More About The Gabriela Chiosis Lab Minus iconIcon indicating subtraction, or that the element can be closed. Plus IconIcon indicating addition, or that the element can be opened. Arrow (down) icon.An arrow icon, usually indicating that the containing element can be opened and closed.

Hardik Patel

Research Scholar

Lab Phone


As a trained medicinal chemist with a background in the field of pharmacy, my objective is to utilize knowledge gained over the years towards the development of novel anticancer therapeutics in the treatment of breast cancer. At Memorial Sloan Kettering Cancer Center, I am pursuing a career as a research scientist with a broad understanding in the development of novel therapeutic approaches against cancer. My research in Dr. Chiosis laboratory is largely focused in the development of small molecule inhibitors of heat shock proteins that are responsible for chaperoning of client proteins involved in the pathogenesis of cancer and potentially other diseases.

Primarily, I have been working on the development of selective Grp94 (ER paralog of Hsp90) inhibitors for the treatment of breast cancer. In this regard, my research has focused on the design and synthesis of small-molecule inhibitors and chemical tools useful for detailed biological studies. Efforts thus far have resulted in the discovery and optimization of small molecule Grp94 inhibitors that we find occupy a novel allosteric binding site in Grp94, which was first identified by our lab in collaboration with the Dr. Gewirth lab at Hauptman-Woodward Medical Research Institute. These molecules are currently undergoing mechanistic and efficacy evaluation in pre-clinical models of breast cancer. I have also synthesized several chemical biology tools that have been instrumental in elucidating novel mechanisms associated with Grp94 in HER2-overexpressing breast cancer.

My secondary research project involves design and synthesis of a library of small molecule inhibitors of Hsp70, which like Hsp90 is characterized by high expression in tumor cells, and thus allowing the tumor to continue to thrive. These molecules are currently undergoing extensive pre-clinical evaluation as novel anticancer therapeutic agents. In this regard, I am actively involved in the numerous in vitro assays (microsomal stability, CYP inhibition, HERG inhibition and PAMPA) and in vivo evaluations (PK/PD analyses of drug action, preclinical toxicology and evaluation of drug efficacy in several breast tumor models) intended to evaluate the potential of these molecules as a drug.


Selected Publications

  1. Rodina, A.;  Patel, P. D.; Kang, Y.; Patel, Y.; Baaklini, I.;  Wong, M.J.H.; Taldone, T.; Pengrong Yan, P.; Yang, C.; Maharaj, R.; Gozman, A.; Patel, M.; Patel, H. J.; Erdjument-Bromage, H.; Talele, T. T.; Young, J. C.; Chiosis, G. Identification of an allosteric pocket on human Hsp70 reveals a novel mode of inhibition of this therapeutically important protein. Chem. Biol. 2013, 20 (12), 1469-1480. (Highlighted on the cover of December 19th 2013 Issue)  

  2. Patel, P. D.; Yan, P.; Seidler, P. M.; Patel, H. J.(co-first author); Sun, W.; Yang, C.; Que, N. S.; Taldone, T.; Finotti, P.; Stephani, R. A.; Gewirth, D. T.; Chiosis, G. Paralog-selective Hsp90 inhibitors define tumor-specific regulation of HER2. Nat. Chem. Biol., 2013, 9 (11), 677-684. (Highlighted in Cancer Discovery’s Research Watch, Oct. 2013; Highlighted by SciBX: Science-Business eXchange, Oct. 2013; Highlighted by StressMarq Biosciences Inc., Oct. 2013)

  3. Taldone, T.; Patel, P. D.; Patel, H. J.; Chiosis, G.  About the reaction of aryl fluorides with sodium sulfide: Investigation into the selectivity of substitution of fluorobenzonitriles to yield mercaptobenzonitriles via SNAr displacement of fluorine. Tet. Lett. 2012, 53 (20), 2548-2551.

  4. Patel, H. J.; Modi, S.; Chiosis, G.; Taldone, T. Advances in the discovery and development of HSP90 inhibitors for cancer treatment.  Expert Opin. Drug Dis. 2011, 6(5), 559-587.

  5. Patel, H. J.; Olgun, N.; Lengyel, I.; Reznik, S. E.; Stephani, R. A. 1,3,6-Trisubstituted-2-carboxy Quinolones:  Design, synthesis and in vitro pharmacological evaluation as Endothelin-A receptor (ETA) antagonist.  Bioorg. Med. Chem. Lett. 2010, 20 (22), 6840-6844.

  6. Olgun, N.; Patel, H. J.; Stephani, R.; lengyel, I.; Reznik, S. E.  Blockade of endothelin-1 with a novel series of 1,3,6-trisubstituted-2-carboxy-quinol-4-ones controls infection associated preterm birth.  Am. J. Pathol. 2010, 177 (4), 1929-35.

  7. Lengyel, I.; Patel, H. J.; Stephani, R. A.  The preparation and characterization of nineteen new phthalidyl spirohydantoins.  Heterocycles 2007, 73, 349-375.

  8. Patel, H. J.; Sarra, J.; Caruso, F.; Rossi, M.; Doshi, U.; Stephani, R. A.  Synthesis and anticonvulsant activity of new N-1’,N-3’-disubstituted-2’H,3H,5’H-spiro-(2-benzofuran-1,4’-imidazolidine)-2’,3,5’-triones.  Bioorg. Med. Chem. Lett. 2006, 16 (17), 4644-4647.