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Gupta AD, Daruwalla MR, Pawar R, Sidhwa K, Hariharan P, Nadkarni A. Hb Yaizu: A rare beta-globin chain variant posing diagnostic dilemma in high-performance liquid chromatography. INDIAN J PATHOL MICR 2020; 63:663-665. [PMID: 33154334 DOI: 10.4103/ijpm.ijpm_851_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Amar Das Gupta
- Sections of Hematology, Coagulation and Flow Cytometry, SRL Limited, Mumbai, Maharashtra, India
| | | | - Ravikiran Pawar
- Sections of Hematology, Coagulation and Flow Cytometry, SRL Limited, Mumbai, Maharashtra, India
| | - Kainaz Sidhwa
- Sections of Hematology, Coagulation and Flow Cytometry, SRL Limited, Mumbai, Maharashtra, India
| | - Priya Hariharan
- Department of Hematogenetics, National Institute of Immunohematology, Mumbai, Maharashtra, India
| | - Anita Nadkarni
- Department of Hematogenetics, National Institute of Immunohematology, Mumbai, Maharashtra, India
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Sidhwa K, Daruwalla MR, Pawar R, Nadkarni A, Hariharan P, Mehta P, Gupta AD. Diagnostic challenges posed by a rare alpha globin chain variant Hb Fontainebleau in a pregnant female and its potential effects in her children in view of multiple globin gene defects in her husband. INDIAN J PATHOL MICR 2019; 62:323-325. [PMID: 30971568 DOI: 10.4103/ijpm.ijpm_218_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 11/04/2022] Open
Abstract
Alpha globin chain variants per se do not cause severe morbidity and mortality but can modify - usually ameliorate - the clinical manifestations of beta globin chain variants when co-inherited with the latter. They also pose challenges in interpretation of high-performance liquid chromatography histograms and require molecular analysis for proper characterization. Hemoglobin (Hb) Fontainebleau is a rare alpha globin chain variant [alpha 21(B2) Ala→Pro], of which only three families have been reported from India in the past. Here, we describe a case of Hb fontainebleau detected in heterozygous condition in a 19-year-old primigravida. Her husband was found to have a double heterozygous state for HbQ India and beta-thalassemia trait. This opens up the possibility of multiple combinations of hemoglobinopathies in the offspring.
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Affiliation(s)
- Kainaz Sidhwa
- Department of Hematology, Central Reference Laboratory, SRL Limited, Mumbai, Maharashtra, India
| | | | - Ravikiran Pawar
- Department of Hematology, Central Reference Laboratory, SRL Limited, Mumbai, Maharashtra, India
| | - Anita Nadkarni
- Department of Hematogenetics, National Institute of Immunohematology, Mumbai, Maharashtra, India
| | - Priya Hariharan
- Department of Hematogenetics, National Institute of Immunohematology, Mumbai, Maharashtra, India
| | - Pallavi Mehta
- Department of Hematogenetics, National Institute of Immunohematology, Mumbai, Maharashtra, India
| | - Amar Das Gupta
- Department of Hematology, Central Reference Laboratory, SRL Limited, Mumbai, Maharashtra, India
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Das Gupta A, Hariharan P, Daruwalla M, Sidhwa K, Pawar R, Nadkarni A. Hemoglobin Titusville [α2 Codon 94 G>A]: A Rare Alpha Globin Chain Variant Causing Low Oxygen Saturation. Indian J Hematol Blood Transfus 2019; 35:593-595. [PMID: 31388285 DOI: 10.1007/s12288-019-01110-z] [Citation(s) in RCA: 2] [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] [Received: 01/07/2019] [Accepted: 03/03/2019] [Indexed: 11/28/2022] Open
Affiliation(s)
- Amar Das Gupta
- Sections of Hematology, Coagulation and Flow Cytometry, SRL Diagnostics, Mumbai, India
| | - Priya Hariharan
- Division of Hematogenetics, National Institute of Immunohematology, Mumbai, India
| | - Manisha Daruwalla
- Sections of Hematology, Coagulation and Flow Cytometry, SRL Diagnostics, Mumbai, India
| | - Kainaz Sidhwa
- Sections of Hematology, Coagulation and Flow Cytometry, SRL Diagnostics, Mumbai, India
| | - Ravikiran Pawar
- Sections of Hematology, Coagulation and Flow Cytometry, SRL Diagnostics, Mumbai, India
| | - Anita Nadkarni
- Division of Hematogenetics, National Institute of Immunohematology, Mumbai, India
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Gupta AD, Nadkarni A, Mehta P, Goriwale M, Ramani M, Chaudhary P, Mehrotra V, Colah R. Phenotypic expression of HbO Indonesia in two Indian families and its interaction with sickle hemoglobin. INDIAN J PATHOL MICR 2017; 60:79-83. [PMID: 28195097 DOI: 10.4103/0377-4929.200030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Alpha globin chain variants are clinically significant since they directly influence the structure and function of the hemoglobin (Hb) molecules they constitute, either in combination with normal beta globin chains or with variant beta chains, thereby altering the morbidity and mortality associated with the resultant hemoglobinopathies. We describe here two unrelated families from Madhya Pradesh who had a nondeletional alpha-chain variant, HbO Indonesia (CD116 G → A). Members of one of the two families also had coinheritance of sickle hemoglobin (HbS). AIMS The aim was to study the phenotype of HbO Indonesia and its interaction with HbS. MATERIALS AND METHODS Hb electrophoresis, high-performance liquid chromatography (HPLC), covalent reverse dot blot hybridization, amplification refractory mutation system, multiplex polymerase chain reaction, and direct gene sequencing were used to identify and characterize the variant Hbs. RESULTS The abnormal Hb moved in HbS region in Hb electrophoresis at alkaline pH but gave an abnormal peak in HPLC with a retention time (RT) of 4.86-4.89 min. In two members of the family with coinheritance of HbS, it produced small additional abnormal Hb peaks (4.6% in heterozygous and 11.9% in homozygous member) in HPLC with a longer RT (5.15-5.17 min) possibly resulting from a combination of HbO Indonesia alpha chain with HbS beta chain. CONCLUSIONS It appears that depending on the zygosity of HbS, HbO Indonesia would subtract a variable amount of HbS beta chain from the total pool, thereby potentially reducing the clinical severity of HbS disease. HbO Indonesia per se does not cause anemia or alter the red cell indices.
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Affiliation(s)
- Amar Das Gupta
- Department of Hematology, SRL Limited, Mumbai, Maharashtra, India
| | - Anita Nadkarni
- Department of Hematogenetics, National Institute of Immunohaematology, Mumbai, Maharashtra, India
| | - Pallavi Mehta
- Department of Hematogenetics, National Institute of Immunohaematology, Mumbai, Maharashtra, India
| | - Manju Goriwale
- Department of Hematogenetics, National Institute of Immunohaematology, Mumbai, Maharashtra, India
| | - Manisha Ramani
- Department of Hematology, SRL Limited, Mumbai, Maharashtra, India
| | - Pradnya Chaudhary
- Department of Hematogenetics, National Institute of Immunohaematology, Mumbai, Maharashtra, India
| | - Vishal Mehrotra
- Department of Hematology, SRL Limited, Mumbai, Maharashtra, India
| | - Roshan Colah
- Department of Hematogenetics, National Institute of Immunohaematology, Mumbai, Maharashtra, India
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Dasgupta A, Rai S, Das Gupta A. Persistently elevated laboratory markers of thrombosis and fibrinolysis after clinical recovery in malaria points to residual and smouldering cellular damage. Indian J Hematol Blood Transfus 2011; 28:29-36. [PMID: 23449668 DOI: 10.1007/s12288-011-0106-y] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Accepted: 08/09/2011] [Indexed: 11/28/2022] Open
Abstract
Screening coagulation tests and assays for thrombosis and fibrinolysis were performed in 80 cases of malaria at presentation and during the course of the disease. Close correlation between the degree of thrombocytopenia (observed in >97% cases) and the presence hemorrhagic manifestations at presentation, and improvement in the platelet count in parallel with clinical recovery emphasised the role of platelets in the pathogenesis of coagulopathy in malaria. A potential selection bias resulting from inclusion of only patients admitted at a tertiary care hospital could explain the higher incidence (27.5%) of clinical bleeding observed in this study compared to that reported in the literature. Although a significant correlation between overt bleeding and abnormal PT/INR and APTT (observed in 20-37% cases) could not be demonstrated, a good correlation existed between normal screening coagulation tests and the absence of bleeding complications. Elevated D-Dimer and FDP levels in almost all cases (90%) of both types of malaria confirmed the high prevalence of disseminated intravascular coagulation and fibrinolysis. A correlation between rising D-Dimer levels and the incidence of bleeding was observed. Follow up studies in six cases with complications showed normalization of platelet counts and of screening coagulation assays with clinical recovery. D-Dimer and FDP levels however, remained elevated in most of these cases indicating the continuation of a smouldering coagulopathy even after full clinical recovery possibly due to the persistence of residual damage to the cells caused by the parasitic infection. Knowledge of this fact is important for avoiding unnecessary investigations and longer hospital stay in patients admitted with malaria.
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Affiliation(s)
- Anirban Dasgupta
- Department of Medicine, Mahatma Gandhi Mission's Hospital, Navi Mumbai, India ; 603 Janimal Towers, Sector 17, Vashi, 400703 Navi Mumbai, India
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Selvakumar G, Kundu S, Joshi P, Nazim S, Gupta AD, Gupta HS. Growth promotion of wheat seedlings by Exiguobacterium acetylicum 1P (MTCC 8707) a cold tolerant bacterial strain from the Uttarakhand Himalayas. Indian J Microbiol 2009; 50:50-6. [PMID: 23100807 DOI: 10.1007/s12088-009-0024-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2007] [Accepted: 03/31/2008] [Indexed: 10/20/2022] Open
Abstract
Exiguobacterium acetylicum strain 1P (MTCC 8707) is a gram-positive, rod-shaped, yellow pigmented bacterium isolated from soil on nutrient agar plates at 4°C. The identity of the bacterium was arrived on the basis of the biochemical characterization, BIOLOG sugar utilization pattern and sequencing of the 16S rRNA gene. It grew at temperatures ranging from 4 to 42°C, with temperature optima at 30°C. It expressed multiple plant growth promotion attributes such as phosphate solubilization, indole acetic acid (IAA), siderophore and hydrogen cyanide (HCN) production, differentially at suboptimal growth temperatures (15 and 4°C). At 15°C it solubilized phosphate (21.1 μg of P ml(-1) day(-1)), and produced IAA (14.9 μg ml(-1) day(-1)) in tryptophan amended media. Qualitative detection of siderophore production and HCN were possible at 15°C. At 4°C it retained all the plant growth promotion attributes. Seed bacterization with the isolate, positively influenced the growth and nutrient uptake parameters of wheat seedlings in glass house studies at suboptimal cold growing temperatures.
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Affiliation(s)
- G Selvakumar
- Vivekananda Institute of Hill Agriculture, Indian Council of Agricultural Research, Almora, 263 601 India
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Rasheeda MK, Sreenivasulu G, Swapna I, Raghuveer K, Wang DS, Thangaraj K, Gupta AD, Senthilkumaran B. Thiourea-induced alteration in the expression patterns of some steroidogenic enzymes in the air-breathing catfish Clarias gariepinus. Fish Physiol Biochem 2005; 31:275-279. [PMID: 20035470 DOI: 10.1007/s10695-006-0036-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Previous study from our laboratory on thiourea-induced thyroid hormone depletion in mature male catfish demonstrated that thyroid hormones play a significant role in testicular function. In the present study, we aimed to analyze the changes in the expression pattern of several steroidogenic enzyme genes after thyroid hormone depletion using semi quantitative RT-PCR in both adult male and female catfish. There was a marked decrease in the 11beta-hydroxylase expression in the testis and liver while no change was observed in case of kidney. A significant decrease in 11beta-hydroxysteroid dehydrogenase transcript level in testis, liver and kidney were observed in the thiourea treated males. The results obtained corroborated with our earlier findings of testicular regression after thyroid hormone depletion. In females, expression of aromatase transcript increased in experimental group compared to control. There was no considerable change observed in the transcript level of 3beta-hydroxysteroid dehydrogenase, P450 17alpha-hydroxylase/C17-20-lyase, and 20beta-hydroxysteroid dehydrogenase in both males and females. Thus, thyroid hormones might exert modulating effect on steroidogenic enzyme genes at the transcription level.
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Affiliation(s)
- M K Rasheeda
- Department of Animal Sciences, School of Life Sciences, University of Hyderabad, P.O. Central University, Gachibowli, Hyderabad, 500 046, India
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Jacob TN, Pandey JP, Raghuveer K, Sreenivasulu G, Gupta AD, Yoshikuni M, Jagota A, Senthilkumaran B. Thyroxine-induced alterations in the testis and seminal vesicles of air-breathing catfish, Clarias gariepinus. Fish Physiol Biochem 2005; 31:271-274. [PMID: 20035469 DOI: 10.1007/s10695-006-0035-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Effect of experimentally induced thyroxine overdose on the testis and seminal vesicles was studied in the air-breathing catfish, Clarias gariepinus during the preparatory and the pre-spawning phase. The present study revealed a marked reduction in testosterone level in serum, testis and seminal vesicles (SV). Histological examination showed a considerable reduction in the number of spermatozoa/spermatids in the seminiferous tubular lumen as well as depletion of fluid in the loculi of SV. SDS-PAGE analysis of SV fluid proteins demonstrated a significant decrease in the level of a ~27 kDa protein in thyroxine treated fishes. Evidences are presented here to indicate that thyroid hormone plays a role in regulating testis and SV function in catfish.
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Affiliation(s)
- T N Jacob
- Department of Animal Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, 500 046, India
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Affiliation(s)
- A D Gupta
- Division of Physical Medicine and Rehabilitation, ESI Hospital Manicktala, Kolkata, India.
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Gupta AD, Mandolkar M, Sethi M, Khodaiji S, Gupta T, Soman R, Chandiramani V. Spontaneously developing autoantibody to factor VIII in an elderly woman: diagnostic and therapeutic challenges. J Assoc Physicians India 2004; 52:72-3. [PMID: 15633726] [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: 05/01/2023]
Abstract
An elderly woman with a continuously bleeding small wound was investigated for the presence of antibodies to FVIII using activated partial time-based screening and confirmatory tests. A late acting coagulation factor inhibitor was detected. The same was characterised to be a low titre antibody against FVIII (5.2 Bethesda units). Cryoprecipitate infusions, corticosteroids and topical desmopressin were unsuccessful in controlling the bleeding. Addition of cyclophosphamide brought about stoppage of bleeding and disappearance of the autoantibody.
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Affiliation(s)
- A D Gupta
- Department of Medicine, PDHinduia National Hospital and Medical Research Centre (National Health and Education Society), Mumbai
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Shah SR, Gupta AD, Sharma A, Joshi A, Desai D, Abraham P. Acute superior mesenteric vein thrombosis associated with factor V 'Leiden' gene mutation. J Assoc Physicians India 2003; 51:611-3. [PMID: 15266932] [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: 04/30/2023]
Abstract
OBJECTIVES To study thrombophilia states in Indian patients with acute spontaneous superior mesenteric vein thrombosis (SMVT). METHODS Two men with this condition, a 56 year old and a 31 year old presenting with acute SMVT, demonstrated on CT scan, were subjected to a thrombophilia screen consisting of Protein C, S, antithrombin levels, lupus anticoagulant, anticardiolipin antibodies, fibrinogen levels, factor VIII levels, factor V 'Leiden' gene mutation, and paroxysmal nocturnal hematuria screen. RESULTS A thrombophilia screen showed factor V 'Leiden' gene mutation (heterozygous) in both cases. Additionally, the first patient had high fibrinogen levels and the second high factor VIII levels. Both patients are currently on long-term anticoagulation. CONCLUSION Factor V 'Leiden' gene mutation in association with other thrombophilic factors may predispose to spontaneous superior mesenteric vein thrombosis.
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Affiliation(s)
- S R Shah
- Section of GI Surgery, PD Hinduja National Hospital and Medical Research Centre, Mahim, Mumbai 400 016, India
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Abstract
Blood transferrin receptor (TR) level is largely determined by the quantum of erythropoiesis and by intracellular iron content of the cells of the erythroid lineage. Hence, a high serum TR level has been found to be useful in distinguishing iron deficiency anemia (IDA) from anemia of chronic disorders (ACD). In order to examine its potential role in the diagnosis of concomitant iron deficiency in ACD, we determined serum TR levels in 130 cases of ACD, in 25 cases of IDA, and in 40 normal adults. As expected, all patients of IDA had significantly higher serum TR levels compared to the normal subjects (4.2-19.2 microg/dL vs. 1.3-3.0 microg/dL) (P < 0.002). In 11/25 cases of IDA, the total iron-binding capacity (TIBC) was in the normal range although bone marrow iron store was absent and serum TR levels were high, thereby highlighting the superiority of TR level in the diagnosis of iron deficiency compared to TIBC. Although 54% (70/130) patients of ACD had normal or low serum TR levels (0.9-3.0 microg/dL) as expected, in 46% (60/130) of ACD patients, serum TR levels were high (3.2-11.0 microg/dL). Mean corpuscular volume, red cell distribution width, and transferrin saturation were significantly lower (P < 0.001) in the latter group of patients compared to the former, and these parameters resembled those in IDA patients. Also, serum iron was lower and TIBC was higher in this group of ACD patients compared to those with normal or low serum TR. All these features point to an "IDA-like" profile of ACD patients with high TR and support the possibility of co-existent iron deficiency in this subgroup of ACD patients. In light of these observations it would be prudent to treat ACD patients with high serum TR levels with iron replacement therapy.
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Affiliation(s)
- Amar Das Gupta
- Hematology Section, Department of Laboratory Medicine, P.D. Hinduja National Hospital and Medical Research Centre, Mumbai, India.
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Das Gupta A. Abrogation of macrocytosis in pernicious anemia by beta-thalassemia does not mask the diagnosis of vitamin B12 deficiency. Am J Hematol 2002; 71:61-2. [PMID: 12221681 DOI: 10.1002/ajh.10159] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
Carboxylic and dicarboxylic acids (glycolic, oxalic, malonic and succinic) have been extracted with tetrahydrofuran (THF) and H2O from large synthetic MgO crystals, crushed to a medium fine powder. The extracts were characterized by infrared spectroscopy and 1H-NMR. The THF extracts were derivatized with tert-butyldimethylsilyl (t-BDMS) for GC-MS analysis. A single crystal separated from the extract was used for an x-ray structure analysis, giving the monoclinic unit cell, space group P21/c with ao = 5.543 A, bo = 8.845 A, co = 5.086 A, and beta = 91.9 degrees, consistent with beta-succinic acid, HOOC(CH2)COOH. The amount of extracted acids is estimated to be of the order of 0.1 to 0.5 mg g-1 MgO. The MgO crystals from which these organic acids were extracted grew from the 2860 degrees C hot melt, saturated with CO/CO2 and H2O, thereby incorporating small amounts of the gaseous components to form a solid solution (ss) with MgO. Upon cooling, the ss becomes supersaturated, causing solute carbon and other solute species to segregate not only to the surface but also internally, to dislocations and subgrain boundaries. The organic acids extracted from the MgO crystals after crushing appear to derive from these segregated solutes that formed C-C, C-H and C-O bonds along dislocations and other defects in the MgO structure, leading to entities that can generically be described as (HxCyOz)n-. The processes underlying the formation of these precursors are fundamental in nature and expected to be operational in any minerals, preferentially those with dense structures, that crystallized in H2O-CO2-laden environments. This opens the possibility that common magmatic and metamorphic rocks when weathering at the surface of a tectonically active planet like Earth may be an important source of abiogenically formed complex organic compounds.
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Affiliation(s)
- F Freund
- SETI Institute, NASA Ames Research Center, Moffett Field, CA 94035-1000, USA.
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Ismail SM, Gupta AD. 20-Hydroxyecdysone mediated activation of larval haemolymph protein uptake by fat body cells of Corcyra cephalonica (Insecta). Biochem Int 1990; 22:261-8. [PMID: 2090095] [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: 12/30/2022]
Abstract
Evidence is presented here to show that 20-hydroxyecdysone is essential for the activation of the larval fat body for differential uptake of larval haemolymph proteins (LHPs). By using radiolabelled LHPs it is shown that the fat body cells of Corcyra cephalonica selectively incorporate LHPs during late-larval and prepupal development. Fluorographic analysis of the labelled fat body proteins from prepupal stage separated on sodium dodecyl-sulphate polyacrylamide gels suggests that the LHPs are sequestered without any degradation. Although, during the last larval instar the uptake of all the three LHPs (LHP 1, LHP 2 and LHP 3) by the fat body cells is very low, 20-hydroxyecdysone treatment of early, mid or late-last instars causes a significant increase in uptake of all the three LHPs. However, the response to hormone treatment was more pronounced in late-last instar when compared to early and mid-last instar.
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Affiliation(s)
- S M Ismail
- School of Life Sciences, University of Hyderabad, India
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Abstract
There is a wealth of nursing information available in multiple formats (journal articles, books, audiovisuals, computer software, pamphlets, dissertations, etc.). But the resources are not readily available to help the nurse identify needed materials quickly and easily. Current access to nursing journal articles and books is evaluated in detail; the need to collect and organize other types of nursing information is outlined. Better control of nursing information is a must if nurses are to take their place alongside other health care professionals.
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Cotner T, Gupta AD, Papayannopoulou T, Stamatoyannopoulos G. Characterization of a novel form of transferrin receptor preferentially expressed on normal erythroid progenitors and precursors. Blood 1989; 73:214-21. [PMID: 2462936] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
A panel of monoclonal antibodies (MoAbs) against cell surface proteins of early BFUe progeny was characterized. Five of these antibodies (Abs) reacted with normal erythroid, but not myeloid, bone marrow cells. Each of the five antibodies, typified by Ab 69.20, immunoprecipitated a dimeric complex of 185,000, which is composed of two identical disulfide-bonded subunits. This antigen had affinity for transferrin, and was essentially identical in biochemical characteristics to transferrin receptors precipitated with the well-characterized MoAbs OKT9 and 5E9. However, this form of transferrin receptor lacked both the OKT9 and 5E9 antigenic determinants and, moreover, the 69.20 epitope was absent from the conventional transferrin receptor, as defined by Abs OKT9 and 5E9. Modulation experiments demonstrated that both 69.20 and OKT9 modulated large, virtually independent populations of transferrin receptors. Both forms of transferrin receptor appeared to be derived from the product of a single gene, but the form defined by MoAb 69.20 apparently predominates in cells of the erythroid lineage and some transformed cell types that manifest a special requirement for iron. These data suggest that cells with a high iron requirement synthesize two forms of transferrin receptor, possibly by means of differential mRNA splicing or by posttranslational modification of the transferrin receptor.
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Affiliation(s)
- T Cotner
- Department of Pediatrics, University of Washington, Seattle
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Abstract
Eight cases each of erythroleukemia (AML-M6) and erythroblastic crisis of chronic granulocytic leukemia (CGLBC-E) were immunophenotyped with the help of a panel of lineage-associated monoclonal antibodies (McAbs). The latter included those reactive with erythroid progenitor (BFU-E and CFU-E) and erythroid precursors at different stages of maturation. In six of eight cases of AML-M6, erythroblasts revealed an immature phenotype, as evident from reactivity of the blast cells with McAbs directed against the earlier stages of erythroid maturation. One case had the phenotype of CFU-E, and in the remaining case of AML-M6 the erythroblasts showed a "mature" surface antigenic profile. This immunophenotypic spectrum was unrelated to the morphologic maturity of the erythroblasts. In two cases of CGLBC-E, an early erythroblastic phenotype was observed, while in as many cases a "mature" phenotype was present. Four of eight cases, however, revealed a mixed, erythroid plus myeloid phenotype. In one of the four cases, two separate blast populations, which represented erythroblasts and myeloblasts, could be identified. In the remaining three cases the blasts were morphologically homogeneous and undifferentiated. High incidence of HLA-DR positivity in the latter three cases suggests the primitive nature of blasts cells and their closeness to the putative "bipotent" myeloid stem cell. Our study has shown phenotypic heterogeneity of blast cells in AML-M6 and CGLBC-E.
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Affiliation(s)
- A D Gupta
- Division of Laboratory Medicine, Tata Memorial Hospital, Bombay, India
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Gupta AD, Samoszuk MK, Papayannopoulou T, Stamatoyannopoulos G. SFL 23.6: a monoclonal antibody reactive with CFU-E, erythroblasts, and erythrocytes. Blood 1985; 66:522-6. [PMID: 4027378] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
A cytotoxic (IgG2b) monoclonal antibody (McAb) for a novel erythroid differentiation antigen was generated by hyperimmunizing young mice with mononuclear cells obtained from livers of 20- to 22-week-old fetuses. This McAb, designated SFL 23.6, shows an extremely well-defined reactivity with the cells of the erythroid lineage at all stages of maturation as evident from the labeling of morphologically identifiable erythroid precursors and of erythrocytes present in peripheral blood, bone marrow, and fetal liver, and from its reactivity with culture-derived erythroblasts. The nonerythroid cells present in these and other tissue preparations were not labeled by SFL 23.6. The erythroid lineage specificity of McAb SFL 23.6 was confirmed by a cell-sorting experiment in which 97% of the cells in the fluorescent fraction sorted from SFL 23.6-treated bone marrow cells were erythroid precursors at various stages of maturation. Complement-mediated cytotoxicity and progenitor cell-sorting experiments showed that most (greater than 90%) of the late erythroid progenitors (CFU-E) and only a small proportion of the early erythroid progenitors (BFU-E) express the antigenic determinant identified by SFL 23.6. The myeloid progenitors (CFU-GM) and multilineage progenitors (CFU-GEMM) were negative for the SFL 23.6 antigenic determinant. The antigen recognized by SFL 23.6 has not been determined as yet. Because of the pattern of its reactivity and its dependence on sialic acid residues, the possibility of its relationship to glycophoria A was entertained. However, previous work using antiglycophorin McAbs (R-10) has shown that this determinant is not expressed in CFU-E. Therefore, among the erythroid lineage-specific McAbs described thus far, SFL 23.6 is unique in its reactivity with CFU-E and the mature erythron. Reagents with such specificity may be useful in studies of erythroid differentiation and commitment.
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Fishel CC, Graham KE, Greer DM, Gupta AD, Lockwood DK, Prime EE. CINAHL list of subject headings: a nursing thesaurus revised. Bull Med Libr Assoc 1985; 73:153-9. [PMID: 3995203 PMCID: PMC227572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The rationale and methods for revising the thesaurus of one of the major health sciences indexing tools are discussed. Computer production of the Cumulative Index to Nursing & Allied Health Literature and the possibility of online access mandated a revision of the list of subject headings. CINAHL has maintained a policy of responding to user needs and to changes in the nursing and allied health literature, and user input was encouraged during revision of the thesaurus. The methods of structural revision are described, and major changes in the thesaurus are detailed. Modification of the thesaurus is expected to have a far-reaching impact on the retrieval of information in nursing and allied health. Nursing and Allied Health (CINAHL) is now available online through DIALOG (file 218) and BRS (access code NAHL).
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Gupta AD, Barbhaya SA, Anita PK, Shetty PA. Clinical & prognostic significance of blast cell morphology & cytochemistry in acute non-myelogenous leukaemia. Indian J Med Res 1983; 78:828-35. [PMID: 6674172] [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: 01/21/2023] Open
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Gupta AD, Vakil RF, Aga R, Shetty PA. Reversal to fetal erythropoiesis in acute myelogenous leukemia. Indian J Cancer 1983; 20:166-8. [PMID: 6197353] [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: 01/18/2023]
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Abstract
The presence of significant methemoglobinemia in a large number (79%) of cases of leukemia prompted us to look into the evidence for oxidative injury to the other red cell constituents, e.g. the cell membrane. Forty-five per cent of cases showed increased malonyldialdehyde (MDA) levels indicating in vivo peroxidation of membrane lipids in leukemia patients. Red cell superoxide dismutase (SOD) activity was reduced in 25% of cases while plasma alpha-tocopherol levels were markedly low in 68% of patients. The presence of an inverse correlation between MDA levels and SOD and tocopherol levels in a large number of cases suggested that the red cells in leukemia lack the ability to counter increased oxidative stress. Low hemoglobin content of the red cells in these patients seemed to contribute to the oxidative injury to the membrane by rendering the latter more accessible to the oxidants. While methemoglobinemia may enhance tissue hypoxia, membrane lipid peroxidation could explain the shortened erythrocyte life-span and anemia in leukemia.
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Hales BJ, Gupta AD. Orientation of the bacteriochlorophyll triplet and the primary ubiquinone acceptor of Rhodospirillum rubrum in membrane multilayers determined by ESR spectroscopy (I). Biochim Biophys Acta 1979; 548:276-86. [PMID: 228709 DOI: 10.1016/0005-2728(79)90135-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Chromatophores from Rhodospirillum rubrum were oriented as multilayers on quartz slides under reducing conditions. Irradiation of these multilayers in the resonance cavity of an ESR spectrometer at 6 K yielded the spectrum of the bacteriochlorophyll dimer triplet. The relative intesities of the main six lines of the triplet were dependent on the angle subtended by the direction of the external magnetic field with plane of the multilayers. The angular dependence of the intensities of these transitions can best be interpreted in terms of one of the principal axes of the triplet lying along the plane of the membrane while the other two axes are titled 10--20 degrees away from the parallel to and normal to the membrane directions. If we assume the porphyrin planes of the dimer to be parallel and the largest splitting of the triplet transitions to correspond to those transitions in a direction normal to this plane, then these data imply that the dimer planes are nearly perpendicular to the membrane plane. Purified iron-depleted phototrap complexes were similarly oriented in reconstituted phosphatidylcholine multilayers and the angular dependence of the light-induced spectrum recorded at room temperature. A computer analysis of this angular dependence suggests that the plane of the primary ubiquinone acceptor molecule is parallel to the plane of the membrane and therefore perpendicular to the donor.
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Abstract
Chronic administration of ethanol failed to a stimulate the hepatic rate of cholesterol synthesis in meal-fed rats. In contrast, chronic ethanol feeding caused a 50% inhibition in the rate of incorporation of [4-14C] cholesterol to bile acids in the bile-duct cannulated rats. It is, therefore, suggested that the decreased rate of cholesterol degradation to bile acids may play an important role in ethanol-induced accumulation of cholesterol in liver.
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Gupta AD. Post partum programme--its objectives and implementation. J Indian Med Assoc 1975; 64:297-300. [PMID: 1184976] [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: 12/26/2022]
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Das NC, Gupta AD. Fertility in India--trends, differentials, implications. Indian J Public Health 1974; 18:138-48. [PMID: 4466804] [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: 01/10/2023] Open
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Gupta AD. Human genetics and the practitioner. J Indian Med Assoc 1970; 54:203-4. [PMID: 5446077] [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: 01/15/2023]
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Majumdar M, Gupta AD. Marriage trends and their demographic implications. Sankhya Ser B 1969; 31:491-500. [PMID: 12278391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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Gupta AD, Basu DP, Bagchi AK. Subarachnoid haemorrhage. Indian Heart J 1969; 21:48-54. [PMID: 5783198] [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: 01/16/2023] Open
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