Structural, material and antibacterial properties of quercetin incorporated soy protein isolate films and its binding behavior through molecular docking.

This study aimed to investigate the three different methods for the fabrication of quercetin (1%-3% w/w of protein) incorporated soy protein isolate (SPI) films and their effect on material properties. The quercetin incorporated SPI films prepared by these methods were characterized by Fourier transform infrared (FTIR) spectroscopy, UV-Vis spectrophotometer, tensile properties, and water uptake and leaching properties. The cross-linking pattern was revealed by the FTIR spectrum that showed formation of an ester group because of interaction between the quercetin hydroxyl group and the carboxyl side chain of SPI amino acids. The tensile strength of SPI films were enhanced with the addition of quercetin as it increased to a maximum of 6.17 MPa while neat SPI film had tensile strength 4.13 MPa. The prepared films exhibit significant antibacterial activity against Listeria monocytogenes and Escherichia coli. The In-silico docking analysis demonstrates that covalent and non-covalent forces play crucial roles in binding interaction. It shows the formation of four hydrogen bonds, two salt bridges along with one pi-alkyl interaction. The simulation studies reflect the crucial amino acid residues involved in SPI-quercetin binding. The effect of quercetin binding with SPI on its stability and compactness is revealed by Root mean square deviation (RMSD) and radius of gyration studies.

Correction: A biomass-derived dual crosslinked DNA-nanoparticle hydrogel for visible light-induced photodynamic bacterial inactivation.

Correction for 'A biomass-derived dual crosslinked DNA-nanoparticle hydrogel for visible light-induced photodynamic bacterial inactivation' by Gourab Das et al., Soft Matter, 2023, https://doi.org/10.1039/D3SM01400B.

A biomass-derived dual crosslinked DNA-nanoparticle hydrogel for visible light-induced photodynamic bacterial inactivation.

Sustainability in developing novel nanomaterials (NPs) from biomass sources is a challenging proposition mainly due to the difficulty of infusing or retaining desired chemical functionalities in the biomass substrate. In this study, we demonstrate the synthesis of DNA-nanoparticles (DNA-NP) from onion genomic DNA as a plant biomass source through controlled hydrothermal pyrolysis to retain functional groups in the NPs for predictable downstream chemical transformations. A dual crosslinking scheme was introduced that involves the DNA-NP to form a hydrogel. Chemical crosslinking was achieved through the formation of a Schiff base between the -CHO groups of glutaraldehyde and the amine functionality present on the DNA-NP surface as well as in the nucleobases of the dangling DNA strands of DNA-NP. Simultaneous physical entanglement was attained through hybridization-mediated self-assembly of the dangling DNA strands of the DNA-NP with untransformed onion genomic DNA. As a corollary of the dual crosslinking, the resulting hydrogel not only displayed remarkable mechanical strength but also showed self-healing properties. The ability of the DNA-NP to generate reactive oxygen species (ROS) with visible light irradiation is translated to the hydrogel, making the system potent for biofilm destruction. The high loading efficiency of the model drug ampicillin sodium (Amp) in the hydrogel was achieved which was released in four days. This hints towards the application of the hydrogel through combination antibiotic-antibacterial photodynamic treatment (APDT) as demonstrated here with both Gram-positive and Gram-negative bacteria.

Metagenomics Approaches in Discovery and Development of New Bioactive Compounds from Marine Actinomycetes.

Marine actinomycetes are prolific sources of marine drug discovery system contributing for several bioactive compounds of biomedical prominence. Metagenomics, a culture-independent technique through its sequence- and function-based screening has led to the discovery and synthesis of numerous biologically significant compounds like polyketide synthase, Non-ribosomal peptide synthetase, antibiotics, and biocatalyst. While metagenomics offers different advantages over conventional sequencing techniques, they also have certain limitations including bias classification, non-availability of quality DNA samples, heterologous expression, and host selection. The assimilation of advanced amplification and screening methods such as φ29 DNA polymerase, Next-Generation Sequencing, Cosmids, and recent bioinformatics tools like automated genome mining, anti-SMASH have shown promising results to overcome these constrains. Consequently, functional genomics and bioinformatics along with synthetic biology will be crucial for the success of the metagenomic approach and indeed for exploring new possibilities among the microbial consortia for the future drug discovery process.

A review of chromite mining in Sukinda Valley of India: impact and potential remediation measures.

Sukinda Valley, one of the highly polluted areas of the world is generating tons of mining waste and causing serious health and environmental issues in its surroundings. Several reports are available reporting the severity of hexavalent chromium, yet little efforts have been made to address the pollution and its remediation due to a lack of proper remedial measures. The review highlights the pros and cons of various physical, chemical and biological techniques used worldwide for the treatment of chromium waste and also suggests better and reliable bioremediation measures. Microbes such as Acidophilium and Acidithiobacillus caldus (Bioleaching), Pseudomonas, Micrococcus and Bacillus (Bioreduction), Aereobacterium and Saccharomyces (Biosorption), are widely used for bioremediation of hexavalent chromium owing to their unique metabolic activities, ionic movement through an extracellular membrane, and other cellular adsorptions and reduction properties. The use of native and hybrid combinations of microbes supported by organic supplements is projected as a fast and efficient technique that not only reduces chromium quantity but also maintains the integrity of the microbial sources. Innovation and emphasis on nano-based products like nanocomposite, nano adsorbent, nanoscale zerovalent iron (nZVI) particles and multifunctional plant-growth-promoting bacteria (PGPB) will serve as the next generation environmental remediation technologies in the near future.

Modification Patterns of Urinary Albumin Correlates With Serum Albumin and Outcome in Severe Alcoholic Hepatitis.

BACKGROUND AND AIMS: Albumin modifications and deranged functions are well documented in serum of severe alcoholic hepatitis (SAH). We investigated whether urinary albumin (u-Alb) can serve as surrogate marker of circulatory albumin phenotype, functionality, and could predict outcome in SAH patients. PATIENTS AND METHODS: Baseline serum and urine samples from 100 SAH, 20 alcoholic cirrhosis, and 20 healthy controls were subjected to u-Alb, ischemia modified albumin (IMA), IMA to albumin ratio (IMAr), advanced oxidation protein products, advanced glycation end-products, albumin-binding capacity determination. In addition, SAH urinary samples were also analyzed at day 4 and day 7 to predict nonresponse to corticosteroid therapy. RESULTS: Urine and serum levels of IMA, advanced oxidation protein products and advanced glycation end-products were higher (P<0.05) in SAH versus alcoholic cirrhosis and healthy controls. IMAr was low in urine but high in serum of SAH (P<0.05). Albumin-binding capacity was lower (P<0.05) in both urinary and serum albumin of SAH. Urinary and serum albumin parameters showed direct correlation, whereas IMAr showed inverse correlation (cc>0.2, P<0.05). Baseline u-Alb level was significantly higher in SAH, and was correlated directly with corticosteroid treatment outcome and 12-month mortality in SAH. Baseline u-Alb showed an area under the receivers operating curve analysis of 0.7 and a hazard ratio of 1.23 for prediction of 12-month mortality in SAH. Baseline u-Alb level >9.0 mg/dL was associated with reduced 12-month survival in SAH (log rank <0.01). CONCLUSIONS: u-Alb modifications are reflective of serum albumin modifications. Further baseline u-Alb levels could be exploited to predict steroid response and mortality in SAH patients.

Detection of Coagulopathy in Chronic Renal Disease using Thromboelastography and its comparison with Conventional Tests.

PURPOSE OF THE STUDY: Thromboelastography provides a holistic picture of blood coagulation including fibrin formation, cross, linking and fibrinolysis. Coagulaopathy in end stage renal disease (ESRD) is multifactorial. The present evaluated the thromboelastographic profile of ESRD patients and compared it to conventional tests of coagulation. STUDY DESIGN: In this observational case control study, fifty ESRD patients and 50 controls were recruited. Venous samples were withdrawn and platelet count, International Normalization Ratio and fibrinogen levels were measure. Simultaneously a thromboelastography (TEG) was performed. All samples were drawn prior to initiation of dialysis. RESULTS: The fibrinogen concentration was higher in the ESRD group compared to control (455.51±83.39 vs. 233.84±71.71 mg/dl, P<0.05). The maximum amplitude in ESRD group was 76.94 ± 15.11 mm, which was significantly higher than control group 65.10±10.31 mm (P<0.05).Out of 50 ESRD patients,39 had maximum amplitude (MA) >73mm, 3 had MA <55 mm while 8 patients had normal MA. Further, it was seen that in four out if the five patients whose INR was greater than 1.5. TEG was hypercoaguable. Also, three patients whose platelet count was less than x105/dl had normal thromboelastographs. Two patients with normal platelet count, fibrinogen and INR had hypercoaguable thromboelastographs. Thromboelastography could detect fibrinolysis in 5 patients of end stage renal disease. CONCLUSION: The present study demonstrated that INR, platelet count and fibrinogen levels do not reflect the actual coagulation status in patients of ESRD. Thromboelastography is a better tool to detect coagulopathy in this group of patients.

Generic sofosbuvir-based direct-acting antivirals in hepatitis C virus-infected patients with chronic kidney disease.

BACKGROUND & AIMS: There is scant data on use of sofosbuvir containing directly acting antiviral (DAA) regimens in chronic kidney disease (CKD) patients. Recently generic versions of DAAs have become available in low-income countries including India. The aim of this study was to study the efficacy and safety of generic sofosbuvir in combination with generic ribavirin, ledipasvir or daclatasvir in HCV-infected patients with CKD including patients with advanced CKD (CKD stage 4 or 5 with an estimated glomerular filtration rate (GFR) <30 mL/min or those on dialysis). METHODS: Seventy-one CKD patients (76% male, 84.5% on maintenance haemodialysis, 23.9% cirrhosis) with HCV infection were included in the study. Full-dose sofosbuvir was used in combination with ribavirin (n = 26, for 24 weeks, 69.2% genotype 1, 30.8% genotype 3), ledipasvir (n = 26, for 12 weeks, all genotype 1) and daclatasvir (n = 19, for 12 weeks, all genotype 3). RESULTS: Sustained virological response (SVR) (HCV RNA <12 IU/mL) at 12 weeks after stopping treatment was seen in 100% of the patients in all the 3 groups. At 24-week follow-up after end of therapy, 1 patient in sofosbuvir plus ledipasvir group relapsed. At 48-week follow-up after end of therapy, 1 more patient in sofosbuvir plus ribavirin group relapsed. CONCLUSION: Full-dose sofosbuvir-based DAA therapy using generics is highly effective for individuals with HCV infection and CKD including advanced CKD (CKD stage 4 or 5 with an e-GFR <30 mL/min or those on dialysis).

Combined Fluoroscopy and Ultrasound-Guided Transjugular Kidney Biopsy in Cirrhotic Patients.

PURPOSE: To evaluate the safety and diagnostic yield of combined fluoroscopy and ultrasound-guided transjugular kidney biopsy (TJKB) in cirrhotic patients with suspected renal parenchymal disease. MATERIALS AND METHODS: A retrospective review was made of 27 patients (21 men; overall mean age 44.7 y) who underwent TJKB from June 2013 to June 2016; 21 patients had coagulopathy and/or thrombocytopenia, 4 underwent simultaneous TJKB with transjugular liver biopsy, and 1 patient each had severe obesity and gross ascites. All procedures were performed with the use of fluoroscopy and simultaneous transabdominal ultrasound guidance. The data were analyzed for number of passes taken, number of glomeruli in the tissue cores, adequacy of tissue core for histopathologic diagnosis, and incidence and severity of complications. RESULTS: The average number of passes per case was 3.6 (range 2-6). The total length of tissue cores ranged from 0.4 cm to 2.5 cm. The mean numbers of glomeruli per procedure on light microscopy were 6.7 (range 0-17). Diagnostic biopsy specimens were obtained in 23 out of 27 patients (85%). Eleven patients had minor complications. One patient had major complication in the form of hemoglobin drop of 2.1 mg/dL which required embolization and blood transfusion. CONCLUSIONS: Combined use of fluoroscopy and ultrasound guidance for TJKB yielded adequate tissue samples with fewer passes and a low rate of complications in high-risk patients with cirrhosis.

Development of predisposition, injury, response, organ failure model for predicting acute kidney injury in acute on chronic liver failure.

BACKGROUND AND AIM: There is limited data on predictors of acute kidney injury in acute on chronic liver failure. We developed a PIRO model (Predisposition, Injury, Response, Organ failure) for predicting acute kidney injury in a multicentric cohort of acute on chronic liver failure patients. PATIENTS AND METHODS: Data of 2360 patients from APASL-ACLF Research Consortium (AARC) was analysed. Multivariate logistic regression model (PIRO score) was developed from a derivation cohort (n=1363) which was validated in another prospective multicentric cohort of acute on chronic liver failure patients (n=997). RESULTS: Factors significant for P component were serum creatinine[(≥2 mg/dL)OR 4.52, 95% CI (3.67-5.30)], bilirubin [(<12 mg/dL,OR 1) vs (12-30 mg/dL,OR 1.45, 95% 1.1-2.63) vs (≥30 mg/dL,OR 2.6, 95% CI 1.3-5.2)], serum potassium [(<3 mmol/LOR-1) vs (3-4.9 mmol/L,OR 2.7, 95% CI 1.05-1.97) vs (≥5 mmol/L,OR 4.34, 95% CI 1.67-11.3)] and blood urea (OR 3.73, 95% CI 2.5-5.5); for I component nephrotoxic medications (OR-9.86, 95% CI 3.2-30.8); for R component,Systemic Inflammatory Response Syndrome,(OR-2.14, 95% CI 1.4-3.3); for O component, Circulatory failure (OR-3.5, 95% CI 2.2-5.5). The PIRO score predicted acute kidney injury with C-index of 0.95 and 0.96 in the derivation and validation cohort. The increasing PIRO score was also associated with mortality (P<.001) in both the derivation and validation cohorts. CONCLUSIONS: The PIRO model identifies and stratifies acute on chronic liver failure patients at risk of developing acute kidney injury. It reliably predicts mortality in these patients, underscoring the prognostic significance of acute kidney injury in patients with acute on chronic liver failure.

Surgical illustration of en-bloc (dual) kidney transplant from a 16-month old brain-dead donor to an adult recipient.

Transplantable organs from pediatric donors have been contributing significantly to donor pool worldwide. Pediatric donors are excellent resources that should be procured whenever available, and with the recent increase in deceased donations in India, more pediatric donors will be available for organ harvesting. We share a rare instance of multi-organ harvesting from a 16-month old brain dead donor and implanting both kidneys en-bloc in an adult male, while liver went to a 4-year old child. The report provides the surgical illustration of salient steps of transplanting both kidneys from pediatric donor into an adult, in an en-bloc manner.

Cystine-cored diphenylalanine appended peptide-based self-assembled fluorescent nanostructures direct redox-responsive drug delivery.

Fabrication of stimuli-responsive superstructure capable of delivering chemotherapeutics directly to the cancer cell by sparing healthy cells is crucial. Herein, we developed redox-responsive hollow spherical assemblies through self-assembly of disulfide-linked cysteine-diphenylalanine (SN). These fluorescent hollow spheres display intrinsic green fluorescence, are proteolytically stable and biocompatible, and allow for real-time monitoring of their intracellular entry. The disulfide bond facilitates selective degradation in the presence of high glutathione (GSH) concentrations, prevalent in cancer cells. We achieved efficient encapsulation (68.72%) of the anticancer drug doxorubicin (Dox) and demonstrated GSH-dependent, redox-responsive drug release within cancerous cells. SN-Dox exhibited a 20-fold lower effective concentration (2.5 µM) for compromising breast cancer cell viability compared to non-malignant cells (50 µM). The ability of SN-Dox to initiate DNA damage signaling and trigger apoptosis was comparable to that of the unencapsulated drug. Our findings highlight the potential of SN for creating site-specific drug delivery vehicles for sustained therapeutic release.

Carbon dot-based superhydrophobic modification of a covalent organic framework for oil-in-water emulsion separation.

A super hydrophobic composite is developed for the first time through the non-covalent self-assembly of a hydrophilic covalent organic framework (COF) and amphoteric CDs to achieve highly selective separation of dispersed micro droplets of oil from an oil/water mixture.

Chemically induced crosslinked enhanced emission of carbon polymer dots discerning healthy and cancer cells through pH-dependent tunable photoluminescence.

Chemically induced crosslinked enhanced emission (CEE) of urea and citric acid-derived carbon polymer dot (CPD) nanoparticles is established here with a rare zero linker approach, i.e. without the use of any separate crosslinkers. Such chemical CEE like any chemical reaction was achieved through amide bond formation using carbodiimide chemistry, pointing towards the feasibility of developing a general methodology for their formation through engineering the nanoparticle surface functionality. Exhaustive characterization was done to pinpoint the structure, morphology, and photophysics of the CPDs and concurrently eliminate the possibility of the involvement and interference by molecular fluorophores for the unique optical tuning of the CPDs. The structure-photophysics relation was further restated through theoretical studies involving density functional theory (DFT) that correlated significantly well with the experimental findings. Most interestingly, the CPDs revealed pH responsiveness due to the formation or hydrolysis of amide bonds with acid or base, respectively, which was manifested through a spectacular change in fluorescence emission visible to the naked eye through UV illumination. This distinct pH-dependent photoluminescence properties of CPDs opens up an enormous opportunity for interesting applications, including discriminating normal and cancerous cells, which we demonstrate herein as a proof of concept through in vitro imaging.

Simultaneous Sustained Drug Delivery, Tracking, and On-Demand Photoactivation of DNA-Hydrogel Formulated from a Biomass-Derived DNA Nanoparticle.

Conversion of biomass into nanoparticles for meaningful biomedical applications is a formidable proposition with excellent prospects but fewer patrons. A lack of general methodology for upscaled production and limited versatility of those nanoparticles are the main drawbacks. Herein, we report the creation of a DNA nanoparticle (DNA Dots) from onion genomic DNA (gDNA), a plant biomass source, through controlled hydrothermal pyrolysis in water without any chemicals. The DNA Dots are further formulated into a stimuli-responsive hydrogel through hybridization-mediated self-assembly with untransformed precursor gDNA. The versatility of the DNA Dots is recognized through its crosslinking ability with gDNA through its dangling DNA strands on the surface resulting from incomplete carbonization during annealing without the need for any external organic, inorganic, or polymeric crosslinkers. The gDNA-DNA Dots hybrid hydrogel is shown to be an excellent drug delivery vehicle for sustained release trackable through the inherent fluorescence of the DNA Dots. Interestingly, the DNA Dots are photoexcited with normal visible light to generate on-demand reactive oxygen species, making them exciting candidates for combination therapeutics. Most importantly, the ease with which the hydrogel is internalized in fibroblast cells with minimal cytotoxicity should encourage the nanotization of biomass as a tool for interesting sustainable biomedical applications.

Biomass derived self-assembled DNA-dot hydrogels for enhanced bacterial annihilation.

Nanotization of biomass for interesting biomedical applications is still in the nascent stage with no visible market available products. While products derived from biomass DNA and protein have unquestionable biocompatibility, induction of desired properties needs careful manipulation of the biomolecules. Herein, for the first time, we report the transformation of onion derived biomass DNA into DNA-dots through its partial hydrothermal pyrolysis to induce improved mechanical and photophysical properties. The DNA-dots were further used as crosslinkers to create a hydrogel through hybridization-mediated self-assembly with untransformed genomic DNA. The DNA dot-DNA hydrogel sustainably delivers the ciprofloxacin antibiotic as well as produces on-demand reactive oxygen species (ROS) with visible light irradiation. This prompted us to explore the hydrogel as a topical formulation for combination antibiotic Antibacterial-Photodynamic Therapy (APDT) applications. Remarkable annihilation of E. coli and S. aureus, and most importantly two drug-resistant strains of E. coli, shows the success of our sustainable approach.

Covalent Conjugation of Carbon Dots with Plasmid and DNA Condensation Thereafter: Realistic Insights into the Condensate Morphology, Energetics, and Photophysics.

The use of carbon quantum dots (CDs) as trackable nanocarriers for plasmid and gene as hybrid DNA condensates has gained momentum, as evident from the significant recent research efforts. However, the in-depth morphology of the condensates, the energetics of the condensation process, and the photophysical aspects of the CD are not well understood and often disregarded. Herein, for the first time, we covalently attached linearized pUC19 with citric acid and cysteamine-derived CD through the reaction of the surface amine groups of CDs with the 5'-phospho-methyl imidazolide derivative of the plasmid to obtain a 1:1 CD-pUC19 covalent conjugate. The CD-pUC19 conjugates were further transformed into DNA condensates with spermine that displayed a toroidal morphology with a diameter of ∼200 nm involving ∼2-5 CD-pUC19 conjugates in a single condensate. While the interaction of pristine CD to spermine was exothermic, the binding of the CD-pUC19 conjugate with spermine was endothermic and primarily entropy-driven. The condensed plasmid displayed severe conformational stress and deviation from the B-form due to the compact packing of the DNA but better transfection ability than the pristine CD. The CDs in the condensates tend to come close to each other at the core that results in their shielding from excitation. However, this does not prevent them from emanating reactive oxygen species on visible light exposure that compromises the decondensation process and cell viability at higher exposure times, calling for utmost caution in establishing them as nonviral transfecting agents universally.

INASL-ISN Joint Position Statements on Management of Patients with Simultaneous Liver and Kidney Disease.

Renal dysfunction is very common among patients with chronic liver disease, and concomitant liver disease can occur among patients with chronic kidney disease. The spectrum of clinical presentation and underlying etiology is wide when concomitant kidney and liver disease occur in the same patient. Management of these patients with dual onslaught is challenging and requires a team approach of hepatologists and nephrologists. No recent guidelines exist on algorithmic approach toward diagnosis and management of these challenging patients. The Indian National Association for Study of Liver (INASL) in association with Indian Society of Nephrology (ISN) endeavored to develop joint guidelines on diagnosis and management of patients who have simultaneous liver and kidney disease. For generating these guidelines, an INASL-ISN Taskforce was constituted, which had members from both the societies. The taskforce first identified contentious issues on various aspects of simultaneous liver and kidney diseases, which were allotted to individual members of the taskforce who reviewed them in detail. A round-table meeting of the Taskforce was held on 20-21 October 2018 at New Delhi to discuss, debate, and finalize the consensus statements. The evidence and recommendations in these guidelines have been graded according to the Grading of Recommendations Assessment Development and Evaluation (GRADE) system with minor modifications. The strength of recommendations (strong and weak) thus reflects the quality (grade) of underlying evidence (I, II, III). We present here the INASL-ISN Joint Position Statements on Management of Patients with Simultaneous Liver and Kidney Disease.

Hybrid DNA-Carbon Dot-Poly(vinylpyrrolidone) Hydrogel with Self-Healing and Shape Memory Properties for Simultaneous Trackable Drug Delivery and Visible-Light-Induced Antimicrobial Photodynamic Inactivation.

A two-step methodology for simultaneous conjugation of DNA and poly(vinylpyrrolidone) (PVP) polymer to a single carbon quantum dot (CD) is demonstrated for the first time to fabricate a pH-responsive DNA-CD-PVP hybrid hydrogel. Cross-linking in the hydrogel was achieved using CD as the common nucleus through the formation of DNA I-motif conformation at neutral to acidic pH and noncovalent interaction of PVP that infuse self-healing and shape memory properties in the hydrogel. The hydrogel is capable of loading and sustained delivery of drugs for more than 2 weeks as demonstrated using a model drug, Hemin. The quenching of fluorescence of CD by Hemin was trackable even through simple visual monitoring, which showed that Hemin can diffuse from the loaded part to the unloaded part of the hydrogel during the self-healing process. Most significantly, the chosen CD generates reactive oxygen species (ROS) upon visible light irradiation, armoring the hydrogel with worthy antimicrobial activity. Biocompatibility of the DNA-CD-PVP hydrogel was established on human fibroblast cells, indicating their potential use in biomedical area pertaining to wound healing.

Carbon dot cross-linked polyvinylpyrrolidone hybrid hydrogel for simultaneous dye adsorption, photodegradation and bacterial elimination from waste water.

The creation of a polymeric hydrogel from polyvinylpyrrolidone (PVP) cross-linked by Carbon Quantum Dots (CD) for the adsorption and photocatalytic degradation of both cationic and anionic dyes. PVP, an important biocompatible constituent and often surplus in cosmetic industry, was carboxylated through NaOH refluxing and covalently conjugated to surface amine functionality of CD derived from lemon juice and Cysteamine. The hybrid hydrogel was obtained from PVP-CD covalent conjugate by careful manipulation of pH and found to possess better rheological properties than only carboxylate-PVP. The monolayer physisorption of the dyes on the hydrogel was affected by hydrogen bonding, dispersion or inductive effect, and π-π interaction with the polymer backbone as well as the CD that followed pseudo-second-order kinetics. Degradation of the adsorbed dyes was instated by the unique Reactive Oxygen Species (ROS) generating ability of the CD embedded in the hydrogel matrix upon exposure to sunlight, the mechanism of which is also unveiled. The same CD-induced ROS was found to effectively annihilate both gram-positive and gram-negative bacteria in real polluted water in less than 10 min of photoexcitation of the hydrogel. The hydrogel was restored by mild acid wash that is able to perform dye adsorption and photo-degradation upto four cycles.