Correlation Between Optic Nerve Vessel Anomalies, Serum Angiogenic Factors and Renal Anomalies in Down Syndrome Children

NCT ID: NCT03206957

Last Updated: 2018-07-05

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

200 participants

Study Classification

INTERVENTIONAL

Study Start Date

2017-11-30

Study Completion Date

2019-06-01

Brief Summary

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In approximately half of individuals with Down syndrome, an higher than normal number of vessels cross the optic disc margin. Investigator hypothesize that early retinal vessel branching occurs due to inhibition of angiogenesis by triplet overexpression of endostatin, an angiogenesis inhibitor encoded on chromosome 21. Since angiogenesis is critical in the development of eyes and other organs angiogenesis depended (specially kidney, brain, and recently described lungs and heart), early branching of retinal vessels at the level of the optic disc would also likely result in abnormal renal and other organs development in these individuals. Investigator wish to determine whether observation of optic disc vessels may serve as an indicator of elevated endostatin levels and other angiogenesis-dependent organs anomalies.

Detailed Description

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Investigator will measure the serum levels of endostatin as well as others angiogenetic factors in Down syndrome children versus control group 1 constituted by the patient mothers.

Investigator will also perform renal and low urinary tract Doppler ultrasound with measurement of renal dimension in order to determine if the kidneys of patients with high level of serum of endostatin are smaller than those of patients with normal level of endostatin. Data observed in Down syndrome children will be compared to control group 2age constituted by sex and age matched healthy children Urine microalbuminuria and urine microalbuminuria/creatinuria from the first urine in the morning will be evaluated.

Conditions

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Down Syndrome

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

Interventional controlled cross-sectional study
Primary Study Purpose

DIAGNOSTIC

Blinding Strategy

NONE

Study Groups

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Study group

Down Syndrome children

Group Type OTHER

Funduscopic examination and retinal photography

Intervention Type DIAGNOSTIC_TEST

A standardized funduscopic examination and retinal photography will be performed by an ophthalmologist focusing on optic nerve.

Serum levels of endostatin and angiogenesis factors

Intervention Type DIAGNOSTIC_TEST

Serum levels of endostatin, angiopoietin and vaso endothelial growth factor will be analyzed

Renal and low urinary tract Doppler ultrasound

Intervention Type DIAGNOSTIC_TEST

Measurements of each kidney will include maximum renal bipolar length in a sagittal plane, renal width and thickness in an axial plane perpendicular to each other at the level of renal hilum and cortical thickness. Intensity of corticomedullary differentiation will estimated.

Doppler ultrasound examination will assess renal arterial resistivity indexes

Urinalysis

Intervention Type DIAGNOSTIC_TEST

Urinalysis assessments will include assessments of microalbuminuria and microalbuminuria to creatinuria ratio. A spot urine sample will be collected from first morning void.

Anthropometric measures and vitals signs

Intervention Type DIAGNOSTIC_TEST

weight, height and blood pressure will be assessed

Control group n°1

Down Syndrome children's mothers

Group Type OTHER

Funduscopic examination and retinal photography

Intervention Type DIAGNOSTIC_TEST

A standardized funduscopic examination and retinal photography will be performed by an ophthalmologist focusing on optic nerve.

Serum levels of endostatin and angiogenesis factors

Intervention Type DIAGNOSTIC_TEST

Serum levels of endostatin, angiopoietin and vaso endothelial growth factor will be analyzed

Control group n°2

Age and sex matched healthy children

Group Type OTHER

Funduscopic examination and retinal photography

Intervention Type DIAGNOSTIC_TEST

A standardized funduscopic examination and retinal photography will be performed by an ophthalmologist focusing on optic nerve.

Renal and low urinary tract Doppler ultrasound

Intervention Type DIAGNOSTIC_TEST

Measurements of each kidney will include maximum renal bipolar length in a sagittal plane, renal width and thickness in an axial plane perpendicular to each other at the level of renal hilum and cortical thickness. Intensity of corticomedullary differentiation will estimated.

Doppler ultrasound examination will assess renal arterial resistivity indexes

Urinalysis

Intervention Type DIAGNOSTIC_TEST

Urinalysis assessments will include assessments of microalbuminuria and microalbuminuria to creatinuria ratio. A spot urine sample will be collected from first morning void.

Anthropometric measures and vitals signs

Intervention Type DIAGNOSTIC_TEST

weight, height and blood pressure will be assessed

Control group n°3

Down syndrome children's healthy siblings

Group Type OTHER

Funduscopic examination and retinal photography

Intervention Type DIAGNOSTIC_TEST

A standardized funduscopic examination and retinal photography will be performed by an ophthalmologist focusing on optic nerve.

Serum levels of endostatin and angiogenesis factors

Intervention Type DIAGNOSTIC_TEST

Serum levels of endostatin, angiopoietin and vaso endothelial growth factor will be analyzed

Interventions

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Funduscopic examination and retinal photography

A standardized funduscopic examination and retinal photography will be performed by an ophthalmologist focusing on optic nerve.

Intervention Type DIAGNOSTIC_TEST

Serum levels of endostatin and angiogenesis factors

Serum levels of endostatin, angiopoietin and vaso endothelial growth factor will be analyzed

Intervention Type DIAGNOSTIC_TEST

Renal and low urinary tract Doppler ultrasound

Measurements of each kidney will include maximum renal bipolar length in a sagittal plane, renal width and thickness in an axial plane perpendicular to each other at the level of renal hilum and cortical thickness. Intensity of corticomedullary differentiation will estimated.

Doppler ultrasound examination will assess renal arterial resistivity indexes

Intervention Type DIAGNOSTIC_TEST

Urinalysis

Urinalysis assessments will include assessments of microalbuminuria and microalbuminuria to creatinuria ratio. A spot urine sample will be collected from first morning void.

Intervention Type DIAGNOSTIC_TEST

Anthropometric measures and vitals signs

weight, height and blood pressure will be assessed

Intervention Type DIAGNOSTIC_TEST

Eligibility Criteria

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Inclusion Criteria

* Provision of personally signed and dated informed consent document by adult subject or parents
* When capable of providing assent, provision of personally signed and dated informed assent document by children
* Subjects and/or their caregivers/parents are willing and able to comply with scheduled laboratory tests, and other required study procedures.

Exclusion Criteria

• Inability to cooperate with study related examination

For "Study Group" subjects

* Known chronic diseases unrelated to their triallelic condition For "Control Group n°1" \& "Control Group n°3"
* General disease in which the level of endostatin may be modified such as leukemia, cancers, inflammatory diseases (e.g.: rheumatoid arthritis, Crohn's disease, psoriasis)
* Any condition that may cause a hypoxia
* Pregnancy

For "Control Group n°2":

* Healthy children except benign ophthalmological refraction anomalies
* Any known renal or low urinary tract diseases.
Maximum Eligible Age

17 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Queen Fabiola Children's University Hospital

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Lavina Postolache, MD

Role: PRINCIPAL_INVESTIGATOR

Queen Fabiola Children's University Hospital

Locations

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Hôpital Universitaire Des Enfants Reine Fabiola

Brussels, , Belgium

Site Status RECRUITING

Countries

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Belgium

Central Contacts

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Lavina Postolache, MD

Role: CONTACT

0032 2 477 21 92

Facility Contacts

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Lavina Postolache, MD

Role: primary

0032 2 477 21 92

Other Identifiers

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P2017/Ophtalmo/DOPANUR

Identifier Type: -

Identifier Source: org_study_id

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