RESUMO
BACKGROUND: Statins have recently been studied for their proapoptotic and antimetastatic effects. However, the exact mechanisms of their anticancer actions remain unclear. Using microarrays, we discovered up-regulation of annexin A10 (ANXA10) in PC-3 cells after simvastatin treatment. ANXA10 reportedly has antitumor effects. In this study, we evaluated the effects of simvastatin on ANXA10 signaling in androgen-independent prostate cancer cells. METHODS: PC-3, LNCaP-LA (which were derived from LNCaP cells and cultured in 10% charcoal-stripped fetal bovine serum for 3 months), and DU145 human prostate cancer cell lines were used. Prostate tissues were collected from 60 patients (benign prostatic hyperplasia [BPH], n = 20; prostate cancer with a Gleason score of 7, n = 20; prostate cancer with a Gleason score of 8-10, n = 20) at the time of prostate biopsies performed. We used a nude mouse tumor xenograft model with administration of simvastatin or phosphate-buffered saline via intraperitoneal injection. RESULTS: Simvastatin inhibited the proliferation, migration, and invasion of PC-3, LNCaP-LA, and DU145 cells. The expression level of ANXA10 was up-regulated by simvastatin in PC-3, LNCaP-LA, and DU145 cells. Transfection with ANXA10 inhibited PC-3 and LNCaP-LA cells proliferation, migration, and invasion. Knockdown of ANXA10 by siRNA increased the proliferation of PC-3 and LNCaP-LA cells. In a nude mouse xenograft model of PC-3 cells, simvastatin induced both reduction in the tumor size and up-regulation of ANXA10 expression. In human prostate biopsy samples, ANXA10 mRNA expression was significantly lower in the prostate cancer group than in the BPH group. Next, we found that up-regulation of ANXA10 in PC-3 resulted in down-regulation of S100 calcium binding protein A4 (S100A4), which is reportedly correlated with aggressiveness and a worse prognosis for patients with different types of carcinomas. Expression of S100A4 was down-regulated by simvastatin. In PC-3 cells, knockdown of S100A4 by siRNA inhibited the proliferation, migration, and invasion of PC-3 cells. CONCLUSION: Our results suggest that statins inhibit the proliferation, migration, and invasion of androgen-independent prostate cancer cells by up-regulation of ANXA10. Additionally, it is possible that S100A4 plays a role in these effects. Statins may be beneficial in the prevention and/or treatment of prostate cancer. Prostate 77: 337-349, 2017. © 2016 Wiley Periodicals, Inc.
Assuntos
Anexinas/biossíntese , Movimento Celular/fisiologia , Proliferação de Células/fisiologia , Neoplasias de Próstata Resistentes à Castração/metabolismo , Sinvastatina/farmacologia , Regulação para Cima/fisiologia , Animais , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Humanos , Inibidores de Hidroximetilglutaril-CoA Redutases/farmacologia , Inibidores de Hidroximetilglutaril-CoA Redutases/uso terapêutico , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Invasividade Neoplásica/patologia , Neoplasias de Próstata Resistentes à Castração/tratamento farmacológico , Neoplasias de Próstata Resistentes à Castração/patologia , Sinvastatina/uso terapêutico , Regulação para Cima/efeitos dos fármacosRESUMO
Metformin is a biguanide drug that is widely used for the treatment of type 2 diabetes. Recent studies have shown that metformin inhibits cancer cell proliferation and tumor growth both in vitro and in vivo. The anti-tumor mechanisms of metformin include activation of the AMP-activated protein kinase/mTOR pathway and direct inhibition of insulin/insulin-like growth factor (IGF)-mediated cellular proliferation. However, the anti-tumor mechanism in prostate cancer remains unclear. Because activation of the IGF-1 receptor (IGF-1R) is required for prostate cell proliferation, IGF-1R inhibitors may be of therapeutic value. Accordingly, we examined the effects of metformin on IGF-1R signaling in prostate cancer cells. Metformin significantly inhibited PC-3 cell proliferation, migration, and invasion. IGF-1R mRNA expression decreased significantly after 48 h of treatment, and IGF-1R protein expression decreased in a similar manner. IGF-1R knockdown by siRNA transfection led to inhibited proliferation, migration and invasion of PC-3 cells. IGF-1 activated both ERK1/2 and Akt, but these effects were attenuated by metformin treatment. In addition, intraperitoneal treatment with metformin significantly reduced tumor growth and IGF-1R mRNA expression in PC-3 xenografts. Our results suggest that metformin is a potent inhibitor of the IGF-1/IGF-1R system and may be beneficial in prostate cancer treatment.
Assuntos
Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Fator de Crescimento Insulin-Like I/metabolismo , Metformina/administração & dosagem , Neoplasias da Próstata/patologia , Neoplasias da Próstata/fisiopatologia , Receptor IGF Tipo 1/metabolismo , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Relação Dose-Resposta a Droga , Regulação para Baixo/efeitos dos fármacos , Humanos , Masculino , Invasividade Neoplásica , Neoplasias da Próstata/tratamento farmacológicoRESUMO
Microsurgical subinguinal varicocelectomy is one of the best treatment modalities for varicoceles. However, the difficulty in identifying testicular arteries that should be spared is a limitation of this technique. We assessed the efficacy of intraoperative indocyanine green angiography (ICGA) during microsurgical subinguinal varicocelectomy in three pilot cases. We performed microsurgical subinguinal varicocelectomy using a surgical microscope for observing infrared fluorescence in patients with infertility or chronic pain associated with varicoceles. After the exposure of the spermatic cord blood vessels, ICG was injected intravenously to identify and isolate the testicular artery. Thereafter, the varicose veins were repeatedly ligated, while preserving a few lymphatic vessels and the spermatic duct. The testicular artery could be clearly identified by ICGA and were able to separate under ICGA. The preserved arteries were confirmed by ICGA at the end of microsurgical operation. Though, all the internal spermatic veins could be safely ligated, while sparing the testicular arteries and lymphatic vessels. Microsurgical subinguinal varicocelectomy using intraoperative ICGA facilitated safe and quick surgery by enabling the visualization of the spermatic cord blood vessels. This is the first report to indicate the usefulness of vessel visualization by ICGA during microsurgical subinguinal varicocelectomy.
Assuntos
Angiofluoresceinografia , Procedimentos Cirúrgicos Urogenitais/métodos , Varicocele/cirurgia , Adulto , Humanos , Verde de Indocianina , Masculino , Microcirurgia/métodos , Pessoa de Meia-Idade , Projetos PilotoRESUMO
A 41-year-old man with a history of cloacal exstrophy presented to a local clinic with abdominal pain and bowel sounds. He was noted to have pain at the site of scarring due to cloacal exstrophy and a laceration at its center, which was stained with feces. He was referred to our department because of an enterocutaneous fistula. Skin biopsy of the neoplastic lesion at this site led to a diagnosis of squamous cell carcinoma. Computed tomography showed tumor invasion of the ileum and right inguinal lymph node enlargement. We performed tumor resection, partial enterectomy, intestinal anastomosis, abdominal wall reconstruction with a left pedicled anterolateral thigh flap, split-thickness skin grafting, and right inguinal lymph node biopsy. Histopathological examination revealed cancer growth, invasion, and pearl formation in the lymph nodes, leading to a diagnosis of abdominal squamous cell carcinoma with metastasis to the inguinal lymph nodes. The skin graft took well, and the patient was discharged. He is scheduled for right inguinal lymph node dissection at a later date.
Assuntos
Anus Imperfurado/complicações , Carcinoma de Células Escamosas/complicações , Neoplasias do Colo/complicações , Adulto , Malformações Anorretais , Carcinoma de Células Escamosas/patologia , Neoplasias do Colo/patologia , Neoplasias do Colo/cirurgia , Humanos , Excisão de Linfonodo , Linfonodos/patologia , Metástase Linfática , Masculino , Invasividade Neoplásica , Tomografia Computadorizada por Raios XRESUMO
We herein present a case of a 65-year-old woman who developed severe septic shock following flexible transurethral lithotripsy (f-TUL) showing favourable response after treatment with doripenem and recombinant thrombomodulin (rTM). The patient underwent f-TUL for nephrolithiasis of the left kidney. Preoperative urine culture indicated the presence of a mucoid strain of E. coli that was susceptible to cefazolin ; therefore, the antibiotic cefazolin was administered as a preventive measure. The operation was completed without any specific intraoperative complications. On the day following the operation, blood pressure decreased and clouding of consciousness was observed. Hematological examination showed high levels of procalcitonin, a decrease in platelet count, and high levels of fibrin degradation products (FDP), indicative of severe septic shock and disseminated intravascular coagulation (DIC). The patient was immediately shifted to the intensive care unit (ICU), and multidisciplinary treatment consisting of doripenem (3 g/day) and rTM (380 U/kg) was administered. The medical treatment was successful ; the patient recovered from DIC at an early stage and was able to leave the hospital within 10 days after the operation. The risk of complications is expected to increase with the spread of f-TUL, and prompt action must be taken.
Assuntos
Litotripsia/efeitos adversos , Choque Séptico/terapia , Trombomodulina/uso terapêutico , Idoso , Carbapenêmicos/uso terapêutico , Terapia Combinada , Doripenem , Feminino , Humanos , Litotripsia/métodos , Proteínas Recombinantes/uso terapêutico , Choque Séptico/etiologia , Resultado do TratamentoRESUMO
OBJECTIVE: Transurethral enucleation with bipolar (TUEB) is an established procedure for treating patients with benign prostatic hyperplasia (BPH). In this study, the usefulness of TUEB was evaluated by comparing the preoperative and postoperative results. MATERIALS AND METHODS: A total of 45 patients with symptomatic BPH underwent TUEB at our hospital between February 2008 and August 2009. All the patients were assessed using the International prostate symptom score (IPSS), quality of life (QOL) index, overactive bladder symptom score (OABSS), maximum urinary flow rate (Qmax), post void urine residue (PVR), serum prostate specific antigen (PSA) measurement, and estimated prostate weight. Total operative time, enucleation time, enucleated tissue weight, changes in levels of hemoglobin, hematocrit and serum sodium, duration of urethral catheterization, and complications were also investigated. IPSS, QOL index, Qmax, and PVR were reassessed 1, 3, 6 and 12 months after surgery. PSA reduction rate was also assessed 3 months after surgery. RESULTS: The average age was 71.6 years (60-84 years), estimated prostate weight 53.2 g (11.8-105.6 g), total operative time 125.5 minutes (76-212 min.), enucleation time 96.1 min (56-169 min), enucleated tissue weight 32.3 g (6-82 g), and duration of urethral catheterization 2.5 days (2-7 days). Blood transfusion was not required and hyponatremia was not observed in any patients. IPSS, QOL index, OABSS, PVR, and Qmax were significantly improved 1 month after surgery. As complications, re-catheterisation was reported in 2 patients (4.4%), bladder tanponade in 1 (2.2%), and urinary incontinence requiring at least 1 pad 6 months after surgery in 1 (5.9%). Postoperative PSA declined by 89.8% 3 months after surgery. CONCLUSIONS: TUEB was a safe and effective treatment procedure for patients with BPH.
Assuntos
Hiperplasia Prostática/cirurgia , Ressecção Transuretral da Próstata/métodos , Idoso , Idoso de 80 Anos ou mais , Biomarcadores/sangue , Humanos , Masculino , Pessoa de Meia-Idade , Antígeno Prostático Específico/sangue , Hiperplasia Prostática/diagnóstico , Hiperplasia Prostática/fisiopatologia , Qualidade de Vida , UrodinâmicaRESUMO
Statins have become of interest in research due to their anticancer effects. However, the exact mechanism of their anticancer properties remains unclear. The authors previously reported that statins decrease intracellular cholesterol levels in androgen-independent prostate cancer cells. In de novo androgen synthesis, cholesterol is the primary material and certain enzymes have important roles. The present study aimed to determine whether simvastatin alters the expression of androgen synthesis-associated enzymes in androgen-independent prostate cancer cells. A novel combination therapy of statins and other drugs that inhibit the overexpression of enzymes involved in androgen synthesis was explored. The cytotoxicity of simvastatin and meclofenamic acid was assessed in prostate cancer cells using MTS and migration assays. Testosterone and dihydrotestosterone concentrations in the culture medium were measured using liquid chromatography-tandem mass spectrometry. RAC-α-serine/threonine-protein kinase (Akt) phosphorylation was detected by western blot analysis. Following treatment with simvastatin, aldo-keto reductase family 1 member C3 (AKR1C3) expression increased in PC-3 (>60-fold) and LNCaP-LA cells, however not in 22Rv1 cells. Small interfering (si)RNA was used to clarify the effects of AKR1C3 expression. The reduction in AKR1C3 expression in PC-3 cells following siRNA transfection was not associated with basal cell proliferation and migration; however, treatment with simvastatin decreased cell proliferation and migration. The combination of simvastatin and meclofenamic acid, an AKR1C3 inhibitor, further enhanced the inhibition of cell proliferation and migration compared with treatment with either drug alone. Furthermore, treatment with simvastatin attenuated insulin-like growth factor 1-induced Akt activation; however, the combination of simvastatin and meclofenamic acid further inhibited Akt activation. These results suggest that the combination of simvastatin and meclofenamic acid may be an effective strategy for the treatment of castration-resistant prostate cancer.
RESUMO
AIM: The purpose of the present study was to clarify whether treatment with YM155, a novel small-molecule inhibitor of survivin, reverses statin resistance in statin-resistant renal cell cancer (RCC). MATERIALS AND METHODS: We induced simvastatin resistance in a renal clear cell carcinoma cell line (Caki-1-staR). In vitro and in vivo models were used to test the efficacy of YM155 and simvastatin. RESULTS: Survivin gene expression was significantly stronger in Caki-1-staR cells than in its parent cells (Caki-1). In Caki-1-staR cells, YM155 significantly reduced expression of survivin gene and cell proliferation in a dose-dependent manner. Treatment with YM155 significantly reversed simvastatin resistance in Caki-1-staR cells. YM155 significantly inhibited the growth of Caki-1-staR tumors in a nude mouse tumor xenograft model. Furthermore, YM155 significantly enhanced the antitumor effects of simvastatin on Caki-1-staR tumors. CONCLUSION: Our results indicate that inhibition of survivin by YM155 overcomes statin resistance in RCC cells.
Assuntos
Antineoplásicos/farmacologia , Carcinoma de Células Renais/tratamento farmacológico , Resistencia a Medicamentos Antineoplásicos/efeitos dos fármacos , Inibidores de Hidroximetilglutaril-CoA Redutases/farmacologia , Imidazóis/farmacologia , Proteínas Inibidoras de Apoptose/antagonistas & inibidores , Neoplasias Renais/tratamento farmacológico , Naftoquinonas/farmacologia , Sinvastatina/farmacologia , Animais , Carcinoma de Células Renais/genética , Carcinoma de Células Renais/metabolismo , Carcinoma de Células Renais/patologia , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Relação Dose-Resposta a Droga , Regulação para Baixo , Resistencia a Medicamentos Antineoplásicos/genética , Regulação Neoplásica da Expressão Gênica , Humanos , Proteínas Inibidoras de Apoptose/genética , Proteínas Inibidoras de Apoptose/metabolismo , Neoplasias Renais/genética , Neoplasias Renais/metabolismo , Neoplasias Renais/patologia , Masculino , Camundongos Endogâmicos BALB C , Camundongos Nus , Interferência de RNA , Survivina , Fatores de Tempo , Transfecção , Carga Tumoral/efeitos dos fármacos , Ensaios Antitumorais Modelo de XenoenxertoRESUMO
OBJECTIVES: Microsurgical subinguinal varicocelectomy is one of the best treatment modalities for varicoceles related to male infertility and scrotal pain. However, the difficulty in identifying testicular arteries, which should be spared, is a limitation of this technique. To visualize and identify the testicular arteries in spermatic cord during the operation, we examined the efficacy of intraoperative indocyanine green angiography (ICGA), which is regularly used in microsurgical neurosurgery. METHODS: After the exposure of the spermatic cord blood vessels, ICG was injected intravenously under a surgical microscope for observing infrared fluorescence in patients to identify and isolate the testicular artery. RESULTS: The testicular artery was clearly identified by ICGA and was able to separate under ICGA view. Thereafter, the varicose veins were repeatedly ligated, while preserving a few lymphatic vessels and the spermatic duct. The preserved arteries were confirmed by repeated ICGA at the end of microsurgical operation. The number of arteries identified by ICGA was greater than the number detected by preoperative computed tomography angiogram. CONCLUSIONS: Microsurgical subinguinal varicocelectomy using intraoperative ICGA facilitated safe and quick surgery by enabling the visualization of the spermatic cord blood vessels. This is the first report to indicate the usefulness of vessel visualization by ICGA during microsurgical subinguinal varicocelectomy.
Assuntos
Angiografia , Verde de Indocianina , Infertilidade Masculina/cirurgia , Procedimentos Cirúrgicos Urológicos Masculinos , Varicocele/cirurgia , Adulto , Humanos , Infertilidade Masculina/etiologia , Masculino , Microcirurgia , Varicocele/complicaçõesRESUMO
BACKGROUND: There are some reports about the antitumor effects of statins in these days. Statins decrease the level of cholesterol in the blood by inhibiting 3-hydroxy-3-methylglutaryl-coenzyme A reductase. Inhibition of this enzyme decreases intracellular cholesterol synthesis. Thus, the expression of low-density lipoprotein receptor (LDLr) is increased to import more cholesterol from the bloodstream. In this study, we assessed the effects of statins on the proliferation of prostate cancer cells, and studied the relationship between the expression of LDLr and the effects of statins. METHODS: Simvastatin was used in the experiments. We studied the effect of simvastatin on PC-3 and LNCaP cell proliferation using the MTS assay, and evaluated the expression of LDLr after administration of simvastatin by quantitative polymerase chain reaction and Western blotting. Intracellular cholesterol levels in the prostate cancer cells were measured after administration of simvastatin. Furthermore, small interfering RNA (siRNA) was used to knockdown the gene expression of LDLr. RESULTS: In PC-3 cells, simvastatin inhibited cell proliferation. In LNCaP cells, only a high concentration of simvastatin (100µM) inhibited cell proliferation. In LNCaP cells, the protein level of LDLr was increased by simvastatin. In PC-3 cells, the protein levels of LDLr were unregulated. In PC-3 cells, but not in LNCaP cells, intracellular cholesterol levels were significantly decreased by simvastatin. After knocking down LDLr expression by siRNA, intracellular cholesterol levels were decreased, and cell proliferation was inhibited by simvastatin in LNCaP cells. CONCLUSION: Simvastatin inhibited prostate cancer cell growth by decreasing cellular cholesterol and could be more effective in androgen-independent prostate cancer, where there is loss of regulation of LDLr expression. LDLr was shown to play an important role in the statin-induced inhibition of prostate cancer cell proliferation. These results suggest that future studies evaluating the cholesterol-lowering effects of statin may lead to new approaches to the prevention and treatment of prostate cancer.
RESUMO
BACKGROUND/AIM: Recent studies have shown that an early prostate-specific antigen (PSA) response to androgen receptor (AR)-targeting agents in metastatic castration-resistant prostate cancer (mCRPC) is associated with a better prognosis. We analyzed early PSA response to enzalutamide and oncological outcomes to study their prognostic significance in the Japanese population. PATIENTS AND METHODS: Fifty-one patients with mCRPC (26 of pre-docetaxel and 25 of post-docetaxel status) were treated with enzalutamide. The PSA progression-free survival (PFS), radiographic PFS (rPFS) and overall survival (OS) were assessed. The association of rPFS and OS in patients with an early PSA response at 4 weeks after commencement of enzalutamide was studied. RESULTS: Early PSA responses were significantly associated with a longer rPFS (median of 47.9 vs. 20.1 weeks, p<0.001, in patients exhibiting a 50% PSA response; median of 40.9 vs. 20.1 weeks, p=0.016, in patients exhibiting a 30% PSA response). OS was also significantly associated with an early PSA response (p=0.002 for patients exhibiting a 50% PSA response, p=0.003 for patients exhibiting a 30% PSA response). Multivariate analysis showed that the predictors of a 50% PSA response were an interval to mCRPC and a docetaxel treatment history, while the predictor of a 30% PSA response was a docetaxel treatment history. Furthermore, a 50% PSA response was independently prognostic of rPFS. CONCLUSION: An early PSA response to enzalutamide was significantly associated with a longer rPFS and OS. This information will aid in the management of patients treated with enzalutamide.
Assuntos
Antineoplásicos/uso terapêutico , Feniltioidantoína/análogos & derivados , Antígeno Prostático Específico/sangue , Neoplasias de Próstata Resistentes à Castração/tratamento farmacológico , Idoso , Idoso de 80 Anos ou mais , Benzamidas , Intervalo Livre de Doença , Humanos , Japão , Masculino , Pessoa de Meia-Idade , Metástase Neoplásica , Nitrilas , Feniltioidantoína/uso terapêutico , Neoplasias de Próstata Resistentes à Castração/patologiaRESUMO
OBJECTIVES: To investigate the levels of testosterone, luteinizing hormone (LH), follicle-stimulating hormone (FSH), and prostate-specific antigen (PSA) in prostate cancer patients before and after the switch from degarelix to leuprolide treatments. METHODS: We enrolled 40 treatment-naïve prostate cancer patients who were treated initially with degarelix and were later switched to leuprolide. The subjects were divided into three groups depending on when they were switched to leuprolide: the 3-month group (3m; switched after 84 days, n=10), the 2-month group (2m; 56 days, n=10), and the 1-month group (1m; 28 days, n=20). Patient symptoms and hormone levels were measured after switching therapy. The castration level was defined as a serum testosterone level ≤50 ng/dl. RESULTS: Thirty-nine subjects (97.5%) achieved castration levels of testosterone (11±5.8 ng/dl) 2 weeks after degarelix was first administered, and the characteristics of these patients were investigated. Testosterone levels increased and exceeded the castration level in one subject each of the 3m (142 ng/dl), 2m (72 ng/dl), and 1m groups (63 ng/dl). All subjects achieved the castration level by day 5. In contrast to testosterone levels, the LH and FSH surge on day 2 was significantly higher in the 1m group than in the other groups. The clinical symptoms were not exacerbated before or after switching in any patients. CONCLUSIONS: A testosterone surge was observed in 8.3 % of the study patients; however, it was very short-lived and mild. LH and FSH levels were significantly higher 1 month after administration compared with 2 or 3 months after degarelix administration.