1. Evolution of proopiomelanocortinAna Rocha, Alejandra Godino-Gimeno and José Miguel Cerdá-Reverter2. Structure and dynamics of dynorphin peptide and its receptorGuillaume Ferré, Georges Czaplicki, Pascal Demange and Alain Milon3. Molecular aspects of delta opioid receptorsLouis Gendron, Karim Nagi, Manel Zeghal, Patrick M. Giguère and Graciela Pineyro4. The role of heat shock protein 90 in regulating pain, opioid signaling, and opioid antinociceptionJohn M. Streicher5. Enkephalinase regulationM. Ramírez-Sánchez, I. Prieto, A.B. Segarra, M. Martínez-Cañamero, I. Banegas and M. de Gasparo6. Limbic circuit connectivity and the stress response: New insights into the mammalian nociceptin peptide systemAllison Jane Fulford and Sarah Keskes7. Enkephalins and ACTH in the mammalian nervous systemEwing Duque-Díaz, Olga Alvarez-Ojeda and Rafael Coveñas8. Opioids and the hormone oxytocinLeda Kovatsi and Kakia Nikolaou9. Estrogens as arbiters of sex-specific and reproductive cycle-dependent opioid mechanismsAlan R Gintzler, Emiliya M. Storman and Nai-Jiang Liu10. Opioids and reproductionBeata Seeber, Bettina Böttcher, Elisabeth D´Costa and Ludwig Wildt11. Kappa opioid receptor and oligodendrocyte remyelinationFei Wang and Feng Mei12. Inhibitory role of Gi-coupled receptors on cAMP-driven cancers with focus on opioid receptors in lung adenocarcinoma and its stem cellsHildegard M. Schuller13. Prenatal ethanol exposure and enkephalinergic neurotransmissionMilagros Méndez, Karla Hernández-Fonseca and Paula Abate
Dr. Litwack has authored 3 textbooks on biochemistry and hormones (one with John Wiley & Sons and 2 with Academic Press/Elsevier) and he has edited more than 70 volumes in the Vitamins & Hormones series (Academic Press/Elsevier); he has edited 14 volumes entitled Biochemical Actions of Hormones (Academica Press); He has edited (with David Kritchevsky) Actions of Hormones on Molecular Processes (Academic Press)