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Updated: Jun 13, 2025

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Rediscovering a Forgotten Link: TSPO and RIM-BP1 in Appetite Regulation.

Joshua Wang1,2, Hayley Moody3, Kate Beecher4

  • 1Department of Research, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 231, Taiwan.

Nutrition Reviews
|September 13, 2024
PubMed
Summary

The translocator protein of 18 kDa (TSPO) and RIM binding protein 1 (RIM-BP1) may interact to influence appetite. This review suggests their interaction specifically impacts odor-guided appetite, warranting further nutritional neuroscience research.

Keywords:
TSPOappetite regulationodor-guided eatingolfactionolfactory bulb

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Nutritional Science

Background:

  • Translocator protein of 18 kDa (TSPO) and RIM binding protein 1 (RIM-BP1) are highly expressed in olfactory bulb neurons.
  • Both proteins share overlapping functions and are linked to obesity development.
  • A prior yeast 2-hybrid study suggested an interaction between RIM-BP1 and a TSPO peptide fragment.

Purpose of the Study:

  • To revisit and review the literature on the interaction between TSPO and RIM-BP1.
  • To evaluate the potential physiological relevance of the TSPO-RIM-BP1 interaction.
  • To explore the role of this interaction in appetite regulation and neurological functions.

Main Methods:

  • Literature review and commentary.
  • Analysis of existing studies on TSPO and RIM-BP1.
  • Synthesis of data regarding protein interactions and neurological functions.

Main Results:

  • The interaction between the full TSPO protein and RIM-BP1 has not been experimentally confirmed.
  • Existing discourse often dismisses the interaction as physiologically irrelevant.
  • Evidence suggests the interaction plays a specific role in odor-guided appetite regulation.

Conclusions:

  • The TSPO-RIM-BP1 interaction, though often overlooked, may have significant implications for appetite control.
  • Contrary to prevailing views, the interaction is likely not irrelevant but specifically involved in olfactory-mediated feeding behaviors.
  • Further investigation into the nutritional neuroscientific consequences of TSPO/RIM-BP1 interactions is recommended.