Search

Your search keyword '"Avula, M"' showing total 22 results
Start Over Author "Avula, M"
22 results on '"Avula, M"'

3. Global effort to evacuate Ukrainian children with cancer and blood disorders who have been affected by war

Author

Agulnik, A, Kizyma, R, Salek, M, Wlodarski, M, Pogorelyy, M, Oszer, A, Yakimkova, T, Nogovitsyna, Y, Dutkiewicz, M, Dalle, J, Dirksen, U, Eggert, A, Fernandez-Teijeiro, A, Greiner, J, Kraal, K, Mueller, A, Sramkova, L, Zecca, M, Wise, P, Mlynarski, W, Avula, M, Adyrov, M, Berlanga, P, Blackwood, C, Bouffet, E, Czauderna, P, de Koning, L, dos Reis Farinha, N, Foster, W, Graetz, D, Gupta, S, Holter, W, Hough, R, Kliuchkivska, K, Kolenova, A, Kolodrubiec, J, Moreira, D, Mukkada, S, Mykychak, I, Raciborska, A, Salman, Z, Sopilnyak, A, Tyupa, S, Vinitsky, A, Wobst, N, Miller, B, Rasul, S, Rodriguez-Galindo, C, Alanbousi, I, Alexander, S, Apel, A, Bal, W, Balwierz, W, Basset-Salom, L, Bastardo Blanco, D, Bauer, K, Bayazitov, I, Bhakta, N, Bien, E, Bieniek, K, Blair, S, Bodak, K, Bordeianu, I, Braganca, J, Bucurenci, M, Budny, E, Budzyn, A, Bumgardner, C, Burditt, R, Burnside Clapp, V, Bykov, V, Canete, A, Carnelli, M, Cela, E, Cepowska, Z, Chaber, R, Cherner-Drieux, A, Chubata, M, Clough, H, Czernicka - Siwecka, J, Czyzewski, K, Dashchakovska, O, Dembowska-Baginska, B, Derwich, K, Dommett, R, Dorosh, O, Drabko, K, Dragomir, M, Dworzak, M, Dyma, S, Earl, J, English, M, Evseev, D, Farren, B, Fedyk, N, Ferneza, S, Fox Irwin, L, Galazkowski, R, Ganieva, G, Garanzha, V, Gelman, M, Godzinski, J, Goeres, A, Golban, R, Griksaitis, M, Hampel, M, Hastings, S, Heenen, D, Hill, M, Holiuk, I, Hutnik, L, Irga-Jaworska, N, Istomin, O, Janczar, S, Kacharian, A, Kalwak, K, Karolczyk, G, Karpenko, N, Katsubo, H, Kaznowska, B, Kentsis, A, Ketteler, P, Kienesberger, A, Kiselev, R, Kizyma, Z, Klymniuk, H, Kostiuk, Y, Kowalik, T, Kozlova, O, Kozubenko, V, Kramar, T, Krawczuk-Rybak, M, Kulemzina, I, Kurkowska, P, Kuzyk, A, Ladenstein, R, Laguna, P, Lassaletta, A, Lehmberg, K, Leontieva, O, Liashenko, S, Loizou, L, Lucchetta, S, Lupo, M, Lysytsia, L, Lysytsia, O, Machnik, K, Mainland, J, Matczak, K, Matysiak, M, Mayeur, P, Minervina, A, Mishkova, V, Mizia-Malarz, A, Morales La Madrid, A, Moreno, L, Moskvin, V, Muszynska-Roslan, K, Nelson, A, Ociepa, T, Oltolini, S, Onipko, N, Pappas, A, Patel, A, Patrahau, A, Pauley, J, Pavlenko, Y, Pavlovych, A, Peregud-Pogorzelski, J, Perek-Polnik, M, Perez, V, Perez-Martinez, A, Pikman, Y, Pitozzi, G, Portugal, R, Posternak, V, Prete, A, Pritchard-Jones, K, Radaelli, A, Reeves, T, Reinhardt, D, Reshetnyak, A, Rider, A, Rizzari, C, Rizzi, D, Rodriguez Hermosillo, K, Ronenko, O, Rostowska, A, Rudko, L, Sakaan, F, Sakhar, N, Savva, N, Scaccaglia, D, Schaeffer, E, Schneider, C, Scobie, N, Semeniuk, O, Shevchyk, R, Shuler, A, Shvets, S, Skoczen, S, Smeal, W, Sokolowski, I, Sonkin, A, Stepanjuk, A, Spota, A, Sterba, J, Styczynski, J, Svintsova, O, Synyuta, A, Szczepanski, T, Szczucinski, P, Szmyd, B, Tasso Cereceda, M, Teliuk, A, Tomanek, I, Topping, P, Torrent, M, Trelinska, J, Troyanovska, O, Trubnikova, E, Tsurkan, L, Tsymbalyuk-Voloshyn, I, Urasinski, T, Urbanek-Dadela, A, Vasilieva, N, Vasilyeva, A, Verdu-Amoros, J, Vilcu-Bajurean, N, Vinitsky, L, Volpe, G, Vorobel, O, Wachowiak, J, Wasiak, M, Wiedower, L, Wuenschel, L, Wysocki, M, Yurieva, M, Zagurska, A, Zakharenko, S, Zakharenko, A, Zapotochna, K, Zawitkowska, J, Agulnik A., Kizyma R., Salek M., Wlodarski M. W., Pogorelyy M., Oszer A., Yakimkova T., Nogovitsyna Y., Dutkiewicz M., Dalle J. -H., Dirksen U., Eggert A., Fernandez-Teijeiro A., Greiner J., Kraal K., Mueller A., Sramkova L., Zecca M., Wise P. H., Mlynarski W., Avula M., Adyrov M. V., Berlanga P., Blackwood C. A., Bouffet E., Czauderna P. S., de Koning L. A., dos Reis Farinha N. J., Foster W. B., Graetz D. E., Gupta S., Holter W., Hough R. E., Kliuchkivska K., Kolenova A., Kolodrubiec J., Moreira D. C., Mukkada S. T., Mykychak I., Raciborska A., Salman Z. S., Sopilnyak A., Tyupa S., Vinitsky A., Wobst N. M., Miller B. A., Rasul S. S., Rodriguez-Galindo C., Alanbousi I., Alexander S. W., Apel A., Bal W. A., Balwierz W. A., Basset-Salom L., Bastardo Blanco D., Bauer K. J., Bayazitov I. T., Bhakta N. H., Bien E. I., Bieniek K. A., Blair S. J., Bodak K. I., Bordeianu I. M., Braganca J. M., Bucurenci M. S., Budny E. B., Budzyn A., Bumgardner C. C., Burditt R. N., Burnside Clapp V. G., Bykov V., Canete A., Carnelli M., Cela E., Cepowska Z. P., Chaber R., Cherner-Drieux A., Chubata M., Clough H. M., Czernicka - Siwecka J., Czyzewski K., Dashchakovska O., Dembowska-Baginska B. M., Derwich K., Dommett R., Dorosh O., Drabko K. A., Dragomir M. D., Dworzak M., Dyma S., Earl J. D., English M. W., Evseev D. A., Farren B. S., Fedyk N., Ferneza S., Fox Irwin L. E., Galazkowski R. M., Ganieva G., Garanzha V., Gelman M. S., Godzinski J. K., Goeres A. F., Golban R., Griksaitis M. J., Hampel M. A., Hastings S. G., Heenen D. L., Hill M. C., Holiuk I., Hutnik L. M., Irga-Jaworska N., Istomin O., Janczar S. L., Kacharian A., Kalwak K., Karolczyk G. M., Karpenko N. M., Katsubo H., Kaznowska B. J., Kentsis A., Ketteler P., Kienesberger A., Kiselev R., Kizyma Z., Klymniuk H., Kostiuk Y., Kowalik T., Kozlova O., Kozubenko V., Kramar T., Krawczuk-Rybak M., Kulemzina I., Kurkowska P., Kuzyk A. S., Ladenstein R. L., Laguna P. J., Lassaletta A., Lehmberg K., Leontieva O., Liashenko S., Loizou L. G., Lucchetta S. A., Lupo M. W., Lysytsia L., Lysytsia O., Machnik K. A., Mainland J. A., Matczak K. E., Matysiak M. J., Mayeur P., Minervina A. A., Mishkova V., Mizia-Malarz A. J., Morales La Madrid A., Moreno L., Moskvin V. P., Muszynska-Roslan K. M., Nelson A. J., Ociepa T., Oltolini S., Onipko N., Pappas A., Patel A. B., Patrahau A., Pauley J. L., Pavlenko Y., Pavlovych A., Peregud-Pogorzelski J., Perek-Polnik M., Perez V., Perez-Martinez A., Pikman Y., Pitozzi G., Portugal R. G., Posternak V. V., Prete A., Pritchard-Jones K., Radaelli A., Reeves T., Reinhardt D., Reshetnyak A. V., Rider A. J., Rizzari C., Rizzi D., Rodriguez Hermosillo K. G., Ronenko O., Rostowska A. O., Rudko L., Sakaan F. M., Sakhar N., Savva N. N., Scaccaglia D., Schaeffer E. H., Schneider C. U., Scobie N., Semeniuk O., Shevchyk R., Shuler A. I., Shvets S., Skoczen S. P., Smeal W. J., Sokolowski I., Sonkin A. A., Stepanjuk A. I., Spota A., Sterba J., Styczynski J., Svintsova O., Synyuta A. V., Szczepanski T., Szczucinski P. K., Szmyd B. M., Tasso Cereceda M., Teliuk A., Tomanek I., Topping P., Torrent M., Trelinska J., Troyanovska O., Trubnikova E., Tsurkan L. G., Tsymbalyuk-Voloshyn I., Urasinski T. F., Urbanek-Dadela A., Vasilieva N., Vasilyeva A., Verdu-Amoros J., Vilcu-Bajurean N., Vinitsky L., Volpe G., Vorobel O., Wachowiak J. T., Wasiak M. S., Wiedower L. A., Wuenschel L. I., Wysocki M. S., Yurieva M., Zagurska A., Zakharenko S. S., Zakharenko A. V., Zapotochna K., Zawitkowska J. E., Agulnik, A, Kizyma, R, Salek, M, Wlodarski, M, Pogorelyy, M, Oszer, A, Yakimkova, T, Nogovitsyna, Y, Dutkiewicz, M, Dalle, J, Dirksen, U, Eggert, A, Fernandez-Teijeiro, A, Greiner, J, Kraal, K, Mueller, A, Sramkova, L, Zecca, M, Wise, P, Mlynarski, W, Avula, M, Adyrov, M, Berlanga, P, Blackwood, C, Bouffet, E, Czauderna, P, de Koning, L, dos Reis Farinha, N, Foster, W, Graetz, D, Gupta, S, Holter, W, Hough, R, Kliuchkivska, K, Kolenova, A, Kolodrubiec, J, Moreira, D, Mukkada, S, Mykychak, I, Raciborska, A, Salman, Z, Sopilnyak, A, Tyupa, S, Vinitsky, A, Wobst, N, Miller, B, Rasul, S, Rodriguez-Galindo, C, Alanbousi, I, Alexander, S, Apel, A, Bal, W, Balwierz, W, Basset-Salom, L, Bastardo Blanco, D, Bauer, K, Bayazitov, I, Bhakta, N, Bien, E, Bieniek, K, Blair, S, Bodak, K, Bordeianu, I, Braganca, J, Bucurenci, M, Budny, E, Budzyn, A, Bumgardner, C, Burditt, R, Burnside Clapp, V, Bykov, V, Canete, A, Carnelli, M, Cela, E, Cepowska, Z, Chaber, R, Cherner-Drieux, A, Chubata, M, Clough, H, Czernicka - Siwecka, J, Czyzewski, K, Dashchakovska, O, Dembowska-Baginska, B, Derwich, K, Dommett, R, Dorosh, O, Drabko, K, Dragomir, M, Dworzak, M, Dyma, S, Earl, J, English, M, Evseev, D, Farren, B, Fedyk, N, Ferneza, S, Fox Irwin, L, Galazkowski, R, Ganieva, G, Garanzha, V, Gelman, M, Godzinski, J, Goeres, A, Golban, R, Griksaitis, M, Hampel, M, Hastings, S, Heenen, D, Hill, M, Holiuk, I, Hutnik, L, Irga-Jaworska, N, Istomin, O, Janczar, S, Kacharian, A, Kalwak, K, Karolczyk, G, Karpenko, N, Katsubo, H, Kaznowska, B, Kentsis, A, Ketteler, P, Kienesberger, A, Kiselev, R, Kizyma, Z, Klymniuk, H, Kostiuk, Y, Kowalik, T, Kozlova, O, Kozubenko, V, Kramar, T, Krawczuk-Rybak, M, Kulemzina, I, Kurkowska, P, Kuzyk, A, Ladenstein, R, Laguna, P, Lassaletta, A, Lehmberg, K, Leontieva, O, Liashenko, S, Loizou, L, Lucchetta, S, Lupo, M, Lysytsia, L, Lysytsia, O, Machnik, K, Mainland, J, Matczak, K, Matysiak, M, Mayeur, P, Minervina, A, Mishkova, V, Mizia-Malarz, A, Morales La Madrid, A, Moreno, L, Moskvin, V, Muszynska-Roslan, K, Nelson, A, Ociepa, T, Oltolini, S, Onipko, N, Pappas, A, Patel, A, Patrahau, A, Pauley, J, Pavlenko, Y, Pavlovych, A, Peregud-Pogorzelski, J, Perek-Polnik, M, Perez, V, Perez-Martinez, A, Pikman, Y, Pitozzi, G, Portugal, R, Posternak, V, Prete, A, Pritchard-Jones, K, Radaelli, A, Reeves, T, Reinhardt, D, Reshetnyak, A, Rider, A, Rizzari, C, Rizzi, D, Rodriguez Hermosillo, K, Ronenko, O, Rostowska, A, Rudko, L, Sakaan, F, Sakhar, N, Savva, N, Scaccaglia, D, Schaeffer, E, Schneider, C, Scobie, N, Semeniuk, O, Shevchyk, R, Shuler, A, Shvets, S, Skoczen, S, Smeal, W, Sokolowski, I, Sonkin, A, Stepanjuk, A, Spota, A, Sterba, J, Styczynski, J, Svintsova, O, Synyuta, A, Szczepanski, T, Szczucinski, P, Szmyd, B, Tasso Cereceda, M, Teliuk, A, Tomanek, I, Topping, P, Torrent, M, Trelinska, J, Troyanovska, O, Trubnikova, E, Tsurkan, L, Tsymbalyuk-Voloshyn, I, Urasinski, T, Urbanek-Dadela, A, Vasilieva, N, Vasilyeva, A, Verdu-Amoros, J, Vilcu-Bajurean, N, Vinitsky, L, Volpe, G, Vorobel, O, Wachowiak, J, Wasiak, M, Wiedower, L, Wuenschel, L, Wysocki, M, Yurieva, M, Zagurska, A, Zakharenko, S, Zakharenko, A, Zapotochna, K, Zawitkowska, J, Agulnik A., Kizyma R., Salek M., Wlodarski M. W., Pogorelyy M., Oszer A., Yakimkova T., Nogovitsyna Y., Dutkiewicz M., Dalle J. -H., Dirksen U., Eggert A., Fernandez-Teijeiro A., Greiner J., Kraal K., Mueller A., Sramkova L., Zecca M., Wise P. H., Mlynarski W., Avula M., Adyrov M. V., Berlanga P., Blackwood C. A., Bouffet E., Czauderna P. S., de Koning L. A., dos Reis Farinha N. J., Foster W. B., Graetz D. E., Gupta S., Holter W., Hough R. E., Kliuchkivska K., Kolenova A., Kolodrubiec J., Moreira D. C., Mukkada S. T., Mykychak I., Raciborska A., Salman Z. S., Sopilnyak A., Tyupa S., Vinitsky A., Wobst N. M., Miller B. A., Rasul S. S., Rodriguez-Galindo C., Alanbousi I., Alexander S. W., Apel A., Bal W. A., Balwierz W. A., Basset-Salom L., Bastardo Blanco D., Bauer K. J., Bayazitov I. T., Bhakta N. H., Bien E. I., Bieniek K. A., Blair S. J., Bodak K. I., Bordeianu I. M., Braganca J. M., Bucurenci M. S., Budny E. B., Budzyn A., Bumgardner C. C., Burditt R. N., Burnside Clapp V. G., Bykov V., Canete A., Carnelli M., Cela E., Cepowska Z. P., Chaber R., Cherner-Drieux A., Chubata M., Clough H. M., Czernicka - Siwecka J., Czyzewski K., Dashchakovska O., Dembowska-Baginska B. M., Derwich K., Dommett R., Dorosh O., Drabko K. A., Dragomir M. D., Dworzak M., Dyma S., Earl J. D., English M. W., Evseev D. A., Farren B. S., Fedyk N., Ferneza S., Fox Irwin L. E., Galazkowski R. M., Ganieva G., Garanzha V., Gelman M. S., Godzinski J. K., Goeres A. F., Golban R., Griksaitis M. J., Hampel M. A., Hastings S. G., Heenen D. L., Hill M. C., Holiuk I., Hutnik L. M., Irga-Jaworska N., Istomin O., Janczar S. L., Kacharian A., Kalwak K., Karolczyk G. M., Karpenko N. M., Katsubo H., Kaznowska B. J., Kentsis A., Ketteler P., Kienesberger A., Kiselev R., Kizyma Z., Klymniuk H., Kostiuk Y., Kowalik T., Kozlova O., Kozubenko V., Kramar T., Krawczuk-Rybak M., Kulemzina I., Kurkowska P., Kuzyk A. S., Ladenstein R. L., Laguna P. J., Lassaletta A., Lehmberg K., Leontieva O., Liashenko S., Loizou L. G., Lucchetta S. A., Lupo M. W., Lysytsia L., Lysytsia O., Machnik K. A., Mainland J. A., Matczak K. E., Matysiak M. J., Mayeur P., Minervina A. A., Mishkova V., Mizia-Malarz A. J., Morales La Madrid A., Moreno L., Moskvin V. P., Muszynska-Roslan K. M., Nelson A. J., Ociepa T., Oltolini S., Onipko N., Pappas A., Patel A. B., Patrahau A., Pauley J. L., Pavlenko Y., Pavlovych A., Peregud-Pogorzelski J., Perek-Polnik M., Perez V., Perez-Martinez A., Pikman Y., Pitozzi G., Portugal R. G., Posternak V. V., Prete A., Pritchard-Jones K., Radaelli A., Reeves T., Reinhardt D., Reshetnyak A. V., Rider A. J., Rizzari C., Rizzi D., Rodriguez Hermosillo K. G., Ronenko O., Rostowska A. O., Rudko L., Sakaan F. M., Sakhar N., Savva N. N., Scaccaglia D., Schaeffer E. H., Schneider C. U., Scobie N., Semeniuk O., Shevchyk R., Shuler A. I., Shvets S., Skoczen S. P., Smeal W. J., Sokolowski I., Sonkin A. A., Stepanjuk A. I., Spota A., Sterba J., Styczynski J., Svintsova O., Synyuta A. V., Szczepanski T., Szczucinski P. K., Szmyd B. M., Tasso Cereceda M., Teliuk A., Tomanek I., Topping P., Torrent M., Trelinska J., Troyanovska O., Trubnikova E., Tsurkan L. G., Tsymbalyuk-Voloshyn I., Urasinski T. F., Urbanek-Dadela A., Vasilieva N., Vasilyeva A., Verdu-Amoros J., Vilcu-Bajurean N., Vinitsky L., Volpe G., Vorobel O., Wachowiak J. T., Wasiak M. S., Wiedower L. A., Wuenschel L. I., Wysocki M. S., Yurieva M., Zagurska A., Zakharenko S. S., Zakharenko A. V., Zapotochna K., and Zawitkowska J. E.

Published
2022

6. The Global COVID-19 Observatory and Resource Center for Childhood Cancer: A response for the pediatric oncology community by SIOP and St. Jude Global

Author

Moreira, DC, Sniderman, E, Mukkada, S, Chantada, G, Bhakta, N, Foster, W, Avula, M, Homsi, MR, Faughan, L, Happ, B, Andujar, A, Sonnenfelt, J, Dalvi, R, Frazier, AL, Hessissen, L, Kearns, PR, Luna-Fineman, S, Moreno, A, Saghir Khan, M, Sullivan, M, Devidas, M, Santana, V, Caniza, M, Pritchard-Jones, K, Rodriguez-Galindo, C, Moreira, DC, Sniderman, E, Mukkada, S, Chantada, G, Bhakta, N, Foster, W, Avula, M, Homsi, MR, Faughan, L, Happ, B, Andujar, A, Sonnenfelt, J, Dalvi, R, Frazier, AL, Hessissen, L, Kearns, PR, Luna-Fineman, S, Moreno, A, Saghir Khan, M, Sullivan, M, Devidas, M, Santana, V, Caniza, M, Pritchard-Jones, K, and Rodriguez-Galindo, C

Abstract

The COVID-19 pandemic quickly led to an abundance of publications and recommendations, despite a paucity of information on how COVID-19 affects children with cancer. This created a dire need for a trusted resource with curated information and a space for the pediatric oncology community to share experiences. The Global COVID-19 Observatory and Resource Center for Childhood Cancer was developed, launched, and maintained by the International Society of Pediatric Oncology and St. Jude Children's Research Hospital. The three components (Resource Library, Global Registry, and Collaboration Space) complement each other, establishing a mechanism to generate and transfer knowledge rapidly throughout the community.

Published
2021

7. COVD-04. CHARACTERISTICS OF SARS-COV-2 IN 64 CHILDREN WITH CNS TUMORS: A REPORT FROM THE SIOP/ST. JUDE CHILDREN’S RESEARCH HOSPITAL (SJCRH) GLOBAL COVID-19 CHILDHOOD CANCER REGISTRY

Author

Moreira, D, Bouffet, E, Bhakta, N, Chantada, G, Chen, Y, Faughnan, L, Vedaraju, Y, Avula, M, Homsi, M, Naidu, P, Pappas, A, Ranadive, R, Santana, V, Sullivan, M, Baroni, L, Caniza, M, Devidas, M, Pritchard-Jones, K, Rodriguez-Galindo, C, Mukkada, S, Moreira, D, Bouffet, E, Bhakta, N, Chantada, G, Chen, Y, Faughnan, L, Vedaraju, Y, Avula, M, Homsi, M, Naidu, P, Pappas, A, Ranadive, R, Santana, V, Sullivan, M, Baroni, L, Caniza, M, Devidas, M, Pritchard-Jones, K, Rodriguez-Galindo, C, and Mukkada, S

Abstract

BACKGROUND The GCCCR is a collaboration between SIOP and SJCRH to describe the natural history of SARS-CoV-2 in children with cancer across the world. METHODS The GCCCR is a deidentified registry of patients <19 years of age with cancer or recipients of a hematopoietic stem cell transplant and laboratory-confirmed SARS-CoV-2 infection. Demographic data, cancer diagnosis, cancer-directed therapy, and clinical characteristics of SARS-CoV-2 infection were collected. Outcomes were collected at 30-days and 60-days post infection. RESULTS As of August 10th 2020, the GCCCR included 730 cases from 35 countries, including 64 children with CNS tumors (8.8%) from 17 countries. The most frequent diagnoses were embryonal tumors (31.2%) and low-grade glioma (17.2%). Thirty-nine (60.9%) children were asymptomatic from infection, while 19 (29.7%) patients required hospital admission and 2 (6.3%) transferred to the intensive care unit. There was a significant association between infection severity and ANC <500 (p=0.04). At the time of infection, 44 (68.8%) patients were undergoing cancer-directed therapy. Thirty-two cases have follow-up data. No modification in cancer-directed therapy occurred in 11 (34.4%) patients, while chemotherapy was modified in 6 (18.8%), radiotherapy delayed in 2 (6.3%), and surgery postponed in 1 (3.1%). No patients died from SARS-CoV-2 infection, although 2 died from non-COVID-19 related causes. CONCLUSION The frequency and severity of COVID infection among children with CNS tumors appears to be proportionally lower compared to other children with cancer. Although this is the largest cohort of patients reported to date, additional insight is needed, including the effects of treatment modifications on outcomes.

Published
2020

8. A Novel Dual Band Notched MIMO UWB Antenna.

Author

Devana, Venkata N. K. Rao and Rao, Avula M.

Subjects
ULTRA-wideband antennas, WIRELESS LANs, MICROSTRIP transmission lines, ANTENNAS (Electronics)
Abstract

A novel, miniature multiple input multiple output (MIMO) ultra wide band (UWB) antenna with dual notched characteristics is proposed. The antenna incorporates a tapered microstrip feed line with two radiating patch structures procured by the incorporation of two ellipses with a circle and a reduced ground structure. The proposed antenna is printed on an FR-4 substrate having a concise size of 40 × 22mm2 to cover -10 dB bandwidth of 3.18-11.26 GHz with fractional bandwidth of 112%. The two notched bands 3.31-3.99 GHz for WiMAX and 4.97-5.93 GHz for WLAN accomplished by two T-shaped parasitic structures are etched above ground plane and inverted U-shaped slots etched on radiating patch, respectively. The isolation of < -15 dB is realized by inserting a T-shaped stub in between two patch elements. The measured MIMO diversity characteristics are the evidence of that the proposed antenna is appropriate for portable wireless applications. [ABSTRACT FROM AUTHOR]

Published
2020
Full Text
View/download PDF

9. A Novel Compact Tri Band Notched UWB Monopole Antenna.

Author

Devana, Venkata N. K. R. and Rao, Avula M.

Subjects
MONOPOLE antennas, ULTRA-wideband antennas, ULTRA-wideband devices, COMPACTING, WIRELESS communications, ANTENNAS (Electronics)
Abstract

A novel compact (20x22mm²) triple band eliminated monopole antenna for ultra-wideband (UWB) applications is presented. A novel radiating patch with reduced ground plane is utilized for achieving a -10 dB impedance bandwidth of 3.28-13.28 GHz. An upper inverted U-shaped slot is introduced into the radiating patch to notch C-band (3.68-4.19 GHz), and a lower inverted U-structured slot is utilized to eliminate WLAN band (5.18-5.82 GHz) interference. The interference due to down link of X-band (7.27-7.87 GHz) is rejected by via hole connected between patch and rectangular strip printed above the defected ground structure. The proposed antenna has nearly stable radiation patterns, and realized gain over UWB frequency range makes it suitable for recent portable wireless communication applications. [ABSTRACT FROM AUTHOR]

Published
2020
Full Text
View/download PDF

10. Characteristic Mode Analysis of Wideband Microstrip Antenna.

Author

Perli, Bhaskara Rao and Rao, Avula M.

Subjects
MICROSTRIP antennas, MICROSTRIP transmission lines, ANTENNA design, ANTENNAS (Electronics), BANDWIDTHS, LONG-Term Evolution (Telecommunications)
Abstract

In this paper, a wideband antenna is designed systematically based on characteristic mode analysis (CMA). The antenna consists of a rectangle, a semi-annular ring, and a microstrip line. The radiating behavior and resonant frequencies of the radiating element are analyzed by using first four characteristic modes. First two modes only have wideband behavior and are excited by CPW feeding technique. The proposed antenna is printed on a low cost FR4 substrate with a size of 35×50×1.6mm3 and impedance bandwidth ranging from 1.6 to 3.8GHz for the applications of GSM, DCS, LTE, and WIMAX. To validate the proposed approach, the wideband antenna is fabricated and tested. A wide impedance bandwidth of 81% with |S11| < -10 dB is achieved for both simulation and measurement results. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

11. Design and Parametric Analysis of Beveled UWB Triple Band Rejection Antenna.

Author

Rao Devana, Venkata N. K. and Rao, Avula M.

Subjects
ANTENNA design, ULTRA-wideband antennas, ANTENNAS (Electronics), RESONATORS, DESIGN, ULTRA-wideband devices
Abstract

A novel beveled triple band rejection UWB monopole radiator is presented. The reference UWB antenna incorporate a beveled radiator and partial ground structure for achieving UWB bandwidth from 2.73 to 11.05 GHz. For rejecting 3.78-4.36, 5.15-5.45, and 7.2-7.9GHz for C, lower WLAN, and X-band applications, the reference UWB element is freighted with an inverted U-shaped slot etched into a radiating patch. A symmetrical split ring resonator pair (SSRRP) is proximate to microstrip feed, and a C-shaped parasitic stub is embedded on top of defected ground plane. The antenna is designed on an FR-4 substrate with 30 × 32.5mm² size, having a realized average gain of 3.72 dBi and is nearly stable across the entire UWB excluding at three rejected bands. [ABSTRACT FROM AUTHOR]

Published
2019

13. Implantable Biosensor Arrays Based On Smart Hydrogels And Piezoresistive Sensors For Continuous Metabolic Monitoring.

Author

Avula, M., Tathireddy, P., Cho, S., Rieth, L., Magda, J.J., and Solzbacher, F.

Abstract

Abstract: In this paper, we present the results of continuous monitoring metabolic sensor arrays capable of monitoring changes in glucose, ionic strength and pH in the surrounding analyte continuously. Piezoresistive pressure sensors containing KOH etched cavities and pressure sensing membranes with and without perforations were fabricated in different sizes (1.5×1.5 mm2, 1.25×1.25 mm2, 1×1 mm2 and 0.5×0.5 mm2) to account for the sensitivities of the different types of hydrogels that were investigated. Figure 1 shows the schematic and the image of the sensors. Stimuli responsive hydrogels were used as the sensing elements to detect glucose and ionic strength in phosphate buffered saline at pH 7.4 and at room temperature. Response times of ∼10 and ∼6minutes during swelling cycle and ∼5 and ∼4minutes for the shrinking cycle were measured for glucose and ionic strength responsive hydrogels respectively. [Copyright &y& Elsevier]

Published
2012
Full Text
View/download PDF

15. Global effort to evacuate Ukrainian children with cancer and blood disorders who have been affected by war

Author

Asya Agulnik, Roman Kizyma, Marta Salek, Marcin W Wlodarski, Mikhail Pogorelyy, Aleksandra Oszer, Taisiya Yakimkova, Yuliya Nogovitsyna, Malgorzata Dutkiewicz, Jean-Hugues Dalle, Uta Dirksen, Angelika Eggert, Ana Fernández-Teijeiro, Jeanette Greiner, Kathelijne Kraal, Alexandra Mueller, Lucie Sramkova, Marco Zecca, Paul H Wise, Wojciech Mlynarski, Meghana Avula, Mykhaylo V Adyrov, Pablo Berlanga, Christopher Andrew Blackwood, Eric Bouffet, Piotr Stefan Czauderna, Linda A de Koning, Nuno Jorge dos Reis Farinha, Whitney Baer Foster, Dylan Elizabeth Graetz, Sumit Gupta, Wolfgang Holter, Rachael Emma Hough, Khrystyna Kliuchkivska, Alexandra Kolenova, Julia Kołodrubiec, Daniel C Moreira, Sheena Teresa Mukkada, Iryna Mykychak, Anna Raciborska, Zeena S Salman, Andriy Sopilnyak, Sergiy Tyupa, Anna Vinitsky, Natalia Margarete Wobst, Beth Anne Miller, Suheir Subhi Rasul, Carlos Rodriguez-Galindo, Inna Alanbousi, Sarah Weeks Alexander, Anna Apel, Wioletta Anna Bal, Walentyna Aniela Balwierz, Luisa Basset-Salom, Daniel Bastardo Blanco, Karolina Jadwiga Bauer, Ildar T Bayazitov, Nickhill Hitesh Bhakta, Ewa Iwona Bien, Katarzyna Anna Bieniek, Sally Jane Blair, Khrystyna Ihorivna Bodak, Irina Michael Bordeianu, Joao Maria Braganca, Mihaela Silvia Bucurenci, Elżbieta Beata Budny, Andrii Budzyn, Christopher Carl Bumgardner, Raina Nichole Burditt, Victoria Grace Burnside Clapp, Viacheslav Bykov, Adela Cañete, Monica Carnelli, Elena Cela, Zuzanna Paulina Cepowska, Radoslaw Chaber, Anna Cherner-Drieux, Mariya Chubata, Heidi M Clough, Jolanta Czernicka - Siwecka, Krzysztof Czyzewski, Olha Dashchakovska, Bozenna Malgorzata Dembowska-Baginska, Katarzyna Derwich, Rachel Dommett, Olha Dorosh, Katarzyna Anna Drabko, Monica Desiree Dragomir, Michael Dworzak, Sergii Dyma, Julian Darocus Earl, Martin William English, Dmitry A Evseev, Becky S Farren, Nataliia Fedyk, Severyn Ferneza, Leeanna Elizabeth Fox Irwin, Robert Maciej Gałązkowski, Galyna Ganieva, Vasylyna Garanzha, Marina S Gelman, Jan Krzysztof Godzinski, Anne Francoise Goeres, Rodica Golban, Michael J Griksaitis, Michal Andrzej Hampel, Sara Grace Hastings, Delphine Liliane Heenen, Marcela C Hill, Igor Holiuk, Lukasz Marek Hutnik, Ninela Irga-Jaworska, Oleksandr Istomin, Szymon Lech Janczar, Arman Kacharian, Krzysztof Kalwak, Grażyna Malgorzata Karolczyk, Nataliia Mikolaivna Karpenko, Halyna Katsubo, Bernarda Jadwiga Kaznowska, Alex Kentsis, Petra Ketteler, Anita Kienesberger, Roman Kiselev, Zoryana Kizyma, Hryhorii Klymniuk, Yuliia Kostiuk, Tomasz Kowalik, Olena Kozlova, Vladyslav Kozubenko, Tetyana Kramar, Maryna Krawczuk-Rybak, Irina Kulemzina, Paulina Kurkowska, Andriy S Kuzyk, Ruth Lydia Ladenstein, Pawel Jozef Laguna, Alvaro Lassaletta, Kai Lehmberg, Oksana Leontieva, Serhii Liashenko, Loizos G Loizou, Sonia Anna Lucchetta, Matthew William Lupo, Lesya Lysytsia, Oleksandr Lysytsia, Katarzyna Anna Machnik, Jeff A Mainland, Katarzyna Ewa Matczak, Michal Jacek Matysiak, Pierre Mayeur, Anastasia A Minervina, Volha Mishkova, Agnieszka Joanna Mizia-Malarz, Andres Morales La Madrid, Lucas Moreno, Vadim P Moskvin, Katarzyna Maria Muszyńska-Rosłan, Akoya Janae Nelson, Tomasz Ociepa, Stefano Oltolini, Nataliia Onipko, Andrew Pappas, Amit B Patel, Alina Patrahau, Jennifer L Pauley, Yehor Pavlenko, Andrij Pavlovych, Jarosław Peregud-Pogorzelski, Marta Perek-Polnik, Vanesa Perez, Antonio Perez-Martinez, Yana Pikman, Graziano Pitozzi, Rui Gentil Portugal, Victoria Vita Posternak, Arcangelo Prete, Kathy Pritchard-Jones, Alessandra Radaelli, Tegan Reeves, Dirk Reinhardt, Andrey V Reshetnyak, Andrew Jacob Rider, Carmelo Rizzari, Damiano Rizzi, Karen Gabriela Rodriguez Hermosillo, Olena Ronenko, Aneta Olga Rostowska, Liudmyla Rudko, Firas Mohamed Sakaan, Nadezhda Sakhar, Natallia N Savva, Davide Scaccaglia, Elizabeth Hawthorne Schaeffer, Carina Ursula Schneider, Nicole Scobie, Olena Semeniuk, Roksoliana Shevchyk, Ana I Shuler, Stanislav Shvets, Szymon Pawel Skoczen, William John Smeal, Igor Sokolowski, Anna A Sonkin, Alla Ivanivna Stepanjuk, Andrea Spota, Jaroslav Sterba, Jan Styczynski, Olha Svintsova, Andriy V Synyuta, Tomasz Szczepanski, Paweł Kukiz Szczucinski, Bartosz Miroslaw Szmyd, Maria Tasso Cereceda, Alina Teliuk, Iwona Tomanek, Phoebe Topping, Montserrat Torrent, Joanna Trelińska, Olha Troyanovska, Elena Trubnikova, Lyudmila G Tsurkan, Iryna Tsymbalyuk-Voloshyn, Tomasz Franciszek Urasinski, Agnieszka Urbanek-Dadela, Nataliia Vasilieva, Aksana Vasilyeva, Jaime Verdú-Amorós, Natalia Vilcu-Bajurean, Leo Vinitsky, Giovanni Volpe, Oksana Vorobel, Jacek Tadeusz Wachowiak, Marcin Slawomir Wasiak, Lance Allan Wiedower, Lena Isolde Wuenschel, Mariusz Stanislaw Wysocki, Marina Yurieva, Anastasiia Zagurska, Stanislav S Zakharenko, Aelita V Zakharenko, Khrystyna Zapotochna, Joanna Emilia Zawitkowska, Agulnik, A, Kizyma, R, Salek, M, Wlodarski, M, Pogorelyy, M, Oszer, A, Yakimkova, T, Nogovitsyna, Y, Dutkiewicz, M, Dalle, J, Dirksen, U, Eggert, A, Fernandez-Teijeiro, A, Greiner, J, Kraal, K, Mueller, A, Sramkova, L, Zecca, M, Wise, P, Mlynarski, W, Avula, M, Adyrov, M, Berlanga, P, Blackwood, C, Bouffet, E, Czauderna, P, de Koning, L, dos Reis Farinha, N, Foster, W, Graetz, D, Gupta, S, Holter, W, Hough, R, Kliuchkivska, K, Kolenova, A, Kolodrubiec, J, Moreira, D, Mukkada, S, Mykychak, I, Raciborska, A, Salman, Z, Sopilnyak, A, Tyupa, S, Vinitsky, A, Wobst, N, Miller, B, Rasul, S, Rodriguez-Galindo, C, Alanbousi, I, Alexander, S, Apel, A, Bal, W, Balwierz, W, Basset-Salom, L, Bastardo Blanco, D, Bauer, K, Bayazitov, I, Bhakta, N, Bien, E, Bieniek, K, Blair, S, Bodak, K, Bordeianu, I, Braganca, J, Bucurenci, M, Budny, E, Budzyn, A, Bumgardner, C, Burditt, R, Burnside Clapp, V, Bykov, V, Canete, A, Carnelli, M, Cela, E, Cepowska, Z, Chaber, R, Cherner-Drieux, A, Chubata, M, Clough, H, Czernicka - Siwecka, J, Czyzewski, K, Dashchakovska, O, Dembowska-Baginska, B, Derwich, K, Dommett, R, Dorosh, O, Drabko, K, Dragomir, M, Dworzak, M, Dyma, S, Earl, J, English, M, Evseev, D, Farren, B, Fedyk, N, Ferneza, S, Fox Irwin, L, Galazkowski, R, Ganieva, G, Garanzha, V, Gelman, M, Godzinski, J, Goeres, A, Golban, R, Griksaitis, M, Hampel, M, Hastings, S, Heenen, D, Hill, M, Holiuk, I, Hutnik, L, Irga-Jaworska, N, Istomin, O, Janczar, S, Kacharian, A, Kalwak, K, Karolczyk, G, Karpenko, N, Katsubo, H, Kaznowska, B, Kentsis, A, Ketteler, P, Kienesberger, A, Kiselev, R, Kizyma, Z, Klymniuk, H, Kostiuk, Y, Kowalik, T, Kozlova, O, Kozubenko, V, Kramar, T, Krawczuk-Rybak, M, Kulemzina, I, Kurkowska, P, Kuzyk, A, Ladenstein, R, Laguna, P, Lassaletta, A, Lehmberg, K, Leontieva, O, Liashenko, S, Loizou, L, Lucchetta, S, Lupo, M, Lysytsia, L, Lysytsia, O, Machnik, K, Mainland, J, Matczak, K, Matysiak, M, Mayeur, P, Minervina, A, Mishkova, V, Mizia-Malarz, A, Morales La Madrid, A, Moreno, L, Moskvin, V, Muszynska-Roslan, K, Nelson, A, Ociepa, T, Oltolini, S, Onipko, N, Pappas, A, Patel, A, Patrahau, A, Pauley, J, Pavlenko, Y, Pavlovych, A, Peregud-Pogorzelski, J, Perek-Polnik, M, Perez, V, Perez-Martinez, A, Pikman, Y, Pitozzi, G, Portugal, R, Posternak, V, Prete, A, Pritchard-Jones, K, Radaelli, A, Reeves, T, Reinhardt, D, Reshetnyak, A, Rider, A, Rizzari, C, Rizzi, D, Rodriguez Hermosillo, K, Ronenko, O, Rostowska, A, Rudko, L, Sakaan, F, Sakhar, N, Savva, N, Scaccaglia, D, Schaeffer, E, Schneider, C, Scobie, N, Semeniuk, O, Shevchyk, R, Shuler, A, Shvets, S, Skoczen, S, Smeal, W, Sokolowski, I, Sonkin, A, Stepanjuk, A, Spota, A, Sterba, J, Styczynski, J, Svintsova, O, Synyuta, A, Szczepanski, T, Szczucinski, P, Szmyd, B, Tasso Cereceda, M, Teliuk, A, Tomanek, I, Topping, P, Torrent, M, Trelinska, J, Troyanovska, O, Trubnikova, E, Tsurkan, L, Tsymbalyuk-Voloshyn, I, Urasinski, T, Urbanek-Dadela, A, Vasilieva, N, Vasilyeva, A, Verdu-Amoros, J, Vilcu-Bajurean, N, Vinitsky, L, Volpe, G, Vorobel, O, Wachowiak, J, Wasiak, M, Wiedower, L, Wuenschel, L, Wysocki, M, Yurieva, M, Zagurska, A, Zakharenko, S, Zakharenko, A, Zapotochna, K, and Zawitkowska, J

Subjects
Neoplasms, Medizin, Ethnicity, cancer, Humans, war, MED/38 - PEDIATRIA GENERALE E SPECIALISTICA, Hematology, Child, Hematologic Diseases, blood disorder
Published
2022
Full Text
View/download PDF

16. The transformation of Cure4Kids: Expanding knowledge transfer capacity.

Author

Berg F, Conger K, Avula M, Hansen C, Chatman G, Provasnik J, Alguire K, Wellman A, Chantada G, Rodriguez-Galindo C, and Moreira DC

Subjects
Humans, Medical Oncology education, Child, Internet, Health Personnel education, Hematology education, Pediatrics, Neoplasms therapy
Abstract

Global survival disparities among children with cancer and other catastrophic diseases are the driving force behind Cure4Kids' sustained outreach to healthcare professionals. Congruent with this need, Cure4Kids was redesigned to meet the emergent demands of diverse healthcare professionals seeking free, web-based pediatric hematology/oncology education. Herein, we present an overview of each phase of the design and development process for the transformation and describe key features of the new Cure4Kids and future opportunities for expansion., (© 2024 The Authors. Pediatric Blood & Cancer published by Wiley Periodicals LLC.)

Published
2024
Full Text
View/download PDF

17. Longitudinal linked-read sequencing reveals ecological and evolutionary responses of a human gut microbiome during antibiotic treatment.

Author

Roodgar M, Good BH, Garud NR, Martis S, Avula M, Zhou W, Lancaster SM, Lee H, Babveyh A, Nesamoney S, Pollard KS, and Snyder MP

Subjects
Anti-Bacterial Agents pharmacology, Anti-Bacterial Agents therapeutic use, Humans, Metagenome, Metagenomics methods, Gastrointestinal Microbiome genetics, Microbiota genetics
Abstract

Gut microbial communities can respond to antibiotic perturbations by rapidly altering their taxonomic and functional composition. However, little is known about the strain-level processes that drive this collective response. Here, we characterize the gut microbiome of a single individual at high temporal and genetic resolution through a period of health, disease, antibiotic treatment, and recovery. We used deep, linked-read metagenomic sequencing to track the longitudinal trajectories of thousands of single nucleotide variants within 36 species, which allowed us to contrast these genetic dynamics with the ecological fluctuations at the species level. We found that antibiotics can drive rapid shifts in the genetic composition of individual species, often involving incomplete genome-wide sweeps of pre-existing variants. These genetic changes were frequently observed in species without obvious changes in species abundance, emphasizing the importance of monitoring diversity below the species level. We also found that many sweeping variants quickly reverted to their baseline levels once antibiotic treatment had concluded, demonstrating that the ecological resilience of the microbiota can sometimes extend all the way down to the genetic level. Our results provide new insights into the population genetic forces that shape individual microbiomes on therapeutically relevant timescales, with potential implications for personalized health and disease., (© 2021 Roodgar et al.; Published by Cold Spring Harbor Laboratory Press.)

Published
2021
Full Text
View/download PDF

18. The Global COVID-19 Observatory and Resource Center for Childhood Cancer: A response for the pediatric oncology community by SIOP and St. Jude Global.

Author

Moreira DC, Sniderman E, Mukkada S, Chantada G, Bhakta N, Foster W, Avula M, Homsi MR, Faughnan L, Happ B, Andujar A, Sonnenfelt J, Dalvi R, Frazier AL, Hessissen L, Kearns PR, Luna-Fineman S, Moreno A, Saghir Khan M, Sullivan M, Devidas M, Santana V, Caniza M, Pritchard-Jones K, and Rodriguez-Galindo C

Subjects
Child, Comorbidity, Health Resources, Humans, Registries, SARS-CoV-2, COVID-19 pathology, Information Dissemination methods, Libraries, Medical, Neoplasms pathology
Abstract

The COVID-19 pandemic quickly led to an abundance of publications and recommendations, despite a paucity of information on how COVID-19 affects children with cancer. This created a dire need for a trusted resource with curated information and a space for the pediatric oncology community to share experiences. The Global COVID-19 Observatory and Resource Center for Childhood Cancer was developed, launched, and maintained by the International Society of Pediatric Oncology and St. Jude Children's Research Hospital. The three components (Resource Library, Global Registry, and Collaboration Space) complement each other, establishing a mechanism to generate and transfer knowledge rapidly throughout the community., (© 2021 Wiley Periodicals LLC.)

Published
2021
Full Text
View/download PDF

19. Chromosome-level de novo assembly of the pig-tailed macaque genome using linked-read sequencing and HiC proximity scaffolding.

Author

Roodgar M, Babveyh A, Nguyen LH, Zhou W, Sinha R, Lee H, Hanks JB, Avula M, Jiang L, Jian R, Lee H, Song G, Chaib H, Weissman IL, Batzoglou S, Holmes S, Smith DG, Mankowski JL, Prost S, and Snyder MP

Subjects
Animals, Computational Biology methods, Humans, Karyotyping methods, Male, Molecular Sequence Annotation, Proteomics methods, Repetitive Sequences, Nucleic Acid, Chromosomes, Genome, Genomics methods, Macaca nemestrina genetics
Abstract

Background: Macaque species share >93% genome homology with humans and develop many disease phenotypes similar to those of humans, making them valuable animal models for the study of human diseases (e.g., HIV and neurodegenerative diseases). However, the quality of genome assembly and annotation for several macaque species lags behind the human genome effort., Results: To close this gap and enhance functional genomics approaches, we used a combination of de novo linked-read assembly and scaffolding using proximity ligation assay (HiC) to assemble the pig-tailed macaque (Macaca nemestrina) genome. This combinatorial method yielded large scaffolds at chromosome level with a scaffold N50 of 127.5 Mb; the 23 largest scaffolds covered 90% of the entire genome. This assembly revealed large-scale rearrangements between pig-tailed macaque chromosomes 7, 12, and 13 and human chromosomes 2, 14, and 15. We subsequently annotated the genome using transcriptome and proteomics data from personalized induced pluripotent stem cells derived from the same animal. Reconstruction of the evolutionary tree using whole-genome annotation and orthologous comparisons among 3 macaque species, human, and mouse genomes revealed extensive homology between human and pig-tailed macaques with regards to both pluripotent stem cell genes and innate immune gene pathways. Our results confirm that rhesus and cynomolgus macaques exhibit a closer evolutionary distance to each other than either species exhibits to humans or pig-tailed macaques., Conclusions: These findings demonstrate that pig-tailed macaques can serve as an excellent animal model for the study of many human diseases particularly with regards to pluripotency and innate immune pathways., (© The Author(s) 2020. Published by Oxford University Press.)

Published
2020
Full Text
View/download PDF

20. Foreign body response to subcutaneous biomaterial implants in a mast cell-deficient Kit(w-Sh) murine model.

Author

Avula MN, Rao AN, McGill LD, Grainger DW, and Solzbacher F

Subjects
Animals, Cell Count, Disease Models, Animal, Fibrosis, Foreign Bodies immunology, Foreign Bodies pathology, Foreign-Body Reaction pathology, Inflammation pathology, Lactic Acid chemistry, Male, Mice, Mice, Inbred C57BL, Polyethylene Glycols chemistry, Polyglycolic Acid chemistry, Polylactic Acid-Polyglycolic Acid Copolymer, Proto-Oncogene Proteins c-kit metabolism, Subcutaneous Tissue pathology, Biocompatible Materials adverse effects, Foreign-Body Reaction immunology, Implants, Experimental adverse effects, Mast Cells pathology, Subcutaneous Tissue immunology
Abstract

Mast cells (MCs)&#95;are recognized for their functional role in wound-healing and allergic and inflammatory responses - host responses that are frequently detrimental to implanted biomaterials if extended beyond acute reactivity. These tissue reactions impact especially on the performance of sensing implants such as continuous glucose monitoring (CGM) devices. Our hypothesis that effective blockade of MC activity around implants could alter the host foreign body response (FBR) and enhance the in vivo lifetime of these implantable devices motivated this study. Stem cell factor and its ligand c-KIT receptor are critically important for MC survival, differentiation and degranulation. Therefore, an MC-deficient sash mouse model was used to assess MC relationships to the in vivo performance of CGM implants. Additionally, local delivery of a tyrosine kinase inhibitor (TKI) that inhibits c-KIT activity was also used to evaluate the role of MCs in modulating the FBR. Model sensor implants comprising polyester fibers coated with a rapidly dissolving polymer coating containing drug-releasing degradable microspheres were implanted subcutaneously in sash mice for various time points, and the FBR was evaluated for chronic inflammation and fibrous capsule formation around the implants. No significant differences were observed in the foreign body capsule formation between control and drug-releasing implant groups in MC-deficient mice. However, fibrous encapsulation was significantly greater around the drug-releasing implants in sash mice compared to drug-releasing implants in wild-type (e.g. MC-competent) mice. These results provide insights into the role of MCs in the FBR, suggesting that MC deficiency provides alternative pathways for host inflammatory responses to implanted biomaterials., (Copyright © 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.)

Published
2014
Full Text
View/download PDF

21. Effect of temperature changes on the performance of ionic strength biosensors based on hydrogels and pressure sensors.

Author

Avula M, Busche N, Cho SH, Tathireddy P, Rieth LW, Magda JJ, and Solzbacher F

Subjects
Equipment Design, Equipment Failure Analysis, Reproducibility of Results, Sensitivity and Specificity, Temperature, Biosensing Techniques instrumentation, Hydrogels analysis, Hydrogels chemistry, Hydrogen-Ion Concentration, Ions analysis, Manometry instrumentation, Micro-Electrical-Mechanical Systems instrumentation
Abstract

Stimuli responsive hydrogels show a strong ability to change in volume with changes in selected environmental properties. This tendency of these hydrogels to change in volume is captured as pressure-change in confined cavities of pressure sensors. An array of pressure sensors on a single chip may carry hydrogels sensitive to multiple, selected metabolic markers and continuously monitor multiple vital parameters simultaneously. Currently, such sensors are capable of continuously monitoring pH, ionic strength, glucose levels and temperature in the sensor environment. In this paper, we report the effect of temperature changes on the performance of ionic strength sensor. A formulation of hydrogel that renders it sensitive to changes in ionic strength was UV polymerized in situ in piezoresistive pressure sensors with different membrane sizes. The sensor sensitivity, response time and stability are investigated as a function of temperature in vitro. The effect of temperature on these sensor characteristics is discussed.

Published
2011
Full Text
View/download PDF

22. Smart hydrogel based microsensing platform for continuous glucose monitoring.

Author

Tathireddy P, Avula M, Lin G, Cho SH, Guenther M, Schulz V, Gerlach G, Magda JJ, and Solzbacher F

Subjects
Animals, Blood Glucose chemistry, Equipment Design, Equipment Failure Analysis, Mice, Miniaturization, Blood Glucose analysis, Hydrogels chemistry, Manometry instrumentation, Monitoring, Physiologic instrumentation, Transducers
Abstract

In this paper, we present preliminary results showing the response of glucose-sensitive hydrogels, confined in micro-pressure sensors, to the changes in environmental glucose concentration. The glucose concentrations were incrementally varied between 20 and 0mM in 0.15M PBS solution at 7.4 pH and bovine serum at 7.4 pH at room temperature and response of the sensor was recorded. The micro sensors demonstrate a response time of 10 minutes in both PBS and serum. Tissue response after 55 days of subcutaneous implantation of a EtO sterilized sensor in mice is presented. The preliminary analysis of the surrounding tissue shows inflammation which is believed not to interfere with the sensor performance.

Published
2010
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results