Personalized functional profiling using ex-vivo patient-derived spheroids points out the potential of an antiangiogenic treatment in a patient with a metastatic lung atypical carcinoid.

Lung carcinoids are neuroendocrine tumors representing 1 to 2% of lung cancers. This study outlines the case of a patient with a metastatic lung atypical carcinoid who presented with a pleural effusion and progression of liver metastases after developing resistance to conventional treatments. Personalized functional profiling (PFP), i.e. drug screening, was performed in ex-vivo spheroids obtained from the patient's liver metastasis to identify potential therapeutic options. The drug screening results revealed cediranib, an antiangiogenic drug, as a hit drug for this patient, from a library of 66 Food and Drug Administration (FDA)-approved and investigational drugs. Based on the PFP results and the reported evidence of clinical efficacy of bevacizumab and capecitabine combination in gastro-intestinal neuroendocrine tumors, this combination was given to the patient. Four months later, the pleural effusion and pleura carcinosis regressed and the liver metastasis did not progress. The patient experienced 2 years of a stable disease under the PFP-guided personalized treatment.

Digital Communication in Visceral Medicine: Regulatory Framework for Digital Communication.

BACKGROUND: Germany has seen rapid development in the digitization of medicine in recent years. Especially, the CO-VID-19 pandemic has dramatically accelerated this process. Nevertheless, it is accompanied by legal innovations that promote the application of digital tools as well as create respective remuneration options. Ultimately, this continued implementation of digital innovations and telemedicine approaches will lead to the improvement of care and the more efficient provision of medical services. SUMMARY: The article primarily describes the development and current status of digitization using 2 key examples of telemedicine and digital innovations - video consultation and digital health applications. Starting with the liberalization of remote treatment options, video consultation gained many users, especially during the COVID pandemic. The introduction of digital health applications with the possibility of reimbursement by the statutory health insurance funds has put Germany in a leading position in international comparison in this respect. KEY MESSAGES: Digitization in healthcare offers enormous opportunities both to professionals working in the healthcare sector and to patients. However, in order to successfully use digital tools in practice, the legal, organizational, and financial framework must be clarified. All medical professionals are well advised to further qualify themselves in this area in order to keep pace with developments.

Evaluation of health research capacity strengthening trainings on individual level: validation of a questionnaire.

RATIONALE, AIMS AND OBJECTIVES: In the field of global health, research capacity strengthening is becoming a common concept for defining and improving research competencies on individual, organizational, national and supranational level. However, HRCS activities often lack evaluation procedures to measure their impact and to ensure their quality. The aim of this study was to develop and validate a short questionnaire to evaluate trainings in the field of health research capacity strengthening (HRCS). METHOD: The questionnaire was developed by an interdisciplinary research team and tested in four different training settings at the Mbeya Medical Research Center and Mbeya Referral Hospital, Tanzania. Construct validity of the questionnaire was tested based on 97 responses of the participants of four trainings. RESULTS: Iterative checking of Cronbach's alpha of the subscales and exploratory factor analysis revealed a four-factor solution that differed from the original structure and subscales of the questionnaire. The instrument was adapted accordingly and consists now of four subscales with 19 items, three global impression items, and open questions for participants' comments and recommendations. CONCLUSIONS: The result of the study is a short, validated questionnaire for the evaluation of HRCS trainings on the individual level. The tool can be applied both to measure the short-term effects of international health research capacity trainings and to ensure their quality. In the future, after collecting larger sample sizes, a confirmatory factor analysis should be done to further support the four factors.

Inhibition of telomerase induces alternative lengthening of telomeres during human esophageal carcinogenesis.

Immortalization is an important step toward the malignant transformation of human cells and is critically dependent upon telomere maintenance. Two mechanisms are known to maintain human telomeres. The process of telomere maintenance is either mediated through activation of the enzyme telomerase or through an alternative mechanism of telomere lengthening called alternative lengthening of telomeres (ALT). Whereas 85% of all human tumors show reactivation of telomerase, the remaining 15% are able to maintain telomeres via ALT. Telomerase inhibitors are already investigated in clinical trials, although the regulation as well as potential coexistence and redundancy of both telomere maintenance mechanisms during distinct steps of carcinogenesis are poorly understood. Herein, we demonstrate that telomerase activity and ALT alternate in a cell cycle dependent fashion in human esophageal epithelial cells, and can coexist in a genetically defined model of oral-esophageal squamous carcinogenesis. Moreover, we show that immortalized premalignant cells as well as cancer cells are able to switch from telomerase activation to ALT upon inhibition of telomerase. This indicates that cancer cells treated with telomerase inhibitors can use alternative and adaptive ways to maintain their telomeres and thereby escape telomere-based therapeutic strategies.

Inhibitor of differentiation proteins do not influence prognosis of biliary tract cancer.

AIM: To investigate the expression and clinical relevance of inhibitor of differentiation (ID) proteins in biliary tract cancer. METHODS: ID protein expression was analyzed in 129 samples from patients with advanced biliary tract cancer (BTC) (45 extrahepatic, 50 intrahepatic, and 34 gallbladder cancers), compared to normal controls and correlated with clinical an pathological parameters. RESULTS: ID1-3 proteins are frequently overexpressed in all BTC subtypes analyzed. No correlation between increased ID protein expression and tumor grading, tumor subtype or treatment response was detected. Survival was influenced primary tumor localization (extrahepatic vs intrahepatic and gall bladder cancer, OS 1.5 years vs 0.9 years vs 0.7 years, P = 0.002), by stage at diagnosis (OS 2.7 years in stage I vs 0.6 years in stage IV, P < 0.001), resection status and response to systemic chemotherapy. In a multivariate model, ID protein expression did not correlate with clinical prognosis. Nevertheless, there was a trend of shorter OS in patients with loss of cytoplasmic ID4 protein expression (P = 0.076). CONCLUSION: ID protein expression is frequently deregulated in BTC but does not influence clinical prognosis. Their usefulness as prognostic biomarkers in BTC is very limited.

Supporting self-management of pain in cancer patients: methods and lessons learned from a randomized controlled pilot study.

PURPOSE OF THE RESEARCH: The purposes of this paper are to describe the methods used and the knowledge gained during a pilot study that evaluated the effects of a self-management intervention for cancer pain, as well as the adaptations that were made for a larger clinical trial. METHODS AND SAMPLE: In a randomized controlled trial, the adapted German version of the PRO-SELF(©) Plus Pain Control Program (PCP), a 10-week intervention to support self-management of pain in adult oncology outpatients and their family caregivers, was compared to attention control. Primary endpoints were average and worst pain measured at 6, 10, 14, and 22 weeks after enrollment. KEY RESULTS: A total of 39 patients (19 intervention, 20 control) were recruited over 18 months. During the study, inclusion criteria were expanded. Furthermore, the structured timing of the intervention visits was too static for a dynamic symptom like cancer pain. The intervention was expanded to include symptoms that severely impacted pain self-management including chemotherapy-induced nausea and vomiting. CONCLUSIONS: Apart from the provision of information and skills building, coaching cancer patients across a complex treatment is an important function of an intervention to support pain self-management. The pilot study proved to be highly useful in order to adapt planned study procedures, to balance burden and benefit for participants, and to customize the intervention to patients' needs and abilities in order to enhance feasibility and effectiveness. Findings from this pilot study will be fully integrated in a larger randomized controlled trial. CLINICAL TRIAL REGISTRATION NUMBER: NCT00920504.

Results of a randomized controlled pilot study of a self-management intervention for cancer pain.

PURPOSE OF THE RESEARCH: This paper reports findings from a randomized controlled pilot study evaluating the PRO-SELF Plus Pain Control Program, a U.S.-developed cancer pain self-management intervention, regarding feasibility and effect sizes in a German patient sample. METHODS AND SAMPLE: Thirty-nine German oncology outpatients were randomized to intervention (n = 19) and control (n = 20) groups. The intervention group received the PRO-SELF Plus Pain Control Program in 6 visits and 4 phone calls a 10-week period. The control group received standard education and care. The intervention employed three key strategies: information provision, skills building, and nurse coaching. Primary outcomes were changes in average and worst pain intensity. Secondary outcomes included changes in pain-related knowledge, opioid intake, and self-efficacy. Data were collected at enrollment, then at 6, 10, 14, and 22 weeks. KEY RESULTS: The group-by-time effect showed a statistically significant increase in knowledge (week 10: p = 0.04; week 22: p < 0.01). Despite slight reductions in average and worst pain, no statistically significant changes were found for pain, opioid intake, or self-efficacy. CONCLUSIONS: This study is the first to evaluate and demonstrate the feasibility of a U.S.-developed cancer pain self-management intervention in a German patient population. Pain self-management related knowledge improved significantly and effect sizes for pain reduction were determined. Findings from this pilot RCT provide the basis for planning a larger RCT. CLINICAL TRIAL REGISTRATION NUMBER: NCT00920504.

A systematic evaluation of content, structure, and efficacy of interventions to improve patients' self-management of cancer pain.

CONTEXT: Cancer pain continues to be extensively undertreated, despite established guidelines. Although the efficacy of interventions that support patients' self-management of cancer pain has been demonstrated in several studies, the most effective components of these interventions remain unknown. OBJECTIVES: The purpose of this review of experimental and quasi-experimental studies was to systematically describe the structure and content components, as well as the efficacy of various components, of interventions designed to improve patients' self-management of cancer pain. METHODS: A systematic review of the literature was done that supplemented the 2009 meta-analysis of Bennett et al. Intervention components were categorized using content analysis. The intervention components were compared based on their calculated largest effect sizes (ESs) within each study (i.e., Hedges G(u) for between-group differences in pain intensity scores). RESULTS: Based on 34 publications (i.e., 24 interventions), seven structure and 16 content components were identified. In 11 studies with statistically significant ESs, the largest ES within each study ranged from -1.87 to -0.44, which represented clinically meaningful effects. No single component was found to have a discernable influence on ES. CONCLUSION: This analysis provides researchers and clinicians with a detailed overview of the various structural and content components, as well as various combinations that were tested in intervention studies to improve cancer pain management. However, because of a variety of limitations, the most efficacious intervention components or combination of components remain to be determined in future studies.

Impact of preoperative targeted therapy on postoperative complications after resection of colorectal liver metastases.

PURPOSE: The impact of chemotherapy (CTx) on morbidity after liver resection for colorectal metastases (CRC-LM) has been increasingly investigated during recent years. Biologic agents like bevacizumab (BEV) or cetuximab (CET) are now added as "targeted therapy" (TT), also in neoadjuvant settings. Initial series could demonstrate the safety of those regimens in liver resection but data are still scarce. We evaluated the impact of CTx with BEV or CET (CTx + TT) on perioperative morbidity and mortality. METHODS: Two hundred thirty-seven patients who underwent liver resections for CRC-LM after chemotherapy before surgery since 1999 were included. One hundred eighty-five patients (78%) had preoperative CTx regimen without biologic agents (fluoropyrimidine-, oxaliplatin-, or irinotecan-based) and 52 (22%) had CTx + TT (39 BEV, 11 CET, 2 CET/BEV). After preoperative CTx + TT, a time interval of at least 4-6 weeks and a residual liver volume of >35% before surgery were required. RESULTS: Hemihepatectomy or more was performed in about half of the patients. The median amount of intraoperatively transfused blood was 0 ml in both groups (p = 0.34). Overall mortality was 1.7% and slightly elevated in patients with CTx + TT (3.8% vs. 1.1%, p = 0.17). Any complication occurred in (CTx + TT vs. CTx) 52% and 46%, respectively (p = 0.47). The rates of liver failure (9.6% vs. 9.7%, p = 0.98), infectious complications such as wound infection (19% vs. 16%, p = 0.62) and abdominal abscess (8% vs. 6.5%, p = 0.71), as well as the rate of relaparotomies (11.5% vs. 7.0%, p = 0.29) showed no significant differences between the groups with TT or without. In multivariate analyses, neither type nor duration of CTx nor the time interval between CTx and surgery showed any influence on complication rates. CONCLUSIONS: Our data confirm the safety of targeted therapy before liver resection for CRC-LM. This effect may in part be due to our treatment policy (time interval to resection and residual liver volume) after intensive preoperative CTx.

Occurrence of multipolar mitoses and association with Aurora-A/-B kinases and p53 mutations in aneuploid esophageal carcinoma cells.

BACKGROUND: Aurora kinases and loss of p53 function are implicated in the carcinogenesis of aneuploid esophageal cancers. Their association with occurrence of multipolar mitoses in the two main histotypes of aneuploid esophageal squamous cell carcinoma (ESCC) and Barrett's adenocarcinoma (BAC) remains unclear. Here, we investigated the occurrence of multipolar mitoses, Aurora-A/-B gene copy numbers and expression/activation as well as p53 alterations in aneuploid ESCC and BAC cancer cell lines. RESULTS: A control esophageal epithelial cell line (EPC-hTERT) had normal Aurora-A and -B gene copy numbers and expression, was p53 wild type and displayed bipolar mitoses. In contrast, both ESCC (OE21, Kyse-410) and BAC (OE33, OE19) cell lines were aneuploid and displayed elevated gene copy numbers of Aurora-A (chromosome 20 polysomy: OE21, OE33, OE19; gene amplification: Kyse-410) and Aurora-B (chromosome 17 polysomy: OE21, Kyse-410). Aurora-B gene copy numbers were not elevated in OE19 and OE33 cells despite chromosome 17 polysomy. Aurora-A expression and activity (Aurora-A/phosphoT288) was not directly linked to gene copy numbers and was highest in Kyse-410 and OE33 cells. Aurora-B expression and activity (Aurora-B/phosphoT232) was higher in OE21 and Kyse-410 than in OE33 and OE19 cells. The mitotic index was highest in OE21, followed by OE33 > OE19 > Kyse-410 and EPC-hTERT cells. Multipolar mitoses occurred with high frequency in OE33 (13.8 ± 4.2%), followed by OE21 (7.7 ± 5.0%) and Kyse-410 (6.3 ± 2.0%) cells. Single multipolar mitoses occurred in OE19 (1.0 ± 1.0%) cells. Distinct p53 mutations and p53 protein expression patterns were found in all esophageal cancer cell lines, but complete functional p53 inactivation occurred in OE21 and OE33 only. CONCLUSIONS: High Aurora-A expression alone is not associated with overt multipolar mitoses in aneuploid ESCC and BAC cancer cells, as specifically shown here for OE21 and OE33 cells, respectively. Additional p53 loss of function mutations are necessary for this to occur, at least for invasive esophageal cancer cells. Further assessment of Aurora kinases and p53 interactions in cells or tissue specimens derived from non-invasive dysplasia (ESCC) or intestinal metaplasia (BAC) are necessary to disclose a potential causative role of Aurora kinases and p53 for development of aneuploid, invasive esophageal cancers.

Chemotherapy, liver injury, and postoperative complications in colorectal liver metastases.

BACKGROUND: Systemic chemotherapy (CTx) is increasingly used before surgery for colorectal liver metastases (CRC-LM). However, CTx may cause liver injury like steatosis, steatohepatitis, and sinusoidal injury which may be associated with postoperative morbidity. Some recent data have even shown an increased mortality in patients with CTx-associated steatohepatitis. We, therefore, analyzed our recent experience with potential hepatic injury and its association with CTx and morbidity in patients undergoing surgery for CRC-LM. METHODS: From 2001 to 2007, 179 patients underwent primary liver resection for CRC-LM. Sufficient non-tumorous liver parenchyma could be re-evaluated for this study in 102 patients. In these 102 patients (66% male, median age 62 years, median BMI 26, 8% diabetics (IDDM)), liver injury was classified using established criteria for steatosis and sinusoidal dilatation (SD) and then compared with preoperative CTx and postoperative outcome. Fifty-eight percent of the operations were (extended) hemihepatectomies (ExtRes), 42% segmental or wedge resections (LimRes). Before resection, 66% had received CTx (33% FU-based (FU), 19% oxaliplatin-based (Oxa), 12% irinotecan-based (Iri), and 3% Oxa+Iri). The interval between CTx and surgery was always ≥4 weeks. RESULTS: Mortality was 3/102 (2.9%). Any complication occurred in 48%, hepatic insufficiency in 5.9%, and liver-related complications in 24%. Hepatic steatosis >20% was found in 37% (half of them with steatosis >50%). BMI correlated with the frequency of steatosis. Steatosis >20% was more frequent in patients with preoperative chemotherapy but did not depend on the chemotherapy regimen. No relevant risk factor for grades 2 and 3 SD was found. The specific use of Oxa or Iri did not significantly correlate with hepatic injury. Neither a CTx per se nor the different CTx regimens nor the extent of hepatic injury showed any negative influence on mortality, complication rates, or hepatic insufficiency. Patients with IDDM had a higher mortality (25% vs 1% without IDDM; p<0.02), increased complication rate (75% vs 46%; p=0.11), a higher rate of hepatic insufficiency (25% vs 4%; p<0.02), and more liver related complications (50% vs 21%; p=0.06). Patients undergoing ExtRes had a higher overall (p<0.01) and liver-related (p=0.05) complication rate compared to LimRes. None of the 34 patients with preoperative Oxa or Iri died or developed hepatic insufficiency. CONCLUSIONS: In our experience, hepatic injury (steatosis) was influenced by BMI and by preoperative CTx. Neither preoperative CTx nor liver injury increased perioperative morbidity. Patients with IDDM were at a rather high perioperative risk.

EGFR overexpression induces activation of telomerase via PI3K/AKT-mediated phosphorylation and transcriptional regulation through Hif1-alpha in a cellular model of oral-esophageal carcinogenesis.

Telomerase plays an important role during immortalization and malignant transformation as crucial steps in the development of human cancer. In a cellular model of oral-esophageal carcinogenesis, recapitulating the human disease, immortalization occurred independent of the activation of telomerase but through the recombination-based alternative lengthening of telomeres (ALT). In this stepwise model, additional overexpression of EGFR led to in vitro transformation and activation of telomerase with homogeneous telomere elongation in already immortalized oral squamous epithelial cells (OKF6-D1_dnp53). More interestingly, EGFR overexpression activated the PI3K/AKT pathway. This strongly suggested a role for telomerase in tumor progression in addition to just elongating telomeres and inferring an immortalized state. Therefore, we sought to identify the regulatory mechanisms involved in this activation of telomerase and in vitro transformation induced by EGFR. In the present study we demonstrate that telomerase expression and activity are induced through both direct phosphorylation of hTERT by phospho-AKT as well as PI3K-dependent transcriptional regulation involving Hif1-alpha as a key transcription factor. Furthermore, EGFR overexpression enhanced cell cycle progression and proliferation via phosphorylation and translocation of p21. Whereas immortalization was induced by ALT, in vitro transformation was associated with telomerase activation, supporting an additional role for telomerase in tumor progression besides elongating telomeres.

EGFR and HER2 expression in advanced biliary tract cancer.

AIM: To analyze the pathogenetic role and potential clinical usefulness of the epidermal growth factor receptor (EGFR) and the human epidermal growth factor receptor 2 (HER2) in patients with advanced biliary tract cancer (BTC). METHODS: EGFR and HER2 expression was studied in biopsy samples from 124 patients (51% women; median age 64.8 years), with advanced BTC diagnosed between 1997 and 2004. Five micrometers sections of paraffin embedded tissue were examined by standard, FDA approved immunohistochemistry. Tumors with scores of 2+ or 3+ for HER2 expression on immunochemistry were additionally tested for HER2 gene amplification by fluorescence in situ hybridisation (FISH). RESULTS: 34/124 patients (27.4%) had gallbladder cancer, 47 (37.9%) had intrahepatic BTC and 43 (34.7%) had extrahepatic or perihilar BTC. EGFR expression was examined in a subset of 56 samples. EGFR expression was absent in 22/56 tumors (39.3%). Of the remaining samples expression was scored as 1+ in 12 (21.5%), 2+ in 13 (23.2%) and 3+ in 9 (16%), respectively. HER2 expression was as follows: score 0 73/124 (58.8%), score 1+ 27/124 (21.8%), score 2+ 21/124 (17%) and score 3+ 4/124 (3.2%). HER2 gene amplification was present in 6/124, resulting in an overall amplification rate of 5%. CONCLUSION: Our data suggest that routine testing and therapeutic targeting of HER2 does not seem to be useful in patients with BTC, while targeting EGFR may be promising.

Quantitative promoter methylation analysis of hepatocellular carcinoma, cirrhotic and normal liver.

Hepatocellular carcinoma (HCC) is one of the most common cancers worldwide. Little is known about its molecular pathogenesis and the relevance of DNA methylation for disease initiation and progression. Nevertheless, promoter methylation of some genes has been implicated as potential marker for HCC. Thirty-four HCC, 34 matching non-malignant, cirrhotic livers and 16 normal livers were analyzed for the methylation status of the genes p16(INK4a), GSTP1, MGMT, DAP-K and APC by quantitative methylation-specific PCR. DNA promoter methylation frequencies in HCC and matching non-malignant cirrhotic liver, respectively, were as follows: p16(INK4a) (76% vs. 24%), GSTP1 (53% vs. 32%), MGMT (6 vs. 12%), DAP-K (68 vs. 100%) and APC (100 vs. 100%). GSTP1 and/or p16(INK4a) promoter methylation was observed in 88% of the HCC samples. In normal liver tissue, the p16(INK4a), GSTP1 and MGMT promoter were not methylated. DAP-K was methylated in 31% and APC even in 100% of normal liver samples. Quantitative levels of methylated promoter DNA of all genes were significantly different in the various tissue types except for MGMT. Our results suggest that promoter methylation of tumor-associated genes is a common event in hepatocarcinogenesis. Significantly, higher levels and frequencies of promoter methylation in HCC were found for p16(INK4a) and GSTP1 compared to non-malignant cirrhotic liver. This indicates that these epigenetic events may serve as a good marker for HCC. These data also demonstrate the importance of the quantification of methylated promoter DNA within a given sample and the use of normal tissue as controls. Quantitative analyses of methylated GSTP1 and p16(INK4a) promoter may serve as a powerful molecular marker in detecting HCC in biopsies.