Evidence map›Paper›PMID 26289590›Full record

ArticleNeuro-oncology2016

Brain-derived neurotrophic factor genetic polymorphism (rs6265) is protective against chemotherapy-associated cognitive impairment in patients with early-stage breast cancer.

Terence Ng, Shu Mei Teo, Hui Ling Yeo, Maung Shwe, Yan Xiang Gan, Yin Ting Cheung, Koon Mian Foo, Mooi Tai Cham, Jung Ah Lee, Yee Pin Tan and 14 more

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In one paragraph

Article in Neuro-oncology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
57citing papers in PubMed, 5 pooled it
–field-weighted citation impact
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

57 citing papers in PubMed, 5 syntheses or guidelines pooled it.

  1. Pooled it
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  4. Systematic review of genetic polymorphisms associated with psychoneurological symptoms in breast cancer survivors.Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer · 2019
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  10. Cancer treatment-related cognitive impairment.Neuro-oncology advances · 2026
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4 · The record

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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

24 authors.

Terence NgDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Shu Mei TeoDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Hui Ling YeoDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Maung ShweDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Yan Xiang GanDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Yin Ting CheungDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Koon Mian FooDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Mooi Tai ChamDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Jung Ah LeeDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Yee Pin TanDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Gilbert FanDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Wei Sean YongDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Madhukumar PreethaDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Wei-Jen Kiley LohDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Si-Lin KooDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Amit JainDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Guek Eng LeeDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Mabel WongDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Rebecca DentDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Yoon Sim YapDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Raymond NgDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Chiea Chuen KhorDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Han Kiat HoDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).
Alexandre ChanDepartment of Pharmacy, National University of Singapore, Singapore (T.N., S.M.T., H.L.Y., M.S., Y.T.C., H.K.H., A.C.); Department of Pharmacy, National Cancer Centre Singapore, Singapore (Y.X.G., A.C.); Department of Pharmacy, K.K. Women's and Children's Hospital, Singapore (K.M.F.); Breast Centre, K.K. Women's and Children's Hospital, Singapore (M.T.C., J.A.L.); Department of Psychosocial Oncology, National Cancer Centre Singapore, Singapore (Y.P.T., G.F.); Department of Surgical Oncology, National Cancer Centre Singapore, Singapore (W.S.Y., M.P.); Department of Medical Oncology, National Cancer Centre Singapore, Singapore (W.-J.K.L., S.-L.K., A.J., G.E.L., M.W., R.D., Y.S.Y., R.N.); Duke-N.U.S Graduate Medical School Singapore, Singapore (R.D., R.N.); Human Genetics, Genome Institute of Singapore, Singapore (C.C.K.); Singapore Eye Research Institute, Singapore (C.C.K.).

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBrain-derived neurotrophic factor (BDNF), a neurotrophin that regulates neuronal function and development, is implicated in several neurodegenerative conditions. Preliminary data suggest that a reduction of BDNF concentrations may lead to postchemotherapy cognitive impairment. We hypothesized that a single nucleotide polymorphism (rs6265) of the BDNF gene may predispose patients to cognitive impairment. This study aimed to evaluate the effect of BDNF gene polymorphism on chemotherapy-associated cognitive impairment.

methodsOverall, 145 patients receiving chemotherapy for early-stage breast cancer (mean age: 50.8 ± 8.8 y; 82.1% Chinese) were recruited. Patients' cognitive functions were assessed longitudinally using the validated Functional Assessment of Cancer Therapy-Cognitive Function (v.3) and an objective computerized tool, Headminder. Genotyping was performed using Sanger sequencing. Logistic regression was used to evaluate the association between BDNF Val66Met polymorphism and cognition after adjusting for ethnicity and clinically important covariates.

resultsOf the 145 patients, 54 (37%) reported cognitive impairment postchemotherapy. The Met/Met genotype was associated with statistically significant lower odds of developing cognitive impairment (odds ratio [OR] = 0.26; 95% CI: 0.08-0.92; P = .036). The Met carriers were less likely to experience impairment in the domains of verbal fluency (OR = 0.34; 95% CI: 0.12-0.90; P = .031) and multitasking ability (OR = 0.37; 95% CI: 0.15-0.91; P = .030) compared with the Val/Val homozygote. No associations were observed between Headminder and the BDNF Val66Met polymorphism.

conclusionsThis is the first study to provide evidence that carriers of the BDNF Met allele are protected against chemotherapy-associated cognitive impairment. Further studies are required to validate the findings.

Indexed as

Antineoplastic Combined Chemotherapy ProtocolsBiomarkers, TumorBrain-Derived Neurotrophic FactorBreast NeoplasmsCognition DisordersFemaleFollow-Up StudiesGenetic Predisposition to DiseaseGenotypeHumansMiddle AgedNeoplasm StagingPolymorphism, Single NucleotidePrognosisProspective StudiesBDNF protein, humanBiomarkers, TumorBrain-Derived Neurotrophic FactorBDNFbreast cancercognitiongeneticsrs6265

Identifiers

PMID26289590
PMCPMC4724179

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