Photodynamic therapy (PDT) is a method of cancer treatment that leads to the disintegration of cancer cells and has developed significantly in recent years. The clinically used photosensitizers are primarily porphyrin, which absorbs light in the red spectrum and their absorbance maxima are relatively short. This review presents group of compounds and their derivatives that are considered to be potential photosensitizers in PDT. Cyanine dyes are compounds that typically absorb light in the visible to near-infrared-I (NIR-I) spectrum range (750–900 nm). This meta-analysis comprises the current studies on cyanine dye derivatives, such as indocyanine green (so far used solely as a diagnostic agent), heptamethine and pentamethine dyes, squaraine dyes, merocyanines and phthalocyanines. The wide array of the cyanine derivatives arises from their structural modifications (e.g., halogenation, incorporation of metal atoms or organic structures, or synthesis of lactosomes, emulsions or conjugation). All the following modifications aim to increase solubility in aqueous media, enhance phototoxicity, and decrease photobleaching. In addition, the changes introduce new features like pH-sensitivity. The cyanine dyes involved in photodynamic reactions could be incorporated into sets of PDT agents.

Introduction: Long-chain 3-hydroxyacyl-CoA dehydrogenase (LCHAD) deficiency, typically inherited as a recessive trait, is a genetic condition predominantly observed in Central and Eastern Europe, with birth prevalence in Poland amounting to 1/118,336. In most European countries, e.g., in Poland since 2014, this disorder is included in newborn screening. Case Presentation: This paper presents the ophthalmic symptoms of long-chain 3-hydroxyacyl-CoA dehydrogenase (LCHAD) deficiency in three pediatric patients. Visual acuity testing, fundus photography, and optical coherence tomography (OCT) were performed and data were collected over several years (2017–2022). In case 1, a female born in 2010, exhibited abnormalities in the central part of the posterior pole, mainly in the macula, and included choriocapillaris atrophy and severe disruption of the outer retinal layer. Case 2, a female born in 2012, presented with progressive shortsightedness and choroid atrophy documented with angio-OCT. Case 3, a male born in 2013, experienced recurrent hospitalizations due to metabolic decompensations and presented with mild myopia, thinning of the choroid layer, and slight pigment dispersion with macular sparing. Conclusion: The main ophthalmic symptoms of LCHAD deficiency were choroidal atrophy, disorganization of the outer retinal layer, and myopia. Choroidal atrophy and pigment dispersion were consistently the earliest signs of LCHAD-associated chorioretinopathy. Although the progression of chorioretinopathy in each case resulted from metabolic decompensation, one documented case revealed that not every metabolic crisis results in ophthalmological changes. Nonetheless, strict adherence to a low-fat, high-carbohydrate diet remains crucial to prevent gradual deterioration and vision loss.

Advances in understanding, diagnosis and targeting ATTR cardiomyopathy: a review. Transthyretin amyloidosis (ATTR) manifests as wild-type (ATTRwt) and hereditary/mutant (ATTRv) forms and can lead to heart failure due to cardiac a...

Background: Long-duration spaceflight (LDSF) poses unique challenges to ocular health as microgravity, radiation, and environmental changes can cause lasting visual and structural impairments that affect astronaut performance. Objective: This review synthesises current evidence on in- and post-flight ocular complications. It integrates clinical findings, terrestrial analogues, animal studies, and theoretical models to characterise the pathophysiology, risk factors, and countermeasures associated with spaceflight-induced ocular changes. Methods: A review of peer-reviewed literature was conducted, focusing on dry eye disease, corneal edema, ocular biometric shifts, spaceflight associated neuro-ocular syndrome (SANS), and radiation-induced cataractogenesis. Data from in-flight imaging, post-flight assessments, and ground-based analogues were analysed. Results: Spaceflight induces multifactorial ocular changes, including tear film instability, optic disc edema, posterior globe flattening, and hyperopic refractive shifts. These effects are thought to result from cephalad fluid shifts compartmentalised cerebrospinal fluid pressure, venous congestion, and impaired glymphatic system. Long-term risks, such as cataractogenesis, are linked to radiation exposure and genetic susceptibility. Although several countermeasures are being explored, no single approach fully prevents these complications. Conclusions: Ocular complications during LDSF remain a significant challenge for astronaut health and mission performance. A multimodal approach combining mechanical, nutritional, and diagnostic strategies will be essential for future exploration-class missions. Further research is needed to refine countermeasures and preserve astronauts’ visual function.