MLLT11/AF1q is differentially expressed in maturing neurons during development.

Area of Science:

• Neuroscience
• Developmental Biology
• Molecular Biology

Background:

• Myeloid/lymphoid or mixed-lineage leukemia; translocated to chromosome 11 or ALL1 fused from chromosome 1q (MLLT11/AF1q) is a conserved protein involved in hematopoietic differentiation.
• MLLT11 translocations are linked to hematopoietic malignancies.
• The spatio-temporal expression of MLLT11 during embryonic development is largely unknown.

Purpose of the Study:

• To characterize the spatio-temporal expression profile of MLLT11 during embryonic development.
• To investigate the role of MLLT11 in the central and peripheral nervous system development.

Main Methods:

• Analysis of MLLT11 transcript and protein expression using techniques such as in situ hybridization and immunohistochemistry.
• Co-localization studies with known neural markers like Tbr2 and Tuj1.

Main Results:

• MLLT11 exhibits a specific expression pattern in the developing central nervous system (CNS), particularly in the marginal zone of the cortex and spinal cord.
• High MLLT11 expression was observed in cranial and dorsal root ganglia of the peripheral nervous system (PNS) starting from embryonic day 9.5.
• MLLT11 was also detected in the inner retinal layer of the eye and in autonomic neurons of the gastrointestinal tract.

Conclusions:

• MLLT11 is identified as a pan-neuronal marker.
• The findings suggest a significant role for MLLT11 in both CNS and PNS neural differentiation, particularly in neural crest-derived ganglia.