Exploring the Possibility to Use Glycosyltransferase as a Prognosis Marker of Neuroblastoma

Study Overview
=================
Brief Summary
-----------------
Well-regulated glycosylation is essential for the normal development of the nervous system. Altered expression of glycosyltransferases with resulting dysregulated glycosylation of neuroblastic cells might lead to the development of NB. The β1,4-N-acetylgalactosaminyltransferase III (B4GALNT3) exhibits GalNAc transferase activity to form the GalNAcβ1,4GlcNAc (LacdiNAc or LDN) structure. The Drosophila B4GALNTA, homolog of human B4GALNT3, has been suggested to regulate the neuronal development. By immunohistochemical studies, we demonstrated that the expression of B4GALNT3 correlated well with histological grade of differentiation in NB tumor samples. Since well differentiated tumors usually carry a better prognosis, we thus speculate that expression of B4GALNT3 in tumor tissues can a favorable prognostic factor of NB. To explore the role of B4GALNT3 in the prognosis of NB, we propose the following project with two specific aims: Aim Ⅰ: Establishing the significance of B4GALNT3 in the prognosis of NB: We plan to collect 90 NB tumor samples, and evaluate the RNA and protein expression levels by Q-PCR, Western blot, and immunohistochemistry in the tumor samples. The results will be compared with the other clinicopathological and biological factors of NB. Also the expression levels of B4GALNT3 in tumor tissues will be correlated to the patients' outcome to clarify whether B4GALNT3 could be a prognosis marker of NB. Aim II: Clarifying the effects of B4GALNT3 on NB cell behavior in vitro and in vivo. For further strengthening the prognostic role of B4GALNT3 in NB, NB cell phenotype and behavior changes after overexpression or knock-down of B4GALNT3 are evaluated by in vitro assays as well as by a nude mice xenograft model. In summary, if our project can establish the role of B4GALNT3 expression in NB, we may further subclassify the NB patients, and give the NB patients more appropriate therapies to improve patients' outcome. Furthermore, B4GALNT3 could potentially serves as a therapeutic target in the future.

Official Title
-----------------
Exploring the Possibility to Use Glycosyltransferase as a Prognosis Marker of Neuroblastoma

Conditions
-----------------
Neuroblastoma

Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Neuroblastoma patients with complete follow-up and sufficient samples for study Exclusion Criteria: Neuroblastoma patients without complete follow-up or sufficient samples for study

Ages Eligible for Study
-----------------
Maximum Age: 18 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| neuroblastoma patients<br> | |

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Neuroblastoma, B4GALNT3, Prognosis