Evidence map›Paper›PMID 12114192›Full record

ArticleAmerican journal of physiology. Lung cellular and molecular physiology2002

Maternal loading with very low-density lipoproteins stimulates fetal surfactant synthesis.

Alan J Ryan, Jheem D Medh, Diann M McCoy, Ronald G Salome, Rama K Mallampalli

Open access · greenAbstract read
In one paragraph

Article in American journal of physiology. Lung cellular and molecular physiology, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
0.7field-weighted citation impact, top 28% 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

14 citing papers in PubMed, 29 citations in OpenAlex.

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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

5 authors at 1 institution in 1 country.

Alan J RyanDepartment of Internal Medicine and the Department of Veterans Affairs Medical Center, The University of Iowa College of Medicine, Iowa City, Iowa 52242, USA.
Jheem D Medh
Diann M McCoy
Ronald G Salome
Rama K Mallampalli
University of Iowa · US

Funding

TNFalpha-Lipoprotein Control of a Surfactant EnzymeR01HL068135 · NHLBI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI MALLAMPALLI, RAMA K · 2001 to 2010
$2.7M
Transcriptional Regulation of a Surfactant EnzymeR01HL071040 · NHLBI · UNIVERSITY OF IOWA · PI MALLAMPALLI, RAMA K · 2002 to 2005
$1.5M
Regulation of Cytidylytransferase in Fetal Rat LungR01HL055584 · NHLBI · UNIVERSITY OF IOWA · PI MALLAMPALLI, RAMA K · 1998 to 2005
$1.2M
REGULATION OF CYTIDYLYLTRANSFERASE IN FETAL RAT LUNGR29HL055584 · NHLBI · UNIVERSITY OF IOWA · PI MALLAMPALLI, RAMA K · 1996 to 1997
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NHLBI NIH HHS HL-55584NHLBI NIH HHS HL-68135NHLBI NIH HHS HL-71040NHLBI NIH HHS R01 HL055584NHLBI NIH HHS R01 HL068135NHLBI NIH HHS R01 HL071040
6 · The paper itself

Abstract

We examined whether administration of very low-density lipoproteins (VLDL) to pregnant rats increases surfactant phosphatidylcholine (PtdCho) content in fetal pre-type II alveolar epithelial cells. VLDL-triglycerides are hydrolyzed to fatty acids by lipoprotein lipase (LPL), an enzyme activated by heparin. Fatty acids released by LPL can incorporate into the PtdCho molecule or activate the key biosynthetic enzyme cytidylyltransferase (CCT). Dams were given BSA, heparin, VLDL, or VLDL with heparin intravenously. Radiolabeled VLDL given to the pregnant rat crossed the placenta and was distributed systemically in the fetus and incorporated into disaturated PtdCho (DSPtdCho) in pre-type II cells. Maternal administration of VLDL with heparin increased DSPtdCho content in cells by 45% compared with control (P < 0.05). VLDL produced a dose-dependent, saturable, and selective increase in CCT activity. VLDL did not significantly alter immunoreactive CCT content but increased palmitic, stearic, and oleic acids in pre-type II cells. Furthermore, hypertriglyceridemic apolipoprotein E knockout mice contained significantly greater levels of DSPtdCho content in alveolar lavage and CCT activity compared with either LDL receptor knockout mice or wild-type controls that have normal serum triglycerides. Thus the nutritional or genetic modulation of serum VLDL-triglycerides provides specific fatty acids that stimulate PtdCho synthesis and CCT activity thereby increasing surfactant content.

Indexed as

AnimalsApolipoproteins ECholine-Phosphate CytidylyltransferaseFatty AcidsFemaleFetusImmunoblottingInjections, IntravenousLipoproteins, VLDLLungMiceMice, KnockoutPhosphatidylcholinesPregnancyPregnancy, AnimalPulmonary SurfactantsApolipoproteins ECholine-Phosphate CytidylyltransferaseFatty Acidslecithins, disaturatedLipoproteins, VLDLPhosphatidylcholinesPulmonary SurfactantsReceptors, LDL

Identifiers

PMID12114192
PMCPMC2768472
OpenAlexW2163089643

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.