1
|
Rau P, McNamara P, Achebe I, Belkin D, Zadeh O, Marya NB. Catheter-based deployment of vascular plugs for the management of challenging gastric fistulae. VideoGIE 2023; 8:497-499. [PMID: 38155829 PMCID: PMC10751483 DOI: 10.1016/j.vgie.2023.08.004] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/30/2023]
Abstract
Video 1Case demonstrations of endoscopic vascular plug placement for challenging gastrointestinal fistulae.
Collapse
Affiliation(s)
- Prashanth Rau
- University of Massachusetts Chan Medical School, Worcester, Massachusetts
| | - Philip McNamara
- University of Massachusetts Chan Medical School, Worcester, Massachusetts
| | - Ikechukwu Achebe
- University of Massachusetts Chan Medical School, Worcester, Massachusetts
| | - Dimitri Belkin
- University of Massachusetts Chan Medical School, Worcester, Massachusetts
| | - Odel Zadeh
- University of Massachusetts Chan Medical School, Worcester, Massachusetts
| | - Neil B Marya
- University of Massachusetts Chan Medical School, Worcester, Massachusetts
| |
Collapse
|
2
|
Belkin D, Colletta A, Hanscom M, Rau P, Rau S, Marya NB. Management of an iatrogenic duodenal perforation with a helical tack system in a patient with pancreatic cancer complicated by gastric outlet obstruction. VideoGIE 2023; 8:137-139. [PMID: 36935812 PMCID: PMC10020155 DOI: 10.1016/j.vgie.2022.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Video 1Closure of an iatrogenic perforation with helical tack system and subsequent EUS-guided choledochoduodenostomy.
Collapse
Affiliation(s)
- Dimitri Belkin
- University of Massachusetts Chan Medical School, Worchester, Massachusetts
| | | | | | - Prashanth Rau
- University of Massachusetts Chan Medical School, Worchester, Massachusetts
| | - Sanjay Rau
- Jefferson Health Northeast, Philadelphia, Pennsylvania
| | - Neil B Marya
- University of Massachusetts Chan Medical School, Worchester, Massachusetts
| |
Collapse
|
3
|
Rau P, Petersile M, Marya NB. Vigilance for barotrauma with the use of topical mineral powder hemostasis. Gastrointest Endosc 2023; 97:601-603. [PMID: 36801020 DOI: 10.1016/j.gie.2022.09.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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] [Received: 08/23/2022] [Accepted: 09/27/2022] [Indexed: 11/17/2022]
Affiliation(s)
- Prashanth Rau
- University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA
| | - Matthew Petersile
- University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA
| | - Neil B Marya
- University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA
| |
Collapse
|
4
|
Hanscom M, Rau P, Marya NB. After sleeve gastrectomy, not all coughing is reflux. Gastrointest Endosc 2023; 97:595-596. [PMID: 36243105 DOI: 10.1016/j.gie.2022.10.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 06/28/2022] [Revised: 08/02/2022] [Accepted: 10/07/2022] [Indexed: 02/08/2023]
Affiliation(s)
- Mark Hanscom
- Division of Gastroenterology, University of Massachusetts Memorial Medical Center, Worcester, Massachusetts, USA
| | - Prashanth Rau
- Division of Gastroenterology, University of Massachusetts Memorial Medical Center, Worcester, Massachusetts, USA
| | - Neil B Marya
- Division of Gastroenterology, University of Massachusetts Memorial Medical Center, Worcester, Massachusetts, USA
| |
Collapse
|
5
|
Abstract
Video 1EUS-guided rendezvous technique for pancreas divisum.
Collapse
|
6
|
Rau S, Hanscom M, Abdelfattah A, Rau R, Rau P, Marya NB. Use of helical tack system for management of a high-risk fibrotic peptic ulcer. VideoGIE 2022; 8:42-45. [PMID: 36644244 PMCID: PMC9832219 DOI: 10.1016/j.vgie.2022.08.017] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background and Aims GI bleeding because of peptic ulcer disease is a well-described entity in its diagnosis and management. Although hemostatic clips and thermal therapy have been the primary tools in bleeding from peptic ulcer disease, some bleeds remain refractory. New data have shown that obliteration of the underlying arterial blood flow is needed to control refractory peptic ulcer bleeding. Although this has been shown with over-the-scope clips, we present a case where GI bleeding is controlled via a helical tack system. Although there are several available tools that can be used for treatment of upper GI bleeds, there remains a need for devices that can be used when standard methods of closure, such as with clips, cannot be performed because of a challenging location or friable mucosa. The aim of this video case is to demonstrate the use of a novel helical tack system as a salvage technique in the treatment of challenging upper GI bleeds. Methods One case of a bleeding GI ulcer that was refractory to standard endoscopic clips was identified. Results In this case, the ulcer closure was achieved using the helical tack system. There were no adverse events. The patient did not require additional surgical or endoscopic interventions. Conclusions The helical tack system is a novel device that may be useful as a salvage method for the cessation of GI bleeds refractory to standard clips. Additional comparative studies are needed to better understand the advantages and disadvantages of this system relative to other closure tools.
Collapse
Affiliation(s)
- Sanjay Rau
- Jefferson Northeast, Philadelphia, Pennsylvania
| | - Mark Hanscom
- University of Massachusetts Chan Medical School, Worcester, Massachusetts
| | - Ahmed Abdelfattah
- University of Massachusetts Chan Medical School, Worcester, Massachusetts
| | - Rohan Rau
- University of New England Osteopathic School of Medicine, Biddeford, Maine
| | - Prashanth Rau
- University of Massachusetts Chan Medical School, Worcester, Massachusetts
| | - Neil B. Marya
- University of Massachusetts Chan Medical School, Worcester, Massachusetts
| |
Collapse
|
7
|
Mahmoud T, Wong Kee Song LM, Stavropoulos SN, Alansari TH, Ramberan H, Fukami N, Marya NB, Rau P, Marshall C, Ghandour B, Bejjani M, Khashab MA, Haber GB, Aihara H, Antillon-Galdamez MR, Chandrasekhara V, Abu Dayyeh BK, Storm AC. Initial multicenter experience using a novel endoscopic tack and suture system for challenging GI defect closure and stent fixation (with video). Gastrointest Endosc 2022; 95:373-382. [PMID: 34695421 DOI: 10.1016/j.gie.2021.10.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [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: 07/12/2021] [Accepted: 10/12/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND AIMS Closure of endoscopic resection defects can be achieved with through-the-scope clips, over-the-scope clips, or endoscopic suturing. However, these devices are often limited by their inability to close large, irregular, and difficult-to-reach defects. Thus, we aimed to assess the feasibility and safety of a novel through-the-scope, suture-based closure system developed to overcome these limitations. METHODS This was a retrospective multicenter study involving 8 centers in the United States. Primary outcomes were feasibility and safety of early use of the device. Secondary outcomes were assessment of need for additional closure devices, prolonged procedure time, and technical feasibility of performing the procedure with an alternative device(s). RESULTS Ninety-three patients (48.4% women) with mean age 63.6 ± 13.1 years were included. Technical success was achieved in 83 patients (89.2%), and supplemental closure was required in 24.7% of patients (n = 23) with a mean defect size of 41.6 ± 19.4 mm. Closure with an alternative device was determined to be impossible in 24.7% of patients because of location, size, or shape of the defect. The use of the tack and suture device prolonged the procedure in 8.6% of cases but was considered acceptable. Adverse events occurred in 2 patients (2.2%) over a duration of follow-up of 34 days (interquartile range, 13-93.5) and were mild and moderate in severity. No serious adverse events or procedure-related deaths occurred. CONCLUSIONS The novel endoscopic through-the-scope tack and suture system is safe, efficient, and permits closure of large and irregularly shaped defects that were not possible with established devices.
Collapse
Affiliation(s)
- Tala Mahmoud
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Stavros N Stavropoulos
- Division of Gastroenterology and Hepatology, Department of Medicine, New York University School of Medicine-NYU Langone Hospital Long Island, Mineola, New York, USA
| | - Tarek H Alansari
- Division of Gastroenterology and Hepatology, Department of Medicine, New York University School of Medicine-NYU Langone Hospital Long Island, Mineola, New York, USA
| | | | - Norio Fukami
- Division of Gastroenterology and Hepatology, Mayo Clinic, Scottsdale, Arizona, USA
| | - Neil B Marya
- Division of Gastroenterology and Hepatology, UMASS Memorial Medical Center, Worchester, Massachusetts, USA
| | - Prashanth Rau
- Division of Gastroenterology and Hepatology, UMASS Memorial Medical Center, Worchester, Massachusetts, USA
| | - Christopher Marshall
- Division of Gastroenterology and Hepatology, UMASS Memorial Medical Center, Worchester, Massachusetts, USA
| | - Bachir Ghandour
- Division of Gastroenterology and Hepatology, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
| | - Michael Bejjani
- Division of Gastroenterology and Hepatology, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
| | - Mouen A Khashab
- Division of Gastroenterology and Hepatology, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
| | - Gregory B Haber
- Division of Gastroenterology, Center of Advanced Therapeutic and Innovation, NYU Langone Health, New York, New York, USA
| | - Hiroyuki Aihara
- Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | | | - Vinay Chandrasekhara
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Barham K Abu Dayyeh
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Andrew C Storm
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| |
Collapse
|
8
|
Talat A, Troy S, Rau P, Hanscom M, Singh A, Zivny J, Marshall C, Marya NB. Single-session EUS-guided gastroenterostomy and EUS-guided gallbladder drainage in a patient with concomitant gastric outlet obstruction and acalculous cholecystitis. VideoGIE 2021; 7:71-73. [PMID: 35146229 PMCID: PMC8819480 DOI: 10.1016/j.vgie.2021.10.011] [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] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
|
9
|
Hanscom M, Anders S, Hakimian S, Dudekala A, Rau P, Singh A, Zivny J, Churrango G, Bhattacharya K, Marshall C, Marya NB. Novel dilation technique and stent selection to reduce periprocedural adverse events in left hepaticogastrostomy. VideoGIE 2021; 6:460-463. [PMID: 34667912 PMCID: PMC8505228 DOI: 10.1016/j.vgie.2021.06.010] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/29/2022] Open
Abstract
Video 1Video demonstration of left hepaticogastrostomy with the assistance of an angioplasty balloon.
Collapse
Affiliation(s)
- Mark Hanscom
- Division of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Stephen Anders
- Division of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Shahrad Hakimian
- Division of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Anwar Dudekala
- Division of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Prashanth Rau
- Division of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Anupam Singh
- Division of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Jaroslav Zivny
- Division of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Gustavo Churrango
- Division of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Kanishka Bhattacharya
- Division of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Christopher Marshall
- Division of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Neil B Marya
- Division of Gastroenterology, University of Massachusetts Medical School, Worcester, Massachusetts
| |
Collapse
|
10
|
Rau P, Hanscom M, Amin D, Talat A, Dudekala A, Zivny J, Marshall C, Marya NB. Use of a novel helical tack system for the management of challenging upper gastrointestinal defects. VideoGIE 2021; 7:85-88. [PMID: 35146234 PMCID: PMC8819542 DOI: 10.1016/j.vgie.2021.09.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background and Aims Methods Results Conclusions
Collapse
|
11
|
Hakimian S, Raines D, Reed G, Hanscom M, Stefaniwsky L, Petersile M, Rau P, Foley A, Cave D. Assessment of Video Capsule Endoscopy in the Management of Acute Gastrointestinal Bleeding During the COVID-19 Pandemic. JAMA Netw Open 2021; 4:e2118796. [PMID: 34328500 PMCID: PMC8325069 DOI: 10.1001/jamanetworkopen.2021.18796] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
IMPORTANCE Evaluation of acute gastrointestinal (GI) bleeding using invasive endoscopic procedures comprising the standard of care (SOC)-upper endoscopy and colonoscopy-can expose the endoscopy staff to SARS-CoV-2. Video capsule endoscopy (VCE) does not generate aerosols and only requires 1 person to manage the procedure. OBJECTIVE To examine the safety of VCE for the initial evaluation of GI bleeding at the peak of the COVID-19 pandemic to identify signs of active bleeding while minimizing patient and personnel exposure, saving personal protective equipment, and avoiding invasive or unnecessary procedures. DESIGN, SETTING, AND PARTICIPANTS A multicenter (UMass Memorial Medical Center and Louisiana State University Health Sciences Center) retrospective cohort study including 146 patients with COVID-19 who received VCE as the first-line diagnostic modality was conducted from March 15 to June 15, 2020, compared with SOC in January 2020 for evaluation of GI bleeding. The association between treatment and outcomes was estimated using multivariable regression adjusting for potential confounders. Propensity score matching was used to verify the results. MAIN OUTCOMES AND MEASURES The primary end point was detection of active bleeding or stigmata of recent bleeding. Secondary end points included the number of patients requiring any invasive procedures, number of additional procedures, rates of rebleeding and rehospitalization, transfusion requirements, and mortality. RESULTS Among 146 patients, 92 (63.0%) were men; mean (SD) age was 64.93 (14.13) years in the COVID-19 group and 61.33 (13.39) years in the SOC group. Active bleeding or stigmata of recent bleeding was observed in 44 (59.5%) patients in the COVID-19 group compared with 18 (25.0%) in the SOC group (adjusted odds ratio, 5.23; 95% CI, 2.23 to 12.27). Only 36 patients (48.7%) in the COVID-19 group required any invasive procedure during the hospitalization compared with 70 (97.2%) in the SOC group (adjusted odds ratio, 0.01; 95% CI, 0.001 to 0.08). The mean (SD) number of invasive procedures was 0.59 (0.77) per patient in the COVID-19 group compared with 1.18 (0.48) per patient in the SOC group (adjusted difference, -0.54; 95% CI, -0.77 to -0.31). Both approaches appeared to be safe and there was no significant difference in transfusion requirements, rebleeding, rehospitalization, or in-hospital mortality. No mortality was attributed to GI bleeding in either group. CONCLUSIONS AND RELEVANCE In this cohort study, first-line diagnostic evaluation of acute GI bleeding using VCE appeared to be a safe and useful alternative to the traditional approach of upper endoscopy and colonoscopy. Use of VCE was associated with increased detection of active bleeding and a reduced number of invasive procedures and unnecessary exposure of personnel to SARS-CoV-2 and use of personal protective equipment.
Collapse
Affiliation(s)
- Shahrad Hakimian
- Department of Medicine, Division of Gastroenterology, University of Massachusetts Medical School, Worcester
- now with Department of Medicine, Division of Digestive Diseases, University of California, Los Angeles
| | - Daniel Raines
- Section of Gastroenterology, Louisiana State University Health Sciences Center, New Orleans
| | - George Reed
- Department of Medicine, Division of Gastroenterology, University of Massachusetts Medical School, Worcester
| | - Mark Hanscom
- Department of Medicine, Division of Gastroenterology, University of Massachusetts Medical School, Worcester
| | - Lilia Stefaniwsky
- Section of Gastroenterology, Louisiana State University Health Sciences Center, New Orleans
| | - Matthew Petersile
- Department of Medicine, Division of Gastroenterology, University of Massachusetts Medical School, Worcester
| | - Prashanth Rau
- Department of Medicine, Division of Gastroenterology, University of Massachusetts Medical School, Worcester
| | - Anne Foley
- Department of Medicine, Division of Gastroenterology, University of Massachusetts Medical School, Worcester
| | - David Cave
- Department of Medicine, Division of Gastroenterology, University of Massachusetts Medical School, Worcester
| |
Collapse
|
12
|
|
13
|
Fasullo M, Rau P, Liu DQ, Holzwanger E, Mathew JP, Guilarte-Walker Y, Szabo G. Proton pump inhibitors increase the severity of hepatic encephalopathy in cirrhotic patients. World J Hepatol 2019; 11:522-530. [PMID: 31293720 PMCID: PMC6603505 DOI: 10.4254/wjh.v11.i6.522] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 06/05/2019] [Accepted: 06/17/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Liver cirrhosis is the late stage of hepatic fibrosis and is characterized by portal hypertension that can clinically lead to decompensation in the form of ascites, esophageal/gastric varices or encephalopathy. The most common sequelae associated with liver cirrhosis are neurologic and neuropsychiatric impairments labeled as hepatic encephalopathy (HE). Well established triggers for HE include infection, gastrointestinal bleeding, constipation, and medications. Alterations to the gut microbiome is one of the leading ammonia producers in the body, and therefore may make patients more susceptible to HE.
AIM To investigate the relationship between the use of proton pump inhibitors (PPIs) and HE in patients with cirrhosis.
METHODS This is a single center, retrospective analysis. Patients were included in the study with an admitting diagnosis of HE. The degree of HE was determined from subjective and objective portions of hospital admission notes using the West Haven Criteria. The primary outcome of the study was to evaluate the grade of HE in PPI users versus non-users at admission to the hospital and throughout their hospital course. Secondary outcomes included rate of infection, gastrointestinal bleeding within the last 12 mo, mean ammonia level, and model for end-stage liver disease scores at admission.
RESULTS The HE grade at admission using the West Haven Criteria was 2.3 in the PPI group compared to 1.7 in the PPI nonuser group (P = 0.001). The average length of hospital stay in PPI group was 8.3 d compared to 6.5 d in PPI nonusers (P = 0.046). Twenty-seven (31.8%) patients in the PPI user group required an Intensive Care Unit admission during their hospital course compared to 6 in the PPI nonuser group (16.7%) (P = 0.138). Finally, 10 (11.8%) patients in the PPI group expired during their hospital stay compared to 1 in the PPI nonuser group (2.8%) (P = 0.220).
CONCLUSION Chronic PPI use in cirrhotic patients is associated with significantly higher average West Haven Criteria for HE compared to patients that do not use PPIs.
Collapse
Affiliation(s)
- Matthew Fasullo
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01605, United States
| | - Prashanth Rau
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01605, United States
| | - Dong-Qi Liu
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01605, United States
| | - Erik Holzwanger
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01605, United States
| | - Jomol P Mathew
- Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA 01605, United States
| | - Yurima Guilarte-Walker
- Department of Data Sciences and Technology, Information Technology, University of Massachusetts Medical School, Worcester, MA 01605, United States
| | - Gyongyi Szabo
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01605, United States
| |
Collapse
|
14
|
Peehs M, Rau P. Technological Development Concerning the Gas-Cooled Fast Breeder Reactor Test Bundle for the Irradiation Test in the Helium Loop at Mol. NUCL TECHNOL 2017. [DOI: 10.13182/nt76-a31621] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Peehs
- Kraftwerk Union Aktiengesellschaft Hammerbacherstr. 12u14, D 8520 Erlangen, Federal Republic of Germany
| | - P. Rau
- Kraftwerk Union Aktiengesellschaft Hammerbacherstr. 12u14, D 8520 Erlangen, Federal Republic of Germany
| |
Collapse
|
15
|
Schoonmaker M, Carayannis E, Rau P. The role of marketing activities in the fuzzy front end of innovation: a study of the biotech industry. J Technol Transf 2012. [DOI: 10.1007/s10961-012-9296-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
16
|
Cheng X, Schulenberg T, Bittermann D, Rau P. Design analysis of core assemblies for supercritical pressure conditions. Nuclear Engineering and Design 2003. [DOI: 10.1016/s0029-5493(03)00059-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
17
|
Hess R, Rau P, Schwab M, Paetzold S, Kuther M, Obert M, Agostini H, Haessler C, Braun DG, Brandner G. Covalent immunochemical membrane labeling of viable cells with K698-T708, a simian virus 40 tumor antigen-derived peptide. Pept Res 1994; 7:146-52. [PMID: 7521699] [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] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The process of covalent immunochemical linking of viable cell membranes with a Simian Virus 40 (SV40) tumor antigen-derived undecapeptide, K(698)PPTPPPEPET(708) (KT), is described. The principle applied was the reaction of the lysine residue, K 698, of the undecapeptide with the succinimidyl moiety of a heterobifunctional linker molecule, N-succinimidyl-3-(2-pyridyldithio)propionate (SPDP) or sulfosuccinimidyl(4-iodo-acetyl)aminobenzoate (sulfo-SIAB). Thereby, upon release of N-hydroxy-succinimide, the rest of the linker molecule reacts covalently with the epsilon-NH2 group of lysine. Upon release of pyridyl-2-thion or hydrogen iodide, respectively, the second reactive moiety of the linker is then ready to form a covalent bond with SH-groups of cell membrane compounds. As a result, KT is covalently linked onto the cell membrane by an -SS- or an -S-bond, respectively. Binding is prevented by treatment of the candidate cells with iodoacetamide, an SH-reactive compound. This artificial cell membrane epitope can be demonstrated by surface immunofluorescence and by binding to immunomagnetic beads loaded with PAb1605, a KT-specific monoclonal antibody. Quantitation by cytofluorimetry shows some 10(4) KT molecules bound per cell, a number that is in the range of the number of SV40 tumor antigen molecules of genuine SV40-transformed mammalian cells.
Collapse
Affiliation(s)
- R Hess
- Abteilung Virologie, Institut für Medizinische Mikrobiologie & Hygiene, Freiburg, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Rana T, Raman L, Rau P, Rao KV. Association of growth status & age at menarche in urban upper middle income group girls of Hyderabad. Indian J Med Res 1986; 84:522-30. [PMID: 3557575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
|
19
|
|
20
|
Rau P, Steele G, Guyton S, Forman J, Wilson RE, Zamcheck N. Relationship of intestinal obstruction to serial plasma carcinoembryonic antigen levels. Surg Gynecol Obstet 1980; 151:609-16. [PMID: 7434169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Since it has been suggested that colonic obstruction due to carcinoma may play a role in elevations of circulating carcinoembryonic antigen, serial plasma carcinoembryonic antigen levels were studies in 19 patients with intestinal obstruction due to tumor and nontumor causes. Regardless of cause, eight of ten patients with colonic obstruction did not show decreased carcinoembryonic antigen levels after decompression. Two patients with postoperative carcinoembryonic antigen reductions of greater than 40 per cent had ascite removed at operation. Removal of a large volume of carcinoembryonic antigen-rich ascites was thought to contribute to the fall in circulating carcinoembryonic antigen. Six patients with small intestinal obstruction and one patient with large and small intestinal obstruction did not show a reduction in postdecompression carcinoembryonic antigen levels. One patient with Crohn's disease who underwent ileal resection and one with intestinal obstruction due to carcinoma of the ovary who underwent resection at the time of decompression had a greater than 40 per cent reduction in postoperative carcinoembryonic antigen levels. Inflamed intestinal and carcinoma of the ovary are known sources of carcinoembryonic antigen and their removal could explain the decrease in carcinoembryonic antigen. Rehydration, as monitored by plasma osmolality and protein concentration, did not explain changes in plasma carcinoembryonic antigen. Thus, it appears that carcinoembryonic antigen production may play a more significant role in the regulation of circulating carcinoembryonic antigen than the physiopathologic processes associated with obstruction.
Collapse
|
21
|
Steele G, Zamcheck N, Wilson R, Mayer R, Lokich J, Rau P, Maltz J. Results of CEA-initiated second-look surgery for recurrent colorectal cancer. Am J Surg 1980; 139:544-8. [PMID: 7369462 DOI: 10.1016/0002-9610(80)90335-9] [Citation(s) in RCA: 76] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
22
|
Loewenstein MS, Rau P, Rittgers RA, Adhinarayanan BG, Kupchik HZ, Zamcheck N. Duodenal carcinoembryonic antigen in patients with benign and malignant diseases: preliminary observations. J Natl Cancer Inst 1980; 64:235-40. [PMID: 6928218 DOI: 10.1093/jnci/64.2.235] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
|
23
|
Cook AG, Maniscalco JA, Bärs B, Jabs RH, Jester WA, Peehs M, Rau P, Kelley JA, Wallace RM, Booker MK, Sikka VK, Anderson EE, Wire GL, Straalsund JL, Pitner AL, Horton JH, Albenesius EL. Authors. NUCL TECHNOL 1976. [DOI: 10.13182/nt76-a31617] [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: 11/12/2022]
|
24
|
Kumari VK, Damodaran M, Rau P. Evaluation of domicilliary management of protein-calorie malnutrition. Trop Geogr Med 1975; 27:99-102. [PMID: 806153] [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: 12/24/2022]
Abstract
An approach to tackle protein-calorie malnutrition through domiciliary management is described. Children suffering from moderate and severe protein-calorie malnutrition were managed using a food supplement containing low cost locally available foodstuffs and nutrition education. An evaluation showed that the anthropometric improvement was closely associated with better concepts in nutrition and improved dietary practices following nutrition education. Parents of children suffering from kwashiorkor had better knowledge and practice compared with those of marasmus.
Collapse
|
25
|
|
26
|
|
27
|
|
28
|
|