Evidence map›Paper›PMID 22234464›Full record

ArticleEndocrinology2012

Lipocalin 2 deficiency alters estradiol production and estrogen receptor signaling in female mice.

Hong Guo, Yuanyuan Zhang, David A Brockman, Wendy Hahn, David A Bernlohr, Xiaoli Chen

Open access · bronzeAbstract read
In one paragraph

Article in Endocrinology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 1 pooled it
4.9field-weighted citation impact, top 5% 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

30 citing papers in PubMed, 1 synthesis or guideline pooled it, 59 citations in OpenAlex.

  1. Pooled it
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  19. Regulation of Energy Metabolism by Bone-Derived Hormones.Cold Spring Harbor perspectives in medicine · 2018
    Review
  20. Changes in cardiac NaMolecular and cellular biochemistry · 2017
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Hong GuoDepartment of Food Science and Nutrition, University of Minnesota-Twin Cities, St. Paul, Minnesota 55108-1038, USA.
Yuanyuan Zhang
David A Brockman
Wendy Hahn
David A Bernlohr
Xiaoli Chen
University of Minnesota · US

Funding

Obesity and Energy Metabolism CoreP30DK050456 · NIDDK · UNIVERSITY OF MINNESOTA TWIN CITIES · PI BERNLOHR, DAVID A · 1995 to 2015
$17.0M
Lipocalin 2 in Inflammation and Metabolic ControlR01DK080743 · NIDDK · UNIVERSITY OF MINNESOTA · PI CHEN, XIAOLI · 2008 to 2012
$1.5M
NIDDK NIH HHS P30 DK050456NIDDK NIH HHS R01 DK080743NIDDK NIH HHS R01DK080743
6 · The paper itself

Abstract

We have previously characterized lipocalin 2 (Lcn2) as a new adipokine having a critical role in energy and lipid metabolism in male mice. Previous studies by others have suggested that Lcn2 is a putative target gene of estrogens. In this study, we reported the effect of Lcn2 deficiency on estradiol biosynthesis and estrogen receptor signaling in female Lcn2-deficient (Lcn2-/-) mice. We found that Lcn2 expression in white adipose tissue is gender, depot, and age dependent. In female mice, Lcn2 is predominantly expressed in inguinal adipose tissue but at relatively very low levels in perigonadal depot and ovary. After 22 wk of high-fat diet (HFD) feeding or at old age, Lcn2-/- female mice had significantly reduced levels of serum 17β-estradiol and down-regulated expression of estrogen receptor α in multiple metabolic tissues. Consistently, the expression of estrogen-regulated genes involved in cholesterol homeostasis, such as liver X receptor β and low-density lipoprotein receptor was also down-regulated in the adipose tissue of Lcn2-/- mice. These changes were in line with the development of atherogenic dyslipidemia in response to HFD feeding; female Lcn2-/- mice had significantly elevated levels of total cholesterol and low-density lipoprotein cholesterol, whereas reduced high-density lipoprotein cholesterol levels compared with wild-type female mice. Interestingly, when compared with wild-type controls, HFD-fed female Lcn2-/- mice had significantly reduced expression levels of aromatase, a key enzyme regulating estradiol biosynthesis, in adipose tissue. Moreover, Lcn2 deficiency markedly blunted age-related increase in adipose aromatase expression but had no significant impact on age-related reduction in ovarian aromatase expression. Our findings suggest that Lcn2 has a tissue-specific role in adipose estradiol biosynthesis, which may link Lcn2 to obesity- and age-related estradiol production and metabolic complications in females.

Indexed as

Gene Expression RegulationAcute-Phase ProteinsAdipose TissueAnimalsDiet, High-FatDown-RegulationEstradiolFemaleLipocalin-2LipocalinsLiver X ReceptorsMaleMiceMice, TransgenicObesityOncogene ProteinsAcute-Phase ProteinsEstradiolLcn2 protein, mouseLipocalin-2LipocalinsLiver X ReceptorsOncogene ProteinsOrphan Nuclear ReceptorsReceptors, EstrogenReceptors, LDLTriglycerides

Identifiers

PMID22234464
PMCPMC3281525
OpenAlexW2127368998

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.