. extract in hospitalized patients acute disease conditions double-blinded approach. performed on 140...

10.1002/ptr.8047 article EN Phytotherapy Research 2023-11-22

This study investigated the relationship between regional glucose metabolism with intellectual impairment in patients Parkinson's disease using statistical parametric mapping. Regional cerebral [18F]deoxyglucose (FDG) PET scans were performed on 10 disease. We used score from UPDRS. analyzed SPM96. Patients showed significant positive correlations left limbic structures such as cingulate gyrus, parahippocampal and medial frontal gyrus. negative associative neocortical posterior bilateral...

10.1097/00001756-200007140-00016 article EN Neuroreport 2000-07-01

10.1016/0883-2897(91)90076-w article EN International Journal of Radiation Applications and Instrumentation Part B Nuclear Medicine and Biology 1991-01-01

Thymocyte selection-associated high mobility group box protein (TOX) and members of the nuclear receptor 4A (NR4A) are known as transcription factors involved in T cell exhaustion.

10.22034/iji.2023.97902.2537 article EN PubMed 2023-12-31
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