Long-term sexual functioning in germ-cell tumor survivors

Long-term quality of life of testicular cancer survivors differs according to applied adjuvant treatment and tumour type

PURPOSE

To evaluate the quality of life (QoL) in long-term testicular cancer (TC) survivors.

METHODS

QoL was assessed in TC survivors treated between March 1976 and December 2004 (n = 625) using the EORTC-QLQ-C30 questionnaire, including a TC module. The assessment was performed at two time points (2006: response rate: n = 201/625 (32.2%), median follow-up (FU): 12.9 years (range 1.1-30.9); 2017: response rate: n = 95/201 (47.3%), median FU: 26.2 years (range: 13.0-41.2)). TC survivors were grouped according to treatment strategy, tumour entity, clinical stage and prognosis group. Linear and multiple linear regression analyses were performed, with age and time of follow-up as possible confounders.

RESULTS

Radiation therapy (RT) compared to retroperitoneal lymph node dissection (RPLND) was associated with a higher impairment of physical function (2017: β =  - 9.038; t(84) =  - 2.03; p = 0.045), role function (2017: β =  - 12.764; t(84) =  - 2.00; p = 0.048), emotional function (2006: β =  - 9.501; t(183) =  - 2.09; p = 0.038) and nausea (2006: β = 6.679; t(185) = 2.70; p = 0.008). However, RT was associated with a lower impairment of sexual enjoyment (2017: symptoms: β = 26.831; t(64) = 2.66; p = 0.010; functional: β = 22.983; t(65) = 2.36; p = 0.021). Chemotherapy (CT), compared to RPLND was associated with a higher impairment of role (2017: β =  - 16.944; t(84) =  - 2.62; p = 0.011) and social function (2017: β =  - 19.160; t(79) =  - 2.56; p = 0.012), more insomnia (2017: β = 19.595; t(84) = 2.25; p = 0.027) and greater concerns about infertility (2017: β = 19.830; t(80) = 2.30; p = 0.024). In terms of tumour type, nonseminomatous germ cell tumour (NSGCT) compared to seminoma survivors had significantly lower impairment of nausea (2006: β =  - 4.659; t(187) =  - 2.17; p = 0.031), appetite loss (2006: β =  - 7.554; t(188) =  - 2.77; p = 0.006) and future perspective (2006: β =  - 12.146; t(175) =  - 2.08; p = 0.039). On the other hand, surviving NSGCT was associated with higher impairment in terms of sexual problems (2006: β = 16.759; t(145) = 3.51; p < 0.001; 2017: β = 21.207; t(63) = 2.73; p = 0.008) and sexual enjoyment (2017: β =  - 24.224; t(66) =  - 2.76; p = 0.008).

CONCLUSIONS

The applied adjuvant treatment and the tumour entity had a significant impact on the long-term QoL of TC survivors, even more than 25 years after the completion of therapy. Both RT and CT had a negative impact compared to survivors treated with RPLND, except for sexual concerns. NSGCT survivors had a lower impairment of QoL compared to seminoma survivors, except in terms of sexual concerns.

IMPLICATIONS FOR CANCER SURVIVORS

Implications for cancer survivors are to raise awareness of aspects of long-term and late effects on QoL in TC survivors; offer supportive care, such as psycho-oncological support or lifestyle modification, if a deterioration in QoL is noticed; and avoid toxic treatment without compromising a cure whenever possible.

Comparison of laparoscopic, robotic, and open retroperitoneal lymph node dissection for non-seminomatous germ cell tumor: a single-center retrospective cohort study

PURPOSE

To compare the perioperative outcomes of L-RPLND, R-RPLND and O-RPLND, and determine which one can be the mainstream option.

METHODS

We retrospectively reviewed medical records of 47 patients undergoing primary RPLND by three different surgical techniques for stage I-II NSGCT between July 2011 and April 2022 at our center. Standard open and laparoscopic RPLND was performed with usual equipment, and robotic RPLND was operated with da Vinci Si system.

RESULTS

Forty-seven patients underwent RPLND during 2011-2022, and 26 (55.3%) of them received L-RPLND, 14 (29.8%) were operated with robot, while 7 (14.9%) were performed O-RPLND. The median follow-up was 48.0 months, 48.0 months, and 60.0 months, respectively. The oncological outcomes were comparable among all groups. In L-RPLND group, there were 8 (30.8%) cases of low grade (Clavien I-II) complications, and 3 (11.5%) cases of high-grade (Clavien III-IV) complications. In R-RPLND group, one (7.1%) low-grade complication and four (28.6%) high-grade complications were observed. In O-RPLND group, there were 2 (28.5%) cases of low-grade complications and one case (14.2%) of high-grade one. The operation duration of L-RPLND was the shortest. In O-RPLND group, the number of positive lymph nodes were higher than other two groups. Patients undergoing open surgery had lower (p < 0.05) red blood cell count, hemoglobin level, and higher (p < 0.05) estimated blood loss, white blood cell count than those receiving either laparoscopic or robotic surgery.

CONCLUSION

All three surgical techniques are comparable in safety, oncological, andrological, and reproductive outcomes under the circumstance of not using primary chemotherapy. L-RPLND might be the most cost-effective option.

The prevalence and intensity of late effects in patients with testicular germ cell tumors: A first step of instrument development using a stepwise approach

PURPOSE

Patients with Testicular Germ Cell Tumors (TGCT) may suffer from several late effects due to their diagnosis or treatment. Follow-up care aims to identify the recurrence of cancer and support patients with TGCT in their experienced late effects. In the Netherlands, the validated Dutch version of the Edmonton Symptom Assessment System, Utrecht Symptom Diary (USD) is used to assess and monitor patient reported symptoms. As a first step to develop a specific USD module for TGCT-patients, it was necessary to identify the prevalence and intensity of late effects in patients with TGCT, covering the physical, social, psychical and existential domains of care.

METHODS

A cross-sectional study was conducted. First, literature was systematically assessed to create a comprehensive list of symptoms. This generated list was reviewed by expert healthcare professionals and the research group. Lastly, a survey was distributed amongst patients with TGCT in follow-up care in the University Medical Center Utrecht (UMCU) outpatient clinic.

RESULTS

In total, 65 TGCT-patients completed the survey. All described late effects were recognized by TGCT-patients, with 'fatigue', 'disturbed overall well-being', 'concentration problems' and 'neuropathy', indicated as most prevalent and scored with highest intensity. When prioritizing these late effects, patients assigned 'neuropathy' as most important.

CONCLUSIONS

This study provided insight into prevalence and intensity of late effects, as indicated by TGCT-patients. In clinical practice, follow-up care can improve by empowering patients to discuss important items in daily life with their health-care professionals.

Integrated Microarray-Based Data Analysis of miRNA Expression Profiles: Identification of Novel Biomarkers of Cisplatin-Resistance in Testicular Germ Cell Tumours

Testicular germ cell tumours (TGCTs) are the most common solid malignancy among young men, and their incidence is still increasing. Despite good curability with cisplatin (CDDP)-based chemotherapy, about 10% of TGCTs are non-responsive and show a chemoresistant phenotype. To further increase TGCT curability, better prediction of risk of relapse and early detection of refractory cases is needed. Therefore, to diagnose this malignancy more precisely, stratify patients more accurately and improve decision-making on treatment modality, new biomarkers are still required. Numerous studies showed association of differential expressions of microRNAs (miRNAs) with cancer. Using microarray analysis followed by RT-qPCR validation, we identified specific miRNA expression patterns that discriminate chemoresistant phenotypes in TGCTs. Comparing CDDP-resistant vs. -sensitive TGCT cell lines, we identified miR-218-5p, miR-31-5p, miR-125b-5p, miR-27b-3p, miR-199a-5p, miR-214-3p, let-7a and miR-517a-3p as significantly up-regulated and miR-374b-5p, miR-378a-3p, miR-20b-5p and miR-30e-3p as significantly down-regulated. In patient tumour samples, we observed the highest median values of relative expression of miR-218-5p, miR-31-5p, miR-375-5p and miR-517a-3p, but also miR-20b-5p and miR-378a-3p, in metastatic tumour samples when compared with primary tumour or control samples. In TGCT patient plasma samples, we detected increased expression of miR-218-5p, miR-31-5p, miR-517a-3p and miR-375-5p when compared to healthy individuals. We propose that miR-218-5p, miR-31-5p, miR-375-5p, miR-517-3p, miR-20b-5p and miR-378a-3p represent a new panel of biomarkers for better prediction of chemoresistance and more aggressive phenotypes potentially underlying metastatic spread in non-seminomatous TGCTs. In addition, we provide predictions of the targets and functional and regulatory networks of selected miRNAs.

Cognitive impairment and biomarkers of gut microbial translocation in testicular germ cell tumor survivors

Background

Survivors of testicular germ cell tumors (GCT) may suffer from late cognitive impairment. We hypothesized that disruption of intestinal barrier during chemotherapy and/or radiotherapy may be a contributing factor of cognitive dysfunction within the gut-blood-brain axis.

Methods

GCT survivors (N = 142) from National Cancer Institute of Slovakia completed the Functional Assessment of Cancer Therapy Cognitive Function questionnaires during their annual follow-up visit at 9-year median (range 4-32). Biomarkers of gut microbial translocation and dysbiosis high mobility group box-1 (HMGB-1), lipopolysaccharide, d-lactate and sCD14 were measured from peripheral blood obtained during the same visit. Each questionnaire score was correlated with biomarkers. Survivors were treated with orchiectomy only (N = 17), cisplatin-based chemotherapy (N = 108), radiotherapy to the retroperitoneum (N = 11) or both (N = 6).

Results

GCT survivors with higher sCD14 (above median) had worse cognitive function perceived by others (CogOth domain) (mean ± SEM; 14.6 ± 0.25 vs 15.4 ± 0.25, p = 0.019), lower perceived cognitive abilities (CogPCA domain) (20.0 ± 0.74 vs 23.4 ± 0.73, p = 0.025) and lower overall cognitive function score (109.2 ± 0.74 vs 116.7 ± 1.90, p = 0.021). There were no significant cognitive declines associated with HMGB-1, d-lactate and lipopolysaccharide. Survivors treated with ≥ 400mg/m2 vs < 400mg/m2 of cisplatin-based chemotherapy had a higher lipopolysaccharide (567.8 μg/L ± 42.7 vs 462.9 μg/L ± 51.9, (p = 0.03).

Conclusions

sCD14 is a marker of monocytic activation by lipopolysaccharide and may also serve as a promising biomarker of cognitive impairment in long-term cancer survivors. While chemotherapy and radiotherapy-induced intestinal injury may be the underlying mechanism, further research using animal models and larger patient cohorts are needed to explore the pathogenesis of cognitive impairment in GCT survivors within the gut-brain axis.

Biomarkers of disease recurrence in stage I testicular germ cell tumours

Stage I testicular cancer is a disease restricted to the testicle. After orchiectomy, patients are considered to be without disease; however, the tumour is prone to relapse in ~4-50% of patients. Current predictive markers of relapse, which are tumour size and invasion to rete testis (in seminoma) or lymphovascular invasion (in non-seminoma), have limited clinical utility and are unable to correctly predict relapse in a substantial proportion of patients. Adjuvant therapeutic strategies based on available biomarkers can lead to overtreatment of 50-85% of patients. Discovery and implementation of novel biomarkers into treatment decision making will help to reduce the burden of adjuvant treatments and improve patient selection for adjuvant therapy.

Novel sequential therapy with metformin enhances the effects of cisplatin in testicular germ cell tumours via YAP1 signalling

Background

Testicular germ cell tumours (TGCTs) are the most commonly diagnosed malignancy in young men. Although cisplatin has been shown to be effective to treat TGCT patients, long-term follow-up has shown that TGCT survivors who accepted cisplatin treatment suffered from a greater number of adverse reactions than patients who underwent orchiectomy alone. As metformin has shown an anticancer effect in various cancers, we investigated whether metformin could enhance the effects of cisplatin to treat TGCTs.

Methods

The anticancer effects of different treatment strategies consisting of metformin and cisplatin in TCam-2 and NTERA-2 cells were assessed in vitro and in vivo. First, we used a colony formation assay, CCK-8 and MTT assays to explore the viability of TGCT cells. Flow cytometry was used to assess the cell cycle and apoptosis of TGCTs. Then, Western blotting was used to detect the protein expression of TGCTs cells after different treatments. In addition, a xenograft model was used to investigate the effects of the different treatments on the proliferation of TGCT cells. Immunohistochemistry assays were performed to analyse the expression of related proteins in the tissues from the xenograft model.

Results

Metformin inhibited the proliferation of TCam-2 and NTERA-2 cells by arresting them in G1 phase, while metformin did not induce apoptosis in TGCT cells. Compared with cisplatin monotherapy, the CCK-8, MTT assay and colony formation assay showed that sequential treatment with metformin and cisplatin produced enhanced anticancer effects. Further study showed that metformin blocked the cells in G1 phase by inducing phosphorylated YAP1 and reducing the expression of cyclin D1, CDK6, CDK4 and RB, which enhanced the chemosensitivity of cisplatin and activated the expression of cleaved caspase 3 in TGCTs.

Conclusions

Our study discovers the important role of YAP1 in TGCTs and reports a new treatment strategy that employs the sequential administration of metformin and cisplatin, which can reduce the required cisplatin dose and enhance the sensitivity of TGCT cells to cisplatin. Therefore, this sequential treatment strategy may facilitate the development of basic and clinical research for anticancer therapies to treat TGCTs.

Patient Reported Outcomes, Paternity, Relationship, and Fertility in Testicular Cancer Survivors: Results from a Prospective Observational Single Institution Trial

PURPOSE

Testicular cancer (TC) is the most common solid tumor in young adults. 95% of patients are cured, but they may experience late adverse effects (anxiety, fear of recurrence, and sexual dysfunction) with an impact on daily life. We attempted to assess Patient Reported Outcomes (PROMs), long-term sexual disorders, and difficulties in achieving fatherhood in a cohort of TC survivors, as well as their possible correlation with previous cancer treatments.

METHODS

Different questionnaires, such as the Impact of Cancer (IOC) and the Body Image Scale (BIS), were used to investigate the distinct areas of the PROMs. International Index of Erectile Function (IIEF15) and the Premature Ejaculation Diagnostic Tool (PEDT) focused on sexuality and fertility. Patients were prospectively recruited between February 2020 and February 2022.

RESULTS

144 participants completed all the questionnaires. Results showed a good QoL, a moderate fear of TC recurrence, a good satisfaction with their personal body image, low incidence of premature ejaculation and erectile dysfunction. 19.5% of patients who had a testicular implant reported general dissatisfaction. Only 18% of patients had unsuccessfully attempted fatherhood, while the majority had not yet tried, and 23.4% succeeded. A low percentage of patients used procedures assisted reproduction and adoption.

CONCLUSION

This trial supports the use of various questionnaires as a multifactorial tool capable of investigating all the aspects of long-term cancer survivorship. The assessment of medical and psychosocial sequelae is an essential part of patient care and is important for the development of a comprehensive care plan for TC survivors.

Erectile dysfunction among testicular cancer survivors: A systematic review and meta-analysis

BACKGROUND

Erectile dysfunction is one of the common complications of testicular cancer with a prevalence of 11.3%-84%. It has devastating effects on men and their partner's quality of life, sexual satisfaction, and sexual experience. The findings of the previous studies on this matter were uneven and inconsistent. Therefore, this systematic review and meta-analysis is conducted to acquire a more recent and comprehensive result.

METHODS AND MATERIALS

PubMed, Scopus, Goggle scholar, Science Direct, African Index Medicus, African Journal online, EMBASE, and Cochrane Library databases were searched. All necessary data were extracted using a standardized data extraction format. Data were analyzed using STATA 14 statistical software. A heterogeneity of studies was assessed using the I2 statistics. Publication bias was checked by using a funnel plot and Egger's regression test. A random-effects model was computed to estimate the pooled prevalence of erectile dysfunction.

RESULT

Fourteen full-text studies were included in this systematic review and meta-analysis. The pooled prevalence of erectile dysfunction among testicular cancer survivors was found to be 34.60% (95% CI: 25.89, 43.30 [I2 = 95.9% p = 0.000]). Study design subgroup analysis indicated that the pooled prevalence of erectile dysfunction was 50.02% (95% CI: 22.78, 77.28% [I2 = 96.1 p = 0.000]), and 27.36% (95% CI: 19.23, 34.48% [I2 = 91.6, P = 0.000]) in the case-control and cohort studies, respectively. Likewise, the level of erectile dysfunction was varied based on ED erectile dysfunction measuring tools and testicular cancer treatment modalities.

CONCLUSION

In this study erectile dysfunction was found to be a highly prevalent complication in testicular cancer survivors. It had also causes of heterogeneity in terms of treatment modalities, study designs, and measuring tools. Therefore prevention of this complication should be the concern of the responsible bodies.

Late adverse effects and quality of life in survivors of testicular germ cell tumour

Currently, ~95% of patients with testicular germ cell tumour (TGCT) are cured, resulting in an increasing number of TGCT survivors. Although cured, these men face potential late adverse effects and reduced quality of life. Survivors face a twofold increased risk of second malignant neoplasms after chemotherapy and radiotherapy, with evidence of dose-dependent associations. For survivors managed with surveillance or treated with radiotherapy, the risk of cardiovascular disease (CVD) is comparable to the risk in the general population, whereas treatment with chemotherapy increases the risk of life-threatening CVD, especially during treatment and after 10 years of follow-up. Other adverse effects are organ-related toxicities such as neuropathy and ototoxicity. Pulmonary and renal impairment in patients with TGCT treated with chemotherapy is limited. Survivors of TGCT might experience psychosocial distress including anxiety disorders, fear of cancer recurrence and TGCT-specific issues, such as sexual dysfunction. Late adverse effects can be avoided in most patients with stage I disease if followed on a surveillance programme. However, patients with disseminated disease can experience toxicities associated with radiotherapy and chemotherapy, and/or adverse effects related to surgery for residual disease. The severity of adverse effects increases with dose of both chemotherapy and radiotherapy. This Review discusses the most recent data concerning the late adverse effects of today's standard treatments for TGCT.

Promising novel therapies for relapsed and refractory testicular germ cell tumors

INTRODUCTION

Germ cell tumors (GCTs) are the most common solid malignancies in young men. The overall cure rate of GCT patients in metastatic stage is excellent, however; patients with relapsed or refractory disease have poor prognosis. Attempts to treat refractory disease with novel effective treatment to improve prognosis have been historically dismal and the ability to predict prognosis and treatment response in GCTs did not sufficiently improve in the last three decades.

AREAS COVERED

We performed a comprehensive literature search of PubMed/MEDLINE to identify original and review articles (years 1964-2020) reporting on current improvement salvage treatment in GCTs and novel treatment options including molecularly targeted therapy and epigenetic approach. Review articles were further searched for additional original articles.

EXPERT OPINION

Despite multimodal treatment approaches the treatment of relapsed or platinum-refractory GCTs remains a challenge. High-dose chemotherapy (HDCT) regimens with autologous stem-cell transplant (ASCT) from peripheral blood showed promising results in larger retrospective studies. Promising results from in vitro studies raised high expectations in molecular targets. So far, the lacking efficacy in small and unselected trials do not shed a light on targeted therapy. Currently, wide inclusion of patients into clinical trials is highly advised.