Skip to main content
Top
Published in: Cancer Chemotherapy and Pharmacology 5/2011

01-11-2011 | Original Article

Accumulation and distribution of doxorubicin in tumour spheroids: the influence of acidity and expression of P-glycoprotein

Authors: Howard R. Mellor, Richard Callaghan

Published in: Cancer Chemotherapy and Pharmacology | Issue 5/2011

Login to get access

Abstract

Purpose

The intra-tumour distribution of anticancer drugs remains an important, but often under-estimated, influence on drug efficacy. Tumour acidity and the presence of efflux pumps were examined for their influence on the distribution of doxorubicin in a solid tumour model.

Methods

Anticancer drug distribution and overall accumulation was measured in tumour spheroids (TS) of varying sizes. The distribution profiles were examined in normoxic and hypoxic TS, the latter generating metabolic acidosis. Finally, the drug distribution profiles were related to efficacy using radial outgrowth assays.

Results

In large tumour spheroids (TS) (d ~500 μm), intracellular accumulation of doxorubicin was restricted to cells in the outermost layers and failed to accumulate within the viable cells in the ‘intermediate’ hypoxic zone. A similar profile was obtained for another protonatable amine, 7-AAD. In contrast, the distribution of the non-ionisable drug (at physiological pH) BODIPY-Taxol was uniform throughout the TS. In order to independently model the hypoxic and normoxic zones of TS, we compared drug accumulation in small entirely normoxic TS (d ~200 μm) with equivalent sized ones exposed to hypoxia in an anaerobic chamber. Exposure of TS to hypoxia caused a considerable reduction in the pH of the bathing medium and lower tissue accumulation of doxorubicin. Interstitial acidity reduces the proportion of doxorubicin in the non-ionised form.

Conclusions

In TS, the accumulation and distribution of doxorubicin was influenced by both the expression of P-glycoprotein and hypoxia-induced acidity. Therefore, optimisation of doxorubicin chemotherapy for hypoxic tumours will require circumvention of both of these crucial pharmacokinetic determinants.
Literature
3.
go back to reference Mellor HR, Callaghan R (2008) Resistance to chemotherapy in cancer: a complex and integrated cellular response. Pharmacology 81(4):275–300PubMedCrossRef Mellor HR, Callaghan R (2008) Resistance to chemotherapy in cancer: a complex and integrated cellular response. Pharmacology 81(4):275–300PubMedCrossRef
5.
go back to reference Hietanen P, Blomqvist C, Wasenius VM, Niskanen E, Franssila K, Nordling S (1995) Do DNA ploidy and S-phase fraction in primary tumour predict the response to chemotherapy in metastatic breast cancer? Br J Cancer 71(5):1029–1032PubMedCrossRef Hietanen P, Blomqvist C, Wasenius VM, Niskanen E, Franssila K, Nordling S (1995) Do DNA ploidy and S-phase fraction in primary tumour predict the response to chemotherapy in metastatic breast cancer? Br J Cancer 71(5):1029–1032PubMedCrossRef
8.
9.
go back to reference Rosell R, Taron M, Barnadas A, Scagliotti G, Sarries C, Roig B (2003) Nucleotide excision repair pathways involved in Cisplatin resistance in non-small-cell lung cancer. Cancer Control 10(4):297–305PubMed Rosell R, Taron M, Barnadas A, Scagliotti G, Sarries C, Roig B (2003) Nucleotide excision repair pathways involved in Cisplatin resistance in non-small-cell lung cancer. Cancer Control 10(4):297–305PubMed
10.
go back to reference Trivedi RN, Almeida KH, Fornsaglio JL, Schamus S, Sobol RW (2005) The role of base excision repair in the sensitivity and resistance to temozolomide-mediated cell death. Cancer Res 65(14):6394–6400PubMedCrossRef Trivedi RN, Almeida KH, Fornsaglio JL, Schamus S, Sobol RW (2005) The role of base excision repair in the sensitivity and resistance to temozolomide-mediated cell death. Cancer Res 65(14):6394–6400PubMedCrossRef
11.
go back to reference Deng X, Kornblau SM, Ruvolo PP, May WS Jr (2001) Regulation of Bcl2 phosphorylation and potential significance for leukemic cell chemoresistance. J Natl Cancer Inst Monogr 2000(28):30–37 Deng X, Kornblau SM, Ruvolo PP, May WS Jr (2001) Regulation of Bcl2 phosphorylation and potential significance for leukemic cell chemoresistance. J Natl Cancer Inst Monogr 2000(28):30–37
12.
go back to reference Post LE (2002) Selectively replicating adenoviruses for cancer therapy: an update on clinical development. Curr Opin Investig Drugs 3(12):1768–1772PubMed Post LE (2002) Selectively replicating adenoviruses for cancer therapy: an update on clinical development. Curr Opin Investig Drugs 3(12):1768–1772PubMed
13.
go back to reference Sjostrom J, Blomqvist C, von Boguslawski K, Bengtsson NO, Mjaaland I, Malmstrom P, Ostenstadt B, Wist E, Valvere V, Takayama S, Reed JC, Saksela E (2002) The predictive value of bcl-2, bax, bcl-xL, bag-1, fas, and fasL for chemotherapy response in advanced breast cancer. Clin Cancer Res 8(3):811–816PubMed Sjostrom J, Blomqvist C, von Boguslawski K, Bengtsson NO, Mjaaland I, Malmstrom P, Ostenstadt B, Wist E, Valvere V, Takayama S, Reed JC, Saksela E (2002) The predictive value of bcl-2, bax, bcl-xL, bag-1, fas, and fasL for chemotherapy response in advanced breast cancer. Clin Cancer Res 8(3):811–816PubMed
14.
go back to reference Giaccone G, Gazdar AF, Beck H, Zunino F, Capranico G (1992) Multidrug sensitivity phenotype of human lung cancer cells associated with topoisomerase II expression. Cancer Res 52(7):1666–1674PubMed Giaccone G, Gazdar AF, Beck H, Zunino F, Capranico G (1992) Multidrug sensitivity phenotype of human lung cancer cells associated with topoisomerase II expression. Cancer Res 52(7):1666–1674PubMed
15.
go back to reference Gokmen-Polar Y, Escuin D, Walls CD, Soule SE, Wang Y, Sanders KL, Lavallee TM, Wang M, Guenther BD, Giannakakou P, Sledge GW Jr (2005) Beta-tubulin mutations are associated with resistance to 2-methoxyestradiol in MDA-MB-435 cancer cells. Cancer Res 65(20):9406–9414PubMedCrossRef Gokmen-Polar Y, Escuin D, Walls CD, Soule SE, Wang Y, Sanders KL, Lavallee TM, Wang M, Guenther BD, Giannakakou P, Sledge GW Jr (2005) Beta-tubulin mutations are associated with resistance to 2-methoxyestradiol in MDA-MB-435 cancer cells. Cancer Res 65(20):9406–9414PubMedCrossRef
16.
go back to reference Hari M, Loganzo F, Annable T, Tan X, Musto S, Morilla DB, Nettles JH, Snyder JP, Greenberger LM (2006) Paclitaxel-resistant cells have a mutation in the paclitaxel-binding region of beta-tubulin (Asp26Glu) and less stable microtubules. Mol Cancer Ther 5(2):270–278PubMedCrossRef Hari M, Loganzo F, Annable T, Tan X, Musto S, Morilla DB, Nettles JH, Snyder JP, Greenberger LM (2006) Paclitaxel-resistant cells have a mutation in the paclitaxel-binding region of beta-tubulin (Asp26Glu) and less stable microtubules. Mol Cancer Ther 5(2):270–278PubMedCrossRef
17.
go back to reference Matsumoto Y, Takano H, Nagao S, Fojo T (2001) Altered topoisomerase IIalpha and multidrug resistance-associated protein levels during drug selection: adaptations to increasing drug pressure. Jpn J Cancer Res 92(9):968–974PubMed Matsumoto Y, Takano H, Nagao S, Fojo T (2001) Altered topoisomerase IIalpha and multidrug resistance-associated protein levels during drug selection: adaptations to increasing drug pressure. Jpn J Cancer Res 92(9):968–974PubMed
19.
go back to reference Tannock IF, Lee CM, Tunggal JK, Cowan DS, Egorin MJ (2002) Limited penetration of anticancer drugs through tumor tissue: a potential cause of resistance of solid tumors to chemotherapy. Clin Cancer Res 8(3):878–884PubMed Tannock IF, Lee CM, Tunggal JK, Cowan DS, Egorin MJ (2002) Limited penetration of anticancer drugs through tumor tissue: a potential cause of resistance of solid tumors to chemotherapy. Clin Cancer Res 8(3):878–884PubMed
21.
go back to reference Modok S, Hyde P, Mellor HR, Roose T, Callaghan R (2006) Diffusivity and distribution of vinblastine in three-dimensional tumour tissue: Experimental and mathematical modelling. Eur J Cancer 42:2404–2413PubMedCrossRef Modok S, Hyde P, Mellor HR, Roose T, Callaghan R (2006) Diffusivity and distribution of vinblastine in three-dimensional tumour tissue: Experimental and mathematical modelling. Eur J Cancer 42:2404–2413PubMedCrossRef
26.
go back to reference Matherly LH (2001) Molecular and cellular biology of the human reduced folate carrier. Prog Nucleic Acid Res Mol Biol 67:131–162PubMedCrossRef Matherly LH (2001) Molecular and cellular biology of the human reduced folate carrier. Prog Nucleic Acid Res Mol Biol 67:131–162PubMedCrossRef
27.
go back to reference Gorlick R, Goker E, Trippett T, Steinherz P, Elisseyeff Y, Mazumdar M, Flintoff WF, Bertino JR (1997) Defective transport is a common mechanism of acquired methotrexate resistance in acute lymphocytic leukemia and is associated with decreased reduced folate carrier expression. Blood 89(3):1013–1018PubMed Gorlick R, Goker E, Trippett T, Steinherz P, Elisseyeff Y, Mazumdar M, Flintoff WF, Bertino JR (1997) Defective transport is a common mechanism of acquired methotrexate resistance in acute lymphocytic leukemia and is associated with decreased reduced folate carrier expression. Blood 89(3):1013–1018PubMed
28.
go back to reference Ifergan I, Meller I, Issakov J, Assaraf YG (2003) Reduced folate carrier protein expression in osteosarcoma: implications for the prediction of tumor chemosensitivity. Cancer 98(9):1958–1966. doi:10.1002/cncr.11741 PubMedCrossRef Ifergan I, Meller I, Issakov J, Assaraf YG (2003) Reduced folate carrier protein expression in osteosarcoma: implications for the prediction of tumor chemosensitivity. Cancer 98(9):1958–1966. doi:10.​1002/​cncr.​11741 PubMedCrossRef
29.
go back to reference Gottesman MM, Fojo T, Bates SE (2002) Multidrug resistance in cancer: role of ATP-dependent transporters. Nat Rev Cancer 2(1):48–58PubMedCrossRef Gottesman MM, Fojo T, Bates SE (2002) Multidrug resistance in cancer: role of ATP-dependent transporters. Nat Rev Cancer 2(1):48–58PubMedCrossRef
30.
go back to reference Modok S, Mellor HR, Callaghan R (2006) Modulation of multidrug resistance efflux pump activity to overcome chemoresistance in cancer. Curr Opin Pharmacol 6(4):350–354PubMedCrossRef Modok S, Mellor HR, Callaghan R (2006) Modulation of multidrug resistance efflux pump activity to overcome chemoresistance in cancer. Curr Opin Pharmacol 6(4):350–354PubMedCrossRef
31.
go back to reference Keppler D, Konig J (2000) Hepatic secretion of conjugated drugs and endogenous substances. Semin Liver Dis 20(3):265–272PubMedCrossRef Keppler D, Konig J (2000) Hepatic secretion of conjugated drugs and endogenous substances. Semin Liver Dis 20(3):265–272PubMedCrossRef
32.
go back to reference Loe DW, Almquist KC, Cole SP, Deeley RG (1996) ATP-dependent 17 beta-estradiol 17-(beta-D-glucuronide) transport by multidrug resistance protein (MRP). Inhibition by cholestatic steroids. J Biol Chem 271(16):9683–9689PubMedCrossRef Loe DW, Almquist KC, Cole SP, Deeley RG (1996) ATP-dependent 17 beta-estradiol 17-(beta-D-glucuronide) transport by multidrug resistance protein (MRP). Inhibition by cholestatic steroids. J Biol Chem 271(16):9683–9689PubMedCrossRef
33.
go back to reference Loe DW, Stewart RK, Massey TE, Deeley RG, Cole SP (1997) ATP-dependent transport of aflatoxin B1 and its glutathione conjugates by the product of the multidrug resistance protein (MRP) gene. Mol Pharmacol 51(6):1034–1041PubMed Loe DW, Stewart RK, Massey TE, Deeley RG, Cole SP (1997) ATP-dependent transport of aflatoxin B1 and its glutathione conjugates by the product of the multidrug resistance protein (MRP) gene. Mol Pharmacol 51(6):1034–1041PubMed
34.
go back to reference Adams DJ (2005) The impact of tumor physiology on camptothecin-based drug development. Curr Med Chem Anticancer Agents 5(1):1–13PubMedCrossRef Adams DJ (2005) The impact of tumor physiology on camptothecin-based drug development. Curr Med Chem Anticancer Agents 5(1):1–13PubMedCrossRef
40.
go back to reference Wykoff CC, Beasley NJ, Watson PH, Turner KJ, Pastorek J, Sibtain A, Wilson GD, Turley H, Talks KL, Maxwell PH, Pugh CW, Ratcliffe PJ, Harris AL (2000) Hypoxia-inducible expression of tumor-associated carbonic anhydrases. Cancer Res 60(24):7075–7083PubMed Wykoff CC, Beasley NJ, Watson PH, Turner KJ, Pastorek J, Sibtain A, Wilson GD, Turley H, Talks KL, Maxwell PH, Pugh CW, Ratcliffe PJ, Harris AL (2000) Hypoxia-inducible expression of tumor-associated carbonic anhydrases. Cancer Res 60(24):7075–7083PubMed
41.
go back to reference Comerford KM, Wallace TJ, Karhausen J, Louis NA, Montalto MC, Colgan SP (2002) Hypoxia-inducible factor-1-dependent regulation of the multidrug resistance (MDR1) gene. Cancer Res 62(12):3387–3394PubMed Comerford KM, Wallace TJ, Karhausen J, Louis NA, Montalto MC, Colgan SP (2002) Hypoxia-inducible factor-1-dependent regulation of the multidrug resistance (MDR1) gene. Cancer Res 62(12):3387–3394PubMed
42.
go back to reference Wartenberg M, Ling FC, Muschen M, Klein F, Acker H, Gassmann M, Petrat K, Putz V, Hescheler J, Sauer H (2003) Regulation of the multidrug resistance transporter P-glycoprotein in multicellular tumor spheroids by hypoxia-inducible factor (HIF-1) and reactive oxygen species. FASEB J 17(3):503–505. doi:10.1096/fj.02-0358fje02-0358fje[pii] PubMed Wartenberg M, Ling FC, Muschen M, Klein F, Acker H, Gassmann M, Petrat K, Putz V, Hescheler J, Sauer H (2003) Regulation of the multidrug resistance transporter P-glycoprotein in multicellular tumor spheroids by hypoxia-inducible factor (HIF-1) and reactive oxygen species. FASEB J 17(3):503–505. doi:10.​1096/​fj.​02-0358fje02-0358fje[pii] PubMed
44.
go back to reference Mellor HR, Ferguson DJ, Callaghan R (2005) A model of quiescent tumour microregions for evaluating multicellular resistance to chemotherapeutic drugs. Br J Cancer 93(3):302–309PubMedCrossRef Mellor HR, Ferguson DJ, Callaghan R (2005) A model of quiescent tumour microregions for evaluating multicellular resistance to chemotherapeutic drugs. Br J Cancer 93(3):302–309PubMedCrossRef
45.
go back to reference Mellor HR, Snelling S, Hall MD, Modok S, Jaffar M, Hambley TW, Callaghan R (2005) The influence of tumour microenvironmental factors on the efficacy of cisplatin and novel platinum (IV) complexes. Biochem Pharmacol 70(8):1137–1146PubMedCrossRef Mellor HR, Snelling S, Hall MD, Modok S, Jaffar M, Hambley TW, Callaghan R (2005) The influence of tumour microenvironmental factors on the efficacy of cisplatin and novel platinum (IV) complexes. Biochem Pharmacol 70(8):1137–1146PubMedCrossRef
46.
go back to reference Martin C, Walker J, Rothnie A, Callaghan R (2003) The expression of P-glycoprotein does influence the distribution of novel fluorescent compounds in solid tumour models. Br J Cancer 89:1581–1589PubMedCrossRef Martin C, Walker J, Rothnie A, Callaghan R (2003) The expression of P-glycoprotein does influence the distribution of novel fluorescent compounds in solid tumour models. Br J Cancer 89:1581–1589PubMedCrossRef
47.
go back to reference Walker J, Martin C, Callaghan R (2004) Inhibition of P-glycoprotein function by XR9576 in a solid tumour model can restore anticancer drug efficacy. Eur J Cancer 40:594–605PubMedCrossRef Walker J, Martin C, Callaghan R (2004) Inhibition of P-glycoprotein function by XR9576 in a solid tumour model can restore anticancer drug efficacy. Eur J Cancer 40:594–605PubMedCrossRef
49.
go back to reference Henning Ta, Kraus Mb, Brischwein Ma, AMa Otto, Ba Wolf (2004) Relevance of tumor microenvironment for progression, therapy and drug development. Anti-Cancer Drugs 15(1):7–14PubMedCrossRef Henning Ta, Kraus Mb, Brischwein Ma, AMa Otto, Ba Wolf (2004) Relevance of tumor microenvironment for progression, therapy and drug development. Anti-Cancer Drugs 15(1):7–14PubMedCrossRef
50.
go back to reference Marie JP, Zhou DC, Gurbuxani S, Legrand O, Zittoun R (1996) MDR1/P-glycoprotein in haematological neoplasms. Eur J Cancer 32A(6):1034–1038PubMedCrossRef Marie JP, Zhou DC, Gurbuxani S, Legrand O, Zittoun R (1996) MDR1/P-glycoprotein in haematological neoplasms. Eur J Cancer 32A(6):1034–1038PubMedCrossRef
51.
go back to reference Trock BJ, Leonessa F, Clarke R (1997) Multidrug resistance in breast cancer: a meta-analysis of MDR1/gp170 expression and its possible functional significance. J Natl Cancer Inst 89(13):917–931PubMedCrossRef Trock BJ, Leonessa F, Clarke R (1997) Multidrug resistance in breast cancer: a meta-analysis of MDR1/gp170 expression and its possible functional significance. J Natl Cancer Inst 89(13):917–931PubMedCrossRef
55.
go back to reference Lotz C, Kelleher DK, Gassner B, Gekle M, Vaupel P, Thews O (2007) Role of the tumor microenvironment in the activity and expression of the p-glycoprotein in human colon carcinoma cells. Oncol Rep 17(1):239–244PubMed Lotz C, Kelleher DK, Gassner B, Gekle M, Vaupel P, Thews O (2007) Role of the tumor microenvironment in the activity and expression of the p-glycoprotein in human colon carcinoma cells. Oncol Rep 17(1):239–244PubMed
56.
go back to reference Sauvant C, Nowak M, Wirth C, Schneider B, Riemann A, Gekle M, Thews O (2008) Acidosis induces multi-drug resistance in rat prostate cancer cells (AT1) in vitro and in vivo by increasing the activity of the p-glycoprotein via activation of p38. Int J Cancer 123(11):2532–2542. doi:10.1002/ijc.23818 PubMedCrossRef Sauvant C, Nowak M, Wirth C, Schneider B, Riemann A, Gekle M, Thews O (2008) Acidosis induces multi-drug resistance in rat prostate cancer cells (AT1) in vitro and in vivo by increasing the activity of the p-glycoprotein via activation of p38. Int J Cancer 123(11):2532–2542. doi:10.​1002/​ijc.​23818 PubMedCrossRef
58.
go back to reference Netti PA, Hamberg LM, Babich JW, Kierstead D, Graham W, Hunter GJ, Wolf GL, Fischman A, Boucher Y, Jain RK (1999) Enhancement of fluid filtration across tumor vessels: implication for delivery of macromolecules. Proc Natl Acad Sci USA 96(6):3137–3142PubMedCrossRef Netti PA, Hamberg LM, Babich JW, Kierstead D, Graham W, Hunter GJ, Wolf GL, Fischman A, Boucher Y, Jain RK (1999) Enhancement of fluid filtration across tumor vessels: implication for delivery of macromolecules. Proc Natl Acad Sci USA 96(6):3137–3142PubMedCrossRef
59.
go back to reference Stohrer M, Boucher Y, Stangassinger M, Jain RK (2000) Oncotic pressure in solid tumors is elevated. Cancer Res 60(15):4251–4255PubMed Stohrer M, Boucher Y, Stangassinger M, Jain RK (2000) Oncotic pressure in solid tumors is elevated. Cancer Res 60(15):4251–4255PubMed
61.
go back to reference Glunde K, Düßmann H, Juretschke H-P, Leibfritz D (2002) Na < sup >+</sup >/H < sup >+</sup > exchange subtype 1 inhibition during extracellular acidification and hypoxia in glioma cells. J Neurochem 80(1):36–44PubMedCrossRef Glunde K, Düßmann H, Juretschke H-P, Leibfritz D (2002) Na < sup >+</sup >/H < sup >+</sup > exchange subtype 1 inhibition during extracellular acidification and hypoxia in glioma cells. J Neurochem 80(1):36–44PubMedCrossRef
62.
go back to reference Whittingtons DA, Grubb JH, Waheed A, Shah GN, Sly WS, Christianson DW (2004) Expression, assay, and structure of the extracellular domain of murine carbonic anhydrase XIV. J Biol Chem 279(8):7223–7228. doi:10.1074/jbc.M310809200 CrossRef Whittingtons DA, Grubb JH, Waheed A, Shah GN, Sly WS, Christianson DW (2004) Expression, assay, and structure of the extracellular domain of murine carbonic anhydrase XIV. J Biol Chem 279(8):7223–7228. doi:10.​1074/​jbc.​M310809200 CrossRef
63.
go back to reference Winum J-Y, Rami M, Scozzafava A, Montero J-L, Supuran C (2008) Carbonic anhydrase IX: a new druggable target for the design of antitumor agents. Med Res Rev 28(3):445–463PubMedCrossRef Winum J-Y, Rami M, Scozzafava A, Montero J-L, Supuran C (2008) Carbonic anhydrase IX: a new druggable target for the design of antitumor agents. Med Res Rev 28(3):445–463PubMedCrossRef
64.
go back to reference Kaluz S, Kaluzová M, Liao S-Y, Lerman M, Stanbridge EJ (2009) Transcriptional control of the tumor- and hypoxia-marker carbonic anhydrase 9: a one transcription factor (HIF-1) show? Biochim Biophys Acta (BBA)––Rev Cancer 1795(2):162–172CrossRef Kaluz S, Kaluzová M, Liao S-Y, Lerman M, Stanbridge EJ (2009) Transcriptional control of the tumor- and hypoxia-marker carbonic anhydrase 9: a one transcription factor (HIF-1) show? Biochim Biophys Acta (BBA)––Rev Cancer 1795(2):162–172CrossRef
65.
go back to reference Rodriguez-Enriquez S, Gallardo-Perez JC, Aviles-Salas A, Marin-Hernandez A, Carreno-Fuentes L, Maldonado-Lagunas V, Moreno-Sanchez R (2008) Energy metabolism transition in multi-cellular human tumor spheroids. J Cell Physiol 216(1):189–197. doi:10.1002/jcp.21392 PubMedCrossRef Rodriguez-Enriquez S, Gallardo-Perez JC, Aviles-Salas A, Marin-Hernandez A, Carreno-Fuentes L, Maldonado-Lagunas V, Moreno-Sanchez R (2008) Energy metabolism transition in multi-cellular human tumor spheroids. J Cell Physiol 216(1):189–197. doi:10.​1002/​jcp.​21392 PubMedCrossRef
66.
go back to reference Enerson BE, Drewes LR (2003) Molecular features, regulation, and function of monocarboxylate transporters: Implications for drug delivery. J Pharm Sci 92(8):1531–1544PubMedCrossRef Enerson BE, Drewes LR (2003) Molecular features, regulation, and function of monocarboxylate transporters: Implications for drug delivery. J Pharm Sci 92(8):1531–1544PubMedCrossRef
67.
go back to reference Sonveaux P, Vegran F, Schroeder T, Wergin MC, Verrax J, Rabbani ZN, De Saedeleer CJ, Kennedy KM, Diepart C, Jordan BF, Kelley MJ, Gallez B, Wahl ML, Feron O, Dewhirst MW (2008) Targeting lactate-fueled respiration selectively kills hypoxic tumor cells in mice. J Clin Invest 118(12):3930–3942. doi:36843[pii]10.1172/JCI36843 PubMed Sonveaux P, Vegran F, Schroeder T, Wergin MC, Verrax J, Rabbani ZN, De Saedeleer CJ, Kennedy KM, Diepart C, Jordan BF, Kelley MJ, Gallez B, Wahl ML, Feron O, Dewhirst MW (2008) Targeting lactate-fueled respiration selectively kills hypoxic tumor cells in mice. J Clin Invest 118(12):3930–3942. doi:36843[pii]10.​1172/​JCI36843 PubMed
68.
go back to reference Semenza GL (2008) Tumor metabolism: cancer cells give and take lactate. J Clin Invest 118(12):3835–3837PubMed Semenza GL (2008) Tumor metabolism: cancer cells give and take lactate. J Clin Invest 118(12):3835–3837PubMed
69.
go back to reference Miraglia E, Viarisio D, Riganti C, Costamagna C, Ghigo D, Bosia A (2005) Na +/H + exchanger activity is increased in doxorubicin-resistant human colon cancer cells and its modulation modifies the sensitivity of the cells to doxorubicin. Int J Cancer 115(6):924–929PubMedCrossRef Miraglia E, Viarisio D, Riganti C, Costamagna C, Ghigo D, Bosia A (2005) Na +/H + exchanger activity is increased in doxorubicin-resistant human colon cancer cells and its modulation modifies the sensitivity of the cells to doxorubicin. Int J Cancer 115(6):924–929PubMedCrossRef
Metadata
Title
Accumulation and distribution of doxorubicin in tumour spheroids: the influence of acidity and expression of P-glycoprotein
Authors
Howard R. Mellor
Richard Callaghan
Publication date
01-11-2011
Publisher
Springer-Verlag
Published in
Cancer Chemotherapy and Pharmacology / Issue 5/2011
Print ISSN: 0344-5704
Electronic ISSN: 1432-0843
DOI
https://doi.org/10.1007/s00280-011-1598-8

Other articles of this Issue 5/2011

Cancer Chemotherapy and Pharmacology 5/2011 Go to the issue
Webinar | 19-02-2024 | 17:30 (CET)

Keynote webinar | Spotlight on antibody–drug conjugates in cancer

Antibody–drug conjugates (ADCs) are novel agents that have shown promise across multiple tumor types. Explore the current landscape of ADCs in breast and lung cancer with our experts, and gain insights into the mechanism of action, key clinical trials data, existing challenges, and future directions.

Dr. Véronique Diéras
Prof. Fabrice Barlesi
Developed by: Springer Medicine