Evidence map›Paper›PMID 20306019›Full record

ArticleOsteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA2011

Green tea polyphenols attenuate deterioration of bone microarchitecture in female rats with systemic chronic inflammation.

C-L Shen, J K Yeh, C Samathanam, J J Cao, B J Stoecker, R Y Dagda, M-C Chyu, D M Dunn, J-S Wang

Abstract read
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In one paragraph

Article in Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 10% 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

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

  1. Lipopolysaccharide-Induced Bone Loss in Rodent Models: A Systematic Review and Meta-Analysis.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2023
    Pooled it
  2. Effect of green tea and Tai Chi on bone health in postmenopausal osteopenic women: a 6-month randomized placebo-controlled trial.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2012
    Trial
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  13. Osteoprotective Roles of Green Tea Catechins.Antioxidants (Basel, Switzerland) · 2020
    Review
  14. The Effect of Inflammation on Bone.Frontiers in physiology · 2020
    Review
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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

9 authors at 6 institutions in 1 country.

C-L ShenDepartment of Pathology, Texas Tech University Health Sciences Center, BB 198, 3601 4th Street, Lubbock, TX 79430-9097, USA. leslie.shen@ttuhsc.edu
J K Yeh
C Samathanam
J J Cao
B J Stoecker
R Y Dagda
M-C Chyu
D M Dunn
J-S Wang
Texas Tech University Health Sciences Center · USTexas Tech University · USGrand Forks Human Nutrition Research Center · USOklahoma State University · USUniversity of Georgia · USWinthrop-University Hospital · US

Funding

Chemoprevention of Green Tea Polyphenol on Liver CancerR01CA090997 · NCI · UNIVERSITY OF GEORGIA · PI WANG, JIA-SHENG · 2003 to 2007
$1.8M
GTP and Tai Chi for Bone Health: a Pilot StudyR21AT003735 · NCCIH · TEXAS TECH UNIVERSITY HEALTH SCIS CENTER · PI SHEN, CHWAN-LI L · 2007 to 2008
$568k
NCCIH NIH HHS R21AT003735NCI NIH HHS CA90997
6 · The paper itself

Abstract

unlabelledGreen tea polyphenols (GTP) are promising agents for preventing bone loss. GTP supplementation sustained microarchitecture and improved bone quality via a decrease in inflammation. Findings suggest a significant role for GTP in skeletal health of patients with chronic inflammation.

introductionThis study evaluated whether GTP can restore bone microstructure along with a molecular mechanism in rats with chronic inflammation. A 2 [placebo vs. lipopolysaccharide (LPS)]× 2 [no GTP vs. 0.5% GTP (w/v) in drinking water] factorial design was employed.

methodsFemale rats were assigned to four groups: placebo, LPS, placebo + GTP, and LPS + GTP for 12 weeks. Efficacy was evaluated by examining changes in bone microarchitecture using histomorphometric and microcomputed tomographic analyses and by bone strength using the three-point bending test. A possible mechanism was studied by assessing the difference in tumor necrosis factor-α (TNF-α) expression in tibia using immunohistochemistry.

resultsLPS lowered trabecular volume fraction, thickness, and bone formation in proximal tibia while increasing osteoclast number and surface perimeter in proximal tibia and eroded surface in endocortical tibial shafts. GTP increased trabecular volume fraction and number in both femur and tibia and periosteal bone formation rate in tibial shafts while decreasing trabecular separation in proximal tibia and eroded surface in endocortical tibial shafts. There was an interaction between LPS and GTP in trabecular number, separation, bone formation, and osteoclast number in proximal tibia, and trabecular thickness and number in femur. GTP improved the strength of femur, while suppressing TNF-α expression in tibia.

conclusionIn conclusion, GTP supplementation mitigated deterioration of bone microarchitecture and improved bone integrity in rats with chronic inflammation by suppressing bone erosion and modulating cancellous and endocortical bone compartments, resulting in a larger net bone volume. Such a protective role of GTP may be due to a suppression of TNF-α.

Indexed as

Dietary SupplementsAnimalsBody WeightBone Diseases, MetabolicChronic DiseaseDisease Models, AnimalDrug Evaluation, PreclinicalFemaleFemurFlavonoidsInflammationLipopolysaccharidesOsteoclastsPhenolsPolyphenolsRatsFlavonoidsLipopolysaccharidesPhenolsPolyphenolsTeaTumor Necrosis Factor-alpha

Identifiers

PMID20306019
OpenAlexW1987479197

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.