Sardar Uddin

Sardar Uddin

New York City Metropolitan Area
486 followers 403 connections

About

Clinical scientist and study manager with 10+ years of experience in oncology…

Articles by Sardar

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Experience

  • L2P Research Labs Graphic
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    United States

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    Connecticut, United States

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    Stony Brook, NY

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    Stony Brook, NY

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    Greater New York City Area

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    New York, NY

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Education

Licenses & Certifications

Publications

  • Chondro-protective effects of low intensity pulsed ultrasound

    Osteoarthritis and Cartilage

    Osteoarthritis is degenerative cartilage disorder that currently affects approximately 52.5 million Americans. Currently, there is no treatment for osteoarthritis and in most cases joints are surgically replaced with artificial joints. Surgical intervention is expensive, as well as prone to repeated surgeries. This study examined the use of Low-Intensity Pulsed Ultrasound in osteoarthritic cartilage. Human cartilage was treated with ultrasound for 20 min per day and cartilage regeneration was…

    Osteoarthritis is degenerative cartilage disorder that currently affects approximately 52.5 million Americans. Currently, there is no treatment for osteoarthritis and in most cases joints are surgically replaced with artificial joints. Surgical intervention is expensive, as well as prone to repeated surgeries. This study examined the use of Low-Intensity Pulsed Ultrasound in osteoarthritic cartilage. Human cartilage was treated with ultrasound for 20 min per day and cartilage regeneration was quantified using different biomarkers. The results from the study showed that ultrasound not only induced the formation of new cartilage but also slowed the breakdown of cartilage in the presence of inflammatory cytokines. The study provided detailed ex vivo analysis of cartilage regeneration and the potential application of ultrasound as a non-invasive treatment for osteoarthritis.

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  • Identification and Characterization of a Synthetic Osteogenic Peptide

    Calcified Tissue International

    More than 54 million Americans are diagnosed with osteoporosis and 1.5 million experience osteoporosis-related fractures every year. Therapeutic drugs are limited in their efficacy due to problems in resulting bone quality. In this study, we used an algorithm to design a biological molecule with similarity to the calcitonin receptor, named calcitonin receptor fragment peptide (CRFP). This two-part study showed increased levels of differentiation of stem cells into osteoblasts. The treatment of…

    More than 54 million Americans are diagnosed with osteoporosis and 1.5 million experience osteoporosis-related fractures every year. Therapeutic drugs are limited in their efficacy due to problems in resulting bone quality. In this study, we used an algorithm to design a biological molecule with similarity to the calcitonin receptor, named calcitonin receptor fragment peptide (CRFP). This two-part study showed increased levels of differentiation of stem cells into osteoblasts. The treatment of ovariectomized rats (OVX), showed a 55% increase in trabecular bone volume. Our study shows effects of CRFP bone at the cellular and organ level, indicating the skeletal bioactivity of the molecule and its potential therapeutic application in treating osteopenia and osteoporosis.

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  • Dynamic acoustic radiation force retains bone structural and mechanical integrity in a functional disuse osteopenia model

    Bone

    Low-Intensity Pulsed Ultrasound has been approved by the FDA for bone fracture healing since 1994. This study was designed to investigate the effects of Low-Intensity Pulsed Ultrasound as a countermeasure to bone loss due to aging and microgravity. The results from animal studies show that ultrasound can significantly increase bone quality, quantity, and mechanical strength after 4 weeks of stimulation. Bone quality was assessed at histological, morphological, and molecular levels. The data…

    Low-Intensity Pulsed Ultrasound has been approved by the FDA for bone fracture healing since 1994. This study was designed to investigate the effects of Low-Intensity Pulsed Ultrasound as a countermeasure to bone loss due to aging and microgravity. The results from animal studies show that ultrasound can significantly increase bone quality, quantity, and mechanical strength after 4 weeks of stimulation. Bone quality was assessed at histological, morphological, and molecular levels. The data from the study illustrated the potential applications of ultrasound are not only limited to osteopenia and osteoporosis but can also help astronauts retain their bone mass and density in space exploration (NASA Mars 2030).

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  • Three TNFR-binding domains of PGRN act independently in inhibition of TNFα binding and activity

    Frontiers in Bioscience

    Progranulin is a growth factor that has been previously shown to inhibit inflammation in different inflammatory pathologies. Dr. Liu’s lab has shown that progranulin inhibits tumor necrosis factor alpha (TNFα) receptor. This study was conducted to investigate the direct binding of progranulin to TNFα receptor. The protein interaction analysis revealed that progranulin binds directly to TNFα receptor at three specific domains. The data from the study will help to engineer new therapeutic drugs…

    Progranulin is a growth factor that has been previously shown to inhibit inflammation in different inflammatory pathologies. Dr. Liu’s lab has shown that progranulin inhibits tumor necrosis factor alpha (TNFα) receptor. This study was conducted to investigate the direct binding of progranulin to TNFα receptor. The protein interaction analysis revealed that progranulin binds directly to TNFα receptor at three specific domains. The data from the study will help to engineer new therapeutic drugs directly targeting TNFα receptor to treat inflammatory diseases such as rheumatic arthritis, bowel diseases, and psoriasis.

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  • Progranulin inhibition of TNF Alpha

    Immunology and Cell Biology

    Increased levels of TNFα are known to play an important role in inflammatory diseases such as rheumatic arthritis. Tang et al., presented data to show that progranulin inhibits TNFα. This study used extended protein-to-protein analyses to provide further the evidence for TNFα inhibition by progranulin. The paper strengthens the potential therapeutic value of progranulin as a drug to treat inflammatory diseases.

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  • Progranulin directly binds to the CRD2 and CRD3 of TNFR extracellular domains

    FEBS Letts

    Tang et al., previously reported that progranulin (PGRN) directly binds to TNF receptors (TNFR) in vitro and in chondrocytes. This study shows that PGRN is also associated with TNFR in splenocytes and inhibits the binding of TNFα to immune cells. Proper folding of PGRN is essential for its binding to TNFR, as dithiothreitol (DTT) treatment abolished its binding to TNFR. In contrast, the binding of PGRN to Sortilin was enhanced by DTT. Protein interaction assays with mutant forms of the TNFR…

    Tang et al., previously reported that progranulin (PGRN) directly binds to TNF receptors (TNFR) in vitro and in chondrocytes. This study shows that PGRN is also associated with TNFR in splenocytes and inhibits the binding of TNFα to immune cells. Proper folding of PGRN is essential for its binding to TNFR, as dithiothreitol (DTT) treatment abolished its binding to TNFR. In contrast, the binding of PGRN to Sortilin was enhanced by DTT. Protein interaction assays with mutant forms of the TNFR extracellular domain demonstrated that the CRD2 and CRD3 domains of TNFR are important for its interaction with PGRN, similar to the binding to TNFα. Taken together, these findings provide the molecular basis underlying PGRN/TNFR interaction and PGRN-mediated anti-inflammatory activity in various autoimmune diseases and conditions.

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  • Reversal of the detrimental effects of simulated microgravity on human osteoblasts by modified low intensity pulsed ultrasound.

    PLoS One

    Microgravity (MG) is known to induce bone loss in astronauts during long-duration space missions due to lack of sufficient mechanical stimulation. It has been demonstrated that mechanical signals are essential to maintain cell viability and motility and possibly serve as a countermeasure to the catabolic effects of MG. The objective of this study was to examine the effects of high-frequency acoustic wave signals on osteoblasts (bone forming cells) in a simulated microgravity (SMG) environment…

    Microgravity (MG) is known to induce bone loss in astronauts during long-duration space missions due to lack of sufficient mechanical stimulation. It has been demonstrated that mechanical signals are essential to maintain cell viability and motility and possibly serve as a countermeasure to the catabolic effects of MG. The objective of this study was to examine the effects of high-frequency acoustic wave signals on osteoblasts (bone forming cells) in a simulated microgravity (SMG) environment (created using 1D clinostat bioreactor) using a modified low intensity pulsed ultrasound (mLIPUS). This study evaluated the effects of mLIPUS on osteoblasts in simulated microgravity conditions. Effects of SMG with mLIPUS were analyzed via cell proliferation and extracellular matrix deposition. The data showed that mLIPUS mitigated the adverse effects of microgravity on osteoblasts and allowed them to retain normal cellular activity. The data suggest that this type of acoustic wave can potentially be used as a countermeasure for disuse osteopenia.

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  • Low-intensity Amplitude Modulated Ultrasound Increases Osteoblastic Mineralization

    Cellular and Molecular Bioengineering

    The purpose of this study was to assess the effects of pulsed amplitude modulated ultrasound (pAMUS) on the level of mineralization in osteoblast cells in comparison to cells stimulated with low-intensity pulsed ultrasound (LIPUS). To make the ultrasound effects more enhanced and targeted at regions of interest, this study used a novel approach of applying pulsed amplitude modulated ultrasound to osteoblast cells. The pAMUS signal was generated using two signal generators. The pulsed signal was…

    The purpose of this study was to assess the effects of pulsed amplitude modulated ultrasound (pAMUS) on the level of mineralization in osteoblast cells in comparison to cells stimulated with low-intensity pulsed ultrasound (LIPUS). To make the ultrasound effects more enhanced and targeted at regions of interest, this study used a novel approach of applying pulsed amplitude modulated ultrasound to osteoblast cells. The pAMUS signal was generated using two signal generators. The pulsed signal was amplified by a power amplifier and drove two identical focused ultrasound probes, focusing at the same point in the culture dish. The effect of the signal was studied using osteoblasts (bone formation cells) at time points Day 7, 12, and 18. The cells were analyzed for activity and calcium mineralization. The pAMUS significantly increased the activity and matrix calcification in comparison with LIPUS stimulated cultures. The study for the first time used a pAMUS signal to increase bone formation and showed increased efficacy compared to standard LIPUS.

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  • Integrin alpha2beta1 affects mechno-transduction in slowly and rapidly adapting cutaneous mechoreceptors in rat hairy skin.

    Neuroscience

    How does human skin feel touch? To study this basic question, this study looked at nerve endings in the skin and protein structures connecting nerves to the skin tissue. The most sensitive spot of a mechanoreceptor's receptive field in the skin was identified and then stimulated using controlled compressive stresses. Loads were applied before, during, and after passive diffusion into the skin of a function-blocking anti-integrin alpha2 monoclonal antibody (FBmAb) or one of two types of control…

    How does human skin feel touch? To study this basic question, this study looked at nerve endings in the skin and protein structures connecting nerves to the skin tissue. The most sensitive spot of a mechanoreceptor's receptive field in the skin was identified and then stimulated using controlled compressive stresses. Loads were applied before, during, and after passive diffusion into the skin of a function-blocking anti-integrin alpha2 monoclonal antibody (FBmAb) or one of two types of control antibodies (immunoglobulin G or an FBmAb conjugated with a secondary antibody). Following removal of the FBmAb, the effects in some neurons were partially reversible. Taken together, the data from this study show that integrin alpha2beta1 plays a significant role in modulating the mechanoreceptive response to compressive indentation. The data from this study will help to engineer new localized anesthesia for local surgeries and other procedures

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    • Michael Hadjiargyrou
    • Partab S Khalsa
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Courses

  • Communicating Science: Improvisation for Scientists (Alan Alda Center of Communication)

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  • SciPhD, The Business of Science for Scientists

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Languages

  • Urdu

    Native or bilingual proficiency

  • English

    Full professional proficiency

Organizations

  • Orthopaedic Research Society

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    - Present

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