Publications by authors named "Sumit Arora"

Cryptococcus is a common organism causing central nervous system disease in people living with HIV (PLHIV). The treatment of this infection entails a costly regimen of Amphotericin. World Health Organization (WHO) recently recommended a cost-effective single high-dose regimen with liposomal amphotericin B for the treatment of cryptococcal meningitis.

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Pharmaceutical innovators and generic companies use Physiologically Based Biopharmaceutics Models (PBBMs) to guide drug product development and potentially waive clinical pharmacokinetic studies for both pre- and postapproval changes. This modeling approach can assist with biopharmaceutics risk assessment and the establishment of patient centric, clinically relevant drug product specifications. However, the variability of possible model strategies and the existence of gaps in scientific knowledge associated with the lack of standardized regulatory expectations for model parametrization, data requirements for model development, and criteria for fit-for-purpose model validation leads to varied acceptance rates and frequent requests for additional information and deficiencies in PBBM submissions across regulatory agencies.

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Introduction: In the changing HIV treatment landscape, the focus shifts to persons living with HIV (PLH) experiencing virological non-suppression on second-line antiretroviral therapy (ART). This includes understanding viral genetic profiles, antiretroviral susceptibility, and the effectiveness of protease inhibitors (PIs) amid evolving dolutegravir-based regimen recommendations.

Methods: In this retrospective study, PLH with first-line ART failure transitioned to second-line ART (dual NRTI + ritonavir-boosted PI) between September 2015 and October 2018.

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Case: We present an unusual case of metachronous multicentric giant cell tumor (GCT) of forearm bones in a 38-year-old male patient with an 8-year follow-up. The diagnosis was established by imaging and histopathology. He underwent multiple surgeries with extraperiosteal resection of lesions with free fibular grafts.

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The research aimed to assess the effect of polysaccharides (maltodextrin and β-cyclodextrin) on technological properties of low-lactose milk powder obtained by spray drying of β-galactosidase hydrolysed milk. Low-lactose milk powders i.e.

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Background: The influence of advanced imaging modalities on the reliability of 2018 AO/OTA classification and detection of features contributing to fracture instability have not been adequately studied in the literature.

Methods: This prospective study was conducted to assess the reliability of 2018 AO/OTA classification for trochanteric femoral fractures, and features of instability in 50 patients using radiographs, multiplanar reformats (MPR), and 3D-reconstruction with fracture segmentation (3DR-FS) by 3 observers on 2 occasions at an interval of 4 weeks.

Results: Mean inter-observer reliabilities on radiographs, MPR, 3DR-FS were 0.

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Case: We present a case of isolated tuberculous osteomyelitis of the calcaneus in an immune-competent adult patient with a 5-year follow-up. The diagnosis was established by core needle aspiration and biopsy. He was treated with antituberculous chemotherapy and immobilization.

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This report summarizes the proceedings for Day 3 of the workshop titled "". This day focused on the current and future drug product quality applications of PBBM from the innovator and generic industries as well as the regulatory agencies perspectives. The presentations, which included several case studies, covered the applications of PBBM in generic drug product development, applications of virtual bioequivalence trials to support formulation bridging and the utility of absorption modeling in clinical pharmacology assessments.

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Background: Severe elbow deformities are common in developing countries because of neglect or as a result of prior treatment that achieved poor reduction. Various osteotomy techniques have been defined for the surgical correction of elbow deformities. However, severe elbow deformities (>30°) pose a substantial challenge for surgeons because limited surgical options with high complication rates have been described in the literature.

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The proceedings from the 30th August 2023 (Day 2) of the workshop "Physiologically Based Biopharmaceutics Models (PBBM) Best Practices for Drug Product Quality: Regulatory and Industry Perspectives" are provided herein. Day 2 covered PBBM case studies from six regulatory authorities which provided considerations for model verification, validation, and application based on the context of use (COU) of the model. PBBM case studies to define critical material attribute (CMA) specification settings, such as active pharmaceutical ingredient (API) particle size distributions (PSDs) were shared.

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This Article shares the proceedings from the August 29th, 2023 (day 1) workshop "Physiologically Based Biopharmaceutics Modeling (PBBM) Best Practices for Drug Product Quality: Regulatory and Industry Perspectives". The focus of the day was on model parametrization; regulatory authorities from Canada, the USA, Sweden, Belgium, and Norway presented their views on PBBM case studies submitted by industry members of the IQ consortium. The presentations shared key questions raised by regulators during the mock exercise, regarding the PBBM input parameters and their justification.

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Lactose hydrolysed concentrated milk was prepared using β-galactosidase enzyme (4.76U/mL) with a reaction period of 12 h at 4 °C. Addition of polysaccharides (5 % maltodextrin/β-cyclodextrin) to concentrated milk either before or after lactose hydrolysis did not result in significant differences (p > 0.

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Physiologically based biopharmaceutics modeling (PBBM) is used to elevate drug product quality by providing a more accurate and holistic understanding of how drugs interact with the human body. These models are based on the integration of physiological, pharmacological, and pharmaceutical data to simulate and predict drug behavior in vivo. Effective utilization of PBBM requires a consistent approach to model development, verification, validation, and application.

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Sorbitol has been the new and emerging adulterant in dairy industry. The main aim of the study was to develop a method to detect sorbitol in milk, which is not affected by other sugars, polyols and formalin. Hence, a thin layer chromatographic (TLC) method was standardized to detect the sorbitol in milk.

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Aims: The current work describes the development of mechanistic vaginal absorption and metabolism model within Simcyp Simulator to predict systemic concentrations following vaginal application of ring and gel formulations.

Methods: Vaginal and cervix physiology parameters were incorporated in the model development. The study highlights the model assumptions including simulation results comparing systemic concentrations of 5 different compounds, namely, dapivirine, tenofovir, lidocaine, ethinylestradiol and etonogestrel, administered as vaginal ring or gel.

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Article Synopsis
  • A study compared the traditional posterior approach and a modified quadriceps coxae sparing (QCS) approach in total hip arthroplasty (THA) to assess joint stability, component placement, and functional outcomes.
  • The QCS approach showed significantly better intraoperative hip stability, with no dislocations occurring, while maintaining similar surgical exposure and component placement accuracy compared to the posterior approach.
  • Both approaches had similar surgery duration, blood loss, and functional outcomes at one year, indicating that preserving the quadriceps coxae tendons benefits stability without compromising effectiveness.
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Background: Genu valgum is a common disorder affecting adolescents and young adults. Treatment of this disorder requires restoration of normal mechanical axis alignment and joint orientation, for which it is important to assess whether the deformity arises from the distal femur, knee joint, or proximal tibia. Most commonly, the deformity originates from the distal femur, and various osteotomies of the distal femur have been described.

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Background: Dolutegravir (DTG) is a novel yet preferential first- and -second-line treatment for persons living with HIV (PLH). Owing to its recent introduction, DTG-based regimens have not undergone a comprehensive, systematic evaluation regarding their real-world utilization and safety profile among a sizeable Indian population.

Objective: This study aimed to assess the 24 week immunovirological outcomes, anthropometric and metabolic changes, tolerability, and adverse events (AEs) of DTG-based antiretroviral (ART) regimens.

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Article Synopsis
  • * The study compared two fixed-dose combinations (FDCs): a dual FDC (etoricoxib and thiocolchicoside) and a triple FDC (chlorzoxazone, diclofenac, and paracetamol) among 200 adults with LBP and muscle spasms over 28 days.
  • * Both combinations showed similar pain reduction and functional improvement, but DFC was more effective in improving severe pain and disability in some subjects without notable side effects.
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Ghee is a premium product in Southeast Asia and is prone to adulteration with vegetable oils/ fats. The main aim of the study was to develop an easy-to-use paper-based sensor to detect this adulteration. Hence, a protocol involving hexane and acetonitrile for the extraction of synthetic antioxidants from adulterated ghee and its rapid detection using DPPH was standardized.

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Reverse osmosis (RO) is known for the economic dewatering of dairy streams without any change in phase. At the household level, surplus milk is fermented and churned to obtain butter, which is subsequently heated to obtain clarified milk fat (). The production of 1 kg generates 15-20 kg sour buttermilk (SBM) as a by-product that is mostly drained.

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Acquired hallux varus deformity secondary to postburn contracture is a rare condition. It causes cosmetic disfigurement, pain, and inability to wear a shoe. Soft-tissue procedures and tendon transfers have been described for correction; however, these may require multiple operations and the outcome may be poor.

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Article Synopsis
  • The study assessed how low-intensity blood flow restriction (BFR) training combined with high-intensity resistance training (HI-RT) impacts the jumping performance of long jump athletes.
  • Eight athletes were assigned to either HI-RT or the combined training regimen, with muscle power and strength measured at the start, 3 weeks, and 6 weeks into the training.
  • Results showed that the combined training group had significant improvements in muscle strength and jumping performance compared to the HI-RT group, indicating that using both training methods together is beneficial for long jumpers.
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