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Effects of toremifene (TOR) and tamoxifen (TAM) on serum lipids

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Abstract

This study clarified the difference in the effects on serum lipids between toremifene (TOR) and tamoxifen (TAM). To remove influencing factors, we investigated adjuvant therapy for hormone receptor-positive patients with breast cancer without lymph node metastasis. The subjects were 65 patients who were enrolled in a multicenter randomized comparative study between April 1997 and March 2001. As adjuvant therapy, 20 mg of TAM or 40 mg of TOR was administered for 1 year. The levels of triglyceride (TG), total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), apolipoprotein A-1 (Apo A-1), apolipoprotein A(Apo B), and lipoprotein a (Lp(a)) were measured prior to administration and 3, 6, and 12 months after the start of administration. TC, LDL-C, Lp(a) and Apo B significantly decreased from the third month of administration compared with values before the start of administration in both the TOR and TAM groups. HDL-C significantly increased from the third month only in the TOR group. TG significantly increased in the TAM group but significantly decreased in the TOR group in the 12th month of administration. When these two groups were compared, HDL-C was significantly higher ( p < 0.01) and TG was significantly lower ( p < 0.01) in the TOR group in the 12th month. Improvement of abnormal values of TG, HDL-C and LDL-C was better in the TOR group than in the TAM group after administration for 12 months. The effect on lipid metabolism showed different profiles between the two selective estrogen receptor modulators (SERMs), and TOR gave better results than TAM.

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Authors and Affiliations

  1. Third Department of Surgery, Tokyo Medical University, 2-25-9 Nishi-shinjuku, Japan

    M. Kusama

  2. Miyauchi Clinic, Japan

    K. Miyauchi

  3. Nagoya National Hospital, Japan

    H. Aoyama

  4. Niigata Cancer Center, Japan

    M. Sano

  5. Gunma Cancer Center, Japan

    M. Kimura

  6. Kitakyusyu Municipal Medical Center, Japan

    S. Mitsuyama

  7. School of Medicine, University of Tokushima, Japan

    K. Komaki

  8. Okayama University Medical School, Japan

    H. Doihara

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  1. M. Kusama
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  2. K. Miyauchi
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  3. H. Aoyama
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  4. M. Sano
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Kusama, M., Miyauchi, K., Aoyama, H. et al. Effects of toremifene (TOR) and tamoxifen (TAM) on serum lipids. Breast Cancer Res Treat 88, 1–8 (2004). https://doi.org/10.1007/s10549-004-4384-z

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  • DOI: https://doi.org/10.1007/s10549-004-4384-z

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