| Description | Doxycycline hydrochloride (Hyclate) is a synthetic tetracycline derivative with similar antimicrobial activity. |
| In vitro | 在Wistar大鼠中,每天 Doxycycline（25 mg）能够阻断主动脉弹性蛋白的结构性恶化,降低动脉壁中基质金属蛋白酶MMP-2和MMP-9的活性,从而减少平滑肌细胞在内膜的复制. |
| In vivo | 在类风湿滑膜成纤维细胞和内皮细胞中,Doxycycline（50 μM）下调MMP-8的在mRNA和蛋白水平的表达,同时完全抑制II型胶原的降解。在角膜上皮细胞中,Doxycycline抑制脂多糖诱导的IL-1β的mRNA和蛋白的量的增加。 |
| Cell experiments | Doxycycline is diluted in culture medium at a concentration of 10 μg/mL. All in vitro treatments are performed in SMC cultures at 90% confluence, when ECM synthesis in SMC starts to be evident. Doxycycline (20 nM) is diluted in culture medium at a concentration of 10 μg/mL (20 nM), at which no toxicity or variation in primary cultured SMC proliferation has been reported, as well as in other cell lines and the incubation time is 48 h. SMC-C and SMC-Ch are seeded at equal cell density in 6-well plates and, when confluence reaches 90%, 1 mL culture medium is added to each well containing 3.7×104?Bq L-[5-H3]-proline (9.62×1011 Bq/mmol). After 48?h incubation, cells are lysed with 0.5 mL 0.5 mol/L NaOH for 1 h. The resulting solution is neutralized with an equal amount of 0.5 mol/L HCl, and 50 μL are used to measure total proteins with the Bradford method. One volume of 10% TCA is added to the remaining 250 μL and centrifuged at 13,000 g for 15?min at 4°C. The resulting precipitate is dissolved in 100 μL 0.2 mol/L NaOH, and then neutralized with 1 mol/L HCl. The solution is incubated with collagenase buffer (Tris-HCl, pH 7.6 20 mM, and CaCl2 250 mM final concentration) and 10 units of collagenase at 37°C overnight. Then, 150 μL 10% TCA are added and centrifuged at 13000 g for 15?min at 4°C. The resulting supernatant is added to 4 mL of scintillation fluid and the radioactivity is measured in a liquid scintillation counter LS 600 TA. |
| Synonyms | Doxylin, 盐酸多西环素, Vibramycin, Hyclate |
| molecular weight | 480.9 |
| Molecular formula | C22H24N2O8·HCl |
| CAS | 10592-13-9 |
| Storage | keep away from moisture | Powder: -20°C for 3 years | In solvent: -80°C for 1 year |
| Solubility | DMSO: 10 mM |
| References | 1. Wilfried Briest, et al. Doxycycline ameliorates the susceptibility to aortic lesions in a mouse model for the vascular type of Ehlers-Danlos syndrome. J Pharmacol Exp Ther. 2011 Jun;337(3):621-7. 2. Zhang N, et al. The PK/PD Interactions of Doxycycline against Mycoplasma gallisepticum. Front Microbiol. 2016 May 4;7:653. 3. Trajano VC, et al. Osteogenic activity of cyclodextrin-encapsulated doxycycline in a calcium phosphate PCL and PLGA composite. Mater Sci Eng C Mater Biol Appl. 2016 Jul 1;64:370-5. 4. Palomino-Morales R, et al. Inhibition of extracellular matrix production and remodeling by doxycycline in smooth muscle cells. J Pharmacol Sci. 2016 Mar 25. Epub ahead of print 5. Shu W J, Chen R, Yin Z H, et al. Rph1 coordinates transcription of ribosomal protein genes and ribosomal RNAs to control cell growth under nutrient stress conditions. Nucleic Acids Research. 2020, 48(15): 8360-8373. |
| Citations | 1. Shu W J, Chen R, Yin Z H, et al. Rph1 coordinates transcription of ribosomal protein genes and ribosomal RNAs to control cell growth under nutrient stress conditions. Nucleic Acids Research. 2020, 48(15): 8360-8373 |