1
|
Pal R, Rudas A, Kim S, Chiang J, Cannesson M. A signal processing tool for extracting features from arterial blood pressure and photoplethysmography waveforms. medRxiv 2024:2024.03.14.24304307. [PMID: 38559005 PMCID: PMC10980118 DOI: 10.1101/2024.03.14.24304307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Arterial blood pressure (ABP) and photoplethysmography (PPG) waveforms contain valuable clinical information and play a crucial role in cardiovascular health monitoring, medical research, and managing medical conditions. The features extracted from PPG waveforms have various clinical applications ranging from blood pressure monitoring to nociception monitoring, while features from ABP waveforms can be used to calculate cardiac output and predict hypertension or hypotension. In recent years, many machine learning models have been proposed to utilize both PPG and ABP waveform features for these healthcare applications. However, the lack of standardized tools for extracting features from these waveforms could potentially affect their clinical effectiveness. In this paper, we propose an automatic signal processing tool for extracting features from ABP and PPG waveforms. Additionally, we generated a PPG feature library from a large perioperative dataset comprising 17,327 patients using the proposed tool. This PPG feature library can be used to explore the potential of these extracted features to develop machine learning models for non-invasive blood pressure estimation.
Collapse
Affiliation(s)
- R. Pal
- David Geffen School of Medicine at University of California Los Angeles
| | - A. Rudas
- Department of Computational Medicine, University of California Los Angeles
| | - S. Kim
- David Geffen School of Medicine at University of California Los Angeles
| | - J.N. Chiang
- Department of Neurosurgery and Computational Medicine, University of California Los Angeles
| | - M. Cannesson
- David Geffen School of Medicine at University of California Los Angeles
| |
Collapse
|
2
|
Hupf E, Kleemiss F, Borrmann T, Pal R, Krzeszczakowska JM, Woinska M, Jayatilaka D, Genoni A, Grabowsky S. The Effects of Experimentally Obtained Electron Correlation and Polarization on Electron Densities and Exchange-Correlation Potentials . J Chem Phys 2023; 158:124103. [PMID: 37003723 DOI: 10.1063/5.0138312] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023] Open
Abstract
In X-ray constrained wavefunction (XCW) fitting, external information such as electron correlation and polarization are included into a single-determinantal isolated-molecule wavefunction. In a first step, we show that the extraction of these two physical effects by XCW fitting is complete and accurate by comparing to theoretical reference calculations. In a second step, we show that fitting to data from single-crystal X-ray diffraction measurements provides the same results qualitatively and how the physical effects can be separated, although always inherently convolved in the experiment. We further demonstrate that exchange-correlation potentials are systematically affected by XCW fitting in a physically meaningful way which could be exploited for method development in quantum chemistry, subject to some remaining challenges that we also outline.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Dylan Jayatilaka
- School of Chemistry and Biochemistry, University of Western Australia, Nedlands 6009. Australia, Australia
| | - Alessandro Genoni
- Laboratory of Theoretical Physics and Chemistry, Université de Lorraine - Campus du Technopôle, France
| | - Simon Grabowsky
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Switzerland
| |
Collapse
|
3
|
Sarkar S, Sahoo P, Mistry T, Pal R, Ghosh S, Choudhury T, Mahata S, Vernekar M, Bera T, Mukherjee K, Nath P, Nasare V. 187P BUB1 (2530C>T) polymorphism and expression affects chemotherapy response and predicts poor prognosis in advanced epithelial ovarian cancer. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.10.223] [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: 12/05/2022] Open
|
4
|
Pal R, Jelsch C, Momma K, Grabowsky S. π-Hole bonding in a new co-crystal hydrate of gallic acid and pyrazine: static and dynamic charge density analysis. Acta Crystallogr B Struct Sci Cryst Eng Mater 2022; 78:231-246. [PMID: 35411861 PMCID: PMC9004022 DOI: 10.1107/s2052520622001457] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
A new cocrystal hydrate of gallic acid with pyrazine (4GA, Py, 4H2O; GA4PyW4) was obtained and characterized by single crystal X-ray diffraction. In addition to structure determination, experimental charge density analysis was carried out in terms of Multipole Modelling (MP), X-ray wavefunction refinement (XWR) and maximum entropy method (MEM). As a part of XWR, the structural refinement via Hirshfeld atom refinement was carried out and resulted in O-H bond lengths close to values from neutron diffraction. A systematic comparison of molecular conformations and aromatic interactions in this new cocrystal hydrate was performed with other existing polymorphs of gallic acid. In GA4PyW4, the two symmetry-independent gallic acid molecules have a syn COOH orientation and form the common (COOH)2 dimeric synthon. The carboxyl C atom displays the characteristics of π-holes with electropositive regions above and below the molecular plane and engages in acceptor-donor interactions with oxygen atoms of acidic O-H groups and phenol groups of neighbouring gallic acid molecules. The signature of the π-hole was identified from experimental charge density analysis, both in static density maps in MP and XWR as well as dynamic density in MEM, but it cannot be pinned down to a specific atom-atom interaction. This study presents the first comparison between an XWR and a MEM experimental electron-density determination.
Collapse
Affiliation(s)
- Rumpa Pal
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
- Institute of Inorganic Chemistry and Crystallography, Department 2 – Biology/Chemistry, University of Bremen, Leobener Str. 3, 28359 Bremen, Germany
| | | | - Koichi Momma
- National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki, Japan
| | - Simon Grabowsky
- Institute of Inorganic Chemistry and Crystallography, Department 2 – Biology/Chemistry, University of Bremen, Leobener Str. 3, 28359 Bremen, Germany
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| |
Collapse
|
5
|
Pal R, Jayatilaka D, Nishibori E. Structure Factors and Charge Density Description of Aluminum: A Quantum Crystallographic Study. J Phys Chem A 2022; 126:2042-2049. [PMID: 35316043 DOI: 10.1021/acs.jpca.1c10730] [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: 11/28/2022]
Abstract
Static structure factors and charge density for metallic aluminum were investigated by periodic calculations using atom-centered Gaussian-type basis sets with the Perdew-Burke-Ernzerhof (PBE) functional implemented in the CRYSTAL14 package and X-ray constrained wave function (XCW) fitting. The effects of additional diffuse d and f basis functions on structure factors were compared with synchrotron powder X-ray diffraction and quantitative convergent electron beam diffraction data. Changes in structure factors from an independent atom model at 022, 113, and 222 reflections introduced d and f basis functions similar to those of the experimental data. The XCW fitting was applied to different sizes of aluminum clusters. The charge density features for a 50-atom cluster clearly demonstrated electron accumulation at tetrahedral sites and electron depletion at octahedral sites. The resolution dependence of the XCW study suggests that structure factors of the five lowest resolution reflections with 0.1% accuracy were indispensable for determining the detailed bonding description in the case of metallic aluminum.
Collapse
Affiliation(s)
- Rumpa Pal
- Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Dylan Jayatilaka
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Perth, Washington 6009, Australia
| | - Eiji Nishibori
- Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.,Tsukuba Research Center for Energy Materials Science, University of Tsukuba, Tsukuba 305-8571, Japan
| |
Collapse
|
6
|
Appiarius Y, Gliese PJ, Segler SAW, Rusch P, Zhang J, Gates PJ, Pal R, Malaspina LA, Sugimoto K, Neudecker T, Bigall NC, Grabowsky S, Bakulin AA, Staubitz A. BN-Substitution in Dithienylpyrenes Prevents Excimer Formation in Solution and in the Solid State. J Phys Chem C Nanomater Interfaces 2022; 126:4563-4576. [PMID: 35299818 PMCID: PMC8919264 DOI: 10.1021/acs.jpcc.1c08812] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/20/2021] [Indexed: 06/14/2023]
Abstract
Boron-nitrogen substitutions in polycyclic aromatic hydrocarbons (PAHs) have a strong impact on the optical properties of the molecules due to a significantly more heterogeneous electron distribution. However, besides these single-molecule properties, the observed optical properties of PAHs critically depend on the degree of intermolecular interactions such as π-π-stacking, dipolar interactions, or the formation of dimers in the excited state. Pyrene is the most prominent example showing the latter as it exhibits a broadened and strongly bathochromically shifted emission band at high concentrations in solution compared to the respective monomers. In the solid state, the impact of intermolecular interactions is even higher as it determines the crystal packing crucially. In this work, a thiophene-flanked BN-pyrene (BNP) was synthesized and compared with its all-carbon analogue (CCP) in solution and in the solid state by means of crystallography, NMR spectroscopy, UV-vis spectroscopy, and photoluminescence (PL) spectroscopy. In solution, PL spectroscopy revealed the solvent-dependent presence of excimers of CCP at high concentrations. In contrast, no excimers were found in BNP. Clear differences were also observed in the single-crystal packing motifs. While CCP revealed overlapped pyrene planes with centroid distances in the range of classical π-stacking interactions, the BNP scaffolds were displaced and significantly more spatially separated.
Collapse
Affiliation(s)
- Yannik Appiarius
- Institute
for Analytical and Organic Chemistry, University
of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- MAPEX
Center for Materials and Processes, University
of Bremen, Bibliothekstraße
1, D-28359 Bremen, Germany
| | - Philipp J. Gliese
- Institute
for Analytical and Organic Chemistry, University
of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- MAPEX
Center for Materials and Processes, University
of Bremen, Bibliothekstraße
1, D-28359 Bremen, Germany
| | - Stephan A. W. Segler
- Institute
for Analytical and Organic Chemistry, University
of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- MAPEX
Center for Materials and Processes, University
of Bremen, Bibliothekstraße
1, D-28359 Bremen, Germany
| | - Pascal Rusch
- Institute
of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstraße 3a, D-30167 Hannover, Germany
- Cluster
of Excellence PhoenixD (Photonics, Optics, and Engineering—Innovation
Across Disciplines), Leibniz University
Hannover, D-30167 Hannover, Germany
| | - Jiangbin Zhang
- Cavendish
Laboratory, University of Cambridge, 19 J J Thomson Avenue, CB3 0HE Cambridge, U.K.
- College of
Advanced Interdisciplinary Studies, National
University of Defense Technology, 410073 Changsha, Hunan, China
| | - Paul J. Gates
- School
of Chemistry, University of Bristol, Cantock’s Close, BS8 1TS Bristol, U.K.
| | - Rumpa Pal
- Institute
of Inorganic Chemistry and Crystallography, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
| | - Lorraine A. Malaspina
- Institute
of Inorganic Chemistry and Crystallography, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- Department
of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Kunihisa Sugimoto
- Japan Synchrotron
Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Hyogo 679-5198, Japan
| | - Tim Neudecker
- MAPEX
Center for Materials and Processes, University
of Bremen, Bibliothekstraße
1, D-28359 Bremen, Germany
- Institute for Physical and Theoretical
Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- Bremen Center for Computational Materials
Science, University of Bremen, Am Fallturm 1, D-28359 Bremen, Germany
| | - Nadja C. Bigall
- Institute
of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstraße 3a, D-30167 Hannover, Germany
- Cluster
of Excellence PhoenixD (Photonics, Optics, and Engineering—Innovation
Across Disciplines), Leibniz University
Hannover, D-30167 Hannover, Germany
| | - Simon Grabowsky
- Institute
of Inorganic Chemistry and Crystallography, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- Department
of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Artem A. Bakulin
- Cavendish
Laboratory, University of Cambridge, 19 J J Thomson Avenue, CB3 0HE Cambridge, U.K.
- Department of Chemistry, Imperial College
London, Imperial College Rd, SW7 2AZ London, U.K.
| | - Anne Staubitz
- Institute
for Analytical and Organic Chemistry, University
of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
- MAPEX
Center for Materials and Processes, University
of Bremen, Bibliothekstraße
1, D-28359 Bremen, Germany
| |
Collapse
|
7
|
Pal R, Banerjee M, Bhadada SK, Shetty AJ, Singh B, Vyas A. Vitamin D supplementation and clinical outcomes in COVID-19: a systematic review and meta-analysis. J Endocrinol Invest 2022; 45:53-68. [PMID: 34165766 PMCID: PMC8223190 DOI: 10.1007/s40618-021-01614-4] [Citation(s) in RCA: 58] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 06/12/2021] [Indexed: 12/13/2022]
Abstract
PURPOSE To provide a precise summary and collate the hitherto available clinical evidence on the effect of vitamin D supplementation on clinical outcomes in COVID-19 patients. METHODS PubMed/MEDLINE, Scopus, and Web of Science databases were systematically searched using appropriate keywords till June 8, 2021, to identify observational studies and randomized controlled trials (RCTs) reporting adverse clinical outcomes (ICU admission and/or mortality) in COVID-19 patients receiving vitamin D supplementation vs. those not receiving the same. Both prior use and use of vitamin D after COVID-19 diagnosis were considered. Unadjusted/adjusted pooled odds ratio (OR) with 95% confidence intervals (CI) were calculated (PROSPERO registration number CRD42021248488). RESULTS We identified 13 studies (10 observational, 3 RCTs) pooling data retrieved from 2933 COVID-19 patients. Pooled analysis of unadjusted data showed that vitamin D use in COVID-19 was significantly associated with reduced ICU admission/mortality (OR 0.41, 95% CI: 0.20, 0.81, p = 0.01, I2 = 66%, random-effects model). Similarly, on pooling adjusted risk estimates, vitamin D was also found to reduce the risk of adverse outcomes (pooled OR 0.27, 95% CI: 0.08, 0.91, p = 0.03, I2 = 80%, random-effects model). Subgroup analysis showed that vitamin D supplementation was associated with improved clinical outcomes only in patients receiving the drug post-COVID-19 diagnosis and not in those who had received vitamin D before diagnosis. CONCLUSIONS Vitamin D supplementation might be associated with improved clinical outcomes, especially when administered after the diagnosis of COVID-19. However, issues regarding the appropriate dose, duration, and mode of administration of vitamin D remain unanswered and need further research.
Collapse
Affiliation(s)
- R Pal
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - M Banerjee
- Department of Endocrinology, Institute of Postgraduate Medical Education and Research, Kolkata, 700020, India
| | - S K Bhadada
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India.
| | - A J Shetty
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - B Singh
- Government Medical College, Patiala, 147001, India
| | - A Vyas
- Department of Medicine, Rabindranath Tagore Medical College, Udaipur, 313001, India
| |
Collapse
|
8
|
Pal R, Sutherland C, Qureshi Q, Sathyakumar S. Landscape connectivity and population density of snow leopards across a multi‐use landscape in Western Himalaya. Anim Conserv 2021. [DOI: 10.1111/acv.12754] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- R. Pal
- Wildlife Institute of India Dehradun Uttarakhand India
| | - C. Sutherland
- Centre for Research into Ecological and Environmental Modelling University of St Andrews Scotland UK
| | - Q. Qureshi
- Wildlife Institute of India Dehradun Uttarakhand India
| | | |
Collapse
|
9
|
Pal R, Bhadada SK, Mukherjee S, Banerjee M, Kumar A. Fracture risk in hypoparathyroidism: a systematic review and meta-analysis. Osteoporos Int 2021; 32:2145-2153. [PMID: 34021765 DOI: 10.1007/s00198-021-05966-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 04/14/2021] [Indexed: 12/15/2022]
Abstract
UNLABELLED In this meta-analysis, we analyzed 7 observational studies for assessing the fracture risk in patients with hypoparathyroidism (hypoPT). We found that the risk of vertebral fractures is increased by almost 2-fold, especially those with nonsurgical hypoPT. PURPOSE Patients with hypoPT have higher bone mineral density than age- and sex-matched controls. This would theoretically translate into a lower risk of fractures, although available clinical evidence is contradictory. Hence, the present systematic review and meta-analysis was undertaken to collate and provide a precise summary of fracture risk in hypoPT. METHODS PubMed, Scopus, and Web of Science databases were systematically searched using appropriate keywords till March 8, 2021, to identify observational studies reporting the rate of occurrence of fractures among hypoPT patients (nonsurgical and/or postsurgical) compared to non-hypoPT subjects (controls). Study quality was assessed using Newcastle-Ottawa Scale. Pooled odds ratio (OR) with 95% confidence intervals (CI) was calculated. Subgroup analyses of nonsurgical and postsurgical hypoPT patients were also conducted. RESULTS We identified 7 observational studies of high-quality pooling data retrieved from 1470 patients with hypoPT. When stratified based on the skeletal site, pooled analyses showed that hypoPT patients were at an increased risk of vertebral fractures compared to non-hypoPT controls (OR 2.22, 95% CI: 1.23, 4.03, p = 0.009, I2 = 49%, random-effects model). The increased risk of vertebral fractures was seen only in patients with nonsurgical hypoPT (OR 2.31, 95% CI: 1.32, 4.03, p = 0.003, I2 = 3%, random-effects model) but not in those with postsurgical hypoPT. hypoPT patients were not at an increased or decreased risk of any, humerus, or proximal femur/hip fractures than controls. CONCLUSIONS Nonsurgical hypoPT patients are at an almost 2-fold increased risk of vertebral fractures and thus need to be actively screened irrespective of the underlying BMD.
Collapse
Affiliation(s)
- R Pal
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - S K Bhadada
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India.
| | - S Mukherjee
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - M Banerjee
- Department of Endocrinology, Institute of Postgraduate Medical Education and Research, Kolkata, 700007, India
| | - A Kumar
- National Institute of Nursing Education, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| |
Collapse
|
10
|
Pal R, Bhadada SK, Gupta N, Behera A, Aggarwal N, Aggarwal A, Raviteja KV, Saikia UN, Kaur G, Arvindbhai SM, Walia R. Primary hyperparathyroidism in pregnancy: observations from the Indian PHPT registry. J Endocrinol Invest 2021; 44:1425-1435. [PMID: 33037580 DOI: 10.1007/s40618-020-01441-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 09/29/2020] [Indexed: 01/12/2023]
Abstract
PURPOSE To present the data on primary hyperparathyroidism (PHPT) in pregnancy from India obtained from a large database maintained over 15 years. METHODS We retrieved data of all women with gestational PHPT from the Indian PHPT registry between July 2005 and January 2020, and compared their clinical, biochemical, and other characteristics with age-matched non-pregnant women with PHPT. RESULTS Out of 386 women, eight had gestational PHPT (2.1%). The common presenting manifestations were acute pancreatitis (50%) and renal stone disease (50%); two were asymptomatic. Five women (62.5%) had a history of prior miscarriages. Seven patients (88%) had preeclampsia during the present gestation. Serum calcium and intact parathyroid hormone (iPTH) were not statistically different from the age-matched non-pregnant PHPT group. Six patients with mild-to-moderate hypercalcemia were medically managed with hydration with/without cinacalcet while one patient underwent percutaneous ethanol ablation of the parathyroid adenoma; none underwent surgery during pregnancy. Mean serum calcium maintained from treatment initiation till delivery was 10.5 ± 0.4 mg/dl. One patient had spontaneous preterm delivery at 36 weeks; the remaining patients had normal vaginal delivery at term. None had severe preeclampsia/eclampsia. Fetal outcomes included low birth weight in three newborns (37.5%); two of them had hypocalcemic seizures. CONCLUSION The prevalence of gestational PHPT was 2.1% in this largest Indian PHPT cohort, which is higher than that reported from the West (< 1%). Gestational PHPT can lead to preeclampsia and miscarriage. Pregnant PHPT patients with mild-to-moderate hypercalcemia can be managed with hydration/cinacalcet; however, long-term safety data and large-scale randomized controlled trials are required.
Collapse
Affiliation(s)
- R Pal
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - S K Bhadada
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India.
| | - N Gupta
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - A Behera
- Department of General Surgery, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - N Aggarwal
- Department of Gynecology and Obstetrics, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - A Aggarwal
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - K V Raviteja
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - U N Saikia
- Department of Histopathology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - G Kaur
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - S M Arvindbhai
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - R Walia
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| |
Collapse
|
11
|
Armstrong ACG, Sibley J, Phippen G, Popat S, Pal R, Kini U, Hotton M, Kidner G, Thorburn TG, Swan MC. Lockdown lessons: The virtual cleft multidisciplinary clinic. J Plast Reconstr Aesthet Surg 2021; 74:1931-1971. [PMID: 34140242 DOI: 10.1016/j.bjps.2021.05.009] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 03/24/2021] [Accepted: 05/24/2021] [Indexed: 10/21/2022]
Affiliation(s)
- A C G Armstrong
- The Spires Cleft Centre, John Radcliffe Hospital, Headley Way, Headington, Oxford OX3 9DU, United Kingdom.
| | - J Sibley
- The Spires Cleft Centre, John Radcliffe Hospital, Headley Way, Headington, Oxford OX3 9DU, United Kingdom
| | - G Phippen
- The Spires Cleft Centre, John Radcliffe Hospital, Headley Way, Headington, Oxford OX3 9DU, United Kingdom
| | - S Popat
- The Spires Cleft Centre, John Radcliffe Hospital, Headley Way, Headington, Oxford OX3 9DU, United Kingdom
| | - R Pal
- The Spires Cleft Centre, John Radcliffe Hospital, Headley Way, Headington, Oxford OX3 9DU, United Kingdom
| | - U Kini
- The Spires Cleft Centre, John Radcliffe Hospital, Headley Way, Headington, Oxford OX3 9DU, United Kingdom
| | - M Hotton
- The Spires Cleft Centre, John Radcliffe Hospital, Headley Way, Headington, Oxford OX3 9DU, United Kingdom
| | - G Kidner
- The Spires Cleft Centre, John Radcliffe Hospital, Headley Way, Headington, Oxford OX3 9DU, United Kingdom
| | - T G Thorburn
- The Spires Cleft Centre, John Radcliffe Hospital, Headley Way, Headington, Oxford OX3 9DU, United Kingdom
| | - M C Swan
- The Spires Cleft Centre, John Radcliffe Hospital, Headley Way, Headington, Oxford OX3 9DU, United Kingdom
| |
Collapse
|
12
|
Dabas R, Varadaraj G, Sandhu S, Bhatnagar A, Pal R. Kawasaki-like multisystem inflammatory syndrome associated with COVID-19 in an adult: a case report. Br J Dermatol 2021; 185:859-861. [PMID: 34115386 PMCID: PMC9214080 DOI: 10.1111/bjd.20574] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 05/04/2021] [Accepted: 05/30/2021] [Indexed: 12/16/2022]
Affiliation(s)
- R Dabas
- Department of Dermatology, Command Hospital Air Force Bangalore, Bengaluru, India
| | - G Varadaraj
- Department of Medicine, Command Hospital Air Force Bangalore, Bengaluru, India
| | - S Sandhu
- Department of Dermatology, Command Hospital Air Force Bangalore, Bengaluru, India
| | - A Bhatnagar
- Department of Dermatology, Command Hospital Air Force Bangalore, Bengaluru, India
| | - R Pal
- Department of Dermatology, Command Hospital Air Force Bangalore, Bengaluru, India
| |
Collapse
|
13
|
Banerjee M, Pal R. Reply to letter to the editor: "COVID-19 and the endocrine system: exploring the unexplored". Focus on acromegaly. J Endocrinol Invest 2021; 44:639-640. [PMID: 33386586 PMCID: PMC7775727 DOI: 10.1007/s40618-020-01470-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 11/17/2020] [Indexed: 11/12/2022]
Affiliation(s)
- M Banerjee
- Department of Endocrinology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - R Pal
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India.
| |
Collapse
|
14
|
Pal R, Jelsch C, Malaspina LA, Edwards AJ, Murshed MM, Grabowsky S. syn and anti polymorphs of 2,6-dimethoxy benzoic acid and its molecular and ionic cocrystals: Structural analysis and energetic perspective. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128721] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
15
|
Affiliation(s)
- R Pal
- Department of Endocrinology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India.
| | - M Banerjee
- Department of Endocrinology, Institute of Post Graduate Medical Education and Research (IPGMER), Kolkata, 700007, India
| |
Collapse
|
16
|
Quiñones-Ossa GA, Durango-Espinosa YA, Padilla-Zambrano H, Ruiz J, Moscote-Salazar LR, Galwankar S, Gerber J, Hollandx R, Ghosh A, Pal R, Agrawal A. Current Status of Indications, Timing, Management, Complications, and Outcomes of Tracheostomy in Traumatic Brain Injury Patients. J Neurosci Rural Pract 2020; 11:222-229. [PMID: 32367975 PMCID: PMC7195963 DOI: 10.1055/s-0040-1709971] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Tracheostomy is the commonest bedside surgical procedure performed on patients needing mechanical ventilation with traumatic brain injury (TBI). The researchers made an effort to organize a narrative review of the indications, timing, management, complications, and outcomes of tracheostomy in relation to neuronal and brain-injured patients following TBI. The study observations were collated from the published literature, namely original articles, book chapters, case series, randomized studies, systematic reviews, and review articles. Information sorting was restricted to tracheostomy and its association with TBI. Care was taken to review the correlation of tracheostomy with clinical correlates including indications, scheduling, interventions, prognosis, and complications of the patients suffering from mild, moderate and severe TBIs using Glasgow Coma Scale, Glasgow Outcome Scale, intraclass correlation coefficient, and other internationally acclaimed outcome scales. Tracheostomy is needed to overcome airway obstruction, prolonged respiratory failure and as indispensable component of mechanical ventilation due to diverse reasons in intensive care unit. Researchers are divided over early tracheostomy or late tracheostomy from days to weeks. The conventional classic surgical technique of tracheostomy has been superseded by percutaneous techniques by being less invasive with lesser complications, classified into early and late complications that may be life threatening. Additional studies have to be conducted to validate and streamline varied observations to frame evidence-based practice for successful weaning and decannulation. Tracheostomy is a safer option in critically ill TBI patients for which a universally accepted protocol for tracheostomy is needed that can help to optimize indications and outcomes.
Collapse
Affiliation(s)
| | - Y A Durango-Espinosa
- Cartagena Neurotrauma Research Group Research Line, Faculty of Medicine, University of Cartagena, Cartagena de Indias, Colombia
| | - H Padilla-Zambrano
- Center for Biomedical Research (CIB), Cartagena Neurotrauma Research Group Research Line, Faculty of Medicine, University of Cartagena, Cartagena de Indias, Colombia
| | - Jenny Ruiz
- Cartagena Neurotrauma Research Group Research Line, Faculty of Medicine, University of Cartagena, Cartagena de Indias, Colombia
| | - Luis Rafael Moscote-Salazar
- Center for Biomedical Research (CIB), Faculty of Medicine - University of Cartagena, Cartagena Colombia, CLaNi- Latin American Council of Neurocritical Care, Cartagena, Colombia
| | - S Galwankar
- Department of Emergency Medicine, Sarasota Memorial Hospital, Florida State University, Florida, United States
| | - J Gerber
- Department of Emergency Medicine, Sarasota Memorial Hospital, Florida State University, Florida, United States
| | - R Hollandx
- Department of Emergency Medicine, Sarasota Memorial Hospital, Florida State University, Florida, United States
| | - Amrita Ghosh
- Department of Biochemistry, Medical College, Kolkata, India
| | - R Pal
- Department of Community Medicine, MGM Medical College & LSK Hospital, Kishanganj, Bihar, India
| | - Amit Agrawal
- Department of Neurosurgery, All India Institute of Medical Sciences, Bhopal, Madhya Pradesh, India
| |
Collapse
|
17
|
Abstract
Pulmonary crackles are indicative of lung pathology and may be used for diagnosis and monitoring of disease. Many algorithms have been proposed to separate the crackle sounds from the breath noise, but a lack of standardized processes for evaluating their performance makes comparisons difficult. In this paper we propose a standard data set to be used for systematic comparative testing.
Collapse
|
18
|
Rout RP, Sahoo BK, Pal R, Dhabekar BS, Bakshi AK, Datta D. Investigation of 220Rn emanation and exhalation from soil samples of Larsemann Hills region, Antarctica. J Environ Radioact 2020; 214-215:106175. [PMID: 32063292 DOI: 10.1016/j.jenvrad.2020.106175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 01/08/2020] [Accepted: 01/20/2020] [Indexed: 06/10/2023]
Abstract
In the present study, thoron exhalation flux density were measured in the soil samples collected around the Indian station namely Bharati (69° 24.41' S, 76° 11.72' E) and its nearby islands in the Larsemann hills region of Antarctica. Further, dependency of thoron mass emanation rate and emanation coefficient on the soil grain size was studied by segregating the soil samples into four different grain size groups: 50-100 μm, 100-200 μm, 200-500 μm and 500-1000 μm which showed that both of them follow a decreasing trend with increase in grain size. A comparison of measured mass emanation rate between different soil samples showed that it had a larger variation for the smaller grain size which eventually decreased as grain size increased while emanation coefficient was observed to be nearly constant for all the grain size groups. The variation in emanation coefficient with respect to mean grain size has been investigated and an empirical exponential model has been proposed for predicting emanation coefficient for different grain sizes.
Collapse
Affiliation(s)
- R P Rout
- Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, 400085, India; Homi Bhabha National Institute, Mumbai, 400 094, India
| | - B K Sahoo
- Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
| | - R Pal
- Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, 400085, India; Homi Bhabha National Institute, Mumbai, 400 094, India
| | - B S Dhabekar
- Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - A K Bakshi
- Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - D Datta
- Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| |
Collapse
|
19
|
RATHORE V, Pal R, Galhotra A, Patel S, Nagarkar M N. SUN-114 A CLINICAL AND EPIDEMIOLOGICAL PROFILE OF PATIENTS WITH CHRONIC KIDNEY DISEASE OF UNKNOWN ETIOLOGY ATTENDING AIIMS, RAIPUR, CHHATTISGARH. Kidney Int Rep 2020. [DOI: 10.1016/j.ekir.2020.02.641] [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: 10/24/2022] Open
|
20
|
Malaspina LA, Wieduwilt EK, Bergmann J, Kleemiss F, Meyer B, Ruiz-López MF, Pal R, Hupf E, Beckmann J, Piltz RO, Edwards AJ, Grabowsky S, Genoni A. Fast and Accurate Quantum Crystallography: From Small to Large, from Light to Heavy. J Phys Chem Lett 2019; 10:6973-6982. [PMID: 31633355 DOI: 10.1021/acs.jpclett.9b02646] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The coupling of the crystallographic refinement technique Hirshfeld atom refinement (HAR) with the recently constructed libraries of extremely localized molecular orbitals (ELMOs) gives rise to the new quantum-crystallographic method HAR-ELMO. This method is significantly faster than HAR but as accurate and precise, especially concerning the free refinement of hydrogen atoms from X-ray diffraction data, so that the first fully quantum-crystallographic refinement of a protein is presented here. However, the promise of HAR-ELMO exceeds large molecules and protein crystallography. In fact, it also renders possible electron-density investigations of heavy elements in small molecules and facilitates the detection and isolation of systematic errors from physical effects.
Collapse
Affiliation(s)
- Lorraine A Malaspina
- Institut für Anorganische Chemie und Kristallographie, Fachbereich 2 - Biologie/Chemie , Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
| | - Erna K Wieduwilt
- Institut für Anorganische Chemie und Kristallographie, Fachbereich 2 - Biologie/Chemie , Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
- Université de Lorraine , CNRS, Laboratoire de Physique et Chimie Théoriques (LPCT) , 1 Boulevard Arago , 57078 Metz , France
| | - Justin Bergmann
- Institut für Anorganische Chemie und Kristallographie, Fachbereich 2 - Biologie/Chemie , Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
| | - Florian Kleemiss
- Institut für Anorganische Chemie und Kristallographie, Fachbereich 2 - Biologie/Chemie , Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
- Departement für Chemie und Biochemie , Universität Bern , Freiestrasse 3 , 3012 Bern , Switzerland
| | - Benjamin Meyer
- Université de Lorraine , CNRS, Laboratoire de Physique et Chimie Théoriques (LPCT) , 1 Boulevard Arago , 57078 Metz , France
| | - Manuel F Ruiz-López
- Université de Lorraine , CNRS, Laboratoire de Physique et Chimie Théoriques (LPCT) , 1 Boulevard Arago , 57078 Metz , France
| | - Rumpa Pal
- Institut für Anorganische Chemie und Kristallographie, Fachbereich 2 - Biologie/Chemie , Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
| | - Emanuel Hupf
- Institut für Anorganische Chemie und Kristallographie, Fachbereich 2 - Biologie/Chemie , Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Fachbereich 2 - Biologie/Chemie , Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
| | - Ross O Piltz
- Australian Nuclear Science and Technology Organisation , Australian Centre for Neutron Scattering , New Illawarra Road , Lucas Heights , NSW 2234 , Australia
| | - Alison J Edwards
- Australian Nuclear Science and Technology Organisation , Australian Centre for Neutron Scattering , New Illawarra Road , Lucas Heights , NSW 2234 , Australia
| | - Simon Grabowsky
- Institut für Anorganische Chemie und Kristallographie, Fachbereich 2 - Biologie/Chemie , Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
- Departement für Chemie und Biochemie , Universität Bern , Freiestrasse 3 , 3012 Bern , Switzerland
| | - Alessandro Genoni
- Université de Lorraine , CNRS, Laboratoire de Physique et Chimie Théoriques (LPCT) , 1 Boulevard Arago , 57078 Metz , France
| |
Collapse
|
21
|
Sharma S, Kini L, Katara R, Pandey S, Kumar V, Pal R. EP1.09-07 Detection of EGFR Mutation by Automated and Rapid qPCR Based Biocartis IdyllaTM System in Lung Cancer Patients. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.2203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
22
|
Fugel M, Malaspina LA, Pal R, Thomas SP, Shi MW, Spackman MA, Sugimoto K, Grabowsky S. Front Cover: Revisiting a Historical Concept by Using Quantum Crystallography: Are Phosphate, Sulfate and Perchlorate Anions Hypervalent? (Chem. Eur. J. 26/2019). Chemistry 2019. [DOI: 10.1002/chem.201901181] [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] [Indexed: 11/09/2022]
Affiliation(s)
- Malte Fugel
- Department 2-Chemistry/BiologyInstitute of Inorganic Chemistry and CrystallographyUniversity of Bremen Leobener Str. 3 and 7 28359 Bremen Germany
| | - Lorraine A. Malaspina
- Department 2-Chemistry/BiologyInstitute of Inorganic Chemistry and CrystallographyUniversity of Bremen Leobener Str. 3 and 7 28359 Bremen Germany
| | - Rumpa Pal
- Department 2-Chemistry/BiologyInstitute of Inorganic Chemistry and CrystallographyUniversity of Bremen Leobener Str. 3 and 7 28359 Bremen Germany
- Current address: Division of PhysicsFaculty of Pure and Applied SciencesUniversity of Tsukuba 1-1-1 Tennodai Tsukuba Ibaraki 305-8571 Japan
| | - Sajesh P. Thomas
- School of Molecular SciencesUniversity of Western Australia 35 Stirling Highway Perth WA 6009 Australia
- Current address: Interdisciplinary Nanoscience Center - INANO-KemiAarhus University Langelandsgade 140 8000 Aarhus C Denmark
| | - Ming W. Shi
- School of Molecular SciencesUniversity of Western Australia 35 Stirling Highway Perth WA 6009 Australia
| | - Mark A. Spackman
- School of Molecular SciencesUniversity of Western Australia 35 Stirling Highway Perth WA 6009 Australia
| | - Kunihisa Sugimoto
- SPring-8Japan Synchrotron Radiation Research Institute 1-1-1 Kouto Sayo-cho Sayo-gun, Hyogo 679-5198 Japan
| | - Simon Grabowsky
- Department 2-Chemistry/BiologyInstitute of Inorganic Chemistry and CrystallographyUniversity of Bremen Leobener Str. 3 and 7 28359 Bremen Germany
| |
Collapse
|
23
|
Fugel M, Malaspina LA, Pal R, Thomas SP, Shi MW, Spackman MA, Sugimoto K, Grabowsky S. Revisiting a Historical Concept by Using Quantum Crystallography: Are Phosphate, Sulfate and Perchlorate Anions Hypervalent? Chemistry 2019. [DOI: 10.1002/chem.201901182] [Citation(s) in RCA: 1] [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: 11/06/2022]
Affiliation(s)
- Malte Fugel
- Department 2-Chemistry/BiologyInstitute of Inorganic Chemistry and CrystallographyUniversity of Bremen Leobener Str. 3 and 7 28359 Bremen Germany
| | - Lorraine A. Malaspina
- Department 2-Chemistry/BiologyInstitute of Inorganic Chemistry and CrystallographyUniversity of Bremen Leobener Str. 3 and 7 28359 Bremen Germany
| | - Rumpa Pal
- Department 2-Chemistry/BiologyInstitute of Inorganic Chemistry and CrystallographyUniversity of Bremen Leobener Str. 3 and 7 28359 Bremen Germany
- Current address: Division of PhysicsFaculty of Pure and Applied SciencesUniversity of Tsukuba 1-1-1 Tennodai Tsukuba Ibaraki 305-8571 Japan
| | - Sajesh P. Thomas
- School of Molecular SciencesUniversity of Western Australia 35 Stirling Highway Perth WA 6009 Australia
- Current address: Interdisciplinary Nanoscience Center - INANO-KemiAarhus University Langelandsgade 140 8000 Aarhus C Denmark
| | - Ming W. Shi
- School of Molecular SciencesUniversity of Western Australia 35 Stirling Highway Perth WA 6009 Australia
| | - Mark A. Spackman
- School of Molecular SciencesUniversity of Western Australia 35 Stirling Highway Perth WA 6009 Australia
| | - Kunihisa Sugimoto
- SPring-8Japan Synchrotron Radiation Research Institute 1-1-1 Kouto Sayo-cho Sayo-gun, Hyogo 679-5198 Japan
| | - Simon Grabowsky
- Department 2-Chemistry/BiologyInstitute of Inorganic Chemistry and CrystallographyUniversity of Bremen Leobener Str. 3 and 7 28359 Bremen Germany
| |
Collapse
|
24
|
Fugel M, Malaspina LA, Pal R, Thomas SP, Shi MW, Spackman MA, Sugimoto K, Grabowsky S. Revisiting a Historical Concept by Using Quantum Crystallography: Are Phosphate, Sulfate and Perchlorate Anions Hypervalent? Chemistry 2019; 25:6523-6532. [PMID: 30759315 DOI: 10.1002/chem.201806247] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 12/17/2018] [Indexed: 11/05/2022]
Abstract
There are many examples of atoms in molecules that violate Lewis' octet rule, because they have more than four electron pairs assigned to their valence. These atoms are referred to as hypervalent. However, hypervalency may be regarded as an artifact arising from Lewis' description of molecules, which is based on the assumption that electrons are localized in two-center two-electron bonds and lone pairs. In the present paper, the isoelectronic phosphate (PO4 3- ), sulfate (SO4 2- ) and perchlorate (ClO4 - ) anions were examined with respect to the concept of hypervalency. Lewis formulas containing a hypervalent central atom exist for all three anions. Based on X-ray wavefunction refinements of high-resolution X-ray diffraction data of representative crystal structures (MgNH4 PO4 ⋅6 H2 O, Li2 SO4 ⋅H2 O, and KClO4 ), complementary bonding analyses were performed. In this way, experimental information from the new field of quantum crystallography validate long-known facts, or refute long-standing misunderstandings. It is shown that the P-O and S-O bonds are highly polarized covalent bonds and, thus, the increase in the valence population following three-center four-electron bonding is not sufficient to yield hypervalent phosphorus or sulfur atoms, respectively. However, for the highly covalent Cl-O bond, most bonding indicators imply a hypervalent chlorine atom.
Collapse
Affiliation(s)
- Malte Fugel
- Department 2-Chemistry/Biology, Institute of Inorganic Chemistry and Crystallography, University of Bremen, Leobener Str. 3 and 7, 28359, Bremen, Germany
| | - Lorraine A Malaspina
- Department 2-Chemistry/Biology, Institute of Inorganic Chemistry and Crystallography, University of Bremen, Leobener Str. 3 and 7, 28359, Bremen, Germany
| | - Rumpa Pal
- Department 2-Chemistry/Biology, Institute of Inorganic Chemistry and Crystallography, University of Bremen, Leobener Str. 3 and 7, 28359, Bremen, Germany.,Current address: Division of Physics, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8571, Japan
| | - Sajesh P Thomas
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia.,Current address: Interdisciplinary Nanoscience Center - INANO-Kemi, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Ming W Shi
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia
| | - Mark A Spackman
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia
| | - Kunihisa Sugimoto
- SPring-8, Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Simon Grabowsky
- Department 2-Chemistry/Biology, Institute of Inorganic Chemistry and Crystallography, University of Bremen, Leobener Str. 3 and 7, 28359, Bremen, Germany
| |
Collapse
|
25
|
Ward EN, Pal R. Holographic projection for multispot structured illumination microscopy. J Microsc 2019; 274:114-120. [PMID: 30793307 DOI: 10.1111/jmi.12787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 02/15/2019] [Accepted: 02/19/2019] [Indexed: 11/30/2022]
Abstract
This paper describes the design and testing of a multispot structured illumination microscopy system using computer-generated holograms to create the required excitation patterns. Furthermore, it demonstrates the use of an adapted direct search algorithm for calculating the holograms that allows for imaging across an extended field of view. The system was tested on fixed targets and live cells yielding a two times resolution increase over conventional diffraction-limited imaging. LAY DESCRIPTION: We present the design and testing of a multispot structured illumination microscopy system using computer-generated holograms to create the required excitation patterns. It demonstrates the use of an adapted direct search algorithm for calculating the holograms that allows for imaging across an extended field of view. The system was tested on fixed targets and live cells yielding a two times resolution increase over conventional diffraction-limited imaging. The results here demonstrate that holography provides an efficient means of pattern projection for MSIM imaging. It provides a significant improvement in the efficiency of pattern projection and more importantly it allows for the testing of more diverse excitation patterns than possible with amplitude-only projection. For example, PSF engineering using phase modulation can be easily incorporated into the calculated holograms, potentially generating subdiffraction structures in the excitation pattern. The ability to incorporate PSF engineering into SIM opens up holographic MSIM as a potential method for further increasing resolution with little or no change to the imaging system.
Collapse
Affiliation(s)
- E N Ward
- Department of Chemistry, Durham University, Durham, U.K
| | - R Pal
- Department of Chemistry, Durham University, Durham, U.K
| |
Collapse
|
26
|
Agrawal A, Quinones-Ossa GA, Padilla-Zambrano H, Pal R, Ghosh A, Moscote-Salazar LR, Kiran Kumar VA. Biomarkers in acute brain trauma: A narrative review. J Acute Dis 2019. [DOI: 10.4103/2221-6189.250370] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
27
|
Fugel M, Hesse MF, Pal R, Beckmann J, Jayatilaka D, Turner MJ, Karton A, Bultinck P, Chandler GS, Grabowsky S. Covalency and Ionicity Do Not Oppose Each Other-Relationship Between Si-O Bond Character and Basicity of Siloxanes. Chemistry 2018; 24:15275-15286. [PMID: 29999553 DOI: 10.1002/chem.201802197] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [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: 05/02/2018] [Revised: 07/11/2018] [Indexed: 11/07/2022]
Abstract
Covalency and ionicity are orthogonal rather than antipodal concepts. We demonstrate for the case of siloxane systems [R3 Si-(O-SiR2 )n -O-SiR3 ] that both covalency and ionicity of the Si-O bonds impact on the basicity of the Si-O-Si linkage. The relationship between the siloxane basicity and the Si-O bond character has been under debate since previous studies have presented conflicting explanations. It has been shown with natural bond orbital methods that increased hyperconjugative interactions of LP(O)→σ*(Si-R) type, that is, increased orbital overlap and hence covalency, are responsible for the low siloxane basicity at large Si-O-Si angles. On the other hand, increased ionicity towards larger Si-O-Si angles has been revealed with real-space bonding indicators. To resolve this ostensible contradiction, we perform a complementary bonding analysis, which combines orbital-space, real-space, and bond-index considerations. We analyze the isolated disiloxane molecule H3 SiOSiH3 with varying Si-O-Si angles, and n-membered cyclic siloxane systems Si2 H4 O(CH2 )n-3 . All methods from quite different realms show that both covalent and ionic interactions increase simultaneously towards larger Si-O-Si angles. In addition, we present highly accurate absolute hydrogen-bond interaction energies of the investigated siloxane molecules with water and silanol as donors. It is found that intermolecular hydrogen bonding is significant at small Si-O-Si angles and weakens as the Si-O-Si angle increases until no stable hydrogen-bond complexes are obtained beyond φSiOSi =168°, angles typically displayed by minerals or polymers. The maximum hydrogen-bond interaction energy, which is obtained at an angle of 105°, is 11.05 kJ mol-1 for the siloxane-water complex and 18.40 kJ mol-1 for the siloxane-silanol complex.
Collapse
Affiliation(s)
- Malte Fugel
- University of Bremen, Department 2-Chemistry/Biology, Institute of Inorganic Chemistry and Crystallography, Leobener Str. 3 and 7, 28359, Bremen, Germany
| | - Maxie F Hesse
- University of Bremen, Department 2-Chemistry/Biology, Institute of Inorganic Chemistry and Crystallography, Leobener Str. 3 and 7, 28359, Bremen, Germany
| | - Rumpa Pal
- University of Bremen, Department 2-Chemistry/Biology, Institute of Inorganic Chemistry and Crystallography, Leobener Str. 3 and 7, 28359, Bremen, Germany
| | - Jens Beckmann
- University of Bremen, Department 2-Chemistry/Biology, Institute of Inorganic Chemistry and Crystallography, Leobener Str. 3 and 7, 28359, Bremen, Germany
| | - Dylan Jayatilaka
- University of Western Australia, School of Molecular Sciences, 35 Stirling Highway, Perth, WA, 6009, Australia
| | - Michael J Turner
- University of Western Australia, School of Molecular Sciences, 35 Stirling Highway, Perth, WA, 6009, Australia
| | - Amir Karton
- University of Western Australia, School of Molecular Sciences, 35 Stirling Highway, Perth, WA, 6009, Australia
| | - Patrick Bultinck
- Ghent University, Department of Chemistry, Krijgslaan 281 (S3), 9000, Gent, Belgium
| | - Graham S Chandler
- University of Western Australia, School of Molecular Sciences, 35 Stirling Highway, Perth, WA, 6009, Australia
| | - Simon Grabowsky
- University of Bremen, Department 2-Chemistry/Biology, Institute of Inorganic Chemistry and Crystallography, Leobener Str. 3 and 7, 28359, Bremen, Germany
| |
Collapse
|
28
|
Grabowsky S, Mallow O, Pal R, Pergandé Y, Lork E, Näther C, Beckmann J. Conformational trimorphism of bis(2,6-dimesitylphenyl)ditelluride. Z KRIST-CRYST MATER 2018. [DOI: 10.1515/zkri-2018-2077] [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: 11/15/2022]
Abstract
Abstract
Besides the previously known α-form (monoclinic, P21/c, Z=4) of bis(2,6-dimesitylphenyl)ditelluride, two new polymorphic modifications, namely the β-form (monoclinic, P21/c, Z=8) and the γ-form (triclinic, P1̅, Z=2), were obtained serendipitously during chemical reactions. In all three modifications, the individual molecules possess significantly different conformations and bond parameters, such as Te–Te bond lengths, C–Te–Te bond angles, C–Te–Te–C torsion angles and intramolecular Menshutkin interactions, which is also reflected in their non-covalent interactions with adjacent molecules in the crystal lattice via London dispersion and electrostatic forces. The interplay between intermolecular and intramolecular forces in these conformational polymorphs was investigated using quantum chemical calculations, which reveal that the β-form should be thermodynamically stable at absolute zero. In contrast, crystallization experiments and thermoanalytical investigations indicate that the α-form is stable at high temperatures and therefore, both forms might be related by enantiotropism.
Collapse
Affiliation(s)
- Simon Grabowsky
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
| | - Ole Mallow
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
| | - Rumpa Pal
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
| | - Yves Pergandé
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
| | - Enno Lork
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
| | - Christian Näther
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel , Max-Eyth-Str. 2 , 24118 Kiel , Germany
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen , Leobener Straße 3 und 7 , 28359 Bremen , Germany
| |
Collapse
|
29
|
Pal R, Mebs S, Shi MW, Jayatilaka D, Krzeszczakowska JM, Malaspina LA, Wiecko M, Luger P, Hesse M, Chen YS, Beckmann J, Grabowsky S. Linear MgCp* 2 vs Bent CaCp* 2: London Dispersion, Ligand-Induced Charge Localizations, and Pseudo-Pregostic C-H···Ca Interactions. Inorg Chem 2018; 57:4906-4920. [PMID: 29671589 DOI: 10.1021/acs.inorgchem.7b03079] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the family of metallocenes, MgCp*2 (Cp* = pentamethylcyclopentadienyl) exhibits a regular linear sandwich structure, whereas CaCp*2 is bent in both the gas phase and solid state. Bending is typically observed for metal ions which possess a lone pair. Here, we investigate which electronic differences cause the bending in complexes lacking lone pairs at the metal atoms. The bent gas-phase geometry of CaCp*2 suggests that the bending must have an intramolecular origin. Geometry optimizations with and without dispersion effects/d-type polarization functions on MCp2 and MCp*2 gas-phase complexes (M = Ca, Mg) establish that attractive methyl···methyl London dispersion interactions play a decisive role in the bending in CaCp*2. A sufficient polarizability of the metal to produce a shallow bending potential energy curve is a prerequisite but is not the reason for the bending. Concomitant ligand-induced charge concentrations and localizations at the metal atoms are studied in further detail, for which real-space bonding and orbital-based descriptors are used. Low-temperature crystal structures of MgCp*2 and CaCp*2 were determined which facilitated the identification and characterization of intermolecular pseudo-pregostic interactions, C-H···Ca, in the CaCp*2 crystal structure.
Collapse
Affiliation(s)
- Rumpa Pal
- Universität Bremen , Institut für Anorganische Chemie und Kristallographie , Leobener Straße 3 and 7 , 28359 Bremen , Germany
| | - Stefan Mebs
- Freie Universität Berlin , Institut für Experimentalphysik , Arnimallee 14 , 14195 Berlin , Germany
| | - Ming W Shi
- The University of Western Australia, School of Molecular Sciences , 35 Stirling Highway , Perth Western Australia 6009 , Australia
| | - Dylan Jayatilaka
- The University of Western Australia, School of Molecular Sciences , 35 Stirling Highway , Perth Western Australia 6009 , Australia
| | - Joanna M Krzeszczakowska
- University of Warsaw , Biological and Chemical Research Centre, Chemistry Department , Zwirki i Wigury 101 , 02-089 Warsaw , Poland
| | - Lorraine A Malaspina
- Universität Bremen , Institut für Anorganische Chemie und Kristallographie , Leobener Straße 3 and 7 , 28359 Bremen , Germany
| | - Michal Wiecko
- Freie Universität Berlin , Institut für Chemie und Biochemie, Anorganische Chemie , Fabeckstraße 36a , 14195 Berlin , Germany
| | - Peter Luger
- Freie Universität Berlin , Institut für Chemie und Biochemie, Anorganische Chemie , Fabeckstraße 36a , 14195 Berlin , Germany
| | - Malte Hesse
- Universität Bremen , Institut für Anorganische Chemie und Kristallographie , Leobener Straße 3 and 7 , 28359 Bremen , Germany
| | - Yu-Sheng Chen
- ChemMatCARS, Center for Advanced Radiation Sources, c/o Advanced Photon Source/ANL , The University of Chicago , 9700 South Cass Avenue , Building 434D, Argonne , Illinois 60439 , United States
| | - Jens Beckmann
- Universität Bremen , Institut für Anorganische Chemie und Kristallographie , Leobener Straße 3 and 7 , 28359 Bremen , Germany
| | - Simon Grabowsky
- Universität Bremen , Institut für Anorganische Chemie und Kristallographie , Leobener Straße 3 and 7 , 28359 Bremen , Germany
| |
Collapse
|
30
|
Pal R, Reddy MBM, Dinesh B, Venkatesha MA, Grabowsky S, Jelsch C, Guru Row TN. Syn vs Anti Carboxylic Acids in Hybrid Peptides: Experimental and Theoretical Charge Density and Chemical Bonding Analysis. J Phys Chem A 2018. [DOI: 10.1021/acs.jpca.7b10939] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rumpa Pal
- Institute of Inorganic Chemistry and Crystallography, University of Bremen, 28359 Bremen, Germany
| | | | | | | | - Simon Grabowsky
- Institute of Inorganic Chemistry and Crystallography, University of Bremen, 28359 Bremen, Germany
| | - Christian Jelsch
- CRM2, CNRS, Université de Lorraine, Faculté des Sciences et Technologies, BP 70239, 54506 Vandoeuvre-les-Nancy, France
| | | |
Collapse
|
31
|
Abstract
Purpose In India, 52,000 children go blind every year on account of vitamin A deficiency. The purpose of the study was determine the correlates of vitamin A deficiency among 4,205 preschool-age children. Methods Case-control study in Bihta Primary Health Center area, Bihar, India. Main outcome measures were dietary habits, maternal literacy, and birth order. Results Vitamin A deficiency was found to be significantly higher (p<0.01) in children on a vegetarian diet (7.14%) (OR 5.32). Children born to a literate mother had a prevalence of only 1.35% in relation to a corresponding value of 4.11% in children born to illiterate mothers (p<0.01) (OR 3.15). Birth order of preschool-age children was significantly related to vitamin A deficiency. In birth order less than or equal to three, the prevalence was 2.81%, in comparison to those with birth order four or more, in whom the magnitude was significantly higher (p<0.01) at 5.61% (OR 2.08).
Collapse
Affiliation(s)
- R. Pal
- Department of Community Medicine, Sikkim-Manipal Institute of Medical Sciences (SMIMS), Gangtok, Sikkim
| | - V. Sagar
- Department of Community Medicine, Patna Medical College and Hospital (PMCH), Patna - India
| |
Collapse
|
32
|
Fugel M, Kleemiss F, Malaspina LA, Pal R, Spackman PR, Jayatilaka D, Grabowsky S. Investigating the Resonance in Nitric Acid and the Nitrate Anion Based on a Modern Bonding Analysis. Aust J Chem 2018. [DOI: 10.1071/ch17583] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The nitrate anion, NO3−, is often regarded as a textbook example for the very fundamental concept of resonance. Usually, three equivalent resonance structures with one N–O double bond and two N–O single bonds are considered. Consequently, each of the three N–O bonds should have a partial double bond character. In this study, we analyse the resonance in NO3− in comparison with the related species HNO3 and FNO3 by applying a combination of the Quantum Theory of Atoms in Molecules (QTAIM), a natural bond orbital (NBO) analysis, the electron localizability indicator (ELI), and valence bond (VB) calculations. Despite the fundamental importance of nitrate salts and nitric acid for the environment, chemistry, and industry, a bonding analysis is absent from the literature so far. The classical resonance structures are clearly reflected by the bond analysis tools, but are not the only contributions to the bonding situation. The resonance in HNO3 and FNO3 is greatly perturbed by the hydrogen and fluorine atoms. In addition to theoretical calculations, experimental electron density and wave function refinements were carried out on a KNO3 crystal.
Collapse
|
33
|
Pal R, Hupf E, Jayatilaka D, Grabowsky S. Introducing iterative X-ray wavefunction refinement. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s2053273317088726] [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: 11/10/2022] Open
|
34
|
|
35
|
Quinlan R, Kalligeraki A, Uwineza A, Jarrin M, Pal R. Radiation-induced cataracts. Acta Ophthalmol 2017. [DOI: 10.1111/j.1755-3768.2017.03684] [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] [Indexed: 11/28/2022]
Affiliation(s)
- R. Quinlan
- Department of Biosciences; University of Durham; Durham United Kingdom
| | - A. Kalligeraki
- Department of Biosciences; University of Durham; Durham United Kingdom
| | - A. Uwineza
- Department of Biosciences; University of Durham; Durham United Kingdom
| | - M. Jarrin
- Department of Biosciences; University of Durham; Durham United Kingdom
| | - R. Pal
- Department of Chemistry; University of Durham; Durham United Kingdom
| |
Collapse
|
36
|
Abstract
For almost a century, the resolution of optical microscopy was thought to be limited by Abbé's law describing the diffraction limit of light. At the turn of the millennium, aided by new technologies and fluorophores, the field of optical microscopy finally surpassed the diffraction barrier: a milestone achievement that has been recognized by the 2014 Nobel Prize in Chemistry. Many super-resolution methods rely on the unique photophysical properties of the fluorophores to improve resolution, posing significant limitations on biological imaging, such as multicoloured staining, live-cell imaging and imaging thick specimens. Structured Illumination Microscopy (SIM) is one branch of super-resolution microscopy that requires no such special properties of the applied fluorophores, making it more versatile than other techniques. Since its introduction in biological imaging, SIM has proven to be a popular tool in the biologist's arsenal for following biological interaction and probing structures of nanometre scale. SIM continues to see much advancement in design and implementation, including the development of Image Scanning Microscopy (ISM), which uses patterned excitation via either predefined arrays or raster-scanned single point-spread functions (PSF). This review aims to give a brief overview of the SIM and ISM processes and subsequent developments in the image reconstruction process. Drawing from this, and incorporating more recent achievements in light shaping (i.e. pattern scanning and super-resolution beam shaping), this study also intends to suggest potential future directions for this ever-expanding field.
Collapse
Affiliation(s)
- E N Ward
- Department of Chemistry, Durham University, Durham, UK
| | - R Pal
- Department of Chemistry, Durham University, Durham, UK
| |
Collapse
|
37
|
Arora P, Malik M, Sachdeva R, Saxena L, Das J, Ramachandran VG, Pal R. Innate and humoral recognition of the products of cell death: differential antigenicity and immunogenicity in lupus. Clin Exp Immunol 2016; 187:353-368. [PMID: 27783388 DOI: 10.1111/cei.12889] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2016] [Indexed: 10/20/2022] Open
Abstract
While apoptotic debris is believed to constitute the original antigenic insult in lupus (which is characterized by a time-dependent diversification of autoreactivity), whether such debris and autoantibodies specifically recognizing its constituents mediate differential effects on innate and humoral responses in lupus-prone mice is currently unknown. Apoptotic blebs (as opposed to cellular lysate) enhanced preferentially the maturation of dendritic cells (DCs) from bone marrow precursors drawn from lupus-prone mice. Murine, somatically mutated, apoptotic cell-reactive immunoglobulin (Ig)G monoclonal antibodies demonstrated enhanced recognition of DCs and also displayed a prominent lupus strain-specific bias in mediating DC maturation. Further, immunization of such antibodies specifically in lupus-prone mice resulted in widespread humoral autoreactivity; hypergammaglobulinaemia (a hallmark of systemic autoimmunity) was observed, accompanied by enhanced antibody titres to cellular moieties. Induced antibodies recognized antigens distinct from those recognized by the antibodies employed for immunization; in particular, nephritis-associated anti-double stranded (ds) DNA antibodies and neonatal lupus-associated anti-Ro60 antibodies were elicited by a non-dsDNA, non-Ro60 reactive antibody, and Sm was a favoured target. Further, only in lupus-prone mice did such immunization enhance the kinetics of humoral anti-self responses, resulting in the advanced onset of glomerulosclerosis. These studies reveal that preferential innate and humoral recognition of the products of cell death in a lupus milieu influence the indices associated with autoimmune pathology.
Collapse
Affiliation(s)
- P Arora
- National Institute of Immunology, New Delhi, India
| | - M Malik
- Department of Microbiology, University College of Medical Sciences and Guru Teg Bahadur Hospital, Delhi, India
| | - R Sachdeva
- National Institute of Immunology, New Delhi, India
| | - L Saxena
- National Institute of Immunology, New Delhi, India.,Department of Respiratory Virology, V.P. Chest Institute, University of Delhi, Delhi, India
| | - J Das
- National Institute of Immunology, New Delhi, India.,Dr Reddy's Laboratories, Biologics Development Center, Bachupalli, Hyderabad, Andhra Pradesh, India
| | - V G Ramachandran
- Department of Microbiology, University College of Medical Sciences and Guru Teg Bahadur Hospital, Delhi, India
| | - R Pal
- National Institute of Immunology, New Delhi, India
| |
Collapse
|
38
|
Pal R, Bamezai R. 557P Association of TGFB1 exon 1 129 T/C polymorphism with reduced risk of sporadic breast cancer in older North Indian women population. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00715-8] [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
|
39
|
Pal R, Bamezai R. 557P Association of TGFB1 exon 1 +29 T/C polymorphism with reduced risk of sporadic breast cancer in older North Indian women population. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw602.002] [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: 11/13/2022] Open
|
40
|
Quinlan R, Kalligeraki A, Pal R, Wu J, Inagaki M, Tanaka H. Investigating the effect of low dose ionising radiation on epithelial progenitor cell niches. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0239] [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: 11/29/2022]
|
41
|
Xie H, Pal R, Mitra S. A descriptive model of resting-state networks using Markov chains. Annu Int Conf IEEE Eng Med Biol Soc 2016; 2016:3594-3597. [PMID: 28269073 DOI: 10.1109/embc.2016.7591505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Resting-state functional connectivity (RSFC) studies considering pairwise linear correlations have attracted great interests while the underlying functional network structure still remains poorly understood. To further our understanding of RSFC, this paper presents an analysis of the resting-state networks (RSNs) based on the steady-state distributions and provides a novel angle to investigate the RSFC of multiple functional nodes. This paper evaluates the consistency of two networks based on the Hellinger distance between the steady-state distributions of the inferred Markov chain models. The results show that generated steady-state distributions of default mode network have higher consistency across subjects than random nodes from various RSNs.
Collapse
|
42
|
Abstract
The F···Ti bonding in the transition structures determines high trans- and syn-diastereoselectivities for aldol reactions of SF5-acetates with aldehydes in the presence of TiCl4 in the non-nucleophilic solvent CH2Cl2. Such bonding is canceled in nucleophilic solvents where opposite cis-stereochemistry is observed. The potential of thus obtained stereoisomeric SF5-aryl acrylates as dipolarophiles in the preparation of SF5-containing heterocycles is demonstrated.
Collapse
Affiliation(s)
- Maksym V Ponomarenko
- Department of Life Sciences and Chemistry, Jacobs University Bremen gGmbH , Campus Ring 1, 28759 Bremen, Germany
| | - Simon Grabowsky
- Universität Bremen , Institut für Anorganische Chemie und Kristallographie, Leobener Str. NW2, 28359 Bremen, Germany
| | - Rumpa Pal
- Universität Bremen , Institut für Anorganische Chemie und Kristallographie, Leobener Str. NW2, 28359 Bremen, Germany
| | - Gerd-Volker Röschenthaler
- Department of Life Sciences and Chemistry, Jacobs University Bremen gGmbH , Campus Ring 1, 28759 Bremen, Germany
| | - Andrey A Fokin
- Department of Organic Chemistry, Kiev Polytechnic Institute , pr. Pobedy 37, 03056 Kiev, Ukraine
| |
Collapse
|
43
|
Rajan S, Babazade R, Govindarajan SR, Pal R, You J, Mascha EJ, Khanna A, Yang M, Marcano FD, Singh AK, Kaouk J, Turan A. Perioperative factors associated with acute kidney injury after partial nephrectomy. Br J Anaesth 2016; 116:70-6. [PMID: 26675951 DOI: 10.1093/bja/aev416] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Partial nephrectomy is performed with the aim to preserve renal function. But the occurrence of postoperative acute kidney injury (AKI) can interfere with this goal. Our primary aim was to evaluate associations between pre-specified modifiable factors and estimated glomerular filtration rate after partial nephrectomy. Our secondary aims were to evaluate associations between pre-specified modifiable factors and both serum creatinine concentration and type of nephrectomy. METHODS The records of 1955 patients who underwent partial nephrectomy were collected. Postoperative estimated glomerular filtration rate (eGFR) was used as the primary outcome measure. Twenty modifiable risk factors were studied. A repeated-measures linear model with autoregressive within-subject correlation structure was used. The interaction between all the factors and type of nephrectomy was also studied. RESULTS A total of 1187 (61%) patients had no kidney injury, 647 (33%) had stage I, 80 (4%) had stage II, and 41 (2%) had stage III injury. The mean eGFR increased an estimated 0.83 (99.76% CI 0.79-0.88) ml min(-1) 1.73 m(-2) for a unit increase in baseline eGFR. Mean eGFR was 2.65 (99.76% CI: 0.13, 5.18) ml min(-1) 1.73 m(-2) lower in patients with hypertension. Mean eGFR decreased 0.42 (99.76% CI: 0.22, 0.62) ml min(-1) 1.73 m(-2) for a 10-minute longer in duration of procedure and decreased 2.09 (99.76% CI: 1.39, 2.80) ml min(-1) 1.73 m(-2) for a 10-minute longer in ischemia time. It was 3.53 (99.76% CI: 0.83, 6.23) ml min(-1) 1.73 m(-2) lower for patients who received warm ischemia as compared to cold ischemia. CONCLUSION Potentially modifiable factors associated with AKI in the postoperative period were identified as baseline renal function, preoperative hypertension, longer duration of surgical time and ischaemia time, and warm ischaemia.
Collapse
Affiliation(s)
- S Rajan
- Department of General Anesthesia, Cleveland Clinic, Cleveland, OH, USA
| | - R Babazade
- Department of Outcomes Research, Cleveland Clinic, Cleveland, OH, USA
| | - S R Govindarajan
- Department of Outcomes Research, Cleveland Clinic, Cleveland, OH, USA
| | - R Pal
- Cleveland Clinic, Cleveland, OH, USA
| | - J You
- Departments of Qualitative Health Sciences and Outcomes Research, Cleveland Clinic, Cleveland, OH, USA
| | - E J Mascha
- Departments of Qualitative Health Sciences and Outcomes Research, Cleveland Clinic, Cleveland, OH, USA
| | - A Khanna
- Department of Outcomes Research, Cleveland Clinic, Cleveland, OH, USA Surgical ICU, Cleveland Clinic, Cleveland, OH, USA
| | - M Yang
- Cleveland Clinic, Cleveland, OH, USA
| | - F D Marcano
- Department of Outcomes Research, Cleveland Clinic, Cleveland, OH, USA
| | - A K Singh
- Department of Outcomes Research, Cleveland Clinic, Cleveland, OH, USA
| | - J Kaouk
- Center for Laparoscopic and Robotic Surgery, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, OH, USA
| | - A Turan
- Department of Outcomes Research, Cleveland Clinic, 9500 Euclid Avenue, P-77, Cleveland, OH 44195, USA
| |
Collapse
|
44
|
Pal R, Hameed S, Fatima Z. Cellular iron status affects drug susceptibilities and biofilm formation of mycobacterium. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.862] [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
|
45
|
Malik M, Arora P, Sachdeva R, Sharma L, Ramachandran VG, Pal R. Elucidation of the potential disease-promoting influence of IgM apoptotic cell-reactive antibodies in lupus. Lupus 2016; 25:684-98. [DOI: 10.1177/0961203315624023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 12/01/2015] [Indexed: 12/11/2022]
Abstract
The undigested remnants of apoptosis are believed to stimulate the generation of autoantibodies in lupus. The biological properties of initiator, disease-specific IgM antibodies that specifically recognize apoptotic cells, readily detected in the sera of lupus patients, remain unclear. Apoptotic cell-reactive IgM monoclonal antibodies (generated from lupus-prone mice), as opposed to control IgM, preferentially stimulated maturation of bone marrow-derived dendritic cells (BMDCs) derived from such mice, relative to BMDCs derived from healthy mice. An influence of both antibody specificity and cell genotype was also apparent in the secretion of signature inflammatory cytokines. Immunization of such antibodies in lupus-prone animals induced increases in total serum IgG levels, with the elicited antibodies also preferentially recognizing moieties on dying cells. An expanded specificity was apparent both upon Western blot on cellular lysate and from the enhanced recognition of dsDNA, Ro60, RNP68 and Sm; the antibody most efficient in mediating autoreactive diversity, while being germline encoded, also induced the highest degree of phenotypic changes on BMDCs. Apoptotic cell-reactive IgM antibodies may therefore be potentially capable of influencing the course of systemic autoimmune disease by affecting both innate and adaptive immunity.
Collapse
Affiliation(s)
- M Malik
- Department of Microbiology, University College of Medical Sciences & Guru Teg Bahadur Hospital, Delhi, India
| | - P Arora
- National Institute of Immunology, New Delhi, India
| | - R Sachdeva
- National Institute of Immunology, New Delhi, India
| | - L Sharma
- National Institute of Immunology, New Delhi, India
| | - V G Ramachandran
- Department of Microbiology, University College of Medical Sciences & Guru Teg Bahadur Hospital, Delhi, India
| | - R Pal
- National Institute of Immunology, New Delhi, India
| |
Collapse
|
46
|
Sudharsana N, Sharma A, Kuş N, Fausto R, Luísa Ramos M, Krishnakumar V, Pal R, Guru Row T, Nagalakshmi R. Low temperature FTIR, Raman, NMR spectroscopic and theoretical study of hydroxyethylammonium picrate. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.08.066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
47
|
Sansee A, Meksawangwong S, Chainok K, Franz KJ, Gál M, Pålsson LO, Puniyan W, Traiphol R, Pal R, Kielar F. Novel aminoalkyl tris-cyclometalated iridium complexes as cellular stains. Dalton Trans 2016; 45:17420-17430. [DOI: 10.1039/c6dt02776h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Novel tris-cyclometalated luminescent iridium complexes capable of staining cells and showing in cellulo lifetimes in the microsecond regime are reported.
Collapse
Affiliation(s)
- A. Sansee
- Department of Chemistry
- Naresuan University
- Phitsanulok
- Thailand
| | | | - K. Chainok
- Department of Physics
- Faculty of Science and Technology
- Thammasat University
- Khlong Luang
- Thailand
| | - K. J. Franz
- Department of Chemistry
- Duke University
- Durham
- USA
| | - M. Gál
- Department of Chemistry
- Slovak Technical University
- Bratislava
- Slovakia
| | | | - W. Puniyan
- Department of Chemistry
- Naresuan University
- Phitsanulok
- Thailand
| | - R. Traiphol
- Laboratory of Advanced Polymers and Nanomaterials
- Department of Chemistry and Center for Innovation in Chemistry
- Naresuan Univesity
- Phitsanulok
- Thailand
| | - R. Pal
- Department of Chemistry
- Durham University
- Durham
- UK
| | - F. Kielar
- Department of Chemistry
- Naresuan University
- Phitsanulok
- Thailand
- Center of Excellence in Biomaterials
| |
Collapse
|
48
|
Prabhu G, Nagendra G, Sagar NR, Pal R, Guru Row TN, Sureshbabu VV. A Facile Synthesis of 1,5-Disubstituted Tetrazole Peptidomimetics by Desulfurization/Electrocyclization of Thiopeptides. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500384] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Girish Prabhu
- #109, Peptide Research Laboratory; Department of Studies in Chemistry; Central College Campus, Dr. B. R. Ambedkar Veedhi; Bangalore University; Bangalore 560001 India
| | - Govindappa Nagendra
- #109, Peptide Research Laboratory; Department of Studies in Chemistry; Central College Campus, Dr. B. R. Ambedkar Veedhi; Bangalore University; Bangalore 560001 India
| | - N. R. Sagar
- #109, Peptide Research Laboratory; Department of Studies in Chemistry; Central College Campus, Dr. B. R. Ambedkar Veedhi; Bangalore University; Bangalore 560001 India
| | - Rumpa Pal
- Solid State and Structural Chemistry Unit; Indian Institute of Science; Bangalore 560 012 India
| | - Tayur N. Guru Row
- Solid State and Structural Chemistry Unit; Indian Institute of Science; Bangalore 560 012 India
| | - Vommina V. Sureshbabu
- #109, Peptide Research Laboratory; Department of Studies in Chemistry; Central College Campus, Dr. B. R. Ambedkar Veedhi; Bangalore University; Bangalore 560001 India
| |
Collapse
|
49
|
Phelan E, Pal R, Henderson L, Green KMJ, Bruce IA. The management of children with Down syndrome and profound hearing loss. Cochlear Implants Int 2015; 17:52-7. [DOI: 10.1179/1754762815y.0000000019] [Citation(s) in RCA: 10] [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: 10/31/2022]
|
50
|
Santerre JL, Kolitz EB, Pal R, Rogow JA, Werner DF. Cytoplasmic phospholipase A₂ modulation of adolescent rat ethanol-induced protein kinase C translocation and behavior. Neurochem Res 2015; 40:1023-31. [PMID: 25791059 PMCID: PMC4641673 DOI: 10.1007/s11064-015-1557-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 01/27/2015] [Accepted: 03/12/2015] [Indexed: 10/23/2022]
Abstract
Ethanol consumption typically begins during adolescence, a developmental period which exhibits many age-dependent differences in ethanol behavioral sensitivity. Protein kinase C (PKC) activity is largely implicated in ethanol-behaviors, and our previous work indicates that regulation of novel PKC isoforms likely contributes to decreased high-dose ethanol sensitivity during adolescence. The cytoplasmic Phospholipase A2 (cPLA2) signaling cascade selectivity modulates novel and atypical PKC isoform activity, as well as adolescent ethanol hypnotic sensitivity. Therefore, the current study was designed to ascertain adolescent cPLA2 activity both basally and in response to ethanol, as well as it's involvement in ethanol-induced PKC isoform translocation patterns. cPLA2 expression was elevated during adolescence, and activity was increased only in adolescents following high-dose ethanol administration. Novel, but not atypical PKC isoforms translocate to cytosolic regions following high-dose ethanol administration. Inhibiting cPLA2 with AACOCF3 blocked ethanol-induced PKC cytosolic translocation. Finally, inhibition of novel, but not atypical, PKC isoforms when cPLA2 activity was elevated, modulated adolescent high-dose ethanol-sensitivity. These data suggest that the cPLA2/PKC pathway contributes to the acute behavioral effects of ethanol during adolescence.
Collapse
Affiliation(s)
- J. L. Santerre
- Department of Psychology, Binghamton University, 4400 Vestal Parkway East, Binghamton, NY 13902, USA
- Center for Development and Behavioral Neuroscience, Binghamton University, 4400 Vestal Parkway East, Binghamton, NY 13902, USA
| | - E. B. Kolitz
- Department of Psychology, Binghamton University, 4400 Vestal Parkway East, Binghamton, NY 13902, USA
| | - R. Pal
- Department of Psychology, Binghamton University, 4400 Vestal Parkway East, Binghamton, NY 13902, USA
| | - J. A. Rogow
- Department of Psychology, Binghamton University, 4400 Vestal Parkway East, Binghamton, NY 13902, USA
| | - D. F. Werner
- Department of Psychology, Binghamton University, 4400 Vestal Parkway East, Binghamton, NY 13902, USA
- Center for Development and Behavioral Neuroscience, Binghamton University, 4400 Vestal Parkway East, Binghamton, NY 13902, USA
| |
Collapse
|