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Siva N, Phagdol T, S Nayak B, Glane Mathias E, Edward S Lewis L, Velayudhan B, Shankar N R, D'Souza P. Stress and stressors experienced by the parents of high-risk neonates admitted in neonatal intensive care unit: Systematic review and meta-analysis evidence available from India. Stress Health 2024; 40:e3301. [PMID: 37596955 DOI: 10.1002/smi.3301] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/12/2023] [Accepted: 07/26/2023] [Indexed: 08/21/2023]
Abstract
The aim of the systematic review and meta-analysis is to determine the stress and stressors experienced by the parents of high-risk neonates admitted to the neonatal intensive care unit (NICU) in India. We included both quantitative and qualitative studies. The Joanna Briggs Institute Critical Appraisal Checklist and Critical Appraisal Skill Programme checklist were used to assess the quality of included studies. A systematic search was conducted in PubMed, EMBASE, SCOPUS, EBSCOhost, Web of Science, ProQuest, Microsoft Academic, DOAJ, Indian Citation Index, and J-Gate to identify relevant studies. Additionally, online hand searching was performed on Indian websites of relevant institutions, women and child health departments, repositories, registries, and paediatric journals. Twelve of the 21 quantitative studies found that maternal stress was higher than fathers due to the separation from their babies and the medical condition of the neonate. One qualitative study reported that financial burden, alterations in the parenting role, and concern over domestic issues are significant causes of fathers' stress. A meta-analysis of the included studies assessed the prevalence of maternal, paternal, and parental stress and reported that mothers experienced higher stress levels than fathers across all subscales. The most typical stressors for parents were changes in neonatal looks, behaviour, and altered parental roles. Beyond the immediate NICU care and interactions, other triggering factors of stress among parents must be considered to design multicomponent interventions in a local (Indian) context. Moreover, parental psychological support and regular counselling can be incorporated into the standard neonatal intensive care policy.
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Affiliation(s)
- N Siva
- Department of Child Health Nursing, Manipal College of Nursing, Manipal Academy of Higher Education, Manipal, India
| | - Tenzin Phagdol
- Department of Child Health Nursing, Manipal College of Nursing, Manipal Academy of Higher Education, Manipal, India
| | - Baby S Nayak
- Department of Child Health Nursing, Manipal College of Nursing, Manipal Academy of Higher Education, Manipal, India
| | - Edlin Glane Mathias
- Public Health Evidence South Asia, Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, India
| | - Leslie Edward S Lewis
- Department of Pediatrics, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Binil Velayudhan
- Department of Mental Health Nursing, Manipal College of Nursing, Manipal Academy of Higher Education, Manipal, India
| | - Ravi Shankar N
- Department of Biostatistics, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India
| | - Preethy D'Souza
- Social Research Institute, UCL Institute of Education, University College London, London, UK
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Siva N, Nayak BS, Lewis LES, Velayudhan B, Shenoy RP, Phaneendra M, Shankar R. Randomized Controlled Trial on the Effect of the Neonatal Nurse Navigator Program on Maternal Stress and Neonatal Cortisol Levels. J Obstet Gynecol Neonatal Nurs 2024; 53:185-196. [PMID: 38134967 DOI: 10.1016/j.jogn.2023.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 11/09/2023] [Accepted: 11/16/2023] [Indexed: 12/24/2023] Open
Abstract
OBJECTIVE To assess the effect of the Neonatal Nurse Navigator Program (NNNP) compared to usual care on maternal stress and neonatal salivary cortisol level (SCL) in the NICU. DESIGN Randomized control trial. SETTING NICU in a tertiary health care hospital in Manipal, Udupi District, Karnataka, India. PARTICIPANTS Neonates between 34 and 36 weeks gestation and their mothers (N = 120 dyads). METHODS We used block randomization to assign dyads to the intervention or control group. We measured maternal stress using the Parental Stress Scale: Neonatal Intensive Care Unit, and we estimated neonatal stress by measuring SCLs within 24 hours of NICU admission and before discharge from the unit. We conducted a descriptive analysis on participant characteristics and reported maternal stress levels using means and standard deviations. We used the analysis of covariance change score test to determine the difference in maternal and neonatal stress levels between the intervention and control groups. RESULTS The NNNP group exhibited significantly lower maternal stress scores before discharge than the control group, and we observed reductions across all three subscales of the Parental Stress Scale: Neonatal Intensive Care Unit. Mean neonatal salivary cortisol levels were significantly lower in the interventional group than in the control group, F(1.117) = 24.03, 95% confidence interval [7.9, 18.6], p < .001. CONCLUSION Use of the NNNP reduced maternal stress SCLs in high-risk neonates by actively engaging mothers in the care of their neonates in the NICU. We recommend adoption of the NNNP model as a standard care policy in NICUs throughout India.
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Iqbal F, Lewis LES, Siva N, K E V, Purkayastha J, Shenoy PA. Modulation of gut microbiota: An emerging consequence in neonatal sepsis. Clinical Epidemiology and Global Health 2023. [DOI: 10.1016/j.cegh.2023.101245] [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: 02/01/2023] Open
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Rajagopalan S, Siva N, Novak A, Garavaglia J, Jelsema C. Safety and efficacy of peripheral nerve blocks to treat refractory headaches after aneurysmal subarachnoid hemorrhage - A pilot observational study. Front Neurol 2023; 14:1122384. [PMID: 37153680 PMCID: PMC10158792 DOI: 10.3389/fneur.2023.1122384] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 03/20/2023] [Indexed: 05/10/2023] Open
Abstract
Objectives Headache after aneurysmal subarachnoid hemorrhage (HASH) is common, severe, and often refractory to conventional treatments. Current treatment standards include medications including opioids, until the pain is mitigated. Peripheral nerve blocks (PNBs) may be an effective therapeutic option for HASH. We conducted a small before-and-after study of PNBs to determine safety, feasibility, and efficacy in treatment of HASH. Methods We conducted a pilot before-and-after observational study and collected data for 5 patients in a retrospective control group and 5 patients in a prospective intervention PNB group over a 12-month period. All patients received a standard treatment of medications including acetaminophen, magnesium, gabapentin, dexamethasone and anti-spasmodics or anti-emetics as needed. Patients in the intervention group received bilateral greater occipital, lesser occipital, and supraorbital PNBs in addition to medications. The primary outcome was pain severity, measured by Numeric pain rating scale (NPRS). All patients were followed for 1 week following enrollment. Results The mean ages in the PNB group and control group were 58.6 and 57.4, respectively. One patient in the control group developed radiographic vasospasm. Three patients in both groups had radiographic hydrocephalus and IVH, requiring external ventricular drain (EVD) placement. The PNB group had an average reduction in mean raw pain score of 2.76 (4.68, 1.92 p = 0.024), and relative pain score by 0.26 (0.48, 0.22 p = 0.026), compared to the control group. The reduction occurred immediately after PNB administration. Conclusion PNB can be a safe, feasible and effective treatment modality for HASH. Further investigations with a larger sample size are warranted.
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Affiliation(s)
- Swarna Rajagopalan
- Department of Neurology, Cooper Medical School of Rowan University, Camden, NJ, United States
- *Correspondence: Swarna Rajagopalan,
| | - Nanda Siva
- West Virginia University School of Medicine, Morgantown, WV, United States
| | - Andrew Novak
- Department of Neurology, West Virginia University School of Medicine, Morgantown, WV, United States
| | - Jeffrey Garavaglia
- Department of Pharmacy, West Virginia University School of Medicine, Morgantown, WV, United States
| | - Casey Jelsema
- Department of Statistics and Data Analytics, Sandia National Laboratories, Albuquerque, NM, United States
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Siva N, Koirala M, Raiker R, Waris S, Pakhchanian H, Puckett Y. Evaluation of trends in breast cancer–related content on TikTok. J Clin Oncol 2022. [DOI: 10.1200/jco.2022.40.16_suppl.11046] [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: 11/20/2022] Open
Abstract
11046 Background: Social media plays an important role in disseminating information to patients. It is important to investigate the healthcare content on popular platforms to understand the material consumed by patients that may influence their medical decision making. TikTok has over 1 billion monthly active subscribers and has become common ground to communicate healthcare information, including that of breast cancer. This study aims to provide an analysis of breast-cancer related information on TikTok. Methods: The most popular TikTok hashtag related to breast cancer was identified, and the top videos were gathered on January 23, 2022. Data was collected to reach a target of 100 videos. Exclusion criteria were non-English videos, repeated videos, or upload of movie/tv clip without educational info. The video source was characterized based on healthcare role, gender, and race. Healthcare provider was defined as an individual with a professional medical degree (MD, PA, RN, other). The videos were categorized into patient experience, educational, advertisement, and other. Specific content components, including chemotherapy, surgical intervention, mammogram, and self-breast exam, were tracked. Results: The hashtag “#breastcancer” was identified as the most popular, with 773.8 million views. The videos had a combined 258,886,300 views, 31,573,400 likes, 413,604 shares, and 567,520 comments. Of the 100 videos analyzed, 91 were uploaded by a layperson, 2 by a healthcare professional, and 7 by a company. The healthcare professionals consisted of one OB/GYN and one general surgeon. The racial designations of the main subjects in the videos were 87.2% White, 3.2% Black, 2.1% Hispanic, 4.3% Asian, and 3.2% undetermined. Content categorization revealed 81% patient experience, 22% educational, 6% advertisement, and 8% other. The major topics presented in the videos related to surgical treatment (39%), chemotherapy (37%), and radiation treatment (2%). Conclusions: An overwhelming majority of breast cancer related information on TikTok was not presented by qualified healthcare professionals and exhibited a lack of cultural diversity and inclusivity.[Table: see text]
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Affiliation(s)
- Nanda Siva
- West Virginia University School of Medicine, Morgantown, WV
| | - Monika Koirala
- Kansas City University College of Osteopathic Medicine, Kansas City, MO
| | - Rahul Raiker
- West Virginia University School of Medicine, Morgantown, WV
| | - Shanawar Waris
- West Virginia University School of Medicine, Morgantown, WV
| | - Haig Pakhchanian
- George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Yana Puckett
- West Virginia University School of Medicine, Morgantown, WV
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Waris S, Raiker R, Siva N, Koirala M, Pakhchanian H, Boustany O, Khalid AA. Estimating patient demand for oncologists in the United States using Google trends. J Clin Oncol 2022. [DOI: 10.1200/jco.2022.40.16_suppl.e18535] [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: 11/20/2022] Open
Abstract
e18535 Background: Cancer accounts for a massive burden of global disease, healthcare expenditure, and is one of the leading causes of death worldwide, accounting for approximately 1 in 6 deaths. As both the incidence and prevalence of cancer continue to increase, along with the percentage of the population over the age of 65, it is important to understand patient demand for oncologists. Previous studies have predicted a shortage of over two thousand oncologists by 2025. The inconsistencies between supply and demand for oncologists require analysis and supervision to identify potential gaps in oncological care and fulfill patient demand for quality care. Methods: The average relative search volume (RSV) for the term “oncologist” was determined by analyzing Google Trends from 2004-2019 for each state. The oncologist per capita values were computed by taking the number of oncologists per state and then dividing by the corresponding 2019 Census estimates. The RSV values were then divided by per capita values to quantify demand index and standardized to generate a relative demand index (RDI). A spearman’s rho correlation test was also conducted to assess the relationship between RDI and overall 2019 state health rankings as conducted by the America’s Health Rankings group. Results: The states with highest RSV was New Jersey (100), Florida/Tennessee (98), and Connecticut (97), while the lowest RSV were Oregon (53), Alaska (44), and Vermont (41). The RDI for oncologists was greatest in Idaho (100), Mississippi (86), and Arkansas (77) while the lowest were for Vermont (15), Massachusetts (14), and District of Columbia (8). Spearman’s rho test revealed a strong negative relationship between RDI and overall state health ranking that was statistically significant (rs= -0.6363, p < 0.001). Conclusions: These trends may give us a preliminary idea of states that have unmet healthcare needs in oncology. Further studies are warranted.
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Affiliation(s)
- Shanawar Waris
- West Virginia University School of Medicine, Morgantown, WV
| | - Rahul Raiker
- West Virginia University School of Medicine, Morgantown, WV
| | - Nanda Siva
- West Virginia University School of Medicine, Morgantown, WV
| | - Monika Koirala
- Kansas City University College of Osteopathic Medicine, Kansas City, MO
| | - Haig Pakhchanian
- George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Osama Boustany
- West Virginia University School of Medicine, Morgantown, WV
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Braggio D, Koller D, Jin F, Siva N, Zewdu A, Lopez G, Batte K, Casadei L, Welliver M, Strohecker AM, Lev D, Pollock RE. Autophagy inhibition overcomes sorafenib resistance in S45F-mutated desmoid tumors. Cancer 2019; 125:2693-2703. [PMID: 30980399 DOI: 10.1002/cncr.32120] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 12/18/2018] [Revised: 02/06/2019] [Accepted: 02/14/2019] [Indexed: 11/06/2022]
Abstract
BACKGROUND Desmoid tumors (DTs) are rare and understudied fibroblastic lesions that are frequently recurrent and locally invasive. DT patients often experience chronic pain, organ dysfunction, decrease in quality of life, and even death. METHODS Sorafenib has emerged as a promising therapeutic strategy, which has led to the first randomized phase 3 clinical trial devoted to DTs. Concurrently, we conducted a comprehensive analysis of sorafenib efficacy in a large panel of desmoid cell strains to probe for response mechanism. RESULTS We found distinctive groups of higher- and lower-responder cells. Clustering the lower-responder group, we observed that CTNNB1 mutation was determinant of outcome. Our results revealed that a lower dose of sorafenib was able to inhibit cell viability, migration, and invasion of wild-type and T41A-mutated DTs. Apoptosis induction was observed in those cells after treatment with sorafenib. On the other hand, the lower dose of sorafenib was not able to inhibit cell viability, migration, or invasion or to induce apoptosis in the S45F-mutated DTs. The investigation of autophagy showed the dependency of S45F-mutated DTs on this pathway as a part of cell survival mechanism. Significantly, when autophagy was inhibited genetically or pharmacologically in the S45F mutant cell strains, sensitivity to sorafenib was restored. CONCLUSIONS Our findings suggest that the response to sorafenib differs when comparing S45F-mutated DTs and T41A-mutated or wild-type DTs. Furthermore, the combination of hydroxychloroquine and sorafenib enhances the antiproliferative and proapoptotic effects in S45F-mutated DT cells, suggesting that profiling β-catenin status could guide clinical management of desmoid patients who are considering sorafenib treatment.
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Affiliation(s)
- Danielle Braggio
- Program in Translational Therapeutics, The James Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio.,Department of Surgery, The Ohio State University, Columbus, Ohio
| | - David Koller
- Program in Translational Therapeutics, The James Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio.,Department of Surgery, The Ohio State University, Columbus, Ohio
| | - Feng Jin
- Department of Radiation Oncology, The Ohio State University, Columbus, Ohio
| | - Nanda Siva
- Department of Chemical and Biomedical Engineering, West Virginia University Statler College of Engineering and Mineral Resources, Morgantown, West Virginia
| | - Abeba Zewdu
- Program in Translational Therapeutics, The James Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio.,Department of Surgery, The Ohio State University, Columbus, Ohio
| | - Gonzalo Lopez
- Program in Translational Therapeutics, The James Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio.,Department of Surgery, The Ohio State University, Columbus, Ohio
| | - Kara Batte
- Program in Translational Therapeutics, The James Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio.,Department of Surgery, The Ohio State University, Columbus, Ohio
| | - Lucia Casadei
- Program in Translational Therapeutics, The James Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio.,Department of Surgery, The Ohio State University, Columbus, Ohio
| | - Meng Welliver
- Department of Radiation Oncology, The Ohio State University, Columbus, Ohio
| | - Anne M Strohecker
- Department of Surgery, The Ohio State University, Columbus, Ohio.,Program in Molecular Biology and Cancer Genetics, The James Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio.,Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, Ohio
| | - Dina Lev
- Department of General Surgery B, Sheba Medical Center, Tel Aviv, Israel.,Tel Aviv University, Tel Aviv, Israel
| | - Raphael E Pollock
- Program in Translational Therapeutics, The James Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio.,Department of Surgery, The Ohio State University, Columbus, Ohio
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Siva N, Huffman H, Chaparro A, Palmer E. Visual Search for MILSTD 2525 Glyphs. J Vis 2014. [DOI: 10.1167/14.10.929] [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: 11/24/2022] Open
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Miranda A, Siva N, Palmer E. Non-Monetary Attentional Capture. J Vis 2012. [DOI: 10.1167/12.9.6] [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: 11/24/2022] Open
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Siva N. Deaths at UK immigration detention centres prompt concerns about inadequate healthcare. West J Med 2011. [DOI: 10.1136/bmj.d5172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Siva N. Sri Lankan government knowingly shelled hospitals, says UN report. West J Med 2011. [DOI: 10.1136/bmj.d2759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Siva N. Concern grows for pregnant women and newborns in Pakistan. West J Med 2010. [DOI: 10.1136/bmj.c4644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Siva N. Scottish emergency departments struggle under increased pressure. West J Med 2010. [DOI: 10.1136/bmj.c4499] [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: 11/03/2022]
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Siva N. UK is to open recovery centres for injured soldiers. West J Med 2010. [DOI: 10.1136/bmj.c947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Siva N. UK health professionals unite to combat climate change. West J Med 2009. [DOI: 10.1136/bmj.b5385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Siva N. Top UCLA surgeon is demoted after failing to disclose conflicts of interests. West J Med 2009. [DOI: 10.1136/bmj.b3071] [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: 11/03/2022]
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Siva N. Doctors say that the Tamil Tigers forced them to lie. West J Med 2009. [DOI: 10.1136/bmj.b2873] [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: 11/03/2022]
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Siva N. "Human right to health" needs clarifying, experts agree. West J Med 2009. [DOI: 10.1136/bmj.b2059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Siva N. UN chief and global aid agencies call for truce in Sri Lanka. West J Med 2009. [DOI: 10.1136/bmj.b1540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Siva N. Most disputes between insurers and doctors relate to incorrect coding, conference hears. West J Med 2009. [DOI: 10.1136/bmj.b1333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
Following right hemisphere stroke, many patients display an indifference to objects and events in the left side of the world ('neglect'). Here, we describe a new technique that might help accelerate recovery from neglect. The patient sits at a table and a mirror is propped vertically on the patient's right side in the parasagittal plane, so that when the patient rotates his head rightward and looks into the mirror, he sees the neglected side of the world reflected in the mirror. Our question was: since the sensory information was now coming from the non-neglected left side, would this somehow make him overcome the neglect? In pilot experiments, two types of responses were seen: (a) In one subset of patients the presence of the mirror seemed to enhance the patients' awareness of the neglected field, so that they reached correctly for an object that was shown in the neglected field. Will repeated practice with this task accelerate recovery from neglect? (b) The second group of patients kept reaching into the mirror to grasp the reflection or kept groping behind the mirror ('mirror agnosia'). If the mirror was placed in the coronal position and the object placed behind their head, then some of these patients (from group B) reached correctly for the object. Quite apart from its obvious theoretical implications, we believe this technique might provide a new approach for the treatment of visual hemineglect.
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Affiliation(s)
- V S Ramachandran
- Brain and Perception Laboratory, Center for Research on Brain and Cognition, UCSD La Jolla, CA 92093-0109, USA.
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Kalled SL, Siva N, Stein H, Reinherz EL. The distribution of CD10 (NEP 24.11, CALLA) in humans and mice is similar in non-lymphoid organs but differs within the hematopoietic system: absence on murine T and B lymphoid progenitors. Eur J Immunol 1995; 25:677-87. [PMID: 7705396 DOI: 10.1002/eji.1830250308] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Prior studies in the human have implied an important function for CD10 (CALLA, neutral endopeptidase 24.11) in early lymphoid development. To examine the role of this ectoenzyme in an experimental system, a rat mAb specific for mouse CD10, termed R103, was generated. Immunohistological and flow cytometric analyses indicate that the distribution of CD10 in non-lymphoid anatomical compartments is virtually identical in human and mouse. However, CD10 expression within the hematopoietic system is strikingly different. In contrast to human spleen, lymph node and thymus, the corresponding mouse organs contain no detectable CD10+ cells. Mouse granulocytes, unlike human granulocytes, also lack CD10 expression. Five-color flow cytometric studies of adult bone marrow (BM) from C57BL/6 and BALB/c mice with mAb specific for CD43, B220, HSA, BP-1 and immunoglobulin M fail to detect any significant number of CD10+ cells at pro-B, pre-B or B cell stages. In addition, lymphoid cells in both (rIL-7) independent and rIL-7-dependent in vitro pro-B cell cultures lack CD10 expression. Consistent with this result, CD10 mRNA is not detected. Unlike the AA4.1+ population from day 13 and 14 fetal liver, the CD10+ subset is unable to reconstitute T and B lymphoid compartments in RAG-2-/- mice. Nevertheless, mouse CD10 is readily found on BM stromal elements known to support early B lineage lymphoid development. Given the common expression of CD10 on human and mouse BM stromal elements, this enzyme may have an important function in the stromal cell-dependent phase of hematopoiesis.
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Affiliation(s)
- S L Kalled
- Laboratory of Immunobiology, Dana-Farber Cancer Institute, Boston, MA 02115, USA
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