Article

Non-temperature-induced antitumor effects of amplitude-modulated radiofrequency: molecular and functional synergies with radiotherapy.
Veltsista, Paraskevi D., Walther, Wolfgang ORCID: https://orcid.org/0000-0003-2360-1370, Torke, Sebastian ORCID: https://orcid.org/0000-0002-1029-3623, Ivanov, Andranik ORCID: https://orcid.org/0000-0002-4824-1925, Dieper, Anna, Beule, Dieter ORCID: https://orcid.org/0000-0002-3284-0632, Zips, Daniel, Stein, Ulrike ORCID: https://orcid.org/0000-0001-7006-282X and Ghadjar, Pirus
Cancers 18 (10): 1613. May 2026

The regulatory interplay of the colorectal cancer biomarkers MACC1 and IER2 and its impact on metastatic cancer survival.
Alberto Vilchez, Miguel Enrique ORCID: https://orcid.org/0000-0002-6249-6932, Kortüm, Benedikt ORCID: https://orcid.org/0000-0003-3734-6665, Schöpe, Paul ORCID: https://orcid.org/0000-0002-5512-8832, Kyjacova, Lenka, Zincke, Fabian, Osterland, Marc ORCID: https://orcid.org/0000-0001-9133-9322, Walther, Wolfgang ORCID: https://orcid.org/0000-0003-2360-1370, Rau, Beate ORCID: https://orcid.org/0000-0001-5820-6907, Sleeman, Jonathan ORCID: https://orcid.org/0000-0003-1718-7687 and Stein, Ulrike ORCID: https://orcid.org/0000-0001-7006-282X
Biomolecules 16 (3): 398. March 2026

In colon epithelia, Clostridium perfringens enterotoxin causes focal leaks by targeting claudins which are apically accessible due to tight junction derangement.
Eichner, M., Augustin, C., Fromm, A., Piontek, A., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Buecker, R., Fromm, M., Krause, G., Schulzke, J.D., Guenzel, D. and Piontek, J.
Journal of Infectious Diseases 217 (1): 147-157. 27 December 2017

Statin and rottlerin small-molecule inhibitors restrict colon cancer progression and metastasis via MACC1.
Juneja, M., Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Voss, C., Smith, J., Specker, E. ORCID: https://orcid.org/0000-0002-9471-9520, Neuenschwander, M. ORCID: https://orcid.org/0000-0002-3114-7975, Gohlke, B.O. ORCID: https://orcid.org/0000-0003-3094-1031, Dahlmann, M. ORCID: https://orcid.org/0000-0002-0036-5283, Radetzki, S. ORCID: https://orcid.org/0000-0003-2688-2868, Preissner, R., von Kries, J.P. ORCID: https://orcid.org/0000-0003-4716-4988, Schlag, P.M. and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
PLoS Biology 15 (6): e2000784. 1 June 2017

In vitro and in vivo investigations into the carbene gold chloride and thioglucoside anticancer drug candidates NHC-AuCl and NHC-AuSR.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Dada, O., O’Beirne, C., Ott, I., Sanchez-Sanz, G., Schmidt, C., Werner, C., Zhu, X. and Tacke, M.
Letters in Drug Design & Discovery 14 (2): 125-134. 2017

SPON2, a newly identified target gene of MACC1, drives colorectal cancer metastasis in mice and is prognostic for colorectal cancer patient survival.
Schmid, F., Wang, Q. ORCID: https://orcid.org/0000-0002-3803-2927, Huska, M.R. ORCID: https://orcid.org/0000-0002-0912-745X, Andrade-Navarro, M.A. ORCID: https://orcid.org/0000-0001-6650-1711, Lemm, M., Fichtner, I., Dahlmann, M. ORCID: https://orcid.org/0000-0002-0036-5283, Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Smith, J., Schlag, P.M. and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Oncogene 35 (46): 5942-5952. 17 November 2016

Chemosensitization by diverging modulation by short-term and long-term TNF-α action on ABCB1 expression and NF-κB signaling in colon cancer.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Bauer, L., Aumann, J. and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
International Journal of Oncology 47 (6): 2276-2285. December 2015

Oncoleaking: use of the pore-forming clostridium perfringens enterotoxin (CPE) for suicide gene therapy.
Pahle, J., Aumann, J., Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648 and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Methods in Molecular Biology 1317 : 69-85. 2015

In vitro and in vivo investigations into the carbene copper bromide anticancer drug candidate WBC4.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Fichtner, I., Hackenberg, F., Streciwilk, W. and Tacke, M.
Letters in Drug Design & Discovery 11 (7): 825-832. August 2014

Preclinical study on combined chemo- and nonviral gene therapy for sensitization of melanoma using a human TNF-alpha expressing MIDGE DNA vector.
Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Aumann, J., Schmidt, M., Wittig, B., Fichtner, I., Behrens, D., Lemm, M., Freundt, G., Schlag, P.M. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Molecular Oncology 8 (3): 609-619. May 2014

A seven-year storage report of good manufacturing practice-grade naked plasmid DNA: stability, topology, and in vitro/in vivo functional analysis.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Schmeer, M., Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Baier, R., Harder, A., Walhorn, V., Anselmetti, D., Aumann, J., Fichtner, I. and Schleef, M.
Human Gene Therapy Clinical Development 24 (4): 147-153. December 2013

The activity of titanocene T against xenografted Caki-1 tumors.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Fichtner, I., Deally, A., Hogan, M. and Tacke, M.
Letters in Drug Design & Discovery 10 (5): 375-381. June 2013

Performance of high quality minicircle DNA for in vitro and in vivo gene transfer.
Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Schleef, M., Schmeer, M., Aumann, J., Schlag, P.M. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Molecular Biotechnology 53 (1): 80-89. January 2013

HER2/neu DNA vaccination by intradermal gene delivery in a mouse tumor model: gene gun is superior to jet injector in inducing CTL responses and protective immunity.
Nguyen-Hoai, T., Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Hohn, O., Vu, M.D. ORCID: https://orcid.org/0000-0001-8932-2142, Schlag, P.M., Doerken, B. ORCID: https://orcid.org/0000-0001-7991-3643, Norley, S., Lipp, M. ORCID: https://orcid.org/0000-0002-0087-2672, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Pezzutto, A. ORCID: https://orcid.org/0000-0002-3246-4470 and Westermann, J.
OncoImmunology 1 (9): 1537-1545. 1 December 2012

In vivo imaging of colorectal cancer growth and metastasis by targeting MACC1 with shRNA in xenografted mice.
Pichorner, A., Sack, U., Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Kelch, I., Arlt, F., Smith, J., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Schlag, P.M. and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Clinical and Experimental Metastasis 29 (6): 573-583. August 2012

Intratumoral dispersion, retention, systemic biodistribution, and clearance of a small-size tumor necrosis factor-α-expressing MIDGE vector after nonviral in vivo jet-injection gene transfer.
Galling, N., Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Aumann, J., Schmidt, M., Wittig, B., Schlag, P.M. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Human Gene Therapy Part B Methods 23 (4): 264-270. August 2012

Novel Clostridium perfringens enterotoxin suicide gene therapy for selective treatment of claudin-3- and -4-overexpressing tumors.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Petkov, S., Kuvardina, O.N., Aumann, J., Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Fichtner, I., Lemm, M., Piontek, J., Blasig, I.E., Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Schlag, P.M.
Gene Therapy 19 (5): 494-503. May 2012

Impact of mutant beta-catenin on ABCB1 expression and therapy response in colon cancer cells.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Fleuter, C., Siegel, F., Smith, J., Kopacek, A., Scudiero, D.A., Hite, K.M., Schlag, P.M., Shoemaker, R.H. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
British Journal of Cancer 106 (8): 1395-1405. 10 April 2012

S100A4-induced cell motility and metastasis is restricted by the Wnt/β-catenin pathway inhibitor calcimycin in colon cancer cells.
Sack, U., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Scudiero, D., Selby, M., Aumann, J., Lemos, C., Fichtner, I., Schlag, P.M., Shoemaker, R.H. and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Molecular Biology of the Cell 22 (18): 3344-3354. September 2011

Novel effect of antihelminthic niclosamide on S100A4-mediated metastatic progression in colon cancer.
Sack, U., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Scudiero, D., Selby, M., Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Lemm, M., Fichtner, I., Schlag, P.M., Shoemaker, R.H. and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Journal of the National Cancer Institute 103 (13): 1018-1036. 6 July 2011

Intervening in beta-catenin signaling by sulindac inhibits S100A4-dependent colon cancer metastasis.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Arlt, F., Smith, J., Sack, U., Herrmann, P., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Lemm, M., Fichtner, I., Shoemaker, R.H. and Schlag, P.M.
Neoplasia 13 (2): 131-144. February 2011

Identification of Y-box binding protein 1 as a core regulator of MEK/ERK pathway-dependent gene signatures in colorectal cancer cells.
Juerchott, K., Kuban, R.J., Krech, T., Blüthgen, N. ORCID: https://orcid.org/0000-0002-0171-7447, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Friese, C., Kielbasa, S.M., Ungethuem, U., Lund, P., Knoesel, T., Kemmner, W. ORCID: https://orcid.org/0000-0002-1494-7225, Morkel, M. ORCID: https://orcid.org/0000-0002-2553-9999, Fritzmann, J., Schlag, P.M., Birchmeier, W. ORCID: https://orcid.org/0000-0003-1173-0829, Krueger, T., Sperling, S. ORCID: https://orcid.org/0000-0002-7135-3298, Sers, C., Royer, H.D., Herzel, H. and Schaefer, R.
PLoS Genetics 6 (12): e1001231. 2 December 2010

Activation of the CMV-IE promoter by hyperthermia in vitro and in vivo: biphasic heat induction of cytosine deaminase suicide gene expression.
Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Aumann, J., Fichtner, I., Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Schlag, P.M. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Molecular Biotechnology 46 (2): 197-205. October 2010

Jet-injection of short hairpin RNA-encoding vectors into tumor cells.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Lage, H.
Methods in Molecular Biology 629 : 123-139. 2010

MACC1, a newly identified key regulator of HGF-MET signaling, predicts colon cancer metastasis.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Arlt, F., Schwabe, H., Smith, J., Fichtner, I., Birchmeier, W. ORCID: https://orcid.org/0000-0003-1173-0829 and Schlag, P.M.
Nature Medicine 15 (1): 59-67. January 2009

Nonviral jet-injection technology for intratumoral in vivo gene transfer of naked DNA.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Fichtner, I., Schlag, P.M. and Stein, U.S. ORCID: https://orcid.org/0000-0001-7006-282X
Methods in Molecular Biology 542 : 195-208. 2009

Novel jet-injection technology for nonviral intratumoral gene transfer in patients with melanoma and breast cancer.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Siegel, R., Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Knoesel, T., Dietel, M., Bembenek, A., Aumann, J., Schleef, M., Baier, R., Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Schlag, P.M.
Clinical Cancer Research 14 (22): 7545-7553. 15 November 2008

Complete in vivo reversal of the multidrug resistance phenotype by jet-injection of anti-MDR1 short hairpin RNA-encoding plasmid DNA.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stege, A., Kaszubiak, A., Fichtner, I. and Lage, H.
Molecular Therapy 16 (1): 178-186. January 2008

Lokale nicht-virale Gentherapie in kutanen Metastasen von Mammakarzinom und Melanom: Ergebnisse einer Phase-I-Studie mittels Jet-Injektion nackter DNA.
Siegel, R., Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Knoesel, T., Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Schlag, P.M. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Chirurgisches Forum 2008 37 : 131-132. 2008

Heat-inducible in vivo gene therapy of colon carcinoma by human mdr1 promoter-regulated tumor necrosis factor-alpha expression.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Arlt, F., Fichtner, I., Aumann, J., Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Schlag, P.M.
Molecular Cancer Therapeutics 6 (1): 236-243. January 2007

The metastasis-associated gene S100A4 is a novel target of beta-catenin/T-cell factor (TCF) signaling in colon cancer.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Arlt, F., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Smith, J., Waldman, T., Harris, E.D., Mertins, S.D., Heizmann, C.W., Allard, D., Birchmeier, W. ORCID: https://orcid.org/0000-0003-1173-0829, Schlag, P.M. and Shoemaker, R.H.
Gastroenterology 131 (5): 1486-1500. November 2006

Reversal of ABC transporter-dependent multidrug resistance in cancer: A realistic option?
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
American Journal of Cancer 5 (5): 285-297. September 2006

Uptake, biodistribution, and time course of naked plasmid DNA trafficking after intratumoral in vivo jet injection.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Minow, T., Martin, R. ORCID: https://orcid.org/0000-0001-5600-7525, Fichtner, I., Schlag, P.M. and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Human Gene Therapy 17 (6): 611-624. 15 June 2006

"Multidrug-Resistenz". Zellulaere Transportprobleme und ihre Konsequenzen ["Multidrug resistance". Cellular transport problems and their consequences].
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Schlag, P.M.
Paediatrische Praxis 68 : 11-19. 1 January 2006

Nonviral jet-injection gene transfer for efficient in vivo cytosine deaminase suicide gene therapy of colon carcinoma.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Fichtner, I., Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Aumann, J., Arlt, F. and Schlag, P.M.
Molecular Therapy 12 (6): 1176-1184. 29 September 2005

"Multidrug-Resistenz". Zellulaere Transportprobleme und ihre Konsequenzen ["Multidrug resistance". Cellular transport problems and their consequences].
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Schlag, P.M.
Taegliche Praxis 46 (1): 125-133. 1 January 2005

Use of the nuclease inhibitor aurintricarboxylic acid (ATA) for improved non-viral intratumoral in vivo gene transfer by jet-injection.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Siegel, R., Fichtner, I. and Schlag, P.M.
Journal of Gene Medicine 7 (4): 477-485. 1 January 2005

YB-1 facilitates basal and 5-fluorouracil-inducible expression of the human major vault protein (MVP) gene.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Bergmann, S., Scheffer, G.L., Scheper, R.J., Royer, H.D., Schlag, P.M. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Oncogene 24 (22): 3606-3618. 1 January 2005

Reversal of P-glycoprotein mediated vincristine resistance of L1210/VCR cells by analogues of pentoxifylline - A QSAR study.
Kupsakova, I., Rybar, A., Docolomansky, P., Drobna, Z., Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Barancik, M. and Breier, A.
European Journal of Pharmaceutical Sciences 21 (2-3): 283-293. 1 January 2004

Stability analysis for long-term storage of naked DNA: impact on nonviral in vivo gene transfer.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Voss, C., Schmidt, T., Schleef, M. and Schlag, P.M.
Analytical Biochemistry 318 (2): 230-235. 15 July 2003

Lipoplexes with alkylphospholipid as new helper lipid for efficient in vitro and in vivo gene transfer in tumor therapy.
Zeisig, R., Ress, A., Fichtner, I. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Cancer Gene Therapy 10 (4): 302-311. April 2003

Functional haplotypes of the RET proto-oncogene promoter are associated with Hirschsprung disease (HSCR).
Fitze, G., Appelt, H., Koenig, I.R., Goergens, H., Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Gossen, M. ORCID: https://orcid.org/0000-0002-1761-4063, Schreiber, M., Ziegler, A., Roesner, D. and Schackert, H.K.
Human Molecular Genetics 12 (24): 3207-3214. 1 January 2003

YB-1 as a cell cycle-regulated transcription factor facilitating cyclin A and cyclin B1 gene expression.
Juerchott, K., Bergmann, S., Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Janz, M. ORCID: https://orcid.org/0000-0002-1127-0044, Manni, I., Piaggio, G., Fietze, E., Dietel, M. and Royer, H.D.
Journal of Biological Chemistry 278 (30): 27988-27996. 1 January 2003

Intratumoral low-volume jet-injection for efficient nonviral gene transfer.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Fichtner, I., Voss, C., Schmidt, T., Schleef, M., Nellessen, T. and Schlag, P.M.
Molecular Biotechnology 21 (2): 105-115. 1 June 2002

Pentoxifylline influences drug transport activity of P-glycoprotein and decreases mdr1 gene expression in multidrug resistant mouse leukemic L1210/VCR cells.
Drobna, Z., Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Barancik, M. and Breier, A.
General Physiology and Biophysics 21 (1): 103-109. March 2002

Impact of BCRP/MXR, MRP1 and MDR1/P-glycoprotein on thermoresistant variants of atypical and classical multidrug resistant cancer.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Lage, H., Jordan, A., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Bates, S.E., Litman, T., Hohenberger, P. and Dietel, M.
International Journal of Cancer 97 (6): 751-760. 1 January 2002

Use of the human MDR1 promoter for heat-inducible expression of therapeutic genes.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Schlag, P.M.
International Journal of Cancer 98 (2): 291-296. 1 January 2002

Strategien zur Gentherapie von Tumorerkrankungen [Gene therapy strategies for tumor diseases].
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Schlag, P.M.
Chirurgische Praxis 60 : 19-26. 2002

Hyperthermia-induced nuclear translocation of transcription factor YB-1 leads to enhanced expression of multidrug resistance-related ABC transporters.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Juerchott, K., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Bergmann, S., Schlag, P.M. and Royer, H.D.
Journal of Biological Chemistry 276 (30): 28562-28569. 1 January 2001

In vivo Gentransfer nackter DNA in xenotransplantierte Kolonkarzinome in der Nude Maus mit Hilfe der Jet-Injektion [In vivo gene transfer of naked DNA into xenotransplanted colon carcinoma by jet-injection].
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Fichtner, I. and Schlag, P.M.
Chirurgisches Forum 30 : 69-72. 1 January 2001

Nonviral in vivo gene delivery into tumors using a novel low volume jet-injection technology.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Fichtner, I., Malcherek, L., Lemm, M. and Schlag, P.M.
Gene Therapy 8 (3): 173-180. 1 January 2001

Cloning and initial analysis of the human multidrug resistance-related MVP/LRP gene promoter.
Lange, C., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Schwabe, H. and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Biochemical and Biophysical Research Communications 278 (1): 125-133. 11 November 2000

In vivo gene transfer by low-volume jet injection.
Cartier, R., Ren, S.V., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Lewis, A., Schlag, P.M., Li, M. and Furth, P.A.
Analytical Biochemistry 282 (2): 262-265. 1 July 2000

mdr1 promoter-driven tumor necrosis factor-alpha expression for a chemotherapy-controllable combined in vivo gene therapy and chemotherapy of tumors.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Fichtner, I., Alexander, M., Shoemaker, R.H. and Schlag, P.M.
Cancer Gene Therapy 7 (6): 893-900. 1 June 2000

High-copy cDNA amplification of minimal total RNA quantities for gene expression analyses.
Schwabe, H., Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Molecular Biotechnology 14 (2): 165-172. 1 February 2000

GLI gene expression in bone and soft tissue sarcomas of adult patients correlates with tumor grade.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Eder, C., Karsten, U., Haensch, W., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Schlag, P.M.
Cancer Research 59 : 1890-1895. 1 January 1999

Hyperthermia for treatment of rectal cancer: evaluation for induction of multidrug resistance gene (mdr1) expression.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Rau, B., Wust, P., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Schlag, P.M.
International Journal of Cancer 80 : 5-12. 1 January 1999

Cytokine-mediated reversal multidrug resistance.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Cytotechnology 27 : 271-282. 1 January 1998

IL-2 gene transfer for chemosensitization of multidrug-resistant human colon carcinoma cells.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Shoemaker, R.H. and Schlag, P.M.
1 January 1998

In vivo evaluation of a cytostatic drug-inducible vector for the expression of TNF-alpha.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Fichtner, I., Shoemaker, R.H., Alexander, M. and Schlag, P.M.
Proceedings of the American Association of Cancer Research 39 : 520. 1 January 1998

In vivo evaluation of a drug-inducible vector system for the combined gene- and chemotherapy of cancer.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Fichtner, I., Naundorf, H., Alexander, M., Shoemaker, R.H. and Schlag, P.M.
Advances in Experimental Medicine and Biology 451 : 139-144. 1 January 1998

Reversal of multidrug resistance by cytokines - evaluation of an alternative therapeutic approach in human tumors.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Rau, B., Kettelhack, C. and Schlag, P.M.
Proceedings of the American Association of Cancer Research 39 : 509. 1 January 1998

Development and characterisation of novel human multidrug resistant mammary carcinoma lines in vitro and in vivo.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Lemm, M., Naundorf, H. and Fichtner, I.
International Journal of Cancer 72 : 885-891. 1 January 1997

Development and characterization of novel multidrug resistant breast cancer lines.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Lemm, M., Naundorf, H. and Fichtner, I.
Proceedings of the American Association of Cancer Research 38 : 484. 1 January 1997

Diverse effects of tumor necrosis factor a on expression of the multidrug resistance-associated genes LRP and MRP.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Laurencot, C.M., Scheffer, G.L., Scheper, R.J. and Shoemaker, R.H.
Proceedings of the American Association of Cancer Research 38 : 480. 1 January 1997

Employment of the mdr1 promoter for the chemotherapy-inducible expression of therapeutic genes in cancer gene therapy.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Wendt, J. and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Gene Therapy 4 : 544-552. 1 January 1997

In situ RT-PCR using fluorescence-labeled primers.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Wendt, J. and Schild, T.A.
Biotechniques 23 : 194-198. 1 January 1997

Modulation of MDR1 expression by cytokines in human colon carcinoma cells: an approach for reversal of multidrug.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Shoemaker, R.H.
Biotherapy in Cancer 1 : 53-53. 1 January 1997

Tumor necrosis factor-alpha and expression of the multidrug resistance-associated genes LRP and MRP.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Laurencot, C.M., Scheffer, G.L., Scheper, R.J. and Shoemaker, R.H.
Journal of the National Cancer Institute 89 : 807-813. 1 January 1997

Drug-inducible vector for the conditional expression of the human TNFalpha gene.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Wendt, J. and Shoemaker, R.H.
Proceedings of the American Association of Cancer Research 37 : 350. 1 January 1996

Modulation of mdr1 expression by cytokines in human colon carcinoma cells: an approach for reversal of multidrug resistance.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Shoemaker, H.
British Journal of Cancer 74 : 1384-1391. 1 January 1996

Reversal of multidrug resistance by transduction of cytokine genes into human colon carcinoma cells.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Shoemaker, R.H.
Journal of the National Cancer Institute 88 : 1383-1392. 1 January 1996

Vincristine induction of mutant and wild-type human multidrug-resitance promoters is cell- type-specific and dose-dependent.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Shoemaker, R.H.
Journal of Cancer Research and Clinical Oncology 122 : 275-282. 1 January 1996

Gene transfer of human TNFalpha into glioblastoma cells permits modulation of mdr1 expression and potentiation of chemosensitivity.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Pfeil, D.
International Journal of Cancer 61 (6): 832-839. 1 January 1995

Influence of retrovirally transduced human tumor-necrosis-factor-alpha on the expression of C-myc, k-ras, C-jun, p53, tgf-alpha, and cea in human colon-carcinoma cell-lines.
Uckert, W., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Hummel, O.
International Journal of Oncology 6 : 1027-1031. 1 January 1995

Liposome mediated transfer of marker and cytokine genes into rat and human glioblastoma cells in vitro and in vivo.
Reszka, R., Zhu, J., Weber, F., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Greferath, R. and Dyballa, S.
Journal of Liposome Research 5 : 149-167. 1 January 1995

Conditional expression of human TNF-alpha: a system for inducible cytotoxicity.
Sparmann, G., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Guenzburg, W.H., Uckert, W. and Salmons, B.
International Journal of Cancer 59 : 103-107. 1 January 1994

Detektion des P-Glycoproteins mit dem Antikoerper Anti-P-Glycoprotein 170-180 (Klon JSB-1): Modulation der Multidrug Resistenz in Zytokin-Gen-transfizierten Glioblastomzellen.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Boehringer Mannheim Biochemica Information 92 : 22-23. 1 January 1994

Influence of cytokines on mdr1 expression in human colon carcinoma cell lines: increased cytotoxicity of MDR relevant drugs.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Journal of Cancer Research and Clinical Oncology 120 : 471-478. 1 January 1994

RNA analysis using miniprep RNA in reverse transcriptase PCR.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Eder, C.
Biotechniques 17 : 674-675. 1 January 1994

Point mutations in the mdr1 promoter of human osteosarcomas are associated with in vitro responsiveness to multidrug resistance relevated drugs.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Wunderlich, V.
European Journal of Cancer 30A (10): 1541-1545. 1994

Rapid method of total RNA mini-preparation from eucaryotic cells.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Uckert, W.
Nucleic Acids Research 21 (7): 1682. 11 April 1993

Retrovirus-mediated gene transfer of tumor necrosis factor alpha into colon carcinoma cells generates a growth inhibition.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Fichtner, I. and Uckert, W.
Anticancer Research 13 : 1565-1574. 1 January 1993

Book Section

Minicircle-based vectors for nonviral gene therapy: in vitro characterization and in vivo application.
Kobelt, D. ORCID: https://orcid.org/0000-0002-9373-0648, Aumann, J., Schleef, M., Schmeer, M., Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Schlag, P.M. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
In: Minicircle and miniplasmid DNA vectors: the future of nonviral and viral gene transfer. Wiley, 177-188. ISBN 978-3-527-32456-9 17 April 2013

Needleless jet injection of naked DNA for nonviral in vivo gene transfer.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
In: DNA-Pharmaceuticals: Formulation and Delivery in Gene Therapy, DNA Vaccination and Immunotherapy. Wiley-VCH, 133-143. ISBN 9783527311873 25 August 2005

Tumorgenese.
Schlag, P.M., Estevez-Schwarz, L., Kemmner, W. ORCID: https://orcid.org/0000-0002-1494-7225, Schumacher, K. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
In: Chirurgische Onkologie. Thieme, Stuttgart [u.a.], 2-17. ISBN 3-13-126111-0 1 January 2002

Chemotherapy-inducible vector for gene therapy of cancer.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Shoemaker, R.H. and Schlag, P.M.
In: Gene Therapy of Cancer : Methods and Protocols ; 35. Methods in Molecular Medicine ; 35 . Humana Press, Totowa, 371-392. 1 January 2000

Large and small scale RNA preparations from eukaryotic cells.
Uckert, W., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
In: RNA Isolation and Characterization Protocols. Methods in Molecular Biology ; 86 . Humana Press, Totowa,NJ, 7-14. 1 January 1998

Retroviral transduction of the human TNF alpha gene into tumour cells generates a growth inhibitory effect.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Huth, J., Sparmann, G. and Uckert, W.
In: European Biotechnology Today. INTERCEPT Ltd., Andover, 209-216. 1 January 1992

Book

Current strategies in cancer gene therapy.
Walther, W., ed.
Recent Results in Cancer Research, 209 . Springer. ISBN 978-3-319-42932-8 2016

Gene Therapy of Cancer : Methods and Protocols.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Methods in Molecular Medicine ; 35 . Humana Press, Totowa. 1 January 2000

Patent

Process for treating tumors with cytotoxic substances.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Schlag, P.M.
US6,582,690. 24 June 2003

Verwendung des humanen LRP/MVP Promotors fuer einen Therapie-induzierbaren Vektor [Use of the human LRP/MVP promotor of a vector that can be induced by therapy].
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Lange, C., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Schlag, P.M.
DE10055383A1 ; EP1332219 ; WO0238188. 29 May 2002

Mittel zum nichtviralen Transfer von DNS in eukaryotische Zellen.
Zeisig, R. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
DE19959690A1. 8 June 2000

Verwendung von Cytokinen und cytotoxischen Substanzen in einem neuen Verfahren zur Tumorbehandlung [Use of cytokines and cytotoxic substances in a new method to treat tumors].
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Schlag, P.M.
EP0832653 ; EP0935468 ; WO9811911. 1 April 1998

Vektor zur Expression von therapeutisch relevanten Genen [Vector for the expression of therapy-relevant genes].
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
DE4238778A1 ; DE4238778C2 ; EP0670904 ; US 5,968,735. 19 May 1994

Review

Choosing wisely - Preclinical test models in the era of precision medicine.
Klinghammer, K. ORCID: https://orcid.org/0000-0001-6425-4833, Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Hoffmann, J. ORCID: https://orcid.org/0000-0003-3880-1658
Cancer Treatment Reviews 55 : 36-45. April 2017

Vectors and strategies for nonviral cancer gene therapy.
Pahle, J. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Expert Opinion on Biological Therapy 16 (4): 443-461. April 2016

Current status of gene therapy for cancer.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Schlag, P.M.
Current Opinion in Oncology 25 (6): 659-664. November 2013

MACC1 - more than metastasis? Facts and predictions about a novel gene.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Dahlmann, M. ORCID: https://orcid.org/0000-0002-0036-5283 and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Journal of Molecular Medicine 88 (1): 11-18. January 2010

Heat-responsive gene expression for gene therapy.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Advanced Drug Delivery Reviews 61 (7-8): 641-649. 2 July 2009

Low-volume jet injection for efficient nonviral in vivo gene transfer.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231, Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Fichtner, I. and Schlag, P.M.
Molecular Biotechnology 28 (2): 121-128. 1 January 2004

Viral vectors for gene transfer. A review of their use in the treatment of human diseases.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Drugs 60 (2): 249-271. 1 January 2000

Therapeutic genes for cancer gene therapy.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Molecular Biotechnology 13 (1): 21-28. November 1999

Cell type specific and inducible promoters for vectors in gene therapy as an approach for cell targeting.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Journal of Molecular Medicine 74 : 379-392. 1 January 1996

Targeted vectors for gene therapy of cancer and retroviral infections.
Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X
Molecular Biotechnology 6 : 267-286. 1 January 1996

Retrovirus-mediated gene transfer in cancer therapy.
Uckert, W. and Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231
Pharmacology & Therapeutics 63 : 323-347. 1 January 1994

Letter

MACC1 controls Met: What a difference an Sp1 site makes.
Stein, U. ORCID: https://orcid.org/0000-0001-7006-282X, Smith, J., Walther, W. ORCID: https://orcid.org/0000-0003-2884-0231 and Arlt, F.
Cell Cycle 8 (15): 2467-2469. 1 August 2009