MILANO – “Nel dibattito sullo stadio del Milan al Portello, al di là del tifo, manca del tutto una valutazione concreta sull’interesse della collettività. La zona del Portello è densamente popolata e vanno ascoltate le ragioni dei residenti: non dobbiamo perdere di vista i problemi reali di logistica, accessibilità, traffico, ordine pubblico e inquinamento acustico. Per il nuovo stadio del Milan andrebbe designata un’area che garantisca la sicurezza dei cittadini, e Milano è ricca di zone in disuso pronte per le bonifiche e la riqualificazione, e Fondazione Fiera deve spiegare, dati alla mano, la ricaduta dell’investimento per tutta la collettività e non solo per i diretti interessati nella compravendita. Auspichiamo che l’ente agisca nell’interesse dei cittadini e non sotto la pressione della politica e dei suoi interessi dato i cognomi dei “player” coinvolti. Non vorremmo fosse una scelta volta ad aumentare il valore di una società sportiva prossima alla vendita”.
Così Stefano Buffagni, consigliere regionale del Movimento 5 Stelle della Lombardia.
28042015
Hydroquinone
Overview
Hydroquinone is a potent antioxidant with multiple biological effects.
It is commonly used in various medical and
cosmetic applications due to its ability to inhibit oxidative stress and protect cellular structures.
Mechanism of Action
Hydroquinone exerts its effects primarily through antioxidant activity, where it neutralizes free radicals and reduces oxidative damage.
Its mechanisms include:
Inhibition of reactive oxygen species (ROS) production
Protection of DNA, proteins, and lipids from oxidative damage
Modulation of cellular signaling pathways
Indications and Dosage
Hydroquinone is used in the treatment of conditions involving
oxidative stress, such as:
Aging-related skin conditions
Acne vulgaris
Hyperpigmentation disorders
Certain neurodegenerative conditions
The dosage of hydroquinone varies depending on the condition being treated and the specific formulation used.
Adverse Effects
While generally well-tolerated, hydroquinone can cause a range of adverse effects including:
Gastrointestinal upset
Allergic reactions
Transient increases in liver enzymes
Brown discoloration of skin and tissues (rare)
Precautions
Patients should be advised of the following precautions when using
hydroquinone:
Contraindications: Use is avoided in individuals with a history of sensitivity to it or its metabolites.
Pregnancy: Limited data on safety during pregnancy; use should be avoided unless medically necessary and under supervision.
Drug interactions: Potential for enhanced effects when combined with other oxidizing agents or medications that may
increase oxidative stress.
Allergic reactions: Discontinue immediately in case of allergic symptoms
(e.g., rash, itching).
References
A comprehensive list of references supports the use and mechanisms of hydroquinone.
Further details can be found in relevant scientific studies and clinical guidelines.
# Hydroquinone: A Comprehensive Overview
## Overview
Hydroquinone (also known as para-aminophenol) is a medication primarily used to treat hyperpigmentation disorders such as
melasma and hypomelanosis. It works by inhibiting the enzyme tyrosinase,
which is responsible for the production of
melanin.
## Mechanism of Action
Hydroquinone exerts its effects by competing with
the substrate tyrosine at the catalytic site of tyrosinase.
This leads to a reduction in the synthesis of melanin, thereby lightening hyperpigmented lesions.
## Indications
– **Melasma**: A common condition characterized by darkened patches on the face, particularly
in sun-exposed areas.
– **Hypomelanosis**: A rare genetic disorder causing depigmentation.
– **Post-inflammatory hypopigmentation**: Occurs after certain skin injuries or infections.
## Adverse Effects
Common side effects include:
– Dermal irritation (e.g., erythema, dryness)
– Textile dystrophy (a rare condition leading to thickened and brittle
skin)
– Onycholysis (nail separation)
## Contraindications
– **Allergic reactions**: Patients with a history of allergic reactions to hydroquinone or similar compounds should be cautious.
– **Pregnancy**: Use in pregnancy is generally
avoided due to potential risks.
## Monitoring
Monitor for signs of local irritation and skin darkening.
Periodic follow-ups are recommended to assess treatment efficacy.
## Toxicity
Hydroquinone is considered relatively safe when used as directed.
Overdosing can lead to more severe adverse effects,
including liver damage and methemoglobinemia.
## Enhancing Healthcare Team Outcomes
Effective communication between healthcare providers and patients is crucial for ensuring proper use and monitoring of hydroquinone.
## Review Questions
1. What is the primary indication for hydroquinone?
**Answer**: Melasma and hypomelanosis.
2. How does hydroquinone inhibit melanin synthesis?
**Answer**: By competing with tyrosine at the tyrosinase catalytic site.
## References
– StatPearls NCBI Bookshelf: Hydroquinone Online.
Available from: Link to StatPearls content.
## Views
The efficacy of hydroquinone in treating hyperpigmentation is well-established, though individual responses may vary.
## In This Page
– Bulk Download: Option available for downloading relevant materials.
– Related Information: Additional resources and studies linked on the platform.
– Similar Articles in PubMed: Search for comparable studies using PubMed.
## Recent Activity
Updates and new findings related to hydroquinone usage are regularly added to
StatPearls NCBI Bookshelf.
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