Publications by authors named "Lihong Bu"

Parkinson's disease (PD) is a neurodegenerative disease characterized by the death of dopaminergic neurons in the substantia nigra and the formation of Lewy bodies that are composed of aggregated α-synuclein (α-Syn). However, the factors that regulate α-Syn pathology and nigrostriatal dopaminergic degeneration remain poorly understood. Previous studies demonstrate cholesterol 24-hydroxylase (CYP46A1) increases the risk for PD.

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Article Synopsis
  • The aggregation of α-synuclein (α-Syn) in peripheral organs, particularly the kidneys, is suggested to initiate the spread of Lewy body diseases (LBDs) like Parkinson's disease (PD) to the brain.
  • Research indicates that chronic renal failure may lead to increased α-Syn deposits in both the kidneys and brain of affected individuals, possibly explaining the higher incidence of PD in these patients.
  • Experiments in mice show that the kidney plays a role in clearing α-Syn from the blood, and renal damage can enhance its deposition in the kidney and subsequent propagation to the brain, highlighting the kidney's potential role in the pathogenesis of LBDs.
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Article Synopsis
  • Amyloidosis derived from apolipoprotein C-II (AApoCII) is a rare condition that primarily affects the kidneys, presenting with symptoms like proteinuria and reduced kidney function, particularly in older patients.
  • A study conducted with 25 cases from the Mayo Clinic revealed common histological characteristics, such as nodular amyloid deposits in glomeruli, and proteomic analysis identified specific Apo C-II variants in many patients.
  • Despite significant kidney issues, including end-stage kidney disease in about half of the patients, the overall survival rate was more favorable, indicating potential for better outcomes in this condition.
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Background: Neuromelanin is mostly located in dopaminergic neurons in the substantia nigra (SN) pars compacta, and can be detected by magnetic resonance imaging (MRI). It is a promising imaging-base biomarker for neurological diseases. We previously developed a melanin-specific probe N-(2-(diethylamino)-ethyl)-F-5-fluoropicolinamide (F-P3BZA), which was initially developed for the imaging of melanoma.

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Article Synopsis
  • VEXAS syndrome is a disease caused by a mutation that affects many organs, including the kidneys, which wasn't well studied before.
  • In a study of 81 men with this syndrome, 25% developed kidney problems, often coming back multiple times.
  • The research found that older age and certain test results can affect how quickly kidney problems start and that a specific type of kidney damage is common among patients.
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Rationale & Objective: Crystalglobulinemia is a rare syndrome characterized by intravascular crystallization of monoclonal immunoglobulins (MIg). Data on kidney involvement are limited to case reports. This series characterizes the clinicopathologic spectrum of crystalglobulin-induced nephropathy (CIN).

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Objectives: Sex-specific differences in internet gaming disorder (IGD) neurophysiology remain underexplored. Here we investigated sex-related variability in regional homogeneity (ReHo) and functional connectivity (FC) in IGD and their correlations with sleep quality.

Methods: Resting-state functional magnetic resonance imaging (fMRI) scans were performed on 52 subjects with IGD and 50 healthy controls (HCs).

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Objectives: Major Depressive Disorder (MDD) is significantly influenced by childhood trauma (CT), affecting brain anatomy and functionality. Despite the unique disease trajectory in MDD patients with CT, the underlying neurobiological mechanisms remain unclear. Our objective is to investigate CT's impact on the white matter structure of the brain in patients with MDD.

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Arterial spin labeling (ASL) can be used to detect differences in perfusion for multiple brain regions thought to be important in major depressive disorder (MDD). However, the potential of cerebral blood flow (CBF) to predict MDD and its correlations between the blood lipid levels and immune markers, which are closely related to MDD and brain function change, remain unclear. The 451 individuals - 298 with MDD and 133 healthy controls who underwent MRI at a single time point with arterial spin labelling and a high resolution T1-weighted structural scan.

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A 7-Year-Old Boy with Fever and Dark UrineA 7-year-old boy with surgically repaired tetralogy of Fallot presented for evaluation of fever and dark urine. How do you approach the evaluation, and what is the diagnosis?

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Objective: To report the clinicopathologic characteristics, prognostic indicators, prognosis, and transplant outcome of secondary oxalate nephropathy (ON).

Patients And Methods: We performed a retrospective analysis of 113 consecutive patients with secondary ON diagnosed at Mayo Clinic in Rochester, Minnesota, between January 1, 2001, and March 1, 2023.

Results: The incidence of secondary ON among all native biopsies from Mayo Clinic patients over the study period (n=11,617) was 0.

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Anxious depression is a common subtype of major depressive disorder (MDD) associated with adverse outcomes and severely impaired social function. It is important to clarify the underlying neurobiology of anxious depression to refine the diagnosis and stratify patients for therapy. Here we explored associations between anxiety and brain structure/function in MDD patients.

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Background: Fibronectin glomerulopathy is a rare genetic nephropathy with only a few cases of post-transplant recurrence being reported previously. We highlight a case that was initially misdiagnosed and emphasize the importance of full immunofluorescence and electron microscopy evaluation in allograft biopsies.

Case Presentation: A 36-year-old male with a history of end-stage kidney disease secondary to biopsy-proven type 1 membranoproliferative glomerulonephritis (MPGN) status-post living unrelated donor kidney transplant 12 years prior, presented with increasing creatinine and proteinuria.

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Article Synopsis
  • Primary membranous nephropathy (PMN) is rare in children, with limited existing data on its clinical course and histopathologic characteristics.
  • In a study of 21 children with PMN from three U.S. centers, researchers identified novel antigens in biopsy specimens and correlated these findings with clinical outcomes.
  • Results showed a good prognosis for most children, with about 60% testing positive for novel antigens like PLA2R and EXT1, which were linked to higher remission rates.
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Unlabelled: The mesenchymal epithelial transition factor (c-Met) is frequently overexpressed in numerous cancers and has served as a validated anticancer target. Inter- and intra-tumor heterogeneity of c-Met, however, challenges the use of anti-MET therapies, highlighting an urgent need to develop an alternative tool for visualizing whole-body c-Met expression quantitatively and noninvasively. Here we firstly reported an F labeled, small-molecule quinine compound-based PET probe, 1-(4-(5-amino-7-(trifluoromethyl) quinolin-3-yl) piperazin-1-yl)-2-(fluoro-[18F]) propan-1-one, herein referred as [18F]-AZC.

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Cerebrotendinous xanthomatosis (CTX), an autosomal recessive disorder characterized by high levels of cholestanol in the blood and accumulation of cholestanol in multiple tissues, especially the brain, often presents in parkinsonism. However, it remains unknown whether cholestanol plays a role in the pathogenesis of sporadic Parkinson's disease (PD). Here, we show that the levels of serum cholestanol in patients with sporadic PD are higher than those in control participants.

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Introduction: Patients with inflammatory bowel disease (IBD; ulcerative colitis [UC] and Crohn's disease [CD]) may have unique patterns of kidney injury related to their underlying or coexisting disease or to medications. We present the kidney biopsy findings and clinical outcomes of veterans with UC or CD from the US Department of Veteran's Affairs (VA) health system.

Methods: Histopathologic and clinical data were extracted by retrospective review of the VA electronic health record of patients with IBD and a kidney biopsy between 2000 and 2018.

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Parkinsonism is a clinical syndrome that is caused by Parkinson's disease (PD) and other neurodegenerative diseases. Here, we report a patient who exhibited progressive parkinsonism, epilepsy, and cognitive impairment and was diagnosed with adult-onset neuronal ceroid lipofuscinoses (ANCLs). The patient carries a mutation (p.

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Introduction: Lysozyme-associated nephropathy (LyN), a rare cause of kidney injury in patients with chronic myelomonocytic leukemia (CMML), has not been well described to date. We report the clinicopathologic spectrum of LyN from a multi-institutional series.

Method: We identified 37 native kidney biopsies with LyN and retrospectively obtained clinicopathologic data.

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Synucleinopathies are characterized by the accumulation of α-synuclein (α-Syn) aggregates in the brain. Positron emission tomography (PET) imaging of synucleinopathies requires radiopharmaceuticals that selectively bind α-Syn deposits. We report the identification of a brain permeable and rapid washout PET tracer [F]-F0502B, which shows high binding affinity for α-Syn, but not for Aβ or Tau fibrils, and preferential binding to α-Syn aggregates in the brain sections.

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Cysteine cathepsin B (CTS-B) is a crucial enzyme that is overexpressed in numerous malignancies and contributes to the invasion and metastasis of cancer. Therefore, this study sets out to develop and evaluate an activity-based multimodality theranostic agent targeting CTS-B for cancer imaging and therapy. A CTS-B activity-based probe, BMX2, was synthesized and labeled efficiently with Ga and Y to produce Ga-BMX2 for multimodality imaging and Y-BMX2 for radiation therapy.

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