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Andrews DJ, Eddy TL, Hollenback KS, Sreekumar S, Loose DC, Pennetti CA, Polmateer TL, Haug JC, Oliver-Clark LI, Williams JY, Manasco MC, Smith S, Lambert JH. Enterprise risk management for automation in correctional facilities with pandemic and other stressors. Risk Anal 2023; 43:820-837. [PMID: 36114602 DOI: 10.1111/risa.14004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Real-time tracking of tool and equipment inventories is a critical function of many organizations and sectors. For prisons and correctional facilities, tracking and monitoring of assets such as cookware, hardware, keys, janitorial equipment, vocational/technical specialty tools, etc., is essential for safety, security, trust, efficiency, education, etc. The performance of automated systems for this purpose can be diminished by a variety of emergent and future sociotechnical factors alone and in combination. This article introduces a methodology for contractor evaluation and selection in acquisition of innovative asset management systems, with an emphasis on evolving system requirements under uncertainty. The methodology features a scenario-based preferences analysis of emergent and future conditions that are disruptive to the performance of the asset-control system. The conditions are across technologies, operating environments, regulations, workforce behaviors, offender behaviors, prices and markets, organizations, cyber threats, etc. The methodology addresses the influence and interaction of the conditions to disrupt system priorities. Examples include: (i) infectious disease disrupting priorities among requirements and (ii) radio-frequency identification (RFID) and wireless-technology innovations disrupting priorities among stakeholders. The combinations of conditions that most and least matter for the system acquisition are characterized. The methodology constitutes a risk register for monitoring sources of risk to project performance, schedule, and cost throughout the system lifecycle. The results will be of interest to both practitioners and scholars engaged in systems acquisition as the pandemic interacts with other factors to affect risk, uncertainty, and resilience of organizational missions and operations.
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Affiliation(s)
- Daniel J Andrews
- School of Engineering Systems and Environment, University of Virginia, Charlottesville, Virginia, USA
| | - Timothy L Eddy
- School of Engineering Systems and Environment, University of Virginia, Charlottesville, Virginia, USA
| | - Kelsey S Hollenback
- School of Engineering Systems and Environment, University of Virginia, Charlottesville, Virginia, USA
| | - Shravan Sreekumar
- School of Engineering Systems and Environment, University of Virginia, Charlottesville, Virginia, USA
| | - Davis C Loose
- School of Engineering Systems and Environment, University of Virginia, Charlottesville, Virginia, USA
| | - Cody A Pennetti
- School of Engineering Systems and Environment, University of Virginia, Charlottesville, Virginia, USA
| | - Thomas L Polmateer
- School of Engineering Systems and Environment, University of Virginia, Charlottesville, Virginia, USA
| | | | - Lessie I Oliver-Clark
- Department of Applied Engineering Technology, Virginia State University, Petersburg, Virginia, USA
| | - Joi Y Williams
- Department of Applied Engineering Technology, Virginia State University, Petersburg, Virginia, USA
| | - Mark C Manasco
- Commonwealth Center for Advanced Logistics Systems, Richmond, Virginia, USA
| | - Steven Smith
- Virginia Department of Corrections, Richmond, Virginia, USA
| | - James H Lambert
- School of Engineering Systems and Environment, University of Virginia, Charlottesville, Virginia, USA
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Lo W, Huynh T, Strong L, Klaas A, Sreekumar S, Schwarz J, Robinson C, Rogers B, Bergom C. avb6 Integrin-Targeted PET Imaging to Monitor Radiation-Induced Pulmonary Fibrosis In Vivo. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.2134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Bava NP, Sreekumar S, Mathew G, Sushan A, Sheeja AL, Parvathy P. Strategies for COVID-19 control among migrant labourers in a developing country setting: Pathanamthitta model from Kerala. J Family Med Prim Care 2021; 10:2342-2347. [PMID: 34322435 PMCID: PMC8284236 DOI: 10.4103/jfmpc.jfmpc_2357_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/16/2021] [Accepted: 03/17/2021] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND The ongoing pandemic of Covid-19 is a public health emergency with serious implications world-wide including India. Vulnerable population like migrants are often left out of epidemic preparedness planning and reaching out these marginalized population is a challenge. OBJECTIVE To describe different strategies implemented for control and prevention of Covid-19 among migrants in Pathanamthitta. RESULTS Strategies for Covid-19 control among migrant labourers were planned and implemented with intersectoral coordination and community participation. Line listing and risk stratification, mobilisation of community volunteers, contactless active symptomatic surveillance using technology, IEC activities for awareness generation in multiple languages, sample collection, testing and distribution of personal protective equipment's were initially implemented. Setting up of a call centre facility assisted with M health technology exclusively for addressing concerns of migrants was first and one of its kind in the country. In addition to that special measures were taken to improve adherence and wellbeing of migrants which included addressing medical needs of migrants including psychological needs, ensuring food security, migrant hostels for the providing shelter, basic health care, isolation facilities and arranging transportation facilities for more than 10,000 stranded migrants. The success of these strategies was evident from the fact that not even a single migrant labourer was tested positive in the district during this period. CONCLUSION Pathanamthitta district being in a resource constraint setting showed a very effective model by implementing technology assisted strategies tailored to the needs of population.The success of these highly effective and replicable strategy underlines the need to incorporate principles of primary health care in crisis management.
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Affiliation(s)
- Nooh P. Bava
- Hon. District Collector, Pathanamthitta District, Kerala, India
| | - S Sreekumar
- FHC Vadasserikara, Pathanamthitta District, Kerala, India
| | - Geethu Mathew
- Department of Community Medicine, Believers Church Medical College (BCMCH), Thiruvalla, Kerala, India
| | - Abey Sushan
- District Programme Manager, National Health Mission, Pathanamthitta District, Pathanamthitta District, Kerala, India
| | - A. L Sheeja
- District Medical Officer, Pathanamthitta District, Kerala, India
| | - P Parvathy
- FHC Thannithode, Pathanamthitta District, Kerala, India
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Lekshmi RK, Biju CK, Sreekumar S. A Potential Lead from Acacia nilotica (L.) Delile Against Hepatitis C virus - An In silico Approach. Indian J Pharm Sci 2021. [DOI: 10.36468/pharmaceutical-sciences.793] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Nisha NC, Sreekumar S, Evans DA, Biju CK. In vitro and In silico Validation of Anti-Cobra Venom Activity and Identification of Lead Molecules in Aegle marmelos (L.) Correa. CURR SCI INDIA 2018. [DOI: 10.18520/cs/v114/i06/1214-1221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Jankowitz RC, Sreekumar S, Levine KM, Meier C, Sikora MJ, Basudan A, Boone D, Dabbs DJ, Jacobsen B, Lee AV, Oesterreich S. Abstract P4-05-02: Differential regulation of ER protein-turnover in invasive lobular carcinoma cells. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p4-05-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Invasive lobular breast carcinoma (ILC) accounts for 10-15% of breast cancers diagnosed annually. ILCs are more likely to be positive (90-95%) for ER compared to IDC (60-70%), and there is some evidence that endocrine treatment response might be different in patients with IDC vs ILC. We asked the question whether there were differences in ER protein steady state levels, and/or turn-over rates.
Methods: We utilized TCGA dataset to compare ESR1 mRNA and ER protein levels between ER+ ILC (n=137) and IDC (n=554). ER H-scores and ESR1 mRNA levels were analyzed from patients with ER+ ILC (n=143) and IDC (n=877) seen at UPMC Magee Women's Hospital. Correlation analysis with Pearson's (r) and Spearman's rank order coefficient (ρ) was used to study the relationship between mRNA and protein levels. Basal and ligand induced ESR1 mRNA and ER protein expression and turn-over were determined in a panel of estrogen responsive ER+ IDC (MCF-7, T47D and ZR75-1) and ILC (BCK-4, MDA-MB-134 VI (MM134), SUM44PE) cell lines to identify potential mechanisms that can contribute to differential expression of ERα protein.
Results: TCGA database analysis revealed significantly lower ESR1 mRNA and ER protein levels in ER+ ILC compared to IDC tumors. Analysis of data from our Magee hospital showed similar ER IHC H-scores for ER+ ILCs and IDCs despite having significantly lower ESR1 mRNA in ILC. In both the study sets, the correlation between ER mRNA and protein levels were found to be significantly weaker in ER+ ILC than IDC suggesting subtype specific increased synthesis and/or stability of the receptor protein. ILC cell lines MM134 and SUM44 have increased levels of ER protein compared to IDC cell lines. Estradiol decreased the levels and half-life of ER protein in all IDC cell lines tested. In MM134 and SUM44PE ILC cell lines, estradiol decreased the rate of degradation of ER and increased its half-life. In MM134 cells, treatment with estradiol induced a dose- and time-dependent increase in ER, which is associated with a sustained level of elevated phosphorylation at Ser 118.
Conclusions and ongoing/future studies: The estradiol-induced ER protein stability in a subset of ILC cell lines suggest a possible mechanism leading to weaker ER mRNA-protein correlation in ILC tumors. We currently do not know if and how this observation might be linked to antiestrogen response in ILC. We have recently initiated a TBCRC-supported trial in which we will compare the effect of different endocrine therapies in patients with ILC. Access to pre and post therapy samples will provide the opportunity to study ER levels and its downstream signaling as a function of antiestrogen treatment.
Citation Format: Jankowitz RC, Sreekumar S, Levine KM, Meier C, Sikora MJ, Basudan A, Boone D, Dabbs DJ, Jacobsen B, Lee AV, Oesterreich S. Differential regulation of ER protein-turnover in invasive lobular carcinoma cells [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P4-05-02.
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Affiliation(s)
- RC Jankowitz
- Women's Cancer Research Center, University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; Techniche University, Dresden, Germany; Anschutz Medical Campus, University of Colorado, Denver, CO; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - S Sreekumar
- Women's Cancer Research Center, University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; Techniche University, Dresden, Germany; Anschutz Medical Campus, University of Colorado, Denver, CO; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - KM Levine
- Women's Cancer Research Center, University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; Techniche University, Dresden, Germany; Anschutz Medical Campus, University of Colorado, Denver, CO; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - C Meier
- Women's Cancer Research Center, University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; Techniche University, Dresden, Germany; Anschutz Medical Campus, University of Colorado, Denver, CO; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - MJ Sikora
- Women's Cancer Research Center, University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; Techniche University, Dresden, Germany; Anschutz Medical Campus, University of Colorado, Denver, CO; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - A Basudan
- Women's Cancer Research Center, University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; Techniche University, Dresden, Germany; Anschutz Medical Campus, University of Colorado, Denver, CO; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - D Boone
- Women's Cancer Research Center, University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; Techniche University, Dresden, Germany; Anschutz Medical Campus, University of Colorado, Denver, CO; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - DJ Dabbs
- Women's Cancer Research Center, University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; Techniche University, Dresden, Germany; Anschutz Medical Campus, University of Colorado, Denver, CO; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - B Jacobsen
- Women's Cancer Research Center, University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; Techniche University, Dresden, Germany; Anschutz Medical Campus, University of Colorado, Denver, CO; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - AV Lee
- Women's Cancer Research Center, University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; Techniche University, Dresden, Germany; Anschutz Medical Campus, University of Colorado, Denver, CO; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - S Oesterreich
- Women's Cancer Research Center, University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; Techniche University, Dresden, Germany; Anschutz Medical Campus, University of Colorado, Denver, CO; University of Pittsburgh School of Medicine, Pittsburgh, PA
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Rao AR, Bhattacharya D, Bhalerao VB, Vadawale SV, Sreekumar S. Cadmium-Zinc-Telluride Imager On-Board Astrosat:A Multi-Faceted Hard X-Ray Instrument. CURR SCI INDIA 2017. [DOI: 10.18520/cs/v113/i04/595-598] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Sreekumar S, Levine K, Sikora MJ, Boone D, Dabbs DJ, Lee AV, Jankowitz RC, Oesterreich S. Abstract P3-04-02: Differential turnover of estrogen receptor alpha in invasive lobular carcinoma. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p3-04-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Invasive lobular carcinoma (ILC) accounts for 10-15% of invasive breast cancers diagnosed annually. There is increasing evidence that endocrine treatment response might differ between Invasive Ductal Carcinoma (IDC) and ILC, and that patients with ILC have worse long-term survival when other prognostic factors are taken into account. One such factor is ER status, which is more likely to be positive in ILC (90-95%) compared to IDC (60-70%). There are few studies that have directly compared mRNA and protein levels between ER+ ILC and ER+ IDC.
Hypothesis: Differences in ER protein steady state levels, and/or turn-over rates contribute to differences in endocrine treatment response between patients with ILC vs IDC.
Methods: We utilized publicly available TCGA data to compare ER mRNA and protein levels between ER+ ILC (n=184) and IDC (n=534). Correlation analysis with Spearman's rank order coefficient (ρ) was used to study the relationship between mRNA and protein levels. METABRIC data were analyzed to compare ER mRNA levels between ER+ ILC (n=130) and IDC (n=1152). ER H-scores and mRNA levels were also analyzed from patients with ER+ ILC (n=180) and IDC (n=1183) seen at our local UPMC Magee Womens Hospital. Finally, ER mRNA and total protein levels, and RNA and protein turn-over rates were determined in 2 IDC and 2 ILC breast cancer cell lines, using qRT-PCR and immunoblots analysis.
Results: Analysis of ESR1 gene expression in the TCGA database revealed significantly lower levels of ER mRNA (Mann-Whitney, p<.0005) in ER+ ILC compared to IDC, whereas ER protein levels were similar in the two histological subtypes. The correlation between ER mRNA and protein levels is weaker in ER+ ILC (ρ=0.60) compared to ER+ IDC (ρ=0.69) tumors, though not statistically significant. The weaker correlation between mRNA and protein expression in ILC is more clear when analyzing all 130 RNA and protein pairs with available RRPA data, (ILC median ρ=0.28; IDC median ρ=0.34, p<.0005). In the METABRIC dataset, ESR1 mRNA levels were also found to be lower in ER+ ILC tumor samples compared to IDCs (Mann-Whitney, p<0.005). In concordance with these observations, the study of patients seen at our local hospital showed similar ER IHC H-scores for ER+ ILCs (H-score = 244) and IDCs (H Score = 248), despite there being significantly lower ESR1 mRNA in ILC (p<0.005). Finally, our in vitro data showed that rate of estrogen-mediated turn-over of ER protein was significantly lower in the ILC cell lines compared to the IDC cell lines, which might explain the lack of lower ER protein levels despite lower ER mRNA levels. We are currently confirming these findings in additional cell lines, and deciphering the mechanisms through the study of ER ubiquitin-modification and proteasome machinery comparing ILC and IDC.
Conclusion: We have provided functional and in silico data that collectively suggest altered ER protein turn-over in ILC compared to IDC. We are currently testing if and how this affects sensitivity of ILC cells to SERDs, and underlying mechanisms.
Citation Format: Sreekumar S, Levine K, Sikora MJ, Boone D, Dabbs DJ, Lee AV, Jankowitz RC, Oesterreich S. Differential turnover of estrogen receptor alpha in invasive lobular carcinoma [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P3-04-02.
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Affiliation(s)
- S Sreekumar
- Womens Cancer Research Center, University of Pittsburgh Cancer Institute, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - K Levine
- Womens Cancer Research Center, University of Pittsburgh Cancer Institute, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - MJ Sikora
- Womens Cancer Research Center, University of Pittsburgh Cancer Institute, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - D Boone
- Womens Cancer Research Center, University of Pittsburgh Cancer Institute, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - DJ Dabbs
- Womens Cancer Research Center, University of Pittsburgh Cancer Institute, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - AV Lee
- Womens Cancer Research Center, University of Pittsburgh Cancer Institute, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - RC Jankowitz
- Womens Cancer Research Center, University of Pittsburgh Cancer Institute, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - S Oesterreich
- Womens Cancer Research Center, University of Pittsburgh Cancer Institute, Pittsburgh, PA; University of Pittsburgh, Pittsburgh, PA; University of Pittsburgh School of Medicine, Pittsburgh, PA
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Thomas S, Sindhu CB, Sreekumar S, Sasidharan PK. AIDS associated Kaposi's sarcoma. J Assoc Physicians India 2011; 59:387-389. [PMID: 21751599] [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: 05/31/2023]
Abstract
Epidemic Kaposi's sarcoma (KS) is the most common malignant neoplasm occuring in HIV patients. Although the prevalence of HIV infection is high in Asian countries, KS is rarely reported. We report a case of fatal KS involving the skin and mucous membranes in a homosexual male.
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Affiliation(s)
- Sumi Thomas
- Department of Dermatology and Venereology, Medical College, Calicut
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Ashwath SK, Sreekumar S, Toms JT, Dandin SB, Kamble CK. Identification of RAPD markers linked to digestive amylase genes using near isogenic lines of the silkworm, Bombyx mori. J Insect Sci 2010; 10:84. [PMID: 20673069 PMCID: PMC3383425 DOI: 10.1673/031.010.8401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2008] [Accepted: 11/10/2009] [Indexed: 05/29/2023]
Abstract
Digestive amylase has been identified as a useful marker for breeding in the silkwrom, Bombyx mori L (Lepidoptera: Bombycidae), due to its wide genetic divergence, its role in better digestibility and robustness. The low yielding indigenous B. mori breeds of tropics like India are characterized by high activity amylase genes controlled by Amy d(iv) or d(v) alleles, while the high yielding breeds of temperate origin are endowed with 'null' type (Amy d(n)) with low activity. For improving the digestibility and survival of temperate breeds of Japanese origin, Near Isogenic Lines (NILs) were developed introgressing the Amy d(iv) and d(v) alleles from the Donor Parents (DPs) into the genetic background of the Recurrent Parents (RPs) with 'null' type of amylase, which showed significant improvement in viability of the NILs. With the objective to know whether the amylase gene itself may confer higher survival by improving digestibility or some other closely linked genes flanking the amylase locus is responsible for better viability of the NILs, RAPD profiles among six B. mori breeds comprising of the DPs, RPs, and NILs developed through introgression of Amy d(iv) or d(v) alleles were analysed using 27 sets of RAPD primers. Out of the 27 primers, six (OPA01, OPA06, OPA09, OPA15, OPAH03, and OPAH05) showed RAPD products linked to the amylase genes of the DPs introgressed in the NILs, which were absent in their respective RPs. Three amplicons of 1584 bp, 1904 bp, and 1232 bp were specific to Amy d(iv) allele and one amplified product of 1776 bp was found to be linked with the Amy d(v) allele. Interestingly, two PCR products of 2628 and 1375 bp were associated with both Amy d(iv) and d(v) alleles. The results are discussed in light of further characterization of these amplified products leading to identification of DNA sequences that may be responsible for better digestibility and higher survival in B. mori.
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Affiliation(s)
- S K Ashwath
- Genetics and Molecular Biology Laboratory, Central Sericultural Research and Training Institute, Srirampura, Manandavadi Road, MYSORE, Karnataka, India.
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Sandeep P, Jayakrishnan C, Sadanan S, Sreekumar S, Thulasidharan NK. Cerebrotendinous xanthomatosis: a treatable neurodegenerative disease. J Assoc Physicians India 2009; 57:716-717. [PMID: 20329433] [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
Cerebrotendinous xanthomatosis is one of the rare forms of treatable hereditary neurodegenerative disorders. It is due to a defect in hydroxylation of cholesterol side chain that impairs oxidative cleavage of cholesterol leading to excess accumulation of cholesterol. Here we present such a case which presented to us with recurrent generalized tonic clonic seizures. He is under treatment for the same and has not neurologically deteriorated since then.
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Affiliation(s)
- P Sandeep
- Department of Medicine, Govt. Medical College, Calicut
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Thachil EJ, Sudheesh, Sreekumar S, Paul BJ. What is your diagnosis? Indian Journal of Rheumatology 2008. [DOI: 10.1016/s0973-3698(10)60117-3] [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: 11/30/2022] Open
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Heyl DL, Sethi B, Rogalski A, Bowen CE, Lawrence M, Beitler L, Harning E, Hancer A, Sreekumar S, Fernandes S. Variation of pKa in the N-terminal tyrosine side chain in octapeptide analogs of tendamistat influences alpha-amylase inhibition. Protein Pept Lett 2007; 14:497-501. [PMID: 17584177 DOI: 10.2174/092986607780782867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Peptide analogs of tendamistat were synthesized and analyzed for alpha-amylase inhibitory activity. The pK(a) of the N-terminal tyrosine was modified by incorporation of ring-substituted analogs, which alters hydrogen bonding capacity. K(i) values ranging from 70 to 524 microM generally increased with increasing pK(a), indicating a necessity for H-bond donor ability.
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Affiliation(s)
- D L Heyl
- Department of Chemistry, Eastern Michigan University, Ypsilanti, MI 48197, USA.
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Rekha RY, Sreekumar S. Morphology of the integumentary structures in the nymph of lace bug, Stephanitis typica (Hemiptera: Tingidae). J Electron Microsc (Tokyo) 2004; 53:57-61. [PMID: 15077900 DOI: 10.1093/jmicro/53.1.57] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The nymphs of the lace bug Stephanitis typica possess unsegmented, slender, integumentary processes. They are arranged chiefly in three rows on the mid-dorsal and lateral sides. The surface ultrastructure of the integumentary process reveals three types of sensilla, namely, companiform sensilla at the tip of the integumentary process having a probable proprioceptive function, oar-shaped wind and gravity sensilla, and pegs supposed to be hygroscopic.
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Affiliation(s)
- R Y Rekha
- CSIR-JRF, Research Division, Department of Zoology, Mar Ivanios College, Trivandrum 695015, Kerala, India.
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Harshini S, Reshmi V, Sreekumar S. A brain peptide stimulates release of amylase from the midgut tissue of larvae of Opisina arenosella Walk. (Lepidoptera: Cryptophasidae). Neuropeptides 2003; 37:133-9. [PMID: 12860110 DOI: 10.1016/s0143-4179(03)00025-8] [Citation(s) in RCA: 5] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Brain extracts from 3 to 4 day old final (eighth) instar larvae of Opisina arenosella (Lepidoptera) stimulate amylase release from midgut preparations maintained in vitro. This effect of the brain extract was both time and dose dependent. The brain factor stimulating enzyme release may be a peptide as it is heat stable and susceptible to treatment with proteolytic enzymes. For purification of the brain factor, a head extract prepared in 2% NaCl was first precipitated in 80% aqueous acetone and then fractionated by DEAE cellulose ion exchange chromatography. The fraction OCF(2), from ion exchange chromatography was further purified on a Sephadex G25 column. The fraction designated as OCF(2.3) obtained by gel filtration showed maximum activity and it was selected for HPLC analysis. HPLC elution profiles of OCF(2.3) showed two major peaks separated by a time interval of 0.107 min. The two overlapping peaks of OCF(2.3) may represent either different forms of a peptide or different peptides of a family. The molecular weight OCF(2.3) was estimated to be 1070 Da.
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Affiliation(s)
- S Harshini
- Department of Zoology, University College, Trivandrum, Kerala 695 034, India
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Harshini S, Nachman RJ, Sreekumar S. In vitro release of digestive enzymes by FMRF amide related neuropeptides and analogues in the lepidopteran insect Opisina arenosella (Walk.). Peptides 2002; 23:1759-63. [PMID: 12383863 DOI: 10.1016/s0196-9781(02)00152-3] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [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: 11/25/2022]
Abstract
The insect neuropeptides FMRF amide, leucomyosupressin (LMS) and neuropeptide analogues leucosulfakinins (FLSK and LSK II Ser (SO(3)H)), perisulfakinin (PSK), proleucosulfakinin (PLSK), 14A[phi1]WP-I, 542phi1, and 378A[5b]WP-I were assayed for their effects on the release of amylase and protease from the midgut tissue of larvae of Opisina arenosella. In the bioassay, empty midgut tubes ligated at both ends using hair were incubated with insect saline containing neuropeptides/analogues in a bioassay apparatus at 37 degrees C for 30 min. After incubation the contents of the midgut preparations were analyzed for amylase and protease activity. In control experiments, the midgut preparations were incubated in insect saline without neuropeptides. The results of the study reveal that for stimulating amylase release from midgut tissue, the peptides require an FXRF amide (X may be methionine or leucine) sequence at the C-terminal. The presence of HMRF amide at C-terminal of peptides may inhibit the release of amylase. Meanwhile, peptides with both FMRF and HMRF amide sequence at the C-terminal are found to be effective in stimulating protease release. The tetrapeptide segment at the C-terminal probably represent the active core of the neuropeptide.
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Affiliation(s)
- S Harshini
- Department of Zoology, University College, Trivandrum 695 034, Kerala, India
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Harshini S, Nachman RJ, Sreekumar S. Inhibition of digestive enzyme release by neuropeptides in larvae of Opisina arenosella (Lepidoptera: Cryptophasidae). Comp Biochem Physiol B Biochem Mol Biol 2002; 132:353-8. [PMID: 12031460 DOI: 10.1016/s1096-4959(02)00047-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Leucokinins are a group of structurally related neuropeptides stimulating gut motility and fluid secretion by Malpighian tubule in insects. For studying effect of neuropeptides on digestive enzyme release, empty midgut tubes of larvae of Opisina arenosella ligated at both ends with hair were incubated with Leucokinins (LK I-VIII), LK analogues and Leucopyrokinin (LPK) in a bioassay apparatus at 37 degrees C for 30 min. The lumen contents were subsequently analyzed for digestive enzyme levels. The neuropeptides LK III, FFSWG amide, 122 A[1] WP-2, LPK and 434 [phi2] WP-1 inhibited the release of digestive enzymes, protease and amylase while LK VIII, unique in having tyrosine residue, stimulated protease release. The minimum sequence of amino acids at the C-terminal required for activity of LK peptides was found to be FXSWGamide (X=Asn, His, Ser, or Trp). The N-terminal pyroglutamate residue and proline at the C-terminal may contribute to the inhibitory effect of LPK on digestive enzyme release. The present study reveals for the first time an inhibitory effect for leucokinins and pyrokinin on the release of digestive enzymes from the insect midgut.
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Affiliation(s)
- S Harshini
- Department of Zoology, University College, Trivandrum-695 034, Kerala, India
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Sreekumar S, Mukunthakumar S, Seeni S. Morphogenetic responses of six Philodendron cultivars in vitro. Indian J Exp Biol 2001; 39:1280-7. [PMID: 12018525] [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: 02/25/2023]
Abstract
In vitro morphogenic response of nodal explants from six cultivars of Philodendron viz, blue mistic, painted lady, pink prince, pluto, royal queen and green emperor was studied. Frequency and number of shoot formation depend on the cultivars and concentration of BAP. High frequency and number of shoot formation were obtained w hen the nodal explants were cultured in Nitsch medium supplemented with BAP (6.8-11.8 microM), sucrose (2%) and agar (0.45%), initially in the dark for 8-10 weeks followed by 16 hr photoperiod. Regenerated shoots were rooted on medium without growth regulators. After two weeks of hardening, rooted and rootless shoots were established in the soil with more than 90 and 65% survival rates respectively, while the unhardened plantlets showed a much lower percentage (20%) establishment. A standard protocol for the rapid multiplication of Philodendron is presented.
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Affiliation(s)
- S Sreekumar
- Plant Biotechnology Division, Tropical Botanic Garden and Research Institute, Palode, Thiruvananthapuram, India
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Sreekumar S, Prabhu VKK. Probable endocrine role of midgut tissue in stimulation of digestive enzyme secretion inOryctes rhinoceros (Coleoptera: Scarabaeidae). ACTA ACUST UNITED AC 1988. [DOI: 10.1007/bf03179513] [Citation(s) in RCA: 3] [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: 10/19/2022]
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