1
|
Gómez-Menchero J, Balla A, García Moreno JL, Gila Bohorquez A, Bellido-Luque JA, Morales-Conde S. Laparoscopic intracorporeal rectus aponeuroplasty (LIRA) technique versus intraperitoneal onlay mesh (IPOM plus) for ventral hernia repair: a comparative analysis. Hernia 2024; 28:167-177. [PMID: 37592164 DOI: 10.1007/s10029-023-02858-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 08/07/2023] [Indexed: 08/19/2023]
Abstract
PURPOSE Primary aim of this study is to compare the postoperative outcomes of the laparoscopic intracorporeal rectus aponeuroplasty (LIRA) technique to the intraperitoneal onlay mesh closing the defect (IPOM plus), in terms of recurrence and bulging rates at one-year follow-up; secondary aim is to compare the postoperative complications, seroma and pain at 30 days and one-year after surgery. METHODS Patients with midline ventral hernia of 4-10 cm in width were included. Computed tomography scan was performed before, 1 and 12 months after surgery. Pain was evaluated using the visual analogue scale. RESULTS Forty-five and forty-seven consecutive patients underwent LIRA and IPOM plus, respectively. Preoperatively, smoke habits and chronic obstructive pulmonary disease rates were statistically significantly higher in the LIRA group (p = 0.0001 and p = 0.012, respectively). Two bulgings (4.4%) occurred in the LIRA group, while in the IPOM plus group occurred 10 bulgings (21.3%) and three recurrences (6.4%) (p = 0.017 and p = 0.085, respectively). Postoperatively, seven (15.6%, Clavien-Dindo I) and four complications (8.5%, two Clavien-Dindo I, two Clavien-Dindo III-b) occurred in the LIRA and in the IPOM plus group, respectively (p = 0.298). One month after surgery, clinical seroma, occurred in five (11.1%) and eight patients (17%) in the LIRA and in the IPOM plus group, respectively (p = 0.416). During follow-up, pain reduction occurred, without statistically significant differences. CONCLUSIONS In this study, even if we analysed a small series, LIRA showed lower bulging and recurrence rates in comparison to IPOM plus at one-year follow-up. Further prospective studies, with a large sample of patients and longer follow-up are required to draw definitive conclusions.
Collapse
Affiliation(s)
- J Gómez-Menchero
- Unit of General and Digestive Surgery, Hospital de Río Tinto, Huelva, Spain
- Unit of General and Digestive Surgery, Hospital Quirónsalud Sagrado Corazón, Seville, Spain
| | - A Balla
- Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital "Virgen del Rocio", University of Sevilla, Seville, Spain.
- Coloproctology and Inflammatory Bowel Disease Surgery Unit, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy.
| | - J L García Moreno
- Unit of General and Digestive Surgery, Hospital de Río Tinto, Huelva, Spain
| | - A Gila Bohorquez
- Unit of General and Digestive Surgery, Hospital de Río Tinto, Huelva, Spain
| | - J A Bellido-Luque
- Department of General Surgery, University Hospital "Virgen Macarena", Seville, Spain
| | - S Morales-Conde
- Unit of General and Digestive Surgery, Hospital Quirónsalud Sagrado Corazón, Seville, Spain
- Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital "Virgen del Rocio", University of Sevilla, Seville, Spain
| |
Collapse
|
2
|
Ortenzi M, Botteri E, Balla A, Podda M, Montori G, Sartori A. Nationwide analysis of open groin hernia repairs in Italy from 2015 to 2020. Hernia 2023; 27:1429-1437. [PMID: 37847334 DOI: 10.1007/s10029-023-02902-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 09/22/2023] [Indexed: 10/18/2023]
Abstract
INTRODUCTION Inguinal hernia repair is one of the most commonly performed operations in general surgery. A total of 130.000 inguinal hernia repairs are performed yearly in Italy, and approximately 20 million inguinal hernias are treated worldwide annually. This report represents the trend analysis in inguinal hernia repair in Italy from a nationwide dataset for the 6-year period from 2015 to 2020. MATERIALS AND METHODS Based on regional hospital discharge records, all the inguinal hernia repairs performed in public and private hospitals in Italy between 2015 and 2020 were reviewed based on diagnosis and procedure codes. For the aim of this study, data from the AgeNas (The National Agency for Regional Health Services) data source were analyzed. RESULTS Elective inguinal hernia repairs outnumbered urgent operations over the 6-year study period, ranging from 122,737 operations in 2015 to 65,780 in 2020 as absolute numbers, and from 87.96 to 83.3% of total procedures in 2019 and 2020 respectively, with an annual change ranging from - 66.58%, between 2020 and 2019, to - 2.49%, between 2019 and 2018 (mean = - 18.74%; CI =- 46.7%-9.22%; p < 0.0001). CONCLUSIONS This large-scale review of groin hernia data from a nationwide Italian dataset provides a unique opportunity to obtain a snapshot of open groin hernia repair activity. More specifically, there is a trend to perform more elective than urgent procedures and there is a steady decrease in the amount of open hernia repairs in favor to laparoscopy.
Collapse
Affiliation(s)
- M Ortenzi
- Department of General Surgery, Università Politecnica delle Marche, Piazza Roma 22, 60121, Ancona, Italy.
| | - E Botteri
- ASST Spedali Civili Di Brescia PO Montichiari, Via Boccalera 325018, Montichiari, Brescia, Italy
| | - A Balla
- Coloproctology and Inflammatory Bowel Disease Surgery Unit, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - M Podda
- Department of Surgical Science, University of Cagliari, Cagliari, Italy
| | - G Montori
- Department of General Surgery, Ospedale Di Vittorio Veneto-ULSS2 Marca Trevigiana, Via Forlanini, 71, 31029, Vittorio Veneto, Treviso, Italy
| | - A Sartori
- Department of General Surgery, Ospedale Di Montebelluna, Via Palmiro Togliatti, 16, 31044, Montebelluna, Treviso, Italy
| |
Collapse
|
3
|
Corallino D, Balla A, Palmieri L, Sperduti I, Ortenzi M, Guerrieri M, Paganini AM. Is transperitoneal laparoscopic adrenalectomy for pheochromocytoma really more challenging? A propensity score-matched analysis. J Endocrinol Invest 2023:10.1007/s40618-023-02013-7. [PMID: 36705839 DOI: 10.1007/s40618-023-02013-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 01/12/2023] [Indexed: 01/28/2023]
Abstract
PURPOSE Minimally invasive surgery is the gold standard treatment for adrenal masses, but it may be a challenging procedure in the case of pheochromocytoma (PHEO). The aim of the present study is to report the results of transperitoneal laparoscopic adrenalectomy (TLA) in cases of PHEO in comparison to other types of adrenal lesions. METHODS From 1994 to 2021, 629 patients underwent adrenalectomy. Twenty-two and thirty-five patients, respectively, were excluded because they underwent bilateral and open adrenalectomy, leaving 572 patients for inclusion. Of these, 114 patients had PHEO (Group A), and 458 had other types of lesions (Group B). To adjust for potential baseline confounders, a propensity score matching (PSM) analysis was conducted. RESULTS After PSM, 114 matched pairs of patients were identified from each group. Statistically significant differences were not observed when comparing the median operative time (85 and 90 min in Groups A and B, respectively, p = 0.627), conversion rate [6 (5.3%) in each group, p = 1.000], transfusion rate [4 (3.5%) and 3 (2.6%) in Groups A and B, respectively, p = 1.000], complication rate [7 (6.1%) and 9 (7.9%) in Groups A and B, respectively, p = 0.796), median postoperative hospital stay (3.9 and 3.6 days in Groups A and B, respectively, p = 0.110), and mortality rate [1 (0.9%) in each group, p = 1.000]. CONCLUSIONS Based on this analysis, the results of TLA for PHEO are equivalent to those of TLA for other types of adrenal lesions, but the fundamental requirements are multidisciplinary patient management and adequate surgeon experience. Further prospective studies are required to draw definitive conclusions.
Collapse
Affiliation(s)
- D Corallino
- Department of General Surgery and Surgical Specialties, Sapienza University of Rome, Viale del Policlinico 155, 00161, Rome, Italy.
| | - A Balla
- UOC of General and Minimally Invasive Surgery, Hospital "San Paolo", Largo Donatori del Sangue 1, 00053, Civitavecchia, Rome, Italy
| | - L Palmieri
- Department of General Surgery and Surgical Specialties, Sapienza University of Rome, Viale del Policlinico 155, 00161, Rome, Italy
| | - I Sperduti
- Department of Biostatistics, IRCCS Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144, Rome, Italy
| | - M Ortenzi
- Department of General Surgery, Università Politecnica Delle Marche, Piazza Roma 22, 60121, Ancona, Italy
| | - M Guerrieri
- Department of General Surgery, Università Politecnica Delle Marche, Piazza Roma 22, 60121, Ancona, Italy
| | - A M Paganini
- Department of General Surgery and Surgical Specialties, Sapienza University of Rome, Viale del Policlinico 155, 00161, Rome, Italy
| |
Collapse
|
4
|
Sista F, Carandina S, Andreica A, Zulian V, Pietroletti R, Cappelli S, Balla A, Nedelcu M, Clementi M. Long-term results of laparoscopic gastric sleeve: the importance of follow-up adherence. Eur Rev Med Pharmacol Sci 2022; 26:6691-6699. [PMID: 36196719 DOI: 10.26355/eurrev_202209_29770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
OBJECTIVE This study was conducted to assess the long-term results of the Laparoscopic Sleeve Gastrectomy (LSG) in patients not compliant with follow-up, and in patients who completed a postoperative follow-up program. PATIENTS AND METHODS The data concerning LSG patients operated from February 2011 to December 2013 were retrospectively reviewed basing on a single center database. The patients with complete long-term follow-up were scheduled in Group A, while patients who failed to attend controls for more than two years were scheduled in Group B. Long-term results (weight loss, comorbidity improvement and late complications) were compared between the two groups. RESULTS The study population consisted of 285 patients. Of these, 101 had a complete follow-up with a mean duration of 71 ± 7.6 months (Group A). The remaining 184 patients (Group B) were not compliant with follow-up and, consequently, the mean duration of follow-up was 5.5 ± 7.3 months (p < 0.00001). A higher number of patients with insufficient weight loss was recorded in Group B with respect to Group A (78 vs. 23; p = 0.001). The number of patients with results below 25% EWL was significantly higher in Group B than in Group A (24 vs. 5; p = 0.04). In the long-term, the rate of patients with symptomatic reflux requiring medical treatment was two-fold higher in Group B than in Group A. CONCLUSIONS The adherence to a long-term follow-up plan after LSG seems to decrease the number of patients experiencing insufficient weight loss and those at risk for developing a gastro-esophageal reflux disease.
Collapse
Affiliation(s)
- F Sista
- San Salvatore Hospital, Department of Surgery, L'Aquila, Italy.
| | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Sartori A, Balla A, Botteri E, Scolari F, Podda M, Lepiane P, Guerrieri M, Morales-Conde S, Szold A, Ortenzi M. Laparoscopic approach in emergency for the treatment of acute incarcerated groin hernia: a systematic review and meta-analysis. Hernia 2022; 27:485-501. [PMID: 35618958 DOI: 10.1007/s10029-022-02631-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 05/05/2022] [Indexed: 11/26/2022]
Abstract
PURPOSE Minimally invasive approach for acute incarcerated groin hernia repair is still debated. To clarify this debate, a literature review was performed. METHODS Search was performed in PubMed, Embase, Scopus, Web of Science, and Cochrane databases, founding 28,183 articles. RESULTS Fifteen articles, and 433 patients were included (16 bilateral hernia, range 3-8). Three hundred and eighty-eight (75.3%) and 103 patients (22.9%) underwent transabdominal preperitoneal and totally extraperitoneal repair, respectively, and in 5 patients, the defect was buttressed with broad ligament (1.1%) (not specified in 3 patients). Herniated structures were resected in 48 cases (range 1-9). Intraoperative complications and conversion occurred in 4 (range 0-1) and 10 (range 0-3) patients, respectively. Mean operative time and hospital stay ranged between 50 and 147 min, and 2 and 7 days, respectively. Postoperative complications ranged between 1 and 19. Five studies compared laparoscopic and open approaches (163 and 235 patients). Herniated structures were resected in 19 (11.7%) and 42 cases (17.9%) for laparoscopic and open approach, respectively (p = 0.1191). Intraoperative complications and conversion occurred in one (0.6%) and 5 (2.1%) patients (p = 0.4077), and in two (1.2%) and 19 (8.1%) patients (p = 0.0023), in case of laparoscopic or open approach, respectively. Mean operative time and hospital stay were 94.4 ± 40.2 and 102.8 ± 43.7 min, and 4.8 ± 2.2 and 11 ± 3.1 days, in laparoscopic or open approach, respectively. Sixteen (9.8%) and 57 (24.3%) postoperative complications occurred. CONCLUSION Laparoscopy seems to be a safe and feasible approach for the treatment of acute incarcerated groin hernia. Further studies are required for definitive conclusions.
Collapse
Affiliation(s)
- A Sartori
- Department of General Surgery, Ospedale Di Montebelluna, Via Palmiro Togliatti, 16, 31044, Montebelluna, Treviso, Italy
| | - A Balla
- UOC of General and Minimally Invasive Surgery, Hospital "San Paolo", Largo Donatori del Sangue 1, 00053, Civitavecchia, Rome, Italy.
| | - E Botteri
- General Surgery, ASST Spedali Civili Di Brescia PO Montichiari, Via Boccalera 325018, Montichiari, Brescia, Italy
| | - F Scolari
- Department of General Surgery, Ospedale Di Montebelluna, Via Palmiro Togliatti, 16, 31044, Montebelluna, Treviso, Italy
| | - M Podda
- Department of Surgical Science, University of Cagliari, Cagliari, Italy
| | - P Lepiane
- UOC of General and Minimally Invasive Surgery, Hospital "San Paolo", Largo Donatori del Sangue 1, 00053, Civitavecchia, Rome, Italy
| | - M Guerrieri
- Department of General Surgery, Università Politecnica Delle Marche, Piazza Roma 22, 60121, Ancona, Italy
| | - S Morales-Conde
- Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital "Virgen del Rocio", University of Seville, Seville, Spain
| | - A Szold
- Assia Medical, Assuta Medical Center, Tel Aviv, Israel
| | - M Ortenzi
- Department of General Surgery, Università Politecnica Delle Marche, Piazza Roma 22, 60121, Ancona, Italy
| |
Collapse
|
6
|
Vigneswaran H, Uyanik M, Xie K, Macias V, Balla A, Magin R, Cai K, Damen F, Zhou X, Gann P, Abern M. Biparametric quantitative MRI for prostate cancer detection. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00812-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
7
|
Baratta F, Pastori D, Angelico F, Balla A, Paganini A, Cocomello N, Ferro D, Violi F, Sanyal A, Del Ben M. Liver fibrosis and cardiovascular events in non-alcoholic fatty liver disease. The prospective cohort plinio study. Atherosclerosis 2020. [DOI: 10.1016/j.atherosclerosis.2020.10.149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
8
|
Morales-Conde S, Licardie E, Alarcón I, Balla A. Indocyanine-green-guided, ureteric preserving, laparoscopic Hartmann's procedure for obstructing colonic adenocarcinoma with endometriosis - a video vignette. Colorectal Dis 2020; 22:1764-1765. [PMID: 32443174 DOI: 10.1111/codi.15149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 05/11/2020] [Indexed: 02/08/2023]
Affiliation(s)
- S Morales-Conde
- Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital 'Virgen del Rocio', Sevilla, Spain
| | - E Licardie
- Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital 'Virgen del Rocio', Sevilla, Spain
| | - I Alarcón
- Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital 'Virgen del Rocio', Sevilla, Spain
| | - A Balla
- Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital 'Virgen del Rocio', Sevilla, Spain.,Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza, University of Rome, Rome, Italy
| |
Collapse
|
9
|
Balla A, Sosa V, Licardie E, Alarcón I, Morales-Conde S. Laparoscopic left hemicolectomy with indocyanine green fluorescence angiography for diverticular disease in a patient with intestinal malrotation - a video vignette. Colorectal Dis 2019; 21:978-979. [PMID: 31063252 DOI: 10.1111/codi.14670] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 04/02/2019] [Indexed: 02/08/2023]
Affiliation(s)
- A Balla
- Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital 'Virgen del Rocio', Seville, Spain.,Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza, University of Rome, Rome, Italy
| | - V Sosa
- Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital 'Virgen del Rocio', Seville, Spain
| | - E Licardie
- Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital 'Virgen del Rocio', Seville, Spain
| | - I Alarcón
- Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital 'Virgen del Rocio', Seville, Spain
| | - S Morales-Conde
- Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital 'Virgen del Rocio', Seville, Spain
| |
Collapse
|
10
|
Ashvini HM, Balla A, Mutta SK. Clarithromycin-loaded Chitosan Nanoparticles: Preparation, Characterisation and Antibacterial Activity on Streptococcus pneumonia. Indian J Pharm Sci 2019. [DOI: 10.36468/pharmaceutical-sciences.511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
11
|
Quaresima S, Paganini AM, D'Ambrosio G, Ursi P, Balla A, Lezoche E. A modified sentinel lymph node technique combined with endoluminal loco-regional resection for the treatment of rectal tumours: a 14-year experience. Colorectal Dis 2017; 19:1100-1107. [PMID: 28614625 DOI: 10.1111/codi.13768] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 03/20/2017] [Accepted: 04/15/2017] [Indexed: 12/14/2022]
Abstract
AIM After endoluminal loco-regional resection (ELRR) by transanal endoscopic microsurgey (TEM) the N parameter may remain undefined. Nucleotide-guided mesorectal excision (NGME) improves the lymph node harvest. The aim of the present study is to evaluate the long-term oncological results after ELRR with NGME. METHOD A total of 57 patients were enrolled over the period January 2001 to June 2015. All patients underwent ELRR by TEM. Prior to surgery, 99 m-technetium-marked nanocolloid was injected into the peritumoural submucosa. After removal of the specimen, the residual defect was probed to detect any residual radioactivity and 'hot' mesorectal fat was excised. All patients were included in a 5-year follow-up programme. RESULTS Significant radioactivity in the residual cavity was found in 28 out of 57 patients (49%). The mean number of lymph nodes harvest in irradiated and nonirradiated patients was 1.66 and 2.76, respectively. After 68.2 months' follow-up overall survival was 91.2%, disease-related mortality 3.5% and disease-free survival 89.5%. Two patients developed pulmonary metastases: one ypT3N0 patient underwent lung lobectomy after chemotherapy and one pT2N0 patient was managed with lung radiotherapy. Both patients are currently alive and disease-free at 48 months' follow-up. Two patients developed local recurrence 1 year after ELRR, both treated with neoadjuvant chemo-radiotherapy and total mesorectal excision. Comparing the present series with previous patients who did not undergo NGME, an increased number of harvested lymph nodes were observed, with a statistically significant difference (P = 0.0085). CONCLUSION NGME during ELRR improves the lymph node harvest and staging accuracy. The long-term results showed satisfactory local (3.5%) and distant (7%) recurrence rates.
Collapse
Affiliation(s)
- S Quaresima
- Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza University of Rome, Rome, Italy
| | - A M Paganini
- Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza University of Rome, Rome, Italy
| | - G D'Ambrosio
- Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza University of Rome, Rome, Italy
| | - P Ursi
- Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza University of Rome, Rome, Italy
| | - A Balla
- Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza University of Rome, Rome, Italy
| | - E Lezoche
- Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza University of Rome, Rome, Italy
| |
Collapse
|
12
|
Biviano I, Balla A, Badiali D, Quaresima S, D'Ambrosio G, Lezoche E, Corazziari E, Paganini AM. Anal function after endoluminal locoregional resection by transanal endoscopic microsurgery and radiotherapy for rectal cancer. Colorectal Dis 2017; 19:O177-O185. [PMID: 28304143 DOI: 10.1111/codi.13656] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 12/29/2016] [Indexed: 12/16/2022]
Abstract
AIM In patients with rectal cancer, surgery and chemoradiotherapy may affect anal sphincter function. Few studies have evaluated anorectal function after neoadjuvant chemoradiotherapy (n-CRT) and/or transanal endoscopic microsurgery (TEM). The aim of this study was to evaluate the effects of n-CRT and TEM on anorectal function. METHOD Thirty-seven patients with rectal cancer underwent anorectal manometry and Wexner scoring for faecal incontinence at baseline, after n-CRT (cT2-T3N0 cancer) and at 4 and 12 months after surgery. Water-perfused manometry measured anal tone at rest and during squeezing, rectal sensitivity and compliance. Twenty-seven and 10 patients, respectively, underwent TEM without (Group A) or with n-CRT (Group B). RESULTS In Group A, anal resting pressure decreased from 68 ± 23 to 54 ± 26 mmHg at 4 months (P = 0.04) and improved 12 months after surgery (60 ± 30 mmHg). The Wexner score showed a significant increase in gas incontinence (59%), soiling (44%) and urgency (37%) rates at 4 months, followed by clinical improvement at 1 year (41%, 26% and 18%, respectively). In group B, anal resting pressure decreased from 65 ± 23 to 50 ± 18 mmHg at 4 months but remained stable at 12 months (44 ± 11 mmHg, P = 0.02 vs preoperative values - no significant difference compared with evaluation at 4 months). Gas incontinence, soiling and urgency were observed in 50%, 50%, 25% and in 38%, 12% and 12% of cases, respectively, 4 and 12 months after treatment. CONCLUSION TEM does not significantly affect anal function. Instead, n-CRT does affect anal function but without causing major anal incontinence.
Collapse
Affiliation(s)
- I Biviano
- Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
| | - A Balla
- Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza University of Rome, Rome, Italy
| | - D Badiali
- Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
| | - S Quaresima
- Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza University of Rome, Rome, Italy
| | - G D'Ambrosio
- Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza University of Rome, Rome, Italy
| | - E Lezoche
- Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza University of Rome, Rome, Italy
| | - E Corazziari
- Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
| | - A M Paganini
- Department of General Surgery and Surgical Specialties 'Paride Stefanini', Sapienza University of Rome, Rome, Italy
| |
Collapse
|
13
|
Balla A, Batista Rodríguez G, Buonomo N, Martinez C, Hernández P, Bollo J, Targarona EM. Perineal hernia repair after abdominoperineal excision or extralevator abdominoperineal excision: a systematic review of the literature. Tech Coloproctol 2017; 21:329-336. [PMID: 28508281 DOI: 10.1007/s10151-017-1634-8] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 05/01/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND The incidence of perineal hernia after abdominoperineal excision and extralevator abdominoperineal excision ranges from 1 to 26%. In this systematic review, we compared surgical options and postoperative outcomes of perineal hernia repair in this setting from 2012 to 2016 with findings in a review of publications 1944-2011. METHODS We searched the PubMed database using the keywords "hernia" AND "perineum" identified 392 papers published from 1946 to 2016. Two hundred and ninety-six papers published before 2012 were excluded and 96 were found to be potentially relevant. RESULTS Twenty-one studies with a total of 108 patients were included in the final analysis. Perineal hernia repair was performed using the perineal approach in 75 patients (69.44%), the laparoscopic approach in 25 patients (23.14%), the open abdominal approach in three patients (2.77%) and the laparoscopic perineal approach in three patients (2.77%) and the open abdominoperineal approach in two patients (1.8%). Non-absorbable mesh was used in 41 (37.96%) of cases, composite mesh in 20 (18.51%) and biological mesh in 19 (17.59%). Flap reconstruction was used in 25 patients (23.14%). First and second recurrences were observed in 26 (24.07%) and 7 (26.92%) cases, respectively. CONCLUSIONS Comparison of perineal hernia repair from 1944 to 2011 and from 2012 to 2016 showed that perineal and laparoscopic approaches are currently the most commonly used techniques. Primary defect closure was abandoned in favor of synthetic or composite mesh placement. Use of flap reconstruction spread rapidly and the recurrence rate was low. Randomized control trials and a larger sample size are needed to confirm these data and to develop a gold standard treatment for secondary hernia repair after abdominoperineal excision or extralevator abdominoperineal excision.
Collapse
Affiliation(s)
- A Balla
- General and Digestive Surgery Unit, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Carrer Sant Antoni Maria Claret, 167, 08025, Barcelona, Spain. .,Department of General Surgery and Surgical Specialties "Paride Stefanini", Sapienza, University of Rome, Rome, Italy.
| | - G Batista Rodríguez
- General and Digestive Surgery Unit, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Carrer Sant Antoni Maria Claret, 167, 08025, Barcelona, Spain.,Surgical Oncology Unit, Department of Hemato-Oncology, Dr. Rafael A. Calderón Guardia Hospitall, San José, Costa Rica
| | - N Buonomo
- General and Digestive Surgery Unit, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Carrer Sant Antoni Maria Claret, 167, 08025, Barcelona, Spain.,Division of Surgical Physiopathology, Department of General and Digestive Surgery, Università degli Studi della Campania "Luigi Vanvitelli", Naples, Italy
| | - C Martinez
- General and Digestive Surgery Unit, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Carrer Sant Antoni Maria Claret, 167, 08025, Barcelona, Spain
| | - P Hernández
- General and Digestive Surgery Unit, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Carrer Sant Antoni Maria Claret, 167, 08025, Barcelona, Spain
| | - J Bollo
- General and Digestive Surgery Unit, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Carrer Sant Antoni Maria Claret, 167, 08025, Barcelona, Spain
| | - E M Targarona
- General and Digestive Surgery Unit, Hospital de la Santa Creu i Sant Pau, Universidad Autónoma de Barcelona, Carrer Sant Antoni Maria Claret, 167, 08025, Barcelona, Spain
| |
Collapse
|
14
|
Bruzzone P, Balla A, Quaresima S, Seitaj A, Intini G, Giannarelli D, Paganini AM. Comparison of Two Questionnaires on Informed Consent in "Marginal" Donor Liver. Transplant Proc 2017; 48:359-61. [PMID: 27109955 DOI: 10.1016/j.transproceed.2015.12.053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 12/30/2015] [Indexed: 11/25/2022]
Abstract
The necessity of liver donors has contributed to overcoming the traditional criteria and to propose new ones for the acceptance of livers for transplantation. For this reason expanded or extended criteria donation (ECD) or even overextended criteria for marginal or high-risk organ donors have been developed. Ethical, Legal and Psychological Aspects of Organ Transplantation (ELPAT) and European Liver and Intestine Transplant Association (ELITA) - European Liver Transplantation Registry (ELTR) coordinated the distribution of a previously reported questionnaire that was sent to 53 European liver transplant centers. Criteria were divided based on the response rate. Donor criteria such as steatosis and serum sodium >165 mmol/L, as well as recipient criteria such as previous history of cancer, were not considered contraindications to transplantation in more than 60% of cases. Criteria such as ICU (intensive care unit) stay, body mass index >30, serum bilirubin >3 mg/dL, and HIV infection or critical illness were not considered adequate for transplantation in 30% to 59% of cases. On the other hand, there was no agreement on other extended liver donor and recipient criteria, such as age up to 80 years, serum glutamic oxaloacetic transaminase >90 U/L, serum glutamic pyruvic transaminase >105 U/L, high-risk sex practices, drug users, patients older than 65 years, and patients younger than 65 years, respectively. Criteria such as serum sodium could not be considered ECD criteria. In conclusion, development of more studies and inclusion of more liver transplantation centers are required to confirm these data.
Collapse
Affiliation(s)
- P Bruzzone
- Department of General Surgery, Surgical Specialties and Organ Transplantation "Paride Stefanini," Sapienza University, Rome, Italy.
| | - A Balla
- Department of General Surgery, Surgical Specialties and Organ Transplantation "Paride Stefanini," Sapienza University, Rome, Italy
| | - S Quaresima
- Department of General Surgery, Surgical Specialties and Organ Transplantation "Paride Stefanini," Sapienza University, Rome, Italy
| | - A Seitaj
- Department of General Surgery, Surgical Specialties and Organ Transplantation "Paride Stefanini," Sapienza University, Rome, Italy
| | - G Intini
- Department of General Surgery, Surgical Specialties and Organ Transplantation "Paride Stefanini," Sapienza University, Rome, Italy
| | | | - A M Paganini
- Department of General Surgery, Surgical Specialties and Organ Transplantation "Paride Stefanini," Sapienza University, Rome, Italy
| |
Collapse
|
15
|
Szentpetery Z, Balla A, Kim YJ, Lemmon MA, Balla T. Live cell imaging with protein domains capable of recognizing phosphatidylinositol 4,5-bisphosphate; a comparative study. BMC Cell Biol 2009; 10:67. [PMID: 19769794 PMCID: PMC2755470 DOI: 10.1186/1471-2121-10-67] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Accepted: 09/21/2009] [Indexed: 11/24/2022] Open
Abstract
Background Phosphatidylinositol 4,5-bisphosphate [PtdIns(4,5)P2] is a critically important regulatory phospholipid found in the plasma membrane of all eukaryotic cells. In addition to being a precursor of important second messengers, PtdIns(4,5)P2 also regulates ion channels and transporters and serves the endocytic machinery by recruiting clathrin adaptor proteins. Visualization of the localization and dynamic changes in PtdIns(4,5)P2 levels in living cells is critical to understanding the biology of PtdIns(4,5)P2. This has been mostly achieved with the use of the pleckstrin homology (PH) domain of PLCδ1 fused to GFP. Here we report on a comparative analysis of several recently-described yeast PH domains as well as the mammalian Tubby domain to evaluate their usefulness as PtdIns(4,5)P2 imaging tools. Results All of the yeast PH domains that have been previously shown to bind PtdIns(4,5)P2 showed plasma membrane localization but only a subset responded to manipulations of plasma membrane PtdIns(4,5)P2. None of these domains showed any advantage over the PLCδ1PH-GFP reporter and were compromised either in their expression levels, nuclear localization or by causing peculiar membrane structures. In contrast, the Tubby domain showed high membrane localization consistent with PtdIns(4,5)P2 binding and displayed no affinity for the soluble headgroup, Ins(1,4,5)P3. Detailed comparison of the Tubby and PLCδ1PH domains showed that the Tubby domain has a higher affinity for membrane PtdIns(4,5)P2 and therefore displays a lower sensitivity to report on changes of this lipid during phospholipase C activation. Conclusion These results showed that both the PLCδ1PH-GFP and the GFP-Tubby domain are useful reporters of PtdIns(4,5)P2 changes in the plasma membrane, with distinct advantages and disadvantages. While the PLCδ1PH-GFP is a more sensitive reporter, its Ins(1,4,5)P3 binding may compromise its accuracy to measure PtdIns(4,5)P2changes. The Tubby domain is more accurate to report on PtdIns(4,5)P2 but its higher affinity and lower sensitivity may limit its utility when phospholipase C activation is only moderate. These studies also demonstrated that similar changes in PtdIns(4,5)P2 levels in the plasma membrane can differentially regulate multiple effectors if they display different affinities to PtdIns(4,5)P2.
Collapse
Affiliation(s)
- Zsofia Szentpetery
- Sections on Molecular Signal Transduction, Program for Developmental Neuroscience, NICHD, National Institutes of Health, Bethesda, MD 20892, USA.
| | | | | | | | | |
Collapse
|
16
|
Abstract
Phosphoinositide kinases such as PI3-kinase synthesize lipid second messengers that control diverse cellular processes. Recently, these enzymes have emerged as an important class of drug targets, and there is significant interest in discovering new lipid kinase inhibitors. We describe here a procedure for the high-throughput determination of lipid kinase inhibitor IC50 values. This assay exploits the fact that phosphoinositides, but not nucleotides such as ATP, bind irreversibly to nitrocellulose membranes. As a result, the radiolabeled lipids from a kinase assay can be isolated by spotting the crude reaction on a nitrocellulose membrane and then washing. We show that diverse phosphoinositide kinases can be assayed using this approach and outline how to perform the assay in 96-well plates. We also describe a MATLAB script that automates the data analysis. The complete procedure requires 3-4 h.
Collapse
Affiliation(s)
- Zachary A Knight
- Department of Cellular & Molecular Pharmacology, Howard Hughes Medical Institute, University of California, San Francisco, California 94158, USA
| | | | | | | | | |
Collapse
|
17
|
Balla A, Tuymetova G, Toth B, Szentpetery Z, Zhao X, Knight ZA, Shokat K, Steinbach PJ, Balla T. Design of drug-resistant alleles of type-III phosphatidylinositol 4-kinases using mutagenesis and molecular modeling. Biochemistry 2008; 47:1599-607. [PMID: 18205404 DOI: 10.1021/bi7017927] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Molecular modeling and site directed mutagenesis were used to analyze the structural features determining the unique inhibitor sensitivities of type-III phosphatidylinositol 4-kinase enzymes (PI4Ks). Mutation of a highly conserved Tyr residue that provides the bottom of the hydrophobic pocket for ATP yielded a PI4KIIIbeta enzyme that showed greatly reduced wortmannin sensitivity and was catalytically still active. Similar substitutions were not tolerated in the type-IIIalpha enzyme rendering it catalytically inactive. Two conserved Cys residues located in the active site of PI4KIIIalpha were found responsible for the high sensitivity of this enzyme to the oxidizing agent, phenylarsine oxide. Mutation of one of these Cys residues reduced the phenylarsine oxide sensitivity of the enzyme to the same level observed with the PI4KIIIbeta protein. In search of inhibitors that would discriminate between the closely related PI4KIIIalpha and -IIIbeta enzymes, the PI3Kgamma inhibitor, PIK93, was found to inhibit PI4KIIIbeta with significantly greater potency than PI4KIIIalpha. These studies should aid development of subtype-specific inhibitors of type-III PI4Ks and help to better understand the significance of localized PtdIns4P production by the various PI4Ks isoforms in specific cellular compartments.
Collapse
Affiliation(s)
- Andras Balla
- Section on Molecular Signal Transduction, Center for Developmental Neuroscience, NICHD, National Institutes of Health, Bethesda, Maryland 20892-4510, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Balla A, Kim YJ, Varnai P, Szentpetery Z, Knight Z, Shokat KM, Balla T. Maintenance of hormone-sensitive phosphoinositide pools in the plasma membrane requires phosphatidylinositol 4-kinase IIIalpha. Mol Biol Cell 2007; 19:711-21. [PMID: 18077555 DOI: 10.1091/mbc.e07-07-0713] [Citation(s) in RCA: 153] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Type III phosphatidylinositol (PtdIns) 4-kinases (PI4Ks) have been previously shown to support plasma membrane phosphoinositide synthesis during phospholipase C activation and Ca(2+) signaling. Here, we use biochemical and imaging tools to monitor phosphoinositide changes in the plasma membrane in combination with pharmacological and genetic approaches to determine which of the type III PI4Ks (alpha or beta) is responsible for supplying phosphoinositides during agonist-induced Ca(2+) signaling. Using inhibitors that discriminate between the alpha- and beta-isoforms of type III PI4Ks, PI4KIIIalpha was found indispensable for the production of phosphatidylinositol 4-phosphate (PtdIns4P), phosphatidylinositol 4,5-bisphosphate [PtdIns(4,5)P(2)], and Ca(2+) signaling in angiotensin II (AngII)-stimulated cells. Down-regulation of either the type II or type III PI4K enzymes by small interfering RNA (siRNA) had small but significant effects on basal PtdIns4P and PtdIns(4,5)P(2) levels in (32)P-labeled cells, but only PI4KIIIalpha down-regulation caused a slight impairment of PtdIns4P and PtdIns(4,5)P(2) resynthesis in AngII-stimulated cells. None of the PI4K siRNA treatments had a measurable effect on AngII-induced Ca(2+) signaling. These results indicate that a small fraction of the cellular PI4K activity is sufficient to maintain plasma membrane phosphoinositide pools, and they demonstrate the value of the pharmacological approach in revealing the pivotal role of PI4KIIIalpha enzyme in maintaining plasma membrane phosphoinositides.
Collapse
Affiliation(s)
- Andras Balla
- Section on Molecular Signal Transduction, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | | | | | | | | | | | | |
Collapse
|
19
|
Abstract
The membrane phospholipid phosphatidylinositol 4,5-bisphosphate [PtdIns(4,5)P2 or PIP2] regulates many ion channels. There are conflicting reports on the effect of PtdIns(4,5)P2 on transient receptor potential vanilloid 1 (TRPV1) channels. We show that in excised patches PtdIns(4,5)P2 and other phosphoinositides activate and the PIP2 scavenger poly-Lys inhibits TRPV1. TRPV1 currents undergo desensitization on exposure to high concentrations of capsaicin in the presence of extracellular Ca2+. We show that in the presence of extracellular Ca2+, capsaicin activates phospholipase C (PLC) in TRPV1-expressing cells, inducing depletion of both PtdIns(4,5)P2 and its precursor PtdIns(4)P (PIP). The PLC inhibitor U73122 and dialysis of PtdIns(4,5)P2 or PtdIns(4)P through the patch pipette inhibited desensitization of TRPV1, indicating that Ca2+-induced activation of PLC contributes to desensitization of TRPV1 by depletion of PtdIns(4,5)P2 and PtdIns(4)P. Selective conversion of PtdIns(4,5)P2 to PtdIns(4)P by a rapamycin-inducible PIP2 5-phosphatase did not inhibit TRPV1 at high capsaicin concentrations, suggesting a significant role for PtdIns(4)P in maintaining channel activity. Currents induced by low concentrations of capsaicin and moderate heat, however, were potentiated by conversion of PtdIns(4,5)P2 to PtdIns(4)P. Increasing PtdIns(4,5)P2 levels by coexpressing phosphatidylinositol-4-phosphate 5-kinase inhibited TRPV1 at low but not at saturating capsaicin concentrations. These data show that at low capsaicin concentrations and other moderate stimuli, PtdIns(4,5)P2 partially inhibits TRPV1 in a cellular context, but this effect is likely to be indirect, because it is not detectable in excised patches. We conclude that phosphoinositides have both inhibitory and activating effects on TRPV1, resulting in complex and distinct regulation at various stimulation levels.
Collapse
Affiliation(s)
- Viktor Lukacs
- Department of Pharmacology and Physiology, University of Medicine and Dentistry of New Jersey–New Jersey Medical School, Newark, New Jersey 07103, and
| | - Baskaran Thyagarajan
- Department of Pharmacology and Physiology, University of Medicine and Dentistry of New Jersey–New Jersey Medical School, Newark, New Jersey 07103, and
| | - Peter Varnai
- Endocrinology and Reproduction Research Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892
| | - Andras Balla
- Endocrinology and Reproduction Research Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892
| | - Tamas Balla
- Endocrinology and Reproduction Research Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892
| | - Tibor Rohacs
- Department of Pharmacology and Physiology, University of Medicine and Dentistry of New Jersey–New Jersey Medical School, Newark, New Jersey 07103, and
| |
Collapse
|
20
|
Balla A, Balla T. Phosphatidylinositol 4-kinases: old enzymes with emerging functions. Trends Cell Biol 2006; 16:351-61. [PMID: 16793271 DOI: 10.1016/j.tcb.2006.05.003] [Citation(s) in RCA: 285] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2006] [Revised: 04/21/2006] [Accepted: 05/22/2006] [Indexed: 11/23/2022]
Abstract
Phosphoinositides account for only a tiny fraction of cellular phospholipids but are extremely important in the regulation of the recruitment and activity of many signaling proteins in cellular membranes. Phosphatidylinositol (PtdIns) 4-kinases generate PtdIns 4-phosphate, the precursor of important regulatory phosphoinositides but also an emerging regulatory molecule in its own right. The four mammalian PtdIns 4-kinases regulate a diverse array of signaling events, as well as vesicular trafficking and lipid transport, but the mechanisms by which their lipid product PtdIns 4-phosphate controls these processes is only beginning to unfold.
Collapse
Affiliation(s)
- Andras Balla
- Endocrinology and Reproduction Research Branch, NICHD, National Institutes of Health, Bethesda, MD 20892, USA
| | | |
Collapse
|
21
|
Knight ZA, Gonzalez B, Feldman ME, Zunder ER, Goldenberg DD, Williams O, Loewith R, Stokoe D, Balla A, Toth B, Balla T, Weiss WA, Williams RL, Shokat KM. A pharmacological map of the PI3-K family defines a role for p110alpha in insulin signaling. Cell 2006; 125:733-47. [PMID: 16647110 PMCID: PMC2946820 DOI: 10.1016/j.cell.2006.03.035] [Citation(s) in RCA: 943] [Impact Index Per Article: 52.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2005] [Revised: 02/06/2006] [Accepted: 03/15/2006] [Indexed: 01/17/2023]
Abstract
Phosphoinositide 3-kinases (PI3-Ks) are an important emerging class of drug targets, but the unique roles of PI3-K isoforms remain poorly defined. We describe here an approach to pharmacologically interrogate the PI3-K family. A chemically diverse panel of PI3-K inhibitors was synthesized, and their target selectivity was biochemically enumerated, revealing cryptic homologies across targets and chemotypes. Crystal structures of three inhibitors bound to p110gamma identify a conformationally mobile region that is uniquely exploited by selective compounds. This chemical array was then used to define the PI3-K isoforms required for insulin signaling. We find that p110alpha is the primary insulin-responsive PI3-K in cultured cells, whereas p110beta is dispensable but sets a phenotypic threshold for p110alpha activity. Compounds targeting p110alpha block the acute effects of insulin treatment in vivo, whereas a p110beta inhibitor has no effect. These results illustrate systematic target validation using a matrix of inhibitors that span a protein family.
Collapse
Affiliation(s)
- Zachary A. Knight
- Department of Cellular and Molecular Pharmacology, Howard Hughes Medical Institute University of California, San Francisco, San Francisco, CA 94143, USA
| | - Beatriz Gonzalez
- MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, United Kingdom
| | - Morri E. Feldman
- Department of Cellular and Molecular Pharmacology, Howard Hughes Medical Institute University of California, San Francisco, San Francisco, CA 94143, USA
| | - Eli R. Zunder
- Department of Cellular and Molecular Pharmacology, Howard Hughes Medical Institute University of California, San Francisco, San Francisco, CA 94143, USA
| | - David D. Goldenberg
- Departments of Neurology and Pediatrics, Neurological Surgery and Brain Tumor Research Center University of California, San Francisco, San Francisco, CA 94143, USA
| | - Olusegun Williams
- Department of Cellular and Molecular Pharmacology, Howard Hughes Medical Institute University of California, San Francisco, San Francisco, CA 94143, USA
| | - Robbie Loewith
- University of Geneva, Department of Molecular Biology, CH-1211 Geneva 4, Switzerland
| | - David Stokoe
- Comprehensive Cancer Center University of California, San Francisco, San Francisco, CA 94143, USA
| | - Andras Balla
- Endocrinology and Reproduction Research Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | - Balazs Toth
- Endocrinology and Reproduction Research Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | - Tamas Balla
- Endocrinology and Reproduction Research Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | - William A. Weiss
- Departments of Neurology and Pediatrics, Neurological Surgery and Brain Tumor Research Center University of California, San Francisco, San Francisco, CA 94143, USA
- Comprehensive Cancer Center University of California, San Francisco, San Francisco, CA 94143, USA
| | - Roger L. Williams
- MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, United Kingdom
| | - Kevan M. Shokat
- Department of Cellular and Molecular Pharmacology, Howard Hughes Medical Institute University of California, San Francisco, San Francisco, CA 94143, USA
- Contact:
| |
Collapse
|
22
|
Javitt DC, Duncan L, Balla A, Sershen H. Inhibition of system A-mediated glycine transport in cortical synaptosomes by therapeutic concentrations of clozapine: implications for mechanisms of action. Mol Psychiatry 2005; 10:275-87. [PMID: 15278098 DOI: 10.1038/sj.mp.4001552] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Clozapine is an atypical antipsychotic with particular efficacy in schizophrenia, possibly related to potentiation of brain N-methyl-D-aspartate receptor (NMDAR) -mediated neurotransmission. NMDARs are regulated in vivo by glycine, which is regulated in turn by glycine transporters. The present study investigates transport processes regulating glycine uptake into rat brain synaptosomes, along with effects of clozapine on synaptosomal glycine transport. Amino-acid uptake of amino acids was assessed in rat brain P2 synaptosomal preparations using a radiotransport assay. Synaptosomal glycine transport was inhibited by a series of amino acids and by the selective System A antagonist MeAIB (2-methyl-aminoisobutyric acid). Clozapine inhibited transport of both glycine and MeAIB, but not other amino acids, at concentrations associated with preferential clinical response (0.5-1 microg/ml). By contrast, other antipsychotics studied were ineffective. The novel glycine transport inhibitor N[3-(4'-fluorophenyl)-3-(4'-phenylphenoxy)propyl]sarcosine (NFPS) produced biphasic inhibition of [(3)H]glycine transport, with IC(50) values of approximately 25 nM and 25 microM, respectively. NFPS inhibition of [(3)H]MeAIB was monophasic with a single IC(50) value of 31 microM. Clozapine significantly inhibited [(3)H]glycine binding even in the presence of 100 nM NFPS. In conclusion, this study suggests first that System A transporters, or a subset thereof, may play a critical role in regulation of synaptic glycine levels and by extension of NMDA receptor regulation, and second that System A antagonism may contribute to the differential clinical efficacy of clozapine compared with other typical or atypical antipsychotics.
Collapse
Affiliation(s)
- D C Javitt
- Program in Cognitive Neuroscience and Schizophrenia, Nathan Kline Institute for Psychiatric Research/New York University School of Medicine, 140 Old Orangeburg Road, Orangeburg, NY 10962, USA.
| | | | | | | |
Collapse
|
23
|
Balla A, Tuymetova G, Tsiomenko A, Várnai P, Balla T. A plasma membrane pool of phosphatidylinositol 4-phosphate is generated by phosphatidylinositol 4-kinase type-III alpha: studies with the PH domains of the oxysterol binding protein and FAPP1. Mol Biol Cell 2005; 16:1282-95. [PMID: 15635101 PMCID: PMC551492 DOI: 10.1091/mbc.e04-07-0578] [Citation(s) in RCA: 202] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The PH domains of OSBP and FAPP1 fused to GFP were used to monitor PI(4)P distribution in COS-7 cells during manipulations of PI 4-kinase (PI4K) activities. Both domains were associated with the Golgi and small cytoplasmic vesicles, and a small fraction of OSBP-PH was found at the plasma membrane (PM). Inhibition of type-III PI4Ks with 10 microM wortmannin (Wm) significantly reduced but did not abolish Golgi localization of either PH domains. Downregulation of PI4KIIalpha or PI4KIIIbeta by siRNA reduced the localization of the PH domains to the Golgi and in the former case any remaining Golgi localization was eliminated by Wm treatment. PLC activation by Ca2+ ionophores dissociated the domains from all membranes, but after Ca2+ chelation, they rapidly reassociated with the Golgi, the intracellular vesicles and with the PM. PM association of the domains was significantly higher after the Ca2+ transient and was abolished by Wm pretreatment. PM relocalization was not affected by down-regulation of PI4KIIIbeta or -IIalpha, but was inhibited by down-regulation of PI4KIIIalpha, or by 10 microM PAO, which also inhibits PI4KIIIalpha. Our data suggest that these PH domains detect PI(4)P formation in extra-Golgi compartments under dynamic conditions and that various PI4Ks regulate PI(4)P synthesis in distinct cellular compartments.
Collapse
Affiliation(s)
- Andras Balla
- Endocrinology and Reproduction Research Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | | | | | | | | |
Collapse
|
24
|
Lee SB, Várnai P, Balla A, Jalink K, Rhee SG, Balla T. The Pleckstrin Homology Domain of Phosphoinositide-specific Phospholipase Cδ4 Is Not a Critical Determinant of the Membrane Localization of the Enzyme. J Biol Chem 2004; 279:24362-71. [PMID: 15037625 DOI: 10.1074/jbc.m312772200] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The inositol lipid and phosphate binding properties and the cellular localization of phospholipase Cdelta(4) (PLCdelta(4)) and its isolated pleckstrin homology (PH) domain were analyzed in comparison with the similar features of the PLCdelta(1) protein. The isolated PH domains of both proteins showed plasma membrane localization when expressed in the form of a green fluorescent protein fusion construct in various cells, although a significantly lower proportion of the PLCdelta(4) PH domain was membrane-bound than in the case of PLCdelta(1)PH-GFP. Both PH domains selectively recognized phosphatidylinositol 4,5-bisphosphate (PI(4,5)P(2)), but a lower binding of PLCdelta(4)PH to lipid vesicles containing PI(4,5)P(2) was observed. Also, higher concentrations of inositol 1,4,5-trisphosphate (Ins(1,4,5)P(3)) were required to displace the PLCdelta(4)PH from the lipid vesicles, and a lower Ins(1,4,5)P(3) affinity of PLCdelta(4)PH was found in direct Ins(1,4,5)P(3) binding assays. In sharp contrast to the localization of its PH domain, the full-length PLCdelta(4) protein localized primarily to intracellular membranes mostly to the endoplasmic reticulum (ER). This ER localization was in striking contrast to the well documented PH domain-dependent plasma membrane localization of PLCdelta(1). A truncated PLCdelta(4) protein lacking the entire PH domain still showed the same ER localization as the full-length protein, indicating that the PH domain is not a critical determinant of the localization of this protein. Most important, the full-length PLCdelta(4) enzyme still showed binding to PI(4,5)P(2)-containing micelles, but Ins(1,4,5)P(3) was significantly less potent in displacing the enzyme from the lipid than with the PLCdelta(1) protein. These data suggest that although structurally related, PLCdelta(1) and PLCdelta(4) are probably differentially regulated in distinct cellular compartments by PI(4,5)P(2) and that the PH domain of PLCdelta(4) does not act as a localization signal.
Collapse
Affiliation(s)
- Sang Bong Lee
- Laboratory of Cell Signaling, NHLI, National Institutes of Health, Bethesda, Maryland 20892, USA
| | | | | | | | | | | |
Collapse
|
25
|
Balla A, Tuymetova G, Barshishat M, Geiszt M, Balla T. Characterization of type II phosphatidylinositol 4-kinase isoforms reveals association of the enzymes with endosomal vesicular compartments. J Biol Chem 2002; 277:20041-50. [PMID: 11923287 DOI: 10.1074/jbc.m111807200] [Citation(s) in RCA: 160] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Phosphorylation of phosphatidylinositol (PI) to PI 4-phosphate is one of the key reactions in the production of phosphoinositides, lipid regulators of several cellular functions. This reaction is catalyzed by multiple enzymes that belong either to the type II or the type III family of PI 4-kinases. Type III enzymes are structurally similar to PI 3-kinases and are sensitive to PI 3-kinase inhibitors. In contrast, the recent cloning of the first type II PI 4-kinase enzyme defined a novel enzyme family. Here we characterize a new member of this family, the type IIbeta enzyme that has been identified in the NCBI data base based on its homology to the first-cloned type IIalpha enzyme. The type IIbeta enzyme has a primary transcript size of approximately 3.8 kb and shows wide tissue distribution. It contains an open reading frame of 1.4 kb, encoding a protein of approximately 54 kDa. Sequence comparison reveals a high degree of similarity to the type IIalpha enzyme within the C-terminal catalytic domain but significantly lower homology within the N-terminal region. Expression of both enzyme yields increased PI 4-kinase activity that is associated with the microsomal membrane fractions and is significantly lower for the type IIbeta than the type IIalpha form. Both enzymes use PI as their primary substrate and have no detectable activity on PI monophosphates. Epitope-tagged as well as green fluorescent protein-tagged forms of both enzymes localize primarily to intracellular membranes and show prominent co-localization with early endosomes and recycling endosomes but not with the Golgi. These compartments participate in the processing of both the transferrin receptor and the G protein-coupled AT(1A) angiotensin receptor. Our data indicate the existence of multiple forms of type II PI 4-kinase in mammalian cells and suggest that their functions are related to the endocytic pathway.
Collapse
Affiliation(s)
- Andras Balla
- Endocrinology and Reproduction Research Branch, NICHD, and Laboratory of Host Defenses, NIAID, National Institutes of Health, Bethesda, Maryland 20892, USA
| | | | | | | | | |
Collapse
|
26
|
Zhao X, Várnai P, Tuymetova G, Balla A, Tóth ZE, Oker-Blom C, Roder J, Jeromin A, Balla T. Interaction of neuronal calcium sensor-1 (NCS-1) with phosphatidylinositol 4-kinase beta stimulates lipid kinase activity and affects membrane trafficking in COS-7 cells. J Biol Chem 2001; 276:40183-9. [PMID: 11526106 DOI: 10.1074/jbc.m104048200] [Citation(s) in RCA: 126] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Phosphatidylinositol 4-kinases (PI4K) catalyze the first step in the synthesis of phosphatidylinositol 4,5-bisphosphate, an important lipid regulator of several cellular functions. Here we show that the Ca(2+)-binding protein, neuronal calcium sensor-1 (NCS-1), can physically associate with the type III PI4Kbeta with functional consequences affecting the kinase. Recombinant PI4Kbeta, but not its glutathione S-transferase-fused form, showed enhanced PI kinase activity when incubated with recombinant NCS-1, but only if the latter was myristoylated. Similarly, in vitro translated NCS-1, but not its myristoylation-defective mutant, was found associated with recombinant- or in vitro translated PI4Kbeta in PI4Kbeta-immunoprecipitates. When expressed in COS-7 cells, PI4Kbeta and NCS-1 formed a complex that could be immunoprecipitated with antibodies against either proteins, and PI 4-kinase activity was present in anti-NCS-1 immunoprecipitates. Expressed NCS-1-YFP showed co-localization with endogenous PI4Kbeta primarily in the Golgi, but it was also present in the walls of numerous large perinuclear vesicles. Co-expression of a catalytically inactive PI4Kbeta inhibited the development of this vesicular phenotype. Transfection of PI4Kbeta and NCS-1 had no effect on basal PIP synthesis in permeabilized COS-7 cells, but it increased the wortmannin-sensitive [(32)P]phosphate incorporation into phosphatidylinositol 4-phosphate during Ca(2+)-induced phospholipase C activation. These results together indicate that NCS-1 is able to interact with PI4Kbeta also in mammalian cells and may play a role in the regulation of this enzyme in specific cellular compartments affecting vesicular trafficking.
Collapse
Affiliation(s)
- X Zhao
- Endocrinology and Reproduction Research Branch, NICHD, National Institutes of Health, 49 Convent Drive, Bethesda, MD 20892, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Balla A, Hashim A, Burch S, Javitt DC, Lajtha A, Sershen H. Phencyclidine-induced dysregulation of dopamine response to amphetamine in prefrontal cortex and striatum. Neurochem Res 2001; 26:1001-6. [PMID: 11699927 DOI: 10.1023/a:1012396820510] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Phencyclidine (PCP) administration in rodents has been used to model aspects of schizophrenia. One aspect of such treatment has been the enhancement of amphetamine-induced increase of dopamine in the prefrontal cortex and striatum. To further characterize this mechanism rats were treated for 2 weeks with continuous PCP (15 mg/kg per day via Alzet minipump). Rats were implanted with a microdialysis probe into the prefrontal cortex (PFC) or striatum. Amphetamine was administered locally via the dialysis probe during one collection period and changes in extracellular dopamine were monitored. The effect of local administration of the dopamine uptake blocker nomifensine was also measured. Amphetamine (10 microM) and nomifensine (10 microM) increased the level of dopamine in both the PFC and striatum. PCP administration did not alter the response to amphetamine or nomifensine in the PFC, but reduced this response about 2-fold in striatum. To examine effects of continuous PCP administration on dopamine autoreceptor function, release of [3H]dopamine in response to electrical stimulation and in the presence of a dopamine agonist or antagonist was tested in striatal and prefrontal cortical tissue. Autoreceptor responses were similar in control and PCP-treated tissues. We conclude that the brain region-specific enhancement of dopamine release by peripheral amphetamine administration in rats after PCP is not likely mediated by alterations in the dopamine autoreceptors or changes in the dopamine transporter. The selective local responses of amphetamine indicates heterogeneous regional effects of continuous PCP on NMDA receptor function; effects that influence both regional excitatory responses and the overall dynamics of tonic excitatory/inhibitory inputs to the PFC and striatum.
Collapse
Affiliation(s)
- A Balla
- Nathan S. Kline Institute, Orangeburg, NY 10962, USA
| | | | | | | | | | | |
Collapse
|
28
|
Abstract
Functional dopaminergic hyperactivity is a key feature of schizophrenia. Recent in vivo imaging studies have demonstrated greater striatal dopamine release in response to amphetamine challenge in schizophrenia subjects than in normal controls. N-methyl-D-aspartate (NMDA) receptors are known to play a prominent role in regulation of striatal dopamine release. In humans, NMDA antagonists induce a psychotic state that closely resembles schizophrenia. The present study investigates the degree to which chronic continuous administration of the NMDA antagonist phencyclidine (PCP) induces schizophrenia-like hyperreactivity of striatal dopamine release to amphetamine in rodents. Rats were treated with 10 or 15 mg/kg/d PCP for two weeks by osmotic minipump, and striatal dopamine release to amphetamine challenge (1 mg/kg) was monitored by microdialysis. PCP-treated rats showed significant enhancement in amphetamine-induced dopamine release, along with significantly enhanced locomotor activity. These findings support the concept that NMDA receptor dysfunction may contribute to dopaminergic dysfunction in schizophrenia.
Collapse
Affiliation(s)
- A Balla
- Program in Cognitive Neuroscience and Schizophrenia, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA
| | | | | | | | | |
Collapse
|
29
|
Polukhin E, Balla A, Chary K, Mezhir J. Microangiopathic hemolytic anemia as the first manifestation of lung adenocarcinoma. South Med J 2001; 94:550-1. [PMID: 11372816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
Anemia is common in patients with disseminated carcinoma and is usually due to bleeding, infection, or marrow suppression from chemotherapy or metastatic infiltration. However, microangiopathic hemolytic anemia is rarely seen in such patients. We report a case in which microangiopathic hemolytic anemia was the initial finding in lung adenocarcinoma.
Collapse
Affiliation(s)
- E Polukhin
- Department of Physical Medicine and Rehabilitation, State University of New York at Buffalo, USA
| | | | | | | |
Collapse
|
30
|
Abstract
Cell death is common to many pathological conditions. In the past two decades, research into the mechanism of cell death has characterized the cardinal features of apoptosis and necrosis, the two distinct forms of cell death. Studies using in vivo disease models have provided evidence that apoptosis is induced by an array of pathological stimuli. Thus, molecular components of the machinery of apoptosis are potential pharmacological targets. The mechanism of apoptosis can be dissected into: (i) the initiation and signaling phase, (ii) the signal amplification phase, and (iii) the execution phase. Reflecting on the diversity of apoptotic stimuli, the initiation and signaling phase utilizes a variety of molecules: free radicals, ions, plasma membrane receptors, members of the signaling kinase cascades, transcription factors, and signaling caspases. In most of the apoptotic scenarios, impairment of mitochondrial function is an early event. Dysfunctioning mitochondria release more free radicals and hydrolytic enzymes (proteases and nucleases), amplifying the primary death signal. In the final phase of apoptosis, executioner caspases are activated. Substrates of the executioner caspases include nucleases, members of the cellular repair apparatus, and cytoskeletal proteins. Partial proteolysis of these substrates leads to distinctive morphological and biochemical changes, the hallmarks of apoptosis. The first steps toward pharmacological utilization of specific modifiers of apoptosis have been promising. However, since the potential molecular targets of cytoprotective therapy play important roles in the maintenance of cellular homeostasis, specificity (diseased versus healthy tissue) of pharmacological modulation is the key to success.
Collapse
Affiliation(s)
- A Balla
- Department of Medical Chemistry, Debrecen University, School of Medicine, Debrecen, Hungary
| | | | | | | | | |
Collapse
|
31
|
Vereb G, Balla A, Gergely P, Wymann MP, Gülkan H, Suer S, Heilmeyer LM. The ATP-binding site of brain phosphatidylinositol 4-kinase PI4K230 as revealed by 5'-p-fluorosulfonylbenzoyladenosine. Int J Biochem Cell Biol 2001; 33:249-59. [PMID: 11311856 DOI: 10.1016/s1357-2725(01)00006-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The ATP-binding site of purified bovine brain phosphatidylinositol 4-kinase 230 (PI4K230) was studied by its reaction with 5'-p-fluorosulfonylbenzoyladenosine (FSBA), an ATP-like alkylating reagent. Four hundred to eight hundred micromolar FSBA inactivated PI4K230 specifically with apparently first-order kinetics and resulted in 50% loss of enzyme activity in 36--130 min. The specificity of the reaction with FSBA was demonstrated by the lack of inactivation with 5'-p-fluorosulfonylbenzoyl chloride and by protection with ATP and ATP analogues against inactivation. Most ATP analogues competed with FSBA inactivation in order of their increasing hydrophobicity, parallel to their inhibitory potency in activity measurements. The specific binding of FSBA to PI4K230 was demonstrated also by Western-blot experiments. These results suggest that FSBA-reactive group(s) involved in the enzyme activity are located near to the ATP-binding site in a hydrophobic region of native PI4K230. Experiments with site-directed mutagenesis indicate that the conserved Lys-1792 plays essential role in the enzyme activity and serves as one target of affinity labelling by FSBA. Prevention of both Lys-1792-directed and Lys-1792-independent binding of FSBA by Cibacron Blue 3GA suggest that these sites are located spatially close to each other.
Collapse
Affiliation(s)
- G Vereb
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Bem tér 18/B, H-4026 Debrecen, Hungary.
| | | | | | | | | | | | | |
Collapse
|
32
|
Affiliation(s)
- V Bozikas
- A Psychiatric Clinic of Aristotle University of Thessaloniki, Psychiatric Hospital of Thessaloniki, 36 Konstantinoupoleos St., Thessaloniki 56429, Greece
| | | | | | | |
Collapse
|
33
|
Pelyvás IF, Tóth ZG, Vereb G, Balla A, Kovács E, Gorzsás A, Sztaricskai F, Gergely P. Synthesis of new cyclitol compounds that influence the activity of phosphatidylinositol 4-kinase isoform, PI4K230. J Med Chem 2001; 44:627-32. [PMID: 11170653 DOI: 10.1021/jm001081c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis, chemical derivatization, and investigation of the inhibitory properties of novel cyclitol derivatives on the phosphatidylinositol 4-kinase enzymes PI4K55 and PI4K230 involved in the phosphatidylinositol cycle are reported. Some of the prepared cyclitol derivatives (i.e. 9, 11, 12, and 14) proved to be very powerful and specific irreversible inhibitors of PI4K230 at or below a concentration of 1 mM.
Collapse
Affiliation(s)
- I F Pelyvás
- Research Group of Antibiotics of the Hungarian Academy of Sciences, University of Debrecen, P.O. Box 70, Debrecen H-4010, Hungary.
| | | | | | | | | | | | | | | |
Collapse
|
34
|
Balla A, Vereb G, Gülkan H, Gehrmann T, Gergely P, Heilmeyer LM, Antal M. Immunohistochemical localisation of two phosphatidylinositol 4-kinase isoforms, PI4K230 and PI4K92, in the central nervous system of rats. Exp Brain Res 2000; 134:279-88. [PMID: 11045352 DOI: 10.1007/s002210000469] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The distribution and cellular localisation of the phosphatidylinositol 4-kinase isoforms, PI4K230 and PI4K92, that are believed to play important roles in the intracellular signalling mechanisms were studied in the rat brain (cortex, cerebellum, hippocampus and spinal cord) using immunocytochemistry with light and electron microscopy. PI4K230 was detected with a specific antibody purified by affinity chromatography from the egg yolk of chicken immunised with a 33-kDa fragment of bovine PI4K230, comprising amino acids 873-1175 of the native protein. PI4K92 was immunostained with a commercially available antibody raised in rabbit against amino acid residues 410-537 of human PI4K92. At the light microscopic level, the immunostaining of PI4K230 and PI4K92 showed a very similar distribution throughout the neurons and appeared as dense punctate labelling in the cytoplasm of perikarya and stem dendrites of various neurons. In addition to neurons, a strongly stained cell population was observed in the molecular layer of the cerebellar cortex that resembled Bergmann glia cells. Electron microscopy of neurons in the ventral horn of the spinal cord showed dense granular immunoprecipitates for both PI4K230 and PI4K92, mostly associated with the outer membrane of mitochondria and membranes of the rough endoplasmic reticulum. In addition, immunostaining of PI4K92 was also frequently found on the outer surface of cisterns and vesicles of Golgi complexes, whereas PI4K230 immunoreactivity was colocalised with some multivesicular bodies. Neither nuclear localisation nor a regular attachment to the cell membrane of these enzymes were observed. Our findings indicate that PI4K230 and PI4K92 are not involved directly in the ligand-stimulated turnover of phosphoinositides at the plasma membrane of neurons. However, they may provide regulatory phosphoinositides for intracellular vesicular traffic being associated with various organelles.
Collapse
Affiliation(s)
- A Balla
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Hungary
| | | | | | | | | | | | | |
Collapse
|
35
|
Vadasz C, Saito M, Balla A, Kiraly I, Vadasz C, Gyetvai B, Mikics E, Pierson D, Brown D, Nelson JC. Mapping of quantitative trait loci for ethanol preference in quasi-congenic strains. Alcohol 2000; 20:161-71. [PMID: 10719795 DOI: 10.1016/s0741-8329(99)00068-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Ethanol preference, a component of alcoholism, has been known for four decades to differ greatly between C57BL/6 and BALB/c inbred mouse strains. For mapping quantitative trait loci (QTLs) that affect ethanol preference, we used a set of B6.C Recombinant QTL Introgression (RQI) strains, which carry about 5% of the donor BALB/cJ (C) genome on a C57BL/6ByJ (B6) background. After characterizing males of the progenitor and RQI strains for variations in ethanol preference, we scanned their genome for polymorphisms at 244 dinucleotide-repeat marker loci known to differ between B6 and C. Because of the introgression of BALB/c-type QTLs onto the B6 background, some strains showed ethanol preference significantly lower or higher than that of the background strain, suggesting that genetic interaction between ethanol preference QTLs and the background can be operative. The genomic region showing the strongest influence on ethanol preference was on mouse chromosome 15, and corresponds to human chr.12q11-q13.
Collapse
Affiliation(s)
- C Vadasz
- The Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Gehrmann T, Gülkan H, Suer S, Herberg FW, Balla A, Vereb G, Mayr GW, Heilmeyer LM. Functional expression and characterisation of a new human phosphatidylinositol 4-kinase PI4K230. Biochim Biophys Acta 1999; 1437:341-56. [PMID: 10101268 DOI: 10.1016/s1388-1981(99)00029-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
By constructing DNA probes we have identified and cloned a human PtdIns 4-kinase, PI4K230, corresponding to a mRNA of 7.0 kb. The cDNA encodes a protein of 2044 amino acids. The C-terminal part of ca. 260 amino acids represents the catalytic domain which is highly conserved in all recently cloned PtdIns 4-kinases. N-terminal motifs indicate multiple heterologous protein interactions. Human PtdIns 4-kinase PI4K230 expressed in vitro exhibits a specific activity of 58 micromol mg-1min-1. The enzyme expressed in Sf9 cells is essentially not inhibited by adenosine, it shows a high Km for ATP of about 300 microM and it is half-maximally inactivated by approximately 200 nM wortmannin. These data classify this enzyme as type 3 PtdIns 4-kinase. Antibodies raised against the N-terminal part moderately activate and those raised against the C-terminal catalytic domain inhibit the enzymatic activity. The coexistence of two different type 3 PtdIns 4-kinases, PI4K92 and PI4K230, in several human tissues, including brain, suggests that these enzymes are involved in distinct basic cellular functions.
Collapse
Affiliation(s)
- T Gehrmann
- Ruhr-Universität Bochum, Institut für Physiologische Chemie, Abteilung für Biochemie Supramolekularer Systeme, D-44780, Bochum, Germany
| | | | | | | | | | | | | | | |
Collapse
|
37
|
Abstract
BACKGROUND Phencycline (PCP, "angel dust") and other noncompetitive antagonists of N-methyl-D-aspartate (NMDA)-type glutamatergic neurotransmission induce psychotic effects in humans that closely resemble positive, negative, and cognitive symptoms of schizophrenia. Behavioral effects of PCP in rodents are reversed by glycine (GLY) and other NMDA augmenting agents. In rodents, behavioral effects of PCP are mediated, in part, by secondary dysregulation of subcortical dopaminergic neurotransmission. This study evaluates effects of GLY and GLY transport antagonists on behavioral and neurochemical consequences of PCP administration in rodents. METHODS Two separate experiments were performed. In the first, effects of GLY on PCP-induced stimulation of dopaminergic neurotransmission in nucleus accumbens were evaluated using in vivo microdialysis in awake animals. In the second, effects of a series of GLY transport antagonists were evaluated for potency in inhibiting PCP-induced hyperactivity. RESULTS In microdialysis studies, GLY significantly inhibited PCP-induced stimulation of subcortical DA release in a dose-dependent fashion. In behavioral studies, the potency of a series of GLY transport antagonists for inhibiting PCP-induced hyperactivity in vivo correlated significantly with their potency in antagonizing GLY transport in vitro. CONCLUSIONS These findings suggest, first, that GLY reverses not only the behavioral, but also the neurochemical, effects of PCP in rodents. Second, the findings suggest that GLY transport antagonists may induce similar effects to GLY, and may therefore represent an appropriate site for targeted drug development.
Collapse
Affiliation(s)
- D C Javitt
- Program in Cognitive Neuroscience and Schizophrenia, Nathan Kline Institute for Psychiatry Research, Orangeburg, New York 10962, USA
| | | | | | | |
Collapse
|
38
|
Abstract
The pharmacological features of putative nicotinic acetylcholine receptor sites involved in the release of [3H]noradrenaline were assessed in rat hippocampus. The effect of nicotinic agonists to induce [3H]noradrenaline release was examined in superfused slices. The nicotinic agonists (-)-epibatidine, (+)-anatoxin-a, dimethylphenylpiperazinium, (-)-nicotine and (-)-lobeline released [3H]noradrenaline. The dose-response curves to nicotinic agonists were bell shaped, and indicated that their functional efficacies and potency vary across agonists. Maximal efficacy was seen with dimethyl-phenylpiperazinium and lobeline (Emax values two to three times higher than other agonists). The rank order of potency for the agonists to release [3H]noradrenaline was (-)-epibatidine > (+)- anatoxin-a > dimethylphenylpiperazinium > cytisine > nicotine > (-)-lobeline. The nicotinic acetylcholine receptor antagonists (n-bungarotoxin > mecamylamine > (+)-tubocurarine > hexamethonium > alpha-bungarotoxin = dihydro-beta-erythroidine) and tetrodotoxin antagonized the effect of dimethylphenylpiperazinium to release [3H]noradrenaline. The results, based on these pharmacological profiles, suggest the possible involvement of alpha 3 and beta 2 nicotinic acetylcholine receptor subunits in the control of [3H]noradrenaline release from hippocampal slices. The absence of effect of alpha-bungarotoxin and alpha-conotoxin-IMI excludes the possible involvement of nicotinic acetylcholine receptors containing the alpha 7 subunit. The release of [3H]noradrenaline by dimethylphenylpiperazinium was Ca2+ dependent. Nifedipine failed to prevent the dimethylphenylpiperazinium-induced release of [3H]noradrenaline, but Cd2+, omega-conotoxin and Ca(2+)-free conditions significantly reduced the dimethylphenylpiperazinium-induced release, suggesting that N-type voltage-sensitive Ca2+ channels are involved in the nicotinic acetylcholine receptor response. These voltage-sensitive Ca2+ channels are activated by the local depolarization produced by sodium influx through the nicotinic channels activated by dimethylphenylpiperazinium. Thus, the observed tetrodotoxin sensitivity of dimethylphenylpiperazinium-induced release of [3H]noradrenaline can be explained either by local depolarization and subsequent generation of action potentials at the preterminal area or that these nicotinic acetylcholine receptors are located on interneurons rather than directly on noradrenergic terminals.
Collapse
Affiliation(s)
- H Sershen
- Center of Neurochemistry, Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA
| | | | | | | |
Collapse
|
39
|
Abstract
The effect of the nicotinic receptor agonist dimethylphenylpiperazinium iodide (DMPP) on the resting release of [3H]noradrenaline from superfused hippocampal slices was studied in rat. Continuous administration of DMPP at a concentration range of 1-100 microM increased the [3H]noradrenaline release in a dose-dependent manner. The response to DMPP was characterized by an immediate steep increase (peak response) followed by a sudden decline to a lower level that was constant with time (tall response) and still was significantly higher than the spontaneous release. Further analysis revealed that the release of noradrenaline in response to DMPP consists of two components. While nicotinic receptor antagonists (mecamylamine 10 microM, pancuronium 10 microM, pipecuronium 10 microM), the nonselective Ca-antagonist Cd2+ (125 microM) and tetrodotoxin (TTX, 1 microM) completely abolished the peak response (phase I), they had no effect on the tall response (phase II). Ca(2+)-free medium containing 1 mM EGTA also blocked phase I but in contrast with other drugs enhanced phase II. The release during phase I is subject to presynaptic feedback modulation, since the alpha 2-adrenoceptor agonist xylazine (3 microM) inhibited the DMPP-evoked stimulation of [3H]noradrenaline release, that inhibition was antagonized by a selective alpha 2-adrenoceptor antagonist, (+/-)-[7,8-(methylenedioxy)-14-alpha-hydroxyalloberbane hydrochloride [(+/-)-CH-38083] (2 microM). (+/-)-CH-38083 (2 microM) alone significantly enhanced the DMPP-evoked increase of [3H]noradrenaline release. Phase II was not effected by alpha 2-adrenergic drugs. Whereas the noradrenaline uptake blockers despramine (DMI, 1-10 microM), nisoxetine (1-10 microM), and nomifensine (10 microM) inhibited both phases, nomifensine at a concentration of 1 microM selectively blocked only phase II. Our data indicate that DMPP has a dual effect on the hippocampal noradrenaline release: phase I is a transient, nicotinic receptor-mediated exocytotic release, and phase II is a maintained, carrier-mediated process.
Collapse
Affiliation(s)
- J P Kiss
- Department of Pharmacology, Hungarian Academy of Sciences, Budapest, Hungary
| | | | | | | | | |
Collapse
|
40
|
Vizi ES, Sershen H, Balla A, Mike A, Windisch K, Jurányi Z, Lajtha A. Neurochemical evidence of heterogeneity of presynaptic and somatodendritic nicotinic acetylcholine receptors. Ann N Y Acad Sci 1995; 757:84-99. [PMID: 7611712 DOI: 10.1111/j.1749-6632.1995.tb17466.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- E S Vizi
- Department of Pharmacology, Hungarian Academy of Sciences, Budapest
| | | | | | | | | | | | | |
Collapse
|
41
|
Mike A, Sershen H, Balla A, Lajtha A, Vizi E. Characterisation of Pre- and postsynaptic nicotinic acetylcholine receptors. Pharmacol Res 1995. [DOI: 10.1016/1043-6618(95)86469-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
42
|
Njayou M, Balla A, Kapo E. Comparison of four techniques of measles diagnosis: virus isolation, immunofluorescence, immunoperoxidase & ELISA. Indian J Med Res 1991; 93:340-4. [PMID: 1797639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
In an attempt to develop reliable, quick, simple and less expensive methods for diagnosing measles in rural areas, a study was undertaken in December, 1989, at the main health centre in Yaoundé, during the measles outbreak, which allowed access to 80 per cent of children living in Yaoundé. During the epidemic, 120 cases of measles were detected (clinically diagnosed) among the 1580 children examined. The control group comprised 120 children without symptoms of measles. Sick and control children were between 6 and 36 months old and comprised 54 males and 64 females. Measles was diagnosed by isolation of measles virus by cell culture, direct immunoperoxidase (DIP), direct immunofluorescence (DIF) and ELISA. Using cell culture, 8 measles virus (7%), 22 herpes simplex virus type 1 (HSV1), 6 varied enterovirus and 4 adenovirus were isolated in the sick group. In the control group, 8 HSV1, 5 enteroviruses and 4 adenoviruses were isolated. By DIP and DIF, 36 positive cases were detected (30%) and 84 negative cases in the sick group. By ELISA IgM, we found 72 positive cases which confirm clinical diagnosis in 60 per cent and 48 negative cases in the sick group. None of the three methods (DIP, DIF, ELISA) yielded positive cases in the control group. Evidence of the high prevalence of HSV1 during the measles outbreak leads to the question whether there is a primo-infection by the herpes simplex virus or a reactivation by the measles virus.
Collapse
Affiliation(s)
- M Njayou
- Laboratoire d'Immunologie et de Virologie, Université de Yaoundé, Faculté des Sciences, Cameroun
| | | | | |
Collapse
|
43
|
Njayou M, Balla A. Comparative study of peroxidase-labelled IgG and anti-IgG for the detection of measles virus antigens. J Virol Methods 1990; 29:91-5. [PMID: 2120280 DOI: 10.1016/0166-0934(90)90011-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The immunoperoxidase and immunoblotting techniques were used to detect measles virus antigens in nasopharyngeal samples taken from children visiting the Yaounde Health Centre (Cameroon). In order to make these diagnostic tests simpler, faster and less costly, peroxidase-labelled anti-measles IgG were prepared and compared with commercially available peroxidase-labelled mouse anti-IgG. Measles antigens were detected by immunoperoxidase and immunoblotting with the same sensitivity, no matter which type of conjugate was used. Moreover, the anti-measles IgG permitted the reduction of the duration of the test by half.
Collapse
Affiliation(s)
- M Njayou
- Laboratoire d'Immunologie et de Microbiologie, Faculté des Sciences, Yaoundé, Cameroun
| | | |
Collapse
|
44
|
Balla A, Tamás M, Mester Z, Jaklovszky A, Lörincz M, Nagy B, Ambrus J, Kertész B, Csizmás I, András P. [A statistical epidemiologic study of arterial pressure in schoolchildren in Harghita County to establish normal values]. Rev Pediatr Obstet Ginecol Pediatr 1989; 38:45-52. [PMID: 2505360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The epidemiological study was organized in schools in urban and rural areas. The study is readily reproducible and can be carried out longitudinally in the course of several years. Blood pressure was determined in children ranging in age from 7 to 14 years, and included 1838 children from urban areas--954 boys and 884 girls, and 1622 from rural areas--838 boys and 784 girls, per total 3460 children. Recording was done in the classroom in a quiet, friendly atmosphere, eliminating all psychical factors that might influence pressure, and was never taken before or after physical education. The pressure gage was applied on the right arm the cuff being adjusted to a child's arm. Pressure was determined thrice by two doctors independently, according to the Korotkov method, phase IV representing diastolic pressure. The data were processed statistically calculating the mean and standard deviation per determinations, per age, and finally calculating the proportions (individual values in the range of initial variations that correspond to percentages of 5, 25, 50, 75, 90, 95) of the total population analyzed. The tables give the results of systolic and diastolic pressure values in children in urban and in rural areas, as well as percentile curves of the systolic and diastolic pressure per sex. On the basis of the results children were considered to be candidates to high blood pressure whose systolic and/or diastolic tension in terms of age and sex was situated at percentage 95 or higher.
Collapse
|
45
|
Abstract
Bronchoalveolar fluid cytology from six progressive pulmonary paracoccidioidomycotic patients showed an alveolitis of neutrophilic pattern which was independent of the of the duration of the chronic fungal disease. The percentage of neutrophils in paracoccidioidomycotic alveolitis was higher than in other neutrophilic alveolitis conditions.
Collapse
|
46
|
Balla A, Brassay IP, Bencsik L, Jaklovszky A, Balla M. [The role of magnesium deficiency in convulsive syndromes in children]. Rev Pediatr Obstet Ginecol Pediatr 1982; 31:343-7. [PMID: 6820561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
47
|
Balla A, Jaklovszky A, Brassay IP, Szilasi A. [Gastroduodenal ulcer in children (clinical study)]. Rev Pediatr Obstet Ginecol Pediatr 1981; 30:263-70. [PMID: 6800016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
48
|
Balla A, Brassay IP, Serfözö P, Balla M. [Role of hypomagnesemia in rickets in infants (clinical and therapeutic study)]. Rev Pediatr Obstet Ginecol Pediatr 1981; 30:149-158. [PMID: 6791263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
|
49
|
Balla A, Jaklovszky A, Hecser L. [The role of magnesium in the origin of reno-urinary calcium oxalate lithiasis]. Rev Pediatr Obstet Ginecol Pediatr 1980; 29:355-62. [PMID: 6794131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
50
|
Balla A, Brassay IP, Balla M, Zágoni E, Jaklovszky A. [Treatment of deficiency anemias with magnesium, iron and a combination of these, in children of the Odorhein-Secuiese city day-nurseries (clinical and therapeutic study)]. Rev Pediatr Obstet Ginecol Pediatr 1980; 29:277-284. [PMID: 6781037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
|