# Patterning and Formation of the Neuromuscular Junction

> **NIH NIH R01** · UT SOUTHWESTERN MEDICAL CENTER · 2020 · $575,925

## Abstract

The long-term goal of our research project is to define mechanisms involved in regulating the formation,
maintenance, and maturation of pre- and postsynaptic elements of the neuromuscular junction (NMJ). The
NMJ is the chemical synaptic connection between motor neuron and skeletal muscle. The NMJ is
essential for routine activities such as breathing, swallowing, and movement. We investigate the NMJ as a
model for understanding synapses because the NMJ can provide information pertinent to both peripheral
and central synapses, while its relatively simple structure and easy accessibility make it more amenable to
investigation than the central synapse.
 This project addresses a fundamental question in the interaction between the pre- and postsynaptic
elements of the NMJ – how muscle talks back to the nerve to establish and maintain normal synapses.
Using genetic approaches in mice, we found that the muscle dihydropyridine receptors – which are known
for their roles in muscle contraction – plays a crucial regulatory role in the differentiation of the motor nerve
terminals and NMJ formation. This finding was unexpected, in part because much of the information
known about the regulation of the pre-synaptic development point to a predominantly “neurocentric
paradigm.” The discovery of an important muscle-derived regulator suggests that muscle plays a much
more active role in regulating presynaptic elements than was previously believed. Our preliminary findings
open a new avenue of investigation for identifying feed back mechanisms from muscle to nerve. By
identifying these regulatory signals, we will be able to provide new targets for the development of
therapeutic strategies to treat or prevent neurodevelopmental disorders and neurodegenerative diseases.

## Key facts

- **NIH application ID:** 10012944
- **Project number:** 5R01NS055028-14
- **Recipient organization:** UT SOUTHWESTERN MEDICAL CENTER
- **Principal Investigator:** WEICHUN LIN
- **Activity code:** R01 (R01, R21, SBIR, etc.)
- **Funding institute:** NIH
- **Fiscal year:** 2020
- **Award amount:** $575,925
- **Award type:** 5
- **Project period:** 2007-05-15 → 2022-07-31

## Primary source

NIH RePORTER: https://reporter.nih.gov/project-details/10012944

## Citation

> US National Institutes of Health, RePORTER application 10012944, Patterning and Formation of the Neuromuscular Junction (5R01NS055028-14). Retrieved via AI Analytics 2026-05-22 from https://api.ai-analytics.org/grant/nih/10012944. Licensed CC0.

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