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Balakrishnan A, Jah A, Lesurtel M, Andersson B, Gibbs P, Harper SJF, Huguet EL, Kosmoliaptsis V, Liau SS, Praseedom RK, Ramia JM, Branes A, Lendoire J, Maithel S, Serrablo A, Achalandabaso M, Adham M, Ahmet A, Al-Sarireh B, Albiol Quer M, Alconchel F, Alejandro R, Alsammani M, Alseidi A, Anand A, Anselmo A, Antonakis P, Arabadzhieva E, de Aretxabala X, Aroori S, Ashley S, Ausania F, Banerjee A, Barabino M, Bartlett A, Bartsch F, Belli A, Beristain-Hernandez J, Berrevoet F, Bhatti A, Bhojwani R, Bjornsson B, Blaz T, Byrne M, Calvo M, Castellanos J, Castro M, Cavallucci D, Chang D, Christodoulis G, Ciacio O, Clavien P, Coker A, Conde-Rodriguez M, D'Amico F, D'Hondt M, Daams F, Dasari B, De Beillis M, de Meijer V, Dede K, Deiro G, Delgado F, Desai G, Di Gioia A, Di Martino M, Dixon M, Dorovinis P, Dumitrascu T, Ebata T, Eilard M, Erdmann J, Erkan M, Famularo S, Felli E, Fergadi M, Fernandez G, Fox A, Galodha S, Galun D, Ganandha S, Garcia R, Gemenetzis G, Giannone F, Gil L, Giorgakis E, Giovinazzo F, Giuffrida M, Giuliani T, Giuliante F, Gkekas I, Goel M, Goh B, Gomes A, Gruenberger T, Guevara O, Gulla A, Gupta A, Gupta R, Hakeem A, Hamid H, Heinrich S, Helton S, Heumann A, Higuchi R, Hughes D, Inarejos B, Ivanecz A, Iwao Y, Iype S, Jaen I, Jie M, Jones R, Kacirek K, Kalayarasan R, Kaldarov A, Kaman L, Kanhere H, Kapoor V, Karanicolas P, Karayiannakis A, Kausar A, Khan Z, Kim DS, Klose J, Knowles B, Koh P, Kolodziejczyk P, Komorowski A, Koong J, Kozyrin I, Krishna A, Kron P, Kumar N, van Laarhoven S, Lakhey P, Lanari J, Laurenzi A, Leow V, Limbu Y, Liu YB, Lob S, Lolis E, Lopez-Lopez V, Lozano R, Lundgren L, Machairas M, Magouliotis D, Mahamid A, Malde D, Malek A, Malik H, Malleo G, Marino M, Mayo S, Mazzola M, Memeo R, Menon K, Menzulin R, Mohan R, Morgul H, Moris D, Mulita F, Muttillo E, Nahm C, Nandasena M, Nashidengo P, Nickkholgh A, Nikov A, Noel C, O'Reilly D, O'Rourke T, Ohtsuka M, Omoshoro-Jones J, Pandanaboyana S, Pararas N, Patel R, Patkar S, Peng J, Perfecto A, Perinel J, Perivoliotis K, Perra T, Phan M, Piccolo G, Porcu A, Primavesi F, Primrose J, Pueyo-Periz E, Radenkovic D, Rammohan A, Rowcroft A, Sakata J, Saladino E, Schena C, Scholer A, Schwarz C, Serrano P, Silva M, Soreide K, Sparrelid E, Stattner S, Sturesson C, Sugiura T, Sumo M, Sutcliffe R, Teh C, Teo J, Tepetes K, Thapa P, Thepbunchonchai A, Torres J, Torres O, Torzili G, Tovikkai C, Troncoso A, Tsoulfas G, Tuzuher A, Tzimas G, Umar G, Urbani L, Vanagas T, Varga, Velayutham V, Vigano L, Wakai T, Yang Z, Yip V, Zacharoulis D, Zakharov E, Zimmitti G. Heterogeneity of management practices surrounding operable gallbladder cancer - results of the OMEGA-S international HPB surgical survey. HPB (Oxford) 2022; 24:2006-2012. [PMID: 35922277 DOI: 10.1016/j.hpb.2022.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/22/2022] [Accepted: 06/28/2022] [Indexed: 12/12/2022]
Abstract
BACKGROUND Gallbladder cancer (GBC) is an aggressive, uncommon malignancy, with variation in operative approaches adopted across centres and few large-scale studies to guide practice. We aimed to identify the extent of heterogeneity in GBC internationally to better inform the need for future multicentre studies. METHODS A 34-question online survey was disseminated to members of the European-African Hepatopancreatobiliary Association (EAHPBA), American Hepatopancreatobiliary Association (AHPBA) and Asia-Pacific Hepatopancreatobiliary Association (A-PHPBA) regarding practices around diagnostic workup, operative approach, utilization of neoadjuvant and adjuvant therapies and surveillance strategies. RESULTS Two hundred and three surgeons responded from 51 countries. High liver resection volume units (>50 resections/year) organised HPB multidisciplinary team discussion of GBCs more commonly than those with low volumes (p < 0.0001). Management practices exhibited areas of heterogeneity, particularly around operative extent. Contrary to consensus guidelines, anatomical liver resections were favoured over non-anatomical resections for T3 tumours and above, lymphadenectomy extent was lower than recommended, and a minority of respondents still routinely excised the common bile duct or port sites. CONCLUSION Our findings suggest some similarities in the management of GBC internationally, but also specific areas of practice which differed from published guidelines. Transcontinental collaborative studies on GBC are necessary to establish evidence-based practice to minimise variation and optimise outcomes.
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Affiliation(s)
- Anita Balakrishnan
- Department of HPB Surgery, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge, CB2 0QQ, United Kingdom.
| | - Asif Jah
- Department of HPB Surgery, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge, CB2 0QQ, United Kingdom
| | - Mickael Lesurtel
- Department of HPB Surgery and Liver Transplantation, Beaujon Hospital, University of Paris Cité, 100 Bd du Général Leclerc, 92110, Clichy, France
| | - Bodil Andersson
- Department of Surgery, Lund University, Skane University Hospital, Lund, Sweden
| | - Paul Gibbs
- Department of HPB Surgery, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge, CB2 0QQ, United Kingdom
| | - Simon J F Harper
- Department of HPB Surgery, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge, CB2 0QQ, United Kingdom
| | - Emmanuel L Huguet
- Department of HPB Surgery, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge, CB2 0QQ, United Kingdom
| | - Vasilis Kosmoliaptsis
- Department of HPB Surgery, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge, CB2 0QQ, United Kingdom
| | - Siong S Liau
- Department of HPB Surgery, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge, CB2 0QQ, United Kingdom
| | - Raaj K Praseedom
- Department of HPB Surgery, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge, CB2 0QQ, United Kingdom
| | - Jose M Ramia
- Department of Surgery, Hospital General Universitario de Alicante, Avenida Pintor Baeza, 12 03010 Alicante, Spain
| | - Alejandro Branes
- Department of HPB Surgery, Hospital Sotero del Rio, Av. Concha y Toro 3459, Puente Alto, Región Metropolitana, Chile
| | - Javier Lendoire
- Department of Surgery, University of Buenos Aires, Hospital Dr Cosme Argerich, Buenos Aires, Argentina
| | - Shishir Maithel
- Department of Surgery, Emory University School of Medicine, Atlanta, GA, 30322 USA
| | - Alejandro Serrablo
- Department of HPB Surgery, Miguel Servet University Hospital, Zaragoza, Spain
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De Souza S, Kahol de Jong J, Jones R, Reeves H, Shetty S, Orr J, Bettinger D, Yip V, Temperley L, Geh D, Qurashi M, Allen B, Sturm L, Banerjee A, Ross P, Sharma R. 716P Impact of COVID-19 pandemic on clinical outcomes in hepatocellular carcinoma: A multicentre cohort study. Ann Oncol 2022. [PMCID: PMC9472550 DOI: 10.1016/j.annonc.2022.07.840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
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Balogun M, Millette D, Yip V, Chan SA, Lee P, Gamal N, Hashim N, Phillips D, Walsh M, Trehan P, Hanna-Bashara L, Abdullah A, Wernham A, Tso S. Phenotypic spectrum of serious cutaneous-only adverse event following immunization with COVID-19 vaccines: a multicentre case series and literature review. Clin Exp Dermatol 2021; 47:614-616. [PMID: 34748655 PMCID: PMC8653198 DOI: 10.1111/ced.15003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 11/04/2021] [Indexed: 01/26/2023]
Affiliation(s)
- M Balogun
- Birmingham Skin Centre, Sandwell and West Birmingham NHS Foundation Trust, Birmingham, UK
| | - D Millette
- Department of Dermatology, The Dudley Group NHS Foundation Trust, Dudley, UK
| | - V Yip
- Department of Dermatology, Liverpool University Hospitals, NHS Foundation Trust, Liverpool, UK
| | - S A Chan
- Birmingham Skin Centre, Sandwell and West Birmingham NHS Foundation Trust, Birmingham, UK
| | - P Lee
- Birmingham Skin Centre, Sandwell and West Birmingham NHS Foundation Trust, Birmingham, UK
| | - N Gamal
- Dermatology, Faculty of Medicine, Menoufia University, Shebin El-Kom, Egypt
| | - N Hashim
- Department of Dermatology, Clatterbridge Hospital, Wirral University Teaching Hospital NHS Foundation Trust, Bebington, UK
| | - D Phillips
- Department of Dermatology, Clatterbridge Hospital, Wirral University Teaching Hospital NHS Foundation Trust, Bebington, UK
| | - M Walsh
- Department of Dermatology, St Helens and Knowsley NHS Foundation Trust, Prescot, UK
| | - P Trehan
- Department of Dermatology, St Helens and Knowsley NHS Foundation Trust, Prescot, UK
| | - L Hanna-Bashara
- Department of Dermatology, St Helens and Knowsley NHS Foundation Trust, Prescot, UK
| | - A Abdullah
- Department of Dermatology, The Dudley Group NHS Foundation Trust, Dudley, UK
| | - A Wernham
- Department of Dermatology, Walsall Healthcare NHS Foundation Trust, Walsall, UK
| | - S Tso
- Jephson Dermatology Centre, South Warwickshire NHS Foundation Trust, Warwick, UK
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Sheel ARG, Baron RD, Dickerson LD, Ghaneh P, Campbell F, Raraty MGT, Yip V, Halloran CM, Neoptolemos JP. The Liverpool duodenum-and spleen-preserving near-total pancreatectomy can provide long-term pain relief in patients with end-stage chronic pancreatitis. Langenbecks Arch Surg 2019; 404:831-840. [PMID: 31748872 DOI: 10.1007/s00423-019-01837-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 11/04/2019] [Indexed: 12/13/2022]
Abstract
PURPOSE Total pancreatectomy may improve symptoms in patients with severe end-stage chronic pancreatitis. This might be achieved whilst preserving both the duodenum- and spleen-(DPSPTP). Mature clinical outcomes of this approach are presented. METHODS Single-centre prospective cohort study performed between September 1996 and May 2016. Demographic, clinical details, pain scores and employment status were prospectively recorded during clinic attendance. RESULTS Fifty-one patients (33 men, 18 women) with a median (interquartile range) age of 40.8 (35.3-49.4) years, a median weight of 69.8 (61.0-81.5) Kg and a median body mass index of 23.8 (21.5-27.8), underwent intended duodenum-and spleen-preserving near-total pancreatectomy for end-stage chronic pancreatitis. Aetiology was excess alcohol in 25, idiopathic (no mutation) in 15, idiopathic (SPINK-1/CFTR mutations) in two, hereditary (PRSS1 mutation) in seven and one each post-necrotising pancreatitis and obstructive pancreatic duct divisum in 1. The main indication for surgery was severe pain. Findings included parenchymal calcification in 79% and ductal calculi in 24%, a dilated main pancreatic duct in 57% and a dilated main bile duct in 17%, major vascular involvement in 27% and pancreato-peritoneal fistula in 2%. Postoperative complications occurred in 20 patients with two deaths. Median pain scores were 8 (7-8) preoperatively and 3 (0.25-5.75) at 5 years (p = 0.013). Opiate analgesic use was significantly reduced postoperatively (p = 0.048). Following surgery, 22 (63%) of 38 patients of working age re-entered employment compared with 12 (33%) working preoperatively (p = 0.016). CONCLUSION Duodenum-and spleen-preserving near-total pancreatectomy provided long-term relief in adult patients with intractable chronic pancreatitis pain, with improved employment prospects.
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Affiliation(s)
- A R G Sheel
- Department of Clinical Cancer Medicine, Institute of Translational Medicine, The University of Liverpool, Liverpool, UK
- Department of Pancreato-Biliary Surgery, The Royal Liverpool University Hospital, Liverpool, UK
| | - R D Baron
- Department of Clinical Cancer Medicine, Institute of Translational Medicine, The University of Liverpool, Liverpool, UK
- Department of Pancreato-Biliary Surgery, The Royal Liverpool University Hospital, Liverpool, UK
| | - L D Dickerson
- Department of Pancreato-Biliary Surgery, The Royal Liverpool University Hospital, Liverpool, UK
| | - P Ghaneh
- Department of Clinical Cancer Medicine, Institute of Translational Medicine, The University of Liverpool, Liverpool, UK
- Department of Pancreato-Biliary Surgery, The Royal Liverpool University Hospital, Liverpool, UK
| | - F Campbell
- Department of Histopathology, The Royal Liverpool University Hospital, Liverpool, UK
| | - M G T Raraty
- Department of Pancreato-Biliary Surgery, The Royal Liverpool University Hospital, Liverpool, UK
| | - V Yip
- The Royal London Hospital, Whitechapel, London, UK
| | - C M Halloran
- Department of Clinical Cancer Medicine, Institute of Translational Medicine, The University of Liverpool, Liverpool, UK
- Department of Pancreato-Biliary Surgery, The Royal Liverpool University Hospital, Liverpool, UK
| | - J P Neoptolemos
- Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Im Neuenheimer Feld 110, 69120, Heidelberg, Baden-Württemberg, Germany.
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Hay D, Ryan G, Somasundaram M, Yip V, Navaratne L. Laparoscopic management of a migrated intragastric balloon causing mechanical small bowel obstruction: a case report and review of the literature. Ann R Coll Surg Engl 2019; 101:e172-e177. [PMID: 31672034 DOI: 10.1308/rcsann.2019.0104] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Intragastric balloons have been used as an invasive non-surgical treatment for obesity for over 30 years. Within the last 37 years, we have found only 27 cases reported in the literature of intestinal obstruction caused by a migrated intragastric balloon. We report the laparoscopic management of such a case and make observations from similar case presentations published in the literature. A 26-year-old woman had an intragastric balloon placed endoscopically for weight control 13 months previously. She presented to the emergency department with a four-day history of intermittent abdominal cramps and vomiting. Contrast enhanced computed tomography confirmed the presence of the intragastric balloon within the small bowel. At laparoscopic retrieval, the deflated intragastric balloon was found impacted in the terminal ileum approximately 15 cm from the ileocaecal valve. The balloon was retrieved by enterotomy and primary closure of the ileum without event. The risk of balloon deflation and subsequent migration increases over time but several published cases demonstrate that this complication can occur within six months of insertion. The initial approach to the treatment of migrated intragastric balloons causing small bowel obstruction should be determined by the location of impaction, severity of obstruction and the available skill set of the attending radiologist, endoscopist and/or surgeon. Balloons causing obstruction in the duodenum are likely amenable to endoscopic retrieval whereas impaction within the jejunum or ileum could be managed by percutaneous needle aspiration (in selected cases), endoscopy (double-balloon enteroscopy), laparoscopy or open surgery.
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Affiliation(s)
- D Hay
- Department of General Surgery, Royal London Hospital, London, UK
| | - G Ryan
- Department of General Surgery, Royal London Hospital, London, UK
| | - M Somasundaram
- Department of General Surgery, Royal London Hospital, London, UK
| | - V Yip
- Department of General Surgery, Royal London Hospital, London, UK
| | - L Navaratne
- Department of General Surgery, Royal London Hospital, London, UK
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Kleeff J, Stöß C, Yip V, Knoefel WT. [Resection for advanced pancreatic cancer following multimodal therapy]. Chirurg 2016; 87:406-12. [PMID: 27138271 DOI: 10.1007/s00104-016-0184-3] [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] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Pancreatic cancer patients presenting with borderline resectable or locally advanced unresectable tumors remain a therapeutic challenge. Despite the lack of high quality randomized controlled trials, perioperative neoadjuvant treatment strategies are often employed for this group of patients. At present the FOLFIRINOX regimen, which was established in the palliative setting, is the backbone of neoadjuvant therapy, whereas local ablative treatment, such as stereotactic irradiation and irreversible electroporation are currently under investigation. Resection after modern multimodal neoadjuvant therapy follows the same principles and guidelines as upfront surgery specifically regarding the extent of resection, e.g. lymphadenectomy, vascular resection and multivisceral resection. Because it is still exceedingly difficult to predict tumor response after neoadjuvant therapy, a special treatment approach is necessary. In the case of localized stable disease following neoadjuvant therapy, aggressive surgical exploration with serial frozen sections at critical (vascular) margins might be necessary to minimize the risk of debulking procedures and maximize the chance of a curative resection. A multidisciplinary and individualized approach is mandatory in this challenging group of patients.
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Affiliation(s)
- J Kleeff
- Department of Surgery, The Royal Liverpool and Broadgreen University Hospitals NHS Trust, Prescot Street, L7 8XP, Liverpool, UK. .,Department of Molecular and Clinical Cancer Medicine, Institute of Translational Medicine, University of Liverpool, Liverpool, UK. .,Klinik für Allgemein-, Viszeral- und Kinderchirurgie, Universitätsklinikum Düsseldorf, Düsseldorf, Deutschland.
| | - C Stöß
- Technische Universität München, München, Deutschland
| | - V Yip
- Department of Surgery, The Royal Liverpool and Broadgreen University Hospitals NHS Trust, Prescot Street, L7 8XP, Liverpool, UK
| | - W T Knoefel
- Klinik für Allgemein-, Viszeral- und Kinderchirurgie, Universitätsklinikum Düsseldorf, Düsseldorf, Deutschland
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Yip V, Michael BD, Nahser HC, Smith D. Arteriovenous malformation: a rare cause of trigeminal neuralgia identified by magnetic resonance imaging with constructive interference in steady state sequences. QJM 2012; 105:895-8. [PMID: 21873633 DOI: 10.1093/qjmed/hcr141] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- V Yip
- The Walton Centre for Neurology and Neurosurgery, Fazakerly, UK
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Misra N, Grimes N, Stattner S, Yip V, Poston G. 108. Continuing changes in the epidemiology of gastric and oesophageal cancer – An analysis of trends in national incidence in England between 1971 and 2008. Eur J Surg Oncol 2012. [DOI: 10.1016/j.ejso.2012.06.108] [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] Open
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Ho SC, Chan SG, Yip V, Chan C, Law CL. F160 Physical activity, climacteric symptoms and bone mass in Hong Kong perimenopausal women. Maturitas 1996. [DOI: 10.1016/s0378-5122(97)81123-1] [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: 10/18/2022]
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Yip V, Arntfield S, Hydamaka A. Potential for Stainless Steel Microfiltration Processing to Reduce Effluent from a Fluid Milk and Ice Cream Processing Plant. J Dairy Sci 1996. [DOI: 10.3168/jds.s0022-0302(96)76417-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Yip V, Carter JG, Pusateri ME, McDougal DB, Lowry OH. Distribution in brain and retina of four enzymes of acetyl CoA synthesis in relation to choline acetyl transferase and acetylcholine esterase. Neurochem Res 1991; 16:629-35. [PMID: 1686472 DOI: 10.1007/bf00965548] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [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: 12/28/2022]
Abstract
Eleven regions of mouse brain and twelve layers of monkey retina were assayed for choline acetyl transferase (ChAT), acetylcholine esterase (AChE), and 4 enzymes that synthesize acetyl CoA. The purpose was to seek evidence concerning the source of acetyl CoA for acetylcholine generation. In brain ATP citrate lyase was strongly correlated with ChAT as well as AChE (r = 0.914 in both cases). Weak, but statistically significant correlation, was observed between ChAT and both cytoplasmic and mitochondrial thiolase, whereas there was a significant negative correlation between ChAT and acetyl thiokinase. In retina ChAT was essentially limited to the inner plexiform and ganglion cell layers, whereas substantial AChE activity extended as well into inner nuclear, outer plexiform and fiber layers, but no further. ATP citrate lyase activity was also highest in the inner four retinal layers, but was not strongly correlated with either ChAT or AChE (r = 0.724 and 0.761, respectively). Correlation between ChAT and acetyl thiokinase was at least as strong (r = 0.757), and in the six inner layers of retina, the correlation between ChAT and acetylthiokinase was very strong (r = 0.932).
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Affiliation(s)
- V Yip
- Department of Pharmacology, Washington University School of Medicine, St. Louis, Missouri 63110
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McDougal DB, Ferrendelli JA, Yip V, Pusateri ME, Carter JG, Chi MM, Norris B, Manchester J, Lowry OH. Use of nonradioactive 2-deoxyglucose to study compartmentation of brain glucose metabolism and rapid regional changes in rate. Proc Natl Acad Sci U S A 1990; 87:1357-61. [PMID: 2304903 PMCID: PMC53474 DOI: 10.1073/pnas.87.4.1357] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [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] [Indexed: 12/31/2022] Open
Abstract
A method is presented for measuring rapid changes in the rate of glucose phosphorylation in mouse brain with nonradioactive 2-deoxyglucose (DG). After times as short as 1 min after DG injection, the mouse is frozen rapidly, and selected brain regions are analyzed enzymatically for DG, 2-deoxyglucose 6-phosphate (DG6P), and glucose. The rate of glucose phosphorylation can be directly calculated from the rate of change in DG6P, the average levels of DG and glucose, and a constant derived from direct comparison of the rate of changes in glucose and DG6P after decapitation. Experiments with large brain samples provided evidence for a 2% per min loss of DG6P and at least two compartments differing in their rates of glucose metabolism, one rapidly entered by DG with glucose phosphorylation almost double that of average brain and another more slowly entered with a much lower phosphorylation rate. The method is illustrated by changes in phosphorylation within 2 min after injection of a convulsant or an anesthetic and over a 48-min time course with and without anesthesia. The sensitivity of the analytical methods can be amplified as much as desired by enzymatic cycling. Consequently, the method is applicable to very small brain samples. Examples are given for regions with volumes of 5 x 10(-4) microliters, but studies with samples as small as single large cell bodies are feasible.
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Affiliation(s)
- D B McDougal
- Department of Pharmacology, Washington University School of Medicine, Saint Louis, MO 63110
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Abstract
The distribution of glucose-1,6-bisphosphate (G16P2) synthase was measured in more than 70 regions of mouse brain, and nine layers of monkey retina. Activities in gray areas varied as much as 10-fold, in a hierarchical manner, from highest in telencephalon, especially the limbic system, to lowest in cerebellum, medulla, and spinal cord. The synthase levels were significantly correlated among different regions with G16P2 itself, as well as with previously published levels of a brain specific IMP-dependent G16P2 phosphatase. In contrast, neither G16P2 nor either its synthase or phosphatase correlated positively with phosphoglucomutase, and in all regions the G16P2 levels greatly exceeded requirements for activation of this mutase. This strengthens the view that G16P2 has some function besides serving as coenzyme for phosphoglucomutase. However, attempts to correlate the "G16P2 system," as defined by the three coordinately related elements, synthase, phosphatase, and G16P2, with other enzymes of carbohydrate metabolism, or with regional data of Sokoloff et al. [J. Neurochem. 28, 897-916 (1977)] for glucose consumption, were unsuccessful. This leaves open the possibility that brain G16P2 might serve as a phosphate donor for specific nonmetabolic effector proteins.
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Affiliation(s)
- V Yip
- Department of Pharmacology, Washington University School of Medicine, St. Louis, MO 63110
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Abstract
The activity of glucose-1,6-bisphosphatase and the level of its substrate were measured in 16 gray areas and four fiber areas of mouse brain and 10 layers or sublayers of monkey retina. Because of the low activity of the enzyme and the small sample sizes, it was necessary to develop a method with two different amplification steps (overall amplification about 10(6]. The enzyme ranged in activity 100-fold from a low in monkey retina photoreceptor cells to a high in the pyramidal layer of the hippocampus. However, in gray areas of the brain proper the range was only about fourfold. This, together with its requirement for IMP, suggests that the enzyme has a widespread metabolic function related to states of increased neuronal activity. Glucose-1,6-bisphosphate levels varied from 80 to 960 mu mol/kg dry weight in different areas of mouse brain and from 44 to 200 mu mol/kg dry weight in different layers of monkey retina. In general, the glucose bisphosphate levels correlated positively with the bisphosphatase activities; however, the three areas with the highest enzyme concentrations did not fit this pattern.
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