Evidence map›Paper›PMID 26926340›Full record

ArticleBMC cancer2016

More expression of BDNF associates with lung squamous cell carcinoma and is critical to the proliferation and invasion of lung cancer cells.

Si-Yang Zhang, Lin-Ping Hui, Chun-Yan Li, Jian Gao, Ze-Shi Cui, Xue-Shan Qiu

Open access · goldAbstract read
In one paragraph

Article in BMC cancer, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
2.0field-weighted citation impact, top 15% 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

25 citing papers in PubMed, 34 citations in OpenAlex.

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  16. Effect of BDNF on airway inflammation in a rat model of COPD.Experimental and therapeutic medicine · 2021
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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

6 authors at 1 institution in 1 country.

Si-Yang ZhangCenter of Laboratory Technology and Experimental Medicine, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, People's Republic of China. neko200321063@126.com.
Lin-Ping HuiLaboratory Center, the Fourth Affiliated Hospital of China Medical University, No.4 Chongshan East Road, Huanggu District, Shenyang, Liaoning, People's Republic of China. 46236572@qq.com.
Chun-Yan LiCenter of Laboratory Technology and Experimental Medicine, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, People's Republic of China. 1753027976@qq.com.
Jian GaoCenter of Laboratory Technology and Experimental Medicine, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, People's Republic of China. cmulab@qq.com.
Ze-Shi CuiCenter of Laboratory Technology and Experimental Medicine, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, People's Republic of China. labczs@mail.cmu.edu.cn.
Xue-Shan QiuDepartment of Pathology, the First Affiliated Hospital of China Medical University, No.155 Nanjing North Street, Heping District, Shenyang, Liaoning, People's Republic of China. qiuxues@hotmail.com.
China Medical University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBrain-derived neurotrophic factor (BDNF) has been reported to promote tumorigenesis and progression in several human malignancies. The purpose of this study was to explore the function of BDNF in lung squamous cell carcinoma (SCC) and adenocarcinoma (ADC).

methodsThe expression of BDNF was examined in 110 samples of lung SCC and ADC by immunohistochemistry. The protein level of BDNF was examined in 25 lung SCC or ADC samples and paired non-tumors by western blot. BDNF expression was also evaluated in human bronchial epithelial cells (HBE) and 4 lung cancer cell lines using western blot. Three BDNF mRNA variants containing exons IV, VI and IX were evaluated in HBE, two SCC (SK, LK2) and two ADC (A549, LTE) cell lines by RT-PCR. The expression and secretion of BDNF were also determined in cells using western blot and ELISA. Then the shRNA specific for BDNF was transfected into LK2 or A549 cells to further elucidate the BDNF knockdown on cell proliferation, apoptosis and invasion, which were confirmed by MTT, flow cytometry and transwell examinations.

results71.8 % (79 out of 110) of lung SCC and ADC samples were detected positive BDNF, and high expression of BDNF was significantly correlated with histological type and T stage. Compared with non-tumorous counterparts, BDNF was apparently overexpressed in SCC and ADC tissues. In cell studies, the extensive expression and secretion of BDNF were demonstrated in lung cancer cells compared with HBE cells. Interestingly, the expressions of BDNF mRNA variant IV and VI were identical in all cells examined. However, more expression of BDNF mRNA variant IX was found in SK and LK2 cells. The apoptotic cells were increased, and the cell proliferation and invasion were both attenuated once the expression of BDNF was inhibited. When retreated by rhBDNF, BDNF knockdown cells showed less apoptotic or more proliferative and invasive.

conclusionsOur data show that BDNF probably facilitates the tumorigenesis of lung SCC and ADC. The expression of BDNF mRNA variant IX is probably more helpful to the upregulation of BDNF in SCC, and intervening the production of BDNF could be a possible strategy to lung cancer therapy.

Indexed as

AdenocarcinomaApoptosisBrain-Derived Neurotrophic FactorCarcinoma, Squamous CellCell Line, TumorCell ProliferationGene ExpressionGene Expression Regulation, NeoplasticGene Knockdown TechniquesHumansImmunohistochemistryLung NeoplasmsNeoplasm GradingNeoplasm MetastasisNeoplasm StagingRNA, MessengerBrain-Derived Neurotrophic FactorRNA, MessengerRNA, Small Interfering

Identifiers

PMID26926340
PMCPMC4772289
OpenAlexW2291908392

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.