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Article ; Online: Blood volume and structural imaging as an early indicator for photodynamic response

M. Atif / Atif Hanif / M.S. AlSalhi / S. Devanesan

Journal of King Saud University: Science, Vol 34, Iss 6, Pp 102143- (2022)

2022

Abstract: This study aims to discuss blood volume (BV), total hemoglobin concentration quantification, and ultrasound signal variations for their correlation with photodynamic therapy-induced modifications in the tumor and possibly with tumor response. The images ... ...

Abstract	This study aims to discuss blood volume (BV), total hemoglobin concentration quantification, and ultrasound signal variations for their correlation with photodynamic therapy-induced modifications in the tumor and possibly with tumor response. The images were interpreted in the frequency domain by applying a two-dimensional fast Fourier transform to the spatial domain images. The experimental results from animals treated with verteporfin showed a significant reduction in BV.
Keywords	Blood volume ; Total hemoglobin concentration ; Ultrasound ; Fast Fourier transform ; Verteporfin ; Science (General) ; Q1-390
Language	English
Publishing date	2022-08-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Novel findings in context of molecular diversity and abundance of bacteriophages in wastewater environments of Riyadh, Saudi Arabia.

Fahad Alanazi / Islam Nour / Atif Hanif / Ibrahim Al-Ashkar / Reem M Aljowaie / Saleh Eifan

PLoS ONE, Vol 17, Iss 8, p e

2022 Volume 0273343

Abstract: The diversity among bacteriophages depends on different factors like ecology, temperature conditions and genetic pool. Current study focused on isolation, identification and diversity of phages from 34 sewage water samples collected from two different ... ...

Abstract	The diversity among bacteriophages depends on different factors like ecology, temperature conditions and genetic pool. Current study focused on isolation, identification and diversity of phages from 34 sewage water samples collected from two different wastewater treatment plants (WWTPs), King Saud University wastewater treatment plants (KSU-WWTP) and Manfoha wastewater treatment plants (MN-WWTP) in Riyadh, Saudi Arabia. Samples were analyzed by PCR and Next Generation Sequencing (NGS). Siphoviridae, Podoviridae and Myoviridae families were detected by family-specific PCR and highest prevalence of Myoviridae 29.40% was found at MN-WWTP followed by 11.76% at KSU-WWTP. Siphoviridae was detected 11.76% at MN-WWTP and 5.88% at KSU-WWTP. Lowest prevalence for Podoviridae family (5.88%) was recorded at MN-WWTP. Significant influence of temporal variations on prevalence of Myoviridae and Siphoviridae was detected in both WWTP and MN-WWTP, respectively. Highest phage prevalence was obtained in August (75%), followed by September (50%). Highest phage prevalence was recorded at a temperature range of 29-33°C. Significant influence of temperature on the prevalence of Myoviridae phages was detected at MN-WWTP. Four bacteriophages with various abundance levels were identified by NGS. Cronobacter virus Esp2949-1 was found first time with highest abundance (4.41%) in wastewater of Riyadh. Bordetella virus BPP1 (4.14%), Dickeya virus Limestone (1.55%) and Ralstonia virus RSA1 (1.04%) were also detected from samples of MN-WWTP. Highest occurrence of Bordetella virus BPP1 (67%) and (33.33%) was recorded at KSU-WWTP and MN-WWTP, respectively. Highest Bordetella virus BPP1 occurrence was recorded in September (50%) followed by August (40%). The findings of study showed new insights of phage diversity from wastewater sources and further large-scale data studies are suggested for comprehensive understanding.
Keywords	Medicine ; R ; Science ; Q
Language	English
Publishing date	2022-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Oxygen saturation and blood volume analysis by photoacoustic imaging to identify pre and post-PDT vascular changes

M. Atif / Atif Hanif / M.S. AlSalhi / S. Devanesan / Haya Abdulaziz Altamimi

Saudi Journal of Biological Sciences, Vol 29, Iss 6, Pp 103304- (2022)

2022

Abstract: In this study, the blood volume and oxygen saturation of tumors were measured after photoacoustic imaging (PAI) under conditions of pre-photodynamic therapy (PDT), post-PDT, and 4 hrs, and 24 hrs post-PDT. PDTs with aminolevulinic acid (ALA) and low and ... ...

Abstract	In this study, the blood volume and oxygen saturation of tumors were measured after photoacoustic imaging (PAI) under conditions of pre-photodynamic therapy (PDT), post-PDT, and 4 hrs, and 24 hrs post-PDT. PDTs with aminolevulinic acid (ALA) and low and high doses of benzoporphyrin derivative (BPD) were conducted to observe oxygen saturation changes, and the rapid oxygen consumption in the blood detected due to the action of BPD at the vascular level resulted in the recovery of PDT completion. Likewise, blood volume changes followed by ALA-PDT and BPD-PDT at low and high doses depicted a fast expansion of the blood volume after treatment. The tumor subjected to a high dose of ALA-PDT showed a partial alteration of Hb-pO2 in the first 24 hrs, as did the tumors treated with two ALA- and BPD-mediated PDTs. The Hb-pO2 started reducing immediately post-PDT and was less than 30% after 4 hrs until 24 hrs post-PDT. Reduced vascular demand was possibly due to tumor necrosis, as shown by the permanent damage in the cancer cells' bioluminescence signal. The ALA-mediated PDT-subjected tumor showed a 50% drop in BV at 24 hrs post-PDT, which is suggestive of vascular pruning. The studied data of blood volume against BLI showed the blood volume and oxygenation variations validating the cells' metabolic activity, including cell death.
Keywords	Photoacoustic imaging ; Bioluminescence ; Blood volume ; Aminolevulinic acid ; Benzoporphyrin derivative ; Biology (General) ; QH301-705.5
Subject code	610
Language	English
Publishing date	2022-06-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Eco-friendly management of wheat stripe rust through application of Bacillus subtilis in combination with plant defense activators

Muhammad Arslan Khan / Muhammad Raheel / Sajid Aleem Khan / Allah Ditta Abid / Sohail Shahzad / Hamza Zaffar Siddiqui / Muhammad Atif / Atif Hanif

Journal of King Saud University: Science, Vol 35, Iss 4, Pp 102587- (2023)

2023

Abstract: Stripe rust (SR) caused by Puccinia striiformis Westend. f. sp. tritici Erikss (Pst) is one of the most important and destructive disease of wheat worldwide. In Pakistan, stipe rust appeared as epidemic and is causing huge losses to wheat production. ... ...

Abstract	Stripe rust (SR) caused by Puccinia striiformis Westend. f. sp. tritici Erikss (Pst) is one of the most important and destructive disease of wheat worldwide. In Pakistan, stipe rust appeared as epidemic and is causing huge losses to wheat production. However, wheat breeding programs are not sufficiently advanced to cope with the recently emerged Puccinia striiformis strains. Under this scenario, current research was carried out for safe, effective and sustainable management of stripe rust of wheat. Seven wheat varieties include Sehar-06, Galaxy-13, Abdul Sattar-02, Faisalabad-08, Johar-16, TD-1 and Ujala-16 were planted at research farm of Muhammad Nawaz Shareef University of Agriculture, Multan, Pakistan during November 2019–20 and 2020–21 to determine their response toward Puccinia striiformis. The fungicide Tilt®, propiconazole, (T2) at the rate of 3 mL per 1500 mL water was used while the Bacillus subtilis (T1) was added at rate of 0.25 mL/1500 mL water with 15 g of dextrose, 0.25 g of chitosan and 0.25 g of salicylic acid in 1500 mL water to make a fine suspension. Our results showed that T1 reduced the disease effectively up to (8.18%) followed by T2 (10.7%) as compared to T0 (23.8%). The correlation between minimum air temperature, relative humidity and disease severity was highly significant while with maximum air temperature it was negatively non-significant. Also, wind speed, solar radiation and rainfall showed non-significant correlation with disease severity. After treatment, application of T1 and T2, minimum air temperature expressed a significant correlation with disease severity on varieties Sehar-2006, Galaxy-13 and Abdul Sattar-02 while non-significant correlation with disease severity on varieties Faisalabad-08, Johar-16, TD-1 and Ujala-16. Similarly, maximum air temperature, relative humidity, wind speed and solar radiation showed non-significant correlation with disease severity while rain fall was negatively non-significant. The current study showed that Bacillus subtilis is an ecofriendly ...
Keywords	Bacteria ; Varietal resistance ; Biological Control ; Rust ; Wheat ; Science (General) ; Q1-390
Subject code	630
Language	English
Publishing date	2023-05-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Human Adenovirus Molecular Characterization in Various Water Environments and Seasonal Impacts in Riyadh, Saudi Arabia

Islam Nour / Atif Hanif / Adel M. Zakri / Ibrahim Al-Ashkar / Abdulkarim Alhetheel / Saleh Eifan

International Journal of Environmental Research and Public Health, Vol 18, Iss 4773, p

2021 Volume 4773

Abstract: The regular monitoring of water environments is essential for preventing waterborne virus-mediated contamination and mitigating health concerns. We aimed to detect human adenovirus (HAdV) in the Wadi Hanifah (WH) and Wadi Namar (WN) lakes, King Saud ... ...

Abstract	The regular monitoring of water environments is essential for preventing waterborne virus-mediated contamination and mitigating health concerns. We aimed to detect human adenovirus (HAdV) in the Wadi Hanifah (WH) and Wadi Namar (WN) lakes, King Saud University wastewater treatment plant (KSU-WWTP), Manfouha-WWTP, irrigation water (IW), and AnNazim landfill (ANLF) in Riyadh, Saudi Arabia. HAdV hexon sequences were analyzed against 71 HAdV prototypes and investigated for seasonal influence. ANLF had the highest HAdV prevalence (83.3%). Remarkably, the F species of HAdV, especially serotype 41, predominated. Daily temperature ranges (22–45 °C and 10–33 °C) influenced the significance of the differences between the locations. The most significant relationship of ANLF and IW to WH and KSU-WWTP was found at the high-temperature range ( p = 0.001). Meanwhile, WN was most correlated to ANLF at the low-temperature range ( p < 0.0001). Seasonal influences on HAdV prevalence were insignificant despite HAdV’s high prevalence in autumn and winter months, favoring low temperatures (high: 22–25 °C, low: 14–17 °C) at five out of six locations. Our study provides insightful information on HAdV prevalence and the circulating strains that can address the knowledge gap in the environmental impacts of viruses and help control viral diseases in public health management.
Keywords	human adenovirus ; waterborne ; type 41 ; prevalence ; seasonality ; Medicine ; R
Language	English
Publishing date	2021-04-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Novel insights of waterborne human rotavirus A in Riyadh (Saudi Arabia) involving G2 predominance and emergence of a thermotolerant sequence

Islam Nour / Atif Hanif / Ibrahim O. Alanazi / Ibrahim Al-Ashkar / Abdulkarim Alhetheel / Saleh Eifan

Scientific Reports, Vol 11, Iss 1, Pp 1-

2021 Volume 12

Abstract: Abstract The routine evaluation of water environments is necessary to manage enteric virus-mediated fecal contamination and the possible emergence of novel variants. Here, we detected human rotavirus A (HRVA) circulating in two wastewater treatment ... ...

Abstract	Abstract The routine evaluation of water environments is necessary to manage enteric virus-mediated fecal contamination and the possible emergence of novel variants. Here, we detected human rotavirus A (HRVA) circulating in two wastewater treatment plants, two lakes, irrigation water and a wastewater landfill located in Riyadh. VP7-derived surface protein sequences were assessed by phylogenetic analyses and inspection of thermotolerance-mediated secondary structure and seasonal variation. HRVA was most prevalent at An-Nazim wastewater landfill (AN-WWLF; 63.89%). Phylogenetic analyzes revealed the predominance of HRVA G2 lineage for the first time in Saudi Arabia. Moreover, a single HRVA sequence (2B64I-ANLF3/2018) was recovered at 45 °C from AN-WWLF; secondary structure prediction indicated that this sequence was thermotolerant with a high hydrophobicity, an absence of Ramachandran outliers, and a higher content of proline patches on the protein surface. Varied relationships were significantly observed between sampling areas influenced by temperature ranges (p < 0.05). HRVA prevalence was influenced by seasonal variations, favoring moderate temperatures in late autumn and early winter in all locations. However, a significant temperature impact was detected in Wadi-Hanifah Lake (p = 0.01). Our study extends the knowledge of currently circulating HRVA genotypes, and indicates the probable emergence of thermotolerant strains and seasonally mediated HRVA prevalence.
Keywords	Medicine ; R ; Science ; Q
Language	English
Publishing date	2021-06-01T00:00:00Z
Publisher	Nature Portfolio
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Distribution and Molecular Identification of Culex pipiens and Culex tritaeniorhynchus as Potential Vectors of Rift Valley Fever Virus in Jazan, Saudi Arabia

Saleh Eifan / Atif Hanif / Islam Nour / Sultan Alqahtani / Zaki M. Eisa / Ommer Dafalla / Alain Kohl

Pathogens, Vol 10, Iss 1334, p

2021 Volume 1334

Abstract: Entomologic investigations were conducted in the Al-Darb, Al-Reath, Al-Aridah, Abuareesh, Al-Ahad, Samttah, Sabyah, Damad and Beash areas by CO 2 -baited CDC miniature light traps in the Jazan region. Vectors were identified morphologically, as well as ... ...

Abstract	Entomologic investigations were conducted in the Al-Darb, Al-Reath, Al-Aridah, Abuareesh, Al-Ahad, Samttah, Sabyah, Damad and Beash areas by CO 2 -baited CDC miniature light traps in the Jazan region. Vectors were identified morphologically, as well as COI gene segment amplification and sequencing. The relative abundance (RA%) and pattern of occurrence (C%) were recorded. The presence of the Rift Valley fever virus (RVFV) in pooled mosquito samples was investigated by reverse transcriptase-polymerase chain reaction (RT-PCR). Culex pipiens ( C. pipiens ) and Culex tritaeniorhynchus ( C. tritaeniorhynchus ) were found with RA% values of 96% and 4%, respectively, in the region. Significant variations in vector population densities were observed in different districts. The C. pipiens was found highly abundant in all districts and RA% value (100%) was recorded in the Al-Darb, Al-Reath, Al-Aridah, Samttah and Damad areas, whereas RA% values (93.75%, 93.33%, 92.30% and 91.66%) were noted in Al-Ahad, Sabyah, Abuareesh and Beash districts, respectively. RA% values for C. tritaeniorhynchus were recorded as 8.33%, 7.70%, 6.66% and 6.25% in Beash, Abuareesh, Sabyah and Al-Ahad areas, respectively. The pattern of occurrence for C. pipiens and C. tritaeniorhynchus was recorded as 100% and 44.4% in the region. Phylogenetic analysis of C. pipiens and C. tritaeniorhynchus exhibited a close relationship with mosquitoes from Kenya and Turkey, respectively. All mosquito samples tested by RT-PCR were found negative for RVFV. In summary, the current study assessed the composition, abundance, distribution of different mosquito vectors and presence of RVFV in different areas of the Jazan region. Our data will help risk assessments of RVFV future re-emergence in the region.
Keywords	C. pipiens ; C. tritaeniorhynchus ; Rift Valley fever virus ; abundance ; Jazan ; Medicine ; R
Subject code	910
Language	English
Publishing date	2021-10-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Respiratory Tract Viral Infections and Coinfections Identified by Anyplex™ II RV16 Detection Kit in Pediatric Patients at a Riyadh Tertiary Care Hospital

Saleh A. Eifan / Atif Hanif / Sameera Mohammed AlJohani / Muhammad Atif

BioMed Research International, Vol

2017 Volume 2017

Abstract: Respiratory infections are caused by an array of viruses, and limited information is available about viral coexistence, comparative symptoms, and the burden of illness. This retrospective cohort study aimed to determine the etiological agents responsible ...

Abstract	Respiratory infections are caused by an array of viruses, and limited information is available about viral coexistence, comparative symptoms, and the burden of illness. This retrospective cohort study aimed to determine the etiological agents responsible for respiratory tract infections by Anyplex II RV16 detection kit (RV16, Seegene), involving 2266 pediatric patients with respiratory infections admitted to the Department of Pediatrics at King Abdul-Aziz Medical City, Ministry of National Guard, Riyadh, from July 2014 to June 2015. The most frequent respiratory infections were recorded in the 1 to 5 year age group (44.7%). Rhinovirus (32.5%), Adenovirus (16.9%), and Respiratory syncytial virus (RSV) B (10.4%) were most common. In single viral infections, Rhinovirus (41.2%), Metapneumovirus (15.3%), and Bocavirus (13.7%) were most frequent. In multiple viral infections, Rhinovirus (36.7%), Adenovirus (35.2%), Bocavirus (11.2), RSV B (7.8%), and RSV A (6.7%) were most frequent. No significant difference was observed in clinical presentations; however, rhinorrhea and hypodynamia were significantly associated with viral respiratory infections. Most respiratory viral pathogens peaked during December, January, March, and April. Rhinovirus, Adenovirus, and Bocavirus circulations were detected throughout the year. Winter peaks were recorded for Rhinovirus, RSV B, Adenovirus, and RSV A, whereas the Metapneumovirus, and the Bocavirus peaked in March and April. These findings enhance understanding of viral etiology and distribution to improve respiratory infection management and treatment.
Keywords	Medicine ; R
Subject code	572 ; 610
Language	English
Publishing date	2017-01-01T00:00:00Z
Publisher	Hindawi Limited
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Structural, electrical and optical properties of Zn1−xCuxO (x = 0.00–0.09) nanoparticles

Tariq Munir / Arslan Mahmood / Naveed Ahmad / M. Atif / K.S. Alimgeer / Amanullah Fatehmulla / Atif Hanif / Nafeesah Yaqub / W.A. Farooq / Shafiq Ahmad / Yu-ming Chu / Hijaz Ahmad

Journal of King Saud University: Science, Vol 33, Iss 2, Pp 101330- (2021)

2021

Abstract: Pure and copper doped zinc oxide nanoparticles (Zn1−xCuxO) of different concentrations (x = 0.0, 0.03, 0.06 and 0.09 wt%) were synthesized by using co precipitation method. During the next phase, effect of Cu concentration on structural, electrical and ... ...

Abstract	Pure and copper doped zinc oxide nanoparticles (Zn1−xCuxO) of different concentrations (x = 0.0, 0.03, 0.06 and 0.09 wt%) were synthesized by using co precipitation method. During the next phase, effect of Cu concentration on structural, electrical and optical properties of ZnO-NPs were investigated with the multiple techniques like XRD, UV–visible spectroscopy, FTIR, and two probe methods. The XRD analysis confirmed hexagonal wurtzite crystal structure having crystallite sizes ranging between 18.3 and 24.2 nm. Rotational and vibration mode of different functional groups (OH, CH, C = O and ZnO) were calculated using FTIR spectra. Moreover, the UV visible spectroscopy identified a band gap (3.10–2.30 eV) of pure and Cu doped ZnO-NPs. Finally, electrical properties like conductivity was increased and whereas, the resistivity decreased with increasing Cu dopant concentrations. Overall, addition of Cu as doping agent improved the structural, optical and electrical properties ZnO-NPs and could enable multiple further potential applications like solar cell, energy storage and other optoelectronic devices.
Keywords	Zinc oxide NPs ; Co-precipitation ; Hexagonal wurtzite crystal structure ; Conductivity ; Resistivity ; Solar cell ; Science (General) ; Q1-390
Subject code	620
Language	English
Publishing date	2021-03-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Mathematical modeling and experimental analysis of the efficacy of photodynamic therapy in conjunction with photo thermal therapy and PEG-coated Au-doped TiO2 nanostructures to target MCF-7 cancerous cells

Seemab Iqbal / M. Fakhar-e-Alam / K.S. Alimgeer / M. Atif / Atif Hanif / Nafeesah Yaqub / W.A. Farooq / Shafiq Ahmad / Yu-Ming Chu / Muhammad Suleman Rana / Amanullah Fatehmulla / Hijaz Ahmad

Saudi Journal of Biological Sciences, Vol 28, Iss 2, Pp 1226-

2021 Volume 1232

Abstract: Some nanoscale morphologies of titanium oxide nanostructures blend with gold nanoparticles and act as satellites and targeted weapon methodologies in biomedical applications. Simultaneously, titanium oxide can play an important role when combined with ... ...

Abstract	Some nanoscale morphologies of titanium oxide nanostructures blend with gold nanoparticles and act as satellites and targeted weapon methodologies in biomedical applications. Simultaneously, titanium oxide can play an important role when combined with gold after blending with polyethylene glycol (PEG). Our experimental approach is novel with respect to the plasmonic role of metal nanoparticles as an efficient PDT drug. The current experimental strategy floats the comprehensive and facile way of experimental strategy on the critical influence that titanium with gold nanoparticles used as novel photosensitizing agents after significant biodistribution of proposed nanostructures toward targeted site. In addition, different morphologies of PEG-coated Au-doped titanium nanostructures were shown to provide various therapeutic effects due to a wide range of electromagnetic field development. This confirms a significantly amplified population of hot electron generation adjacent to the interface between Au and TiO2 nanostructures, leading to maximum cancerous cell injury in the MCF-7 cell line. The experimental results were confirmed by applying a least squares fit math model which verified our results with 99% goodness of fit. These results can pave the way for comprehensive rational designs for satisfactory response of performance phototherapeutic model mechanisms along with new horizons of photothermal therapy (HET) and photodynamic therapy (HET) operating under visible and near-infrared (NIR) light.
Keywords	PEG-coated Au-doped Titanium oxide (TiO2) nanostructures ; Photodynamic therapy (PDT) ; Photothermal therapy/(HET) ; MCF-7 cancerous cells ; Biology (General) ; QH301-705.5
Subject code	620
Language	English
Publishing date	2021-02-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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