Evidence map›Paper›PMID 31357197›Full record

ArticleObesity facts2019

Leptin Is Not Essential for Obesity-Associated Hypertension.

Julia von Schnurbein, Jaida Manzoor, Stephanie Brandt, Friederike Denzer, Katja Kohlsdorf, Pamela Fischer-Posovszky, Mario Weißenberger, Sabine Frank-Podlech, Saqib Mahmood, Martin Wabitsch

Open access · goldAbstract read
In one paragraph

Article in Obesity facts, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 2 pooled it
1.7field-weighted citation impact, top 17% 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

12 citing papers in PubMed, 2 syntheses or guidelines pooled it, 25 citations in OpenAlex.

  1. Classification of Congenital Leptin Deficiency.The Journal of clinical endocrinology and metabolism · 2024
    Pooled it
  2. Pooled it
  3. Trial
  4. Review
  5. Article
  6. Article
  7. Article
  8. Review
  9. Leptin signaling and leptin resistance.Medical review (2021) · 2022
    Review
  10. Review
  11. Leptin in Leanness and Obesity: JACC State-of-the-Art Review.Journal of the American College of Cardiology · 2021
    Review
  12. Review
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

10 authors at 3 institutions in 2 countries.

Julia von SchnurbeinDivision of Pediatric Endocrinology and Diabetes, Ulm University Hospital, Ulm, Germany, julia.schnurbein@uniklinik-ulm.de.
Jaida ManzoorThe Children's Hospital and Institute of Child Health, Lahore, Pakistan.
Stephanie BrandtDivision of Pediatric Endocrinology and Diabetes, Ulm University Hospital, Ulm, Germany.
Friederike DenzerDivision of Pediatric Endocrinology and Diabetes, Ulm University Hospital, Ulm, Germany.
Katja KohlsdorfDivision of Pediatric Endocrinology and Diabetes, Ulm University Hospital, Ulm, Germany.
Pamela Fischer-PosovszkyDivision of Pediatric Endocrinology and Diabetes, Ulm University Hospital, Ulm, Germany.
Mario WeißenbergerDivision of Pediatric Endocrinology and Diabetes, Ulm University Hospital, Ulm, Germany.
Sabine Frank-PodlechInstitute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Tübingen, Germany.
Saqib MahmoodDepartment of Human Genetics and Molecular Biology, University of Health Sciences Lahore, Lahore, Pakistan.
Martin WabitschDivision of Pediatric Endocrinology and Diabetes, Ulm University Hospital, Ulm, Germany.
University Hospital Ulm · DEHeinrich Heine University Düsseldorf · DEUniversity of Health Sciences Lahore · PK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND AND

objectiveHyperleptinemia is supposed to play a causal role in the development of obesity-associated hypertension, possibly via increased sympathetic tone. Hence patients with congenital leptin deficiency should be hypotensive and their low blood pressure should increase under leptin substitution. SUBJECTS AND

methodsTo test this assumption, we examined ambulatory blood pressure, resting heart rate, Schellong test results, cold pressor test results, heart rate variability, catecholamine metabolites, and aldosterone levels in 6 patients with congenital leptin deficiency before as well as 2-7 days and 7-14 months after the start of leptin substitution. Ambulatory blood pressure was also examined in 3 patients with biallelic disease-causing variants in the leptin receptor gene.

resultsContrary to our expectations, even before leptin substitution, 1 patient with biallelic leptin receptor gene variants and 4 patients with leptin deficiency had been suffering from hypertension. Short-term substitution with leptin increased blood pressure further in 3 out of 4 patients (from 127.0 ± 11.7 to 133.8 ± 10.6 mm Hg), concomitant with an increase in resting heart rate as well as in heart rate during the Schellong test in all patients (from 87.6 ± 7.7 to 99.9 ± 11.0 bpm, p = 0.031, and from 102.9 ± 13.5 to 115.6 ± 11.3 bpm, p = 0.031, respectively). Furthermore, the systolic blood pressure response during the cold pressor test increased in 4 out of 6 patients. Unexpectedly, catecholamine metabolites and aldosterone levels did not increase. After long-term leptin substitution and weight loss, the resting heart rate decreased in 4 out of 6 patients compared to baseline, and in all patients below the heart rate seen immediately after the start of therapy (from 99.9 ± 11.0 to 81.7 ± 5.4 bpm; p = 0.031).

conclusionsThese results show that obesity-associated hypertension does not depend on the presence of leptin. However, short-term leptin substitution can increase the blood pressure and heart rate in obese humans with leptin deficiency, indicating that leptin plays at least an additive role in obesity-associated hypertension. The mechanisms behind this are not clear but might include an increase in regional sympathetic tone.

Indexed as

AdolescentAdultBlood PressureBlood Pressure Monitoring, AmbulatoryChildCohort StudiesFemaleHeart RateHormone Replacement TherapyHumansHypertensionLeptinMaleMetabolism, Inborn ErrorsObesityReceptors, LeptinLEPR protein, humanLeptinmetreleptinReceptors, LeptinGeneticsHypertensionLeptinMetabolismMutationObesity

Identifiers

PMID31357197
PMCPMC6758712
OpenAlexW2964504637

What OpenQuestion holds

Textmetadata
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.