Abstract
SHetA2 is a novel anticancer drug with poor aqueous solubility. In formal toxicological studies, Kolliphor HS 15 was used as a solubilizing agent to increase the oral bioavailability of SHetA2. The purpose of this study was to formulate SHetA2 and Kolliphor HS 15 as solid powders to facilitate their filling in hard gelatin capsules for clinical trials. Two manufacturing processes, ultra-rapid freeze-drying (URFD) and spray freeze drying (SFD), were employed to fabricate solid powders of SHetA2-Kolliphor HS 15 and trehalose. The morphology, size, flowability, and compressibility of URFD-SHetA2 and SFD-SHetA2 powders were characterized. The crystallinity and apparent maximum solubility of SHetA2 in both powders were also determined. SFD-SHetA2 powders were spherical in shape, small, and with a wide size distribution while the URFD-SHetA2 powders were irregularly shaped and big but with a narrower distribution. DSC and XRD analyses indicated that SHetA2 was mostly amorphous in both powders. The flow of both powders was categorized as “good” (angle of repose < 35°). The uniformity of drug content in URFD-SHetA2 powders was more variable than that in SFD-SHetA2 powders. The solubility profile of SHetA2 in both powders SGF exhibited a transient supersaturation “spring effect” due to the drug’s amorphousness followed by extended supersaturation “parachute effect” at approximately 6 μg/ml for both powders compared to 0.02 ± 0.01 μg/ml for unprocessed drug. In conclusion, both URFD and SFD formed solid SHetA2 Kolliphor powders that are possible formulation candidates to be filled in hard gelatin capsules for clinical trials.
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References
Benbrook DM, Guruswamy S, Wang Y, Sun Z, Mohammed A, Zhang Y, et al. Chemoprevention of colon and small intestinal tumorigenesis in APC(min/+) mice by SHetA2 (NSC721689) without toxicity. Cancer Prev Res (Phila). 2013;6(9):908–16.
Kawabata Y, Wada K, Nakatani M, Yamada S, Onoue S. Formulation design for poorly water-soluble drugs based on biopharmaceutics classification system: basic approaches and practical applications. Int J Pharm. 2011;420(1):1–10.
Savjani KT, Gajjar AK, Savjani JK. Drug solubility: importance and enhancement techniques. ISRN Pharm. 2012;2012:195727.
Benbrook DM, Kamelle SA, Guruswamy SB, Lightfoot SA, Rutledge TL, Gould NS, et al. Flexible heteroarotinoids (Flex-Hets) exhibit improved therapeutic ratios as anti-cancer agents over retinoic acid receptor agonists. Investig New Drugs. 2005;23(5):417–28.
Liu S, Brown CW, Berlin KD, Dhar A, Guruswamy S, Brown D, et al. Synthesis of flexible sulfur-containing heteroarotinoids that induce apoptosis and reactive oxygen species with discrimination between malignant and benign cells. J Med Chem. 2004;47(4):999–1007.
Liu T, Masamha CP, Chengedza S, Berlin KD, Lightfoot S, He F, et al. Development of flexible-heteroarotinoids for kidney cancer. Mol Cancer Ther. 2009;8(5):1227–38.
Liu T-Z, Hannafon B, Gill L, Kelly B, Benbrook DM. Flex-Hets differentially induce apoptosis in cancer over normal cells by directly targeting mitochondria. Mol Cancer Ther. 2007;6:1814–22.
Guruswamy S, Lightfoot S, Gold MA, Hassan R, Berlin KD, Ivey RT, et al. Effects of retinoids on cancerous phenotype and apoptosis in organotypic cultures of ovarian carcinoma. J Natl Cancer Inst. 2001;93(7):516–25.
Kabirov KK, Kapetanovic IM, Benbrook DM, Dinger N, Mankovskaya I, Zakharov A, et al. Oral toxicity and pharmacokinetic studies of SHetA2, a new chemopreventive agent, in rats and dogs. Drug Chem Toxicol. 2013;36(3):284–95.
PHARMA B. Excipients for Drug Formulation. BASF; 2018 [cited 2018 03/01/2018]; Available from: https://pharmaceutical.basf.com/en/Drug-Formulation/Kolliphor-HS-15.html.
Cheow WS, Ng ML, Kho K, Hadinoto K. Spray-freeze-drying production of thermally sensitive polymeric nanoparticle aggregates for inhaled drug delivery: effect of freeze-drying adjuvants. Int J Pharm. 2011;404(1–2):289–300.
Overhoff KA, Engstrom JD, Chen B, Scherzer BD, Milner TE, Johnston KP, et al. Novel ultra-rapid freezing particle engineering process for enhancement of dissolution rates of poorly water-soluble drugs. Eur J Pharm Biopharm. 2007;65(1):57–67.
Wanning S, Suverkrup R, Lamprecht A. Pharmaceutical spray freeze drying. Int J Pharm. 2015;488(1–2):136–53.
USP USP. <1174> Powder Flow. USP29-NF24.28(2):618.
Nielsen LH, Gordon S, Holm R, Selen A, Rades T, Mullertz A. Preparation of an amorphous sodium furosemide salt improves solubility and dissolution rate and leads to a faster Tmax after oral dosing to rats. Eur J Pharm Biopharm. 2013;85(3 Pt B):942–51.
Reid JM, Walden CA, Qin R, Ziegler KL, Haslam JL, Rajewski RA, et al. Phase 0 clinical chemoprevention trial of the Akt inhibitor SR13668. Cancer Prev Res. 2011;4(3):347–53.
Sharma A, Benbrook DM, Woo S. First-in-human dose determination for a phase 0 study of SHetA2, a novel anticancer agent using the interspecies scaling. American Association of Pharmaceutical Scientists (AAPS): San Antonio; 2013.
Zijlstra GS, Hinrichs WL, de Boer AH, Frijlink HW. The role of particle engineering in relation to formulation and de-agglomeration principle in the development of a dry powder formulation for inhalation of cetrorelix. Eur J Pharm Sci. 2004;23(2):139–49.
Rahmati MR, Vatanara A, Parsian AR, Gilani K, Khosravi KM, Darabi M, et al. Effect of formulation ingredients on the physical characteristics of salmeterol xinafoate microparticles tailored by spray freeze drying. Adv Powder Technol. 2013;24(1):36–42.
Shah RB, Tawakkul MA, Khan MA. Comparative evaluation of flow for pharmaceutical powders and granules. AAPS PharmSciTech. 2008;9(1):250–8.
Liu LX, Marziano I, Bentham AC, Litster JD, White ET, Howes T. Effect of particle properties on the flowability of ibuprofen powders. Int J Pharm. 2008;362(1–2):109–17.
Garmise RJ, Staats HF, Hickey AJ. Novel dry powder preparations of whole inactivated influenza virus for nasal vaccination. AAPS PharmSciTech. 2007;8(4):E81.
El-Gendy N, Pornputtapitak W, Berkland C. Nanoparticle agglomerates of fluticasone propionate in combination with albuterol sulfate as dry powder aerosols. Eur J Pharm Sci. 2011;44(4):522–33.
Seo SW, Han HK, Chun MK, Choi HK. Preparation and pharmacokinetic evaluation of curcumin solid dispersion using Solutol(R) HS15 as a carrier. Int J Pharm. 2012;424(1–2):18–25.
Deng L, Wang Y, Gong T, Sun X, Zhang ZR. Dissolution and bioavailability enhancement of alpha-asarone by solid dispersions via oral administration. Drug Dev Ind Pharm. 2017;43(11):1817–26.
Zahedi P, Lee PI. Solid molecular dispersions of poorly water-soluble drugs in poly(2-hydroxyethyl methacrylate) hydrogels. Eur J Pharm Biopharm. 2007;65(3):320–8.
Hu L, Shi Y, Li JH, Gao N, Ji J, Niu F, et al. Enhancement of oral bioavailability of curcumin by a novel solid dispersion system. AAPS PharmSciTech. 2015;16(6):1327–34.
Childs SL, Kandi P, Lingireddy SR. Formulation of a danazol cocrystal with controlled supersaturation plays an essential role in improving bioavailability. Mol Pharm. 2013;10(8):3112–27.
Brouwers J, Brewster ME, Augustijns P. Supersaturating drug delivery systems: the answer to solubility-limited oral bioavailability? J Pharm Sci. 2009;98(8):2549–72.
Ibrahim M, Hatipoglu MK, Garcia-Contreras L. SHetA2 dry powder aerosols for tuberculosis: formulation, design, and optimization using quality by design. Mol Pharm. 2018;15(1):300–13.
Vo CL, Park C, Lee BJ. Current trends and future perspectives of solid dispersions containing poorly water-soluble drugs. Eur J Pharm Biopharm. 2013;85(3 Pt B):799–813.
Kalivoda A, Fischbach M, Kleinebudde P. Application of mixtures of polymeric carriers for dissolution enhancement of oxeglitazar using hot-melt extrusion. Int J Pharm. 2012;439(1–2):145–56.
Acknowledgments
We appreciate the generous gift of SHetA2 by Dr. Doris Benbrook at the Stephenson Cancer Center and of Kolliphor HS 15 from the BASF Company. We are thankful for Dr. Andrew Madden and Brittany Pritchett for performing the XRD analysis. This work was supported by start-up funds for Dr. Garcia-Contreras provided by the University of Oklahoma, College of Pharmacy. Ms. Ibrahim was partially supported by a Fulbright scholarship from Egypt.
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Ibrahim, M., Hatipoglu, M.K. & Garcia-Contreras, L. Cryogenic Fabrication of Dry Powders to Enhance the Solubility of a Promising Anticancer Drug, SHetA2, for Oral Administration. AAPS PharmSciTech 20, 20 (2019). https://doi.org/10.1208/s12249-018-1204-z
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DOI: https://doi.org/10.1208/s12249-018-1204-z