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Kocbek V, Bersinger NA, Brglez V, Mueller MD, Petan T, Rižner TL. Phospholipase A2 group IIA is elevated in endometriomas but not in peritoneal fluid and serum of ovarian endometriosis patients. Gynecol Endocrinol 2015; 31:214-8. [PMID: 25366587 DOI: 10.3109/09513590.2014.975690] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Our previous gene expression analysis identified phospholipase A2 group IIA (PLA2G2A) as a potential biomarker of ovarian endometriosis. The aim of this study was to evaluate PLA2G2A mRNA and protein levels in tissue samples (endometriomas and normal endometrium) and in serum and peritoneal fluid of ovarian endometriosis patients and control women. One-hundred and sixteen women were included in this study: the case group included 70 ovarian endometriosis patients, and the control group included 38 healthy women and 8 patients with benign ovarian cysts. We observed 41.6-fold greater PLA2G2A mRNA levels in endometrioma tissue, compared to normal endometrium tissue. Using Western blotting, PLA2G2A was detected in all samples of endometriomas, but not in normal endometrium, and immunohistochemistry showed PLA2G2A-specific staining in epithelial cells of endometrioma paraffin sections. However, there were no significant differences in PLA2G2A levels between cases and controls according to ELISA of peritoneal fluid (6.0 ± 4.4 ng/ml, 6.6 ± 4.3 ng/ml; p = 0.5240) and serum (2.9 ± 2.1 ng/ml, 3.1 ± 2.2 ng/ml; p = 0.7989). Our data indicate that PLA2G2A is implicated in the pathophysiology of ovarian endometriosis, but that it cannot be used as a diagnostic biomarker.
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Senn B, Kobleder A, Raphaelis S, Mueller MD, Kammermann B, White K, Eicher M. Prevention and Reduction of Complications in Women with Vulvar Cancer: Development of an Algorithm for Safer Multidisciplinary Care. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/jct.2015.610090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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103
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McKinnon BD, Bertschi D, Bersinger NA, Mueller MD. Inflammation and nerve fiber interaction in endometriotic pain. Trends Endocrinol Metab 2015; 26:1-10. [PMID: 25465987 DOI: 10.1016/j.tem.2014.10.003] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 10/03/2014] [Accepted: 10/21/2014] [Indexed: 11/20/2022]
Abstract
Endometriosis is an extremely prevalent estrogen-dependent condition characterized by the growth of ectopic endometrial tissue outside the uterine cavity, and is often presented with severe pain. Although the relationship between lesion and pain remains unclear, nerve fibers found in close proximity to endometriotic lesions may be related to pain. Also, women with endometriosis pain develop central sensitization. Endometriosis creates an inflammatory environment and recent research is beginning to elucidate the role of inflammation in stimulating peripheral nerve sensitization. In this review, we discuss endometriosis-associated inflammation, peripheral nerve fibers, and assess their potential mechanism of interaction. We propose that an interaction between lesions and nerve fibers, mediated by inflammation, may be important in endometriosis-associated pain.
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Knabben L, Imboden S, Fellmann B, Nirgianakis K, Kuhn A, Mueller MD. Urinary tract endometriosis in patients with deep infiltrating endometriosis: prevalence, symptoms, management, and proposal for a new clinical classification. Fertil Steril 2015; 103:147-52. [DOI: 10.1016/j.fertnstert.2014.09.028] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 09/17/2014] [Accepted: 09/21/2014] [Indexed: 11/25/2022]
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Mueller MD. [Is hysterectomy nowadays an obsolete procedure?]. THERAPEUTISCHE UMSCHAU 2014; 71:723-6. [PMID: 25447087 DOI: 10.1024/0040-5930/a000618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
After the general morbidity reduction at the beginning of the century and the routine use of prophylactic antibiotics, a hysterectomy was generously, sometimes to generously indicated in the middle of the 20th century. This might be one of the major reasons why the procedure got a bad reputation. Furthermore, in the last decade, several new treatments for benign uterine pathologies have been developed which can be proposed to the patients instead of performing a hysterectomy. Therefore, the question might be asked, if nowadays there are still some indications for a hysterectomy or if the procedure is obsolete.
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Imboden S, Müller M, Raio L, Mueller MD, Tutschek B. Clinical significance of 3D ultrasound compared to MRI in uterine malformations. ULTRASCHALL IN DER MEDIZIN (STUTTGART, GERMANY : 1980) 2014; 35:440-444. [PMID: 24557634 DOI: 10.1055/s-0033-1335664] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
PURPOSE Congenital uterine anomalies often remain asymptomatic until they cause problems, for example during pregnancy. We studied the diagnostic aspects of two- and three-dimensional ultrasound and MRI. MATERIALS AND METHODS 63 women referred for suspected uterine anomalies were studied: In the first group (until July 2008) with 2 D-US and MRI, in the second group (from August 2008) additionally with 3 D-US; these women also had diagnostic or therapeutic operative confirmation. In the third group, only 3D-US was used. RESULTS In all women 3D-US was possible and successful. The most common anomaly was a subseptate uterus, while a septate uterus was less frequent, and uterus bicornis (unicollis) and uterus didelphys (bicornis bicollis) were rare. The women in the first two groups all underwent at least diagnostic hysteroscopy, and some (subseptate or septate uterus) underwent operative hysteroscopy. After preoperative volume imaging, laparoscopies were required less often. 3D-US diagnoses as judged by intraoperative findings were correct in 100 % of cases, while the MRI diagnoses in the same group were correct in only 7/13 cases. CONCLUSION Since the introduction of volume imaging (MRI, later 3 D-US), laparoscopy during hysteroscopic septum resection was not necessary in the majority of cases. 3D-US brings the diagnostics of uterine anomalies back into the hands of the gynecologist and can provide the gynecological surgeon with a higher subjective degree of certainty during operative hysteroscopy.
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Nirgianakis K, McKinnon B, Imboden S, Knabben L, Gloor B, Mueller MD. Laparoscopic management of bowel endometriosis: resection margins as a predictor of recurrence. Acta Obstet Gynecol Scand 2014; 93:1262-7. [DOI: 10.1111/aogs.12490] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Accepted: 08/26/2014] [Indexed: 11/27/2022]
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Imboden S, Al-Fana A, Kuhn A, Mueller MD. Pandora's box and retrorectal tumors in laparoscopy: A case report and review of the literature. Int J Surg Case Rep 2014; 5:706-9. [PMID: 25194610 PMCID: PMC4189049 DOI: 10.1016/j.ijscr.2014.08.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 08/11/2014] [Accepted: 08/11/2014] [Indexed: 12/26/2022] Open
Abstract
INTRODUCTION Retrorectal tumors are uncommon and the etiology diverse. Literature to define the preoperative diagnosis and plan the intraoperative management are uncommon. PRESENTATION OF CASE We describe a case of a 44 year old patient with a laparoscopic approach for the removal of a retrorectal tumor and emphasize on the preoperative diagnostics and the intraoperative, minimal invasive approach. DISCUSSION Especially because these tumors are rare and often an incidental finding in gynecologic surgery, it is important to know the various differential diagnoses and its consequences with the laparoscopic approach. CONCLUSION We suggest the laparoscopic approach in cases of retroperitoneal cysts of unknown origin is ideal also because anatomic structures, mostly nerves, can be easily spared.
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Kocbek V, Hevir-Kene N, Bersinger NA, Mueller MD, Rižner TL. Increased levels of biglycan in endometriomas and peritoneal fluid samples from ovarian endometriosis patients. Gynecol Endocrinol 2014; 30:520-4. [PMID: 24641675 DOI: 10.3109/09513590.2014.898055] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In our previous low-density-array gene-expression analysis we found an increased expression of biglycan gene in ovarian endometriosis patients. In the present study we evaluated biglycan expression at the protein level in tissue, serum and peritoneal fluid (PF) from ovarian endometriosis patients, patients with benign ovarian cysts and healthy women. Twenty samples of endometriomas and 27 of control tissues (benign ovarian cysts and eutopic endometrium of healthy women) were obtained laparoscopically or by curettage. Serum and PF samples were collected from 56 ovarian endometriosis patients and 40 controls (patients with benign cysts and healthy women). Tissue biglycan levels and serum and PF biglycan concentrations were determined by Western blotting and ELISA, respectively. Biglycan was detected in endometriomas and in benign cysts tissues but differed in glycosylation levels. The PF biglycan concentrations were significantly increased in ovarian endometriosis patients (mean ± SD=220.3 ± 190.5 pg/mg protein) compared to the whole control group (101.9 ± 94.7 pg/mg protein, p<0.001), while serum concentrations did not differ significantly. Biglycan appears to be involved in ovarian pathologies and probably has different roles in benign cysts as compared to ovarian endometriomas.
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McKinnon B, Bertschi D, Wotzkow C, Bersinger NA, Evers J, Mueller MD. Glucose transporter expression in eutopic endometrial tissue and ectopic endometriotic lesions. J Mol Endocrinol 2014; 52:169-79. [PMID: 24412827 DOI: 10.1530/jme-13-0194] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Endometriosis is an extremely prevalent disorder characterized by the growth of endometrial tissue at ectopic locations. Glycolysis is an energy-producing mechanism that occurs in almost all cells and requires an adequate uptake of glucose mediated by glucose transporter (GLUT) proteins. At present, however, very little is known about their expression in either the endometrium or the endometriotic lesions. The objective of this study was to examine the expression of SLC2A genes in the endometrium of women with and without endometriosis and in the matching ectopic tissue, and to confirm the presence of the GLUT proteins in ectopic lesions. There was a significantly higher expression of SLC2A3 and a significantly lower expression of SLC2A4 in women with endometriosis compared with those without. In women with endometriosis, the ectopic expression of SLC2A3, SLC2A4 and SLC2A5 was significantly higher than that observed in the matching eutopic tissue. GLUT1 protein expression was present in both epithelial and stromal cells and GLUT3 was confined to CD45-positive leukocytes. GLUT4 expression was strong in both ectopic epithelial and stromal cells and localized to the cellular membrane in epithelial cells. These results show that GLUT expression is altered between eutopic and ectopic tissue and between women with and without endometriosis, and that GLUT4 may represent a significant entry route for glucose into the endometriotic epithelial cells. The inducible nature of GLUT4 and its limited cellular expression may make GLUT4 an attractive target for non-hormone-based treatments of endometriosis.
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Yan BX, Ma JX, Zhang J, Guo Y, Mueller MD, Remick SC, Yu JJ. Prostasin may contribute to chemoresistance, repress cancer cells in ovarian cancer, and is involved in the signaling pathways of CASP/PAK2-p34/actin. Cell Death Dis 2014; 5:e995. [PMID: 24434518 PMCID: PMC4043260 DOI: 10.1038/cddis.2013.523] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 11/18/2013] [Accepted: 11/20/2013] [Indexed: 02/07/2023]
Abstract
Ovarian cancer is the deadliest of gynecologic cancers, largely due to the development of drug resistance in chemotherapy. Prostasin may have an essential role in the oncogenesis. In this study, we show that prostasin is decreased in an ovarian cancer drug-resistant cell line and in ovarian cancer patients with high levels of excision repair cross-complementing 1, a marker for chemoresistance. Our cell cultural model investigation demonstrates prostasin has important roles in the development of drug resistance and cancer cell survival. Forced overexpression of prostasin in ovarian cancer cells greatly induces cell death (resulting in 99% cell death in a drug-resistant cell line and 100% cell death in other tested cell lines). In addition, the surviving cells grow at a much lower rate compared with non-overexpressed cells. In vivo studies indicate that forced overexpression of prostasin in drug-resistant cells greatly inhibits the growth of tumors and may partially reverse drug resistance. Our investigation of the molecular mechanisms suggests that prostasin may repress cancer cells and/or contribute to chemoresistance by modulating the CASP/P21-activated protein kinase (PAK2)-p34 pathway, and thereafter PAK2-p34/JNK/c-jun and PAK2-p34/mlck/actin signaling pathways. Thus, we introduce prostain as a potential target for treating/repressing some ovarian tumors and have begun to identify their relevant molecular targets in specific signaling pathways.
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Yu JJ, Yang X, Song Q, Mueller MD, Remick SC. Dicycloplatin, a novel platinum analog in chemotherapy: synthesis of chinese pre-clinical and clinical profile and emerging mechanistic studies. Anticancer Res 2014; 34:455-463. [PMID: 24403501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Dicycloplatin (DCP) has better solubility and stability than both cisplatin and carboplatin. Pre-clinical and phase I studies demonstrated significant antitumor activity and fewer adverse events than carboplatin. Phase II clinical trials in advanced non-small cell lung cancer found efficacy and safety of DCP-plus-paclitaxel comparable to carboplatin-plus-paclitaxel but better tolerability. This article summarizes and reviews pre-clinical and clinical data for dicycloplatin from the Chinese medical literature. We also report on new mechanistic findings in our laboratory in West Virginia, USA. Patient blood samples were collected for DCP-prototype determination by liquid chromatography mass spectrometry (LC-MS/MS). Molecular studies of ovarian cancer cells treated with DCP or cisplatin were carried out for gene-signature profiling using immunoblotting. Pharmacokinetic mass-spectrometry showed different spectrum profiles of DCP and carboplatin in plasma. Plasma concentration of DCP prototype was 17.1 μg/ml 2h after administration, with a peak concentration of 26.9 μg/ml at 0.5 h. Immunoblotting showed DCP-induced activation of DNA damage pathways, including double-phosphorylated checkpoint kinase 2 (CHK2) and breast cancer 1 (BRCA1) and triple-phosphorylated p53, compared to controls. Cisplatin produced a similar profile, with increased p53 protein. DCP and cisplatin activate DNA-damage response through similar pathways. DCP may be more soluble and stable, and better-tolerated.
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Yan BX, Ma JX, Zhang J, Guo Y, Riedel H, Mueller MD, Remick SC, Yu JJ. PSP94 contributes to chemoresistance and its peptide derivative PCK3145 represses tumor growth in ovarian cancer. Oncogene 2013; 33:5288-94. [DOI: 10.1038/onc.2013.466] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 09/05/2013] [Accepted: 09/16/2013] [Indexed: 12/13/2022]
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Yu JJ, Yang X, Song Q, Mueller MD, Remick SC. Abstract B71: DNA damage responses to cisplatin and dicycloplatin, a new platinum analog. Mol Cancer Ther 2013. [DOI: 10.1158/1535-7163.targ-13-b71] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Dicycloplatin (DCP), a new platinum compound approved by the Chinese FDA in March of 2012, shows better water solubility, greater stability, and lower toxicity, compared to cisplatin and carboplatin. Preclinical in vitro and in vivo studies and a Phase I clinical trial demonstrated that DCP possesses strong antitumor activity and lower adverse events than carboplatin. Phase II clinical trials using dicycloplatin plus paclitaxel in chemotherapy-naïve patients with advanced NSCLC found that efficacy and safety of DCP plus paclitaxel regimen were comparable to those of carboplatin plus paclitaxel regimen, with slightly better tolerance. Materials and Methods: Pharmacokinetic study of DCP characteristics was conducted using AP-4000TM LC-MS/MS System in patient blood samples. Molecular mechanism studies of dicycloplatin-induced gene-signature profiling were determined by Immunoblotting and compared to cisplatin profiling in human ovarian cancer cells. Results: Pharmacokinetic mass spectrometry shows different spectrums of dicycloplatin and of carboplatin in plasma. Two hours after administration, plasma concentration of dicycloplatin prototype is still high (17.1 μg/ml), following a peak concentration of 26.9 µg/ml at 0.5-h. Molecular mechanism investigation showed DCP-induced activation of several kinases including phosphorylations of Chk2 at threonine 68, p53 at serine 15 and BRCA1 at serine 1497. The increases in p-Chk2 and p-BRCA1 showed that the amount of DCP-induced phosphorylation doubled at 48-h and tripled for p-p53 at 24-h, compared to controls. Conclusion: Dicycloplatin appears to activate DNA damage-repair pathways through mechanisms similar to cisplatin.
Citation Information: Mol Cancer Ther 2013;12(11 Suppl):B71.
Citation Format: Jing Jie Yu, Xuqing Yang, Qinhua Song, Michael D. Mueller, Scot C. Remick. DNA damage responses to cisplatin and dicycloplatin, a new platinum analog. [abstract]. In: Proceedings of the AACR-NCI-EORTC International Conference: Molecular Targets and Cancer Therapeutics; 2013 Oct 19-23; Boston, MA. Philadelphia (PA): AACR; Mol Cancer Ther 2013;12(11 Suppl):Abstract nr B71.
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McKinnon BD, Evers J, Bersinger NA, Mueller MD. Induction of the neurokinin 1 receptor by TNFα in endometriotic tissue provides the potential for neurogenic control over endometriotic lesion growth. J Clin Endocrinol Metab 2013; 98:2469-77. [PMID: 23553861 DOI: 10.1210/jc.2013-1019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
CONTEXT Endometriosis is characterized by the growth of ectopic endometrial tissue. Nerve fibers are frequently associated with ectopic lesions, and neurogenic inflammation may play a role in endometriosis. OBJECTIVE The purpose of this study was to determine the presence of tachykinin receptors in endometriotic lesions and the role of TNFα on their expression. DESIGN This study was an assessment of matching eutopic and ectopic endometrial tissue and peritoneal fluid from patients with endometriosis and an in vitro analysis of primary endometrial cells. SETTING The setting was a university hospital. PATIENTS Participants were premenopausal women undergoing laparoscopy. INTERVENTIONS Endometriotic lesions were removed surgically. MAIN OUTCOME MEASURES Tachykinin mRNA (TACR1/2) and protein (neurokinin 1 receptor [NK1R]) expression in both eutopic and ectopic endometrial tissue from patients with endometriosis and the correlation to peritoneal fluid TNFα were measured. Primary endometrial epithelial and stromal cells were assessed in vitro to determine the induction of TACR1/2 and NK1R expression after TNFα treatment. Cell viability of endometrial stromal cells after substance P exposure was also assessed. RESULTS Expression of both TACR1 and TACR2 mRNA was significantly higher in the ectopic than in the eutopic tissue. Both TACR1 mRNA and NK1R protein expression was significantly correlated with peritoneal fluid TNFα, and in vitro studies confirmed that TNFα treatment induced both TACR1 mRNA and NK1R protein expression in endometrial stromal cells. In endometrial stromal cells, substance P treatment enhanced cell viability, which was inhibited by a specific NK1R antagonist. CONCLUSIONS NK1R expression is induced in ectopic endometrial tissue by peritoneal TNFα. Induction of NK1R expression may permit endometriotic lesion maintenance via exposure to substance P.
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Kocbek V, Vouk K, Mueller MD, Rižner TL, Bersinger NA. Elevated glycodelin-A concentrations in serum and peritoneal fluid of women with ovarian endometriosis. Gynecol Endocrinol 2013; 29:455-9. [PMID: 23461865 DOI: 10.3109/09513590.2013.769516] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The aim of this study was to evaluate serum and peritoneal fluid (PF) glycodelin-A concentrations in women with ovarian endometriosis. Ninety-nine matched pairs of serum and PF samples were included in our study. The case group comprised 57 women with ovarian endometriosis and the control group 42 healthy women undergoing sterilization or patients with benign ovarian cysts. Glycodelin-A concentrations were measured using ELISA. Endometriosis patients had significantly higher serum and PF glycodelin-A concentrations compared to controls, and this increase was observed in both proliferative and secretory cycle phases. Glycodelin-A concentrations were more than 10-fold higher in PF than in serum and correlated with each other. Intensity and frequency of menstrual pain positively correlated with glycodelin-A concentrations. Sensitivity and specificity of glycodelin-A as a biomarker for ovarian endometriosis were 82.1% and 78.4% in serum, and 79.7% and 77.5% in PF, respectively. These results indicate that Glycodelin-A has a potential role as a biomarker to be used in combination with other, independent marker molecules.
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Yang X, Song Q, Mueller MD, Yu JJ. Abstract 2427: Molecular and pharmacokinetic studies of dicycloplatin, a new platinum analogue, suggest it is a promising chemotherapeutic agent. Cancer Res 2013. [DOI: 10.1158/1538-7445.am2013-2427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Dicycloplatin (DCP), a new platinum compound recently approved by the Chinese FDA, is a platinum-based supramolecule. The host-part (carboplatin) and a guest-part (cyclobutane-1,1-dicarboxylic acid or CBDC) are linked by hydrogen bonds. DCP has a stable chemical structure and good water solubility. Pharmacokinetic studies show that the prototype DCP concentration 2-h after administration is still high (17.1 μg/ml), after 26.9 μg/ml at 0.5 hour. In comparison, 5.01 μg/ml of carboplatin prototype is obtained 2-h after administration. Preclinical in vitro and in vivo studies and a phase I clinical trial demonstrated that DCP possesses significant antitumor activity, with fewer adverse effects than carboplatin. Molecular investigation of DCP-treated ovarian cancer A2780 cells showed activation of several kinases, including Chk2, p53, BRCA1 and other downstream factors. The increase in activated p-Chk2, p-p53 and p-BRCA1 after 1-h DCP exposure at IC50 dose occurred in a time-dependent manner. Quantitative analysis of phosphorylated Chk2 and BRCA1 expression revealed that the amount of dicycloplatin-induced phosphorylation of the two factors doubled at 48-h and tripled for p53 at 24-h, compared to controls. We observed that the DCP-induced activation profile and cisplatin-activated mechanisms are similar. We conclude that dicycloplatin is a promising platinum chemotherapeutic compound.
Citation Format: Xuqing Yang, Qinhua Song, Michael D. Mueller, Jing Jie Yu. Molecular and pharmacokinetic studies of dicycloplatin, a new platinum analogue, suggest it is a promising chemotherapeutic agent. [abstract]. In: Proceedings of the 104th Annual Meeting of the American Association for Cancer Research; 2013 Apr 6-10; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2013;73(8 Suppl):Abstract nr 2427. doi:10.1158/1538-7445.AM2013-2427
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Senn B, Eicher M, Mueller MD, Hornung R, Fink D, Baessler K, Hampl M, Denhaerynck K, Spirig R, Engberg S. A patient-reported outcome measure to identify occurrence and distress of post-surgery symptoms of WOMen with vulvAr Neoplasia (WOMAN-PRO) — A cross sectional study. Gynecol Oncol 2013; 129:234-40. [DOI: 10.1016/j.ygyno.2012.12.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 12/20/2012] [Accepted: 12/21/2012] [Indexed: 11/28/2022]
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Senn B, Eicher M, Mueller MD, Gafner D, Engberg S, Spirig R. [Development and validation of a patient reported outcome instrument for women with vulvar cancers and surgical treatment - a mixed method study]. Pflege 2013; 26:65-8. [PMID: 23384847 DOI: 10.1024/1012-5302/a000265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Klimek P, Klimek M, Kessler U, Oesch V, Wolf R, Stranzinger E, Mueller MD, Zachariou Z. Hematometra presenting as an acute abdomen in a 13-year-old postmenarchal girl: a case report. J Med Case Rep 2012; 6:419. [PMID: 23234497 PMCID: PMC3543215 DOI: 10.1186/1752-1947-6-419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Accepted: 11/06/2012] [Indexed: 11/12/2022] Open
Abstract
Introduction Most underlying diseases for abdominal pain in children are not dangerous. However some require rapid diagnosis and treatment, such as acute ovarian torsion or appendicitis. Since reaching a diagnosis can be difficult, and delayed treatment of potentially dangerous diseases might have significant consequences, exploratory laparoscopy is a diagnostic and therapeutic option for patients who have unclear and potentially hazardous abdominal diseases. Here we describe a case where the anomaly could not be identified using a laparoscopy in an adolescent girl with acute abdomen. Case presentation A 13-year old postmenarchal caucasian female presented with an acute abdomen. Emergency sonography could not exclude ovarian torsion. Accurate diagnosis and treatment were achieved only after an initial laparoscopy followed by a laparotomy and after a magnetic resonance imaging scan a further laparotomy. The underlying disease was hematometra of the right uterine horn in a uterus didelphys in conjunction with an imperforate right cervix. Conclusion This report demonstrates that the usual approach for patients with acute abdominal pain may not be sufficient in emergency situations.
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Senn B, Mueller MD, Hasenburg A, Blankenstein T, Kammermann B, Hartmann A, Donovan H, Eicher M, Spirig R, Engberg S. Development of a Postsurgical Patient-Reported Outcome Instrument for Women With Vulvar Neoplasia. Oncol Nurs Forum 2012; 39:E489-98. [DOI: 10.1188/12.onf.e489-e498] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Bersinger NA, Dechaud H, McKinnon B, Mueller MD. Analysis of cytokines in the peritoneal fluid of endometriosis patients as a function of the menstrual cycle stage using the Bio-Plex® platform. Arch Physiol Biochem 2012; 118:210-8. [PMID: 22632541 DOI: 10.3109/13813455.2012.687003] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Endometriosis is a painful disease affecting 10-15% of reproductive-age women. Concentrations of several cytokines and angiogenic factors in peritoneal fluid (PF) have been found to correlate with the severity of the disease. However, levels of some analytes vary across the menstrual cycle, and an ideal biomarker of endometriosis has not yet been identified. We have compared the PF concentrations of different cytokines in proliferative and secretory phases in women with and without the disease using the Bio-Plex platform. METHODS PF was aspirated during laparoscopy (N = 133) and the PF concentrations of 18 cytokines from Bio-Plex panels I and II determined with the serum protocol. RESULTS Increased PF concentrations of IL-6, IL-18, eotaxin, and MCP-1 were found in endometriosis with no changes with menstrual cycle. Levels of IL-12(p70), ICAM-1, and GRO-α were higher in the secretory phase, while eotaxin concentrations were lower. CONCLUSION Of the 18 cytokines tested, IL-6, IL-18 and MCP-1 were the best PF markers of endometriosis.
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Block M, Gründker C, Fister S, Kubin J, Wilkens L, Mueller MD, Hemmerlein B, Emons G, Günthert AR. Inhibition of the AKT/mTOR and erbB pathways by gefitinib, perifosine and analogs of gonadotropin-releasing hormone I and II to overcome tamoxifen resistance in breast cancer cells. Int J Oncol 2012; 41:1845-54. [PMID: 22922893 DOI: 10.3892/ijo.2012.1591] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 07/03/2012] [Indexed: 11/05/2022] Open
Abstract
Endocrine resistance in breast cancer remains a major clinical problem and is caused by crosstalk mechanisms of growth factor receptor cascades, such as the erbB and PI3K/AKT pathways. The possibilities a single breast cancer cell has to achieve resistance are manifold. We developed a model of 4-hydroxy-tamoxifen (OHT)‑resistant human breast cancer cell lines and compared their different expression patterns, activation of growth factor receptor pathways and compared cells by genomic hybridization (CGH). We also tested a panel of selective inhibitors of the erbB and AKT/mTOR pathways to overcome OHT resistance. OHT‑resistant MCF-7-TR and T47D-TR cells showed increased expression of HER2 and activation of AKT. T47D-TR cells showed EGFR expression and activated MAPK (ERK-1/2), whereas in resistant MCF-7-TR cells activated AKT was due to loss of CTMP expression. CGH analyses revealed remarkable aberrations in resistant sublines, which were predominantly depletions. Gefitinib inhibited erbB signalling and restored OHT sensitivity in T47D-TR cells. The AKT inhibitor perifosine restored OHT sensitivity in MCF-7-TR cells. All cell lines showed expression of receptors for gonadotropin-releasing hormone (GnRH) I and II, and analogs of GnRH-I/II restored OHT sensitivity in both resistant cell lines by inhibition of erbB and AKT signalling. In conclusion, mechanisms to escape endocrine treatment in breast cancer share similarities in expression profiling but are based on substantially different genetic aberrations. Evaluation of activated mediators of growth factor receptor cascades is helpful to predict response to specific inhibitors. Expression of GnRH-I/II receptors provides multi-targeting treatment strategies.
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Mueller MM, Baumann MU, Mueller MD, Kuhn A. A randomized comparison of microtip and air-charged catheter for the measurement of maximum urethral closure pressure. Ginekol Pol 2012; 83:586-589. [PMID: 23342881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
BACKGROUND Measurements of maximum urethral closure pressure (MUCP) are a part of urodynamic investigations preceding an incontinence surgery and a part of urethral function tests. OBJECTIVES The aim of the study was to compare maximum urethral closure pressure determined by a microtip catheter with those measured by an air-charged catheter. MATERIAL AND METHODS A prospective randomized study in a tertiary referral centre. 122 female patients with urodynamic stress incontinence were randomly assigned to have their urethral pressure profiles measured at rest by both microtip and air-charged catheters. INTERVENTION AND MEASUREMENTS Each patient had three measurements taken by each catheter type. Means of the measurements were compared with regard to correlation and repeatability. For statistical analysis, an approach proposed by Bland-Altman was applied to assess the agreement between the two techniques. RESULTS Correlation coefficient between MUCP by the air-charged and the microtip catheter was r=0.8507 (95% CI 0.7928 - 0.8934; p<0.0001). MUCP by the air-charged catheter was significantly lower than MUCP measured by the microtip catheter. The two-tailed p value was <0.0001, considered extremely significant. (95% CI of the differences; mean difference = -3.033; mean of paired differences -3.730 to -2.335). Discrepancies between measurements of the microtip and the air-charged catheters suggest good agreement between the two catheters since the mean difference was 2.8 cmH2O and the 95% CI of agreement were narrow with -0.03319 to 0.3151. CONCLUSION Air-charged catheters give lower readings for MUCP than microtip catheters with a good agreement between the two catheters.
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Günthert AR, Duclos K, Jahns BG, Krause E, Amann E, Limacher A, Mueller MD, Jüni P. Clinical scoring system for vulvar lichen sclerosus. J Sex Med 2012; 9:2342-50. [PMID: 22759453 DOI: 10.1111/j.1743-6109.2012.02814.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Vulvar lichen sclerosus (LS) is a chronic inflammatory and mutilating disease, which goes often undetected for years. Advanced disease severely affects quality of life like sexual disorders and is also associated with an increased risk of vulvar cancer. AIM To develop and validate a patient-administered symptom score and a physician-administered clinical score for the diagnosis and evaluation of vulvar LS. METHODS We included 24 patients with established LS diagnosis and 49 with other vulvar disease. The physician-administered score was based on six clinical features and the patient-administered score was a symptom-based four-item composite score. We determined inter-item correlations and internal consistency of both scores, and estimated sensitivities, specificities, likelihood ratios, and posttest probabilities for different cutoffs of the physician-administered score. MAIN OUTCOME MEASURES Characteristics of patients with and without LS were compared using χ(2) and unpaired t-test as required. We then determined Cronbach's alpha as a measure of the overall consistency of scores and calculated positive and negative likelihoods. RESULTS Lack of redundancy of items (correlation coefficients < 0.90) and internal consistency (Cronbach's α ≥ 0.70) suggested that final composite scores were valid and yielded excellent power to rule in LS. CONCLUSION Scores may be useful for assessing symptoms of vulvar disorders, to ease diagnosis of LS and to evaluate treatment response over time.
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