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Cristina Ramona Cudalbu

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Publications associées (122)

High field brain proton magnetic resonance spectroscopy and volumetry in children with chronic, compensated liver disease-A pilot study

Sarah Lachat, Lijing Xin, Bénédicte Marie Maréchal, Cristina Ramona Cudalbu

Background: There is increasing evidence that children or young adults having acquired liver disease in childhood display neurocognitive impairment which may become more apparent as they grow older. The molecular, cellular and morphological underpinnings o ...

ACADEMIC PRESS INC ELSEVIER SCIENCE2023

Overview of oxidative stress findings in hepatic encephalopathy: From cellular and ammonium-based animal models to human data

Cristina Ramona Cudalbu, Dunja Simicic

Oxidative stress is a natural phenomenon in the body. Under physiological conditions intracellular reactive oxygen species (ROS) are normal components of signal transduction cascades, and their levels are maintained by a complex antioxidants systems partic ...

ACADEMIC PRESS INC ELSEVIER SCIENCE2022

Abnormal brain oxygen homeostasis in an animal model of liver disease

Katarzyna Pierzchala, Cristina Ramona Cudalbu, Dunja Simicic

Background & Aims: Increased plasma ammonia concentration and consequent disruption of brain energy metabolism could underpin the pathogenesis of hepatic encephalopathy (HE). Brain energy homeostasis relies on effective maintenance of brain oxygenation, an ...

ELSEVIER2022

Central Nervous System Oxidative Stress Interplay With Inflammation In A Rat Model Of Type C Hepatic Encephalopathy - Brothers In Arms?

Katarzyna Pierzchala, Cristina Ramona Cudalbu, Stefanita-Octavian Mitrea, Dunja Simicic

ELSEVIER SCIENCE INC2022

Central nervous system and systemic oxidative stress interplay with inflammation in a bile duct ligation rat model of type C hepatic encephalopathy

Andrzej Sienkiewicz, Rolf Gruetter, Katarzyna Pierzchala, Cristina Ramona Cudalbu, Stefanita-Octavian Mitrea, Dunja Simicic

The role and coexistence of oxidative stress (OS) and inflammation in type C hepatic encephalopathy (C HE) is a subject of intense debate. Under normal conditions the physiological levels of intracellular reactive oxygen species are controlled by the count ...

2022

Central nervous system and systemic oxidative stress interplay with inflammation in a bile duct ligation rat model of type C hepatic encephalopathy (vol 178, pg 295, 2022)

Andrzej Sienkiewicz, Rolf Gruetter, Katarzyna Pierzchala, Cristina Ramona Cudalbu, Stefanita-Octavian Mitrea, Dunja Simicic

ELSEVIER SCIENCE INC2022

MP-PCA denoising for diffusion MRS data: promises and pitfalls

Cristina Ramona Cudalbu, Dunja Simicic, Jessie Julie Mosso

Diffusion-weighted (DW) magnetic resonance spectroscopy (MRS) suffers from a lower signal to noise ratio (SNR) compared to conventional MRS owing to the addition of diffusion attenuation. This technique can therefore strongly benefit from noise reduction s ...

ACADEMIC PRESS INC ELSEVIER SCIENCE2022

Quantitative FDG-PET and 1H-MRS reveal altered glucose uptake and neurometabolic profiles in BDL rats

Bernard Lanz, Carole Poitry-Yamate, Cristina Ramona Cudalbu, Mario Gaetano Lepore, Dunja Simicic, Ting Yin, Jessie Julie Mosso

SAGE PUBLICATIONS INC2022

PET CMRglc mapping and H-1-MRS show altered glucose uptake and neurometabolic profiles in BDL rats

Bernard Lanz, Carole Poitry-Yamate, Cristina Ramona Cudalbu, Mario Gaetano Lepore, Dunja Simicic, Ting Yin, Jessie Julie Mosso

Type C hepatic encephalopathy (HE) is a complex neuropsychiatric disorder occurring as a consequence of chronic liver disease. Alterations in energy metabolism have been suggested in type C HE, but in vivo studies on this matter remain sparse and have repo ...

ACADEMIC PRESS INC ELSEVIER SCIENCE2022

Late post‐natal neurometabolic development in healthy male rats using 1 H and 31 P Magnetic Resonance Spectroscopy

Rolf Gruetter, Cristina Ramona Cudalbu, Guillaume Donati, Veronika Rackayová, Dunja Simicic

Brain metabolism evolves rapidly during early post‐natal development in the rat. While changes in amino acids, energy metabolites, antioxidants or metabolites involved in phospholipid metabolism have been reported in the early stages, neurometabolic change ...

2021

Metabolic and transcriptomic profiles of glioblastoma invasion revealed by comparisons between patients and corresponding orthotopic xenografts in mice

Lijing Xin, Cristina Ramona Cudalbu, Mario Gaetano Lepore, Marta Lai

The invasive behavior of glioblastoma, the most aggressive primary brain tumor, is considered highly relevant for tumor recurrence. However, the invasion zone is difficult to visualize by Magnetic Resonance Imaging (MRI) and is protected by the blood brain ...

2021

The first knock-in rat model for glutaric aciduria type I allows further insights into pathophysiology in brain and periphery

Cristina Ramona Cudalbu

Glutaric aciduria type I (GA-I, OMIM # 231670) is an inborn error of metabolism caused by a deficiency of glutaryl-CoA dehydrogenase (GCDH). Patients develop acute encephalopathic crises (AEC) with striatal injury most often triggered by catabolic stress. ...

ACADEMIC PRESS INC ELSEVIER SCIENCE2021

A new rat model of creatine transporter deficiency reveals behavioral disorder and altered brain metabolism

Maria del Carmen Sandi Perez, Cristina Ramona Cudalbu, Jocelin Grosse, Dunja Simicic

Creatine is an organic compound used as fast phosphate energy buffer to recycle ATP, important in tissues with high energy demand such as muscle or brain. Creatine is taken from the diet or endogenously synthetized by the enzymes AGAT and GAMT, and specifi ...

Nature Research2021

Hyperpolarized C-13-glucose magnetic resonance highlights reduced aerobic glycolysis in vivo in infiltrative glioblastoma

Arnaud Comment, Bernard Lanz, Rolf Gruetter, Cristina Ramona Cudalbu, Mor-Miri Mishkovsky, Jocelyne Bloch

Glioblastoma (GBM) is the most aggressive brain tumor type in adults. GBM is heterogeneous, with a compact core lesion surrounded by an invasive tumor front. This front is highly relevant for tumor recurrence but is generally non-detectable using standard ...

Nature Research2021

Minimum Reporting Standards for in vivo Magnetic Resonance Spectroscopy (MRSinMRS): Experts' consensus recommendations

Cristina Ramona Cudalbu

The translation of MRS to clinical practice has been impeded by the lack of technical standardization. There are multiple methods of acquisition, post-processing, and analysis whose details greatly impact the interpretation of the results. These details ar ...

WILEY2021

2021 ISHEN guidelines on animal models of hepatic encephalopathy

Cristina Ramona Cudalbu

This working group of the International Society of Hepatic Encephalopathy and Nitrogen Metabolism (ISHEN) was commissioned to summarize and update current efforts in the development and characterization of animal models of hepatic encephalopathy (HE). As d ...

WILEY2021

In vivo macromolecule signals in rat brain 1 H‐MR spectra at 9.4T: Parametrization, spline baseline estimation, and T 2 relaxation times

Bernard Lanz, Lijing Xin, Cristina Ramona Cudalbu, Veronika Rackayová, Dunja Simicic

Purpose Reliable detection and fitting of macromolecules (MM) are crucial for accurate quantification of brain short-echo time (TE) 1H-MR spectra. An experimentally acquired single MM spectrum is commonly used. Higher spectral resolution at ultra-high fiel ...

Wiley2021

Probiotics improve the neurometabolic profile of rats with chronic cholestatic liver disease

Cristina Ramona Cudalbu, Jocelin Grosse, Emmanuelle Ines Flatt, Veronika Rackayová

Chronic liver disease leads to neuropsychiatric complications called hepatic encephalopathy (HE). Current treatments have some limitations in their efficacy and tolerability, emphasizing the need for alternative therapies. Modulation of gut bacterial flora ...

Nature Research2021

Probiotics combined with rifaximin influence the neurometabolic changes in a rat model of type C HE

Rolf Gruetter, Katarzyna Pierzchala, Cristina Ramona Cudalbu, Emmanuelle Ines Flatt

Type C hepatic encephalopathy (HE) is a neuropsychiatric disease caused by chronic liver disease. Management of type C HE remains an important challenge because treatment options are limited. Both the antibiotic rifaximin and probiotics have been reported ...

Nature Portfolio2021

Magnetic resonance spectroscopy in the rodent brain: Experts' consensus recommendations

Bernard Lanz, Rolf Gruetter, Lijing Xin, Cristina Ramona Cudalbu

In vivo MRS is a non-invasive measurement technique used not only in humans, but also in animal models using high-field magnets. MRS enables the measurement of metabolite concentrations as well as metabolic rates and their modifications in healthy animals ...

WILEY2020

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