356
N. Ashwin Kumar et al.
for MR/CT/Optical imaging systems (see Fig. 12). Also, General Electric (GE) has
developed TaO nanoparticles coated with a zwitterionic agent serves as CT contrast
with improved bioavailability characteristics [112].
On further extension to the above work, Freedman et al. in 2014 acquired
3D articular cartilage, composed of collagen and glucosaminoglycans (GAGs), in
cadaver models of both mouse and human. TaO nanoparticles were functionalized
with different charges of surfactants like phosphate, ammonium, and carboxylate.
Compared to other negative and neutral charged nanoparticles, cartilage models with
positively charged particles possess the highest affinity with visualizable defects
[115]. The biodistribution and exposure of quantifying TaOx NPs with different
organs and body fluids parameter to understand the toxicity levels. The quantitative information of Tantalum metal was at picomolar concentration was determined
using ICP OES by 3 methods of tissue digestion, such as microwave, open beaker,
and dry ash. Injected TaOx NPs in vivo were determined by these methods, the limit
of detection and quantification varied at 6 ng to 6 μg and 0.02–20 μg Ta per gram
[116]. TaO was shown some positive radiotherapy results when showing in vivo. For
example, solid tumors exposed to radiation therapy have higher resistance and show
negligible effects due to the hypoxic condition of the microenvironment. This is due
to the higher production of H 2 O 2, while decomposing into oxygen would reduce the
resistance for enhanced radiotherapy. To overcome this, Song et al. developed PEGTaOx nanoparticles were encapsulated with catalase, decomposing H 2 O 2 , as coreshell particles [117]. In continuation of the above work, drug-loaded mesoporous
nanoparticles were developed to reduce the side effects produced from the free-drug.
Liu and his coworkers together developed doxorubicin loaded into radiosensitizer
mesoporous TaOx NPs for synergistic effect using radiotherapy and chemotherapy
[118]. Later in 2017, Jin et al. developed TaOx as a multi-modal imaging probe by
loading doxorubicin and polypyrrole in the core, and NIR dye conjugated on the
shell of nanoparticles [119]. Other similar works with radiotherapy wherein TaOx
NPs were used as triple sensitization [120] and molybdenum disulphide loaded TaOx
NPs for photothermal therapy [121].
Shapiro and his coworkers developed the highest loaded Ta coated with
hydrophilic and hydrophobic layers labeled with Rhodamine dye. At 100 mM
dosage of TaO NPs they circulated for an extended period by having negligible
cellular toxicity at a concentration of 2.4 mg mL
−1 . In vivo imaging of ductal
trees in rodents showed efficient imaging by injecting Ta in the ductal region of
mammary pads. Further conjugation with PLGA and Mesoporous silica nanoparticles as a shell over the TaO NPs were synthesized with high cell viability at 1.2 mg
Ta mL
−1 . Encapsulation of Ta with different FDA approved capping agents like
PLGA and silica loaded highest Ta materials was not attempted previously [123].
Blending of core up-conversion nanoparticle and shells as TaO NPs to form coreshell particles [122]. Wherein, Core particles were synthesized in a combination of
Yb
3+ /Er
3+ /Tm
3+ doped NaYF 4 nanocrystals and further epitaxially NaGdF 4 grown
on them. TaO was decorated over the core by simple water in oil microemulsion
method functionalized rhodamine and coated with surfactant PEG silane. This unique
N. Ashwin Kumar et al.
for MR/CT/Optical imaging systems (see Fig. 12). Also, General Electric (GE) has
developed TaO nanoparticles coated with a zwitterionic agent serves as CT contrast
with improved bioavailability characteristics [112].
On further extension to the above work, Freedman et al. in 2014 acquired
3D articular cartilage, composed of collagen and glucosaminoglycans (GAGs), in
cadaver models of both mouse and human. TaO nanoparticles were functionalized
with different charges of surfactants like phosphate, ammonium, and carboxylate.
Compared to other negative and neutral charged nanoparticles, cartilage models with
positively charged particles possess the highest affinity with visualizable defects
[115]. The biodistribution and exposure of quantifying TaOx NPs with different
organs and body fluids parameter to understand the toxicity levels. The quantitative information of Tantalum metal was at picomolar concentration was determined
using ICP OES by 3 methods of tissue digestion, such as microwave, open beaker,
and dry ash. Injected TaOx NPs in vivo were determined by these methods, the limit
of detection and quantification varied at 6 ng to 6 μg and 0.02–20 μg Ta per gram
[116]. TaO was shown some positive radiotherapy results when showing in vivo. For
example, solid tumors exposed to radiation therapy have higher resistance and show
negligible effects due to the hypoxic condition of the microenvironment. This is due
to the higher production of H 2 O 2, while decomposing into oxygen would reduce the
resistance for enhanced radiotherapy. To overcome this, Song et al. developed PEGTaOx nanoparticles were encapsulated with catalase, decomposing H 2 O 2 , as coreshell particles [117]. In continuation of the above work, drug-loaded mesoporous
nanoparticles were developed to reduce the side effects produced from the free-drug.
Liu and his coworkers together developed doxorubicin loaded into radiosensitizer
mesoporous TaOx NPs for synergistic effect using radiotherapy and chemotherapy
[118]. Later in 2017, Jin et al. developed TaOx as a multi-modal imaging probe by
loading doxorubicin and polypyrrole in the core, and NIR dye conjugated on the
shell of nanoparticles [119]. Other similar works with radiotherapy wherein TaOx
NPs were used as triple sensitization [120] and molybdenum disulphide loaded TaOx
NPs for photothermal therapy [121].
Shapiro and his coworkers developed the highest loaded Ta coated with
hydrophilic and hydrophobic layers labeled with Rhodamine dye. At 100 mM
dosage of TaO NPs they circulated for an extended period by having negligible
cellular toxicity at a concentration of 2.4 mg mL
−1 . In vivo imaging of ductal
trees in rodents showed efficient imaging by injecting Ta in the ductal region of
mammary pads. Further conjugation with PLGA and Mesoporous silica nanoparticles as a shell over the TaO NPs were synthesized with high cell viability at 1.2 mg
Ta mL
−1 . Encapsulation of Ta with different FDA approved capping agents like
PLGA and silica loaded highest Ta materials was not attempted previously [123].
Blending of core up-conversion nanoparticle and shells as TaO NPs to form coreshell particles [122]. Wherein, Core particles were synthesized in a combination of
Yb
3+ /Er
3+ /Tm
3+ doped NaYF 4 nanocrystals and further epitaxially NaGdF 4 grown
on them. TaO was decorated over the core by simple water in oil microemulsion
method functionalized rhodamine and coated with surfactant PEG silane. This unique