Abstract
Adrenocorticotrophic hormone (ACTH) is derived from the prohormone, pro-opiomelanocortin (POMC). This precursor undergoes proteolytic cleavage to yield a number of different peptides which vary depending on the tissue. In the anterior pituitary, POMC is processed to ACTH by the prohormone convertase, PC1 and packaged in secretory granules ready for stimulated secretion. In response to stress, corticotrophin releasing hormone (CRH), stimulates release of ACTH from the pituitary cell which in turn causes release of glucocorticoids from the adrenal gland. In tissues, such as the hypothalamus and skin, ACTH is further processed intracellularly to alpha melanocyte stimulating hormone (αMSH) which has distinct roles in these tissues. The prohormone, POMC, is itself released from cells and found in the human circulation at concentrations greater than ACTH. While much is known about the tightly regulated synthesis of POMC, there is still a lot to learn about the mechanisms for differentiating secretion of POMC, and the POMC-derived peptides. Understanding what happens to the POMC released from cells will provide new insights into its function.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Andresen JM, Moore HP (2001) Biogenesis of processing-competent secretory organelles in vitro. Biochemistry 40:13020–13030
Antoni FA (1996) Mortyn Jones Memorial Lecture – 1995. Calcium checks cyclic AMP – corticosteroid feedback in adenohypophysial corticotrophs. J Neuroendocrinol 8:659–672
Apletalina EV, Muller L, Lindberg I (2000) Mutations in the catalytic domain of prohormone convertase 2 result in decreased binding to 7B2 and loss of inhibition with 7B2 C-terminal peptide. J Biol Chem 275:14667–14677
Arnaoutova I, Smith AM, Coates LC et al (2003) The prohormone processing enzyme PC3 is a lipid raft-associated transmembrane protein. Biochemistry 42:10445–10455
Arnaoutova I, Cawley NX, Patel N et al (2008) Aquaporin 1 is important for maintaining secretory granule biogenesis in endocrine cells. Mol Endocrinol 22:1924–1934
Auernhammer CJ, Chesnokova V, Bousquet C et al (1998) Pituitary corticotroph SOCS-3: novel intracellular regulation of leukemia-inhibitory factor-mediated proopiomelanocortin gene expression and adrenocorticotropin secretion. Mol Endocrinol 12:954–961
Benjannet S, Rondeau N, Day R et al (1991) PC1 and PC2 are proprotein convertases capable of cleaving proopiomelanocortin at distinct pairs of basic residues. Proc Natl Acad Sci USA 88:3564–3568
Bergeron F, Leduc R, Day R (2000) Subtilase-like pro-protein convertases: from molecular specificity to therapeutic applications. J Mol Endocrinol 24:1–22
Bicknell AB (2008) The tissue-specific processing of pro-opiomelanocortin. J Neuroendocrinol 20:692–699
Bohm M, Eickelmann M, Li Z et al (2005) Detection of functionally active melanocortin receptors and evidence for an immunoregulatory activity of alpha-melanocyte-stimulating hormone in human dermal papilla cells. Endocrinology 146:4635–4646
Braks JA, Van Horssen AM, Martens GJ (1996) Dissociation of the complex between the neuroendocrine chaperone 7B2 and prohormone convertase PC2 is not associated with proPC2 maturation. Eur J Biochem 238:505–510
Buckingham JC (2006) Glucocorticoids: exemplars of multi-tasking. Br J Pharmacol 147(Suppl 1):S258–S268
Buzzetti R, McLoughlin L, Lavender PM et al (1989) Expression of pro-opiomelanocortin gene and quantification of adrenocorticotropic hormone-like immunoreactivity in human normal peripheral mononuclear cells and lymphoid and myeloid malignancies. J Clin Invest 83:733–737
Castro MG, Morrison E (1997) Post-translational processing of proopiomelanocortin in the pituitary and in the brain. Crit Rev Neurobiol 11:35–57
Cawley NX, Normant E, Chen A et al (2000) Oligomerization of pro-opiomelanocortin is independent of pH, calcium and the sorting signal for the regulated secretory pathway. FEBS Lett 481:37–41
Challis BG, Pritchard LE, Creemers JW et al (2002) A missense mutation disrupting a dibasic prohormone processing site in pro-opiomelanocortin (POMC) increases susceptibility to early-onset obesity through a novel molecular mechanism. Hum Mol Genet 11:1997–2004
Che FY, Yuan Q, Kalinina E et al (2004) Examination of the rate of peptide biosynthesis in neuroendocrine cell lines using a stable isotopic label and mass spectrometry. J Neurochem 90:585–594
Chen CL, Chang CC, Krieger DT et al (1986) Expression and regulation of proopiomelanocortin-like gene in the ovary and placenta: comparison with the testis. Endocrinology 118:2382–2389
Ciccotosto GD, Schiller MR, Eipper BA et al (1999) Induction of integral membrane PAM expression in AtT-20 cells alters the storage and trafficking of POMC and PC1. J Cell Biol 144:459–471
Coll AP, Challis BG, Yeo GS et al (2004a) The effects of proopiomelanocortin deficiency on murine adrenal development and responsiveness to adrenocorticotropin. Endocrinology 145:4721–4727
Coll AP, Farooqi IS, Challis BG et al (2004b) Proopiomelanocortin and energy balance: insights from human and murine genetics. J Clin Endocrinol Metab 89:2557–2562
Cone RD (1999) The central melanocortin system and energy homeostasis. Trends Endocrinol Metab 10:211–216
Cool DR, Fenger M, Snell CR et al (1995) Identification of the sorting signal motif within pro-opiomelanocortin for the regulated secretory pathway. J Biol Chem 270:8723–8729
Cool DR, Normant E, Shen F et al (1997) Carboxypeptidase E is a regulated secretory pathway sorting receptor: genetic obliteration leads to endocrine disorders in Cpe(fat) mice. Cell 88:73–83
Creemers JW, Lee YS, Oliver RL et al (2008) Mutations in the amino-terminal region of proopiomelanocortin (POMC) in patients with early-onset obesity impair POMC sorting to the regulated secretory pathway. J Clin Endocrinol Metab 93:4494–4499
Day R, Schafer MK, Watson SJ et al (1992) Distribution and regulation of the prohormone convertases PC1 and PC2 in the rat pituitary. Mol Endocrinol 6:485–497
Day R, Lazure C, Basak A et al (1998) Prodynorphin processing by proprotein convertase 2. Cleavage at single basic residues and enhanced processing in the presence of carboxypeptidase activity. J Biol Chem 273:829–836
de Souza FS, Santangelo AM, Bumaschny V et al (2005) Identification of neuronal enhancers of the proopiomelanocortin gene by transgenic mouse analysis and phylogenetic footprinting. Mol Cell Biol 25:3076–3086
Deacon CF, Nauck MA, Meier J et al (2000) Degradation of endogenous and exogenous gastric inhibitory polypeptide in healthy and in type 2 diabetic subjects as revealed using a new assay for the intact peptide. J Clin Endocrinol Metab 85:3575–3581
DeBold CR, Menefee JK, Nicholson WE et al (1988) Proopiomelanocortin gene is expressed in many normal human tissues and in tumors not associated with ectopic adrenocorticotropin syndrome. Mol Endocrinol 2:862–870
Dhanvantari S, Arnaoutova I, Snell CR et al (2002) Carboxypeptidase E, a prohormone sorting receptor, is anchored to secretory granules via a C-terminal transmembrane insertion. Biochemistry 41:52–60
Dong W, Day R (2002) Gene expression of proprotein convertases in individual rat anterior pituitary cells and their regulation in corticotrophs mediated by glucocorticoids. Endocrinology 143:254–262
Donn R, Berry A, Stevens A et al (2007) Use of gene expression profiling to identify a novel glucocorticoid sensitivity determining gene, BMPRII. FASEB J 21:402–414
Dumermuth E, Moore HP (1998) Analysis of constitutive and constitutive-like secretion in semi-intact pituitary cells. Methods 16:188–197
Emeson RB, Eipper BA (1986) Characterization of pro-ACTH/endorphin-derived peptides in rat hypothalamus. J Neurosci 6:837–849
Fortenberry Y, Liu J, Lindberg I (1999) The role of the 7B2 CT peptide in the inhibition of prohormone convertase 2 in endocrine cell lines. J Neurochem 73:994–1003
Fortenberry Y, Hwang JR, Apletalina EV et al (2002) Functional characterization of ProSAAS: similarities and differences with 7B2. J Biol Chem 277:5175–5186
Fricker LD, McKinzie AA, Sun J et al (2000) Identification and characterization of proSAAS, a granin-like neuroendocrine peptide precursor that inhibits prohormone processing. J Neurosci 20:639–648
Funkelstein L, Toneff T, Mosier C et al (2008) Major role of cathepsin L for producing the peptide hormones ACTH, beta-endorphin, and alpha-MSH, illustrated by protease gene knockout and expression. J Biol Chem 283:35652–35659
Gaitan D, DeBold CR, Turney MK et al (1995) Glucocorticoid receptor structure and function in an adrenocorticotropin-secreting small cell lung cancer. Mol Endocrinol 9:1193–1201
Gambacciani M, Liu JH, Swartz WH et al (1987) Intrinsic pulsatility of ACTH release from the human pituitary in vitro. Clin Endocrinol (Oxf) 26:557–563
Gibson S, Crosby SR, Stewart MF et al (1994) Differential release of proopiomelanocortin-derived peptides from the human pituitary: evidence from a panel of two-site immunoradiometric assays. J Clin Endocrinol Metab 78:835–841
Gibson S, Ray DW, Crosby SR et al (1996) Impaired processing of proopiomelanocortin in corticotroph macroadenomas. J Clin Endocrinol Metab 81:497–502
Gorr SU, Darling DS (1995) An N-terminal hydrophobic peak is the sorting signal of regulated secretory proteins. FEBS Lett 361:8–12
Grigorakis SI, Anastasiou E, Dai K et al (2000) Three mRNA transcripts of the proopiomelanocortin gene in human placenta at term. Eur J Endocrinol 142:533–536
Guo L, Munzberg H, Stuart RC et al (2004) N-acetylation of hypothalamic alpha-melanocyte-stimulating hormone and regulation by leptin. Proc Natl Acad Sci USA 101:11797–11802
Hansen IA, Fassnacht M, Hahner S et al (2004) The adrenal secretory serine protease AsP is a short secretory isoform of the transmembrane airway trypsin-like protease. Endocrinology 145:1898–1905
Jackson RS, Creemers JW, Ohagi S et al (1997) Obesity and impaired prohormone processing associated with mutations in the human prohormone convertase 1 gene. Nat Genet 16:303–306
Jingami H, Nakanishi S, Imura H et al (1984) Tissue distribution of messenger RNAs coding for opioid peptide precursors and related RNA. Eur J Biochem 142:441–447
John CD, Gavins FN, Buss NA et al (2008) Annexin A1 and the formyl peptide receptor family: neuroendocrine and metabolic aspects. Curr Opin Pharmacol 8:765–776
Konig S, Luger TA, Scholzen TE (2006) Monitoring neuropeptide-specific proteases: processing of the proopiomelanocortin peptides adrenocorticotropin and alpha-melanocyte-stimulating hormone in the skin. Exp Dermatol 15:751–761
Krude H, Biebermann H, Luck W et al (1998) Severe early-onset obesity, adrenal insufficiency and red hair pigmentation caused by POMC mutations in humans. Nat Genet 19:155–157
Lacaze-Masmonteil T, De KY, Luton JP et al (1987) Characterization of proopiomelanocortin transcripts in human nonpituitary tissues. Proc Natl Acad Sci USA 84:7261–7265
Laurent V, Jaubert-Miazza L, Desjardins R et al (2004) Biosynthesis of proopiomelanocortin-derived peptides in prohormone convertase 2 and 7B2 null mice. Endocrinology 145:519–528
Lavoie PL, Budry L, Balsalobre A et al (2008) Developmental dependence on NurRE and EboxNeuro for expression of pituitary proopiomelanocortin. Mol Endocrinol 22:1647–1657
Lee SN, Prodhomme E, Lindberg I (2004) Prohormone convertase 1 (PC1) processing and sorting: effect of PC1 propeptide and proSAAS. J Endocrinol 182:353–364
Lee SN, Hwang JR, Lindberg I (2006) Neuroendocrine protein 7B2 can be inactivated by phosphorylation within the secretory pathway. J Biol Chem 281:3312–3320
Levy A (2002) Physiological implications of pituitary trophic activity. J Endocrinol 174:147–155
Lindberg I, Smythe SJ, Dahl JL (1979) Regional distribution of enkephalin in bovine brain. Brain Res 168:200–204
Liotta AS, Loudes C, McKelvy JF, Krieger DT (1980) Biosynthesis of precursor corticotropin/endorphin-, corticotropin-, alpha-melanotropin-, beta-lipotropin-, and beta-endorphin-like material by cultured neonatal rat hypothalamic neurons. Proc Natl Acad Sci U S A 77(4):1880–1884
Loh YP, Kim T, Rodriguez YM et al (2004) Secretory granule biogenesis and neuropeptide sorting to the regulated secretory pathway in neuroendocrine cells. J Mol Neurosci 22:63–71
Luger TA, Brzoska T, Scholzen TE et al (2000) The role of alpha-MSH as a modulator of cutaneous inflammation. Ann NY Acad Sci 917:232–238
Lugo DI, Pintar JE (1996) Ontogeny of basal and regulated secretion from POMC cells of the developing anterior lobe of the rat pituitary gland. Dev Biol 173:95–109
Lusson J, Benjannet S, Hamelin J et al (1997) The integrity of the RRGDL sequence of the proprotein convertase PC1 is critical for its zymogen and C-terminal processing and for its cellular trafficking. Biochem J 326(Pt 3):737–744
Mains RE, Eipper BA (1990) The tissue-specific processing of Pro-ACTH/Endorphin recent advances and unsolved problems. Trends Endocrinol Metab 1:388–394
Martens C, Bilodeau S, Maira M et al (2005) Protein-protein interactions and transcriptional antagonism between the subfamily of NGFI-B/Nur77 orphan nuclear receptors and glucocorticoid receptor. Mol Endocrinol 19:885–897
Millington WR, Rosenthal DW, Unal CB et al (1999) Localization of pro-opiomelanocortin mRNA transcripts and peptide immunoreactivity in rat heart. Cardiovasc Res 43:107–116
Mousa SA, Shakibaei M, Sitte N, Schäfer M, Stein C (2004) Subcellular pathways of ß-endorphin synthesis, processing, and release from immunocytes in inflammatory pain. Endocrinology 145(3):1331–1341
Naggert JK, Fricker LD, Varlamov O et al (1995) Hyperproinsulinaemia in obese fat/fat mice associated with a carboxypeptidase E mutation which reduces enzyme activity. Nat Genet 10:135–142
Natori S, Huttner WB (1996) Chromogranin B (secretogranin I) promotes sorting to the regulated secretory pathway of processing intermediates derived from a peptide hormone precursor. Proc Natl Acad Sci USA 93:4431–4436
Nillni EA (2007) Regulation of prohormone convertases in hypothalamic neurons: implications for prothyrotropin-releasing hormone and proopiomelanocortin. Endocrinology 148:4191–4200
O’Rahilly S, Farooqi IS, Yeo GS et al (2003) Minireview: human obesity-lessons from monogenic disorders. Endocrinology 144:3757–3764
Oliver RL, Davis JR, White A (2003) Characterisation of ACTH related peptides in ectopic Cushing’s syndrome. Pituitary 6:119–126
Oyarce AM, Hand TA, Mains RE et al (1996) Dopaminergic regulation of secretory granule-associated proteins in rat intermediate pituitary. J Neurochem 67:229–241
Paquet L, Zhou A, Chang EY et al (1996) Peptide biosynthetic processing: distinguishing prohormone convertases PC1 and PC2. Mol Cell Endocrinol 120:161–168
Paus R, Theoharides TC, Arck PC (2006) Neuroimmunoendocrine circuitry of the ‘brain-skin connection’. Trends Immunol 27:32–39
Pritchard LE, Turnbull AV, White A (2002) Pro-opiomelanocortin processing in the hypothalamus: impact on melanocortin signalling and obesity. J Endocrinol 172:411–421
Pritchard LE, Oliver RL, McLoughlin JD et al (2003) Proopiomelanocortin-derived peptides in rat cerebrospinal fluid and hypothalamic extracts: evidence that secretion is regulated with respect to energy balance. Endocrinology 144:760–766
Pritchard LE, Armstrong D, Davies N et al (2004) Agouti-related protein (83–132) is a competitive antagonist at the human melanocortin-4 receptor: no evidence for differential interactions with pro-opiomelanocortin-derived ligands. J Endocrinol 180:183–191
Pritchard LE, White A (2007) Neuropeptide processing and its impact on melanocortin pathways. Endocrinology 148:4201–4207
Raffin-Sanson ML, De KY, Bertagna X (2003) Proopiomelanocortin, a polypeptide precursor with multiple functions: from physiology to pathological conditions. Eur J Endocrinol 149:79–90
Ray DW, Davis JR, White A et al (1996) Glucocorticoid receptor structure and function in glucocorticoid-resistant small cell lung carcinoma cells. Cancer Res 56:3276–3280
Rousseau K, Kauser S, Pritchard LE et al (2007) Proopiomelanocortin (POMC), the ACTH/melanocortin precursor, is secreted by human epidermal keratinocytes and melanocytes and stimulates melanogenesis. FASEB J 21:1844–1856
Rouzaud F, Costin GE, Yamaguchi Y et al (2006) Regulation of constitutive and UVR-induced skin pigmentation by melanocortin 1 receptor isoforms. FASEB J 20:1927–1929
Scholzen TE, Kalden DH, Brzoska T et al (2000) Expression of proopiomelanocortin peptides in human dermal microvascular endothelial cells: evidence for a regulation by ultraviolet light and interleukin-1. J Invest Dermatol 115:1021–1028
Seidah NG, Prat A (2002) Precursor convertases in the secretory pathway, cytosol and extracellular milieu. Essays Biochem 38:79–94
Seidah NG, Mayer G, Zaid A et al (2008) The activation and physiological functions of the proprotein convertases. Int J Biochem Cell Biol 40:1111–1125
Slominski A, Wortsman J, Tobin DJ (2005) The cutaneous serotoninergic/melatoninergic system: securing a place under the sun. FASEB J 19:176–194
Slominski A, Wortsman J, Tuckey RC et al (2007) Differential expression of HPA axis homolog in the skin. Mol Cell Endocrinol 265–266:143–149
Sommer P, Le RP, Gillingham H et al (2007) Glucocorticoid receptor overexpression exerts an antisurvival effect on human small cell lung cancer cells. Oncogene 26:7111–7121
Spiga F, Harrison LR, Wood SA et al (2008) Effect of the glucocorticoid receptor antagonist Org 34850 on fast and delayed feedback of corticosterone release. J Endocrinol 196:323–330
Stettler H, Suri G, Spiess M (2005) Proprotein convertase PC3 is not a transmembrane protein. Biochemistry 44:5339–5345
Stewart PM, Gibson S, Crosby SR et al (1994) ACTH precursors characterize the ectopic ACTH syndrome. Clin Endocrinol (Oxf) 40:199–204
Suli-Vargha H, Bodi J et al (1992) The effect of N-terminal substitutions on the biological activity of MSH fragments. Peptides 13:1145–1148
Tanaka S, Yora T, Nakayama K et al (1997) Proteolytic processing of pro-opiomelanocortin occurs in acidifying secretory granules of AtT-20 cells. J Histochem Cytochem 45:425–436
Tateno T, Izumiyama H, Doi M et al (2007) Defective expression of prohormone convertase 1/3 in silent corticotroph adenoma. Endocr J 54:777–782
Tsigos C, Crosby SR, Gibson S et al (1993) Proopiomelanocortin is the predominant adrenocorticotropin-related peptide in human cerebrospinal fluid. J Clin Endocrinol Metab 76:620–624
Tsujii S, Bray GA (1989) Acetylation alters the feeding response to MSH and beta-endorphin. Brain Res Bull 23:165–169
Van Kuppeveld FJ, Van Horssen AM, Martens GJ (1997) Intracellular transport, sorting, and proteolytic processing of regulated secretory proteins does not require protein sulfation. Mol Cell Endocrinol 136:29–35
Wang N, Zhang L, Miles L et al (2004) Plasminogen regulates pro-opiomelanocortin processing. J Thromb Haemost 2:785–796
Waters CE, Stevens A, White A et al (2004) Analysis of co-factor function in a glucocorticoid-resistant small cell carcinoma cell line. J Endocrinol 183:375–383
White A, Gibson S (1998) ACTH precursors: biological significance and clinical relevance. Clin Endocrinol (Oxf) 48:251–255
White A, Ray DW, Talbot A et al (2000) Cushing’s syndrome due to phaeochromocytoma secreting the precursors of adrenocorticotropin. J Clin Endocrinol Metab 85:4771–4775
White A (2005) Adrenocorticotropic Hormone. Endocrinology. Elsevier Saunders, Philadelphia, pp 323–339
Wilkinson CW (2006) Roles of acetylation and other post-translational modifications in melanocortin function and interactions with endorphins. Peptides 27:453–471
Zhou A, Mains RE (1994) Endoproteolytic processing of proopiomelanocortin and prohormone convertases 1 and 2 in neuroendocrine cells overexpressing prohormone convertases 1 or 2. J Biol Chem 269:17440–17447
Zhu X, Lindberg I (1995) 7B2 facilitates the maturation of proPC2 in neuroendocrine cells and is required for the expression of enzymatic activity. J Cell Biol 129:1641–1650
Zhu X, Zhou A, Dey A et al (2002) Disruption of PC1/3 expression in mice causes dwarfism and multiple neuroendocrine peptide processing defects. Proc Natl Acad Sci USA 99:10293–10298
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2009 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Stevens, A., White, A. (2009). ACTH: Cellular Peptide Hormone Synthesis and Secretory Pathways. In: Rehfeld, J., Bundgaard, J. (eds) Cellular Peptide Hormone Synthesis and Secretory Pathways. Results and Problems in Cell Differentiation, vol 50. Springer, Berlin, Heidelberg. https://doi.org/10.1007/400_2009_30
Download citation
DOI: https://doi.org/10.1007/400_2009_30
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-11834-0
Online ISBN: 978-3-642-11836-4
eBook Packages: Biomedical and Life SciencesBiomedical and Life Sciences (R0)