title: Management of malignant pleural effusion by suicide gene therapy in advanced stage lung cancer: a case series and literature review.
abstract: Gene therapy can be defined as the transfer of genetic material into a cell for therapeutic purposes. Cytosine deaminase (CD) transferred into tumor cells by an adenoviral vector (Ad.CD), can convert the antifungal drug fluorocytosine (5-FC) to the antimetabolite 5-fluorouracil (5-FU), which kills not only the transfected tumor cells but also their neighbors by the so-called 'bystander effect'. After testing a protocol for Ad.CD transfer and lung tumor burden control in a Lewis mouse model, we used this technique in the management of lung cancer patients with malignant pleural effusion (MPE): two cases are presented investigating the possible enhancement of anticancer effect in both non-small-cell lung cancer (NSCLC) and small-cell lung cancer (SCLC) by local activation of the pro-drug 5-FC. Results were discussed in parallel to a literature review on the topic. 5-FC and Ad.CD were administered intratumorally to Lewis mouse lung carcinoma and the effect was monitored by tumor size and electromicroscopy. Two patients with advanced stage lung cancer (1SCLC, 1NSCLC), which developed MPE during first-line treatment were administered 10(12) plaque-forming unit (pfu) Ad.CD by intrapleural instillation, in two doses (day 1 and day 7). Instillation was performed when the pleural fluid was ≤200 ml. In addition, they received 5-FC 500 mg four times daily for 14 days. Lung tumor regression and successful transfer of adenoviral particles were observed in treated animals. Patients presented complete regression of pleural effusion as monitored by computerized tomography scan. Neutrapenia and anemia were the most severe adverse effect presented (grade III/grade IV 100%). The increased toxicity followed by the intrapleural gene therapy indicates the augmentation of anticancer effect of transformed pro-drug 5-FC to active 5-FU. The obtained data indicate that intrapleural gene therapy may be a useful tool, adjunct to chemotherapy, in the management of MPE related to lung cancer.
authors: Pulmonary Department-Oncology Unit, 'G. Papanikolaou' General Hospital, Aristotle University of Thessaloniki, Greece. pzarog@hotmail.com
authors: P
authors: P
authors: Zarogoulidis
authors: E
authors: E
authors: Chatzaki
authors: W
authors: W
authors: Hohenforst-Schmidt
authors: E P
authors: EP
authors: Goldberg
authors: G
authors: G
authors: Galaktidou
authors: T
authors: T
authors: Kontakiotis
authors: N
authors: N
authors: Karamanos
authors: K
authors: K
authors: Zarogoulidis
mesh_terms: D000256:Adenoviridae / Q000235:genetics / Q000378:metabolism; D000368:Aged; D000740:Anemia / Q000139:chemically induced; D000818:Animals; D000964:Antimetabolites, Antineoplastic / Q000378:metabolism / Q000627:therapeutic use; D024201:Bystander Effect; D002289:Carcinoma, Non-Small-Cell Lung / Q000188:drug therapy / Q000473:pathology / Q000628:therapy; D043525:Cytosine Deaminase / Q000008:administration & dosage / Q000235:genetics / Q000378:metabolism*; D005437:Flucytosine / Q000378:metabolism / Q000627:therapeutic use; D005472:Fluorouracil / Q000009:adverse effects / Q000378:metabolism / Q000627:therapeutic use*; D041722:Genes, Transgenic, Suicide; D015316:Genetic Therapy / Q000379:methods*; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy / Q000473:pathology / Q000628:therapy*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008875:Middle Aged; D060787:Neoplasm Grading; D009367:Neoplasm Staging; D009503:Neutropenia / Q000139:chemically induced; D016066:Pleural Effusion, Malignant / Q000188:drug therapy / Q000473:pathology / Q000628:therapy*; D011355:Prodrugs / Q000008:administration & dosage; D016016:Proportional Hazards Models; D055752:Small Cell Lung Carcinoma / Q000188:drug therapy / Q000473:pathology / Q000628:therapy; D014057:Tomography, X-Ray Computed
chemical_list: D000964:Antimetabolites, Antineoplastic; D011355:Prodrugs; D005437:Flucytosine; D043525:Cytosine Deaminase; D005472:Fluorouracil