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  1. Article ; Online: The Antiangiogenic Effect and Ocular Pharmacology of Novel Modified Nonsteroidal Anti-Inflammatory Drugs in the Treatment of Oxygen-Induced Retinopathy.

    Huang, Wei / Huang, Liqun / Wen, Ziyi / Honkanen, Robert A / Rigas, Basil

    Journal of ocular pharmacology and therapeutics : the official journal of the Association for Ocular Pharmacology and Therapeutics

    2023  Volume 39, Issue 4, Page(s) 279–289

    Abstract: Purpose: ...

    Abstract Purpose:
    MeSH term(s) Humans ; Animals ; Mice ; Infant, Newborn ; Oxygen ; Retinal Vessels ; Animals, Newborn ; Tissue Distribution ; Retinal Diseases/drug therapy ; Angiogenesis Inhibitors/pharmacology ; Angiogenesis Inhibitors/therapeutic use ; Anti-Inflammatory Agents/therapeutic use ; Disease Models, Animal ; Mice, Inbred C57BL ; Retinal Neovascularization/chemically induced ; Retinal Neovascularization/drug therapy ; Retinopathy of Prematurity/drug therapy
    Chemical Substances Oxygen (S88TT14065) ; OXT-328 ; Angiogenesis Inhibitors ; Anti-Inflammatory Agents
    Language English
    Publishing date 2023-05-12
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1237021-6
    ISSN 1557-7732 ; 1080-7683
    ISSN (online) 1557-7732
    ISSN 1080-7683
    DOI 10.1089/jop.2022.0113
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Diagnosis of Dry Eye Disease Using Principal Component Analysis: A Study in Animal Models of the Disease.

    Honkanen, Robert / Nemesure, Barbara / Huang, Liqun / Rigas, Basil

    Current eye research

    2021  Volume 46, Issue 5, Page(s) 622–629

    Abstract: Purpose: To evaluate whether principal component analysis (PCA) can assess various diagnostic tests of dry eye disease (DED), providing a simplified, more informative measure of disease status than individual clinical test parameters (ICTP).: ... ...

    Abstract Purpose: To evaluate whether principal component analysis (PCA) can assess various diagnostic tests of dry eye disease (DED), providing a simplified, more informative measure of disease status than individual clinical test parameters (ICTP).
    Materials and methods: ICTP were analyzed using PCA in two groups of normal rabbits (Groups 1 and 2). Group 3, not truly normal, was also assessed. DED was induced in Group 1 by complete dacryoadenectomy; in Groups 2 and 3 by injection of concanavalin A. Tear break up time, tear osmolarity, Schirmer's tear test and rose bengal staining were the ICTP measured in all groups. Statistical analysis including descriptive statistics, t test, correlation coefficients and PCA was done. PCA using ICTP data from Group 1 generated axes; Group 2 and 3 were plotted over these axes.
    Results: All groups had induction of DED. Correlations for all ICTP were in the correct direction and were strongest for Group 1 and weakest in Group 3. PCA clearly separated DED and normal eyes. Principal component (PC) 1, made up of nearly equal contributions from the four clinical tests, explained 73% of the variation and provided a means to separate normal from DED. PC 1 values under 0.52 can be mathematically defined as DED. Of all pairwise comparisons, PC 1 vs PC 2 and PC 1 vs PC 3 were the most informative providing excellent spatial separation and additional information regarding DED status.
    Conclusions: PCA proved useful for evaluating DED providing a simpler, more comprehensive assessment than ICTP. PC 1 is a valuable, clinically relevant, and informative metric for DED status and severity having superior diagnostic value and statistical strength compared to ICTP. Spatial information on biplots of PC 1 vs PC 3 is also informative. PCA, and specifically PC 1, has the potential to serve as a biomarker for DED.
    MeSH term(s) Animals ; Diagnostic Techniques, Ophthalmological ; Disease Models, Animal ; Dry Eye Syndromes/diagnosis ; Dry Eye Syndromes/physiopathology ; Male ; Osmolar Concentration ; Principal Component Analysis/methods ; Rabbits ; Tears/chemistry ; Tears/physiology
    Language English
    Publishing date 2021-01-14
    Publishing country England
    Document type Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 82079-9
    ISSN 1460-2202 ; 0271-3683
    ISSN (online) 1460-2202
    ISSN 0271-3683
    DOI 10.1080/02713683.2020.1830115
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A Rabbit Model of Aqueous-Deficient Dry Eye Disease Induced by Concanavalin A Injection into the Lacrimal Glands: Application to Drug Efficacy Studies.

    Honkanen, Robert A / Huang, Liqun / Rigas, Basil

    Journal of visualized experiments : JoVE

    2020  , Issue 155

    Abstract: Dry eye disease (DED), a multifactorial inflammatory disease of the ocular surface, affects 1 in 6 humans worldwide with staggering implications for quality of life and health care costs. The lack of informative animal models that recapitulate its key ... ...

    Abstract Dry eye disease (DED), a multifactorial inflammatory disease of the ocular surface, affects 1 in 6 humans worldwide with staggering implications for quality of life and health care costs. The lack of informative animal models that recapitulate its key features impedes the search for new therapeutic agents for DED. Available DED animal models have limited reproducibility and efficacy. A model is presented here in which DED is induced by injecting the mitogen concanavalin A (Con A) into the orbital lacrimal glands of rabbits. Innovative aspects of this model are the use of ultrasound (US) guidance to ensure optimal and reproducible injection of Con A into the inferior lacrimal gland; injection of Con A into all orbital lacrimal glands that limits compensatory production of tears; and use of periodic repeat injections of Con A that prolong the state of DED at will. DED and its response to test agents are monitored with a panel of parameters that assess tear production, the stability of the tear film, and the status of the corneal and conjunctival mucosa. They include tear osmolarity, tear break-up time, Schirmer's tear test, rose bengal staining, and tear lactoferrin levels. The induction of DED and the monitoring of its parameters are described in detail. This model is simple, robust, reproducible, and informative. This animal model is suitable for the study of tear physiology and of the pathophysiology of DED as well as for the assessment of the efficacy and safety of candidate agents for the treatment of DED.
    MeSH term(s) Animals ; Concanavalin A/adverse effects ; Disease Models, Animal ; Dry Eye Syndromes/chemically induced ; Female ; Humans ; Injections ; Lacrimal Apparatus/drug effects ; Male ; Quality of Life/psychology ; Rabbits ; Reproducibility of Results
    Chemical Substances Concanavalin A (11028-71-0)
    Language English
    Publishing date 2020-01-24
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Video-Audio Media
    ZDB-ID 2259946-0
    ISSN 1940-087X ; 1940-087X
    ISSN (online) 1940-087X
    ISSN 1940-087X
    DOI 10.3791/59631
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: An Improved Ocular Impression Cytology Method: Quantitative Cell Transfer to Microscope Slides Using a Novel Polymer.

    Master, Adam / Huang, Wei / Huang, Liqun / Honkanen, Robert / Rigas, Basil

    Current eye research

    2021  Volume 47, Issue 1, Page(s) 41–50

    Abstract: Purpose: To develop a more efficient impression cytology (IC) method for the transfer of ocular surface cells onto glass microscope slides for cytochemical, immunocytochemical, and immunofluorescence studies.: Methods: Cells are lifted off the ocular ...

    Abstract Purpose: To develop a more efficient impression cytology (IC) method for the transfer of ocular surface cells onto glass microscope slides for cytochemical, immunocytochemical, and immunofluorescence studies.
    Methods: Cells are lifted off the ocular surface with a mixed cellulose ester membrane and then firmly attached to a glass slide using a novel triblock copolymer comprised of collagen type I, polyethylenimine and poly-L-lysine (CPP), and crosslinking cells and glass slide by heating and cooling. The membrane is removed intact after softening it with a butanol/ethanol solution. Transfer of cells is complete in about 10-15 minutes and is ready for staining. The efficiency of our cell transfer method was compared to current methods based on poly-L-lysine and albumin paste.
    Results: Our method ensured almost complete transfer of cells. In contrast, the transfer of rabbit conjunctiva cells onto poly-L-lysine-covered slides was 37.5 ± 6.3% lower, and onto albumin-paste covered slides 62.5 ± 5.6% lower (mean ± SD); the transfer of rabbit goblet cells was even less efficient. The new method was also more efficient for transfer of cells from human oral mucosa obtained by IC. Transferred cells were successfully stained with H&E, chemiluminescence, and immunofluorescence agents. Using our method, we stained ocular surface cells for S100A4 and ATF4, both of which play a role in the pathophysiology of dry eye disease. We obtained similar results with oral mucosal cells, suggesting the generalizability of our approach. We propose an explanation for the strong adhesion of cells to the glass slide, which is based on their interactions with the triblock copolymer.
    Conclusions: We developed a novel approach for the efficient and rapid transfer of cells obtained by IC onto glass microscope slides using a novel copolymer. Compared to available methods, our improved approach makes IC robust and simple, and should increase its diagnostic yield and clinical applicability.
    MeSH term(s) Aged ; Animals ; Cytological Techniques/trends ; Female ; Goblet Cells/cytology ; Humans ; Male ; Microscopy/methods ; Middle Aged ; Models, Animal ; Polymers/pharmacology ; Rabbits
    Chemical Substances Polymers
    Language English
    Publishing date 2021-11-27
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 82079-9
    ISSN 1460-2202 ; 0271-3683
    ISSN (online) 1460-2202
    ISSN 0271-3683
    DOI 10.1080/02713683.2021.1951300
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Correction: The Chemoprevention of Ovarian Cancer: the Need and the Options.

    Kathawala, Rishil J / Kudelka, Andrzej / Rigas, Basil

    Current pharmacology reports

    2018  Volume 4, Issue 5, Page(s) 414

    Abstract: This corrects the article DOI: 10.1007/s40495-018-0133-6.]. ...

    Abstract [This corrects the article DOI: 10.1007/s40495-018-0133-6.].
    Language English
    Publishing date 2018-09-10
    Publishing country Switzerland
    Document type Published Erratum
    ISSN 2198-641X
    ISSN 2198-641X
    DOI 10.1007/s40495-018-0159-9
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  6. Article ; Online: Phospho-Sulindac (OXT-328) Inhibits Dry Eye Disease in Rabbits: A Dose-, Formulation- and Structure-Dependent Effect.

    Huang, Wei / Wen, Ziyi / Saglam, Muhammet S / Huang, Liqun / Honkanen, Robert A / Rigas, Basil

    Journal of ocular pharmacology and therapeutics : the official journal of the Association for Ocular Pharmacology and Therapeutics

    2021  Volume 37, Issue 6, Page(s) 321–330

    Abstract: Purpose: ...

    Abstract Purpose:
    MeSH term(s) Administration, Topical ; Animals ; Drug Compounding ; Dry Eye Syndromes/drug therapy ; Dry Eye Syndromes/metabolism ; Dry Eye Syndromes/pathology ; Male ; Organophosphorus Compounds/administration & dosage ; Organophosphorus Compounds/chemistry ; Organophosphorus Compounds/pharmacokinetics ; Rabbits ; Sulindac/administration & dosage ; Sulindac/analogs & derivatives ; Sulindac/chemistry ; Sulindac/pharmacokinetics ; Tissue Distribution
    Chemical Substances OXT-328 ; Organophosphorus Compounds ; Sulindac (184SNS8VUH)
    Language English
    Publishing date 2021-06-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1237021-6
    ISSN 1557-7732 ; 1080-7683
    ISSN (online) 1557-7732
    ISSN 1080-7683
    DOI 10.1089/jop.2019.0025
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: NSAID-induced corneal melt: Clinical importance, pathogenesis, and risk mitigation.

    Rigas, Basil / Huang, Wei / Honkanen, Robert

    Survey of ophthalmology

    2019  Volume 65, Issue 1, Page(s) 1–11

    Abstract: Corneal melt, an ophthalmological condition in which corneal epithelium is lost accompanied by thinning of the corneal stroma, can lead to corneal perforation and cause loss of vision. Corneal melt is the most serious side effect of topical nonsteroidal ... ...

    Abstract Corneal melt, an ophthalmological condition in which corneal epithelium is lost accompanied by thinning of the corneal stroma, can lead to corneal perforation and cause loss of vision. Corneal melt is the most serious side effect of topical nonsteroidal anti-inflammatory drugs (NSAIDs), one of the topical treatments of ocular inflammation. NSAID-induced corneal melt (NICM), initially doubted, is real, having been reported by multiple groups. NICM is induced by all but one of the approved ocular NSAIDs and occurs usually in patients whose cornea is compromised by ocular surgery, diabetes, or autoimmune diseases. Its true incidence, most likely low, remains unknown. NSAID dose and duration of treatment may be important for NICM. NICM appears to evolve in two stages: the epithelial stage-marked by a corneal epithelial defect, reduced eicosanoid levels, leukocyte infiltration, and matrix metalloproteinase-facilitated desquamation-and the stromal stage, characterized by degradation of stromal collagen by activated matrix metalloproteinases. Awareness of this ominous side effect, its risk factors, and the need for prompt action once diagnosed, including NSAID discontinuation, will help mitigate the risk of NICM. Further understanding of NICM and development of efficacious treatments or safer alternatives should help eliminate this rare, but severe, side effect of ocular NSAIDs.
    MeSH term(s) Administration, Topical ; Anti-Inflammatory Agents, Non-Steroidal/administration & dosage ; Anti-Inflammatory Agents, Non-Steroidal/adverse effects ; Cornea/diagnostic imaging ; Cornea/drug effects ; Corneal Diseases/chemically induced ; Corneal Diseases/diagnosis ; Humans ; Ophthalmic Solutions ; Risk Factors ; Slit Lamp Microscopy
    Chemical Substances Anti-Inflammatory Agents, Non-Steroidal ; Ophthalmic Solutions
    Language English
    Publishing date 2019-07-12
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 391346-6
    ISSN 1879-3304 ; 0039-6257
    ISSN (online) 1879-3304
    ISSN 0039-6257
    DOI 10.1016/j.survophthal.2019.07.001
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  8. Article ; Online: Establishment of a Severe Dry Eye Model Using Complete Dacryoadenectomy in Rabbits.

    Honkanen, Robert A / Huang, Liqun / Huang, Wei / Rigas, Basil

    Journal of visualized experiments : JoVE

    2020  , Issue 155

    Abstract: Dry eye disease (DED) is a complex disease with multiple etiologies and variable symptoms, having ocular surface inflammation as its key pathophysiologic step. Despite advances in our understanding of DED, significant knowledge gaps remain. Advances are ... ...

    Abstract Dry eye disease (DED) is a complex disease with multiple etiologies and variable symptoms, having ocular surface inflammation as its key pathophysiologic step. Despite advances in our understanding of DED, significant knowledge gaps remain. Advances are limited in part due to the lack of informative animal models. The authors recently reported on a method of DED induced by injecting all orbital lacrimal gland (LG) tissues with the lectin concanavalin A. Here, we report a novel model of aqueous-deficient DED based on the surgical resection of all orbital LG (dacryoadenectomy) tissues. Both methods use rabbits because of their similarity to human eyes in terms of the size and structure of the ocular surface. One week after removal of the nictitating membrane, the orbital superior LG was surgically removed under anesthesia, followed by removal of the palpebral superior LG, and finally removal of the inferior LG. Dacryoadenectomy induced severe DED, evidenced by a marked reduction in the tear break up time test and the Schirmer's tear test, and significantly increased tear osmolarity and rose bengal staining. Dacryoadenectomy-induced DED lasted at least eight weeks. There were no complications and animals tolerated the procedure well. The technique can be mastered relatively easily by those with adequate surgical experience and appreciation of the relevant rabbit anatomy. Since this model recapitulates the features of human aqueous-deficient DED, it is suitable for studies of ocular surface homeostasis, DED, and candidate therapeutics.
    MeSH term(s) Animals ; Disease Models, Animal ; Dry Eye Syndromes/diagnosis ; Female ; Humans ; Lacrimal Apparatus/physiopathology ; Lacrimal Apparatus/surgery ; Lacrimal Apparatus Diseases/surgery ; Male ; Rabbits ; Tears/metabolism
    Language English
    Publishing date 2020-01-08
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Video-Audio Media
    ZDB-ID 2259946-0
    ISSN 1940-087X ; 1940-087X
    ISSN (online) 1940-087X
    ISSN 1940-087X
    DOI 10.3791/60126
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Animal models of dry eye disease: Useful, varied and evolving (Review).

    Huang, Wei / Tourmouzis, Konstantinos / Perry, Henry / Honkanen, Robert A / Rigas, Basil

    Experimental and therapeutic medicine

    2021  Volume 22, Issue 6, Page(s) 1394

    Abstract: Dry eye disease (DED), which is a prevalent disease that still lacks successful treatment options, remains a major challenge in ophthalmology. Multiple animal models of DED have been used to decipher its pathophysiology and to develop novel treatments. ... ...

    Abstract Dry eye disease (DED), which is a prevalent disease that still lacks successful treatment options, remains a major challenge in ophthalmology. Multiple animal models of DED have been used to decipher its pathophysiology and to develop novel treatments. These models use mice, rats, rabbits, cats, dogs and non-human primates. Each model assesses aspects of DED by focusing on elements of the lacrimal functional unit, which controls the homeostasis of the tear film. The present review outlines representative DED animal models and assesses their contribution to the study of DED. Murine models are the most extensively used, followed by rabbit models; the latter offer the advantage of larger eyes, a favorable biochemical profile for drug studies, experimental ease and relatively low cost, contrasting with non-human primates, which, although closer to humans, are not as accessible and are expensive. No comprehensive 'ideal' animal model encompassing all aspects of human DED exists nor is it feasible. Investigators often choose an animal model based on their experimental needs and the following four features of a given model: The size of the eye, its biochemical composition, the available research reagents and cost. As research efforts in DED expand, more refined animal models are needed to supplement the enormous contribution made to date by existing models.
    Language English
    Publishing date 2021-10-01
    Publishing country Greece
    Document type Journal Article ; Review
    ZDB-ID 2683844-8
    ISSN 1792-1015 ; 1792-0981
    ISSN (online) 1792-1015
    ISSN 1792-0981
    DOI 10.3892/etm.2021.10830
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Phosphosulindac (OXT-328) prevents and reverses chemotherapy induced peripheral neuropathy in mice.

    Basu, Aryah / Yang, Jennifer Y / Tsirukis, Vasiliki E / Loiacono, Andrew / Koch, Gina / Khwaja, Ishan A / Krishnamurthy, Mahila / Fazio, Nicholas / White, Emily / Jha, Aayushi / Shah, Shrila / Takmil, Cameron / Bagdas, Deniz / Demirer, Aylin / Master, Adam / Natke, Ernest / Honkanen, Robert / Huang, Liqun / Rigas, Basil

    Frontiers in neuroscience

    2024  Volume 17, Page(s) 1240372

    Abstract: Background: Chemotherapy-induced peripheral neuropathy (CIPN), a side effect of chemotherapy, is particularly difficult to treat. We explored whether phosphosulindac (PS), a modified NSAID, could treat CIPN.: Methods: CIPN was induced in male C57BL/6  ...

    Abstract Background: Chemotherapy-induced peripheral neuropathy (CIPN), a side effect of chemotherapy, is particularly difficult to treat. We explored whether phosphosulindac (PS), a modified NSAID, could treat CIPN.
    Methods: CIPN was induced in male C57BL/6 J mice by paclitaxel, vincristine or oxaliplatin. Mechanical allodynia was measured with the von Frey test and cold allodynia with the acetone test. To determine the preventive effect of PS, it was administered 2 days before the induction of CIPN. Mouse Lewis lung carcinoma xenografts were used to determine if PS altered the chemotherapeutic efficacy of paclitaxel. Cultured cell lines were used to evaluate the effect of PS on neuroinflammation.
    Results: Treatment with each of the three chemotherapeutic agents used to induce CIPN lowered the mechanical allodynia scores by 56 to 85% depending on the specific agent. PS gel was applied topically 3x/day for 16-22 days to the hind paws of mice with CIPN. This effect was dose-dependent. Unlike vehicle, PS returned mechanical allodynia scores back to pre-CIPN levels. PS had a similar effect on paclitaxel-induced CIPN cold allodynia. Sulindac, a metabolite of PS, had no effect on CIPN. PS significantly prevented CIPN compared to vehicle. Given concomitantly with paclitaxel to mice with lung cancer xenografts, PS relieved CIPN without affecting the anticancer effect of paclitaxel. The enantiomers of PS were equally efficacious against CIPN, suggesting the therapeutic suitability of the racemate PS. There were no apparent side effects of PS. PS suppressed the levels of IL-6, IL-10, CXCL1, and CXCL2 induced by paclitaxel in a neuroblastoma cell line, and macrophage activation to the M1 proinflammatory phenotype.
    Conclusion: Topically applied PS demonstrated broad therapeutic and preventive efficacy against CIPN, preserved the anticancer effect of paclitaxel, and was safe. Its anti-CIPN effect appears to be mediated, in part, by suppression of neuroinflammation. These data support further evaluation of topical PS for the control of CIPN.
    Language English
    Publishing date 2024-01-29
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2411902-7
    ISSN 1662-453X ; 1662-4548
    ISSN (online) 1662-453X
    ISSN 1662-4548
    DOI 10.3389/fnins.2023.1240372
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