Publications by authors named "Subhankar Sarkar"

The pathological jaundice in neonates develops due to hematological, infectious, surgical causes. We present an interesting case of persistent neonatal hyperbilirubinemia, who was diagnosed to have urinary tract infection (UTI) and effectively managed. Unexplained persistent neonatal jaundice, poor response to phototherapy, and higher rebound total serum bilirubin levels should be evaluated for UTI.

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An efficient and exceptional method for cleaving the C-N bond in α-amino carbonyl compounds has been developed using ,,','-tetraalkylthiuram disulfides (TATDs), iodine(III) reagent phenyliodine diacetate (PIDA), and ,-diisopropylethylamine. The PIDA reagent effectively facilitates an oxidative thioamidation process, affording α-keto thioamide derivatives in high yields under solvent-free (neat) conditions. This approach enables the synthesis of α-keto thioamides through a sequence of CS and C-N bond formations.

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Background And Objective: Asthma is a common respiratory disease in pregnancy, with approximately 18% of cases worsening. Small airway disease (SAD) with a reported prevalence of up to 70% is now recognised as a principal indicator of poor asthma control. Impulse oscillometry (IOS) is a non-invasive, technically easier, and patient-friendly tool for detecting SAD.

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Glanzmann thrombasthenia (GT) is a rare haematological disorder with abnormal platelet surface receptor glycoprotein IIb/IIIa, resulting in faulty platelet aggregation. Patients with GT may present with spontaneous bleeding after trauma or surgery. As the disease is rare, controlling and preventing bleeding in such patients is challenging.

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Background: Optimal dosing of rituximab when given with mycophenolate mofetil (MMF) for frequently relapsing nephrotic syndrome/steroid-dependent nephrotic syndrome (FRNS/SDNS) remains uncertain.

Methods: This was a prospective, non-inferiority, open-label randomized controlled multicentre study. Children (2-18 years old) with difficult FRNS/SDNS were randomized to group A (rituximab 375 mg/m once) or group B (rituximab 375 mg/m twice; 7-14 days apart) followed by continuous MMF and 3 months of tapered steroids.

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Background Cervical cancer (CC) is the second most common cancer among Indian women and is caused by a human papillomavirus (HPV) infection. To achieve its global commitment to the elimination of CC, India is planning to include the HPV vaccine in its national immunization program. The success of the prevention of CC mostly depends on the level of awareness and knowledge among healthcare providers about different aspects of the disease and the vaccine.

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Background: Levamisole is less expensive and has a better toxicity profile compared to other steroid sparing agents used in nephrotic syndrome. It has a plasma half-life of 2.0 to 5.

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We have introduced a sulfoximidation reaction initiated by visible light between α-phenyl vinyl azides and NH-sulfoximines. The cost-effective and readily accessible hypervalent iodine reagent (PIDA) easily promoted the oxidative sulfoximidation process to afford -α-ketoacylated sulfoximines in good to high yields, involving the formation of two new C-O bonds and one C-N bond. Additionally, the protocol offers noteworthy advantages, including its metal-free and photocatalyst-free reaction and its broad substrate compatibility.

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Background: Levamisole is a commonly used steroid-sparing agent (SSA), but the reported incidence of antineutrophil cytoplasmic antibody (ANCA) positivity has been concerning.

Methods: Observational cross-sectional study wherein children aged 2 to 18 years with frequently relapsing/steroid dependent nephrotic syndrome (FRNS/SDNS) on levamisole for ≥ 12 months were tested for ANCA.

Results: A total of 210 children (33% female), median age of 7.

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Background: The subfamily Luciolinae Lacordaire, 1857, a group of flashing fireflies, is composed of approximately 400 described species in the world. Though the taxonomy of this group has been fairly well established in Southeast (SE) Asia and the Australopacific Region, there is scope of gathering further information regarding taxonomic knowledge on this group from India. Until now, 32 Luciolinae species from nine genera have been reported from India, which is only about 8% (32 out of 400) of the world Luciolinae fauna.

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A convenient and new synthetic approach has been developed for the oxidative cross-coupling of the C-N bond through the reaction between arylglyoxylic acids and tetraalkylthiuram disulfides. The reaction proceeds under ambient air at room temperature in the presence of visible light. This reaction offers a metal-, base-, photocatalyst-, and solvent-free synthesis of various α-ketoamides with moderate to excellent yields via the radical pathway.

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Here, we investigated the diversity of Sericini in the faunistically rather unknown Lower Gangetic plains in North India, based on material from the collection of the Zoological Survey of India. We discovered one new species from West Bengal, Maladerakolkataensis Bhunia, Gupta, Sarkar & Ahrens, and provide further records of an additional 23 species belonging to five genera from the lowlands of the states Bihar and West Bengal. Out of these, 21 species represent new state records: 12 for Bihar and nine for West Bengal.

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We report a new type of fossil margin galls arranged in a linear series on dicot leaf impressions from the latest Neogene (Pliocene) sediments of the Chotanagpur Plateau, Jharkhand, eastern India. We collected ca. 1500 impression and compression leaf fossils, of which 1080 samples bear arthropod damage referable to 37 different damage types (DT) in the 'Guide to Insect (and Other) Damage Types in Compressed Plant Fossils'.

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Acute kidney injury (AKI) is a known independent risk factor for morbidity/mortality but there is scarcity of robust data on it among childhood nephrotic syndrome (NS). We assessed the incidence of AKI among hospitalized children with NS as well as looked for any significant risk factors. Prospective observational study conducted across two tertiary pediatric hospitals in Eastern India from September 2020 to August 2021.

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The in vitro diagnostics of cancer are not represented well yet, but the need for early-stage detection is undeniable. In recent decades, surface-enhanced Raman spectroscopy (SERS) has emerged as an efficient, adaptable, and unique technique for the detection of cancer molecules in their early stages. Herein, we demonstrate an opto-plasmonic hybrid structure for sensitive detection of the prostate cancer biomarker sarcosine using silica nanospheres coated silver nano-islands as a facile and efficient SERS active substrate.

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1-Butane sulfonic acid-3-methylimidazolium tosylate, [BSMIM]OTs, is a remarkable catalyst for the cascade synthesis of coumarin-functionalized indole derivatives a tandem cyclization reaction of aniline and phenylglyoxal monohydrate. This reaction possibly proceeds through imine formation/nucleophilic addition/cyclization. In addition, this method shows lower -factors.

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In recent years several important viral infections have emerged and antiviral chemotherapeutic agents are not sufficiently effective in clinic, leading to serious human diseases and mortality. Therefore, novel antiviral candidates are urgently desirable, which undoubtedly is essential for the therapy of various fatal and debilitating viral infections. Heterocyclic compounds are obtaining importance in the field of medicinal chemistry because of the broad spectrum of their physiological activities.

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Acute kidney injury (AKI) is a well-known life-threatening systemic effect of snake envenomation which commonly happens secondary to snake bites from families of Viperidae and Elapidae. Enzymatic toxins in snake venom result in injuries to all kidney cell types including glomerular, tubulo-interstitial and kidney vasculature. Pathogenesis of kidney injury due to snake envenomation includes ischaemia secondary to decreased kidney blood flow caused by systemic bleeding and vascular leakage, proteolytic degradation of the glomerular basement membrane by snake venom metalloproteinases (SVMPs), deposition of microthrombi in the kidney microvasculature (thrombotic microangiopathy), direct cytotoxic action of venom, systemic myotoxicity (rhabdomyolysis) and accumulation of large amounts of myoglobin in kidney tubules.

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