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Zarif F, Tabassum S, Jamal A, Gul U, Gilani MA, Sharif F, Zahid S, Asif A, Chaudhry AA, Rehman IU. Surface-grafted remedial hydroxyapatite nanoparticles to avoid operational infections. MONATSHEFTE FUR CHEMIE 2019. [DOI: 10.1007/s00706-018-2339-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Zahid S, Khan AS, Chaudhry AA, Ghafoor S, Ain QU, Raza A, Rahim MI, Goerke O, Rehman IU, Tufail A. Fabrication, in vitro and in vivo studies of bilayer composite membrane for periodontal guided tissue regeneration. J Biomater Appl 2018; 33:967-978. [PMID: 30509121 DOI: 10.1177/0885328218814986] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Development of a guided occlusive biodegradable membrane with controlled morphology in order to restrict the ingrowth of epithelial cells is still a challenge in dental tissue engineering. A bilayer membrane with a non-porous upper layer (polyurethane) and porous lower layer (polycaprolactone and bioactive glass composite) with thermoelastic properties to sustain surgery treatment was developed by lyophilization. Morphology, porosity, and layers attachment were controlled by using the multi-solvent system. In vitro and in vivo biocompatibility, cell attachment, and cell proliferation were analyzed by immunohistochemistry and histology. The cell proliferation rate and cell attachment results showed good biocompatibility of both surfaces, though cell metabolic activity was better on the polycaprolactone-bioactive glass surface. Furthermore, the cells were viable, adhered, and proliferated well on the lower porous bioactive surface, while non-porous polyurethane surface demonstrated low cell attachment, which was deliberately designed and a pre-requisite for guided tissue regeneration/guided bone regeneration membranes. In addition, in vivo studies performed in a rat model for six weeks revealed good compatibility of membranes. Histological analysis (staining with hematoxylin and eosin) indicated no signs of inflammation or accumulation of host immune cells. These results suggested that the fabricated biocompatible bilayer membrane has the potential for use in periodontal tissue regeneration.
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Shahzadi L, Chaudhry AA, Aleem AR, Malik MH, Ijaz K, Akhtar H, Alvi F, Khan AF, Rehman IU, Yar M. Development of K-doped ZnO nanoparticles encapsulated crosslinked chitosan based new membranes to stimulate angiogenesis in tissue engineered skin grafts. Int J Biol Macromol 2018; 120:721-728. [DOI: 10.1016/j.ijbiomac.2018.08.103] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 08/10/2018] [Accepted: 08/21/2018] [Indexed: 11/30/2022]
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Zeeshan R, Mutahir Z, Iqbal H, Ali M, Iqbal F, Ijaz K, Sharif F, Shah AT, Chaudhry AA, Yar M, Luan S, Khan AF, Ihtesham-ur-Rehman. Hydroxypropylmethyl cellulose (HPMC) crosslinked chitosan (CH) based scaffolds containing bioactive glass (BG) and zinc oxide (ZnO) for alveolar bone repair. Carbohydr Polym 2018; 193:9-18. [DOI: 10.1016/j.carbpol.2018.03.046] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 03/15/2018] [Accepted: 03/16/2018] [Indexed: 12/11/2022]
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Jamal A, Shahzadi L, Ahtzaz S, Zahid S, Chaudhry AA, Rehman IU, Yar M. Identification of anti-cancer potential of doxazocin: Loading into chitosan based biodegradable hydrogels for on-site delivery to treat cervical cancer. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 82:102-109. [DOI: 10.1016/j.msec.2017.08.054] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 07/24/2017] [Accepted: 08/10/2017] [Indexed: 12/19/2022]
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Rahim A, Rehman ZU, Mir S, Muhammad N, Rehman F, Nawaz MH, Yaqub M, Siddiqi SA, Chaudhry AA. A non-enzymatic glucose sensor based on CuO-nanostructure modified carbon ceramic electrode. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.10.087] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nasir M, Rauf S, Muhammad N, Hasnain Nawaz M, Anwar Chaudhry A, Hamza Malik M, Ahmad Shahid S, Hayat A. Biomimetic nitrogen doped titania nanoparticles as a colorimetric platform for hydrogen peroxide detection. J Colloid Interface Sci 2017; 505:1147-1157. [DOI: 10.1016/j.jcis.2017.07.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 07/04/2017] [Accepted: 07/04/2017] [Indexed: 11/25/2022]
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Iqbal H, Ali M, Zeeshan R, Mutahir Z, Iqbal F, Nawaz MAH, Shahzadi L, Chaudhry AA, Yar M, Luan S, Khan AF, Rehman IU. Chitosan/hydroxyapatite (HA)/hydroxypropylmethyl cellulose (HPMC) spongy scaffolds-synthesis and evaluation as potential alveolar bone substitutes. Colloids Surf B Biointerfaces 2017; 160:553-563. [PMID: 29024920 DOI: 10.1016/j.colsurfb.2017.09.059] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 09/08/2017] [Accepted: 09/29/2017] [Indexed: 01/27/2023]
Abstract
Alveolar bone loss is associated with infections and its augmentation is a pre-requisite for the success of dental implants. In present study, we aim to develop and evaluate novel freeze dried doxycycline loaded chitosan (CS)/hydroxyapatite (HA) spongy scaffolds where hydroxypropylmethyl cellulose (HPMC) was added as a crosslinker. Scaffolds displayed compressive strength of 14MPa/cm3 and 0.34 as elastic response. The interconnected pore diameter was 41-273μm, favorably provided the template supporting cells and transport. An overall 10% degradation was seen after 14day's studies at pH 7.4 in PBS. Doxycycline hyclate, a frequently used drug to counter oral infections, demonstrated an initial burst release (6-8h), followed by a sustain release profile for the remaining 64h. CS/HA/HPMC scaffolds were nontoxic and promoted pre-osteoblast cell viability as seen with live/dead calcein staining after 24h where scaffolds with 10% and 25% HPMC by weight of scaffold had more viable cells. Scaffolds with 10%, 20% and 25% HPMC by weight of scaffold showed efficient cellular adhesion as seen in scanning electron microscopy images (day 8) indicating that pre-osteoblast cells were able to adhere well on the surface and into the porous structure via cytoplasmic extensions. Hoechst 33258 nuclear staining at day 2 and 8 indicated cell proliferation which was further supported byMTT assay at day 2, 4 and 8. Although all scaffolds supported pre-osteoblast cell viability, alkaline phosphatase (ALP) staining demonstrated that upon induction, differentiation was pronounced in case of scaffolds with 10% HMPC scaffolds. Conclusively, these materials having all the required mechanical and biological properties are potential candidates for alveolar bone regeneration.
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Obasi HC, Chaudhry AA, Ijaz K, Akhtar H, Malik MH. Development of biocomposites from coir fibre and poly (caprolactone) by solvent casting technique. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-2122-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yar M, Shahzad S, Shahzadi L, Shahzad SA, Mahmood N, Chaudhry AA, Rehman IU, MacNeil S. Heparin binding chitosan derivatives for production of pro-angiogenic hydrogels for promoting tissue healing. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 74:347-356. [PMID: 28254303 DOI: 10.1016/j.msec.2016.12.021] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 11/10/2016] [Accepted: 12/05/2016] [Indexed: 12/22/2022]
Abstract
Our aim was to develop a biocompatible hydrogel that could be soaked in heparin and placed on wound beds to improve the vasculature of poorly vascularized wound beds. In the current study, a methodology was developed for the synthesis of a new chitosan derivative (CSD-1). Hydrogels were synthesized by blending CSD-1 for either 4 or 24h with polyvinyl alcohol (PVA). The physical/chemical interactions and the presence of specific functional groups were confirmed by Fourier transform infrared (FT-IR) spectroscopy and proton nuclear magnetic resonance (1H NMR). The porous nature of the hydrogels was confirmed by scanning electron microscopy (SEM). Thermal gravimetric analysis (TGA) showed that these hydrogels have good thermal stability which was slightly increased as the blending time was increased. Hydrogels produced with 24h of blending supported cell attachment more and could be loaded with heparin to induce new blood vessel formation in a chick chorionic allantoic membrane assay.
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Shahzad S, Shahzadi L, Mahmood N, Siddiqi SA, Rauf A, Manzoor F, Chaudhry AA, Rehman IU, Yar M. A new synthetic methodology for the preparation of biocompatible and organo-soluble barbituric- and thiobarbituric acid based chitosan derivatives for biomedical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 66:156-163. [DOI: 10.1016/j.msec.2016.04.056] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 04/06/2016] [Accepted: 04/14/2016] [Indexed: 10/21/2022]
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Shah AT, Batool M, Chaudhry AA, Iqbal F, Javaid A, Zahid S, Ilyas K, bin Qasim S, Khan AF, Khan AS, ur Rehman I. Effect of calcium hydroxide on mechanical strength and biological properties of bioactive glass. J Mech Behav Biomed Mater 2016; 61:617-626. [DOI: 10.1016/j.jmbbm.2016.03.030] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 03/29/2016] [Accepted: 03/30/2016] [Indexed: 12/21/2022]
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Shahzadi L, Yar M, Jamal A, Siddiqi SA, Chaudhry AA, Zahid S, Tariq M, Rehman IU, MacNeil S. Triethyl orthoformate covalently cross-linked chitosan-(poly vinyl) alcohol based biodegradable scaffolds with heparin-binding ability for promoting neovascularisation. J Biomater Appl 2016; 31:582-593. [DOI: 10.1177/0885328216650125] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
There is a need to develop pro-angiogenic biomaterials to promote wound healing and to assist in regenerative medicine. To this end, various growth factors have been exploited which have the potential to promote angiogenesis. However, these are generally expensive and labile which limits their effectiveness. An alternative approach is to immobilize heparin onto biocompatible degradable hydrogels. The heparin in turn will then bind endogenous proangiogenic growth factors to induce formation of new blood vessels. In this study, we continue our development of hydrogels for wound healing purposes by exploring covalently cross-linking chitosan and polyvinyl alcohol hydrogels using triethyl orthoformate. Two concentrations of triethyl orthoformate (4 and 16%) were compared for their effects on the structure of hydrogels – their swelling, pore size, and rate of degradation and for their ability to support the growth of cells and for their heparin-binding capacity and their effects on angiogenesis in a chick chorioallantoic membrane assay. Hydrogels formed with 4 or 16% both triethyl orthoformate cross-linker were equally cyto-compatible. Hydrogels formed with 4% triethyl orthoformate absorbed slightly more water than those made with 16% triethyl orthoformate and broke down slightly faster than non-cross-linked hydrogels. When soaked in heparin the hydrogel formed with 16% triethyl orthoformate showed more blood vessel formation in the CAM assay than that formed with 4% triethyl orthoformate.
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Yar M, Gigliobianco G, Shahzadi L, Dew L, Siddiqi SA, Khan AF, Chaudhry AA, Rehman IU, MacNeil S. Production of chitosan PVA PCL hydrogels to bind heparin and induce angiogenesis. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2015.1129959] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Tabassum S, Zahid S, Zarif F, Gilani MA, Manzoor F, Rehman F, Jamal A, Chaudhry AA, Siddiqi SA, Rehman IU. Efficient drug delivery system for bone repair by tuning the surface of hydroxyapatite particles. RSC Adv 2016. [DOI: 10.1039/c6ra24551j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Efficient drug delivery vehicles, hydroxyapatite modified by carboxylic acids, were prepared by an in situ co-precipitation method. The presence of functional groups and subsequent surface properties of modified HA improved ibuprofen loading and release efficiency.
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Zahid S, Shah AT, Jamal A, Chaudhry AA, Khan AS, Khan AF, Muhammad N, Rehman IU. Biological behavior of bioactive glasses and their composites. RSC Adv 2016. [DOI: 10.1039/c6ra07819b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
This review summarizes current developments in improving the biological behavior of bioactive glasse and their composites.
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Yar M, Shahzad S, Siddiqi SA, Mahmood N, Rauf A, Anwar MS, Chaudhry AA, Rehman IU. Triethyl orthoformate mediated a novel crosslinking method for the preparation of hydrogels for tissue engineering applications: characterization and in vitro cytocompatibility analysis. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 56:154-64. [PMID: 26249576 DOI: 10.1016/j.msec.2015.06.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 05/04/2015] [Accepted: 06/09/2015] [Indexed: 10/23/2022]
Abstract
This paper describes the development of a new crosslinking method for the synthesis of novel hydrogel films from chitosan and PVA for potential use in various biomedical applications. These hydrogel membranes were synthesized by blending different ratios of chitosan (CS) and poly(vinyl alcohol) (PVA) solutions and were crosslinked with 2.5% (w/v) triethyl orthoformate (TEOF) in the presence of 17% (w/v) sulfuric acid. The physical/chemical interactions and the presence of specific functional groups in the synthesized materials were evaluated by Fourier transform infrared (FT-IR) spectroscopy. The morphology, structure and pore size of the materials were investigated by scanning electron microscopy (SEM). Thermal gravimetric analysis (TGA) proved that these crosslinked hydrogel films have good thermal stability which was decreased as the CS ratio was increased. Differential scanning calorimetry (DSC) exhibited that CS and PVA were present in the amorphous form. The solution absorption properties were performed in phosphate buffer saline (PBS) solution of pH7.4. The 20% PVA-80% CS crosslinked hydrogel films showed a greater degree of solution absorption (183%) as compared to other compositions. The hydrogels with greater CS concentration (60% and 80%) demonstrated relatively more porous structure, better cell viability and proliferation and also revealed good blood clotting ability even after crosslinking. Based on the observed facts these hydrogels can be tailored for their potential utilization in wound healing and skin tissue engineering applications.
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Farooq A, Yar M, Khan AS, Shahzadi L, Siddiqi SA, Mahmood N, Rauf A, Qureshi ZUA, Manzoor F, Chaudhry AA, ur Rehman I. Synthesis of piroxicam loaded novel electrospun biodegradable nanocomposite scaffolds for periodontal regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 56:104-13. [PMID: 26249571 DOI: 10.1016/j.msec.2015.06.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 05/12/2015] [Accepted: 06/09/2015] [Indexed: 11/17/2022]
Abstract
Development of biodegradable composites having the ability to suppress or eliminate the pathogenic micro-biota or modulate the inflammatory response has attracted great interest in order to limit/repair periodontal tissue destruction. The present report includes the development of non-steroidal anti-inflammatory drug encapsulated novel biodegradable chitosan (CS)/poly(vinyl alcohol) (PVA)/hydroxyapatite (HA) electro-spun (e-spun) composite nanofibrous mats and films and study of the effect of heat treatment on fibers and films morphology. It also describes comparative in-vitro drug release profiles from heat treated and control (non-heat treated) nanofibrous mats and films containing varying concentrations of piroxicam (PX). Electrospinning was used to obtain drug loaded ultrafine fibrous mats. The physical/chemical interactions were evaluated by Fourier Transform Infrared (FT-IR) spectroscopy. The morphology, structure and pore size of the materials were investigated by scanning electron microscopy (SEM). The thermal behavior of the materials was investigated by thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC). Control (not heat treated) and heat treated e-spun fibers mats and films were tested for in vitro drug release studies at physiological pH7.4 and initially, as per requirement burst release patterns were observed from both fibers and films and later sustained release profiles were noted. In vitro cytocompatibility was performed using VERO cell line of epithelial cells and all the synthesized materials were found to be non-cytotoxic. The current observations suggested that these materials are potential candidates for periodontal regeneration.
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Haider W, Hayat A, Raza Y, Anwar Chaudhry A, Rehman IU, Marty JL. Gold nanoparticle decorated single walled carbon nanotube nanocomposite with synergistic peroxidase like activity for d-alanine detection. RSC Adv 2015. [DOI: 10.1039/c5ra01258a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this report, a gold nanoparticle decorated single walled carbon nanotube (SWCNTs) nanocomposite was shown to possess synergistic intrinsic peroxidase like activity and enhanced affinity towards H2O2 oxidation.
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Khan AS, Aamer S, Chaudhry AA, Wong FS, Rehman IU. Synthesis and characterizations of a fluoride-releasing dental restorative material. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:3458-64. [DOI: 10.1016/j.msec.2013.04.029] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 04/01/2013] [Accepted: 04/15/2013] [Indexed: 11/30/2022]
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Chaudhry AA, Sulkowski MS, Chander G, Moore RD. Authors' response to Drs Trabut, Mallet and Pol. HIV Med 2009. [DOI: 10.1111/j.1468-1293.2009.00746_1.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Chaudhry AA, Sulkowski MS, Chander G, Moore RD. Hazardous drinking is associated with an elevated aspartate aminotransferase to platelet ratio index in an urban HIV-infected clinical cohort. HIV Med 2008; 10:133-42. [PMID: 19207596 DOI: 10.1111/j.1468-1293.2008.00662.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVES The aim of the study was to determine the relationship between alcohol consumption and liver fibrosis as assessed by aspartate aminotransferase to platelet ratio index (APRI) in HIV-infected adults and to explore the relative contributions of alcohol and hepatitis C virus (HCV) to APRI among HIV/HCV-coinfected adults. METHODS We performed a cross-sectional analysis of data from an observational clinical cohort. Alcohol consumption was categorized according to National Institute on Alcohol Abuse and Alcoholism guidelines. We defined significant liver disease as APRI>1.5, and used multinomial logistic regression to identify correlates of increased APRI. RESULTS Among 1358 participants, 10.4% reported hazardous drinking. It was found that 11.6% had APRI>1.5, indicating liver fibrosis. Hazardous drinking was associated with increased APRI [adjusted relative risk ratio (RRR) 2.30; 95% confidence interval (CI) 1.26-4.17]. Other factors associated with increased APRI were male gender, viral hepatitis, and HIV transmission category of injecting drug use. Among coinfected individuals, 18.3% had APRI>1.5, and hazardous drinking was not associated with APRI. Among non-HCV-infected individuals, 5.3% had APRI>1.5 and hazardous drinking was associated with increased APRI (adjusted RRR 3.72; 95% CI 1.40-9.87). CONCLUSIONS Hazardous drinking is an important modifiable risk factor for liver fibrosis, particularly among non-HCV-infected patients. Clinicians and researchers must address alcohol use as the burden of liver disease increases among HIV-positive individuals.
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Chaudhry AA, Goodall J, Vickers M, Cockcroft JK, Rehman I, Knowles JC, Darr JA. Synthesis and characterisation of magnesium substituted calcium phosphate bioceramic nanoparticles made via continuous hydrothermal flow synthesis. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b807920j] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
A patient with features suggesting pulmonary haemosiderosis was found to have a myxoma. The pulmonary lesion cleared after excision of the tumour.
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Yam LT, Chaudhry AA, Janckila AJ. Impaired marrow granulocyte reserve and leukocyte mobilization in leukemic reticuloendotheliosis. Ann Intern Med 1977; 87:444-6. [PMID: 907243 DOI: 10.7326/0003-4819-87-4-444] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Cytotoxic chemotherapy often induces sustained, severe granulocytopenia in patients with leukemic reticuloendotheliosis. Many of the patients so treated subsequently develop serious infections. Poor marrow reserve has been implicated but lacks supporting evidence as the cause of the granulocytopenia. In six patients we studied with leukemic reticuloendotheliosis, bone marrow showed severe granulocytopenia, blood neutrophil response after intravenous hydrocortisone injection was poor, and leukocyte migration to the site of inflammation showed suboptimal neutrophilia and poor or no mononuclear response. Splenic hypersequestration and pooling were probably not important factors in causing neutropenia, since similar results were seen in patients without spleens. These findings suggest that in this disease the marrow granulocyte reserve and leukocyte mobilization are impaired and the neutropenia is due to poor granulocyte production and not to increased migration of leukocytes to tissues. Cytotoxic chemotherapy should be used with caution in patients with this disease.
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