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Ames K, Kaur I, Shi Y, Tong MM, Sinclair T, Hemmati S, Glushakow-Smith SG, Tein E, Gurska L, Steidl U, Dubin R, Shan J, Montagna C, Pradhan K, Verma A, Gritsman K. PI3-kinase deletion promotes myelodysplasia by dysregulating autophagy in hematopoietic stem cells. Sci Adv 2023; 9:eade8222. [PMID: 36812307 PMCID: PMC9946350 DOI: 10.1126/sciadv.ade8222] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Myelodysplastic syndrome (MDS) is a clonal malignancy arising in hematopoietic stem cells (HSCs). The mechanisms of MDS initiation in HSCs are still poorly understood. The phosphatidylinositol 3-kinase (PI3K)/AKT pathway is frequently activated in acute myeloid leukemia, but in MDS, PI3K/AKT is often down-regulated. To determine whether PI3K down-regulation can perturb HSC function, we generated a triple knockout (TKO) mouse model with Pik3ca, Pik3cb, and Pik3cd deletion in hematopoietic cells. Unexpectedly, PI3K deficiency caused cytopenias, decreased survival, and multilineage dysplasia with chromosomal abnormalities, consistent with MDS initiation. TKO HSCs exhibit impaired autophagy, and pharmacologic autophagy induction improved HSC differentiation. Using intracellular LC3 and P62 flow cytometry and transmission electron microscopy, we also observed abnormal autophagic degradation in patient MDS HSCs. Therefore, we have uncovered an important protective role for PI3K in maintaining autophagic flux in HSCs to preserve the balance between self-renewal and differentiation and to prevent MDS initiation.
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Affiliation(s)
- Kristina Ames
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Imit Kaur
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Yang Shi
- Department of Pathology, Montefiore Hospital, Bronx, NY, USA
| | - Meng M. Tong
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Taneisha Sinclair
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Shayda Hemmati
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Shira G. Glushakow-Smith
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Ellen Tein
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Lindsay Gurska
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Ulrich Steidl
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Robert Dubin
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Jidong Shan
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Cristina Montagna
- Department of Radiation Oncology and Genomic Instability and Cancer Genetics, Rutgers Cancer Institute of New Jersey, NJ, USA
| | - Kith Pradhan
- Department of Medical Oncology, Montefiore Hospital, Bronx, NY, USA
| | - Amit Verma
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Medical Oncology, Montefiore Hospital, Bronx, NY, USA
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Kira Gritsman
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Medical Oncology, Montefiore Hospital, Bronx, NY, USA
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Jakhar D, Bhatia V, Gupta R, Kaur I. Dermoscopy as an Auxiliary Tool in the Assessment of Malassezia Folliculitis: An Observational Study. Actas Dermo-Sifiliográficas 2022; 113:78-81. [DOI: 10.1016/j.ad.2020.05.022] [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] [Received: 04/08/2020] [Accepted: 05/14/2020] [Indexed: 10/19/2022] Open
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3
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Whelan A, Doyle P, Ryan C, Kaur I, Mulroy M. 125 WARD-BASED MEDICAL TEAMS: IMPACT ON THE CARE OF THE OLDER PERSON WARD. Age Ageing 2021. [PMCID: PMC8690061 DOI: 10.1093/ageing/afab219.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background The COVID-19 pandemic forced healthcare management to make structural adaptations in the interest of infection control. One such adaptation is the introduction of ward-based medical teams. The multidisciplinary team (MDT) is one of the cornerstones of geriatric medicine. Therefore, we aimed to explore the perception of the care of the older person MDT on the introduction of ward-based medical teams. Methods Qualitative data was collected on a geriatric ward in October 2020 via written questionnaire. The questionnaire analysed how the transition to ward based medical teams was perceived in terms of inter-professional collaboration and clinical service delivered to patients. Results There were 14 respondents, 10 of whom were nursing staff (71%). 86% strongly agreed that the medical team was more accessible, with most interactions occurring face-to-face. Patient care and safety was thought to have improved, 79% and 71% of respondents respectively. 93% felt they had a better rapport with the medical team. 71% felt the MDT meeting is more effective, 57% believed the meeting had greater impact on patient care. However, 93% felt there was less workspace. 21% believed there were more daily admissions and 57% felt the majority of patient transfers from other wards were inappropriate. Overall 86% favoured ward-based medical teams, with 57% of staff reporting that the change led to increased personal job satisfaction. Conclusion By increasing the geographic proximity of doctors to other professionals, doctors were more accessible, issues were tackled quicker, and there was less time wasted bleeping medical teams. Overall staff favoured a ward-based system. However, there are challenges implementing this system. Particular attention should be paid to the availability of adequate workspace, including telephones and computers. Ward transfers should be minimized as continuity of care can be compromised. Strategies should be implemented so medical charts are available to the MDT during consultant-led ward rounds.
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Affiliation(s)
- A Whelan
- Our Lady of Lourdes Hospital, Drogheda, Ireland
| | - P Doyle
- Our Lady of Lourdes Hospital, Drogheda, Ireland
| | - C Ryan
- Our Lady of Lourdes Hospital, Drogheda, Ireland
| | - I Kaur
- Our Lady of Lourdes Hospital, Drogheda, Ireland
| | - M Mulroy
- Our Lady of Lourdes Hospital, Drogheda, Ireland
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Jakhar D, Bhatia V, Gupta R, Kaur I. Dermoscopy as an Auxiliary Tool in the Assessment of Malassezia Folliculitis: An Observational Study. Actas Dermo-Sifiliográficas (English Edition) 2021. [DOI: 10.1016/j.adengl.2021.11.015] [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: 11/26/2022] Open
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5
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Mughal M, Kaur I, Waxman S, Gandhi H, Kakadia M, Khakwani Z, Okoh A, Shah K, Obaid A, Sirpal V, Azad S, Jaffery A, Jagdey H, Tawfik I, Alam M. Clinical outcomes in COVID-19 patients with in-hospital cardiac arrest – an insight from multi-centre data. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
In general, rates of in-hospital cardiac arrest are reportedly 9 to 10 arrests per 1000 admissions, with survival rates of approximately 20–25%. Data regarding clinical characteristics and outcomes in patients with COVID-19 who received in-hospital CPR (cardiopulmonary resuscitation) are limited. This information can help guide end-of-life care conversations between families and health care workers based on real-world experience.
Purpose
To observe the outcomes (survival to discharged alive from the hospital) in critically sick COVID-19 patients who experienced in-hospital cardiac arrest.
Methods
This is a multi-centre institutional review board (IRB) approved retrospective study. The RT-PCR confirmed adult COVID-19 patients consecutively admitted from March 1st to April 30, 2020, were included. Data were extracted manually using the hospital's electronic medical record. The final date of follow-up to monitor clinical outcomes was January 2021.
Results
A total of 721 patients were admitted to the hospital. Of these, only 64 (8.87%) patients had “no CPR” orders.Cardiac arrest occurred in 141 (19.5%) patients. The mean duration of beginning of resuscitation was less than a minute and the mean duration of CPR was 19 minutes. The median age was 65 years; 62.4% were male. The most common co-morbidities were hypertension (66%) and diabetes mellitus (56%). The initial rhythm was non-shockable in 93.7% of patients [asystole in 48.4% and Pulseless Electrical Activity (PEA) in 45.3% of patients]. Only six (4.2%) patients had pulseless ventricular tachycardia and three (2.1%) patients had ventricular fibrillation. A total of eight patients (5.6%) survived and were discharged from the hospital; six (4.25%) had non-shockable and two (0.82%) had shockable initial rhythms. The median age of those who survived was 60 years (Figure 1).
Conclusions
Our study showed that critically sick patients with COVID-19 have a high rate of cardiac arrest and poor outcomes in those who received CPR. A non-shockable initial rhythm indicates that non-cardiac reasons might be playing a major role. These include acute respiratory insufficiency, severe sepsis, or multiorgan failure. These data should inform end-of-life care discussions between providers and patients' families.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- M Mughal
- Monmouth Medical Center, Long Branch, United States of America
| | - I Kaur
- Monmouth Medical Center, Long Branch, United States of America
| | - S Waxman
- Newark Beth Israel Medical Center, The Department of Medicine, Section of Cardiology, Newark, United States of America
| | - H Gandhi
- Monmouth Medical Center, Long Branch, United States of America
| | - M Kakadia
- Monmouth Medical Center, Long Branch, United States of America
| | - Z Khakwani
- Newark Beth Israel Medical Center, The Department of Medicine, Section of Cardiology, Newark, United States of America
| | - A Okoh
- Newark Beth Israel Medical Center, The Department of Medicine, Section of Cardiology, Newark, United States of America
| | - K Shah
- St. Luke's University Hospital, Bethlehem, United States of America
| | - A Obaid
- Monmouth Medical Center, Long Branch, United States of America
| | - V Sirpal
- Monmouth Medical Center, Long Branch, United States of America
| | - S Azad
- Monmouth Medical Center, Long Branch, United States of America
| | - A Jaffery
- Monmouth Medical Center, Long Branch, United States of America
| | - H Jagdey
- Bronx-Lebanon Hospital Center, Bronx NY, United States of America
| | - I Tawfik
- Monmouth Medical Center, Long Branch, United States of America
| | - M Alam
- Baylor College of Medicine, The Department of Medicine, Section of Cardiology, Houston, United States of America
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Jakhar D, Das A, Kaul S, Kaur I, Madke B, Dalal A. Prevalence and characteristics of dermatological manifestations in COVID-19 positive dermatologists: Report from a web-based survey in India. J Eur Acad Dermatol Venereol 2021; 35:e832-e833. [PMID: 34297886 PMCID: PMC8447020 DOI: 10.1111/jdv.17532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/07/2021] [Accepted: 07/06/2021] [Indexed: 01/08/2023]
Affiliation(s)
- D Jakhar
- Dermosphere clinic, New Delhi, India
| | - A Das
- Department of Dermatology, KPC Medical College & Hospital, Kolkata, India
| | - S Kaul
- Department of Internal Medicine, John H Stroger Hospital of Cook county, Chicago, USA
| | - I Kaur
- Department of Dermatology, North Delhi Municipal Corporation Medical College & Hindu Rao Hospital, New Delhi, India
| | - B Madke
- Department of Dermatology, Venereology and Leprology, Jawaharlal Nehru Medical College, Datta Meghe Institute of Medical Sciences, Sawangi Meghe, Wardha, Maharashtra, India
| | - A Dalal
- Department of Dermatology, Saheed Hasan Khan Mewati Government Medical College and Hospital, Nuh, India
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Jakhar D, Kaul S, Kaur I, Kumar S. Wifi-enabled dermoscopy: what is the potential in clinical practice and education? Clin Exp Dermatol 2021; 46:1317-1319. [PMID: 33872396 DOI: 10.1111/ced.14692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2021] [Indexed: 11/28/2022]
Affiliation(s)
- D Jakhar
- Department of Dermatology and STD, North Delhi Municipal Corporation Medical College and Hindu Rao Hospital, New Delhi, India
| | - S Kaul
- Department of internal Medicine, John H Stroger Hospital of Cook County, Chicago, IL, USA
| | - I Kaur
- Department of Dermatology and STD, North Delhi Municipal Corporation Medical College and Hindu Rao Hospital, New Delhi, India
| | - S Kumar
- Department of Dermatology and STD, North Delhi Municipal Corporation Medical College and Hindu Rao Hospital, New Delhi, India
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Learmonth YC, Kaur I, Baynton SL, Fairchild T, Paul L, van Rens F. Changing Behaviour towards Aerobic and Strength Exercise (BASE): Design of a randomised, phase I study determining the safety, feasibility and consumer-evaluation of a remotely-delivered exercise programme in persons with multiple sclerosis. Contemp Clin Trials 2021; 102:106281. [PMID: 33444780 DOI: 10.1016/j.cct.2021.106281] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 01/07/2021] [Accepted: 01/07/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND Multiple sclerosis is a chronic progressive neurological disease. Evidence attests to the benefits of exercise, guidelines for exercise in multiple sclerosis are available. Remote-delivery of exercise adherence programmes based on the exercise guidelines require urgent testing. AIMS The design, and outcomes of Behaviour towards Aerobic and Strength Exercise in MS (BASE-MS), a remotely-delivered exercise training study based principles of behaviour change, will further evaluate the remote-delivery of the current exercise guidelines. METHODS BASE is a 4-month clinically relevant randomised controlled trial to explore the delivery of a remotely supervised, guidelines-based exercise programme for persons with multiple sclerosis, underpinned by principles of health behaviour change. Initially, 72 persons with mild to moderate multiple sclerosis will be randomised in a 1:1:1 allocation to receive the BASE programme, or act as controls continuing usual care. On programme completion, exercise participants will be further randomised to an optimised adherence treatment or usual adherence. Our online survey assesses the primary outcome of exercise participation, and secondary outcomes of symptoms, and correlates of behaviour change at baseline, month four, month five and month eleven. Online surveys will capture coach and participant feedback to identify the contexts, mechanisms and outcomes of BASE implementation. CONCLUSIONS The research and clinical landscape for MS management must remain in-step with public health and health communication. BASE tests the remote-delivery of the current exercise guidelines for exercise in persons with MS. Safety, feasibility and evaluative outcomes will provide rich data for future remote-delivery of exercise in neurological conditions.
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Affiliation(s)
- Y C Learmonth
- Discipline of Exercise Science, Murdoch University, Murdoch, WA, Australia; Perron Institute for Neurological and Translational Science, Perth, WA, Australia; Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Murdoch, WA, Australia.
| | - I Kaur
- Discipline of Exercise Science, Murdoch University, Murdoch, WA, Australia
| | - S L Baynton
- Discipline of Exercise Science, Murdoch University, Murdoch, WA, Australia
| | - T Fairchild
- Discipline of Exercise Science, Murdoch University, Murdoch, WA, Australia; Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Murdoch, WA, Australia
| | - L Paul
- School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, UK
| | - F van Rens
- Discipline of Exercise Science, Murdoch University, Murdoch, WA, Australia
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Kaur I, Chawla N, Dhatt A, Kaur M. Evaluation of Physico-Chemical Composition in Bulbs of Red, Yellow, and White Onion (Allium Cepa L.) Genotypes of Sub-Tropical India. AAlim 2020. [DOI: 10.1556/066.2020.49.4.14] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In this study, thirty onion (Allium cepa L.) genotypes grown in sub-tropical region of India were analysed for different physico-chemical attributes. There were significant differences among genotypes, and the onion genotypes showed a tendency to be classified according to different colours. The cultivars of the same colour exhibited similar tendencies in terms of accumulating most of the analysed components. About 1.78 fold variation in dry matter (%) and 2 fold variation in fresh weight per bulb were recorded among coloured onions. Red genotype D-888-B possessed maximum contents of TS and NRS, while the yellow coloured genotype POH-5 accumulated highest RS and lowest NRS contents. Maximum values of fructans (3.68 g/100 g DW), AIS (6 g/100 g DW), protein (10.61 g/100 g DW), and FAA (4.24 g/100 g DW) were also found in red coloured genotypes D-715-B, D-97-B, PR-305, and D-PS-121-B, respectively. Proline content in different genotypes was found to vary about 6.9 fold. The correlation studies showed a positive relationship between most of the quality parameters. Our results suggested that red group genotypes were better than yellow and white groups for all the studied parameters except for RS, which makes red genotypes more suitable for processing purposes.
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Affiliation(s)
- I. Kaur
- Punjab Agricultural University, Ludhiana, 141001-India
| | - N. Chawla
- Punjab Agricultural University, Ludhiana, 141001-India
| | - A.S. Dhatt
- Punjab Agricultural University, Ludhiana, 141001-India
| | - M. Kaur
- Punjab Agricultural University, Ludhiana, 141001-India
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Mitra S, Barik S, Suryavanshi M, Dewan A, Aggarwal S, Kaur I, Kumar D, Khurana H, Vishwakarna G, Dobriyal K, Sharief MI, Umesh P, Jwala M, Mishra M. To Study The Role Of Pre-treatment MicroRNA Expression As A Predictor Of Response To Chemoradiation In Locally Advanced Carcinoma Cervix. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1617] [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: 10/23/2022]
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Hemmati S, Sinclair T, Tong M, Bartholdy B, Okabe R, Ames K, Ostrodka L, Haque T, Kaur I, Agarwal A, Zhao J, Roberts T, Gritsman K. Abstract IA18: The PI3K isoforms in myeloid leukemia and hematopoietic stem cells. Mol Cancer Res 2020. [DOI: 10.1158/1557-3125.pi3k-mtor18-ia18] [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
The Class IA PI3 kinase isoforms (p110α, β, and δ) transduce many growth factor signals that are important for the proliferation, differentiation, and self-renewal of hematopoietic stem cells (HSCs). Mutations in growth factor receptors or RAS proteins are commonly observed in patients with acute myeloid leukemia (AML), leading to activation of the PI3K/AKT pathway. Therefore, PI3K inhibition is an attractive therapeutic strategy for a large subset of AML patients. We previously reported that p110α is dispensable for HSC function, suggesting that redundancy exists between the Class IA isoforms in HSCs (Gritsman et al., J Clin Invest 2014). However, we have identified a specific role for p110α in RAS-mutated myeloid leukemia. Furthermore, we found that the p110α-selective inhibitor BYL-719 can sensitize RAS-mutated leukemic cells to the MEK inhibitor MEK-162. While PI3K inhibitors have multiple clinical indications, including in hematologic malignancies, it is still unclear whether PI3K plays an important role in normal HSC function. Upon environmental stresses like chemotherapy or infection, quiescent HSCs must enter the cell cycle to re-establish homeostasis and promote emergency myelopoiesis. To test for redundancy between p110α and p110δ in HSCs, we generated p110α and p110δ double knockout (DKO) mice, with germline deletion of p110δ and conditional deletion of p110α. DKO mice have leukopenia, anemia, and decreased numbers of lymphoid-primed multipotent progenitors (LMPPs) in the bone marrow, though HSC numbers are unchanged. In competitive repopulation assays, B-cell maintenance was severely impaired, while the myeloid and T-cell lineages were relatively preserved. This suggests that HSC function is not impaired at steady state. We performed transcriptome analysis of DKO, p110δ, and p110α KO HSCs and LMPPs after bone marrow transplantation. Gene set enrichment analysis revealed downregulation of gene sets associated with cell cycle progression. Interestingly, we also observed negative enrichment of inflammatory response gene sets in both p110δ KO and DKO HSCs and LMPPs. To examine the roles of p110δ and α in the hematopoietic stress response, we injected p110δ, DKO, and WT mice with 5-fluorouracil. We observed significantly decreased survival of 5-FU-treated DKO mice due to impaired hematopoietic recovery, associated with the failure of HSCs to enter the cell cycle. Consistent with this finding, we also observed a decrease in myeloid reconstitution by DKO HSCs in secondary competitive transplantation, suggesting that p110α and p110δ play redundant roles in emergency myelopoiesis. We also observed defects in downstream signaling in DKO HSCs and progenitors in response to IL1β or TNFα stimulation. Our results suggest that p110α and δ act in a redundant fashion to transduce specific inflammatory signals in HSPCs in response to hematopoietic stress. Our results have important implications for the use of PI3K inhibitors in combination with chemotherapy and in other hematopoietic stress conditions.
Citation Format: Shayda Hemmati, Taneisha Sinclair, Meng Tong, Boris Bartholdy, Rachel Okabe, Kristina Ames, Leanne Ostrodka, Tamanna Haque, Imit Kaur, Anupriya Agarwal, Jean Zhao, Thomas Roberts, Kira Gritsman. The PI3K isoforms in myeloid leukemia and hematopoietic stem cells [abstract]. In: Proceedings of the AACR Special Conference on Targeting PI3K/mTOR Signaling; 2018 Nov 30-Dec 8; Boston, MA. Philadelphia (PA): AACR; Mol Cancer Res 2020;18(10_Suppl):Abstract nr IA18.
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Affiliation(s)
| | | | - Meng Tong
- 1Albert Einstein College of Medicine, Bronx, NY,
| | | | - Rachel Okabe
- 1Albert Einstein College of Medicine, Bronx, NY,
| | | | | | | | - Imit Kaur
- 1Albert Einstein College of Medicine, Bronx, NY,
| | | | - Jean Zhao
- 3Dana-Farber Cancer Institute, Boston, MA
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Goel R, Kaur I, Mahajan K, Chatterjee M. PMU8 The Increasing Burden of NON-Communicable Diseases in India. Value Health Reg Issues 2020. [DOI: 10.1016/j.vhri.2020.07.366] [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: 11/26/2022]
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Jakhar D, Kaur I, Kaul S. Screen mirroring, screen casting and screen sharing during COVID-19: what dermatologists should know. Clin Exp Dermatol 2020; 45:750-751. [PMID: 32304574 PMCID: PMC7264592 DOI: 10.1111/ced.14247] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 04/15/2020] [Indexed: 12/02/2022]
Affiliation(s)
- D Jakhar
- Department of Dermatology, North Delhi Municipal Corporation Medical College and Hindu Rao Hospital, New Delhi, India
| | - I Kaur
- Department of Dermatology, North Delhi Municipal Corporation Medical College and Hindu Rao Hospital, New Delhi, India
| | - S Kaul
- Department of Internal Medicine, John H. Stroger Hospital of Cook County, Chicago, IL, USA
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Kaur I, Jakhar D. Intraoperative onychoscopy and histopathological correlation of red lunula in nail lichen planus: a case series. Clin Exp Dermatol 2020; 45:884-887. [PMID: 32358798 DOI: 10.1111/ced.14265] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2020] [Indexed: 11/28/2022]
Abstract
The lunula is the white half-moon-shaped area located at the base of the fingernails and toenails, and is the only visible part of nail matrix. Red lunula can present as a complete form (the whole lunula is red), incomplete form (only the proximal lunula is red) or mottled form. Red lunula has been associated with a number of dermatological and systemic conditions. It is one of the less common manifestations of nail lichen planus (LP). However, the pathogenesis of the red lunula is not yet clear. We present a series of six patients with nail LP presenting with red lunula, and describe the findings of intraoperative onychoscopy and histopathology in an attempt to understand the pathogenesis underlying the condition.
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Affiliation(s)
- I Kaur
- Department of Dermatology, Venereology and Leprosy, North Delhi Municipal Corporation Medical College and Hindu Rao Hospital, New Delhi, India
| | - D Jakhar
- Department of Dermatology, Venereology and Leprosy, North Delhi Municipal Corporation Medical College and Hindu Rao Hospital, New Delhi, India
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Jakhar D, Kaul S, Kaur I. WhatsApp messenger as a teledermatology tool during coronavirus disease (COVID‐19): from bedside to phone‐side. Clin Exp Dermatol 2020; 45:739-740. [PMID: 32243612 PMCID: PMC9213937 DOI: 10.1111/ced.14227] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/24/2020] [Indexed: 11/27/2022]
Affiliation(s)
- D. Jakhar
- Department of Dermatology North Delhi Municipal Corporation Medical College & Hindu Rao Hospital New Delhi India
| | - S. Kaul
- Department of Internal Medicine John H. Stroger Hospital of Cook County Chicago IL USA
| | - I. Kaur
- Department of Dermatology North Delhi Municipal Corporation Medical College & Hindu Rao Hospital New Delhi India
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Jakhar D, Kaur I, Kaul S. Art of performing dermoscopy during the times of coronavirus disease (COVID-19): simple change in approach can save the day! J Eur Acad Dermatol Venereol 2020; 34:e242-e244. [PMID: 32223004 DOI: 10.1111/jdv.16412] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- D Jakhar
- Department of Dermatology, North Delhi Municipal Corporation Medical College & Hindu Rao Hospital, New Delhi, India
| | - I Kaur
- Department of Dermatology, North Delhi Municipal Corporation Medical College & Hindu Rao Hospital, New Delhi, India
| | - S Kaul
- Department of internal Medicine, John H Stroger Hospital of Cook County, Chicago, IL, USA
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Dewan A, Mitra S, Varghese A, Aggarwal S, Kaur I, Khurana R, Raman K, Tamilarasu S, Bhushan M, Dutta S, Barik S, Sundari A, Dobriyal K. PO-158: Dosimetric comparison of 3D and 2D vaginal brachy in post-op patients with endometrial/cervical ca. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(20)30500-4] [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: 11/28/2022]
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18
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Mitra S, Khurana R, Dewan A, Kaur I, Aggarwal S, Barik S, Dutta S, Varghese A, Mishra M. Clinical Outcomes and Patterns of Failure after D2 Gastrectomy and Adjuvant Chemoradiotherapy in Patients with Locally Advanced Carcinoma Stomach: A Retrospective Review From A Tertiary Care Cancer Research Institute. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.2045] [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: 12/01/2022]
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Abstract
Raoultella ornithinolytica is an encapsulated gram-negative aerobic bacillus belonging to the Enterobacteriaceae family. It is one of the three species of Raoultella. Human infections related to R. ornithinolytica are exceedingly rare. This case report describes an ENT infection caused by R. ornithinolytica successfully treated with antibiotic therapy.
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Affiliation(s)
- M Singh
- Department of ENT, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
| | - I Kaur
- Department of ENT, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
| | - D K Mundi
- Department of ENT, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
| | - A Kaur
- Department of General Surgery, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
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Jakhar D, Kaur I. Artificial intelligence, machine learning and deep learning: definitions and differences. Clin Exp Dermatol 2019; 45:131-132. [DOI: 10.1111/ced.14029] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2019] [Indexed: 12/15/2022]
Affiliation(s)
- D. Jakhar
- Department of Dermatology and STD NDMC Medical College & Hindu Rao Hospital New Delhi 110007 India
| | - I. Kaur
- Kaya Skin Clinic New Delhi India
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21
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Abstract
Hamartomatous polyps of the tonsil are rare. They have been described using various terms such as a lymphangiomatous polyp, lymphangiectatic fibrous polyp, lipomatous polyp, or pedunculated tonsil; hence, the actual incidence is difficult to be quantified. Polyp of the palatine tonsils is an unusual benign lesion of the head and neck. It is a rare polypoidal mass that generally arises from a pedicle attached to the tonsil and projecting into the oropharynx. Polypoid lesions of the head and neck are likewise rare, and such tumors arising from the palatine tonsils are sparse. Tonsillar polyp is an uncommon hamartomatous lesion that generally arises from the tonsillar surface. It has rarely been reported in the medical literature. We present a case of hamartomatous polyp of the palatine tonsil in a 17-year-old male patient.
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Affiliation(s)
- M Singh
- Department of ENT, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
| | - D K Mundi
- Department of ENT, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
| | - I Kaur
- Department of ENT, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
| | - A Kaur
- Department of General Surgery, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
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22
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Jakhar D, Kaur I. Predatory conferences: a flimflam academic deception. Clin Exp Dermatol 2019; 44:948-949. [PMID: 31162846 DOI: 10.1111/ced.14020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2019] [Indexed: 11/28/2022]
Affiliation(s)
- D Jakhar
- Department of Dermatology and STD, North Delhi Municipal Corporation Medical College and Hindu Rao Hospital, New Delhi, India
| | - I Kaur
- Kaya Skin Clinic, New Delhi, India
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23
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Hemmati S, Sinclair T, Tong M, Bartholdy B, Okabe RO, Ames K, Ostrodka L, Haque T, Kaur I, Mills TS, Agarwal A, Pietras EM, Zhao JJ, Roberts TM, Gritsman K. PI3 kinase alpha and delta promote hematopoietic stem cell activation. JCI Insight 2019; 5:125832. [PMID: 31120863 DOI: 10.1172/jci.insight.125832] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Many cytokines and chemokines that are important for hematopoiesis activate the PI3K signaling pathway. Because this pathway is frequently mutated and activated in cancer, PI3K inhibitors have been developed for the treatment of several malignancies, and are now being tested in the clinic in combination with chemotherapy. However, the role of PI3K in adult hematopoietic stem cells (HSCs), particularly during hematopoietic stress, is still unclear. We previously showed that the individual PI3K catalytic isoforms P110α or P110β have dispensable roles in HSC function, suggesting redundancy between PI3K isoforms in HSCs. We now demonstrate that simultaneous deletion of P110α and P110δ in double knockout (DKO) HSCs uncovers their redundant requirement in HSC cycling after 5-fluorouracil (5-FU) chemotherapy administration. In contrast, DKO HSCs are still able to exit quiescence in response to other stress stimuli, such as LPS. We found that DKO HSCs and progenitors have impaired sensing of inflammatory signals ex vivo, and that levels of IL1-β and MIG are higher in the bone marrow after LPS than after 5-FU administration. Furthermore, exogenous in vivo administration of IL1-β can induce cell cycle entry of DKO HSCs. Our findings have important clinical implications for the use of PI3K inhibitors in combination with chemotherapy.
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Affiliation(s)
- Shayda Hemmati
- Department of Medicine and.,Department of Cell Biology, Albert Einstein College of Medicine, New York, New York, USA
| | - Taneisha Sinclair
- Department of Medicine and.,Department of Cell Biology, Albert Einstein College of Medicine, New York, New York, USA
| | - Meng Tong
- Department of Medicine and.,Department of Cell Biology, Albert Einstein College of Medicine, New York, New York, USA
| | - Boris Bartholdy
- Department of Cell Biology, Albert Einstein College of Medicine, New York, New York, USA
| | - Rachel O Okabe
- Department of Medicine and.,Department of Cell Biology, Albert Einstein College of Medicine, New York, New York, USA
| | - Kristina Ames
- Department of Medicine and.,Department of Cell Biology, Albert Einstein College of Medicine, New York, New York, USA
| | - Leanne Ostrodka
- Department of Medicine and.,Department of Cell Biology, Albert Einstein College of Medicine, New York, New York, USA
| | - Tamanna Haque
- Department of Cell Biology, Albert Einstein College of Medicine, New York, New York, USA.,Department of Medical Oncology, Montefiore Hospital, New York, New York, USA
| | - Imit Kaur
- Department of Medicine and.,Department of Cell Biology, Albert Einstein College of Medicine, New York, New York, USA
| | - Taylor S Mills
- Division of Hematology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Anupriya Agarwal
- Knight Cancer Institute, Oregon Health Sciences University, Portland, Oregon, USA
| | - Eric M Pietras
- Division of Hematology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Jean J Zhao
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Thomas M Roberts
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Kira Gritsman
- Department of Medicine and.,Department of Cell Biology, Albert Einstein College of Medicine, New York, New York, USA.,Department of Medical Oncology, Montefiore Hospital, New York, New York, USA
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Affiliation(s)
- I Kaur
- Department of Dermatology and STD, University College of Medical Sciences and GTB Hospital (University of Delhi), New Delhi, India
| | - D Jakhar
- Department of Dermatology and STD, University College of Medical Sciences and GTB Hospital (University of Delhi), New Delhi, India
| | - S N Bhattacharya
- Department of Dermatology and STD, University College of Medical Sciences and GTB Hospital (University of Delhi), New Delhi, India
| | - S Sharma
- Department of Pathology, University College of Medical Sciences and GTB Hospital (University of Delhi), New Delhi, India
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Kaur J, Singh M, Kaur I, Singh A, Goyal S. A comparative study of gloved versus ungloved merocel ® as nasal pack after septoplasty. Niger J Clin Pract 2018; 21:1391-1395. [PMID: 30417834 DOI: 10.4103/njcp.njcp_414_17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Introduction Septoplasty or septal reconstruction is a corrective surgical procedure performed to straighten the nasal septum. It may be associated with numerous complications. To minimize these complications, both nasal cavities are frequently packed with different types of nasal packing. Materials and Methods This prospective, observational, and comparative study was undertaken in the Department of ENT, Rajindra Hospital, Patiala, Punjab, India. A total of sixty patients fulfilling the inclusion criteria participated in the study. They were divided into two groups, Groups A and B. After septoplasty, the nasal cavity was packed with gloved Merocel® in Group A and ungloved Merocel® in control group (Group B). The efficacy and patient tolerance for both nasal packings were compared and assessed. The data collected were compiled and analyzed statistically. Results In our study, it was demonstrated that gloved Merocel® produces less pain during pack insertion (P = 0.001) and produces less pain while insertion of pack in situ (P = 0.001) and during pack removal (P = 0.001). Saccharin transit time (STT) returned back to normal in gloved Merocel® group (P = 0.001) in most of patients (27) by the 2nd week, whereas STT in ungloved Merocel® group returned back to normal by the 4th week postoperatively. The differences in impairment in STT between the two groups were found to be statistically significant. There was no statistical significance between both groups for other parameters. Conclusion Gloved Merocel® may be preferred over ungloved Merocel® as nasal packing following septoplasty since both types of packs had similar hemostatic, adhesion prevention properties and similar incidence in postoperative complications and gloved Merocel® produces less pain during its insertion, while it is in situ, during its removal with early recovery of nasal mucociliary clearance mechanism of nose.
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Affiliation(s)
- J Kaur
- Department of ENT, GMC, Patiala, Punjab, India
| | - M Singh
- Department of ENT, GMC, Patiala, Punjab, India
| | - I Kaur
- Department of ENT, GMC, Patiala, Punjab, India
| | - A Singh
- Depatrment of ENT, GMCH, Chandigarh, India
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26
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Singla G, Singh M, Singh A, Kaur I, Harsh K, Jasmeen K. Is sino-nasal outcome test-22 reliable for guiding chronic rhinosinusitis patients for endoscopic sinus surgery? Niger J Clin Pract 2018; 21:1228-1233. [PMID: 30156212 DOI: 10.4103/njcp.njcp_429_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Chronic rhino-sinusitis (CRS) is a significant health problem whose incidence and prevalence is rising. An emphasis has been placed on diseasespecific quality of life (QoL as the predominant measure for most current outcome studies. Therefore a validated measure of health-related QoL in sinonasal disease is needed. The present prospective and observational study was conducted on 50 patients in the Department of ENT at Govt. Medical College and Rajindra Hospital Patiala, Punjab, India. The primary outcomes were the following: (1) the chance of attaining minimal clinically important difference (MCID) improvements of nine points at the 22-item Sino-Nasal Outcome Test (SNOT-22) after endoscopic sinus surgery (ESS) for different preoperative QoL levels, and (2) the percentage of relative improvement in SNOT-22 after ESS for different preoperative QoL levels. Methods Patients with CRS who were elected for ESS were prospectively enrolled into an observational cohort study. They were categorized into 10 preoperative SNOT-22 groups based on 10-point increments beginning with a score of 10 and ending at 110. Standard protocol for all patients presenting for evaluation included completion of the SNOT-22 prior to and following surgical intervention. The scores were calculated and the data collected were compiled and analyzed. Results A total of 50 patients were included in this study. Patients with a SNOT-22 score between 10 and 19 had the lowest chance of achieving an MCID. Patients with a SNOT-22 score greater than 30 had a greater than 90% chance of achieving an MCID, and there was a relative improvement of 43.3% on their preoperative SNOT-22 scores. CRS patients with polyp had better outcomes (47.1% improvement) after ESS than those without polyp (33.2% improvement). Conclusion There is an increased probability of achieving an MCID at SNOT-22 score >30 and in general the percentage of relative improvement increased with an increase in preoperative SNOT score.
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Affiliation(s)
- G Singla
- Department of ENT and Head and Neck Surgery, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
| | - M Singh
- Department of ENT and Head and Neck Surgery, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
| | - A Singh
- Department of ENT and Head and Neck Surgery, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
| | - I Kaur
- Department of ENT and Head and Neck Surgery, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
| | - K Harsh
- Department of ENT and Head and Neck Surgery, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
| | - K Jasmeen
- Department of ENT and Head and Neck Surgery, Government Medical College and Rajindra Hospital, Patiala, Punjab, India
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27
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Rai S, Tandon M, Singh N, Kaur I. Development, optimization, standardization and validation of a simple in-house agar gradient method to determine vancomycin MIC's for Staphylococcus aureus. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.285] [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: 11/26/2022] Open
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Kaur I, Constance JE, Kosak KM, Spigarelli MG, Sherwin CMT. An extensive pharmacokinetic, metabolic and toxicological review of elderly patients under intensive chemotherapy for acute myeloid leukemia. Expert Opin Drug Metab Toxicol 2014; 11:53-65. [DOI: 10.1517/17425255.2015.972934] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Imit Kaur
- 1University of Utah School of Medicine, Division of Clinical Pharmacology, Department of Pediatrics, 295 Chipeta Way, Salt Lake City, UT 84108, USA ;
| | - Jonathan E Constance
- 1University of Utah School of Medicine, Division of Clinical Pharmacology, Department of Pediatrics, 295 Chipeta Way, Salt Lake City, UT 84108, USA ;
| | - Ken M Kosak
- 2University of Utah, Division of Hematology and Hematologic Malignancies and Huntsman Cancer Institute, Salt Lake City, UT, USA
| | - Michael G Spigarelli
- 1University of Utah School of Medicine, Division of Clinical Pharmacology, Department of Pediatrics, 295 Chipeta Way, Salt Lake City, UT 84108, USA ;
| | - Catherine MT Sherwin
- 1University of Utah School of Medicine, Division of Clinical Pharmacology, Department of Pediatrics, 295 Chipeta Way, Salt Lake City, UT 84108, USA ;
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Kaur I, Kosak KM, Terrazas M, Herron JN, Kern SE, Boucher KM, Shami PJ. Effect of a Pluronic(®) P123 formulation on the nitric oxide-generating drug JS-K. Pharm Res 2014; 32:1395-406. [PMID: 25330743 DOI: 10.1007/s11095-014-1542-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 10/02/2014] [Indexed: 10/24/2022]
Abstract
PURPOSE O(2)-(2,4-dinitrophenyl)1-[(4-ethoxycarbonyl)piperazin-1-yl]diazen-1-ium-1,2-diolate] or JS-K is a nitric oxide-producing prodrug of the arylated diazeniumdiolate class with promising anti-tumor activity. JS-K has challenging solubility and stability properties. We aimed to characterize and compare Pluronic(®) P123-formulated JS-K (P123/JS-K) with free JS-K. METHODS We determined micelle size, shape, and critical micelle concentration of Pluronic(®) P123. Efficacy was evaluated in vitro using HL-60 and U937 cells and in vivo in a xenograft in NOD/SCID IL2Rγ (null) mice using HL-60 cells. We compared JS-K and P123/JS-K stability in different media. We also compared plasma protein binding of JS-K and P123/JS-K. We determined the binding and Stern Volmer constants, and thermodynamic parameters. RESULTS Spherical P123/JS-K micelles were smaller than blank P123. P123/JS-K formulation was more stable in buffered saline, whole blood, plasma and RPMI media as compared to free JS-K. P123 affected the protein binding properties of JS-K. In vitro it was as efficacious as JS-K alone when tested in HL-60 and U937 cells and in vivo greater tumor regression was observed for P123/JS-K treated NOD/SCID IL2Rγ (null) mice when compared to free JS-K-treated NOD/SCID IL2Rγ (null) mice. CONCLUSIONS Pluronic(®) P123 solubilizes, stabilizes and affects the protein binding characteristics of JS-K. P123/JS-K showed more in vivo anti-tumor activity than free JS-K.
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Affiliation(s)
- Imit Kaur
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah, USA
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31
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Kaur I, Terrazas M, Kosak KM, Kern SE, Boucher KM, Shami PJ. Cellular distribution studies of the nitric oxide-generating antineoplastic prodrug O(2) -(2,4-dinitrophenyl)1-((4-ethoxycarbonyl)piperazin-1-yl)diazen-1-ium-1,2-diolate formulated in Pluronic P123 micelles. ACTA ACUST UNITED AC 2013; 65:1329-36. [PMID: 23927471 DOI: 10.1111/jphp.12100] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Accepted: 05/24/2013] [Indexed: 12/25/2022]
Abstract
OBJECTIVE Nitric oxide (NO) possesses antitumour activity. It induces differentiation and apoptosis in acute myeloid leukaemia (AML) cells. The NO prodrug O(2) -(2,4-dinitrophenyl)1-((4-ethoxycarbonyl)piperazin-1-yl)diazen-1-ium-1,2-diolate, or JS-K, has potent antileukaemic activity. JS-K is also active in vitro and in vivo against multiple myeloma, prostate cancer, non-small-cell lung cancer, glioma and liver cancer. Using the Pluronic P123 polymer, we have developed a micelle formulation for JS-K to increase its solubility and stability. The goal of the current study was to investigate the cellular distribution of JS-K in AML cells. METHODS We investigated the intracellular distribution of JS-K (free drug) and JS-K formulated in P123 micelles (P123/JS-K) using HL-60 AML cells. We also studied the S-glutathionylating effects of JS-K on proteins in the cytoplasmic and nuclear cellular fractions. KEY FINDINGS Both free JS-K and P123/JS-K accumulate primarily in the nucleus. Both free JS-K and P123/JS-K induced S-glutathionylation of nuclear proteins, although the effect produced was more pronounced with P123/JS-K. Minimal S-glutathionylation of cytoplasmic proteins was observed. CONCLUSIONS We conclude that a micelle formulation of JS-K increases its accumulation in the nucleus. Post-translational protein modification through S-glutathionylation may contribute to JS-K's antileukaemic properties.
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Affiliation(s)
- Imit Kaur
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, USA
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Kaur I, Terrazas M, Kosak KM, Shami PJ. Abstract 2109: Activation of multiple cellular stresses by the NO generating antineoplastic agent JS-K. Cancer Res 2013. [DOI: 10.1158/1538-7445.am2013-2109] [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
The NO prodrug O2-(2,4-dinitrophenyl) 1-[(4-ethoxycarbonyl)piperazin-1-yl]diazen-1-ium-1,2-diolate or JS-K is active against acute myeloid leukemia (AML), multiple myeloma, hepatocellular carcinoma, prostate cancer, glioma and non-small lung cancer. We have developed a nanoscale micelle formulation for JS-K (P123/JS-K) using Pluronic® P123 polymers to stabilize and solubilize the drug. In the present study, the mechanism of action of JS-K was investigated. We speculated that, being a NO-releasing drug, JS-K causes nitrosative/oxidative stress. We therefore hypothesized that JS-K causes multiple stress responses that ultimately trigger apoptosis in the cell. We also hypothesized that JS-K affects the “intrinsic component” (defined as cell cycle, survival and stress pathways in the cell) of leukemic cells.
In this work, using human myeloid leukemia HL-60 cells, we studied the effect of JS-K on two major cellular stresses, namely ER stress and nitrosative/oxidative stress. On treating HL-60 cells with 5μM JS-K formulated in DMSO (JS-K) or P123/JS-K for 4-8 hours, activation of both GRP-78 and CHOP (markers of ER stress) was observed using western blot analysis. ER stress could also be triggered by phosphorylation of JNK protein. Again, using western blot analysis, JNK phosphorylation was observed when HL60 cells were treated with JS-K or P123/JS-K for 4-6 hours. Oxidative stress was studied by quantifying intracellular levels of reactive oxygen/reactive nitrogen species (ROS/RNS) using the ROS/RNS sensitive fluorophore 5-(and-6)-chloromethyl-2’-7’-dichlorodihydrofluorescein diacetate. Treatment of HL-60 cells with 5μM of JS-K or P123/JS-K for 30, 60 or 120 minutes lead to increased levels of ROS/RNS.
These experiments show that JS-K activates the intrinsic component of cell death by producing ER stress and oxidative stress. JS-K is at an advanced stage of pre-clinical development. Its novel and multiple mechanisms of action make it an attractive therapy for the treatment of AML and other malignancies.
Citation Format: Imit Kaur, Moises Terrazas, Ken M. Kosak, Paul J. Shami. Activation of multiple cellular stresses by the NO generating antineoplastic agent JS-K. [abstract]. In: Proceedings of the 104th Annual Meeting of the American Association for Cancer Research; 2013 Apr 6-10; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2013;73(8 Suppl):Abstract nr 2109. doi:10.1158/1538-7445.AM2013-2109
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Affiliation(s)
- Imit Kaur
- 1Univ. of Utah Pharmaceutics and Pharmaceutical Chemistry, Salt Lake City, UT
| | | | - Ken M. Kosak
- 2Univ. of Utah Huntsman Cancer Inst., Salt Lake City, UT
| | - Paul J. Shami
- 2Univ. of Utah Huntsman Cancer Inst., Salt Lake City, UT
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Reddy AK, Balne PK, Reddy RK, Mathai A, Kaur I. Loop-mediated isothermal amplification assay for the diagnosis of retinitis caused by herpes simplex virus-1. Clin Microbiol Infect 2011; 17:210-3. [PMID: 20298270 PMCID: PMC7128213 DOI: 10.1111/j.1469-0691.2010.03216.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A loop-mediated isothermal amplification (LAMP) assay was developed for the detection of herpes simplex virus 1 (HSV-1). The specificity of the assay was tested using DNA extracted from HSV-1-infected rabbit corneal epithelium cultures, HSV-2 grown on Vero cell line, cytomegalovirus (CMV) (AD-169), varicella zoster virus (VZV) (Oka-vaccine), adenovirus, Aspergillus flavus and Staphylococcus aureus. The specificity of LAMP was confirmed by bidirectional sequencing of the amplicons. The sensitivity of the LAMP assay was tested using different concentrations of HSV-1 DNA. To evaluate the application of the LAMP assay in clinical diagnosis, we tested vitreous samples from 20 patients with suspected viral retinitis using LAMP and real-time PCR for HSV-1. The LAMP primers amplified only HSV-1 DNA; no LAMP products were detected with the DNAs of HSV-2, CMV, VZV, adenovirus A. flavus and S. aureus. The sequences of the positive HSV-1 LAMP products perfectly (99–100%) matched the HSV-1 sequences deposited in the GenBank database. LAMP is as sensitive as real-time PCR, with the lowest detection limit being 10 copies/μL of HSV-1 DNA. Of the 20 patients with suspected viral retinitis, four tested positive for HSV-1 using real- time PCR and LAMP. A 100% concordance was observed across the two methods. The LAMP assay is a rapid, highly specific and sensitive method for the diagnosis of retinitis caused by HSV-1.
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Affiliation(s)
- A K Reddy
- Jhaveri Microbiology Centre, Hyderabad Eye Research Foundation, LV Prasad Eye Institute, Hyderabad, India.
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Kaur I, Kosak KM, Sweeley JC, Terrazas M, Saavedra JE, Keefer LK, Herron JN, Shami PJ. Abstract 4392: Protein Interaction and Binding Studies of the Nitric Oxide-Generating Antineoplastic Agent JS-K. Cancer Res 2011. [DOI: 10.1158/1538-7445.am2011-4392] [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
The NO prodrug O2-(2,4-dinitrophenyl) 1-[(4-ethoxycarbonyl)piperazin-1-yl]diazen-1-ium-1,2-diolate or JS-K is active against acute myeloid leukemia, multiple myeloma, hepatocellular carcinoma, prostate cancer and non-small lung cancer. We have developed a nanoscale micelle formulation for JS-K using Pluronic® P123 polymers. We studied the interaction between P123-formulated JS-K and free JS-K formulated in 40% DMSO/PBS with 4% human serum albumin (HSA) and 0.09% alpha1 acid glycoprotein (AGP). Particle size was measured by dynamic light scattering. HSA had a single peak (8.2 ± 0.51 nm), but 2 peaks were observed when HSA was mixed with 2.25% P123 (peak 1: 10.65 ± 0.484 nm; peak 2: 133.15 ± 11.95 nm). AGP had 2 peaks (peak 1: 236.33 ± 10.71 nm; peak 2: 9.73 ± 0.12 nm) but a single peak (23.49 nm ± 0.09) was observed in the presence of 2.25% P123, suggesting interaction with P123. Binding studies of both P123 JS-K and free JS-K with HSA and AGP were carried out by dialysis at concentrations of 20 -700 µM for 2 hours. At that time point, saturation of drug-protein binding was observed with the P123 formulation but not with free JS-K. Both P123 JS-K and free JS-K were nearly 100% bound with HSA at concentrations ≤ 50 µM. Total recovery for P123 JS-K was higher than free JS-K, indicating stabilization of the drug. At concentrations of 100, 200, 300, 400, 500, 600, and 700 µM of P123 JS-K, 73.5% ± 15, 80.5% ± 5, 82.6% ± 5, 76.1% ± 11.5, 76.2% ± 9, 74.7% ± 0.4, and 71.9% ± 9.4 HSA binding was observed, respectively (average and SEM of 3 experiments). For free JS-K at similar concentrations, the percentage drug bound were 77.3% ± 11, 80.3% ± 5.5, 68.6% ± 3.1, 66.5% ± 1.6, 60.6% ± 1.9, 62.0% ± 1.5, and 54.7% ± 5.76, respectively (average and SEM of 3 experiments). Differences between the unbound fraction of P123-formulated JS-K and free JS-K were statistically significant (P < 0.001) for each JS-K concentration. The binding constants for P123 JS-K and free JS-K were 3.023 × 10-3/μM and 4.3 × 10-2/μM, respectively. We evaluated protein binding of JS-K by measuring protein fluorescence quenching of tryptophan. Fluorometric analysis with HSA was carried out for P123 JS-K or free JS-K concentrations ranging of 20 to 700 µM at 30 minutes. A Stern Volmer constant of 3.58 × 10-3/µM and 1.5 × 10-2/µM was obtained for P123 JS-K and free JS-K, respectively (3 different experiments, r2 =0.99 and 0.77, respectively). Fluorescence analysis of the interaction between P123 JS-K or free JS-K with AGP was carried out at similar concentrations after 30 minutes. The Stern Volmer constants for the interaction between P123 JS-K and AGP and free JS-K and AGP were 2 × 10-3/µM and 3 × 10-3/µM, respectively (average of three different experiments, r2 = 0.67 and 0.91 respectively). These experiments show that JS-K interacts with serum proteins. Pluronic® P123 micelles affect this interaction. Such interactions are likely to influence the in vivo pharmacokinetic properties of the drug.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 4392. doi:10.1158/1538-7445.AM2011-4392
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Affiliation(s)
- Imit Kaur
- 1Univ. of Utah Department of Pharmaceutics and Pharmaceutical Chemistry, Salt Lake City, UT
| | - Ken M. Kosak
- 2Univ. of Utah Huntsman Cancer Inst., Salt Lake City, UT
| | | | | | | | | | - James N. Herron
- 1Univ. of Utah Department of Pharmaceutics and Pharmaceutical Chemistry, Salt Lake City, UT
| | - Paul J. Shami
- 2Univ. of Utah Huntsman Cancer Inst., Salt Lake City, UT
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Chauhan PS, Kaur I, Dogra S, De D, Kanwar AJ. Narrowband ultraviolet B versus psoralen plus ultraviolet A therapy for severe plaque psoriasis: an Indian perspective. Clin Exp Dermatol 2011; 36:169-73. [DOI: 10.1111/j.1365-2230.2010.03874.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Yadav S, Dogra S, Kaur I. An unusual anatomical colocalization of alopecia areata and vitiligo in a child, and improvement during treatment with topical prostaglandin E2. Clin Exp Dermatol 2010; 34:e1010-1. [PMID: 20055821 DOI: 10.1111/j.1365-2230.2009.03677.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mahajan R, Kaur I, Kanwar AJ. Methotrexate/narrowband UVB phototherapy combination vs. narrowband UVB phototherapy in the treatment of chronic plaque-type psoriasis - a randomized single-blinded placebo-controlled study. J Eur Acad Dermatol Venereol 2010; 24:595-600. [DOI: 10.1111/j.1468-3083.2009.03486.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kaur I, Kosak KM, Saavedra JE, Keefer LK, Kern SE, Shami PJ. Abstract 2651: Cellular uptake and stability studies of the nitric oxide-generating pro-drug JS-K. Cancer Res 2010. [DOI: 10.1158/1538-7445.am10-2651] [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
The nitric oxide (NO) prodrug O2-(2,4-dinitrophenyl)1-[(4-ethoxycarbonyl)piperazin-1-yl]diazen-1-ium-1,2-diolate, or JS-K, has potent antineoplastic activity in vitro and in vivo. Potential targets of JS-K include acute myeloid leukemia, multiple myeloma, hepatocellular carcinoma, prostate cancer and non-small cell lung cancer. JS-K is sparingly soluble in aqueous media. Preliminary pharmacokinetic studies have shown that JS-K has a short half-life in vivo. We have developed a nanoscale micelle formulation for JS-K using Pluronic® P123 polymers. Pluronics® are polyethylene oxide / polypropylene oxide copolymers that are non-toxic and non-irritant. This formulation prolongs the half-life of JS-K in biologic media in vitro. The purpose of this study was to determine the effect of the P123 Pluronic® formulation on the cellular distribution of JS-K. We compared micelle-solubilized JS-K to free JS-K using the HL-60 human myeloid leukemia cell line. JS-K was added at a concentration of 50 μM to HL-60 cells incubated at 37°C in phosphate buffered saline (PBS), RPMI-1640 with 10% fetal bovine serum (FBS), or PBS with 10% FBS. JS-K recovery from the nuclei and cytoplasm was measured using High Pressure Liquid Chromatography (HPLC). In all experiments, cellular uptake of P123-formulated JS-K was greater than that of free JS-K. The highest levels of recovery of P123-formulated JS-K were from nuclei. Indeed, recovery of JS-K from the cytoplasm was minimal. When cells were incubated in PBS, the percent recovery of free JS-K from nuclei at 15, 30, 60 and 120 minutes was 5.03+2.41; 5.00+2.77, 10.83+5.32 and 0.58+0.22, respectively. Under the same conditions and at the same time points, the percent recovery of P123-formulated JS-K was 9.05+3.5, 20.00+7.07, 21.15+3.14 and 27.73+4.30, respectively (average of two different experiments; P<0.05). When cells were incubated in PBS/10%FBS, the percent recovery of free JS-K from nuclei at 30, 60, 120 and 240 minutes was 3.55+1.92, 3.15+ 1.37, 2.13+1.08, and 1.83+1.55, respectively. Under the same conditions and at the same time points, the percent recovery of P123-formulated JS-K was 20.74+6.57, 12.70+3.41, 16.03+3.59, and 13.22+1.55, respectively (average of three different experiments; P<0.05). When cells were incubated in RPMI/10%FBS, the percent recovery of free JS-K from nuclei at 15, 30, 60, and 120 minutes was 0.38+0.15, 0.45+0.20, 0.43+0.22, and 0.2+0.09, respectively. Under the same conditions and at the same time points, the percent recovery of P123-formulated JS-K was 2.93+1.43, 4.68+1.40, 9.30+1.37 and 11.90+3.81, respectively (average of two different experiments; P<0.05). We conclude that a Pluronic® P123 formulation increases the stability of JS-K in biologic media and facilitates penetration of the drug into the nucleus. This clinically useful formulation could therefore enhance the cytotoxic effects of JS-K and increase its therapeutic efficacy.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 101st Annual Meeting of the American Association for Cancer Research; 2010 Apr 17-21; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2010;70(8 Suppl):Abstract nr 2651.
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Affiliation(s)
- Imit Kaur
- 1University of Utah - Department of Pharmaceutics and Pharmaceutical Chemistry, Salt Lake City, UT
| | - Ken M. Kosak
- 2University of Utah - Huntsman Cancer Institute, Salt Lake City, UT
| | | | | | - Steven E. Kern
- 1University of Utah - Department of Pharmaceutics and Pharmaceutical Chemistry, Salt Lake City, UT
| | - Paul J. Shami
- 2University of Utah - Huntsman Cancer Institute, Salt Lake City, UT
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Puri M, Kaur I, Kanwar R, Gupta R, Chauhan A, Kanwar J. Ribosome Inactivating Proteins (RIPs) from Momordica charantia for Anti Viral Therapy. Curr Mol Med 2009; 9:1080-94. [DOI: 10.2174/156652409789839071] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Accepted: 04/21/2009] [Indexed: 11/22/2022]
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Singh I, Verma A, Kaur I, Bharadwaj LM, Bhatia V, Jain VK, Bhatia CS, Bhatnagar PK, Mathur PC. The effect of length of single-walled carbon nanotubes (SWNTs) on electrical properties of conducting polymer-SWNT composites. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/polb.21847] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Goyal R, Singh NP, Kumar A, Kaur I, Singh M, Sunita N, Mathur M. SIMPLE AND ECONOMICAL METHOD FOR SPECIATION AND RESISTOTYPING OF CLINICALLY SIGNIFICANT COAGULASE NEGATIVE STAPHYLOCOCCI. Indian J Med Microbiol 2006. [DOI: 10.1016/s0255-0857(21)02350-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Goyal R, Singh NP, Kumar A, Kaur I, Singh M, Sunita N, Mathur M. Simple and economical method for speciation and resistotyping of clinically significant coagulase negative staphylococci. Indian J Med Microbiol 2006; 24:201-4. [PMID: 16912440] [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: 05/11/2023]
Abstract
An attempt was made to speciate 102 clinically significant isolates of coagulase negative staphylococci (CoNS) by a practical scheme adapted from various references. This scheme utilizes slide and tube coagulase test, urease test ornithine decarboxylase, novobiocin susceptibility and aerobic acid from mannose for assigning species group. Inclusion of one or two additional tests in a species group could identify the isolates to species level. Ninety eight (97%) isolates were conveniently identified as S. epidermidis (41%), S. saprophyticus (16.6%), S. haemolyticus (14.7%), S. hominis (14.7%), S. lugdunensis (4.9%), S. schleiferi (1.9%) and S. capitis (1.9%). Only four isolates were not identified to the species level, two of which were probably S. capitis subspecies ureolyticus / S. warneri / S. simulans . Antibiotic susceptibility testing showed maximum resistance to ampicillin (89%) followed by cefotaxime (59%) with no resistance to vancomycin. The increasing recognition of pathogenic potential of CoNS and emergence of drug resistance amongst them denotes the need to adopt simple laboratory procedures to identify and understand the diversity of staphylococci isolated from clinical material.
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Affiliation(s)
- R Goyal
- Department of Microbiology, University College of Medical Sciences and GTB Hospital, New Delhi - 110 095, India.
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