| CAS NO: | 36861-47-9 |
| 包装 | 价格(元) |
| 10mM (in 1mL DMSO) | 电议 |
| 1g | 电议 |
| 5g | 电议 |
| 10g | 电议 |
| Storage | Store at -20°C |
| M.Wt | 254.4 |
| Cas No. | 36861-47-9 |
| Formula | C18H22O |
| Synonyms | Enzacamene|Eusolex 6300|4-MBC|Neo Heliopan MBC|Parsol 500|Uvinul MBC 95 |
| Solubility | insoluble in H2O; ≥10 mg/mL in DMSO; ≥111.2 mg/mL in EtOH |
| Chemical Name | 1,7,7-trimethyl-3-[(4-methylphenyl)methylene]-bicyclo[2.2.1]heptan-2-one |
| Canonical SMILES | CC1=CC=C(/C=C2[C@H]3CC[C@@](C)(C3(C)C)C/2=O)C=C1 |
| 运输条件 | 蓝冰运输或根据您的需求运输。 |
| 一般建议 | 为了使其更好的溶解，请用37℃加热试管并在超声波水浴中震动片刻。不同厂家不同批次半岛bd体育手机客户端 溶解度各有差异，仅做参考。若实验所需浓度过大至半岛bd体育手机客户端 溶解极限，请添加助溶剂助溶或自行调整浓度。溶液形式一般不宜长期储存，请尽快用完。 |
4-Methylbenzylidene camphor (4-MBC) is an ultraviolet light blocker used in cosmetics and sunscreen preparations that also has estrogenic activities.
Since the estrogen receptor (ER) ligand type can influence transactivation, it is important to obtain information on molecular actions of nonclassical ER agonists.
In vitro: Previous results of competitive binding assays using cytosolic protein preparations from Xenopus hepatocytes demonstrated that 4-MBC could weakly bind to the ER. In addition, 4-MBC at a 100 micromol/L was not able to replace estradiol from the receptor completely [1].
In vivo: The estrogen target gene expression in uterus of Long Evans rats after exposure to 4-MBC was studied. Results showed that 4-MBC could altere steady-state levels of mRNAs encoding for ER, progesterone receptor (PR), and androgen recepto in uterus of 12-wk-old offspring. To evaluate sensitivity to estradiol (E2), offspring were injected with E2, and killed 6 h later. Acute up-regulation of PR and IGF-I and down-regulation of ER and androgen receptor by E2 were reduced in 4-MBC treated rats dose-dependently [2].
Clinical trial: In a 2-week single-blinded study, 15 young males and 17 postmenopausal females, were assigned to daily whole-body topical application of 2 mg per cm2 of 4-MBC basic cream formulation. Maximum plasma concentrations were 20 ng/mL for both females and men. 4-MBC was detectable in urine. The reproductive hormones FSH, LH were unchanged but minor differences in testosterone levels were observed between the 2 wk [3].
References:
[1] Klann A, Levy G, Lutz I, Müller C, Kloas W, Hildebrandt JP. Estrogen-like effects of ultraviolet screen 3-(4-methylbenzylidene)-camphor (Eusolex 6300) on cell proliferation and gene induction in mammalian and amphibian cells. Environ Res. 2005 Mar;97(3):274-81.
[2] S. Durrer, K. Maerkel, M. Schlumpf, et al. Estrogen target gene regulation and coactivator expression in rat uterus after developmental exposure to the ultraviolet filter 4-methylbenzylidene camphor. Endocrinology 146(5), 2130-2139 (2005).
[3] N. R. Janjua, B. Mogensen, A. M. Andersson, et al. Systemic absorption of the sunscreens benzophenone-3, octyl-methoxycinnamate, and 3-(4-methyl-benzylidene) camphor after whole-body topical application and reproductive hormone levels in humans. Journal of Investigative Dermatology 123, 57-61(2004).
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