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Garg R, Krishna A, Daga R, Arora S, Puri S, Kumar M. Is Quadriceps-Strengthening Exercises (QSE) in Medial-Compartment Knee Osteoarthritis with Neutral and Varus Malalignment a Paradox? - A Risk-Appraisal of Strength-Training on Disease Progression. Malays Orthop J 2024; 18:73-83. [PMID: 38638654 PMCID: PMC11023347 DOI: 10.5704/moj.2403.010] [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: 06/20/2022] [Accepted: 10/06/2023] [Indexed: 04/20/2024] Open
Abstract
Introduction The present inquiry seeks to investigate whether the current regimens of QSEs (Quadriceps-Strengthening Exercises) aggravate the disease while mitigating symptoms. Materials and methods A comparative study was conducted on 32 patients with medial compartment osteoarthritis of knees. While the neutral group of 16 patients was constituted of those with an anatomical-lateral-femoro-tibial-angle (aFTA) 176-180º, varus group comprised an equal number of patients with an aFTA >180º. A home-based 12-week strength-training program involving weekly visits to hospital for supervised sessions was administered. The outcome measures were visual-analog-scale (VAS), medial patello-femoral joint tenderness (MPFJT), time-up-and-go-test (TUGT), stair-climb test, step test, WOMAC, IKDC scores, aFTA, hip-knee-ankle (HKA) angle, lateral-tibio-femoral-joint-separation (LTFJS), and horizontal-distance-from-centre-of-knee-to-Mikulicz-line. Results There was a significant increase in quadriceps strength (p<0.01) in both groups. Values for neutral group with VAS score (p=0.01), MPFJT (p=0.01), TUGT (p=0.01), timing of the stair climb test (p=0.01), WOMAC (p<0.01), and IKDC (p=0.03) were better compared to varus group with VAS score (p=0.13), MPFJT (p=0.03), TUGT (p=0.90), timing of stair climb test (p=0.68), WOMAC (p<0.02), and IKDC (p=0.05). Varus group also showed an increase in aFTA and LTFJS in 12 patients, increase in HKA in 11, and increase in horizontal distance from the centre of knee to the Mikulicz line in 7 patients. Conclusion The present study brings to the fore the paradoxical role played by QSEs in management of medial knee OA. While there is a radiological progression of the disease in both neutral and varus mal-aligned knees more so in the latter than the former.
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Affiliation(s)
- R Garg
- Department of Orthopaedics, Maulana Azad Medical College, New Delhi, India
| | - A Krishna
- Department of Orthopaedics, Maulana Azad Medical College, New Delhi, India
| | - R Daga
- Department of Radiodiagnosis, Maulana Azad Medical College, New Delhi, India
| | - S Arora
- Department of Orthopaedics, Maulana Azad Medical College, New Delhi, India
| | - S Puri
- Department of Radiodiagnosis, Govind Ballabh Pant Hospital, New Delhi, India
| | - M Kumar
- Department of Orthopaedics, Maulana Azad Medical College, New Delhi, India
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Sharma R, Gibb AA, Barnts K, Elrod JW, Puri S. Alternative oxidase promotes high iron tolerance in Candida albicans. Microbiol Spectr 2023; 11:e0215723. [PMID: 37929974 PMCID: PMC10714975 DOI: 10.1128/spectrum.02157-23] [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] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 10/10/2023] [Indexed: 11/07/2023] Open
Abstract
IMPORTANCE The yeast C. albicans exhibits metabolic flexibility for adaptability to host niches with varying availability of nutrients including essential metals like iron. For example, blood is iron deplete, while the oral cavity and the intestinal lumen are considered iron replete. We show here that C. albicans can tolerate very high levels of environmental iron, despite an increase in high iron-induced reactive oxygen species (ROS) that it mitigates with the help of a unique oxidase, known as alternative oxidase (AOX). High iron induces AOX1/2 that limits mitochondrial accumulation of ROS. Genetic elimination of AOX1/2 resulted in diminished virulence during oropharyngeal candidiasis in high iron mice. Since human mitochondria lack AOX protein, it represents a unique target for treatment of fungal infections.
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Affiliation(s)
- Rishabh Sharma
- Oral Microbiome Research Laboratory, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania, USA
| | - Andrew A. Gibb
- Department of Cardiovascular Sciences, Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Kelcie Barnts
- Oral and Maxillofacial Pathology, Medicine and Surgery, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania, USA
| | - John W. Elrod
- Department of Cardiovascular Sciences, Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Sumant Puri
- Oral Microbiome Research Laboratory, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania, USA
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Soni N, Ora M, Jena A, Rana P, Mangla R, Ellika S, Almast J, Puri S, Meyers SP. Amino Acid Tracer PET MRI in Glioma Management: What a Neuroradiologist Needs to Know. AJNR Am J Neuroradiol 2023; 44:236-246. [PMID: 36657945 PMCID: PMC10187808 DOI: 10.3174/ajnr.a7762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 11/21/2022] [Indexed: 01/21/2023]
Abstract
PET with amino acid tracers provides additional insight beyond MR imaging into the biology of gliomas that can be used for initial diagnosis, delineation of tumor margins, planning of surgical and radiation therapy, assessment of residual tumor, and evaluation of posttreatment response. Hybrid PET MR imaging allows the simultaneous acquisition of various PET and MR imaging parameters in a single investigation with reduced scanning time and improved anatomic localization. This review aimed to provide neuroradiologists with a concise overview of the various amino acid tracers and a practical understanding of the clinical applications of amino acid PET MR imaging in glioma management. Future perspectives in newer advances, novel radiotracers, radiomics, and cost-effectiveness are also outlined.
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Affiliation(s)
- N Soni
- From the University of Rochester Medical Center (N.S., S.E., J.A., S.P., S.M.), Rochester, New York
| | - M Ora
- Sanjay Gandhi Postgraduate Institute of Medical Sciences (M.O.), Lucknow, Uttar Pradesh, India
| | - A Jena
- Indraprastha Apollo Hospital (A.J., P.R.), New Delhi, India
| | - P Rana
- Indraprastha Apollo Hospital (A.J., P.R.), New Delhi, India
| | - R Mangla
- Upstate University Hospital (R.M.), Syracuse, New York
| | - S Ellika
- From the University of Rochester Medical Center (N.S., S.E., J.A., S.P., S.M.), Rochester, New York
| | - J Almast
- From the University of Rochester Medical Center (N.S., S.E., J.A., S.P., S.M.), Rochester, New York
| | - S Puri
- From the University of Rochester Medical Center (N.S., S.E., J.A., S.P., S.M.), Rochester, New York
| | - S P Meyers
- From the University of Rochester Medical Center (N.S., S.E., J.A., S.P., S.M.), Rochester, New York
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Au S, Baraniya D, Dao J, Awan SB, Alvarez J, Sklar S, Chen T, Puri S, Al-Hebshi NN. Prolonged mask wearing does not alter the oral microbiome, salivary flow rate or gingival health status – A pilot study. Front Cell Infect Microbiol 2022; 12:1039811. [PMID: 36439237 PMCID: PMC9684305 DOI: 10.3389/fcimb.2022.1039811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 10/24/2022] [Indexed: 11/11/2022] Open
Abstract
The COVID-19 pandemic has resulted in the widespread use of N95 respirators and surgical masks, with anecdotal reports among healthcare providers and the public of xerostomia, halitosis, and gingivitis, a consortium of symptoms colloquially termed “mask mouth”. However, this has not been scientifically verified. The aim of this study was to assess changes in salivary flow rate, gingival health status and oral microbiome associated with prolonged mask use. A total of 25 dental students (mean age = 26.36 ± 1.58) were included in the study and evaluated at three time points: T1, at the end of at least 2 months of full-day mask wear (7.26 ± 1.56 hours/day); T2, at the end of a period of minimal mask use (1.13 ± 1.13 hours/day); and T3, at the end of 2-3 weeks of resuming full-day mask wear (6.93 ± 1.80 hours/day). Unstimulated whole saliva (UWS) flow rate, xerostomia (on a quantitative scale of 10), gingival index (GI) and plaque index (PI) were assessed at each time point. The salivary microbiome was characterized using 16S rRNA gene sequencing. Overall, UWS flow rates were normal (mean of 0.679 ml/min) and xerostomia, PI and GI scores were low (Mean of 3.11, 0.33 and 0.69, respectively) with no significant differences as a result of prolonged mask wearing. Similarly, there were no significant microbial changes at a false discovery rate (FDR) ≤ 0.05. However, some trends were identified using a nominal p-value cut-off of ≤ 0.01, namely Gemella sanguinis, Streptococcus sp. Oral taxon 066 and Oral taxon 058 were associated with prolonged mask wear. Trends were also seen by gender, race and age, for example an increase in P. gingivalis and P. intermedia with age. In conclusion, we found no evidence that prolonged mask wear adversely affects oral health. The findings support that the oral microbiome of healthy individuals is resilient.
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Affiliation(s)
- Sheralyn Au
- Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Divyashri Baraniya
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Jason Dao
- Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Shehar Bano Awan
- Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Jenelle Alvarez
- Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Shari Sklar
- Department of Restorative Dentistry, Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Tsute Chen
- Department of Microbiology, Forsyth Institute, Cambridge, MA, United States
| | - Sumant Puri
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Nezar N. Al-Hebshi
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
- *Correspondence: Nezar N. Al-Hebshi,
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Kuboki Y, Yaeger R, Fakih M, Strickler J, Masuishi T, Kim EH, Bestvina C, Langer C, Krauss J, Puri S, Cardona P, Chang E, Tran Q, Hong D. 45MO Sotorasib in combination with panitumumab in refractory KRAS G12C-mutated colorectal cancer: Safety and efficacy for phase Ib full expansion cohort. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.10.077] [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: 12/07/2022] Open
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Puri S, Elliott A, Soares H, Lou E, Halmos B, Langer C, Uprety D, Darabi S, Walker P, El-Deiry W, VanderWalde A, Owonikoko T, Liu S. 889MO Comparative expression of driver transcription factors in extra-pulmonary small cell carcinoma. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Seeber A, Baca Y, Xiu J, Puri S, Owonikoko T, Oliver T, Kerrigan K, Patel S, Uprety D, Mamdani H, Kulkarni A, Lopes G, Halmos B, Borghaei H, Akerley W, Liu S, Korn W, Pircher A, Wolf D, Kocher F. 1723P CLEC3B mRNA expression levels are linked to distinct genetic backgrounds, transcriptomic signatures and survival in NSCLC. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1801] [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: 11/17/2022] Open
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Kuboki Y, Yaeger R, Fakih M, Strickler J, Masuishi T, Kim E, Bestvina C, Langer C, Krauss J, Puri S, Cardona P, Chan E, Tran Q, Hong D. 315O Sotorasib in combination with panitumumab in refractory KRAS G12C-mutated colorectal cancer: Safety and efficacy for phase Ib full expansion cohort. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.453] [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: 11/01/2022] Open
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Blass BE, Puri S, Sharma R, Day BM. Antifungal properties of (2S, 4R)-Ketoconazole sulfonamide analogs. Front Drug Discov (Lausanne) 2022; 2:1000827. [PMID: 37214226 PMCID: PMC10198183 DOI: 10.3389/fddsv.2022.1000827] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Invasive candidiasis remains a significant health concern, as it is associated with a high mortality risk. In addition, the risk of infection is significantly elevated in immunocompromised patients such as those with HIV, cancer, or those taking imcmunosuppressive drugs as a result of organ transplantation. The majority of these cases are caused by C. albicans, and C. glabrata is the second most common cause. These infections are typically treated using approved antifungal agents, but the rise of drug-resistant fungi is a serious concern. As part of our on-going effort to identify novel antifungal agents, we have studied the in vitro antifungal properties of a series of sulfonamide analogs of (2S, 4R)-Ketoconazole. Herein we report on the in vitro activity against the key fungal pathogens C. albicans, and C. glabrata.
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Affiliation(s)
- Benjamin E. Blass
- Department of Pharmaceutical Sciences, Temple University School of Pharmacy, Philadelphia, PA, United States
| | - Sumant Puri
- Oral Microbiome Research Laboratory, Kornberg School of Dentistry, Temple University, Philadelphia, PA, United Stated
| | - Rishabh Sharma
- Oral Microbiome Research Laboratory, Kornberg School of Dentistry, Temple University, Philadelphia, PA, United Stated
| | - Brian M. Day
- Department of Pharmaceutical Sciences, Temple University School of Pharmacy, Philadelphia, PA, United States
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Jajodia A, Mandal G, Yadav V, Khoda J, Goyal J, Pasricha S, Puri S, Dewan A. Adding MR Diffusion Imaging and T2 Signal Intensity to Neck Imaging Reporting and Data System Categories 2 and 3 in Primary Sites of Postsurgical Oral Cavity Carcinoma Provides Incremental Diagnostic Value. AJNR Am J Neuroradiol 2022; 43:1018-1023. [PMID: 35738671 DOI: 10.3174/ajnr.a7553] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 05/03/2022] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The NI-RADS lexicon doesn't use ADC parameters and T2 weighted signal for ascribing categories. We explored ADC, DWI, and T2WI to examine the diagnostic accuracy in primary sites of postsurgical oral cavity carcinoma in the Neck Imaging Reporting and Data System (NI-RADS) categories 2 and 3. MATERIALS AND METHODS We performed a retrospective analysis in clinically asymptomatic post-surgically treated patients with oral cavity squamous cell carcinoma who underwent contrast-enhanced MRI between January 2013 and January 2016. Histopathology and follow-up imaging were used to ascertain the presence or absence of malignancy in subjects with "new enhancing lesions," which were interpreted according to the NI-RADS lexicon by experienced readers, including NI-RADS 2 and 3 lesions in the primary site. NI-RADS that included T2WI and DWI (referred to as NI-RADS A) and ADC (using the best cutoff from receiver operating characteristic curve analysis, NI-RADS B) was documented in an Excel sheet to up- or downgrade existing classic American College of Radiology NI-RADS and calculate diagnostic accuracy. RESULTS Sixty-one malignant and 23 benign lesions included in the study were assigned American College of Radiology NI-RADS 2 (n = 33) and NI-RADS 3 (n = 51) categories. The recurrence rate was 90% (46/51) for NI-RADS three, 45% (15/33) for NI-RADS 2, and 73% (61/84) overall. T2WI signal morphology was intermediate in 45 subjects (53.5%) and restricted DWI in 54 (64.2%). Sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of the American College of Radiology NI-RADS were the following: NI-RADS (75.4%, 78.3%, 90.1%, 54.5%, and 76.1%); NI-RADS A (79.1%, 81.2%, 91.9%, 59.1%, and 79.6%); and NI-RADS B (88.9%, 72.7%, 91.4%, 66.7%, and 85.1%), respectively. CONCLUSIONS Adding MR imaging diagnostic characteristics like T2WI, DWI, and ADC to the American College of Radiology NI-RADS improved diagnostic accuracy and sensitivity.
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Affiliation(s)
- A Jajodia
- From the Departments of Radiology (A.J., J.K., J.G., S.Puri.)
| | - G Mandal
- Surgical Oncology (G.M., V.Y., A.D.)
| | - V Yadav
- Surgical Oncology (G.M., V.Y., A.D.)
| | - J Khoda
- From the Departments of Radiology (A.J., J.K., J.G., S.Puri.)
| | - J Goyal
- From the Departments of Radiology (A.J., J.K., J.G., S.Puri.)
| | - S Pasricha
- Laboratory & Histopathology (S.Pasricha.), Rajiv Gandhi Cancer Institute, Delhi, India
| | - S Puri
- From the Departments of Radiology (A.J., J.K., J.G., S.Puri.)
| | - A Dewan
- Surgical Oncology (G.M., V.Y., A.D.)
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Tripathi A, Nahar A, Sharma R, Kanaskie T, Al-Hebshi N, Puri S. High iron-mediated increased oral fungal burden, oral-to-gut transmission, and changes to pathogenicity of Candida albicans in oropharyngeal candidiasis. J Oral Microbiol 2022; 14:2044110. [PMID: 35251523 PMCID: PMC8896197 DOI: 10.1080/20002297.2022.2044110] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Background Aim Methods Results Conclusion
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Affiliation(s)
- Aparna Tripathi
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania, USA
| | - Anubhav Nahar
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania, USA
| | - Rishabh Sharma
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania, USA
| | - Trevor Kanaskie
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania, USA
| | - Nezar Al-Hebshi
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania, USA
| | - Sumant Puri
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania, USA
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Puri S, Yaddanapudi S, Menon P. Peri‐operative management of a child with ROHHAD‐NET syndrome undergoing neural crest tumour excision. Anaesth Rep 2022; 10:e12172. [DOI: 10.1002/anr3.12172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2022] [Indexed: 11/05/2022] Open
Affiliation(s)
- S. Puri
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research (PGIMER) Chandigarh India
| | - S. Yaddanapudi
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research (PGIMER) Chandigarh India
| | - P. Menon
- Department of Paediatric Surgery Postgraduate Institute of Medical Education and Research (PGIMER) Chandigarh India
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Abstract
Candida-associated denture stomatitis is a recurring disease affecting up to 67% of denture wearers. Poly(methyl methacrylate) (PMMA) remains the main material employed in the fabrication of dentures due to its desirable physical, mechanical, and aesthetic properties. However, the improvement of its antimicrobial properties remains a challenge. To address this need, we developed PMMA composite filled with piezoelectric nanoparticles of barium titanate (BaTiO3) for therapeutic effects. Candida albicans biofilms were cultivated on the surface of the composites under continuous cyclic mechanical loading to activate the piezoelectric charges and to resemble mastication patterns. The interactions between biofilms and biomaterials were evaluated by measuring the biofilm biomass, metabolic activity, and the number of viable cells. To explore the antifungal mechanisms, changes in the expression of genes encoding adhesins and superoxide dismutase were assessed using reverse transcription-polymerase chain reaction. With the addition of piezoelectric nanoparticles, we observed a significant reduction in the biofilm formation and interference in the yeast-to-hyphae transition compared to the standard PMMA. Moreover, we observed that the cyclic deformation of biomaterial surfaces without antifungal agents produced increased biomass, metabolic activity, and a number of viable cells compared to the static/no-deformed surfaces. Cyclic deformation appears to be a novel mechanobiological signal that enables pathogenicity and virulence of C. albicans cells with increased expression of the yeast-to-hyphae transition genes. The outcome of this study opens new opportunities for the design of antifungal dentures for improved clinical service and reduced need for cleaning methods.
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Affiliation(s)
- Carolina Montoya
- Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University. Philadelphia, Pennsylvania 19140, United States
| | - Julia Kurylec
- Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University. Philadelphia, Pennsylvania 19140, United States
| | - Divyashri Baraniya
- Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University. Philadelphia, Pennsylvania 19140, United States
| | - Aparna Tripathi
- Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University. Philadelphia, Pennsylvania 19140, United States
| | - Sumant Puri
- Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University. Philadelphia, Pennsylvania 19140, United States
| | - Santiago Orrego
- Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University. Philadelphia, Pennsylvania 19140, United States.,Bioengineering Department, College of Engineering, Temple University. Philadelphia, Pennsylvania 19122, United States
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Kerrigan K, Sinnott J, Haaland B, Puri S, Akerley W, Patel S. P63.11 Real-World Survival Outcomes of Patients with Limited Stage Small Cell Lung Cancer (LS-SCLC) by Choice of Platinum Chemotherapy. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.667] [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: 10/20/2022]
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Parsons M, Johnson S, Tao R, Hitchcock Y, Puri S, Akerley W, Kokeny K. P27.01 Patterns of Care and Outcomes in Clinical T3N0M0 Non-Small Cell Lung Cancer Without Invasion of Other Structures. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.384] [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: 10/20/2022]
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16
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Kerrigan K, Puri S, Sinnott J, Haaland B, Akerley W, Patel S. P89.05 Management of Patients with EGFR and ALK-Mutated Advanced Non-Small Cell Lung Cancer Post-TKI Therapy – A Real-World Survival Analysis. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.1270] [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: 11/25/2022]
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Kerrigan K, Chipman J, Jo Y, Haaland B, Johnson E, Puri S, Varghese T, Akerley W, Patel S. FP05.01 Real-World Survival Outcomes of Patients with Malignant Pleural Mesothelioma by Choice of Second-line Therapy. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.093] [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: 11/15/2022]
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Elayavel R, Bandyopadhyay A, Dwivedi A, Bhatia N, Puri S, Jain K. Accidental insertion of a central venous catheter into the pericardial sac without traversing vascular structures. Anaesth Rep 2020; 8:201-202. [PMID: 33345193 DOI: 10.1002/anr3.12089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/24/2020] [Indexed: 11/12/2022] Open
Affiliation(s)
- R Elayavel
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research Chandigarh India
| | - A Bandyopadhyay
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research Chandigarh India
| | - A Dwivedi
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research Chandigarh India
| | - N Bhatia
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research Chandigarh India
| | - S Puri
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research Chandigarh India
| | - K Jain
- Department of Anaesthesia and Intensive Care Postgraduate Institute of Medical Education and Research Chandigarh India
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Baraniya D, Jain V, Lucarelli R, Tam V, Vanderveer L, Puri S, Yang M, Al-Hebshi NN. Screening of Health-Associated Oral Bacteria for Anticancer Properties in vitro. Front Cell Infect Microbiol 2020; 10:575656. [PMID: 33123499 PMCID: PMC7573156 DOI: 10.3389/fcimb.2020.575656] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 09/02/2020] [Indexed: 12/24/2022] Open
Abstract
While extensive literature exists about the role of oral bacterial pathogens like Porphyromonas gingivalis and Fusobacterium nucleatum in oral squamous cell carcinoma (OSCC), the role of health-associated species has been largely unexplored. In this study, we assessed the effect of Streptococcus mitis, Rothia mucilaginosa, Neisseria flavescens, Haemophilus parainfluenzae, Lautropia mirabilis, and Veillonella parvula on proliferation and expression of marker genes (IL-6, TNF-α, MMP3, CD36, CCD1, and NANOG) in OSCC cell lines CAL27, SCC25, and SCC4. Porphyromonas gingivalis was included as a pathogenic control. Both bacterial lysates (3 concentrations) and live cells (3 MOIs) were tested. S. mitis, H. parainfluenzae, and N. flavescens resulted in substantial, dose-dependent reduction of proliferation, which was found to be mediated by H2O2 for the former and intracellular infection in the latter two species. However, only H. parainfluenzae showed differential antiproliferative effect against the cancer cell lines vs. the normal control (TIGKs). In the gene expression assays, the health-associated species mostly downregulated CD36, a gene that plays an important role in tumor growth and metastasis, while P. gingivalis upregulated it. IL6 and TNF expression, on the other hand, was upregulated by almost all species, particularly the Gram-negatives including P. gingivalis. The effect on other genes was less evident and varied significantly by cell line. This exploratory study is the first insight into how health-associated bacteria may interact with OSCC. Further studies to explore whether the observed effects may have implications for the prevention or treatment of oral cancer are warranted.
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Affiliation(s)
- Divyashri Baraniya
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Vinay Jain
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Ronald Lucarelli
- Department of Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, United States
| | - Vincent Tam
- Department of Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, United States
| | - Lisa Vanderveer
- Fox Chase Cancer Center, Temple University Health System, Philadelphia, PA, United States
| | - Sumant Puri
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Maobin Yang
- Regenerative Research Laboratory, Department of Endodontology, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Nezar Noor Al-Hebshi
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States.,Fox Chase Cancer Center, Temple University Health System, Philadelphia, PA, United States
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20
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Campagne-Ibarcq P, Eickbusch A, Touzard S, Zalys-Geller E, Frattini NE, Sivak VV, Reinhold P, Puri S, Shankar S, Schoelkopf RJ, Frunzio L, Mirrahimi M, Devoret MH. Quantum error correction of a qubit encoded in grid states of an oscillator. Nature 2020; 584:368-372. [DOI: 10.1038/s41586-020-2603-3] [Citation(s) in RCA: 133] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 06/12/2020] [Indexed: 11/09/2022]
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21
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Tripathi A, Liverani E, Tsygankov AY, Puri S. Iron alters the cell wall composition and intracellular lactate to affect Candida albicans susceptibility to antifungals and host immune response. J Biol Chem 2020; 295:10032-10044. [PMID: 32503842 DOI: 10.1074/jbc.ra120.013413] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 05/27/2020] [Indexed: 12/19/2022] Open
Abstract
Fungal pathogen Candida albicans has a complex cell wall consisting of an outer layer of mannans and an inner layer of β-glucans and chitin. The fungal cell wall is the primary target for antifungals and is recognized by host immune cells. Environmental conditions such as carbon sources, pH, temperature, and oxygen tension can modulate the fungal cell wall architecture. Cellular signaling pathways, including the mitogen-activated protein kinase (MAPK) pathways, are responsible for sensing environmental cues and mediating cell wall alterations. Although iron has recently been shown to affect β-1,3-glucan exposure on the cell wall, we report here that iron changes the composition of all major C. albicans cell wall components. Specifically, high iron decreased the levels of mannans (including phosphomannans) and chitin; and increased β-1,3-glucan levels. These changes increased the resistance of C. albicans to cell wall-perturbing antifungals. Moreover, high iron cells exhibited adequate mitochondrial functioning; leading to a reduction in accumulation of lactate that signals through the transcription factor Crz1 to induce β-1,3-glucan masking in C. albicans We show here that iron-induced changes in β-1,3-glucan exposure are lactate-dependent; and high iron causes β-1,3-glucan exposure by preventing lactate-induced, Crz1-mediated inhibition of activation of the fungal MAPK Cek1. Furthermore, despite exhibiting enhanced antifungal resistance, high iron C. albicans cells had reduced survival upon phagocytosis by macrophages. Our results underscore the role of iron as an environmental signal in multiple signaling pathways that alter cell wall architecture in C. albicans, thereby affecting its survival upon exposure to antifungals and host immune response.
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Affiliation(s)
- Aparna Tripathi
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania, USA
| | - Elisabetta Liverani
- Sol Sherry Thrombosis Research Center, Temple University School of Medicine, Temple University Hospital, Philadelphia, Pennsylvania, USA
| | - Alexander Y Tsygankov
- Sol Sherry Thrombosis Research Center, Temple University School of Medicine, Temple University Hospital, Philadelphia, Pennsylvania, USA.,Department of Microbiology and Immunology, Temple University School of Medicine, Philadelphia, Pennsylvania, USA
| | - Sumant Puri
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Kornberg School of Dentistry, Temple University, Philadelphia, Pennsylvania, USA
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22
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Sinha N, Puri V, Kumar V, Nada R, Rastogi A, Jha V, Puri S. SAT-164 EVALUATION OF miR-663a EXPRESSION IN HUMAN KIDNEY PROXIMAL TUBULAR CELLS DERIVED EXOSOMES AND ITS PARENT CELLS UNDER DIABETIC STATE. Kidney Int Rep 2020. [DOI: 10.1016/j.ekir.2020.02.174] [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] Open
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23
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Baraniya D, Chen T, Nahar A, Alakwaa F, Hill J, Tellez M, Ismail A, Puri S, Al-Hebshi NN. Supragingival mycobiome and inter-kingdom interactions in dental caries. J Oral Microbiol 2020; 12:1729305. [PMID: 32158514 PMCID: PMC7048226 DOI: 10.1080/20002297.2020.1729305] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 01/09/2020] [Accepted: 01/13/2020] [Indexed: 01/06/2023] Open
Abstract
Background: Recent studies have reveled the presence of a complex fungal community (mycobiome) in the oral cavity. However, the role of oral mycobiome in dental caries and its interaction with caries-associated bacteria is not yet clear. Methods: Whole-mouth supragingival plaque samples from 30 children (6–10 years old) with no caries, early caries, or advanced caries were sequenced for internal transcribed spacer 2 (ITS-2). The mycobiome profiles were correlated with previously published bacteriome counterparts. Interaction among selected fungal and bacterial species was assessed by co-culture or spent media experiments. Results: Fungal load was extremely low. Candida, Malassezia, Cryptococcus, and Trichoderma spp. were the most prevalent/abundant taxa. Advanced caries was associated with significantly higher fungal load and prevalence/abundance of Candida albicans. Cryptococcus neoformans and Candida sake were significantly over-abundant in early caries, while Malassezia globosa was significantly enriched in caries-free subjects. C. albicans correlated with Streptococcus mutans and Scardovia wiggsiae among other caries-associated bacteria, while M. globosa inversely correlated with caries-associated bacteria. In-vitro, M. globosa demonstrated inhibitory properties against S. mutans. Conclusions: the results substantiate the potential role of the oral mycobiome, primarily Candida species, in dental caries. Inter-kingdom correlations and inhibition of S. mutans by M. globosa are worth further investigation.
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Affiliation(s)
- Divyashri Baraniya
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Tsute Chen
- Department of Microbiology, Forsyth Institute, Cambridge, MA, USA
| | - Anubhav Nahar
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Fadhl Alakwaa
- Department of Computational Medicine and Bioinformatics, University Michigan, Ann Arbor, MI, USA
| | - Jennifer Hill
- Department of Pediatric Dentistry, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Marisol Tellez
- Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Amid Ismail
- Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Sumant Puri
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Nezar Noor Al-Hebshi
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
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24
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Puri S, Gray J. IBS24.01 IO/CT First line Always. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Puri S, Guadalupe NR, Niyongere S, Boyle T, Thapa R, Chen D, Noyes D, Chatwal M, Antonia S, Gray J. P2.01-06 Phase I Study of Nivolumab and Ipilimumab Combined with Nintedanib in Advanced Non-Small Cell Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Tirella A, Kloc-Muniak K, Good L, Ridden J, Ashford M, Puri S, Tirelli N. CD44 targeted delivery of siRNA by using HA-decorated nanotechnologies for KRAS silencing in cancer treatment. Int J Pharm 2019; 561:114-123. [DOI: 10.1016/j.ijpharm.2019.02.032] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/21/2019] [Accepted: 02/18/2019] [Indexed: 12/15/2022]
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27
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Touzard S, Kou A, Frattini NE, Sivak VV, Puri S, Grimm A, Frunzio L, Shankar S, Devoret MH. Gated Conditional Displacement Readout of Superconducting Qubits. Phys Rev Lett 2019; 122:080502. [PMID: 30932609 DOI: 10.1103/physrevlett.122.080502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Indexed: 06/09/2023]
Abstract
We have realized a new interaction between superconducting qubits and a readout cavity that results in the displacement of a coherent state in the cavity, conditioned on the state of the qubit. This conditional state, when it reaches the cavity-following, phase-sensitive amplifier, matches its measured observable, namely, the in phase quadrature. In a setup where several qubits are coupled to the same readout resonator, we show it is possible to measure the state of a target qubit with minimal dephasing of the other qubits. Our results suggest novel directions for faster readout of superconducting qubits and implementations of bosonic quantum error-correcting codes.
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Affiliation(s)
- S Touzard
- Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA
| | - A Kou
- Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA
| | - N E Frattini
- Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA
| | - V V Sivak
- Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA
| | - S Puri
- Yale Quantum Institute, Yale University, New Haven, Connecticut 06520, USA
| | - A Grimm
- Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA
| | - L Frunzio
- Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA
| | - S Shankar
- Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA
| | - M H Devoret
- Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA
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28
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Al-Hebshi NN, Baraniya D, Chen T, Hill J, Puri S, Tellez M, Hasan NA, Colwell RR, Ismail A. Metagenome sequencing-based strain-level and functional characterization of supragingival microbiome associated with dental caries in children. J Oral Microbiol 2018; 11:1557986. [PMID: 30671194 PMCID: PMC6327923 DOI: 10.1080/20002297.2018.1557986] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 12/05/2018] [Accepted: 12/07/2018] [Indexed: 12/15/2022] Open
Abstract
Studies of the microbiome associated with dental caries have largely relied on 16S rRNA sequence analysis, which is associated with PCR biases, low taxonomic resolution, and inability to accurately study functions. Here, we employed whole metagenome shotgun sequencing, coupled with high-resolution analysis algorithm, to analyze supragingival microbiomes from 30 children with or without dental caries. A total of 726 bacterial strains belonging to 406 species, in addition to 34 bacteriophages were identified. A core bacteriome was identified at the species and strain levels. Species of Prevotella, Veillonella, as yet unnamed Actinomyces, and Atopobium showed strongest association with caries; Streptococcus sp. AS14 and Leptotrichia sp. Oral taxon 225, among others, were overabundant in caries-free. For several species, the association was strain-specific. Furthermore, for some species, e.g. Streptococcus mitis and Streptococcus sanguinis, sister strains showed differential associations. Noteworthy, associations were also identified for phages: Streptococcus phage M102 with caries and Haemophilus phage HP1 with caries-free. Functionally, potentially relevant features were identified including urate, vitamin K2, and polyamine biosynthesis in association with caries; and three deiminases and lactate dehydrogenase with health. The results demonstrate new associations between the microbiome and dental caries at the strain and functional levels that need further investigation.
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Affiliation(s)
- Nezar Noor Al-Hebshi
- Oral Microbiome Research Laboratory, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Divyashri Baraniya
- Oral Microbiome Research Laboratory, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Tsute Chen
- Department of Microbiology, Forsyth Institute, Cambridge, MA, USA
| | - Jennifer Hill
- Department of Pediatric Dentistry and Community Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Sumant Puri
- Oral Microbiome Research Laboratory, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Marisol Tellez
- Department of Pediatric Dentistry and Community Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Nur A Hasan
- CosmosID Inc., Rockville, MD, USA.,University of Maryland Institute for Advanced Computer Studies, University of Maryland, College Park, MD, USA
| | - Rita R Colwell
- CosmosID Inc., Rockville, MD, USA.,University of Maryland Institute for Advanced Computer Studies, University of Maryland, College Park, MD, USA.,Maryland Pathogen Research Institute, University of Maryland, College Park, MD, USA
| | - Amid Ismail
- Department of Pediatric Dentistry and Community Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
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29
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Abstract
This communication is regarding the recent editing of the genome of the human embryo with CRISPR/Cas9 which generated a debate amongst the biological scientists around the world. Editing human germline genes may act as godsend in some serious genetic and other disorders as the genes related to these disorders can be replaced effectively. The scientists are in dilemma whether the human germline gene modification is a boon or bane for the human society. Though editing human germline genes may be an answer to many serious genetic disorders however; it may have unpredictable effects on future generations. The ethical issues regarding the germline editing need further discussion which may have implications on human race and on-going human evolution. Thus, the researchers need to be doubly cautious and some stringent regulations should be framed regarding the various aspects of germ line gene modifications and any potential conflict with nature for future outcome.
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Affiliation(s)
- K Krishan
- Associate Professor and Chair, Department of Anthropology, Panjab University, Sector-14, Chandigarh, India
| | - T Kanchan
- Associate Professor - Department of Forensic Medicine and Toxicology, All India Institute of Medical Sciences, Jodhpur, India
| | - B Singh
- Research Scholar - Department of Anthropology, Panjab University, Sector-14, Chandigarh, India
| | - N Baryah
- Research Scholar - Department of Anthropology, Panjab University, Sector-14, Chandigarh, India
| | - S Puri
- Professor - Biotechnology Department, University Institute of Engineering & Technology, Panjab University, Chandigarh, India
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30
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Puri S, Aldhahi M, Chin LM, Jain V, Herrick JE. 0138 Characterization of Oxygen Uptake On- and Off- Kinetics in Patients with Obstructive Sleep Apnea. Sleep 2018. [DOI: 10.1093/sleep/zsy061.137] [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: 11/14/2022] Open
Affiliation(s)
- S Puri
- George Mason University, Fairfax, VA
| | - M Aldhahi
- George Mason University, Fairfax, VA
| | - L M Chin
- George Mason University, Fairfax, VA
| | - V Jain
- George Washington University, Washington, DC
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31
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Puri S, Sharma N, Newcombe R, Kaushik M, Al-Attar M, Pascaline S, Hajaj M, Wallis M, Elsberger B, Goyal A. Axillary tumour burden in women with one abnormal node on ultrasound compared to women with multiple abnormal nodes. Clin Radiol 2018; 73:391-395. [DOI: 10.1016/j.crad.2017.12.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 12/14/2017] [Indexed: 11/27/2022]
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32
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Norris HL, Friedman J, Chen Z, Puri S, Wilding G, Edgerton M. Salivary metals, age, and gender correlate with cultivable oral Candida carriage levels. J Oral Microbiol 2018; 10:1447216. [PMID: 29686781 PMCID: PMC5907636 DOI: 10.1080/20002297.2018.1447216] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 02/27/2018] [Indexed: 02/06/2023] Open
Abstract
Background: Little is known about the normal range of metal levels in unstimulated saliva, nor whether these might impact Candida carriage in healthy individuals. Both are important in determining which populations are at risk for candidiasis, as the availability of metal ions can influence the growth and pathogenesis of Candida albicans. Objective: We quantified salivary metals of healthy individuals to determine the correlation with C. albicans oral colonization. Design: Unstimulated whole saliva was collected from healthy adults and plated to determine fungal carriage, and metal content was measured using ICP-mass spectrometry (ICP-MS). Results: Zinc was most abundant, followed by iron, copper, manganese, and nickel. Cultivable oral Candida carriage was found in 48% of people. Total protein levels did not differ in salivas from donors with or without carriage. However, innate fungicidal activity was increased in donors with carriage; correlations between levels of several metals were stronger in salivas with fungal carriage, indicating a shift in the oral environment. Concentrations of copper and manganese, as well as age and gender, were significantly predictive of carriage levels in a multiple regression model. Conclusions: Salivary copper and manganese content along with age and gender could be used as a predictive metric for individuals that are more susceptible to Candida overgrowth.
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Affiliation(s)
- Hannah L Norris
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - Justin Friedman
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - Ziqiang Chen
- Department of Biostatistics, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, USA
| | - Sumant Puri
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA.,Department of Pediatric Dentistry and Community Oral Health Sciences, Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Gregory Wilding
- Department of Biostatistics, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, USA
| | - Mira Edgerton
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
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33
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Abstract
We present a comprehensive Monte Carlo study of domain growth in the random-bond XY model with nonconserved kinetics. The presence of quenched disorder slows down domain growth in d=2,3. In d=2, we observe power-law growth with a disorder-dependent exponent on the time scales of our simulation. In d=3, we see the signature of an asymptotically logarithmic growth regime. The scaling functions for the real-space correlation function are seen to be independent of the disorder. However, the same does not apply for the two-time autocorrelation function, demonstrating the breakdown of superuniversality.
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Affiliation(s)
- M Kumar
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India
| | - S Chatterjee
- Indian Association for the Cultivation of Science, Kolkata-700032, India
| | - R Paul
- Indian Association for the Cultivation of Science, Kolkata-700032, India
| | - S Puri
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India
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34
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Jephthah S, Henriques J, Cragnell C, Puri S, Edgerton M, Skepö M. Structural Characterization of Histatin 5-Spermidine Conjugates: A Combined Experimental and Theoretical Study. J Chem Inf Model 2017; 57:1330-1341. [PMID: 28586222 DOI: 10.1021/acs.jcim.7b00150] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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
Histatin 5 (Hst5) is a naturally occurring antimicrobial peptide that acts as the first line of defense against oral candidiasis. It has been shown that conjugation of the active Hst5 fragment, Hst54-15, and the polyamine spermidine (Spd) improves the candidacidal effect. Knowledge about the structure of these conjugates is, however, very limited. Thus, the aim of this study was to characterize the structural properties of the Hst54-15-Spd conjugates by performing atomistic molecular dynamics simulations in combination with small-angle X-ray scattering. It was shown that the Hst54-15-Spd conjugates adopt extended and slightly rigid random coil conformations without any secondary structure in aqueous solution. It is hypothesized that the increased fungal killing potential of Hst54-15-Spd, in comparison with the Spd-Hst54-15 conjugate, is due to the more extended conformations of the former, which cause the bonded Spd molecule to be more accessible for recognition by polyamine transporters in the cell.
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Affiliation(s)
- Stephanie Jephthah
- Division of Theoretical Chemistry, Lund University , Post Office Box 124, S-221 00 Lund, Sweden
| | - João Henriques
- Division of Theoretical Chemistry, Lund University , Post Office Box 124, S-221 00 Lund, Sweden
| | - Carolina Cragnell
- Division of Theoretical Chemistry, Lund University , Post Office Box 124, S-221 00 Lund, Sweden
| | - Sumant Puri
- Pediatrics and Community Oral Health Sciences, Temple University , Philadelphia, Pennsylvania 19147, United States
| | - Mira Edgerton
- Department of Oral Biology, University at Buffalo , Buffalo, New York 14214-3092, United States
| | - Marie Skepö
- Division of Theoretical Chemistry, Lund University , Post Office Box 124, S-221 00 Lund, Sweden
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35
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Puri S, Aldhahi M, Chin LM, Herrick JE. 0618 PULMONARY OXYGEN UPTAKE ON-KINETICS DURING SUBMAXIMAL TREADMILL WALKING IN ADULTS WITH OBSTRUCTIVE SLEEP APNEA. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.617] [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
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36
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Du H, Puri S, McCall A, Norris HL, Russo T, Edgerton M. Human Salivary Protein Histatin 5 Has Potent Bactericidal Activity against ESKAPE Pathogens. Front Cell Infect Microbiol 2017; 7:41. [PMID: 28261570 PMCID: PMC5309243 DOI: 10.3389/fcimb.2017.00041] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 02/03/2017] [Indexed: 11/13/2022] Open
Abstract
ESKAPE (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumanni, Pseudomonas aeruginosa, and Enterobacter species) pathogens have characteristic multiple-drug resistance and cause an increasing number of nosocomial infections worldwide. Peptide-based therapeutics to treat ESKAPE infections might be an alternative to conventional antibiotics. Histatin 5 (Hst 5) is a salivary cationic histidine-rich peptide produced only in humans and higher primates. It has high antifungal activity against Candida albicans through an energy-dependent, non-lytic process; but its bactericidal effects are less known. We found Hst 5 has bactericidal activity against S. aureus (60–70% killing) and A. baumannii (85–90% killing) in 10 and 100 mM sodium phosphate buffer (NaPB), while killing of >99% of P. aeruginosa, 60–80% E. cloacae and 20–60% of E. faecium was found in 10 mM NaPB. Hst 5 killed 60% of biofilm cells of P. aeruginosa, but had reduced activity against biofilms of S. aureus and A. baumannii. Hst 5 killed 20% of K. pneumonia biofilm cells but not planktonic cells. Binding and uptake studies using FITC-labeled Hst 5 showed E. faecium and E. cloacae killing required Hst 5 internalization and was energy dependent, while bactericidal activity was rapid against P. aeruginosa and A. baumannii suggesting membrane disruption. Hst 5-mediated killing of S. aureus was both non-lytic and energy independent. Additionally, we found that spermidine conjugated Hst 5 (Hst5-Spd) had improved killing activity against E. faecium, E. cloacae, and A. baumannii. Hst 5 or its derivative has antibacterial activity against five out of six ESKAPE pathogens and may be an alternative treatment for these infections.
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Affiliation(s)
- Han Du
- Department of Oral Biology, School of Dental Medicine, University at Buffalo Buffalo, NY, USA
| | - Sumant Puri
- Department of Oral Biology, School of Dental Medicine, University at Buffalo Buffalo, NY, USA
| | - Andrew McCall
- Department of Oral Biology, School of Dental Medicine, University at Buffalo Buffalo, NY, USA
| | - Hannah L Norris
- Department of Oral Biology, School of Dental Medicine, University at Buffalo Buffalo, NY, USA
| | - Thomas Russo
- Veterans Administration Western New York Healthcare SystemBuffalo, NY, USA; The Department of Medicine, University at BuffaloBuffalo, NY, USA; Department of Microbiology and Immunology, University at BuffaloBuffalo, NY, USA; The Witebsky Center for Microbial Pathogenesis, University at BuffaloBuffalo, NY, USA
| | - Mira Edgerton
- Department of Oral Biology, School of Dental Medicine, University at Buffalo Buffalo, NY, USA
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Abstract
Pregnancy-related acute kidney injury (PRAKI) contributes to 3–7% of overall acute kidney injury (AKI) cases in Indian subcontinent. The aim of this study was to determine the outcomes of PRAKI and risk factors associated with renal injury and maternal mortality. One hundred and sixty-five patients with PRAKI, seen at M. S. Ramaiah Medical College between 2005 and 2014, were included in this, observational study. AKI was analyzed in terms of maximal stage of renal injury attained as per Risk, Injury, Failure, Loss of function, and End-stage renal disease (RIFLE) criteria. Outcomes included requirement for renal replacement therapy (RRT), maternal, and fetal mortality. Incidence of PRAKI was 1.56%, and the mean age of the study population was 25 years. Fifty percent of the patients were diagnosed with PRAKI during their first pregnancy. PRAKI was observed most commonly in the postpartum period (60%), followed by third trimester (32%); as per RIFLE criteria, failure was seen in 36% and injury in 34%. Thirty percent of cases required RRT. Sepsis (59%), pre-eclampsia, and eclampsia (56%) were the leading causes of PRAKI, while sepsis was the leading cause of maternal mortality. Maternal and fetal mortality were 20% and 22%, respectively. In univariate analysis, shock, hemorrhage requiring transfusion of >5 units packed red blood cells, oliguria, and “Loss” category of RIFLE were significantly associated with mortality. Majority of the patients (57%) required Intensive Care Unit care with a mean duration of admission at 7.3 days, and 75% was diagnosed with AKI at the time of admission. We report the lowest incidence of PRAKI in contemporary Indian literature. PRAKI was associated with high maternal and fetal mortality, with sepsis being the leading cause. No association was noted between mortality and initial stages of RIFLE criteria.
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Affiliation(s)
- E Mahesh
- Department of Nephrology, M. S. Ramaiah Medical College, Bengaluru, Karnataka, India
| | - S Puri
- Department of Nephrology, M. S. Ramaiah Medical College, Bengaluru, Karnataka, India
| | - V Varma
- Department of Nephrology, M. S. Ramaiah Medical College, Bengaluru, Karnataka, India
| | - P R Madhyastha
- Department of Nephrology, M. S. Ramaiah Medical College, Bengaluru, Karnataka, India
| | - S Bande
- Department of Nephrology, M. S. Ramaiah Medical College, Bengaluru, Karnataka, India
| | - K C Gurudev
- Department of Nephrology, M. S. Ramaiah Medical College, Bengaluru, Karnataka, India
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Abstract
The oral cavity is a unique niche where Candida albicans infections occur in immunocompetent as well as immunosuppressed individuals. Here we critically review the significance of human innate immune response in preventing oral candidiasis. One important line of defense against oropharyngeal candidiasis is the oral microbiota that prevents infection by competing for space and nutrients as well as by secreting antagonistic molecules and triggering local inflammatory responses. C. albicans is able to induce mucosal defenses through activation of immune cells and production of cytokines. Also, saliva contains various proteins that affect C. albicans growth positively by promoting mucosal adherence and negatively through immune exclusion and direct fungicidal activity. We further discuss the role of saliva in unifying host innate immune defenses against C. albicans as a communicating medium and how C. albicans overgrowth in the oral cavity may be a result of aberrations ranging from microbial dysbiosis and salivary dysfunction to epithelial damage. Last we underscore select oral diseases in which C. albicans is a contributory microorganism in immune-competent individuals.
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Affiliation(s)
- O Salvatori
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - S Puri
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - S Tati
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - M Edgerton
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
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Sheth K, Mehta T, Sheth V, Soni R, Puri S, Parke A. SAT0405 Risk of Status Epilepticus and Intractable Epilepsy in Systemic Lupus Erythematosus Patients with Antiphospholipid Antibodies. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5335] [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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Mehta T, Sheth K, Puri S, Soni R, Sheth V, Parke A. THU0352 Risk of Status Epilepticus and Intractable Epilepsy in Systemic Lupus Erythematosus Patients with Lupus Nephritis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5371] [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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Puri S, Ashat M, Pandey A, Goel NK, Singh A, Kaushal V. Socio-demographic characteristics of cancer patients: hospital based cancer registry in a tertiary care hospital of India. Indian J Cancer 2015; 51:1-4. [PMID: 24947086 DOI: 10.4103/0019-509x.134593] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIM To determine the socio-demographic characteristics of cancer patients. MATERIALS AND METHODS Review of the Cancer registry, and patient interview. Information on socio-demographic profile, medical history, family history and previous treatment, if any, was retrieved from the patient. If the patient couldn't be contacted then information was taken from pathology/radiotherapy or medical records department. RESULTS A total of 684 patients participated in the study. More than 40% of males and 53.7% of females were illiterate, P < 0.05. The majority (33.5%) of participants were of low socioeconomic status. The most frequently reported cancer (ca) in males it was ca lung (40.9) and ca oesophagus (9.8). In females most common cancer were ca breast (23.9) followed by ca cervix (11.7).
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Affiliation(s)
| | - M Ashat
- Department of Community Medicine, Government Medical College and Hospital Sec 32, Chandigarh, India
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Abstract
The understanding of the genomics of the renal tissue has gathered a considerable interest and is making rapid progress. The molecular mechanisms as well as the precise function of the associated molecular components toward renal pathophysiology have recently been realized. For the cystic kidney disease, the regulation of gene expression affecting epithelial cells proliferation, apoptosis as well as process of differentiation/de-differentiation represent key molecular targets. For the cystic disorders, molecular targets have been identified, which besides lending heterogeneity to cysts may also provide tools to unravel their functional importance to understand the renal tissue homeostasis. This review focuses on providing comprehensive information about the transcriptional regulatory role of hepatocyte nuclear factor-1β, a homeoprotein, as well as its interacting partners in renal tissue development and pathophysiology.
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Affiliation(s)
- V Singh
- Department of Biochemistry, Panjab University, Chandigarh, India
| | - S K Singla
- Department of Biochemistry, Panjab University, Chandigarh, India
| | - V Jha
- Department of Nephrology, PGIMER, Chandigarh, India
| | - V Puri
- Centre for Systems Biology and Bioinformatics, Under University Institute of Emerging Areas in Science and Technology, Panjab University, Chandigarh, India
| | - S Puri
- Biotechnology Branch, University Institute of Engineering and Technology, Chandigarh, India ; Centre for Stem Cell and Issue Engineering, University Institute of Emerging Areas in Science and Technology, Panjab University, Chandigarh, India
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Thapa P, Mishra SR, Bista B, Dhungana RR, Adhikari N, Soti L, Puri S, Aryal KK. Social Consequences of Alcohol Use among Urban Poor: A Cross-sectional Study in Kathmandu Valley. J Nepal Health Res Counc 2015; 13:54-58. [PMID: 26411714] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
BACKGROUND Nepal is not an exception to alcohol use; urban poor are more prone than the general population. The question of social consequences of alcohol use among urban poor remains largely unanswered in Nepal. Study explored the alcohol linked social consequences among the urban poor of Kathmandu Valley. METHODS Taking 422 urban poor from four squatter settlements of Kathmandu Valley, a cross-sectional study was carried out. A series of univariate and bivariate analysis were performed in R version 3.1.2. RESULTS Four out of 10 current drinkers (42.86%, 95% CI: 31.4-54.3) encountered various social consequences. The number one consequence hitting 23.19% drinkers was money loss. Male drinkers were 4.43 times (95% CI: 1.810.8) more likely to face social consequences than their female counterparts. Being male frequent drinker increased the odds of social consequence 3.80 times (95% CI:1.3-11.0) than that of female frequent drinker. CONCLUSIONS A behaviour change communication campaign needs initiation; male populace and frequent drinkers being the target.
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Affiliation(s)
- P Thapa
- Nepal Health Research Council, Kathmandu, Nepal
| | - S R Mishra
- Nepal Development Society, Bharatpur-10, Chitwan, Nepal
| | - B Bista
- Nepal Health Research Council, Kathmandu, Nepal
| | | | - N Adhikari
- Save the Children, Nepalgunj, Banke, Nepal
| | - L Soti
- Om Health Campus Pvt. Ltd, Chabahil, Kathmandu, Nepal
| | - S Puri
- Nepal Health Research Council, Kathmandu, Nepal
| | - K K Aryal
- Nepal Health Research Council, Kathmandu, Nepal
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Abstract
Salivary protein histatin 5 (Hst 5) is fungicidal toward Candida albicans, the causative agent of oropharyngeal candidiasis. However, its activity in saliva is compromised by salivary protease-mediated degradation and interaction with salivary salts. Hst 5 has also been shown to bind various metals in saliva-namely, Zn, Cu, and Ni. Surprisingly, interactions of Hst 5 with Fe have not been studied, although iron is one of the most abundant metals present in saliva. Using circular dichroism, we show that Hst 5 can bind up to 10 equivalents of iron as measured by loss of its alpha-helical secondary structure that is normally observed for it in trifluoroethylene. A significant decrease in the candidacidal ability of Hst 5 was observed upon iron binding, with increasing iron concentrations being inversely proportional to Hst 5 killing activity. Binding assays showed that the decrease in killing was likely a result of reduced binding (10-fold reduction) of Fe-Hst 5 to C. albicans cells. Protease stability analysis showed that Fe-Hst 5 was completely resistant to trypsin digestion. In contrast, zinc binding had limited effects on Hst 5 fungicidal activity or protease susceptibility. RNA sequencing results identified changes in iron uptake genes in Hst 5-treated C. albicans cells. Our findings thus suggest that consequences of Hst 5 binding iron not only affect candidacidal ability and proteolyic stability of Hst 5, but may also contribute to a novel killing mechanism involving interference with cellular iron metabolism.
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Affiliation(s)
- S Puri
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, New York, USA
| | - R Li
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, New York, USA
| | - D Ruszaj
- Department of Pharmaceutical Sciences, University at Buffalo, Buffalo, New York, USA
| | - S Tati
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, New York, USA
| | - M Edgerton
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, New York, USA
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Kumar S, Mehrotra R, Puri S. PR22 Lymphatic cancer spread assessment by podoplanin (D2-40) in breast cancer. Breast 2014. [DOI: 10.1016/s0960-9776(14)70032-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Affiliation(s)
- S Puri
- Department of Community Medicine, Government Medical College and Hospital, Sector 32, Chandigarh, India E-mail:
| | - Ss Sarpal
- Department of Community Medicine, Government Medical College and Hospital, Sector 32, Chandigarh, India E-mail:
| | - M Ashat
- Department of Community Medicine, Government Medical College and Hospital, Sector 32, Chandigarh, India E-mail:
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Puri S, Lai WKM, Rizzo JM, Buck MJ, Edgerton M. Iron-responsive chromatin remodelling and MAPK signalling enhance adhesion in Candida albicans. Mol Microbiol 2014; 93:291-305. [PMID: 24889932 DOI: 10.1111/mmi.12659] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/27/2014] [Indexed: 11/29/2022]
Abstract
Recent cumulative data show that various transcription factors are recruited to the chromatin in an iron-responsive manner to affect diverse cellular functions in the pathogenic fungus Candida albicans. Here we identified groups of iron-responsive genes in C. albicans by chromatin remodelling analysis at gene promoters, using micrococcal nuclease (MNase) digestion followed by deep sequencing. Chromatin in the promoter regions of iron uptake and utilization genes showed repressed and active configuration, respectively, under iron-replete conditions. GO Term enrichment analysis of genes with differentially remodelled chromatin, in respective promoter locales, suggested that many genes involved in adhesion are also iron-responsive. C. albicans was observed to be more self-adherent (twofold increase) and formed higher biofilm mass (77% increase) in the presence of iron. Furthermore, we identified various known and novel adhesion-related genes with iron-dependent active chromatin profiles that are indicative of potential upregulation under iron-replete conditions. Transcription factor Cph1 that is activated upon Cek1 phosphorylation also showed an active chromatin profile under iron-replete conditions and cells showed iron-responsive Cek1 MAPK phosphorylation in the presence of iron. Thus, iron affects diverse biological functions by modulating chromatin profiles of large gene sets and by signalling through Cek1 MAPK in C. albicans.
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Affiliation(s)
- Sumant Puri
- Department of Oral Biology, University at Buffalo, Buffalo, NY, 14214, USA
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Tjon-Kon-Fat RI, Bensdorp AJ, Maas J, Oosterhuis GJE, Hoek A, Hompes PGA, Broekmans FJ, Verhoeve HR, de Bruin JP, Repping S, Cohlen BJ, Groen H, Mol BWJ, van der Veen F, Wely M, Peeraer K, Debrock S, De Loecker P, Laenen A, Welkenhuyzen M, Spiessens C, De Neubourg D, D'Hooghe TM, Puri S, Mohan B, Herbemont C, Adda E, Hugues JN, Sermondade N, Dupont C, Cedrin-Durnerin I, Poncelet C, Levy R, Sifer C, Bellver J, Pellicer A, Garcia-Velasco JA, Ballesteros A, Remohi J, Meseguer M. Session 45: Clinical female infertility. Hum Reprod 2013. [DOI: 10.1093/humrep/det178] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Tati S, Jang WS, Li R, Kumar R, Puri S, Edgerton M. Histatin 5 resistance of Candida glabrata can be reversed by insertion of Candida albicans polyamine transporter-encoding genes DUR3 and DUR31. PLoS One 2013; 8:e61480. [PMID: 23613860 PMCID: PMC3632557 DOI: 10.1371/journal.pone.0061480] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Accepted: 03/11/2013] [Indexed: 12/29/2022] Open
Abstract
Candida albicans and Candida glabrata are predominant fungi associated with oral candidiasis. Histatin 5 (Hst 5) is a small cationic human salivary peptide with high fungicidal activity against C. albicans, however many strains of C. glabrata are resistant. Since Hst 5 requires fungal binding to cell wall components prior to intracellular translocation, reduced Hst 5 binding to C. glabrata may be the reason for its insensitivity. C. glabrata has higher surface levels of β-1,3-glucans as compared with C. albicans; however these differences did not account for reduced Hst 5 uptake and killing in C. glabrata. Similarly, the biofilm matrix of C. glabrata contained significantly higher levels of β-1,3-glucans compared with C. albicans, but it did not reduce the percentage of Hst 5 positive fungal cells in the biofilm. Hst 5 enters C. albicans cell through polyamine transporters Dur3p and Dur31p that are uncharacterized in C. glabrata. C. glabrata strains expressing CaDur3 and CaDur31 had two-fold higher killing and uptake of Hst 5. Thus, neither C. glabrata cell surface or biofilm matrix β-1,3-glucan levels affected Hst 5 toxicity; rather the crucial rate limiting step is reduced uptake that can be overcome by expression of C. albicans Dur proteins in C. glabrata.
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Affiliation(s)
- Swetha Tati
- Department of Oral Biology, University at Buffalo, Buffalo, New York, United States of America
| | - Woong Sik Jang
- Department of Oral Biology, University at Buffalo, Buffalo, New York, United States of America
| | - Rui Li
- Department of Oral Biology, University at Buffalo, Buffalo, New York, United States of America
| | - Rohitashw Kumar
- Department of Oral Biology, University at Buffalo, Buffalo, New York, United States of America
| | - Sumant Puri
- Department of Oral Biology, University at Buffalo, Buffalo, New York, United States of America
| | - Mira Edgerton
- Department of Oral Biology, University at Buffalo, Buffalo, New York, United States of America
- * E-mail:
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