Research

Randolph H. Hastings, MD, PhD

E-mail : rhhastings@ucsd.edu

Hastings’ laboratory studies mechanisms that regulate lung cancer progression, particularly involving parathyroid hormone-related protein (PTHrP).  PTHrP is a paraneoplastic protein that is expressed in roughly two-thirds of all non-small lung carcinomas (NSCLC). The receptor for PTHrP is frequently present in lung cancers and is also made in pulmonary endothelial cells and other cells derived from normal lung. PTHrP exerts effects on cell growth, apoptosis and invasiveness. For example, Dr. Hastings has found that PTHrP modifies the sensitivity of lung cancer cells to apoptotic stimuli through a protein kinase A-dependent mechanism. Animal and patient studies in Dr. Hastings' laboratory indicate that PTHrP inhibits lung cancer growth and shortens patient survival. In patients with non-small cell lung carcinoma, tumor PTHrP expression is associated with longer survival consistent with an inhibitory effect of PTHrP on cancer. Interestingly, the protective effect of PTHrP occurs only in women, not in men. Ongoing work suggests that androgens inhibit lung cancer PTHrP expression through the Akt/MTOR pathway.

References (Selected From 89 Publications)

Hastings RH, Delson N. Balancing the force of direct laryngoscopy with manual in-line stabilization.  Anesthesiology.;111:1158-9; author reply 1159-60, 2009.

Hastings RH, Montgrain PR, Quintana R, Rascon Y, Deftos LJ, Healy E.  Cell cycle actions of parathyroid hormone-related protein in non-small cell lung carcinoma.Am J Physiol Lung Cell Mol Physiol. 297:L578-85. 2009.

Aiken SD, Delson N, Davidson TM, Hastings RH. A two-dimensional model of anatomic relationships during laryngoscopy.Anesth Analg.;105:1118-26, 2007

Montgrain PR, Quintana R, Rascon Y, Burton DW, Deftos LJ, Casillas A, Hastings  RH. Parathyroid hormone-related protein varies with sex and androgen status in nonsmall cell lung cancer.  Cancer. 110:1313-20, 2007

Tsigelny I, Burton DW, Sharikov Y, Hastings RH, Deftos LJ.  Coherent expression chromosome cluster analysis reveals differential regulatory functions of amino-terminal and distal parathyroid hormone-related protein domains in prostate carcinoma. J Biomed Biotechnol. 2005:353-63, 2005

Hastings RH, Laux AM, Casillas A, Xu R, Lukas Z, Ernstrom K, Deftos LJ.  Sex-specific survival advantage with parathyroid hormone-related protein in non-small cell lung carcinoma patients. Clin Cancer Res. 12:499-506, 2006

Hastings RH, Araiza F, Burton DW, Bedley M, Deftos LJ. Parathyroid hormone-related protein regulates apoptosis in lung cancer cells through protein kinase A. Am J Physiol Cell Physiol. 287:C1616-22, 2004

Hastings RH, Araiza F, Burton DW, Zhang L, Bedley M, Deftos LJ. Parathyroid hormone-related protein ameliorates death receptor-mediated apoptosis in lung cancer cells.  Am J Physiol Cell Physiol. 285:C1429-36, 2003.