Nutritional and Metabolic Diseases

All Conditions

Neoplasms

Nervous System Diseases

Dyslipidemias

Brain Neoplasms

Central Nervous System Neoplasms

Nervous System Neoplasms

All Drugs and Chemicals

Hormones

Hormone Antagonists

childhood cancer survivals after complex management of cranial and craniospinal tumors formed the main group

Echocardiography - standart protocol. Pulse wave characteristics were obtained using finger photopletysmography (PPG) (Angioscan-01, AngioScan-Electronics) from an infrared light sensor. Endothelial function was also evaluated using occlusion index and shear rate during post-occlusive reactive hyperemia (PORH). CPET was conducted on a treadmill (Intertrack 8100, Schiller, Switzerland) with a breath-by-breath algorithm of gas exchange analysis (Cardiovit CS-200 Ergo-Spiro, Schiller, Switzerland), using Bruce, modified Bruce or Naughton protocols depending on the level of physical tolerance.

12-lead ECG, hormone and lipid blood tests, echocardiography (Echo-CG), cardiopulmonary exercise testing (CPET) and pulse wave analysis

The purpose of research is to study to adverse cardiovascular disorder and risks factors in childhood cranial and craniospinal tumors survivors. In this research the investigators investigate cardiological instrumental diagnostic, such as electrocardiography, echocardiography with the determination of global longitudinal strain, cardiopulmonary exercise test, and diagnostic of endothelial function by Angioscan for the prediction of cardiovascular complications after cranial and craniospinal radiotherapy and chemotherapy.

Cardiovascular disease, after recurrence of the original cancer and development of second primary cancers, has been reported to be the leading cause of premature mortality among long-term childhood cancer survivors. Childhood cancer survivors after chemotherapy and radiotherapy for cranial and craniospinal tumors are at increased risk of transient ischemic attack, ischemic stroke. The mechanisms of vascular damage are not well understood. Preventive measures are not developed.

The purpose of my research is to study to adverse cardiovascular disorder and risks factors in childhood cranial and craniospinal tumors survivors.

Cardiovascular risk factors monitoring and modification, development of nursing and follow-up guides of adult patients may improve outcomes in these patients after treatment for cranial and craniospinal tumors in childhood. Attempts to develop more individualized risk prediction for cardiovascular disease may help refine surveillance and counseling in the future.

This was an open prospective observational study. 68 people were enrolled in the study: 48 childhood cancer survivals after complex management of cranial and craniospinal tumors formed the main group, and 20 healthy people formed the control group.

Criteria of inclusion to the main group were: age 16-40 years, radiation and chemotherapy for cranial and craniospinal tumors in childhood or adolescence, completion of the therapy at least one year before enrollment, signed informed consent. There were three separate types of informed consent - for adults, for minors and for their parents. Minors were signing informed consent in the presence of their parents.

Criteria of inclusion to the control group for healthy volunteers were demographics comparable to the main group.

Criteria of exclusion were: standard contraindications to exercise testing, anemia, pregnancy, psychiatric disease, alcohol or drug abuse, active malignancy, acute infection.

The study has been approved by the local ethics committee. At baseline, all patients underwent comprehensive evaluation including collection of medical history, complete physical exam, 12-lead ECG, hormone and lipid blood tests, echocardiography (Echo-CG), cardiopulmonary exercise testing (CPET) and pulse wave analysis. Additional carotid duplex scanning was performed in patients after craniospinal radiation therapy.

Echocardiography Left ventricular (LV) systolic and diastolic function, cardiac chamber volumes, valve function and systolic pulmonary artery pressure were evaluated using conventional transthoracic 2D-echocardiography (Dimension/Vivid 7 PRO, General Electric Medical System, Norway) according to current guidelines. Left ventricle (LV) end diastolic volume (LVEDV), end systolic volume (LVESV) and ejection fraction (LVEF) were measured with the modified Simpson method.

Cardiopulmonary exercise testing CPET was conducted on a treadmill (Intertrack 8100, Schiller, Switzerland) with a breath-by-breath algorithm of gas exchange analysis (Cardiovit CS-200 Ergo-Spiro, Schiller, Switzerland), using Bruce, modified Bruce or Naughton protocols depending on the level of physical tolerance. The researchers evaluated VO2 peak (highest oxygen uptake attained during exercise) and METs as its derivative, percentage from predicted VO2 peak (based on age, sex, height, and weight), anaerobic threshold (AT, defined by the V-slope method as the level of oxygen uptake at the moment of dislinear rise in minute ventilation and CO2 output relative to VO2, reflecting the shift to anaerobic metabolism and bicarbonate buffering of increased lactic acid), O2 pulse (VO2 peak/peak heart rate), ventilatory equivalent for carbon dioxide (VE/VCO2 slope), end-tidal CO2 pressure at rest and at peak exercise (PetCO2 rest and PetCO2 peak). Patient's effort was considered substantial if the self-reported number using a 1-10 modified Borg scale was ≥ 7 points and respiratory exchange ratio (RER, defined as VCO2/VO2 ratio) was ≥1.0.

Endothelial function assessment Pulse wave characteristics were obtained using finger photopletysmography (PPG) (Angioscan-01, AngioScan-Electronics) from an infrared light sensor. The amount of light transmitted to the finger directly depends on the alterations in its blood flow. The signal obtained during PPG is displayed as a digital volume pulse (DVP) waveform. This wave usually demonstrates two deflections: an early systolic peak (a), reflecting a direct pressure wave propagation from the left ventricle to the finger, and the diastolic peak (b), that reflects backward pressure wave propagation to the aorta. The time between these two peaks (peak-to-peak time, PPT) is proportional to the subject's height. We measured large artery stiffness index (SI, a ratio between the length of aorta calculated automatically based on height to PPT), reflection index of small resistive arteries (RI, calculated as b/a x 100%), augmentation index (AI, defined as the ratio between late and early systolic pulse wave peaks, expressed as percent from the pulse pressure) and augmentation index normalized for pulse rate of 75 beats per minute (AIp75%) with regard to the fact that the heart rate has a major impact on the augmentation of pulse pressure. Endothelial function was also evaluated using occlusion index and shear rate during post-occlusive reactive hyperemia (PORH) representing the magnitude of limb reperfusion after a brief period of brachial artery occlusion. The probe was performed in the morning hours in supine position after 15 minutes of rest in a comfortable quiet warm environment according to a standardized protocol on subject preparation (fasting state, restriction of moderate-to-high physical activity, nicotine, alcohol, caffeine or other vasoactive drugs 24 hours before the probe).

Statistical analysis Microsoft Excel spreadsheet application was used for data storage and preparation for future analysis. Statistical analysis was performed using Prism 9.2.0 software. Python software was applied for multiple logistic regression models. The continuous data were expressed as a mean value (M) ± standard deviation (SD) with a 95% confidence interval (CI). Categorical variables were presented in absolute numbers and percentage and computed by using two-tailed Fischer's exact test. Normality of distribution for quantitative variables was tested using Anderson-Darling test as the first step and using Student t-test or Mann-Whitney U-test as the second step. Normality of distribution was initially evaluated as well before correlation analysis with a Pearson coefficient for normal data and with a Spearmen coefficient for non-normal data. Multiple regression models were performed considering multiple testing of hypotheses. The results of the study were presented as histograms with pairwise comparison of correlation matrices. P-value \<0.05 was considered significant.

Cardiovascular Disorders and Risk Factors in Childhood Cranial and Craniospinal Tumors Survivors

change сoncentration of total cholesterol \>5 mmol/l, change сoncentration of LDL \> 3 mmol/l, сoncentration of HDL \<1,2 mmol/l, change сoncentration of TG \>1,7 mmol/

change in endothelial function by Angioscan

change anaerobic threshold\<14,0 ml/kg/min

I.M. Sechenov First Moscow State Medical University

Diseases and Abnormalities at or Before Birth

Symptoms and General Pathology

Skin and Connective Tissue Diseases

Rare Diseases

Neurofibromatoses

Neurofibromatosis 1

Neurofibroma

Nerve Sheath Neoplasms

Neoplasms, Nerve Tissue

Neoplasms by Histologic Type

Syndrome

Neoplastic Syndromes, Hereditary

Neurocutaneous Syndromes

Heredodegenerative Disorders, Nervous System

Neurodegenerative Diseases

Genetic Diseases, Inborn

Peripheral Nervous System Diseases

Neuromuscular Diseases

Peripheral Nervous System Neoplasms

Neurofibromatosis

Neurofibromatosis Type 1

One time collection of a 20 ml blood sample

Collection of Stem Cells

Roger Packer, MD

Objectives 1. Establish an induced pluripotent stem cell (iPSC) bank for phenotypically well-characterized patients with NF1.

2. Develop isogenic NF1 wild-type (NF1+/+), NF1 heterozygous (NF1+/-) and NF1 homozygous (NF1-/-) iPSC lines from individual patients using CRISPR/CAS9 technology.

3. Differentiate and characterize disease-relevant brain cells such as excitatory and inhibitory neurons, astrocytes and oligodendrocytes from patient-specific iPSC lines.

4. Screen and identify the drug(s) that can reverse or alleviate the disease phenotypes.

Hypothesis: Subjects with NF1 and central nervous system tumors who have aggressive lesions (including, but not limited to optic pathway gliomas) and/or those with tumors causing neurologic (including visual) morbidity will manifest unique differences in their stem cells and stem cell-derived differentiated cells compared to patients with NF1 and central nervous system tumors who have less aggressive disease and/or those with tumors causing minimal to no morbidity.

Background and Significance: Optic pathway gliomas (OPGs) are low-grade astrocytic tumors primarily involving the optic nerve, chiasm and tracts that occur mainly in children. Nearly 20% of children with Neurofibromatosis type 1 (NF1) will develop OPGs, although less than half will develop vision loss from their tumor.1 These tumors have excellent survival outcomes, making vision loss the primary morbidity in these patients. Furthermore, OPGs are inherent to the visual pathway, therefore they are rarely, if ever biopsied. This paucity of OPG tissue limits our ability to clarify the biologic differences between OPGs that cause vision loss and those that do not. Low-grade astrocytic gliomas in the other regions of the brain including the hypothalamus, brainstem and cerebellum can also be found in a subset of children associated with NF1. These NF1-associated brain tumors can progress and also grow at variable rates and may cause neurologic dysfunction ranging from severe compromise to little or no symptomality.

This study seeks to develop stem cells lines in children with NF1-related tumors in the central nervous system (the optic nerve and those from other brain sites). Stem cells from these subjects will provide a critical insight into the mechanisms responsible for tumor progression and symptoms associated with the central nervous system, accelerating the identification of therapeutic targets.

Preliminary Studies: Three recent research developments make it possible to develop a patient-specific disease model in a dish (so-called "human disease model in dish") and to study induced pluripotent stem cell (iPSC)-derived disease relevant cells in an isogenic background. First, embryonic stem cell (ESC)-like cells, also known as induced pluripotent stem cell or iPSC, can be generated from skin or blood cells in adult patients. Second, recent research efforts have started to develop culture protocols that differentiate iPSCs into a variety of cell types in the central and peripheral nervous system (CNS and PNS), which are affected in NF1 patients. Third, the CRISPR/CAS9 technology allows to genetically edit the specific disease genes either by repairing the existing mutant genes or creating new mutations. In order to position at the forefront of NF1 research, it will be important for the Gilbert Family Neurofibromatosis Institute (GFNI) at the Children's National Medical Center to explore these recent exciting research developments, to systematically develop patient-specific human NF1 disease models, and to provide a tool for drug screening and evaluation on the individual NF patients.

Design and Methods:

3.1 Study Design Cross-sectional collection of NF1 subjects with tumors in the central nervous system as documented by MRI.

3.2 Study Visits Subjects will have only one visit to collect the blood sample.

3.3 Study Procedures 3.31 Blood Draw Subjects have 20 ml of whole blood drawn during either 1)their sedation for their clinically indicated MRI (IV already being placed for clinical purpose) or through the outpatient laboratory.

3.32 Stem Cell Processing Blood collected will be immediately transferred to the stem cell facility at the National Institutes of Health for processing of the specimens in order to develop stem cell lines.

3.33 Demographics We will collect the subject's age, gender, race, ethnicity, location of tumors in the central nervous system on MRI, history of vision loss and other neurological deficits.

3.34 Statistical Analysis As a first step to establish a stem cell library from a specific population of NF1 children with nervous system tumors, we will not need statistical analysis at this stage.

20 ml of whole blood obtained to develop stem cell lines

Stem Cells in NF1 Patients With Tumors of the Central Nervous System

Development of Stem Cell Lines in Children With Neurofibromatosis Type 1 and Tumors of the Central Nervous System

The stem-cell characteristics of patient-derived induced pluripotent stem cell (iPSC) lines will be measured and reported.

The status of NF1 gene will be measured for the isogenic NF1 wild-type (NF1+/+), NF1 heterozygous (NF1+/-) and NF1 homozygous (NF1-/-) iPSC lines. The stem cell characteristics of isogenic NF1 iPSC lines will be measured.

Differentiate between and characterize the disease-relevant brain cells (excitatory and inhibitory interneurons, astrocytes, and oligodendrocytes) of the patient's iPSC (induced pluripotent stem cell) lines.

After characterizing the disease-relevant brain cells (excitatory and inhibitory neurons, astrocytes, and oligodendrocytes) from patient-specific iPSC lines, screen and identify the drug(s) that can reverse or alleviate the specific disease phenotypes.

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization
Cardiovascular Disorders and Risk Factors in Childhood Cranial and Craniospinal Tumors Survivors	NCT05641636	Tumors of the C... Childhood Cance...	12-lead ECG, ho...	16 Years - 40 Years	I.M. Sechenov First Moscow State Medical University
Cardiovascular Disorders and Risk Factors in Childhood Cranial and Craniospinal Tumors Survivors	NCT05641636	Tumors of the C... Childhood Cance...	12-lead ECG, ho...	16 Years - 40 Years	I.M. Sechenov First Moscow State Medical University
Stem Cells in NF1 Patients With Tumors of the Central Nervous System	NCT03332030	Neurofibromatos... Tumors of the C...	Collection of S...	-	Children's National Research Institute

Spots Global Cancer Trial Database for tumors of the central nervous system