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Kumari S, Kumar RR, Mendiratta SK, Kumar D, Kumar A, Jawla J, Anurag, Rana P, Kumar D. Development of loop-mediated isothermal method and comparison with conventional PCR assay for rapid on spot identification of tissue of cattle origin. J Food Sci Technol 2021; 58:4608-4615. [PMID: 34629525 DOI: 10.1007/s13197-020-04948-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 10/24/2020] [Accepted: 12/21/2020] [Indexed: 11/30/2022]
Abstract
Loop-mediated isothermal amplification (LAMP) is a diagnostic method for meat speciation with rapid and minimal equipment requirements. In this study, we developed cattle-specific tube-based LAMP assays targeting mitochondrial Cyt b gene sequence, compared with conventional PCR assay for specificity, sensitivity, and validation of the assay was made. The LAMP reaction was carried at 64 °C for 45 min, and results were confirmed by SYBR Green I dye and agarose gel-electrophoresis. The specificity of the assays was cross-tested with DNA of buffalo, goat, sheep, and pork. The amplification was observed with samples from cattle only without cross-reactivity with other meat species. The analytical sensitivity of LAMP and PCR method for cattle DNA detection was 0.0001 ng and 1 ng, respectively. Repeatability of the assay was achieved on samples from known/blind and admixture meat with other than cattle at the relative percentage of 20%, 10%, 5%, and 1%. The study concluded that the developed assay can be easily employed for the rapid identification of tissue of cattle origin in meat and meat products in low resource areas.
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Affiliation(s)
- Sarita Kumari
- Division of Livestock Products Technology, Indian Veterinary Research Institute, Izatngar, Bareilly, 243122 India.,Division of Livestock Products Technology, Rajasthan University of Veterinary and Animal Sciences, Bikaner, 334001 India
| | - R R Kumar
- Division of Livestock Products Technology, Indian Veterinary Research Institute, Izatngar, Bareilly, 243122 India
| | - S K Mendiratta
- Division of Livestock Products Technology, Indian Veterinary Research Institute, Izatngar, Bareilly, 243122 India
| | - Dhananjay Kumar
- Division of Livestock Products Technology, Indian Veterinary Research Institute, Izatngar, Bareilly, 243122 India
| | - Arun Kumar
- Division of Livestock Products Technology, Indian Veterinary Research Institute, Izatngar, Bareilly, 243122 India.,Division of Livestock Products Technology, Rajasthan University of Veterinary and Animal Sciences, Bikaner, 334001 India
| | - Jyoti Jawla
- Division of Livestock Products Technology, Indian Veterinary Research Institute, Izatngar, Bareilly, 243122 India
| | - Anurag
- Division of Livestock Production Management, Rajasthan University of Veterinary and Animal Sciences, Bikaner, 334001 India
| | - Preeti Rana
- Division of Livestock Products Technology, Indian Veterinary Research Institute, Izatngar, Bareilly, 243122 India
| | - Deepak Kumar
- Division of Veterinary Biotechnology, Indian Veterinary Research Institute, Izatngar, Bareilly, 243122 India
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Affiliation(s)
- R R Kumar
- Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - S Jha
- Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - A Dhooria
- Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - V Dhir
- Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
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Dwivedi P, Kumar RR, Dhooria A, Adarsh MB, Malhotra S, Kakkar N, Naidu S, Sharma SK, Sharma A, Jain S, Dhir V. Corticosteroid-associated lupus pancreatitis: a case series and systematic review of the literature. Lupus 2019; 28:731-739. [PMID: 31023131 DOI: 10.1177/0961203319844004] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Acute pancreatitis is an uncommon complication that occurs in 0.85% to 4% of patients with systemic lupus erythematosus (SLE). In some patients, it occurs within days to weeks of starting medium-to-high dose corticosteroids. The authors have used the term 'corticosteroid-associated lupus pancreatitis' for these patients, and they report a case series and perform a systematic review of previously published reports. METHODS For the purpose of this study, corticosteroid-associated lupus pancreatitis was defined as occurrence of acute pancreatitis in patients with SLE (fulfilling the 1997 ACR), within 3 weeks of starting therapy with medium-to-high dose corticosteroids - either newly initiated or escalated from a lower dose. All patients with SLE admitted in the last 2.5 years in a North Indian university hospital were reviewed, and those with pancreatitis who fulfilled the above criteria were included in the case series. For the systematic review, a PUBMED search using the keywords 'lupus' and 'pancreatitis' was performed, and reports in English were reviewed for an association with corticosteroids. RESULTS Among 420 admissions of SLE patients, six patients (1.4%) fulfilled criteria for corticosteroid-associated lupus pancreatitis. All were female, with mean age and disease duration of 19.7 ± 3.3 and 3.8 ± 2.5 years respectively. All had active disease and developed acute pancreatitis within 48-72 hours of newly initiating medium-to-high dose corticosteroids (in three patients) or escalating them to medium-high dose (in three patients). After the development of pancreatitis, corticosteroids were continued in all except one patient. In addition, two patients received pulse methylprednisolone, two received pulse cyclophosphamide and one was started on azathioprine. Three patients died during hospitalization, all with severe pancreatitis. On systematic review, among 451 cases of lupus pancreatitis reported, 23 (5%) fulfilled criteria for 'corticosteroid-associated lupus pancreatitis'. A majority of them had pancreatitis within 3 days of starting treatment with medium-to-high dose corticosteroids. The mortality in these patients was 37.5%. CONCLUSION In a small but substantial proportion of patients with lupus who develop pancreatitis, it occurs within days to weeks of starting medium-to-high dose corticosteroids. Many of these patients continue to receive corticosteroids, and some receive more aggressive immunosuppression. However, they have significant mortality, and further studies are required to identify appropriate treatment in this subgroup of patients.
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Affiliation(s)
- P Dwivedi
- 1 Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - R R Kumar
- 1 Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - A Dhooria
- 1 Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - M B Adarsh
- 1 Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - S Malhotra
- 2 Department of Pathology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - N Kakkar
- 2 Department of Pathology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - S Naidu
- 1 Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - S K Sharma
- 1 Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - A Sharma
- 1 Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - S Jain
- 1 Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - V Dhir
- 1 Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
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Affiliation(s)
- R R Kumar
- Clinical Immunology and Rheumatology Wing, Department of Internal Medicine, Postgraduate Institute of Medical Education and Research, Sector-12, Chandigarh, India
| | - S Jha
- Clinical Immunology and Rheumatology Wing, Department of Internal Medicine, Postgraduate Institute of Medical Education and Research, Sector-12, Chandigarh, India
| | - A Sharma
- Clinical Immunology and Rheumatology Wing, Department of Internal Medicine, Postgraduate Institute of Medical Education and Research, Sector-12, Chandigarh, India
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Kedia A, Dwivedy AK, Pandey AK, Kumar RR, Regmi P, Dubey NK. Efficacy of chemically characterized Foeniculum vulgare Mill seed essential oil in protection of raw tobacco leaves during storage against fungal and aflatoxin contamination. J Appl Microbiol 2015; 119:991-8. [PMID: 26218659 DOI: 10.1111/jam.12915] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [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: 05/06/2015] [Revised: 06/29/2015] [Accepted: 07/08/2015] [Indexed: 01/18/2023]
Abstract
AIMS To report fungal and aflatoxin contamination in stored tobacco leaves and the potential of Foeniculum vulgare (fennel) seed essential oil (EO) as a plant-based preservative in protection of tobacco during storage. METHODS AND RESULTS Mycological analysis of tobacco samples was done by surface sterilization and serial dilution tests. The Aspergillus flavus isolates were screened for their toxigenicity. Both in vivo and in vitro tests were done to evaluate antifungal and antiaflatoxigenic efficacy of chemically characterized EO. The mycoflora analysis revealed 108 fungal colonies belonging to five genera and nine species. All A. flavus isolates were found aflatoxigenic during screening. Gas chromatography and mass spectrometry analysis of EO identified 19 components (99·66%); estragole being the major component (47·49%). The EO showed broad fungitoxicity at 1·25 μl ml(-1) and 100% inhibition to AFB1 production as well as ergosterol synthesis at 1·0 μl ml(-1) concentration. EO showed 100% protection of stored tobacco samples from aflatoxin B1 contamination. CONCLUSIONS The fennel EO can thus be formulated as a plant-based preservative for food items. SIGNIFICANCE AND IMPACT OF THE STUDY The present investigation comprises the first report on antiaflatoxin efficacy of fennel oil and its potency in the protection of tobacco leaves from fungal and aflatoxin contamination during storage.
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Affiliation(s)
- A Kedia
- Laboratory of Herbal Pesticides, Centre of advanced study in Botany, Banaras Hindu University, Varanasi, India
| | - A K Dwivedy
- Laboratory of Herbal Pesticides, Centre of advanced study in Botany, Banaras Hindu University, Varanasi, India
| | - A K Pandey
- Laboratory of Herbal Pesticides, Centre of advanced study in Botany, Banaras Hindu University, Varanasi, India
| | - R R Kumar
- Laboratory of Herbal Pesticides, Centre of advanced study in Botany, Banaras Hindu University, Varanasi, India
| | - P Regmi
- Laboratory of Herbal Pesticides, Centre of advanced study in Botany, Banaras Hindu University, Varanasi, India
| | - N K Dubey
- Laboratory of Herbal Pesticides, Centre of advanced study in Botany, Banaras Hindu University, Varanasi, India
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Raghavan R, Krishnamurthy S, Ganesh RN, Kumar RR, Mahadevan S. Takayasu arteritis: Association with mesangioproliferative glomerulonephritis in a 9-year-old child. Indian J Nephrol 2014; 24:407-8. [PMID: 25484544 PMCID: PMC4244730 DOI: 10.4103/0971-4065.134685] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- R Raghavan
- Department of Pediatrics, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - S Krishnamurthy
- Department of Pediatrics, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - R N Ganesh
- Department of Pathology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - R R Kumar
- Department of Pediatrics, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - S Mahadevan
- Department of Pediatrics, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
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Abstract
This study evaluated the protective potential of curcumin on the possible side effects of bortezomib (Bt) therapy on normal cells in mice. The mice were segregated into three groups ( n = 10) that included normal control, Bt-treated, and Bt + curcumin-treated groups. The Bt treatment resulted in significant decrease in the enzyme activity of erythrocyte δ-aminolevulinic acid dehydratase (ALAD). Also a significant decrease in the hemoglobin (Hb) was also noticed. On the other hand, curcumin co-treatment improvised enzyme activity of erythrocyte ALAD as well as Hb values. The study, therefore, concludes that curcumin co-treatment with Bt has a potential to take care of possible side effects of Bt therapy on normal cells.
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Affiliation(s)
- RR Kumar
- Department of Biophysics, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - A Malhotra
- Department of Biophysics, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
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Gokulakrishnan P, Kumar RR, Sharma BD, Mendiratta SK, Sharma D. Sex Determination of Cattle Meat by Polymerase Chain Reaction Amplification of the DEAD Box Protein (DDX3X/DDX3Y) Gene. Asian-Australas J Anim Sci 2012; 25:733-7. [PMID: 25049620 PMCID: PMC4093110 DOI: 10.5713/ajas.2012.12003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [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] [Received: 01/01/2012] [Revised: 03/17/2012] [Accepted: 02/21/2012] [Indexed: 11/27/2022]
Abstract
Determination of sex origin of cattle meat by fast and reliable molecular methods is an important measure to ensure correct allocation of export refunds particularly in European countries and also female cattle (cow) slaughter is legally banned in India because of religious beliefs. Based on the DEAD box protein gene located on the X and Y chromosomes, 2 pair of primers were designed and the system of PCR was optimized. Upon PCR amplification, male tissue showed 2 bands, while female tissue resulted in only one band. The accuracy and specificity of the primers was assessed using DNA template extracted from cattle meat of known sex. The protocol was subjected to a blind test and showed 100% concordance, proving its accuracy and reliability.
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Affiliation(s)
- P Gokulakrishnan
- Genome Mapping Laboratory, Central Avian Research Institute, Izatnagar, Bareilly (U.P.) 243 122, India
| | - R R Kumar
- Genome Mapping Laboratory, Central Avian Research Institute, Izatnagar, Bareilly (U.P.) 243 122, India
| | - B D Sharma
- Genome Mapping Laboratory, Central Avian Research Institute, Izatnagar, Bareilly (U.P.) 243 122, India
| | - S K Mendiratta
- Genome Mapping Laboratory, Central Avian Research Institute, Izatnagar, Bareilly (U.P.) 243 122, India
| | - D Sharma
- Genome Mapping Laboratory, Central Avian Research Institute, Izatnagar, Bareilly (U.P.) 243 122, India
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Kumar RR, Hay KD. Demographic analysis of oral lichen planus presentations to Auckland Oral Medicine Clinic from 1999 to 2006. N Z Dent J 2010; 106:113-114. [PMID: 20882741] [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: 05/29/2023]
Abstract
AIM The objective of this study was to describe the demographic characteristics of a case series of patients with a clinical and histopathological diagnosis of oral lichen planus who presented to the Oral Health Unit (Auckland District Health Board) between the years 1999 and 2006 (an 8-year period). METHOD The records of patients who had a clinical and histopathological diagnosis of oral lichen planus were audited. Demographic (age, gender, ethnicity), clinical and histopathological data were collated. Patients whose ethnicity was not recorded were noted but not included in this part of the analysis. RESULTS Between 1999 and 2006, 267 patients (82 males, 185 females; age range 21 to 93 years) had a clinical and histopathological diagnosis of oral lichen planus. Ethnicity data were available for 207 of those, of whom 108 (52.2%) were European; 65 (31.4%) of Indian subcontinent origin (India, Pakistan, Sri Lanka); 20 (9.7%) were Asian; 14 (6.8%) were Pacific Islanders; 50 (24.2%) were 'Other'; and 10 (4.8%) were 'Unknown'. None was Maori. CONCLUSION The age and gender distribution in this case series were similar to that observed in a comparable UK study. The major findings were in the ethnic distribution of oral lichen planus in the sample, with patients of Indian subcontinent origin being over-represented, and Māori being under-represented.
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Affiliation(s)
- R R Kumar
- Oral and Maxillofacial Unit, Adelaide Dental Hospital, South Australia
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Ravi M, Nazeer Basha A, Taju G, Ram Kumar R, Sahul Hameed AS. Clearance of Macrobrachium rosenbergii nodavirus (MrNV) and extra small virus (XSV) and immunological changes in experimentally injected Macrobrachium rosenbergii. Fish Shellfish Immunol 2010; 28:428-433. [PMID: 19963067 DOI: 10.1016/j.fsi.2009.11.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2009] [Revised: 11/23/2009] [Accepted: 11/23/2009] [Indexed: 05/28/2023]
Abstract
Macrobrachium rosenbergii was experimentally challenged with Macrobrachium rosenbergii nodavirus (MrNV) and extra small virus (XSV) to study the clearance of these viruses and consequent changes in various immunological parameters. The healthy animals were injected MrNV and XSV intramuscularly and various organ samples such as gill tissue, head soft tissue, pleopods and intestine were collected at different time intervals of 3, 5, 10, 15, 25, 50, 75 and 100d post-infection (p.i.) to study the viral clearance. Tissue tropism and clearing of MrNV and XSV were confirmed by RT-PCR, nested RT-PCR and bioassay. These 2 viruses failed to cause mortality or clinical signs of disease in injected adult prawns during the experimental period of 100 days. The result of RT-PCR analysis revealed that all the organs showed positive for both viruses by single step RT-PCR on 3, 5 and 10 d p.i., positive by nested RT-PCR on 15 and 20 d p.i. and all the organs became negative at 25 d p.i. onwards. The viral inoculum prepared from the tissue of MrNV and XSV-injected M. rosenbergii at 3, 5, 10, 15 and 20 d p.i. caused 100% mortality in post-larvae of M. rosenbergii at 9, 8, 7, 10 and 10 d p.i., respectively whereas the inoculum prepared at 25, 50 and 100 d p.i. failed to cause significant mortality in post-larvae of prawn. Immunological parameters such as proPO, superoxide anion, SOD, THC, clotting time and oxyhemocyanin were determined in MrNV and XSV-injected prawns and significant differences in some of the immunological parameters were found in the early days p.i. and became insignificant in the later days p.i.
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Affiliation(s)
- M Ravi
- OIE Reference Laboratory for WTD, Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
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Kumar A, Garg R, Yadav CL, Vatsya S, Kumar RR, Sugumar P, Chandran D, Mangamoorib LN, Bedarkar SN. Immune responses against recombinant tick antigen, Bm95, for the control of Rhipicephalus (Boophilus) microplus ticks in cattle. Vet Parasitol 2009; 165:119-24. [PMID: 19625129 DOI: 10.1016/j.vetpar.2009.06.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2009] [Revised: 06/20/2009] [Accepted: 06/23/2009] [Indexed: 11/17/2022]
Abstract
Immune responses against Bm95 recombinant cattle tick antigen and its protective efficacy for control of Rhipicephalus (Boophilus) microplus ticks were determined in experimental crossbred cow calves. Anti-Bm95 antibody titers, as assessed by indirect ELISA, in immunized calves ranged from 196.1+/-13.7 on day 0 to 7979.9+/-312.5 on day 110 post-primary immunization. The rise in antibody titer was statistically significant (p<0.01) throughout the study period. Besides this, constantly higher lymphoproliferative response (LPR), as assessed by lymphocyte stimulation test, was observed from 10 days post-immunization, but a positive LPR of antigen stimulated cells in immunized animals was recorded only on day 50 and day 70 post-immunization. Following challenge of immunized calves with larvae of R. microplus, significant increase (p<0.01) in rejection percentage, mean number of damaged ticks, mean percentage of dead ticks, and decrease in engorgement weight were recorded in immunized animals. Also, there were significant differences (p<0.01) in preoviposition period, oviposition period, egg mass weight and percent hatchability between the immunized and control calves. The percent reduction in number of adult females in vaccinated calves, reduction in mean weight of egg masses, percent reduction in mean weight and reduction in fertility of engorged females collected from vaccinated calves were determined and the efficacy of Bm95 recombinant cattle tick antigen was 81.27%.
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Affiliation(s)
- Amit Kumar
- Department of Veterinary Parasitology, College of Veterinary and Animal Sciences, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India
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Mohan PM, Chetan PS, Kumar RR. Phosalone-Induced Changes in Regional Cholinesterase Activities in Rat Brain during Behavioral Tolerance. ACTA ACUST UNITED AC 2009. [DOI: 10.4314/afrrev.v3i2.43602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Mohanty B, Arul S, Kumar RR, Kumar M, Ramaswamy S. Metabolic syndrome--prevalence and significance of its detection in selected population in Pondicherry. Indian J Physiol Pharmacol 2008; 52:307-310. [PMID: 19552065] [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: 05/28/2023]
Abstract
Obesity by itself is not an immediate lethal disease, however, it is a significant risk factor associated with a range of serious non-communicable diseases. Our aim is to find out the prevalence of metabolic syndrome in interns coming from higher socioeconomic class. Sixty one interns participated in the study. BMI, WHR and blood chemistry were performed. EGIR criteria were considered to identify the metabolic syndrome. According to EGIR criteria, insulin resistance was found in 24.5% cases and metabolic syndrome exists in 14.7% of overweight/obese interns. Insulin resistance as per HOMA-IR was found in 6% of those having metabolic syndrome. High diastolic blood pressure, low HDLc are prone to develop metabolic syndrome by six times where as an increase in WHR (central obesity) particularly in male are eleven times more prone to develop metabolic syndrome.
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Affiliation(s)
- Biswajit Mohanty
- Department of Biochemistry, Aarupadai Veedu Medical College and Hospital, Pondicherry 607 402.
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Konyalian VR, Rosing DK, Haukoos JS, Dixon MR, Sinow R, Bhaheetharan S, Stamos MJ, Kumar RR. The role of primary tumour resection in patients with stage IV colorectal cancer. Colorectal Dis 2007; 9:430-7. [PMID: 17504340 DOI: 10.1111/j.1463-1318.2007.01161.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [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: 12/19/2022]
Abstract
OBJECTIVE The management of stage IV colorectal cancer is controversial. Resection of the primary tumour to prevent obstruction, bleeding or perforation is the traditional approach, although survival benefit is undetermined. Management consisting of diverting ostomy, enteric bypass, laser recanalization or endoscopic stenting is an alternative to radical resection. The purpose of this study was to determine the role of resection of the primary tumour in patients with stage IV colorectal cancer, with specific attention paid to survival benefit and safety. METHOD This was a retrospective review of all stage IV colon and rectal cancer patients in our tumour registry between 1991 and 2002. Data collected included patient demographics, presenting symptoms, detail from the hospital course including diagnostic data and operative management, complications and survival time (days). Survival analysis was performed to assess the effect of primary tumour resection on long-term survival. RESULTS 109 patients were studied. Sixty-two (57%) patients (group I) underwent resection of the primary tumour, whereas 47 (43%) patients (group II) were managed without resection. Median survival times for groups I and II were 375 (IQR: 179-759) and 138 (IQR: 35-262) days respectively (P < 0.0001). After controlling for age, sex, tumour location and level of liver involvement as well as liver function, patients who underwent resection still survived longer (HR = 0.34, 95% CI: 0.21-0.55). CONCLUSION Palliative resection of the primary tumour plays an essential role in the management of stage IV colorectal cancer. Resection can offer increased survival and is indicated in certain patients with incurable disease. Limited metastatic tumour burden of the liver was associated with better survival in such patients.
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Affiliation(s)
- V R Konyalian
- Division of Colon and Rectal Surgery, Harbor-UCLA Medical Center, Torrance, California 90509, USA
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Garg R, Kumar RR, Yadav CL, Banerjee PS. Duration of anthelmintic effect of three formulations of ivermectin (oral, injectable and pour-on) against multiple anthelmintic-resistant haemonchus contortus in sheep. Vet Res Commun 2007; 31:749-55. [PMID: 17237985 DOI: 10.1007/s11259-007-0054-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/30/2006] [Indexed: 11/24/2022]
Abstract
We report the results of investigations that were conducted in a sheep flock in Uttaranchal, India where repeated failure of anthelmintic medication was noted. The study revealed that Haemonchus contortus in sheep had developed resistance to benzimidazoles (fenbendazole, mebendazole and albendazole), imidazothiazole (levamisole) and salicylanide (rafoxanide), while it was fully susceptible to avermectins (ivermectin). Further, the suppression of nematode egg output in faeces of sheep naturally infected with multiple anthelmintic-resistant H. contortus following treatment with ivermectin tablet (0.4 mg/kg body weight (bw), orally), ivermectin injection (1% w/v, 0.2 mg/kg bw, subcutaneously) and ivermectin pour-on (0.5 w/v, 0.5 mg/kg bw) was also studied over a period of 10 weeks post treatment. It was noted that ivermectin tablet after initial clearance of infection (faecal egg count reduction 100%), could not prevent establishment of new patent natural infection for even a single day, while ivermectin pour-on and injection prevented the establishment of new infection for 7 and 14 days post treatment, respectively. Maximum protection period (duration for which mean faecal egg count of sheep reaches 500 eggs per gram of faeces or more) of 68 days was recorded in sheep treated with injectable ivermectin, followed by pour-on (60 days) and oral (53 days) preparations.
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Affiliation(s)
- R Garg
- Department of Veterinary Parasitology, College of Veterinary and Animal Sciences, G.B. P.U.A.& T., Pantnagar-263145, Uttaranchal, India.
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Kumar RR, Ramanappa MV, Satish P. Radiological quiz - musculoskeletal. Indian J Radiol Imaging 2006. [DOI: 10.4103/0971-3026.32391] [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: 11/04/2022] Open
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Greilich PE, Okada K, Latham P, Kumar RR, Jessen ME. Aprotinin but not epsilon-aminocaproic acid decreases interleukin-10 after cardiac surgery with extracorporeal circulation: randomized, double-blind, placebo-controlled study in patients receiving aprotinin and epsilon-aminocaproic acid. Circulation 2001; 104:I265-9. [PMID: 11568067 DOI: 10.1161/hc37t1.094781] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [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: 11/16/2022]
Abstract
BACKGROUND Extracorporeal circulation induces a systemic inflammatory response, which may adversely affect organ function. One manifestation of this response is increased fibrinolysis. Antifibrinolytic drugs such as aprotinin and epsilon-aminocaproic acid have been effective in reducing fibrinolysis and blood loss after extracorporeal circulation; however, the effects of antifibrinolytic drugs on proinflammatory and anti-inflammatory mediators are not known. This study examined the effects of aprotinin and epsilon-aminocaproic acid on plasma levels of proinflammatory [interleukin-6 (IL-6)] and anti-inflammatory [interleukin-10 (IL-10)] cytokines during and after extracorporeal circulation. METHODS AND RESULTS Seventy-two patients undergoing coronary artery bypass grafting with extracorporeal circulation were randomly assigned in a double-blind study to receive high-dose aprotinin, epsilon-aminocaproic acid, or saline placebo. Plasma levels of IL-6 and IL-10 were measured at 5 time points before, during, and after extracorporeal circulation. In all 3 groups, both IL-6 and IL-10 rose significantly after institution of extracorporeal circulation and remained elevated through the first postoperative day. Compared with saline, aprotinin significantly reduced IL-10 (P=0.02) and peak IL-6 (P=0.02) after extracorporeal circulation. In contrast, none of the reductions in IL-6 and IL-10 by epsilon-aminocaproic acid achieved statistical significance. Both aprotinin and epsilon-aminocaproic acid decreased blood loss compared with saline, but there was no significant difference in the number of patients receiving blood products among the treatment groups. CONCLUSIONS These data suggest that aprotinin and epsilon-aminocaproic acid differ in their effects on the inflammatory response to extracorporeal circulation. Aprotinin but not epsilon-aminocaproic acid appears to attenuate the rise in the proinflammatory and anti-inflammatory cytokines IL-6 and IL-10. Further studies will be required to determine if these cytokine alterations translate to changes in clinical outcomes.
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Affiliation(s)
- P E Greilich
- Dallas Veterans Affairs Medical Center: Department of Anesthesiology and Pain Management, University of Texas Southwestern Medical Center, Dallas, USA
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18
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Abstract
Overexpession of EGFR has been reported in a variety of human cancers and serves as a target for diagnosis and therapy. In the case of breast cancer, about 48% EGFR and have poor clinical prognosis. Besides the prognostic factors like tumor size, nodal status, histological grade etc., which are significant in the management of breast cancer, EGFR level might also serve as an additional parameter. Immunocytochemical assay has been extensively used to study the expression of EGFR in various cancers. We have generated a panel of monoclonal antibodies against human EGFR with a view to evaluate their application for the diagnosis and therapy of these cancers. In the present study, an EIA has been developed using 2 monoclonal antibodies against hEGFR designated as CIBCNSH3 as the capture antibody and CIBCRGC1 as the detector antibody. EGFR isolated from MDA MB 468, a human breast carcinoma cell line, with high expression of EGFR and purified by conA affinity chromatography and HPLC has been used to develop the EIA procedure. Sera samples of 150 healthy women donors, of 300 breast cancer patients with different histological types of malignancies and of various other types of cancers have been analyzed. The control women had a range for serum EGFR level of 7-162 fmol/ml, whereas the 300 breast cancer patients studied had a range of 126-1587 fmol/ml with a cut off value of 180 fmol/ml. It is interesting to note that 67.5% of breast cancer patients had elevated levels of circulating EGFR. These results might suggest that serum EGFR level can be used as prognostic marker for breast cancer. The serum EGFR level will be compared with disease free interval and patient survival.
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Affiliation(s)
- R R Kumar
- Molecular Genetics Group, CDFD, Hyderabad 500 076, India
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19
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Mohan V, Deepa R, Kumar RR. Role of carotid intimal-medial thickness in assessment of pre-clinical atherosclerosis. Indian Heart J 2000; 52:395-9. [PMID: 11084778] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Affiliation(s)
- V Mohan
- M.V. Diabetes Specialities Centre & Madras Diabetes Research Foundation, Gopalapuram, Chennai
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20
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Abstract
Apoptosis is associated with cascades of biochemical changes, including caspase activation, cleavage of poly-ADP-ribose polymerase (PARP), and fragmentation of genomic DNA. Knowledge of the kinetics of these changes in drug-induced apoptosis is important for designing pharmacodynamic studies. We have shown that the slow manifestation of apoptosis contributes to the delayed pharmacological effects of paclitaxel (Cancer Res. 58:2141-2148, 1998). The present study examined the timing of the biochemical changes in paclitaxel-induced apoptosis in human prostate PC3 cancer cells. After treatment with 20 nM paclitaxel, the fraction of cells that detached from the culture flask increased with time to reach 68% at the end of the 96-hour experiment. In contrast, the control samples showed <1% detachment. The attached and detached paclitaxel-treated cells showed different biochemical properties. The detached cells exhibited the full spectrum of apoptotic changes, whereas the attached cells only showed activation of caspase-3-like proteases but not PARP cleavage, DNA fragmentation, nor release of DNA fragments to the cytoplasm. Activation of caspases in the attached cells was several-fold lower and occurred at a later time (ie, 24 vs 12 hours) compared to the detached cells. In the detached cells, caspase activation was first detected at 12 hours and peaked at 36 hours, whereas PARP cleavage was first detected at 24 hours and was completed prior to 72 hours. In contrast, the extent of internucleosomal DNA fragmentation and the release of DNA-histone complex to the cytoplasm (both were first detected at 24 hours) were cumulative over time up to the last time point of 96 hours. In summary, in paclitaxel-induced apoptosis, caspase activation was followed with a 12-hour lag time by PARP cleavage, internucleosomal DNA fragmentation, and release of DNA-histone complex to the cytoplasm. There was no detectable lag time between PARP cleavage and DNA fragmentation. The observation that only the detached cells but not the attached cells showed the full spectrum of apoptotic changes suggests that detachment is either a part of the initiation/execution phases of apoptosis and/or is required for their completion.
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Affiliation(s)
- J L Au
- College of Pharmacy, The Ohio State University, 500 West 12th Aveneue, Columbus, OH 43210, USA.
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21
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Kumar RR, Shafiulla M, Sridhar H. Association of tuberculosis with malignancy at KIMIO--an oncology centre. INDIAN J PATHOL MICR 1999; 42:339-43. [PMID: 10862295] [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: 02/16/2023] Open
Abstract
The association of tuberculosis and malignancy was studied at an oncology centre in Bangalore. The study period was from January 1981 to December 1995. A total of 8779 clinical material obtained from patients were screened for Mycobacterium tuberculosis infection. Out of which 675 were positive for acidfast bacilli, 385 from non malignant conditions and 290 from malignant conditions. Highest incidence is seen in Head and Neck cancer (42%) followed by Gastrointestinal cancer (14.1%), Lung cancer (13.8%), Haematological cancer (10.7%), Reproductive cancer (10.3%) and miscellaneous group (9%), Antibiogram of Mycobacterial cultures was done in 282 subjects. Resistance patterns to antitubercular drugs showed highest with Isonicotinic acid hydrochloride (INH) (17.7%), followed by para amino salicylic acid (PAS) (8.5%), Streptomycin (SM) (6.7%), Rifampicin (RIF) (4.6%) and Ethambutol (EM) (0.35%).
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Affiliation(s)
- R R Kumar
- Department of Microbiology, Kidwai Memorial Institute of Oncology, Bangalore
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22
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Tehrani HY, Petros JG, Kumar RR, Chu Q. Markers of severe appendicitis. Am Surg 1999; 65:453-5. [PMID: 10231216] [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: 02/12/2023]
Abstract
Appendicitis is a common surgical disease that often presents with vague, inconclusive symptoms. Despite the development of technologically advanced diagnostic modalities, perforation has usually occurred before the surgeon sees the patient. Morbidity, length of stay, and hospital costs associated with appendiceal perforation have not changed markedly in the past 50 years. To evaluate prognostic markers for severe appendicitis, we reviewed 18 years' worth of records of patients with appendicitis who were admitted to St. Elizabeth's Medical Center of Boston and found that the combination of history and physical examination has withstood the test of time. We found that advancing age, duration of symptoms for 36 or more hours, white blood cell count, shift left in white blood cell count, and fever were significantly related to severe appendicitis. An abnormal plain film was a marker if fever coexisted.
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Affiliation(s)
- H Y Tehrani
- Department of Surgery, St. Elizabeth's Medical Center of Boston, Massachusetts 02135, USA
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23
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Udayachander M, Meenakshi A, Sivakumar N, Kumar RR, Shankar SG, Dean CJ, Modjtahedi H. Characterization of monoclonal antibody CIBCNSH3 generated to the human EGF receptor. Hum Antibodies 1999; 9:149-54. [PMID: 10690627] [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: 04/14/2023]
Abstract
Monoclonal antibody CIBCNSH3 of IgG1 isotype has been generated against human epidermal growth factor receptor (EGFR) using MDA MB 468 breast carcinoma cell line as immunogen. Earlier studies have revealed that this MAb blocked growth factor-receptor interaction and thus inhibited cell proliferation and tumor growth. In the present paper, this MAb has been extensively characterized to evaluate its application in the study of human cancers. The results were compared with those obtained using a control MAb ICR 62 specific to EGFR. Competitive assay showed that this MAb bound to an epitope in the extracellular domain of the EGFR to which MAb ICR 62 also bound. This MAb immunoprecipitated the 170 kD glycoprotein. The specificity was further confirmed by the formation of a single discrete band in western blot analysis. By flow cytometric analysis this monoclonal antibody revealed high binding affinity with MDA MB 468 cells. By immunocytochemical assay, out of 35 breast tumors studied, 40% were found to exhibit strong cell membrane staining and in the case of 25 oral cancers studied, 56% were strong positive. High expression of EGFR was observed in MDA MB 468 cells and HN 5 cells. These studies clearly indicate that MAb CIBCNSH3 might prove useful to identify tumors with high level of expression of EGFR associated with poor prognosis.
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Affiliation(s)
- M Udayachander
- Department of Biochemical Oncology, Cancer Institute (W.I.A), Chennai, India
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24
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Kumar RR, Kumar BR, Shafiulla M, Lakshmaiah KC, Sridhar H. Fusarium solani infection in a patient with acute myelogenous leukemia--a case report. INDIAN J PATHOL MICR 1997; 40:555-7. [PMID: 9444872] [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: 02/05/2023] Open
Abstract
Multiple necrotizing skin lesions due to Fusarium solani in an elderly man with acute myelogenous leukemia is described.
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Affiliation(s)
- R R Kumar
- Department of Microbiology and Medical Oncology, Kidwai Memorial Institute of Oncology, Bangalore
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25
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Kumar RR, Jayshree RS, Sridhar H. Prevalence of HIV infection in voluntary blood donors and cancer patients. INDIAN J PATHOL MICR 1996; 39:187-9. [PMID: 8972146] [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: 02/03/2023] Open
Abstract
The HIV infection pattern amongst cancer patients and voluntary blood donors was studied at an oncology centre in South India. The study period was from May 1991 to March 1994. A total of 18,260 subjects were screened for HIV infection. Of which 14,266 were voluntary blood donors and 3994 were cancer patients. The HIV infection rate amongst voluntary blood donors and cancer patients was 0.042% (6/14266) and 0.4% (16/3994) giving a seropositivity rate of 0.42 and 4.0 per 1000 respectively.
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Affiliation(s)
- R R Kumar
- Department of Microbiology, Kidwai Memorial Institute of Oncology, Bangalore
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26
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Modlin IM, Kumar RR, Soroka CJ, Ahlman H, Nilsson O, Goldenring JR. Histamine as an intermediate growth factor in genesis of gastric ECLomas associated with hypergastrinemia in mastomys. Dig Dis Sci 1994; 39:1446-53. [PMID: 8026255 DOI: 10.1007/bf02088047] [Citation(s) in RCA: 9] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Profound and sustained inhibition of gastric acid secretion has been associated with development of carcinoid tumors of the fundic enterochromaffin-like (ECL) cells in rodents. While ECL cell hyperplasia has been recognized in humans, the development of carcinoid tumors is rare and often confined to patients under treatment for gastrinoma related to the multiple endocrine neoplasia type I (MEN1) syndrome. The Mastomys was utilized as a model for the rapid induction of ECLomas by insurmountable acid secretory blockade induced by the pharmacologically irreversible H2-receptor antagonist, loxtidine. Loxtidine-induced ECL cell hyperplasia and neoplasia were compared in the absence of presence of cyproheptadine (0.5 mg/kg), an H1-receptor antagonist. Loxtidine administration resulted in a significant increase in ECL cell hyperplasia and neoplasia as well as an increase in ECL cell number, mucosal thickness, plasma gastrin levels, and stomach weight. Cyproheptadine ameliorated loxtidine-induced ECL cell hyperplasia and neoplasia and significantly decreased loxtidine-stimulated increases in ECL cell number. Nevertheless, cyproheptadine failed to alter the loxtidine-induced increase in plasma gastrin, stomach weight or mucosal height. The results indicate that cyproheptadine, an H1-receptor antagonist, inhibits loxtidine-induced ECL cell hyperplasia independent of any effects on serum gastrin.
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Affiliation(s)
- I M Modlin
- Department of Surgery, Yale University School of Medicine, New Haven, Connecticut 06510
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27
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Abstract
Despite the promising potential of video-assisted thoracoscopic pleurectomy in the treatment of pneumothoraces, conventional surgical intervention by a thoracotomy and pleurodesis with ligation/stapling of bullae remains the main form of treatment in many hospitals. It is with this in mind that we present our experience of 250 patients who have undergone surgical pleurodesis for treatment of a persistent or recurrent spontaneous pneumothorax. Of these patients, 74 had undergone parietal pleurectomy (PP), 93 pleural abrasion (PA), 60 transaxillary apical pleurectomy (TAP), and 23 had undergone apical pleurectomy via a posterolateral or submammary thoracotomy (APT). In general, there were few complications and we could show no discernible difference in the rate of complications between the groups. Despite there being no significant difference in the median period of postoperative intercostal tube drainage, there was a significant difference between the groups in the number of patients with a postoperative hospital stay equal to or greater than seven days and a postoperative serosanguinous volume loss greater than 500 ml. Those patients that had undergone parietal pleurectomy tended to remain in hospital for a longer period (> or = 7 days) and to have a heavier serosanguinous volume loss (> 500 ml). There have been no recurrent cases in the PP and APT groups. Their respective median follow up periods are 62 (range 15-83) and 32 (range 15-54) months. The median follow up period in the PA group was 42 (range 13-69) months, one recurrence occurred after 7 months.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- U U Nkere
- Department of Thoracic Surgery, Harefield Hospital, Middlesex, England
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28
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Ahuja RC, Sinha N, Kumar RR, Saran RK. Effect of metoprolol and diltiazem on the total ischaemic burden in patients with chronic stable angina: a randomized controlled trial. Int J Cardiol 1993; 41:191-9. [PMID: 8288408 DOI: 10.1016/0167-5273(93)90115-w] [Citation(s) in RCA: 8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We conducted a randomised controlled trial to study the effects of metoprolol and diltiazem on the total ischaemic burden--sum of symptomatic and silent myocardial ischaemia, in 146 patients with stable angina pectoris. One-hundred thirty-four completed the study protocol. Sixty-eight patients received metoprolol (100 mg twice daily, n = 52, 50 mg twice daily, n = 16) while 66 received diltiazem (90 mg three times daily, n = 50, 60 mg three times daily, n = 16). The drugs were given for 4 weeks. The primary outcome variables were frequency and duration of total ischaemic burden, silent and symptomatic myocardial ischaemia. These were measured on 48 h of Holter monitoring. The reductions in duration and frequency of total ischaemic burden by metoprolol, 76% and 40%, respectively, were significantly higher than by diltiazem, 43% and 24%, respectively (P < 0.01 and P < 0.02). The frequency and duration of silent myocardial ischaemia, which constituted more than 80% of the total ischaemic burden in the two groups showed similar results. However, the reduction in frequency of symptomatic myocardial ischaemia only was significantly greater by metoprolol (63% than diltiazem (24%) as the difference in reduction of duration of symptomatic ischaemia was insignificant (85% vs. 75%; P > 0.05). Whether a greater reduction of total ischaemic burden by metoprolol as compared to diltiazem has any implications for prognosis in patients with chronic stable angina remains to be established.
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Affiliation(s)
- R C Ahuja
- Department of Medicine, King George Medical College, Lucknow, India
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29
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Modlin IM, Lewis JJ, Ahlman H, Bilchik AJ, Kumar RR. Management of unresectable malignant endocrine tumors of the pancreas. Surg Gynecol Obstet 1993; 176:507-518. [PMID: 8386860] [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: 05/22/2023]
Abstract
Malignant endocrine tumors of the pancreas are a heterogenous group of tumors with a multipotential secretory capacity. The lesions are generally slow growing with a relatively long life expectancy from the time of diagnosis. Death results from a combination of local and metastatic disease and the sequelae of excess hormone secretion. While potentially successful curative resections are rare, long term survival is frequently possible based on the rate of growth and the inhibition of the bioactive effects of the secretory products of the tumor. Regional control with palliative surgical debulking and transcatheter arterial embolization of hepatic metastases has an important role in terms of symptomatic relief and long term survival. These tumors respond frequently to chemotherapy. Combination chemotherapy is more effective than single agent treatment. Preliminary information suggests that leukocyte interferon is useful in treatment, but this agent still requires careful prospective evaluation. While current data do not support the use of octreotide for an antitumor effect, it is capable of producing prompt and substantial symptomatic relief with minimal side effects in a large proportion of patients with functional malignant endocrine tumors of the pancreas. Many advances have been made in the recognition, diagnosis and management of patients with malignant endocrine tumors of the pancreas. Additional basic cellular research is necessary to define the molecular and cell biologic factors of these tumor cells. Particular facets that require further understanding include their basic cytogenetic abnormality, regulation of peptide production and the role of peptides and other growth factors in endocrine, paracrine and autocrine regulatory relationships. The answers to these questions will hopefully promulgate the discovery of improved cytotoxic agents, better peptide pharmacotherapeutic agents and improve the overall management of patients with unresectable malignant endocrine tumors of the pancreas.
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Affiliation(s)
- I M Modlin
- Department of Surgery, Yale University School of Medicine, New Haven 06510
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30
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Reubi JC, Waser B, Horisberger U, Halter F, Soroka CJ, Kumar RR, Goldenring JR, Modlin IM. Identification of somatostatin and gastrin receptors on enterochromaffin-like cells from Mastomys gastric tumors. Endocrinology 1992; 131:166-72. [PMID: 1319317 DOI: 10.1210/endo.131.1.1319317] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [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: 12/26/2022]
Abstract
Histamine-secreting enterochromaffin-like (ECL) cells of the gastric fundus of the Mastomys can develop into solid ECL cell tumors, either spontaneously or after induction by acid inhibition. We used this tumor tissue to perform in vitro receptor autoradiography for somatostatin (SS), gastrin, and substance-P, using, respectively, [125I]Tyr3-octreotide, [125I]gastrin-17, and [125I]Bolton-Hunter-labeled substance-P as radioligands. A high density of SS receptors was found in the nontumor fundic mucosa, where gastrin receptors were only barely detectable. However, in the group of spontaneously developing ECL cell tumors, a high density of SS and gastrin receptors was observed, homogeneously distributed in the tumor tissue. In addition, the loxtidine-induced ECL cell tumors expressed a high density of SS and gastrin receptors. The receptors were specific for the respective peptide and of high affinity, with a dissociation constant (Kd) of 0.90 nM for SS receptor and 0.87 nM for gastrin receptors. No substance-P receptors were detected on the ECL cell tumors, although they were present in the muscle layers of the Mastomys gastric fundus. These results demonstrate that ECL-derived tumors express receptors for both SS and gastrin. This observation is consistent with the proposal that there is substantial regulation of the histamine-producing ECL cell by SS and gastrin. The presence of gastrin receptors is compatible with a role for gastrin as a trophic factor in ECL cell hyperplasia and neoplasia. The expression of SS receptors may be of diagnostic and therapeutic relevance in the regulation of ECL function and neoplastic transformation.
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Affiliation(s)
- J C Reubi
- Sandoz Research Institute, Berne, Switzerland
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31
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Abstract
Plasma gastrin has been reported to be elevated among patients with colorectal cancer. The objectives of the present study were to confirm this observation and, if confirmed, to shed light on the reason for the elevation. Presurgical and postsurgical fasting plasma gastrin levels were compared between 24 patients hospitalized for colorectal adenocarcinoma resection and 25 control patients hospitalized for other surgery. Elevated presurgical gastrin levels in the case group that fell after surgery would be consistent with production of gastrin by the tumor. High presurgical gastrin levels in the case group that did not change following surgery would be consistent with excess gastrin production by G cells. The mean presurgical gastrin levels were 21.9 +/- 3.7 pM (cases) and 45.1 +/- 18.0 pM (controls). The mean postsurgical gastrin levels were 20.5 +/- 3.9 pM (cases) and 43.4 +/- 14.6 pM (controls). These results do not provide support for the hypotheses that gastrin is elevated in colorectal cancer patients or that gastrin is secreted by colorectal tumors in sufficient quantities to be measurable in the plasma.
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Affiliation(s)
- R Yapp
- Department of Epidemiology and Public Health, Yale University School of Medicine, New Haven, Connecticut 06510
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32
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Abstract
A 24-year-old male presented with exertional dyspnoea of one year's duration. Echocardiography revealed an unruptured aneurysm of the left sinus of Valsalva distorting the mitral valvar apparatus and producing severe regurgitation in the absence of myocardial ischemia or infarction. We propose an alternate mechanism for the mitral regurgitation.
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Affiliation(s)
- R R Kumar
- Department of Cardiology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
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Kumar RR, Gokul BN, Chandramukhi A, Khanna N, Swamy HS. Shigella flexneri bacteraemia in post partum period. J Assoc Physicians India 1988; 36:390. [PMID: 3053638] [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: 01/03/2023]
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