Evidence map›Paper›PMID 24550067›Full record

ArticleObesity (Silver Spring, Md.)2014

Spexin is a novel human peptide that reduces adipocyte uptake of long chain fatty acids and causes weight loss in rodents with diet-induced obesity.

José L Walewski, Fengxia Ge, Harrison Lobdell, Nancy Levin, Gary J Schwartz, Joseph R Vasselli, Afons Pomp, Gregory Dakin, Paul D Berk

Open access · greenAbstract read
In one paragraph

Article in Obesity (Silver Spring, Md.), 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 88 papers.

0numbers the graph read from it
0cells of the map it votes in
88citing papers in PubMed
2.6field-weighted citation impact, top 11% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

88 citing papers in PubMed, 187 citations in OpenAlex.

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  7. Emerging roles of spexin in cardiovascular homeostasis.Frontiers in cardiovascular medicine · 2026
    Review
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  20. Adiponectin Resistance in Obesity: Adiponectin Leptin/Insulin Interaction.Advances in experimental medicine and biology · 2024
    Review

28 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 4 institutions in 1 country.

José L WalewskiDepartment of Medicine, Columbia University Medical Center, New York, New York, 10032, USA.
Fengxia Ge
Harrison Lobdell
Nancy Levin
Gary J Schwartz
Joseph R Vasselli
Afons Pomp
Gregory Dakin
Paul D Berk
Columbia University Irving Medical Center · USCornell University · USAlbert Einstein College of Medicine · USSt. Luke's Hospital · US

Funding

RESEARCH TRAININGP30DK026687 · NIDDK · ST. LUKE'S-ROOSEVELT INST FOR HLTH SCIS · PI Anthony W Ferrante, DYMPNA GALLAGHER · 1986 to 2026
$33.0M
Bariatric Surgery: Outcomes & Impact on PathophysiologyU01DK066667 · NIDDK · MOUNT SINAI SCHOOL OF MEDICINE OF NYU · PI BERK, PAUL DAVID, POMP, ALFONS · 2003 to 2015
$4.7M
FACILITATED UPTAKE OF LONG CHAIN FATTY ACIDS IN OBESITYR01DK052401 · NIDDK · MOUNT SINAI SCHOOL OF MEDICINE OF NYU · PI BERK, PAUL DAVID · 1998 to 2008
$2.6M
Bariatric Surgery for Morbid Obesity: Clinical and Pathophysiologic ConsequencesR01DK072526 · NIDDK · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI BERK, PAUL DAVID · 2006 to 2010
$1.8M
NIDDK NIH HHS DK072526-04ES1NIDDK NIH HHS DK-26687NIDDK NIH HHS DK-72526NIDDK NIH HHS P30 DK026687NIDDK NIH HHS R01 DK052401NIDDK NIH HHS R01 DK072526NIDDK NIH HHS R01-DK-52401NIDDK NIH HHS U01 DK066667NIDDK NIH HHS U01-DK-66667
6 · The paper itself

Abstract

objectiveMicroarray studies identified Ch12:orf39 (Spexin) as the most down-regulated gene in obese human fat. Therefore, we examined its role in obesity pathogenesis.

methodsSpexin effects on food intake, meal patterns, body weight, respiratory exchange ratio (RER), and locomotor activity were monitored electronically in C57BL/6J mice or Wistar rats with diet-induced obesity (DIO). Its effects on adipocyte [(3)H]-oleate uptake were determined.

resultsIn humans, Spexin gene expression was down-regulated 14.9-fold in obese omental and subcutaneous fat. Circulating Spexin changed in parallel, correlating (r = -0.797) with Leptin. In rats, Spexin (35 µg/kg/day SC) reduced caloric intake ∼32% with corresponding weight loss. Meal patterns were unaffected. In mice, Spexin (25 µg/kg/day IP) significantly reduced the RER at night, and increased locomotion. Spexin incubation in vitro significantly inhibited facilitated fatty acid (FA) uptake into DIO mouse adipocytes. Conditioned taste aversion testing (70 µg/kg/day IP) demonstrated no aversive Spexin effects.

conclusionsSpexin gene expression is markedly down-regulated in obese human fat. The peptide produces weight loss in DIO rodents. Its effects on appetite and energy regulation are presumably central; those on adipocyte FA uptake appear direct and peripheral. Spexin is a novel hormone involved in weight regulation, with potential for obesity therapy.

Indexed as

AdipocytesAnimalsBody WeightDown-RegulationEatingEnergy IntakeFatty AcidsFeeding BehaviorHumansLeptinMaleMiceMice, Inbred C57BLMice, ObeseObesityOleic AcidFatty AcidsLeptinOleic AcidPeptide HormonesSPX protein, rat

Identifiers

PMID24550067
PMCPMC4077920
OpenAlexW1913890968

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.